E(D/B)(H/L)Q011~016BB
Unit for air to water heat pump system
4PW67904-1 – 01.2011
Installation manual
26
Connection of the valve control cables
Valve requirements
■
Power supply: 230 V AC
■
Maximum running current: 100 mA
Procedure for 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 (inside of
door 2).
2
Fix the cable(s) with cable ties to the cable tie mountings to
ensure strain relief.
Procedure for 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
(inside of door 2).
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 unit is designed to receive an input signal by which the unit
switches into forced off mode. At that moment, the compressor will
not operate.
NOTICE
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
NOTICE
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
CAUTION
For a benefit kWh rate power supply like illustrated
below as type 1 (allowed for all models)
■
If the benefit kWh rate power supply is of the type that
power supply is not interrupted, then control of the
unit is still possible. The controller, the expansion
vessel heater, plate heat exchanger heater and switch
box heater have power supply and the freeze
protection function can operate when required.
■
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, ...).
■
If the benefit kWh rate is active for more than 2 hours,
backup heater operation can be required (part of the
freeze protection function, see
"Protecting the water
circuit against freezing" on page 19
). For this reason,
the backup heater shall be connected to a normal
kWh rate power supply and the correct setting [d-00]
must be selected. See
"[d] Benefit kWh rate power
supply/Local shift value weather dependent" on
page 42
.
For a benefit kWh rate power supply like illustrated
below as types 2 or 3
If during benefit kWh rate power supply, the main power
supply is shut off, and the normal kWh rate power supply is
not connected to 1-2, X11M (only allowed for EDL and EBL
models) then:
1.
the expansion vessel heater, plate heat exchanger
heater and switch box heater can not be controlled,
2.
the controller display will be blank + after 2 hours, the
real time clock of the controller will be reset,
3.
the freeze protection function (refer to
"Freeze
protection function" on page 35
) can not operate.
To overcome 1, 2 and 3 the unit should be connected to a
normal kWh rate power supply via 1-2 X11M to allow
continuous control and operation (e.g., pump, expansion
vessel heater, plate heat exchanger heater, switch box
heater, and freeze protection function).
The power supply (compressor compartment, X1M: L1, L2,
L3, N) interruption may not be longer than 2 hours to
guarantee to optimized startup condition for compressor.
