Nibe S735 - Dimensions and Pipe Connections

SYSTEM DIAGRAM
S735 consists of a heat pump, water heater, immersion
heater, fan, circulation pump and control system.S735 is
connected to the ventilation system and heating medium
circuits.
When the room temperature exhaust air, and in certain cases
outdoor air, passes through the evaporator, the refrigerant
evaporates because of its low boiling point. In this way the
energy in the room air is transferred to the refrigerant.
The refrigerant is then compressed in a compressor, causing
the temperature to rise considerably.
The warm refrigerant is led to the condenser. Here the refri-
gerant gives off its energy to the heating system water,
whereupon the refrigerant changes state from gas to liquid.
The refrigerant then goes via filters to the expansion valve,
where the pressure and temperature are reduced.
The refrigerant has now completed its circulation and re-
turns to the evaporator.
4
3
1
XL 2
Connection, heating medium flowXL1
Connection, heating medium returnXL2
Cold water connectionXL3
Hot water connectionXL4
Caution
This is a principle of operation. For more detailed
information about S735, see section "The heat
pump design".
Dimensions and pipe
connections
XL2 XL4 XL3 XL1 WM1
The overflow cup (WM1) can be turned, allowing the pipe to
be pointed forwards or backwards to simplify connection to
the drain.
SETTING OUT DIMENSIONS
440
A
B
C
440
A
B
C
CBAConnection
105280115(mm)XL1 Heating medium supply
370275180(mm)XL2 Heating medium return
195445190(mm)XL3 Cold water
250400255(mm)XL4 Hot water
6003402005(mm)XL29 T&P connection
50275185(mm)WM1 Overflow cup
PIPE DIMENSIONS
Connection
22(mm)XL1-XL2 Heating medium ext Ø
22(mm)XL3 Cold water ext Ø
22(mm)XL4 Hot water ext Ø
15(mm)XL29 Connection, T&P valve
32(mm)WM2 Overflow water discharge
NIBE S735Chapter 4 | Pipe and ventilation connections16