E(D/B)(H/L)Q011~016BB
Unit for air to water heat pump system
4PW67904-1 – 01.2011
Installation manual
24
9.4.
Field wiring guidelines
■
Most field wiring on the unit is to be made on the terminal block
inside the switch box. To gain access to the terminal block,
remove the switch box service panel (door 2).
■
Cable tie mountings are provided at the bottom of the switch
box. Fix all cables using cable ties (field supply).
■
A dedicated power circuit is required for the backup heater.
■
Installations equipped with a domestic hot water tank (optional),
require a dedicated power circuit for the booster heater
(1)
.
Please refer to the domestic hot water tank installation manual.
■
Lay the electrical wiring so that the front cover does not rise up
when doing wiring work and attach the front cover securely (see
figure 2
).
■
Follow the electric wiring diagram for electrical wiring works (the
electric wiring diagrams are located on the rear side of doors 1
and 2).
9.5.
Precautions on wiring of power supply
■
Use a round crimp-style terminal for connection to the power
supply terminal board. In case it cannot be used due to
unavoidable reasons, be sure to observe the following
instruction.
-
Do not connect wires of different gauge to the same power
supply terminal. (Looseness in the connection may cause
overheating.)
-
When connecting wires of the same gauge, connect them
according to the below figure.
■
Use the correct screwdriver to tighten the terminal screws.
Small screwdrivers can damage the screw head and prevent
appropriate tightening.
■
Over-tightening the terminal screws can damage the screws.
■
See the table below for tightening torques for the terminal
screws.
■
Attach an earth leakage circuit breaker and fuse to the power
supply line (see
"Specifications of standard wiring components"
on page 24
.
■
In wiring, make certain that prescribed wires are used, carry out
complete connections, and fix the wires so that outside forces
are not applied to the terminals.
Specifications of standard wiring components
Door 1: compressor compartment and electrical parts: X1M
1 Earth leakage circuit breaker
2 Fuse
Procedure
1
Using the appropriate cable, connect the power circuit to the
main circuit breaker as shown on the wiring diagrams (inside of
door 1) and in
figure 2
.
2
Fix the cable with cable ties to the cable tie mountings to ensure
strain relief. (Positions are marked with
in
figure 2
).
Connection of the backup heater power supply
Power circuit and cable requirements
This power circuit must be protected with the required safety devices
according to the applicable legislation.
Select the power cable in accordance with the applicable legislation.
For the maximum running current of the backup heater, refer to the
table below.
WARNING
Switch off all power supply – i.e. unit power supply
and backup heater and domestic hot water tank
power supply (if applicable) – before removing the
switch box service panel.
(1) Only applicable for tank with built-in electrical booster heater (EKHW*).
Tightening torque
(N•m)
M4 (X1M)
1.2~1.8
M5 (X1M)
2.0~3.0
M5 (EARTH)
3.0~4.0
1
2 3
1 Round pressure terminal
2 Cut out section
3 Cup washer
V3
W1
Minimum circuit amps (MCA)
(a)
(a) Stated values are maximum values.
26.5
14
Recommended field fuse
32 A
20 A
Wire type
(b)
(b) Only in protected pipes, use H07RN-F when protected pipes are not used.
H05VV-U3G
H05VV-U5G
Size
Wiring size must comply with the
applicable local and national code
Wire type of wiring between the units
H05VV-U4G2.5
NOTICE
The earth leakage circuit breaker must be a high-speed
type breaker of 30 mA (<0.1 s).
CAUTION
■
Be sure to use a dedicated power circuit for the
backup heater. Never use a power circuit shared by
another appliance.
■
Use one and same dedicated power supply for the
unit, backup heater and booster heater
(a)
(domestic
hot water tank).
(a) Only applicable for tank with built-in electrical booster heater (EKHW*).
V3
1N~ 50 Hz
230 V
W1
3N~ 50 Hz
400 V
L1
L3
L2
L1
L3
L2
1
2
X1M
X1M
