Installation manual
14
RKHBH/X008AA
Indoor unit for air to water heat pump system
4PW50203-1A
Connection of the valve control cables
Valve requirements
■
Power supply: 230 V AC
■
Maximum running current: 100 mA
Wiring the 2-way valve
1
Using the appropriate cable, connect the valve control cable to
the X2M terminal as shown on the wiring diagram.
2
Fix the cable(s) with cable ties to the cable tie mountings to
ensure strain relief.
Wiring the 3-way valve
1
Using the appropriate cable, connect the valve control cable to
the appropriate terminals as shown on the wiring diagram.
2
Fix the cable(s) with cable ties to the cable tie mountings to
ensure strain relief.
Connection to a benefit kWh rate power supply
Electricity companies throughout the world work hard to provide
reliable electric service at competitive prices and are often authorized
to bill clients at benefit rates. E.g. time-of-use rates, seasonal rates,
Wärmepumpentarif in Germany and Austria, ...
This equipment allows for connection to such benefit rate power
supply delivery systems.
Consult with the electricity company acting as provider at the site
where this equipment is to be installed to know whether it is
appropriate to connect the equipment in one of the benefit kWh rate
power supply delivery systems available, if any.
When the equipment is connected to such benefit kWh rate power
supply, the electricity company is allowed to:
■
interrupt power supply to the equipment for certain periods of
time;
■
demand that the equipment only consumes a limited amount of
electricity during certain periods of time.
The indoor unit is designed to receive an input signal by which the
unit switches into forced off mode. At that moment, the outdoor unit
compressor will not operate.
NOTE
Wiring is different for a NC (normal closed) valve
and a NO (normal open) valve. Make sure to
connect to the correct terminal numbers as
detailed on the wiring diagram and illustrations
below.
Normal closed (NC)
2-way valve
Normal open (NO) 2-way valve
Two types of 3-way valves can be connected. Wiring
is different for each type:
■
"Spring return 2-wire" type 3-way valve
The 3-way valve should be fitted as such that
when the 3-way valve is idle (not activated), the
space heating circuit is selected.
■
"SPST 3-wire" type 3-way valve
The 3-way valve should be fitted as such that
when terminal ports 9 and 10 are electrified, the
domestic hot water circuit is selected.
"Spring return 2-wire" valve
"SPST 3-wire" valve
NC
5
X2M
6
7
M
NO
5
6
X2M
7
M
9
X2M
8
10
M
9
X2M 8
10
M
WARNING
For a benefit kWh rate power supply like illustrated
below as type 1
■
If the benefit kWh rate power supply is of the type that
power supply is not interrupted, then control of the
heaters is still possible.
For the different possibilities of controlling heaters at
moments that benefit kWh rate is active, refer to
"[D] Benefit kWh rate power supply" on page 22.
If heaters must be controlled at moments that the
benefit kWh rate power supply is off, then these
heaters shall be connected to a separate power
supply.
■
During the period that the benefit kWh rate is active
and power supply is continuous, then stand-by power
consumption is possible (PCB, controller, pump, ...).
For a benefit kWh rate power supply like illustrated
below as types 2 or 3
If during benefit kWh rate power supply the power supply is
shut, then heaters can not be controlled.
■
This power supply interruption should not be longer
than 2 hours, otherwise the real time clock of the
controller will be reset.
■
During power supply interruption, the controller
display will be blank.
1D_IM_4PW50203-1A.book Page 14 Thursday, January 29, 2009 10:51 AM
