Installation manual
8
E080B3VJU
Domestic hot water tank for air to water heat pump system
4PW56114-1
Note: only relevant field wiring and not all implemented parts are
shown.
■
For EXHBH/X units only
■
For EDH, EBH, EDL, EBL units only
M
AINTENANCE
In order to ensure optimal availability of the unit, a number of checks
and inspections on the unit and the field wiring have to be carried out
at regular intervals.
The described checks must be executed at least once a year.
1
Domestic hot water tank pressure relief valve (field supply)
and/or temperature and pressure relief valve (field supply)
Check for correct operation of the pressure relief valve and/or
temperature and pressure relief valve on the domestic hot water
tank.
2
Domestic hot water tank booster heater
It is advisable to remove lime buildup on the booster heater to
extend its life span, especially in regions with hard water. To do
so, drain the domestic hot water tank, remove the booster heater
from the domestic hot water tank and immerse in a bucket (or
similar) with lime-removing product for 24 hours.
TR1
TR2
X8M
K1M
K2M
K5M
K3M
K6M
F2B
F3B
F1B
X1M
X3M
X3M
X2M
X4M
A1P
X13A
X9A
A4P
208/230 V AC
3 kW
L1 L2
VJU
>2 inch
(>50 mm)
2
X4M
2
X6M
3
4
Q3L
X2M
L
BRN
BLU
BLK
N Y
M3S
L N Y
10
9
8
X2M
The power supply cable towards the booster heater
X4M
→
X6M and the cable towards the thermal protector
X2M (13-14)
→
Q3L (4-3) are separated. However, if
allowed according to local laws and regulations, these 2
cables can be combined in 1 cable (5 wires).
CAUTION
■
Before carrying out any maintenance or repair activity,
always switch off the circuit breaker on the supply
panel, remove the fuses or open the circuit breaker,
protection devices of the unit.
■
Make sure that before starting any maintenance or
repair activity, also the power supply to the outdoor
unit is switched off.
A11P
A11P
K3M
K3M
F2B
F2B
X13A
X2M
X2M
X9A
X9A
X3M
X3M
X4M
X4M
2
X4M
2
X6M
208/230 V AC
3 kW
L1 L2
VJU
K3M
F2B
X2M
X9A
X3M
X4M
A11P
>2 inch
(>50 mm)
L
BRN
BLU
BLK
N Y
M3S
L N Y
10
9
8
X2M
4 3
Q3L
X2M
1D_IM_4PW56114-1.book Page 8 Friday, September 18, 2009 1:50 PM
