© Central Heating New Zealand Ltd
3 of 10
July 2016
2.
System configuration
There are 2 common configurations, A or B for heating and either can also have DHW, C:
A)
Heat pump using own controller as room thermostat
B)
Heat pump using additional central heating controller as room thermostat
C)
Heating configuration A or B with DHW
Set the parameters according to the 3 tables below.
2.1.
System A: Heat Pumps controller used as room thermostat
Parameter Description
Value
Default
Set to
41 00
So that the controller turns the heat pump on and off according
to the room set point on the controller set to 0
0 = Room Set Point
1 = Water Set Point
1
0
21 01
Flow temperature set point for heating
35 to 45 underfloor (depending on floor covering)
60 – radiators
45
See
description
42 00
Internal circulating pump configuration
0=always on (even when no heat demand, not recommended)
1=on/off based on buffer tank temp
2=on/off based on sniffing cycles
0
2
42 01
Time pump on when sniffing
3
3
42 02
Time pump off between sniffs
5
5
43 01
Start temp of frost protection on Room air temperature
14
5
Heating system:
Radiators or
Underfloor
Heat pump
controller also
used as room
thermostat
