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Cascade DrainbackSRCC OG-300 Certified Solar Water Heating System

Installation, Operation & Maintenance Manual

Cascade DrainbackSRCC OG-300 Certified Solar Water Heating System

Installation, Operation & Maintenance Manual

TMTM

CASCADE DRAINBACK™DOMESTIC SOLAR WATER

HEATING SYSTEMINSTALLATION, OPERATION AND

MAINTENANCE MANUAL

The Cascade Drainback™ solar water heating system has gone through an extensive design, technicaland performance review by the Solar Rating & Certification Corporation (SRCC). The installation of yourCascade Drainback™ system is intended to be executed by properly licensed and experienced profes-sional contractors in accordance with SRCC Standard OG-300, "Operating Guidelines and MinimumStandards For Certifying", and must conform to applicable federal, state and local regulations, codes,ordinances and standards governing the installation of solar water heating systems.

The solar energy system described by this manual, when properly installed and maintained, meets theminimum standards established by the SRCC. This certification does not imply endorsement or warran-ty of this product by the SRCC.

OG-300 system certification is granted to SunEarth by the SRCC. It may not be used for any commer-cial purpose without the prior written consent of SunEarth. SunEarth must approve any deviation fromthe specified materials and methods described in this manual in writing.

The Cascade Drainback solar water heating system may not be installed in areas within thecontinental United States where the annual ambient temperature has ever fallen below minus50° Fahrenheit (-46° Celsius). The Cascade Drainback™ system must be installed as specified inthis manual to have effective freeze protection at these low temperatures.

Freeze tolerance limits are based upon an assumed set of environmental conditions. Extended periodsof cold weather, including ambient air temperatures above the specified limit, may cause freezing inexposed parts of the system. It is the owner’s responsibility to protect the system in accordance withSunEarth’s instructions if the ambient air temperature approaches the specified freeze tolerance limit.

TABLE OF CONTENTS

Preface

1) Introduction ...................................................................................................................1

2) System Description and Operational Principle ...........................................................1

3) Installation Requirements – General............................................................................3

4) Installation Requirements – Specific ............................................................................3

5) System Start Up Procedures .......................................................................................12

6) Two Modes of System Operation ..............................................................................13

7) Isolating The Major Components and Shut Down Procedures................................13

8) Summer Vacation Procedures .....................................................................................14

9) Maintenance and Troubleshooting ............................................................................14

10) Primary System Component Parts............................................................................15

11) Estimated Component Life Expectancy ...................................................................16

12) Cascade Drainback System Model Numbers ...........................................................16

13) SunEarth CopperStor Drainback Tank and Empire Series Collector Specifications ...17

14) A Note on Component Warranties ..........................................................................20

15) SunEarth Warranty Statement .................................................................................21

16) Return Warranty Card ...............................................................................................23

PREFACE

Let us first offer two words of grateful apprecia-tion. Thank You! We sincerely appreciate yourbusiness. SunEarth also wishes to say thank youfor "going solar". Solar water heating systemsreduce our nation’s dependence on polluting fos-sil fuels, minimize the greenhouse gas emissionsassociated with conventional water heating and,very importantly, lower your monthly utility costs.

Established in 1978, SunEarth is a leading U.S.solar equipment manufacturer. Our productsinclude industry standard Imperial™ Empire™and SunWise™ solar water heating collectors,CopperHeart™ integral collector storage sys-tems, SunSiphon™ packaged thermosiphon sys-tems, SunBurst™ all copper absorber plates,Solar Strut™ residential mounting hardware and"RexRack"™ commercial mounting systems. Wealso build specialty collectors for unique architec-tural and building applications. SunEarth SolarRating and Certification Corporation (SRCC)Standard OG-300 certified solar water heatingsystems are sold by leading solar, plumbing andbuilding contractors throughout the UnitedStates.

Your Cascade Drainback solar water heating sys-tem has been designed to meet exacting SRCCOG-300 certification requirements. The specificcomponents found in your system have beenselected by your installation contractor for theirproven reliability, longevity and performance inyour specific region of the country.

1) INTRODUCTION

Solar water heating systems are climate and sitespecific appliances. Different types of solar sys-tems are installed around the world in accor-dance with regional weather and water qualityconditions. System performance varies as a func-tion of the daily household hot water load,including all showers, laundry, and kitchen uses,the average annual ground water and ambientair temperatures, the home’s roof pitch and ori-entation, and, of course, the seasonal intensity ofsolar energy. These variables, some of whichchange from home to home on the same neigh-borhood street, determine how much energy andmoney your Cascade Drainback system will saveon an annual basis.

Your Cascade Drainback solar system is known asa "forced circulation closed loop drainback" sys-tem because it utilizes a mechanical pump to effi-ciently circulate water throughout the unpressur-ized closed loop solar piping. The "drainback"connotation refers to the freeze-protectionmechanism used in the system. In drainback sys-tems, the heat exchange fluid (water) in the col-lector array and solar loop piping drains back bygravity into the CopperStor storage reservoirwhen the pump stops circulating. Air replaceswater in the collector array and solar loop pipingto prevent it from freezing when the pump is off.

This manual is intended as a basic "solar waterheating primer". Our goal is to familiarize youwith the proper installation, operation, and main-tenance of your Cascade Drainback solar system.This system is required to be installed by proper-ly licensed solar or plumbing contractors in accor-dance with SRCC Standard OG-300 and all appli-cable national, state and local codes, ordinancesand regulations governing solar installations aswell as good trade practices. Failure to follow theprocedures and practices described in this manu-al can void manufacturer warranties for specificcomponent parts.

This manual covers systems utilizing either one ortwo SunEarth solar collectors. The collectors mayheat a single solar storage tank or a solar storagetank and an auxiliary electric or gas water heater.For simplicity, the singular form will be usedthroughout this manual when referring to thesystem components and permutations. Frequentreference will be made throughout this manualto specific component parts. The placement ofeach component in the system is found in Figures13 and 14, pages 9 and 10. An explanation ofthe component function is found in Section 10,page 15.

2) SYSTEM DESCRIPTION AND OPERATIONALPRINCIPLE

The key components in the Cascade Drainbacksolar water heating system include the SunEarthsolar collector, CopperStor drainback reservoir,solar storage tank with integral heat exchanger,circulation pump, differential thermostat andmixing valve.

The SunEarth solar collector is the heart of theCascade Drainback system. Simply stated, when

P.1CASCADE DRAINBACK

the sun is shining, heat energy is absorbed by thesolar collector’s all copper absorber plate andtransferred to the water circulating through thesolar collector. The system pump efficiently circu-lates this heated water through the collector pip-ing and integral tank heat exchanger. The heatexchanger consists of a 120’ length of coppertubing wrapped around the solar storage tank.As the water passes through the heat exchanger,the heat in the fluid is transferred to the potablewater in your solar storage tank. As this processis repeated during the average sunny day, thetemperature in your solar storage tank rises.

The circulating pump in a solar water heating sys-tem may be favorably compared with the humanheart. To continue the analogy, the differentialthermostat, or control, is the brain in the system.The control uses two 10K ohm thermistors, orsensors, to constantly monitor the temperaturedifference between the hottest and coldestpoints in the system and to automatically turnthe circulating pump on and off as appropriatethroughout the day.

When the solar collector absorber plate is twen-ty degrees hotter than the temperature in thebottom of your solar storage tank, the controllerwill turn the circulating pump on. When the tem-perature difference has been reduced to four

degrees, the control automatically turns thepump off.

Depending upon the system demand, time ofyear and the weather, the circulating pump mayeither run intermittently throughout the day orconstantly for hours at a time.

Both single and double tank Cascade Drainbacksystems are designed to accommodate two sep-arate modes of system operation. Your systemcan either (1) serve as a preheater to your con-ventional electric or gas water heater or (2) bebypassed entirely and run 100% on utility powerduring inclement weather or when maintenanceis required. Section Six provides instruction insetting the system for automatic operation ineach of these two modes.

The water in the SunEarth collector and the solarloop piping automatically drains back into theCopperStor reservoir each time the circulatingpump turns off. Gravity drains the piping andprovides the freeze protection for your CascadeDrainback system.

To ensure proper drainage the SunEarthsolar collector must be installed in the verti-cal position so that the internal riser tubesrun parallel, not perpendicular, to the planeof the roof.

P.2 CASCADE DRAINBACK

fig. 1

SYSTEM ORIENTATION

The system also can be manually drained in orderto protect the integrity of the collector and solarloop piping if it is exposed to extended periods ofdisuse or persistent hard freeze conditions below- 50° Fahrenheit. See Section 7, page 13 forinstructions.

3) INSTALLATION REQUIREMENTS – GENERAL

3.1 The contractor shall obtain all required per-mits and approvals.

3.2 The installation shall conform to all federal,state, and local regulations, codes, ordinances,and standards governing the installation of solarwater heating systems. The contractor shalladhere to sound building safety and trade prac-tices. Special consideration must be given tobuilding code requirements for the penetrationof structural members and fire rated assemblies.

3.3 The solar collector must be located in astructurally sound area of the roof that will beunshaded for the majority of the day all yearround. Adjacent buildings and trees should bechecked for possible shading. An instrumentsuch as the Solar Pathfinder can be used for siteanalysis. See http://www.solarpathfinder.com

3.4 Before installation the contractor shallinspect the condition of the roof and notify thehomeowner of any existing roof damage or nec-essary repairs.

3.5 The homeowner and contractor shall con-firm the location of all roof and ground mountedcomponents in advance of the installation.

4) INSTALLATION REQUIREMENTS – SPECIFIC

4.1 Collector Orientation

The performance of solar water heating systemsin the Northern Hemisphere is optimized whenthe collector is mounted facing True South.Performance, however, suffers very little whenthe collector is oriented no more than 45° East orWest of True South.

If your collector must be oriented East of 135° ofTrue or West of 225° of True, you should consid-er either adding collector area, i.e. using more orlarger collectors, or specifying SunEarth’s highperformance black chrome absorber plates.(Empire models EC or Imperial models IC)

The collector should be unshaded by any perma-nent obstacle from 9:00 a.m. to 3:00 p.m. everyday of the year.

4.2 Collector Tilt

Optimal annual efficiency is achieved by tiltingthe solar collector at an angle that equals yourlatitude plus an additional 10 degrees. This tiltangle favors the lower winter sun when collectorperformance is at its lowest and minimizes over-heating during the hottest summer months.

The minimum acceptable tilt angle from hor-izontal is 25°.

4.3 Basic Mounting Procedures

The SunEarth solar collector in your CascadeDrainback solar system must be mounted in avertical orientation parallel to the slope of theroof. See Figure 1, page 2. This orientationallows the internal riser tubes to rapidly drainwhen the circulation pump shuts off. Both thecollectors and the solar loop piping must besloped to drain back to the CopperStorreservoir. The minimum required slope is1/4" per foot of horizontal piping run. Usethe steepest slope possible on the returnline piping to the CopperStor reservoir.

The collector should be mounted as close to thestorage tank as possible to minimize heat loss inthe piping runs. If the home has attic access,mounting the collectors near the roof peak pro-vides for additional attic workspace. The solarcollector should be mounted on the roof inaccordance with these general principles:

4.3.1 The most important structural considera-tion is to securely anchor the solar collector andthe "Solar Strut"mounting hardware to thestructural members of the roof (i.e. rafters) withstainless steel hanger or lag bolts. The solar col-lector must be attached to the mounting hard-ware as detailed in Figures 2 - 8.

4.3.2 The collector must be raised from the roofsurface to allow for rainwater and debris to passunder the collectors and for proper ventilation ofthe roofing material. Provide no less than 1" ofclearance between the roof surface and the bot-tom of the solar collectors.


4.3.3 In selecting mounting hardware and fas-teners it is extremely important to avoid galvaniccorrosion resulting from the direct contact ofincompatible metals. Use SunEarth anodizedaluminum "Solar Strut" mounting hardware andstainless steel lag or hanger bolts, lock washersand round washers. In climates subject to severewinters or high humidity the use of galvanizedfasteners is prohibited.

4.3.4 The most important roofing considerationis to preserve the integrity of the water proof roofmembrane. Ensure that all roof penetrationsrequired to plumb and mount the solar collectorare properly flashed and sealed in accordancewith standard roofing practices. A urethane caulksuch as Sikaflex 1a is recommended for sealingroof penetrations. Tremco "POLYroof" elas-tomer coating is also acceptable. Silicones androofing tars tend to dry out over time andbecome susceptible to cracking.


fig.2

SHINGLE ROOF MOUNTING DETAIL

fig.4

TILE ROOF MOUNTING DETAIL

fig. 3

COMPOSITION SHINGLE MOUNTING DETAIL

fig.5

TILE ROOF MOUNTING DETAIL


4.3.5 If the region is subject to hurricane condi-tions, additional steps may be required to securethe collector and mounting hardware to thestructural members. In certain areas of the coun-try, local building codes may require collectorwind load testing or prescribe specific mountingprocedures. Consult your local building depart-ment.

4.4 Solar Loop Pipe Insulation

The solar loop piping must be well insulated witha high quality flexible closed cell insulation to min-imize heat loss. The wall thickness of the pipeinsulation should not be less than 3/4". One inch(1") is recommended. When it comes to pipeinsulation the rule is simple: thicker is better. Thespecified insulation material is Rubatex Insul-Tube180 or equal.

To the extent possible, slide the insulation materi-al over the pipe without cutting or taping. All buttjoints must be sealed with contact adhesive. Theuse of rigid polyethylene pipe insulation is prohib-ited. The temperatures generated by your collec-tor in the summer months or under stagnationconditions can melt this type of material.

Any above ground exterior pipe insulation is sub-ject to UV degradation and must be wrappedwith foil tape or painted with two coats of highquality water-based acrylic resin coating as sup-plied by the insulation manufacturer. Rubatex UVProtective Coating or equal is the required coatingmaterial.

fig.6

fig.8

TILT MOUNT STANDOFF DETAIL

fig. 7

TILT MOUNT DETAILFLUSH MOUNTING DETAIL

4.5 Collector Plumbing

SunEarth requires the use of all copper and brassfittings in the collector and solar loop plumbing.

Couplings or brass unions should be used to jointhe collectors in a two panel system. Use onlylead-free solder. Engelhard Silvabrite 100 orequal is required. Use of 50/50 lead solder isexpressly prohibited. Use of galvanized steel,CPVC, PVC, or any other type of plastic pipe isprohibited.

To ensure proper drainage of the collector arrayand solar loop piping the lines must be ade-quately sloped to drain back to the CopperStorreservoir. The required slope is 1/4" per footof horizontal run. Failure to properly orientthe collector and solar loop piping to allowfor adequate drainage may result in freezedamage. The SunEarth solar collector in notwarranted against freeze damage.

The solar loop piping from the collectorarray must no less than 3/4" T-M copper pip-ing to prevent air locks in the array and toensure proper drainage.

Figure 10 illustrates correct and incorrect meth-ods of plumbing the solar collector array. Notethat water will trap in the "U" section of pipingas illustrated in the drawing marked incorrectthus making it susceptible to freeze damage.

All vertical piping between the storage tank andthe collector shall be supported at maximumintervals of ten feet (10’). All other piping shouldbe supported every five feet (5) to prevent sag-ging. Copper plumbers tape or tube strap isrequired. The pipe insulation may not be com-pressed or crimped by the strapping material.

The installation of all horizontal and vertical pip-ing may not reduce the performance or rating ofany structural member or fire rated assembly.Adhere to all applicable local codes and ordi-nances.

4.6 Collector Sensor Placement

The collector sensor must be located on the hotwater return line as close to the collector as pos-sible. Sensors are typically accurate to +/- 1/2° F ifproperly installed and weatherized. To maximizesensor accuracy, attach the flanged portion of thesensor to the SunEarth collector header pipe witha stainless steel hose clamp. Wire nuts used toconnect the sensor and low voltage wiring shallbe all plastic, sealed with silicone and thoroughlywrapped in electrician’s tape. The copper sensorhead must be placed under the rubber pipe insu-lation covering the collector header. Thoroughlywrap and weatherize the insulation with electri-cian’s tape or insulation tape as provided by themanufacturer (Rubatex Insul-Tape or equal). SeeFigure 11 for collector sensor installation detail.


COLLECTOR PLUMBING

fig.9

fig.10

4.7 Low Voltage Wiring

The low voltage wiring used to connect the sen-sors to the controller should be a minimum18AWG. The wiring should be bare or tinned cop-per, two conductor, PVC insulated, with a PVCUV rated gray jacket suitable for exterior use. UseEastman Wire & Cable No. 5704, Belden Wireand Cable No. 8461 or equal.

4.8 Choosing and Installing the CopperStorDrainback Reservoir

SunEarth manufactures three different sizeddrainback tanks. Select the appropriate tankbased on the collector(s) chosen and the totallength of solar supply and return loop piping inthe system. Table 1 and Table 2 indicate theproper drainback tank for the two most commonpiping scenarios. Our preference is to use Table 1,1/2” piping for the supply line and 3/4” pipingfor the return line. This provides some flowrelated benefits, extends the allowable pipe runand is slightly less expensive.

The CopperStor drainback reservoir is designedto be wall mounted in a conditioned spaceusing a SunEarth CopperStor wall mount brack-et. It also may be supported by hooks screwedinto wall joists or with masonry bolts if installedon a basement wall. The outlet of theCopperStor drainback tank should be at least48" above the suction side of the circulatingpump (See Figures 13 and 14). The solar loopreturn fitting on the Ruud/Rheem heat exchangetank is 30" from the bottom of the tank. In anideal installation the Copperstor outlet piping willbe at least 18" above the tank fitting.

Table 1. Pipe run lengths for 1/2" supply and3/4" return line.

Table 2. Pipe run lengths for 3/4" supply andreturn lines.

The CopperStor reservoir is factory insulated toprovide both heat retention and a noise bufferagainst the sound of falling water.

If your Cascade Drainback system includes aflowmeter it should be plumbed so that the topof the flowmeter is level with the top of thetubes in the CopperStor unit. The top and bot-tom of the flowmeter should be supported torelieve stresses on the connecting unions. Use aBlue White model F-450LHB flowmeter or equal.

DO NOT install the pressure relief valve (PRV) onthe CopperStor reservoir at this time. The PRV isthreaded in place after the solar loop piping hasbeen filled with water. See Section 4.13 forinstructions on charging the system.

4.9 Installing the Solar Storage Tank andAncillary Components

When plumbing the Ruud/Rheem solar storagetank and Copperstor drainback reservoir makesure that all the components are accessible andeasy to reach. Ensure that there is clear access tothe storage tank, circulating pump, CopperStordrainback reservoir, mixing valve, flowmeter andother key components. If a component in thepotable water side of the system may requirefuture service or maintenance make the connec-tions with brass unions. Use only brass nipples


COLLECTOR SENSOR PLACEMENT

fig.11

Array DB 5.0 DB 7.5 DB 10.0

1 EP/EC-40 61 103 144

2 EP/EC-21 57 98 140

2 EP/EC-32 54 96 138

2 EP/EC-32 46 88 130

Array DB 5.0 DB 7.5 DB 10.0

1 EP/EC-40 82 138 194

2 EP/EC-21 76 132 188

2 EP/EC-32 73 129 185

2 EP/EC-32 62 118 174


and unions and copper and brass fittings inplumbing the solar storage tank and expansiontank. The use of galvanized fittings or nipples,CPVC, PVC or other plastic pipe is prohibited.

In two tank installations the isolation ball valvesBV2, BV3 and BV4 must be plumbed in the prop-er orientation. Plumb BV3 and BV4 in a verticalorientation above the solar storage tank. BV2must be plumbed horizontally with the valvehandle on the side and not the top of the valve.

Hard copper connections to the city cold watersupply line and the home hot water feed lines arerecommended. The gaskets in standard waterheater flex hose connectors can become brittleand compressed over time and begin leaking onthe water heater. If not detected in a timelymanner even a small drip or leak may cause seri-ous damage to the tank’s electrical componentsor, in extreme cases, may cause the tank to leakfrom the outside in.

Tank plumbing is required to provide for the iso-lation of the solar storage tank from the city coldwater supply line by means of an isolating ballvalve (BV1).

Line thermometers shall be installed in the col-lector supply and return lines to allow for a sim-ple diagnostic check of proper system operation.The differential temperature between the twothermometers will be anywhere between 5°- 20°during the course of a sunny day. Compare thetemperature readings in the two line thermome-ters (T1 and T2).

In both single and double tank systems install athird thermometer (T3) on the hot water outletabove the solar storage tank.

The Cascade Drainback system requires a highhead, low flow circulating pump. SunEarth rec-ommends the Taco model OO9. The GrundfosUP26-96BF is the next best choice for this appli-cation.

The specified controller, the Goldline GL-30-LCO,may be equipped with an optional snap-in digitaltemperature display module. The Goldline TD-GLmodule can continuously display the solar tank orback-up water heater temperature readings aswell as the SunEarth collector temperature. If aGoldline TD-GL digital display module is added tothe system there is no need to install a ther-

mometer above the solar storage tank.

A pump throttling valve (BV5) must be located onthe discharge, or upstream, side of the pump toadjust the solar loop flow rate and to preventcavitation of the circulating pump. Cavitation isa fluid condition that can lead to pitting or otherdamage to the pump impeller.

A brass boiler drain (BD) must be installed at thelowest point in the system to allow for chargingthe solar loop piping and to serve as a drain valvefor manual draining and maintenance.

A high quality thermostatic mixing valve isrequired in all OG-300 certified systems andshould be plumbed in line with brass union con-nections for ease of future repair or replacement(MX). The specified mixing valve shall be theCash Acme model HGB 12 or equal and shallhave an operating range between 95° F and120° F.

WARNING: SCALDING CAN OCCUR WITHINFIVE SECONDS WHEN WATER TEMPERA-TURES APPROACH 140° F. DESPITE THEINSTALLATION OF A MIXING VALVE IN YOURCASCADE DRAINBACK SYSTEM, ALWAYSEXERCISE CAUTION WHEN OPENING A HOTWATER FIXTURE OR FAUCT IN YOUR HOME.

The 3/4" cold water supply line to the solar stor-age tank must be insulated with minimum 7/8"X 3/4" pipe insulation to a minimum distance of5’ behind the storage tank, or to the wall if clos-er than 5’.

The Ruud/Rheem solar storage tank with integralheat exchanger and auxiliary heating element,model no. RSPEHE-1 or 81V80HE-1, is the speci-fied storage tank in your Cascade Drainback sys-tem.

fig.12

TANK SENSOR PLACEMENT

Figures 13 and 14 detail the plumbing schemat-ics for single and two tank Cascade Drainbacksystems. A brief explanation of the main com-ponents and their function is found in Section 10below.

4.10 Tank Sensor Placement

Figure 12 shows the proper placement of thesolar storage tank sensor. Make sure the sensor issecured to the threaded stud on the storage tankwith a 10-24 stainless steel nut.

Thoroughly weatherize the wire connections inaccordance with the roof sensor detail asdescribed above. Replace the fiberglass insulationbatting and close the access cover.

4.11 Tank Insulation

SunEarth requires that the solar storage tankmust have a minimum insulation value of R- 20.Most solar storage tanks now come with R-16.7factory insulation. Conventional back-up elec-tric water heaters have insulation values


fig.13

SINGLE TANK SYSTEM SCHEMATIC

CASCADE DRAINBACKP.10

between R-12 and R-20. The R value expressesthe thermal conductivity of the insulation mate-rial. The higher the "R"value the more effectivethe insulation material is at preventing heat loss.Whereas solar storage tanks do not come withsufficient factory insulation to meet SunEarth’sinsulation specification, a supplemental insula-tion jacket also must be installed. We recom-mend an aluminum foil "bubble-pack" insula-tion material such as manufactured by Reflectix(or equal). When properly applied, the insula-tion jacket will increase the overall level of tankinsulation to R-22.

In two tank retrofit installations an insulationjacket also must be installed on the back-up

water heater. If your Cascade Drainback system isinstalled in a new home, SunEarth specifies thatthe conventional water heater in a two tank sys-tem have an insulation value of R-20 (Rheem82VR52-2, Ruud EVR52-2 or equal.

For best results, cut three 1" strips of material andaffix these to the top, middle and bottom of yourwater heater or storage tank with the manufac-turer’s tape. This space creates an air gap betweenthe heater and the insulation and prevents heatconduction. Wrap the material around the waterheater or storage tank and secure the seams withthe manufacturer’s tape. Make sure to fully insu-late the top of the heater. Cut around the nipplesand relief valve to ensure a tight custom fit.

fig.14

PLUMBING COMPONENT DIAGRAM

The storage tank should not be placed directly onan uninsulated floor or concrete slab. The tankshould be placed on a well insulated pad with aminimum R-value of 10. A 2" rigid polystyreneinsulation pad such as manufactured by FrostKing (or equal) is recommended.

4.12 Electrical Requirements

A properly licensed contractor must make the230 volt electrical connection to the water heateror solar storage tank and the optional electronictime switch. If your solar contractor is notallowed by law to make these connections con-sult a licensed electrician.

Never activate the circuit breaker controlling theelectrical heating element until the solar storagetank is completely filled with water. This will pre-vent "dry firing" of the heating element. Theelectrical heating element will be destroyedalmost instantaneously if not completely sub-merged in water when activated. Make sure thewater heater circuit breaker is off until the solarstorage tank is completely filled.

SunEarth specifies the use of the GoldlineControls model GL-30-LCO differential thermo-stat with a factory installed six foot line cord.One 115 volt outlet must be located near thesolar storage tank. Plug the Goldline Control


fig.15

ELECTRICAL COMPONENTS

into the outlet. The Taco circulation pump, alsowired, is plugged directly into the 115 volt recep-tacle located on the side of the Goldline control.A 230 volt hard-wired control and circulationpump may be substituted, but troubleshootingthe components in the future becomes more dif-ficult.

Goldline Controls also manufactures a very usefulsnap-in digital meter that works in conjunctionwith the GL-30-LCO control. The Goldline TD-GLdigital monitor is a good diagnostic tool and is arecommended system option.

4.13 Charging the System

Once the components have been plumbed it istime to fill the solar storage tank with water.

Proceed as follows:

4.13.1 Begin by opening the cold water isolationball valve to the solar tank (BV1). Allow trappedair to escape by opening a hot water tap in thehouse. After the tank is filled, inspect all thread-ed fittings and solder joints for leaks.

4.13.2 Fill the solar loop piping with water.Begin by connecting a washing machine hose tothe boiler drain (BD) located at the lowest pointin the system.

4.13.3 Open the boiler drain (BD) and begin fill-ing the system directly from a tap or by using autility pump. If your system has a flowmeter (FM)continue filling the solar loop piping until thewater level is visible in the flowmeter. When thewater rises to within 1" of the top of theflowmeter, close the boiler drain (BD). Install themandatory pressure relief valve (PRV) on top ofthe CopperStor reservoir.

4.13.4 If your system does not have a flowmeterattach a washing machine hose to the female fit-ting on top of the CopperStor reservoir using anappropriate hose to pipe fitting (3/4"Male HoseThread X 3/4" FIP). Place the other end of thehose in a basin drain or mid-size bucket. Openthe lower boiler drain (BD) and begin filling thesolar loop piping from a tap or by using a utilitypump. Continue filling the piping until waterflows from the upper hose into the basin or stor-age bucket. Close the boiler drain and install thePRV on the drainback reservoir.

4.13.5 At this point it is recommended to runwater through the system to remove any solderflux residue or other impurities that were intro-duced into the system during plumbing. Proceedby removing the cover from the -Goldline GL-30-LCO control and slide the System Test Switchto‘ON’. Allow the pump to circulate waterthrough the system for 15-20 minutes. Turn thecontroller back to the ‘OFF’ position.

4.13.5 Drain the cycled water out of the array byplacing the hose attached to the lower boilerdrain (BD) into a service drain or bucket. Openthe lower boiler drain and completely drain thewater from the system. CAUTION: THISWATER MAY BE EXTREMELY HOT!

4.13.6 Refill the system with water as outlined insections 4.12.2 and 4.12.3, or in 4.12.4

5) SYSTEM START-UP PROCEDURES

Throughout the installation procedures outlinedin Section 4, emphasis has been placed on theproper plumbing and wiring of the primary sys-tem components. The solder and threaded con-nections also have been visually inspected forleaks and the solar loop piping has been cleanedand charged. Having successfully completedthese tasks it is time to set your system to runautomatically.

Remove the cover of the Goldline control and setthe switch to the ‘ON’ position. Wait until youcan hear water flowing through the solar loopreturn piping from the collector. For systems thatinclude a flowmeter (FM), adjust the flow settingvalve (BV5) until the meter indicates that theflowrate through your SunEarth collector(s) con-forms to the specified GPM found in Table 3.

For systems without a flowmeter, place your earnext to the pump and listen for signs of cavita-tion. Cavitation sounds like sand runningthrough the pump and is caused by the implo-sion of small air bubbles hitting the pumpimpeller. Cavitation can dramatically reduce thelife of the pump and the flow setting valve (BV5)should be used to eliminate this condition. If youhear cavitation when the valve is wide open,slowly close the valve until the sound is gone.



TABLE 3

5.2 Now locate the Goldline control red rotaryswitch labeled ‘TURN ON’ and set it to 20°. Thissetting controls the required temperature differ-ence between the collector and storage tankbefore the circulating pump will turn on. The‘OFF’ differential is factory preset at 4° F. Nextlocate the red rotary switch labeled ‘HI LIMIT’ andset it to 150° F. This setting will limit the finishedtank temperature and prevent system overheating.

5.2.1 Activate the Goldline control by sliding theSystem Test Switch to the ‘AUTO’ position.Replace and secure the plastic cover. Your sys-tem is now set to run automatically wheneversolar energy can be collected.

6) TWO MODES OF SYSTEM OPERATION

Both single and double tank Cascade Drainbacksystems are designed to accommodate two sep-arate modes of operation. Your system can either(1) serve as a preheater to your conventionalelectric or gas water heater or (2) be bypassedentirely and run 100% on utility power duringinclement weather or when maintenance isrequired.

Single Tank Operating Instructions:

6.1 Solar Preheat: Leave the circuit breaker on toyour solar storage tank and set the tank thermo-stat to the lowest acceptable temperature set-ting. The electric resistance heating element willcome on only when the tank temperature fallsbelow the thermostatic set point. If the solarheated water entering the tank is warmer thanthe thermostatic set point, the electric heatingelement will not come on. If you have a waterheater timer, you may preset the timer to turnthe heating element on and off at specified timesthroughout the day if desired.

6.2 100% Utility Power: Leave the circuit break-er on to your solar storage tank and turn off thecirculation pump. Remove the plastic cover from

the Goldline control and slide the System TestSwitch from ‘AUTO’ to ‘OFF’. Replace the con-trol cover.

Two Tank System Instructions:

6.3 Solar Preheat: Follow the instructions for thesingle tank system for setting the thermostat andthe heating element for automatic operationIsolation ball valves (BV2, BV3, and BV4) shouldbe positioned with their handles in a vertical ori-entation. Valve BV2 will be closed and valves BV3and BV4 will be open.

6.4 100% Utility Power: Follow the instructionsfor the single tank system above. Isolation valves(BV2, BV3, and BV4) should be positioned withtheir handles in a horizontal orientation. ValveBV2 will be open and valves BV3 and BV4 will beclosed.

These instructions are predicted on plumbing theisolation ball valves BV3 and BV4 in a vertical ori-entation above the solar storage tank. BV2 mustbe plumbed in the horizontal orientation withthe valve handle on the side and not the top ofthe valve.

7) ISOLATING THE MAJOR COMPONENTSAND SYSTEM SHUT DOWN PROCEDURES

Your Cascade Drainback solar water heating sys-tem is designed so that the key components canbe easily isolated for emergency repairs or rou-tine maintenance. By shutting a single valve youcan isolate the entire system from the pressurizedcold water supply line (BV1). In the case of astorage tank or fitting leak immediately shut thisvalve and call your installation contractor forservice.

The collector loop can be quickly drained if a leakis detected or for routine maintenance. Slide theGoldline control System Test Swtich to the ‘OFF’position. Next, attach a hose to the lower boilerdrain (BD) and open the valve to drain the sys-tem. CAUTION: THIS WATER MAY BEEXTREMELY HOT!

In two tank systems the solar storage tank can beisolated from the back-up water heater. Set thevalve handles to the 100% utility power configu-ration as outlined above. By closing these valvesthe tank can be serviced or replaced. The opera-tion of the back-up water heater will not beaffected.

Collector Array Flowrate (GPM)

1 EP/EC-40 1.0

2 EP/EC-21 1.1

2 EP/EC-24 1.2

2 EP/EC-32 1.7

8) SUMMER VACATION RECOMMENDATIONSAND PROCEDURES

Solar water heating systems can build up veryhigh temperatures during summer months ifthere is no daily draw on the system. If a shortsummer vacation is planned the best way toavoid overheating in a drainback system is to setthe Goldline control System Test Switch to the‘OFF’ position. The pump will not circulate dur-ing the day and the system will not "gain" anyadditional heat.

For extended vacations of a month or moreSunEarth recommends that you cover the panelswith a suitable opaque material. Stagnation con-ditions can have an adverse effect on the internalcollector piping if the panel is left unprotected.SunEarth’s collector warranty specifically excludesstagnation conditions in excess of sixty days.

Remember to reset the Goldline control to the‘AUTO’ position upon your return.

9) MAINTENANCE AND TROUBLESHOOTING

The following simple procedures are intended tooptimize the performance of your CascadeDrainback solar water heating system and also toextend the life of the primary components.

9.1 It is important that the CopperStor reservoirremain full for proper system operation. To checkthe fluid level, slide the Goldline System TextSwitch to the ‘OFF’ position and allow the fluidin the array to drain into the CopperStor reser-voir. For systems installed with an optionalflowmeter, check to see that the fluid is not lessthan 1" from the top of the meter. If your sys-tem does not have a flowmeter, unscrew thepressure relief valve (PRV) and dip a woodendowel into the threaded copper fitting to checkthat the fluid level is not more than 6-8" belowthe valve fitting. If a small amount of fluid isneeded to bring the reservoir up to the properlevel, pour it directly into the PRV fitting port.Rewrap the male thread on the PRV with Teflontape and reinstall. You may also follow theinstructions in sections 4.12.2 and 4.12.3 or4.12.4 for charging the system if more water isrequired.

Please remember that over time you WILL losesome fluid in the solar loop piping. If the waterlevel is not properly maintained you may

do irreparable damage to your circulatingpump. Check you fluid levels at least oncea year.

9.2 The second most important component inyour system, at least from a longevity standpoint,is often ignored and never seen. We are referringto the sacrificial "anode rod" installed in yoursolar storage tank (ST1). Typically constructedfrom magnesium, anode rods are installed in"glass lined" water heaters and storage tanks toinhibit corrosion.

As the name implies, the "sacrificial" anode rodis consumed so that the tank lining is not. At acertain point in the process, the anode rod is nolonger completely effective and the corrosiveprocesses begin to eat away at the tank’s glasslining. In time the solar storage tank, like anyother gas or electric water heater, will begin toleak. The process is not reversible and the tankmust be replaced.

System temperatures and water quality affect therate at which the anode rod is consumed. In gen-eral, the higher the average system temperaturethe faster the rate of corrosion. By changing theanode rod after the fifth year of system opera-tion, and every three to five years thereafter, it ispossible to extend the life of the solar storagetank. Periodic replacement of the anode rod inyour solar storage tank can significantly extendthe tank life.

9.3 The solar storage tank also should beflushed annually to minimize sediment buildupon the bottom of the tank. If you live in an areawith high mineral content in your water, flush thetank on a semi-annual basis. Disconnect thepower to the solar tank at the circuit breaker ortime switch (if present) before flushing. Turn theGoldline control System Text Switch to the ‘OFF’position. In a two tank system it is not necessaryto disconnect the power to the electric waterheater in order to flush the solar tank.

Open the flush valve on the bottom of the stor-age tank and drain a sufficient volume of waterto eliminate the sediment. After the procedure iscomplete make sure the tank is completely full ofwater before restoring power to the thermostatand heating element. Turn Goldline controlSystem Text Switch to the ‘ON’ position.


9.4 If you live in a dusty climate it is beneficial towash off the dirt that settles on the collector glassonce a month. Clean glass allows the collector tomaintain a high level of thermal performance.

9.5 Check the exterior pipe insulation annuallyand patch or repair any exposed surfaces ordegraded areas. Repaint as necessary.

9.6 In the unusual instance of collector glassbreakage, the glass should be replaced immedi-ately. Do not allow moisture or debris to enterthe collector casing. Contact your installationcontractor to change the glass.

9.7 If you detect a water leak in the solar looppiping or tank plumbing, contact your installa-tion contractor for service.

9.8 If you do not have hot water on a sunny daycheck to see that the controller is set in the‘AUTO’ position. If the pump won’t run unplug itfrom the controller receptacle and plug it directlyinto a nearby 115 volt outlet. If the pump stilldoes not run it may need to be replaced. If thepump does run when plugged into the wall out-let then the problem is likely located in the con-trol or one of the two 10K ohm sensors. Contactyour installation contractor for service.

9.9 If you have a full tank of hot water beforebed and the solar storage tank is cold in themorning it is likely that either a sensor or theGoldline control has failed. Make sure that thecirculating pump is not running after 6:00 p.m. Ifthe pump is running and the control indictor light"Solar" #1 is on after 6:00 p.m., check both sen-sors to see that they calibrate to 10K ohm resist-ance at 77° F. If you find a defective sensorreplace it immediately. If the sensors are properlycalibrated contact your installation contractor tocheck the Goldline control.

Please note that in a two tank system nighttimeheat loss will be harder to detect, especially if youare operating in the solar preheat mode. If thecirculating pump is operating after 6:00 p.m. thewater going up to the collectors will be hotterthan the water returning to the solar storagetank. Follow the procedures in 9.9 above.

9.10 If the weather is poor and the auxiliaryheating element will not fire, the reset button onthe storage tank thermostat may have to bedepressed to be reset. NEVER REMOVE THE

ACCESS PLATE ON THE EXTERIOR OF THESOLAR STORAGE TANK OR CONVENTIONALELECTRIC WATER HEATER WITHOUT FIRSTDISCONNECTING THE 230 VOLT POWER SUP-PLY AT THE CIRCUIT BREAKER.

If the red reset button on the thermostat clickswhen depressed the heating element shouldimmediately fire when you reconnect the circuitbreaker. It you still do not have hot water afterone hour contact your installation contractor forservice. (In two tank systems the conventionalelectric water heater will be wired for electricalbackup. The solar tank will serve solely as a stor-age tank).

10) SOLARAY SYSTEM COMPONENT PARTS

See Figures 13 and 14 for the location of the spe-cific component numbered below.

SunEarth Solar Collector(s): Absorbs the sun’sheat energy and transfers this heat to the heatexchange fluid (water) circulating through thecollector.

Collector Sensor (S1): Wired to the Goldlinecontrol. Works in conjunction with the tank sen-sor to automatically turn your circulating pumpon and off at preset temperature differentials.

Line and Tank Thermometers (T1, T2, T3):Used to determine proper system operation. Linethermometers display the differential tempera-ture between the collector supply and returnlines on sunny days. In single tank systems thetank thermometer will read the temperature ofthe water after the mixing valve feeding your fix-tures. In two tank systems the thermometer willread the finished solar tank temperature.

Drain/Purge Valve (BD): Used to charge anddrain the solar loop piping.

Circulating Pump (P): Circulates water throughthe collector and solar loop piping.

Control (C): Automatically turns the circulatingpump on and off when there is sufficient heat tobe gained in the solar collector.

Tank Sensor (S2): Wired to your Goldline con-trol. Works in conjunction with the collector sen-sor to turn your circulating pump on and off atpreset temperature differentials.


Integral Heat Exchanger (IHX): Transfers heatfrom the solar collector loop to the potable waterin the solar storage tank. The heat exchanger isdouble walled and vented. If a leak in the heatexchanger piping occurs there is no possibilitythat the potable water in your solar storage tankcan be contaminated with the heat exchangefluid (water in this case) in the solar loop piping.

Mains Supply Line Isolation Valve (BV1):When open allows potable water to fill the solarstorage tank or back-up water heater. Whenclosed isolates the solar storage tank and back-up water heater from the pressurized city coldwater supply line.

Mixing Valve (MX): Automatically blends hotwater from the solar storage tank with incomingcity cold water to an acceptable set point. A mix-ing valve must be installed on every CascadeDrainback solar water heating system.

CopperStor Drainback Reservoir (DBT): Aninsulated hot-spun copper reservoir that holdsthe collector and solar loop piping heat exchangefluid (water) when the circulating pump (P) is off.

Pressure Relief Valve (PRV): Protects the col-lector and solar loop piping against pressure inexcess of 150 PSI.

Optional Flowmeter (FM): Monitors flowratethrough the collector and solar loop piping andalso serves as a sight gauge to determine systemfluid level. Although an optional feature, aflowmeter is highly recommended.

Solar Tank Bypass Valves (BV2-4): Allows thesolar tank (ST1) to be completely isolated andbypassed in the case of tank failure.

11) ESTIMATED COMPONENT LIFE

You can expect a long useful life from the pri-mary components in your Cascade Drainbacksolar water heating system by adhering to theroutine service and maintenance tips providedabove.

The SunEarth solar collector and CopperStordrainback tank have a design life of twenty-fiveto thirty years. The solar storage tank should lasttwelve to twenty years in most water qualityareas by periodically replacing the anode rod. Thecirculating pump and differential control typicallylast between twelve and fifteen years. Like EPA

mileage estimates for automobiles, these compo-nent design lives represent average figures fordrainback system components installed in theUnited States. The life of your components mayvary.

To obtain warranty service please contact yourinstallation contractor or SunEarth Inc. for thename of an authorized service agent near you.

12) CASCADE DRAINBACK SYSTEM MODEL NOS.

EPRD40-80 ECRD40-80

EPRD40-80-2 ECRD40-80-2

EPRD40-80-2G ECRD40-80-2G

EPRD42-80 ECRD42-80

EPRD42-80-2 ECRD42-80-2


EPRD48-80 ECRD48-80

EPRD48-80-2 ECRD48-80-2

EPRD48-80-2G EPRD48-80-2G

EPRD64-80 ECRD64-80

EPRD64-80-2 ECRD64-80-2


EXAMPLE: EPRD48-80

Empire Series Collector, Moderately SelectivePainted Absorber Coating, Ruud/Rheem HeatExchange Tank, Drainback Tank, 2 each Empire

EP-24 3’ X 8’ Collectors (48 ft2), 80 Gallon Tank.

- 2: Two tank system with back-up electric stor-age water heater

-2G: Two tank system with back-up gas waterheater

ECRD48-80: Designates SunEarth Empire seriescollector with black chrome over nickel absorbercoating.



13) SUNEARTH COPPERSTOR DRAINBACK TANKAND EMPIRE SERIES COLLECTOR SPECIFICATIONS

DB-5.0

DB-7.5

DB-10.0

SunE

arth

Mod

el N

o.

12

18

24

Wid

thIn

ches

5

5

5D

epth

Inch

es

50

50

50

Leng

thIn

ches

42

56

84

5.0

7.5

10.0

82

117

164

220

220

220

3/4

3/4

3/4

Dry

Wei

ght

(lbs)

Flui

d Ca

pacit

y(U

S ga

l)

Max

Pre

ssur

e(p

sig)

Conn

ectio

nPi

pe D

ia. (

in)

Wet

Wei

ght

(lbs)

Max. Temp of 210° F

BALANCE OF PAGE LEFT INTENTIONALLY BLANK

THEEMPIRE SERIESGLAZED FLAT PLATE SOLAR COLLECTORS

Models EC and EP SPECIFICATION SHEET

PROTECTING OUR ENVIRONMENT—SINCE 1978

• EPDM Grommets

• Black Chrome orModerately Selective Black PaintAbsorber Coating

• Copper Absorber Plate

• Type M Copper RiserTubes and Manifolds

• Secondary SiliconeGlazing Seal

• Primary EPDM Glazing Seal

• Low Iron Tempered Glass

• Vent Plugs

• Riveted Corners

• Painted Aluminum Backsheet

• Rigid Foam Insulation

• Low-Binder Fiberglass Insulation

• Extruded AnodizedAluminum Casing and Capstrip

• Stainless Steel Fasteners

• 15% Silver Brazed Joints

THE VALUE LEADERIN SOLAR WATER HEATING TECHNOLOGY

ENGINEERING SPECIFICATIONS

EMPIRE SERIES SPECIFICATIONS

(Performance specifications subject to testing error of +/- 3%)

The following shall be the specifications for the solar collectors. Collectorsshall be SunEarth Empire model ________, and shall be of the glazed liq-uid flat plate type. Collectors shall be tested in conformance with ASHRAE93-1986, and SRCC 100-81. The collectors also shall be certified by theSRCC and the Florida Solar Energy Center (FSEC).GENERALThe dimensions of the collector shall be _________ inches in length,_________ inches in width and 3 1/4 inches in depth. The collector casingshall be an anodized aluminum extrusion (alloy 6063 T5), minimum thick-ness .060 inch, with an architectural dark bronze finish. The casing shallhave notched framewalls for ease of plate removal and reinstallation. Sheetmetal screwed fasteners shall be stainless steel (18-8 #10). The backsheetshall be painted textured aluminum not less than .014 inch thickness. A 1inch vent plug shall be installed in each of the four corners of the backsheetto minimize condensation.GLAZINGThe collector glazing shall be one sheet of low iron tempered glass, witha minimum of 1/8 inch thickness (5/32 inch on EP/EC 40), and a mini-mum transmissivity of 91 percent (89 on EP/EC 40). The glazing shall bethermally isolated from the casing by a continuous EPDM gasket. Thereshall be a continuous secondary silicone seal between the glass and cas-ing capstrip to minimize moisture from entering the casing.INSULATIONThe insulation shall be foil-faced polyisocyanurate foam sheathing board ofa minimum 1 inch thickness, siliconed in place to the aluminum backsheet,covered by low-binder fiberglass of a minimum 1 inch thickness, providing

thermal isolation of the foam from the absorber plate. Total thermal resis-tance shall be a minimum of R-12. The sides and ends of the collector shallbe insulated with a minimum of 1 inch foil-faced polyisocyanurate foamsheathing board.ABSORBER PLATE AND PIPINGThe absorber shall consist of a roll-formed copper plate of no less than .008inch thickness. Risers shall be a minimum of 1/2 inch O.D. Type M coppertubing on no more than 4 1/2 inch centers continuously soldered to theplate utilizing a non-corrosive solder paste with a melting point of 460

oF.

The risers shall be brazed to 1 1/8 inch O. D. Type M copper manifolds uti-lizing a copper phosphorous brazing alloy with no less than 15 percent sil-ver content, and conforming to the American Welding Society’s BCuP-5 clas-sification. EPDM grommets shall isolate the manifold from the aluminumcasing. The absorber plate shall be designed for 160 psig maximum oper-ating pressure.ABSORBER COATING AND PERFORMANCE CURVEA) Black Chrome (EC Series): The absorber coating shall be black chrome onnickel with a minimum absorptivity of 95 percent and a maximum emissiv-ity of 12 percent. The instantaneous efficiency of the collector shall be aminimum Y-intercept of 0.714 and a slope of no less than -0.7271(BTU/ft2–hr)/F.

B) Moderately Selective Black Paint (EP Series): The absorber coating shall bea moderately-selective black paint with a minimum absorptivity of 94 per-cent and a maximum emissivity of 56 percent. The instantaneous efficiencyof the collector shall have a minimum Y-intercept of 0.682 and a slope ofno less than -0.7995 (BTU/ft2–hr)/F.

Specifications subject to change without notice.

8425 Almeria Ave. • Fontana, CA 92335(909) 434-3100 • Fax (909) 434-3101

MANUFACTURED BY: AVAILABLE FROM:

ES

9401

VALE

NTIBROTHERS GRAPHIC

S

•FU

L LS E R V I C E P R IN

T E R S•

MODEL EPTHERMAL PERFORMANCE RATINGS*MODEL EC

Category(Ti-Ta) CLEAR

DAYMILDLY

CLOUDY DAYCLOUDY

DAY

A(-9oF)

B(9oF)

C(36oF)

D(90oF)

E(144oF)

1,284

1,169

984

619

280

971

854

677

343

62

659

542

372

89

-

Category(Ti-Ta) CLEAR

DAYMILDLY

CLOUDY DAYCLOUDY

DAY

A(-9oF)

B(9oF)

C(36oF)

D(90oF)

E(144oF)

1,332

1,218

1,040

699

390

1,005

890

720

405

137

680

565

402

127

-

A-Pool Heating (Warm Climate) B-Pool Heating C-Water Heating (Warm Climate) D-Water Heating (Cool Climate) E-Air Conditioning/Industrial Process Heat.Thermal performance is obtained by multiplying the collector output for the appropriate application and insolation level by the total gross collector area.*Collector ratings are derived from the Solar Rating & Certification Corp (SRCC) Document RM-1 and Standard OG-100.

Btu/ft2/Day

Ti = inlet fluid tempTa = ambient air temp

Btu/ft2/Day

Ti = inlet fluid tempTa = ambient air temp

EC/EP21

EC/EP24

EC/EP32

EC/EP40

EC/EP40-1.5

40

36 1/8

48 1/8

48 1/8

48 1/8

76

98 1/4

98 1/4

122 1/4

122 1/4

3 1/4

3 1/4

3 1/4

3 1/4

3 1/4

21.12

24.61

32.79

40.81

40.81

18.70

21.88

29.81

37.33

37.33

70

80

106

141

150

71.25

93 5/8

93 5/8

115 5/8

115 5/8

0.72

0.78

1.00

1.20

1.61

0.54

0.62

0.83

1.04

1.04

160

160

160

160

160

43 3/8

39 3/4

51 3/8

51 3/8

51 3/8

1

1

1

1

1 1/2

Wid

thIn

ches

Leng

thIn

ches

Dept

hIn

ches

Gros

s Are

aSq

Ft

Net A

pertu

reSq

Ft

Dry W

eight

,Lb

s.

Head

er, C

ente

rto

Cen

ter,

Inch

es

Fluid

Cap

acity

U.S.

Gallo

nsDe

sign

Flow

Rate

GPM

Max

imum

Ope

ratin

g Pr

ess

PSIG

SunE

arth

Mod

el No

.

Std.

Hea

der

Wid

th, I

nche

sSt

d. H

eade

rDi

amet

er, In

ches

Nom

inal

Max

Flo

wRa

te G

PM

12

12

12

12

25

0.003

0.005

0.006

0.009

0.006

Pres

sure

Dro

pat

Des

ign

Flow

Rate

in P

SIG

R E C Y C L E D P A P E R — S O Y B A S E D I N Kwww.sunearthinc.com


14) A NOTE ON COMPONENT WARRANTIES

The Cascade Drainback solar water heating system is comprised of a number of component parts. Manyof these components are manufactured by other companies, e.g. Rheem/Ruud, Taco, Grundfos orGoldline and carry specific warranty coverage as provided by the maker. Product warranty statementsfor these components are available from your installation contractor. SunEarth’s warranty coverage islimited only to those components it directly manufactures. The following Product Warranty Statementdefines SunEarth’s coverage for the solar collectors and the CopperStor drainback reservoir.

15) SUNEARTH PRODUCT WARRANTY STATEMENT

See Cascade Drainback manual pages 21 - 22.

BALANCE OF PAGE LEFT INTENTIONALLY BLANK

8425 Almeria Ave. • Fontana, CA. 92335

Phone: (909) 434-3100 • Fax: (909) 434-3101

email: [email protected] • www.sunearthinc.com

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