RKHBH/X008AA
Indoor unit for air to water heat pump system
4PW50203-1A
Installation manual
17
Pre-operation checks
Checks before initial start-up
After the installation of the unit, check the following before switching
on the circuit breaker:
1
Field wiring
Make sure that the field wiring between local supply panel and
indoor unit, outdoor unit and indoor unit, indoor unit and valves
(when applicable), indoor unit and room thermostat (when
applicable), and indoor unit and domestic hot water tank has
been carried out according to the instructions described in the
chapter "Field wiring" on page 11, according to the wiring
diagrams and according to European and national regulations.
2
Fuses or protection devices
Check that the fuses or the locally installed protection devices
are of the size and type specified in the chapter "Technical
specifications" on page 29. Make sure that neither a fuse nor a
protection device has been bypassed.
3
Booster heater circuit breaker F2B
Do not forget to turn on the booster heater circuit breaker F2B in
the switch box (applies only to units with optional domestic hot
water tank installed).
4
Earth wiring
Make sure that the earth wires have been connected properly
and that the earth terminals are tightened.
5
Internal wiring
Visually check the switch box on loose connections or damaged
electrical components.
6
Fixation
Check that the unit is properly fixed, to avoid abnormal noises
and vibrations when starting up the unit.
7
Damaged equipment
Check the inside of the unit on damaged components or
squeezed pipes.
8
Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there is a
refrigerant leak, call your local dealer.
9
Power supply voltage
Check the power supply voltage on the local supply panel. The
voltage must correspond to the voltage on the identification label
of the unit.
10
Air purge valve
Make sure the air purge valve is open (at least 2 turns).
11
Pressure relief valve
Check if the backup heater vessel is completely filled with water
by operating the pressure relief valve. It should purge water
instead of air.
12
Shut-off valves
Make sure that the shut-off valves are correctly installed and
fully open.
Powering up the indoor unit
When power supply to the indoor unit is turned on, "
88
" is displayed
on the user interface during its initialisation, which might take up to
30 seconds. During this process the user interface cannot be
operated.
Setting the pump speed
The pump speed can be selected on the pump (see "Main
components" on page 6).
The default setting is high speed (III). If the water flow in the system
is too high (e.g., noise of running water in the installation) the speed
can be lowered (I or II).
The available external static pressure (ESP, expressed in mH
2
O) in
function of the water flow (l/min) is shown in the graph below.
Field settings
The indoor unit should be configured by the installer to match the
installation environment (outdoor climate, installed options, etc.) and
user demand. Thereto, a number of so called field settings are
available. These field settings are accessible and programmable
through the user interface on the indoor unit.
Each field setting is assigned a 3-digit number or code, for example
[5-03], which is indicated on the user interface display. The first digit
[5] indicates the 'first code' or field setting group. The second and
third digit [03] together indicate the 'second code'.
A list of all field settings and default values is given under "Field
settings table" on page 23. In this same list, we provided for 2
columns to register the date and value of altered field settings at
variance with the default value.
A detailed description of each field setting is given under "Detailed
description" on page 18.
Switch off the power supply before making any
connections.
Operating the system with the backup heater vessel not
completely filled with water will damage the backup heater!
Operating the system with closed valves will damage the
pump!
0
1
2
3
4
5
6
7
I
III
II
12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42
ESP
[mH
2
O
]
[l/min]
1D_IM_4PW50203-1A.book Page 17 Thursday, January 29, 2009 10:51 AM
