7
Insulate the DHW line in accordance with
local regulations.
Accurately maintain the order of fittings
on the cold water side (see Fig.1).
Flush the line prior to installation.
Install a drain valve at the lowest point
of the cold water supply inlet for future
maintenance of the tank.
Install a 700kPa pressure and tempera-
ture relief valve (PTRV) (Fig.1, pos.4).
Observe the requirements for expansion
control valve (ECV) (Fig.1, pos.7). In such
case, use a 550kPa valve.
A pressure reduction valve (PRV) must
be fitted (Fig.1, pos12) and adjusted to
a maximum of 500 kPa. If the ECV is re-
quired, set PRV to a maximum of 420kPa.
Please observe the following:
— Supply and drain pipe sizes should be
equal to safety valve sizes.
— Size the drain so that water can drain
off, even if the safety valve has been
fully opened.
— The drain outlet must not be able to
be closed and must always remain
open to atmosphere.
1 Capacitor
2 Electrical cable
3 Strain relief
4 Power terminals
5 Frost monitor
6 Heat pump control thermostat
7 Ventilator
8 Heat pump terminal
9 Control thermostat, electric booster heater, not shown,
points at place (only for the WWK 300 AH)
10 High limit safety cut-out Electric booster heater
(only for the WWK 300 AH)
11 Electric booster heater (only for the WWK 300 AH)
12 Protective anode (maintenance required)
13 Solenoid valve V1
14 Safety high pressure limit
15 Condensate pan drain (maintenance required)
16 Compressor
17 Motor circuit switch
18 Solenoid valve V2
26�03�01�1403
11
10
4
6
3
1
18
17
16
14
13
12
8
7
15
9
5
2
WWK 300 A/WWK 300 AH:
Fig. 3
Condensate drain
The device is designed so that, if it is in-
stalled externally, the condensate through
a suitable drain hose can freely drain
away. However, the condensate can also
(in case of internal installation or local
regulations) be routed away, to a garden
bed, a drain in the floor or a wall drain.
Note: Never kink the hose, to
ensure the condensate drains
perfectly.
If required install a condensate pump.
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