Nibe S1155 - Page 18

VENTILATION RECOVERY
The installation can be supplemented with the exhaust
air module NIBE FLM S45 to provide ventilation recov-
ery.
• Pipes and other cold surfaces must be insulated with
diffusion-proof material to prevent condensation.
• The brine system must be supplied with a pressure
expansion vessel. If there is a level vessel this should
be replaced.
P
FREE COOLING
The accessory PCS 44 allows the connection of passive
cooling, for example with fan coils. The cooling system
is connected to the heat pump brine circuit, whereby
cooling is supplied from the collector via a circulation
pump and shunt valve.
• Pipes and other cold surfaces must be insulated with
diffusion-proof material to prevent condensation.
• Where the cooling demand is high, fan convectors
with drip trays and drain connection are needed.
• The brine system must be supplied with a pressure
expansion vessel. If there is a level vessel this should
be replaced.
-EP25-AA25
-EP25-QN18-EP25-BT64
-EP25-GP13
-EP25-BT65
-EP25-RM1
-EP25
TWO OR MORE CLIMATE SYSTEMS
In buildings with several climate systems that require
different supply temperatures, the accessory
ECS 40/ECS 41 can be connected. A shunt valve then
lowers the temperature to the underfloor heating sys-
tem, for example.
-EP21-RM1
-EP21-GP10-EP21-BT2
-EP21-AA25
-EP21-BT3
-EP21-QN25
-EP21
POOL
With the POOL 40 accessory, you can heat the pool
with your heat pump.
During pool heating, the heating medium circulates
between the S1155 and the pool exchanger using the
heat pump’s internal circulation pump.
-CL11-HQ4-CL11-BT51-CL11-GP9
-CL11-EP5-CL11-QN19
-CL11-AA25
-CL11
CONNECTING HOT WATER CIRCULATION
Hot water circulation
A circulation pump can be controlled by S1155 to circu-
late the hot water. The circulating water must have a
temperature that prevents bacterial growth and scalding,
and national standards must be satisfied.
-QZ1-FQ3
-QZ1-GP11-QZ1-RM1-QZ1-RN1
-QZ1
NIBE S1155Chapter 4 | Pipe connections18