Heating & Cooling Circuit

Empfohlen wird auf dem Titel der Einsatz eines vollflächigen Hintergrundbildes (Format: 25,4 x 19,05 cm):• Bild auf Master platzieren (JPG, RGB, 144dpi)• Bild in den Hintergrund legen

Empfohlen wird auf dem Titel der Einsatz eines vollflächigen Hintergrundbildes (Format: 25,4 x 19,05 cm):• Bild auf Master platzieren (JPG, RGB, 144dpi)• Bild in den Hintergrund legen

Confidential / Copyright © Siemens Schweiz AG 2006

Heating & Cooling Circuit

OEM Boiler & Burner EquipmentNov 2006

Seite 2 Nov 2006 Building Technologies / HVAC ProductsMarkus Herger

RVS – Heating & Cooling Circuit

Mixing heating circuit



Mixing cooling circuit

Y21



Mixing cooling circuit with a heat pump

B21

K1/E11

B71

B83

B81E10P

E9P

Q8/E14

B91

Y21

Y21

Q2

B9

B1

Q9

RG1

Y1/Y

2



Separate circuit for heating and cooling



Partial diagram in the zone controller

B1 T

Q2

Y1/Y2

Y21

Rh14 HC/CCT

B9

RG1B1 T

Q2

HC

Rh38 RG1 TB9

T CC

Y1/Y2

Q24

B16

Y23/Y24

Extension module



Constant controller

Heat pump

CHP

HC

Heat generation Distribution

RVS13.123RVS13.143RVS53.183

RVS63.243RVS63.283

RVS61.283RVS51.183

RVA10.121

Boiler

RVS46.530

RVS43.143 System compatible

RVS46.543

Zone

1 21 2 M

Bi- /Multi-valent

System compatible

System compatible

System compatibleSystem compatible

System compatible

Controller with cooling function



Boiler/Chiller with heat/cool circuit, 2 pipes

Y21 Y1/Y2

Q2

B9

B1

RG1K4

B2

Chiller

Dehumidifier

RVS43.143

AVS75.390

Example Italy



RESET

Operating units

Heating

Cooling buttonOn: cooling function is

activatedOff: cooling function is deactivated

Heating & Cooling



Automatic

Comfort

Reduced

Protection

HMI RU

The bar on the display indicates the active operating mode

Operating Mode Heating Circuit



Operating Mode Heating Circuit

Operating mode Heating level Functions

Automatic

Heating according to time program

ECO functions active

Holiday function active

Comfort

Heating mode with no time program

ECO functions inactive

Holiday function inactive

Reduced

Heating mode with no time program



Protection

Heating OFF (frost protection active)



AUTO



TRK Room temperature - Comfort setpoint TRR Room temperature - Reduced setpoint TRF Room temperature - frost protection

setpoint

0 2 4 6 8 10 12 14 16 18 20 22 24 26 °C

2358Z01

TRK

TRR

TRF

TRKmax

Room Temperature Setpoint Heating



Operating Mode Cooling Circuit

Cooling buttonOn: cooling function is activatedOff: cooling function is deactivated

Gerät löschen? Ja

0 4 8 12 16 20 24

AUTO

KühlbetriebAutomatik



Operating Mode Cooling Circuit

Operating mode Cooling level Functions

Comfort

Cooling mode with/ or without time program

ECO functions inactive

Holiday functions active

Protection

Heating & Cooling OFF

(frost protection active)


Holiday / RU functions inactive



TRK: Room temperature - Comfort setpoint TRF: Room temperature - frost protection setpoint

0 2 4 6 8 10 12 14 16 18 20 22 24 26 °C

2358Z01

TRK

TRF

Room Temperature Setpoint Cooling



Knob for comfort set point

HMI RU

Heating mode Set point for room temperature heating e.g. 21°C

Cooling mode Set point for room temperature cooling e.g. 24°C



Functionality

ON

24

TAgem

TAgem

OFFdays

20

28

32

60

12

16

8

coolingheating

lock timeend of heat demand

release after outsidetemperature

12 153 9 18

• Lock time after heating (Par. e.g. 48 hr)

and/ or

• Cooling limit at outside temperature Par. e.g. 26°C

The cooling function can be activated any time but it works only if there is no heating demand heating first



Time Switch Program Heating

The nominal phases depend on the settingsmade at the enduser level

0 2 4 6 8 10 12 14 16 18 20 22 24 h

Mo...Su

2284

Z08

Each time program can be reset separately



Release:-24h/day (manual operating)-Time program Heating circuit-Time program 3-Time program 4/ DHW

0 2 4 6 8 10 12 14 16 18 20 22 24

h

Nominalsetpoint

Off

Time Switch Program Cooling



Heating curve – slope

20 10 0 -10 -20 -30

90

80

70

60

50

40

30

°C

°C

4 3,5 3 2,75 2,5 2,25

2

1,75

1,5

1,25

1

0,75

0,5

0,25

100

200

0D02

Possibility for heating curve adaptation (optimisation function)

TVw

TAgem



- Flow temp set point at OT 25°C - Flow temp set point at OT 35°C

TAgemSet point25°C

0°C

TVKw

Set point35°C

Cooling curve



Flow Temperature Limitation Heating

0 10 20 30 40 50 60 70 80 90 100

TV

max

min

akt

°C

2373

Z15

TVw

TVmin

TVmax

TVw Current flow temperature setpointTVmin Minimum limitation of the flow temperature setpointTVmax Maximum limitation of the flow temperature setpoint



Flow temperature minimum limitation

-Flow temp set min OT at 25°C

-Flow temp set min OT at 35°C

TAgem

TVKw

TVK min

TVKw

Min. limitationSet point 25°C


Flow Temperature Limitation Cooling



Flow temperature minimum limitation

Default setting 18°C (condensing protection)

- Flow temp set min OT at 25°C = 18°C- Flow temp set min OT at 35°C = 18°C

TAgem

TVKw

TVK min

TVKw



18°C

Flow Temperature Limitation Cooling



Room Functions for Heating and Cooling

OFF

ONP

°C

TRxTRw+SDR

TRw

t

TRx Actual value of room temperatureTRw Room temperature setpointSDR Room temperature differentialP Pump

Room temperature limitation Room influence must be active (1-100)



Room Functions only Heating

Room model

If there is no room sensor connected or room influence is deactivated, the control calculates a virtual room temperature which is used for the following functions:

- Boost heating- Quick setback- Optimum start control- Optimum stop control




Room modelCalculation depends on: Sth -> gradient room model

Tn -> time constant building

Comf

Red

Frost

TAgem

Comf

Red

Frost

TAgem Tn

Tn

Tn

TRw

Sth

Sth




Optimum start control

The heating‘s switch-on time (change to Comfort temperature) will be selected such that the room temperature will have reached the setpoint minus 0.25 °C by the time occupancy starts.

0 24

235

8Z02

Xein Xaus

TRx

TRw

ZSP

1/4 °C




Optimum stop control

The heating’s switch-off time (change to Reduced temperature) will be selected such that at the time occupancy ends, the room temperature will lie 0.25 °C below the nominal setpoint (early shutdown).

0 24

235

8Z02

Xein Xaus

TRx

TRw

ZSP

1/4 °C



ECO Functions only heating

Temp

TimeOffOn

Actual outside temp.

Composite outside temp.

24-hourheating limit

1°K

Diff.

Room setpoint

24-hour heating limit (Tagesheizgrenze)

The heating circuit is switched off depending on the actual and the composite outside temperature.



Control humidity in the room for Cooling

1. stage

With minimal flow temp set point Set to 18°C B1 sensor required in the flow

TVKw

TVK min

TVKw



18°C




2.stage

With hygrostat in DI H1 (para 5950) Increasing flow temp set point (para 947)

TVKw

TVK min



18°COffset (Par)

24

27

1

2 3

1518

G01




2.stage

or with dew point monitor Switched off the cooling function for a set time (para 946)

3.stage 3 (Step 2) With a humidity sensor Calculating the dew point according the room temperature

and the humidity measuring

1

2 3

1518

G01

stop




3.stage 3 (Step 2) With a humidity sensor Calculating the dew point according the room temperature

and the humidity measuring

Heating & Cooling Circuit

Documents

Transcript of Heating & Cooling Circuit