TESTING METHOD - TAHI THERMOSTATIC MIXER VALVE (1 and …
2
TESTING METHOD - The valve should be tested to ensure correct operation at commissioning and thereafter at intervals no greater than 12 months. Notes: The testing will only require a normal thermometer with a ● scale greater than 65°C. The temperature sensitive element of the thermometer should always be fully inserted into the water flow. Temperature readings should be taken at the normal flow rate ● after allowing for the system to stabilise. If the Tahi thermostatic mixing valve has been adjusted ● or serviced it must be re-commissioned and re-tested in accordance with these instructions. When commissioning/testing is due the following performance checks shall be carried out: Measure the mixed water temperature and record. 1. The testing will only require a normal thermometer with a 2. scale greater than 65°C. The temperature sensitive element of the thermometer should always be fully inserted into the water flow. Carry out a cold fail/safe shut-off test by using the isolation 3. valve to shut off the water to the cold supply. Wait 5 seconds, if water is still flowing check that the water 4. temperature is below 46°C. The flow should stop or reduce to a trickle. Open cold water isolation valve and measure mixed water 5. temperature. Notes: If there is no significant change to the set outlet temperature ● (±2°C or less change from the original settings) and the fail- safe shut off is functioning, then the valve is working correctly and no further service work is required. If the outlet temperature has drifted by more than 2°C, or ● if the fail/safe function does not work, a full service or re- commissioning is required. If there is a residual flow during the commissioning or the ● annual verification (cold water supply isolation test), then this is acceptable providing the temperature of the water seeping from the valve is no more than 2°C above the designated maximum mixed water outlet temperature setting of the valve. Temperature readings should be taken at the normal flow rate ● after allowing for the system to stabilise. The sensing part of the thermometer probe must be fully ● submerged in the water that is to be tested. Any TMV that has been adjusted or serviced must be ● re-commissioned and re-tested in accordance with the manufacturers’ instructions. Water Supply (Water Fittings) Regulations 1999 This valve complies with the requirements of the above Regulations and installation should be carried out in strict compliance with them. OPERATING CONDITIONS OF USE - Before installation the operating conditions of use must be checked. Table 1 contains details of the necessary conditions of operation. If your water supply cannot meet these conditions then the valve cannot be guaranteed to operate as a Type 2 valve. This valve is suitable for use in HP (BS 1111) operating conditions. Operating pressures above 5.0 Bar will require the installation of a pressure reducing valve. Operating Conditions of Use BS1111 Maximum Static Pressure 10 bar Flow pressure (Hot & Cold) 0.5 bar – 5 bar* Hot Supply Temperature 55 - 65 °C Optimum Hot Supply Temperature 60 - 65 °C Cold Water Supply Temperature 5 – 25 °C Pressure Designation of Use HP* S/BT Maximum Allowable Outlet Temperature 46 °C Installation Type Concealed Max Dynamic Pressure Ratio (Hot to Cold OR Cold to Hot) 3.5 : 1 Minimum Temperature Differential Between Either Supply and Outlet Temperature 12 °C Table 1. Operating Conditions of use * If a water supply is fed by gravity then the supply pressure should be verified to ensure the conditions of use are appropriate for the valve. RECOMMENDED OUTLET TEMPERATURES - Shower 41 °C The mixed water temperature at the terminal fitting must never exceed ● 46 °C The maximum mixed water temperature can be 2°C above the ● recommended maximum set outlet temperatures. It is not a safe bathing temperature for adults or children. The British Burns Association recommends 37 to 37.5°C as a comfortable bathing temperature for children. In premises covered by the Care Standards Act 2000, the maximum mixed water outlet temperature is 43°C. TAHI THERMOSTATIC MIXER VALVE INSTALLATION - The Tahi thermostatic mixer valve is precision engineered and will give ● continuous safe and controlled performance providing it is installed, commissioned and maintained according to the instructions contained in this document. The valve must be so installed that it is readily accessible for ● commissioning and maintenance when being installed in accordance with TMV2. The valve is fitted with integral “listed” single check valve cartridges ● which command the water supply; therefore the thermostatic valve is protected against cross-flow due to unbalanced line pressures as required by the Water Supply (Water Fittings) Regulations 1999. The valve must be installed with isolation valves on both the hot and cold ● water supplies as close as possible to the valve; so as to allow the valve to be commissioned and tested correctly. The fitting of strainers is recommended as close as is practicable to the ● water supply inlets of the thermostatic mixing valve. (Recommended maximum mesh aperture of 0.02”). TAHI THERMOSTATIC MIXER VALVE (1 and 2 outlets) INSTALLATION AND MAINTENANCE INSTRUCTIONS FOR COMPLIANCE TO THE TMV2 SCHEME Issue B 435027 Methven warrants this product against manufacturing defects and that it is suitable for use under the operating conditions specified in this instruction sheet. For your warranty please refer to www.methven.com or call Customer Service New Zealand 0800 804 222 Australia 1300 638 483 UK 0800 195 1602 Check non-return valve function. Check strainers around cartridge for blockage. Check non-return valve function. Check limit settings (Refer commissioning). Check Strainer around cartridge for blockage. 7 operate. screws (A). Screws tight only Check installation depth is within manufacturers stated limits (refer step 1) A. FAULT FINDING FLOWCHART
Transcript of TESTING METHOD - TAHI THERMOSTATIC MIXER VALVE (1 and …
TESTING METHOD -
The valve should be tested to ensure correct operation at commissioning and thereafter at intervals no greater than 12 months.
Notes:
The testing will only require a normal thermometer with a●scale greater than 65°C. The temperature sensitive element ofthe thermometer should always be fully inserted into the waterflow.
Temperature readings should be taken at the normal flow rate●after allowing for the system to stabilise.
If the Tahi thermostatic mixing valve has been adjusted●or serviced it must be re-commissioned and re-tested inaccordance with these instructions.
When commissioning/testing is due the following performance checks shall be carried out:
Measure the mixed water temperature and record.1.
The testing will only require a normal thermometer with a2.scale greater than 65°C. The temperature sensitive element ofthe thermometer should always be fully inserted into the waterflow.
Carry out a cold fail/safe shut-off test by using the isolation3.valve to shut off the water to the cold supply.
Wait 5 seconds, if water is still flowing check that the water4.temperature is below 46°C. The flow should stop or reduce toa trickle.
Open cold water isolation valve and measure mixed water5.temperature.
Notes:
If there is no significant change to the set outlet temperature●(±2°C or less change from the original settings) and the fail-safe shut off is functioning, then the valve is working correctlyand no further service work is required.
If the outlet temperature has drifted by more than 2°C, or●if the fail/safe function does not work, a full service or re-commissioning is required.
If there is a residual flow during the commissioning or the●annual verification (cold water supply isolation test), then thisis acceptable providing the temperature of the water seepingfrom the valve is no more than 2°C above the designatedmaximum mixed water outlet temperature setting of the valve.
Temperature readings should be taken at the normal flow rate●after allowing for the system to stabilise.
The sensing part of the thermometer probe must be fully●submerged in the water that is to be tested.
Any TMV that has been adjusted or serviced must be●re-commissioned and re-tested in accordance with themanufacturers’ instructions.
Water Supply (Water Fittings) Regulations 1999
This valve complies with the requirements of the above Regulations and installation should be carried out in strict compliance with them.
OPERATING CONDITIONS OF USE - Before installation the operating conditions of use must be checked. Table 1 contains details of the necessary conditions of operation. If your water supply cannot meet these conditions then the valve cannot be guaranteed to operate as a Type 2 valve. This valve is suitable for use in HP (BS 1111) operating conditions.
Operating pressures above 5.0 Bar will require the installation of a pressure reducing valve.
Operating Conditions of UseBS1111
Maximum Static Pressure 10 bar
Flow pressure (Hot & Cold) 0.5 bar – 5 bar*
Hot Supply Temperature 55 - 65 °C
Optimum Hot Supply Temperature 60 - 65 °C
Cold Water Supply Temperature 5 – 25 °C
Pressure Designation of Use HP* S/BT
Maximum Allowable Outlet Temperature 46 °C
Installation Type Concealed
Max Dynamic Pressure Ratio (Hot to Cold OR Cold to Hot)
3.5 : 1
Minimum Temperature Differential Between Either Supply and Outlet Temperature
12 °C
Table 1. Operating Conditions of use
* If a water supply is fed by gravity then the supply pressure should be verified to ensure the conditions of use are appropriate for the valve.
RECOMMENDED OUTLET TEMPERATURES -
Shower 41 °C
The mixed water temperature at the terminal fitting must never exceed ●46 °C
The maximum mixed water temperature can be 2°C above the ●recommended maximum set outlet temperatures.
It is not a safe bathing temperature for adults or children.
The British Burns Association recommends 37 to 37.5°C as a comfortable bathing temperature for children. In premises covered by the Care Standards Act 2000, the maximum mixed water outlet temperature is 43°C.
TAHI THERMOSTATIC MIXER VALVE INSTALLATION - The Tahi thermostatic mixer valve is precision engineered and will give ●continuous safe and controlled performance providing it is installed, commissioned and maintained according to the instructions contained in this document.
The valve must be so installed that it is readily accessible for ●commissioning and maintenance when being installed in accordance with TMV2.
The valve is fitted with integral “listed” single check valve cartridges ●which command the water supply; therefore the thermostatic valve is protected against cross-flow due to unbalanced line pressures as required by the Water Supply (Water Fittings) Regulations 1999.
The valve must be installed with isolation valves on both the hot and cold ●water supplies as close as possible to the valve; so as to allow the valve to be commissioned and tested correctly.
The fitting of strainers is recommended as close as is practicable to the ●water supply inlets of the thermostatic mixing valve. (Recommended maximum mesh aperture of 0.02”).
TAHI THERMOSTATIC MIXER VALVE (1 and 2 outlets) INSTALLATION AND MAINTENANCE INSTRUCTIONS FOR COMPLIANCE TO THE TMV2 SCHEME
Issue B435027
Methven warrants this product against manufacturing defects and that it is suitable for use under the operating conditions specified in this instruction sheet.
For your warranty please refer to www.methven.com or call Customer ServiceNew Zealand0800 804 222
Australia1300 638 483
UK 0800 195 1602
Check non-returnvalve function.
Check strainersaround cartridge for
blockage.
Check non-returnvalve function.
Check limit settings (Refer
commissioning).
Check Straineraround cartridge for
blockage.
7
operate.
screws (A). Screws
tight only
Check installationdepth is within
manufacturers statedlimits (refer step 1)
A.
FAULT FINDING FLOWCHART
Remove screw. Do not discard.
Rotate temperature A. stop fully anti-clockwise
If temp ≤ 46°CB. If temp > 46°C
Adjust (see commissioning)
COMMISSIONING -
The Tahi thermostatic mixer valve is factory set to the required temperature. Check the valve after installation to ensure it operates at the correct outlet temperature.
Prior to commissioning the Tahi thermostatic mixing valve check the following:
The designation of the thermostatic mixing valve matches the application. ●
The supply pressures are within the valves operating range. ●
The supply temperatures are within the valves operating range. ●
Isolating valves (and strainers preferred) are installed. ●
REMOVE MAXIMUM TEMPERATURE STOP
Remove screw. A. Do not discard.
Rotate clockwise B. until water temp = 38°C
NOTE - Use of supply line or zone strainers is strongly recomended.
1
MOUNT PARALLEL TO WALL LINING
2
P < 1000 kPa/10 bar(Test pressure must not exceed 1000 kPa/10 bar)
CHECK WATERTIGHTNESS
3 FIT WALL LINING AND REMOVE DUST COVER
USE PROVIDED TEMPLATE FOR ACCURATE HOLE DIMENSIONS.
6mm
MAX
6mm MAX
4
Wall lining
Tiles
TRIM FLUSH AND SEAL WITH SILICON
5 CHECK MAX OUTLET TEMPERATURE
6 FIT TRIM COMPONENTS
7 SET WATER TEMP TO 38°C
8 ASSEMBLE DIAL GUIDE AND DIAL
Dialguide
Dial
DOWNWARD ORIENTIATION OF BUTTON CRITICAL
9 ASSEMBLE HEIGHT ADJUSTOR
Hold dial A. hard against faceplate.
Wind depth B. adjustor into dial. Stop when you feel dial starting to push away from the faceplate
Faceplate
Depth adjustor
8mm Allen key
Dial
If depth adjustor C. protrudes past the front face of the dial; Remove the depth adjustor and trim at midpoint (cut in half). Reassemble as per steps 9: A and B
10Insert and tighten A. screw using 2.5mm Allen key (finger tight only) to fix dial position.
Fit cap (force B. required)
Tip: Insert dot end of cap first
HOLD DIAL TO STOP ROTATION WHILST TIGHTENING.
FIT DIAL CAP
Note: Dot orientation on dial cap is at top (opposite dial button).
1
2TEMPERATURE MUST NOT EXCEED 46°C
ADJUST TEMPERATURE TO DESIRED MAXIMUM.
3 REASSEMBLE MAXIMUM TEMPERATURE STOP
Assemble with faces aligned as shownNote: Do not Rotate cartridge control knob while assembling Maximum temperature stop
Maximum temperature stop
x 2 (long screws)
x 2 (short screws)
x 2 (Allen screws)
VERT
ICA
L
=
=
96-116mmOPTIMUM = 106mm
= =
PARALLEL
MOUNT MIXER BODY IN WALL CAVITY
NOTE - Levers to be inserted from bottom as shown in diagrams A and B
NOTE - Locating feature
Trim
Depth Adjustor
Dial
Maximum temperature stop
Cartridge control knob
Wall lining
Wall lining
A. B.
