Vaillant geoTHERM SERIES, Руководство по установке, Страница: 62 / 132

Electrical installation
62
Installation instructions geoTHERM 0020051574_04
7
7.8.2 Connecting an external boiler without eBUS
interface
b
Caution!
Risk of damage due to freezing.
If the value “DHW+CH”, “Hot water” or
“CH” is set in menu A3
(
¬
Tab. 9.9 )
“hydraulic
integration of the auxiliary heater” for the
auxiliary heater, in accordance with the
hydraulic scheme, emergency frost protection
is only available for the set component(s) and
not for the heat pump and a DHW tank.
>
If there is a risk of frost in the heat
pump’s installation space when it is
switched off for a prolonged period due
to a fault, you must ensure that it is pro-
tected against frost.
1
7.24 Connecting a boiler without eBUS interface
>
Install a cut-off relay ( 1 ) (accessory) for the boiler.
>
Remove the connection cable from terminal ZH on the
controller PCB (
1 ) (
¬
Fig. 7.18 ).
>
Connect the cable from the cut-off relay to this terminal.
>
After starting up the unit, set the hydraulic integration of
the external boiler as an auxiliary heater (
menu A3 )
(
¬
Tab. 9.9 ).
The heat pump switches in the external boiler, depending
on the heat requirement and controller setting.
7.9 Fitting the cladding and the operating panel
1
2
7.25 Fitting the side cladding
>
Place the lower end of both side cladding parts into the
guide slots on the heat pump and then slide the cladding
backwards.
>
Use two flat-head screws to secure each of the cladding
parts.
3.
3.
2.
1.
1
7.26 Fitting the upper part of the front cladding
>
Guide the eBUS line for the operating panel and, if you
are using the vrnetDIALOG accessory, the 230 V voltage