Installation manual
6
EKHWS150~3 E300B3Z2
Domestic hot water tank for air to water heat pump system
4PW54951-1
Note: only relevant field wiring is shown.
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.
T
ROUBLESHOOTING
This section provides useful information for diagnosing and
correcting certain troubles which may occur in the unit.
General guidelines
Before starting the troubleshooting procedure, carry out a thorough
visual inspection of the unit and look for obvious defects such as
loose connections or defective wiring.
Before contacting your local dealer, read this chapter carefully, it will
save you time and money.
When a safety device was activated, stop the unit and find out why
the safety device was activated before resetting it. Under no
circumstances safety devices may be bridged or changed to a value
other than the factory setting. If the cause of the problem cannot be
found, call your local dealer
A4P
K6M
F2B
K3M
K7M
2
1
X4M
4a
OPTIONAL
X2M
21
20
Q2L
3-way valve
2-way valve
12
11
4
thermostat
2
1
3
5
6
7
8
9
10
13
19
thermal
fuse
14
15
16
17
18
SOLAR PUMP
N
L
L2
L1
X3M (230V)
F1B
TR1
TR1
A1P
A1P
X2M
X1M
K5M
K2M
K1M
K1M
K2M
K5M
K4M
1
2
3
L1
L2
L3
N
15a
K3M
X9A
X13A
1 2
4
2
3
X4M
X2M
>50 mm
X4M
X3M
230 V AC
3 kW
L N
400 V AC
3 kW
L1 L2
V3
Z2
3 way
valve
L
BRN
BLU
BLK
N Y
■
Before carrying out any maintenance or repair activity,
always switch off the circuit breaker on the supply
panel, remove the fuses or open the 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.
■
Domestic hot water tank pressure relief valve (field
supply)
■
A check for correct operation of the pressure relief
valve installed on your domestic hot water tank,
has to be carried out at least every 6 months: it is
important that the lever on the valve is actuated to
prevent accumulation of mineral deposits that may
impair valve operation and to confirm that the valve
and discharge pipe are not blocked. The lever
should be operated slowly and smoothly to avoid a
sudden rush of hot water from the discharge pipe.
Failure to operate the relief valve actuating lever
may result in the water heater exploding.
■
Continuous leakage of water from the discharge
pipe may indicate a problem with the water heater.
■
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.
When carrying out an inspection on the supply panel or on
the switch box of the unit, always make sure that the circuit
breaker of the unit is switched off.
Summary of Contents for Altherma EKHWS150B3V3
Page 10: ...4PW54951 1 Copyright Daikin ...
