Nibe S1255 - Page 17

VENTILATION RECOVERY
The installation can be supplemented with the exhaust air
module NIBE FLM S45 to provide ventilation recovery.
• Pipes and other cold surfaces must be insulated with dif-
fusion-proof material to prevent condensation.
• The brine system must be supplied with a pressure expan-
sion vessel. If there is a level vessel this should be re-
placed.
P
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 dif-
fusion-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 expan-
sion vessel. If there is a level vessel this should be re-
placed.
-EP25-AA25
-EP25-QN18-EP25-BT64
-EP25-GP13
-EP25-BT65
-EP25-RM1
-EP25
EXTRA CLIMATE SYSTEM
In buildings with several climate systems that require differ-
ent supply temperatures, the accessory ECS 40/ECS 41 can
be connected.
A shunt valve then lowers the temperature to the underfloor
heating system, for example.
-EP21-GP10-EP21-BT2
-EP21-AA25
-EP21-BT3
-EP21-QN25
-EP21
POOL
With the POOL 40 accessory, you can heat the pool with
your system.
During pool heating, the heating medium circulates between
the S1255 and the pool exchanger using the heat pump’s
internal circulation pump.
-CL11-HQ4-CL11-BT51-CL11-GP9
-CL11-EP5
-CL11-AA25
-CL11
HOT WATER CIRCULATION
A circulation pump can be controlled by S1255 to circulate
the hot water. The circulating water must have a temperat-
ure that prevents bacterial growth and scalding, and national
standards must be satisfied.
The HWC return can be connected to XL5 or a freestanding
water heater. If an electric water heater is connected after
the heat pump, the HWC return must be connected to the
water heater.
The circulation pump is activated via the AUX output in menu
7.4 -"Selectable in/outputs".
-QZ1-FQ3
-QZ1-GP11
-QZ1-RM1
-QZ1-RN1
-QZ1
17Chapter 4 | Pipe connectionsNIBE S1255