Installation manual
16
EKHBH/X008BA
Indoor unit for air to water heat pump system
4PW54185-1B
Charging water
1
Connect the water supply to a drain and fill valve (see
2
Make sure the automatic air purge valve is open (at least 2
turns).
3
Fill with water until the manometer indicates a pressure of
approximately 2.0 bar. Remove air in the circuit as much as
possible using the air purge valves. Air present in the water
circuit might cause malfunctioning of the backup heater.
4
Check that the backup heater vessel is filled with water by
opening the pressure relief valve. Water must flow out of the
valve.
Piping insulation
The complete water circuit, inclusive all piping, must be insulated to
prevent condensation during cooling operation and reduction of the
heating and cooling capacity.
If the temperature is higher than 30°C and the humidity is higher than
RH 80%, then the thickness of the sealing materials should be at
least 20 mm in order to avoid condensation on the surface of the
sealing.
Field wiring
Overview
The illustration below gives an overview of the required field wiring
between several parts of the installation. Refer also to
application examples" on page 4
NOTE
■
During filling, it might not be possible to remove all
air in the system. Remaining air will be removed
through the automatic air purge valves during first
operating hours of the system. Additional filling
with water afterwards might be required.
■
The water pressure indicated on the manometer
will vary depending on the water temperature
(higher pressure at higher water temperature).
However, at all times water pressure should
remain above 0.3 bar to avoid air entering the
circuit.
■
The unit might dispose some excessive water
through the pressure relief valve.
■
Water quality must be according to EU directive
98/83 EC.
WARNING
■
A main switch or other means for disconnection,
having a contact separation in all poles, must be
incorporated in the fixed wiring in accordance with
relevant local and national legislation.
■
Switch off the power supply before making any
connections.
■
Use only copper wires.
■
Never squeeze bundled cables and make sure that it
does not come in contact with the piping and sharp
edges.
Make sure no external pressure is applied to the
terminal connections.
■
All field wiring and components must be installed by a
licensed electrician and must comply with relevant
European and national regulations.
■
The field wiring must be carried out in accordance
with the wiring diagram supplied with the unit and the
instructions given below.
■
Be sure to use a dedicated power supply. Never use a
power supply shared by another appliance.
■
Be sure to establish an earth. Do not earth the unit to
a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
■
Be sure to install an earth leakage circuit breaker in
accordance with relevant local and national
regulations. Failure to do so may cause electrical
shock or fire.
■
Be sure to install the required fuses.
A
Single power supply for
outdoor unit, backup
heater and booster
heater
G
3-way valve for domestic
hot water tank (optional)
H
2-way valve for cooling
mode (field supply)
B
Outdoor unit
C
Bottom plate heater
EKBPHT
(a)
(a) Bottom plate heater is only applicable in combination with ERLQ or in case of
optional EKBPHT kit.
I
Domestic hot water tank
(optional)
D
Backup heater
J
Booster heater
(optional)
E
Indoor unit
F
Room thermostat
(optional)
K
User interface (digital
controller)
T
I
M
M
2
B
1
4
5
D
6
7
8
9
3
E
A
10
11
F
K
I
C
J
H
G
