Fact sheet
S 22
District heating substation for small properties and apartment houses
Application
The S 22 is made in a compact design and is especiallysuitableforsupplyofheatinganddomestichot waterforsmallpropertiesandapartment houses. The S 22 is available with Danfoss ECL 310 for control of both heating and domestic hot water circuits. The substation is very suitable for oneand two pipe systems and is also applicable for systems with floor heating. The S 22 variants offer capacities ranging from 55to100kWheating(10to16kWfloorheating) and 40 to 110 kW domestic hot water. Please contact our sales department and together we shall find the optimum solution for your exact requirements.
Construction
The S22issuppliedwithabrazedplateheatexchangerfordomestichotwaterheating,electro- nicactuatorsandvalves,shut-offvalves,non-re- turn and safety valve, pump, circulation pump, thermometers, strainers, sensor pockets as well as differential pressure controller. Actuators and pumps are electrically wired from factory and supplied with CEE plug for connection to 220V. The electronic control is prepared for WebAccess, which enables remote control and remote monitoring via the internet/intranet. The substations aredelivered preassembled,electrically wired internally and the electronic control is tested for function and preset from factory.
The substation is supplied without fitting piece for heat meter. Fitting piece for heat meter is available as an option.
Design
The S 22 is designed for wall-mounting and during the construction much importance has been attached to a clear and user-friendly placement of all components. The S 22 can be supplied with a white-lacquered steel cover with door, which enables easy access for meter reading and service purposes.
Domestichotwaterrecirculation
AsstandardtheS22issuppliedwithalow-ener- gy pump for domestic hot water recirculation andcaneasilybeconnectedtoexistingsystems with DHW recirculation. On new constructions it is recommended to establish domestic hot water recirculation, which ensures that hot water is produced immediately, when tapping starts.This ensures maximum DHW comfort og eliminates water wastage.
HeatexchangerforDHWheating
The heat exchanger used in the S 22 is a brazed, highly efficient Danfoss plate heat exchanger, whichhasbeentestedandapprovedaccording to the PED-directive.
FEATURES AND BENEFITS
•Substation for apartment houses and small properties
•Indirect heating - one or two heating circuits
•Connections for DHW cylinder on the secondary side
•Electronic control of heating (HE) temperature
•Capacity: 39 - 95 kW HE / 35 kW FH / 75 kW cylinder or radiator
•Pipes connection in top or bottom of substation = Savings in installations costs
•Pipes and plate heat exchanger made of stainless steel
•Electrical wiring from factory - Plug & Play
Readingandsetting
All thermometers are placed so they are easy to read. Components, which can be adjusted, are easily accessible.
Maintenance
The substation is very service-friendly due to practical piping and assembly with nuts and gaskets. It is mounted on the wall and as all pipes are placed in pipe bracket distance, it is possible to establish a nice piping.
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CIRCUIT DIAGRAM - EXAMPLE
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2 |
Plate heat exchanger DHW |
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4 |
Diff. pressure controller |
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DHW |
5 |
Strainer |
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6 |
Non-return valve |
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7 |
Ball valve |
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8 |
Pump HE |
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DCW |
9 |
Circulation pump, DHW |
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10 |
Balancing valve, DHW |
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12 |
Safety valve DHW |
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Circ. |
13 |
Thermometer |
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DH |
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Supply |
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DH |
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Return |
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14 Manometer w/shut-off valve
17 Air valve
23Sensor pocket for heat meter (optional)
24Fitting piece for heat meter, (optional)
25Controller Danfoss ECL310/A266
26Outdoor sensor
27Sensor forward/return
28Sensor, DHW
29Actuator 2
30Valve 2
31Actuator 1
32Valve 1
P, M and S refer to the Danfoss ECLinstruction manual
HE
Supply
HE
Return
Design specifications:
Nominal pressure (prim/sec): Max. supply temperature.: Min. ΔP:
Weight:
Colour (cover):
Electrical supply:
Dimensions (mm):
Without cover:
With cover:
PN 10 / PN 10
120 °C |
Cover |
Cover |
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0,75 bar incl. differential |
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pressure controller |
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(alternatively 0,5 bar) |
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Max. 65 kg
<![if ! IE]><![endif]>Cover
White RAL 9010
220V AC
H 1037 xW 545 x D 370 |
H 1037 xW 600 x D 400 |
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Wall |
Top view |
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Connections: |
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1. DH supply |
5. DHW |
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2. DH return |
6. |
HE return |
3. DCW |
7. |
HE supply |
4. Circulation |
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Connections sizes:
DH, HE, DCW, DHW: |
G 1“ (int. thread) |
Circulation: |
G 1“ or ¾“ (int. thread) |
DHW: Capacity examples |
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HE: Capacity examples |
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Total (winter) |
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Plate heat |
Capacity |
Primary |
Secondary |
Tap load |
Pressure |
Flow |
Capacity |
Primary |
Secondary |
Pressure loss |
Flow |
Pres. loss |
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Flow |
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supply/return |
return/supply |
loss prim. |
Primary |
supply/return |
return/supply |
Primary |
Primary |
Prim. |
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Primary |
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exchanger |
kW |
°C |
°C |
l/min. |
1)bar |
l/h |
kW |
°C |
°C |
1)bar |
l/h |
total2) bar |
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total2) l/h |
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XB37M-1 20 |
40 |
60/18.5 |
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10/45 |
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16.33 |
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0.25 |
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830 |
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55 |
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70/30 |
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30/60 |
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0.27 |
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1183 |
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0.49 |
1500 |
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XB37M-1 30 |
65 |
60/18.5 |
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10/45 |
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26.66 |
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0.33 |
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1350 |
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100 |
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70/30 |
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30/60 |
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0.44 |
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2150 |
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0.86 |
2590 |
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XB37M-1 40 |
90 |
60/18.5 |
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10/45 |
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36.83 |
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0.57 |
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1870 |
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80 |
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70/30 |
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30/60 |
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0.28 |
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1720 |
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0.74 |
2710 |
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XB37M-1 30 |
70 |
65/20.0 |
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10/50 |
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25.16 |
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0.56 |
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1340 |
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65 |
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90/40 |
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40/74 |
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0.24 |
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1118 |
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0.51 |
1640 |
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XB37M-1 40 |
95 |
65/20.0 |
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10/50 |
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34.00 |
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0.54 |
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1810 |
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90 |
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90/40 |
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40/74 |
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0.23 |
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1548 |
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0.54 |
2250 |
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DHW: Capacity examples |
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HE: Capacity examples |
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Total (winter) |
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XB37M-1 30 |
70 |
65/20.0 |
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10/50 |
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25.16 |
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0.56 |
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1340 |
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10 |
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70/30 |
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30/35 |
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0.05 |
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215 |
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0.67 |
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1350 |
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XB37M-1 30 |
70 |
65/20.0 |
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10/50 |
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25.16 |
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0.56 |
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1340 |
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16 |
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70/30 |
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30/35 |
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0.13 |
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344 |
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0.53 |
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1750 |
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Danfoss Redan A/S · District Heating · Omega 7, Søften · DK-8382 Hinnerup · Denmark
Tel.: +45 87 43 89 43 · Fax: +45 87 43 89 44 · redan@danfoss.com · www.redan.danfoss.dk
© Danfoss | DHS-SRMT/ PL | 2017 . 12 |
VL.HE.J2.02 |