Installation and operating instruction
Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact
5 Installation
83309302 1/2018-05 La
38-196
5.2 Hydraulic connection
Safety valve
A safety valve must be installed in the fresh water inlet.
The safety valve:
must not be shut off from fresh water storage tank,
must respond at the latest when the maximum permitted operating pressure of
the fresh water storage tank has been reached.
Weishaupt recommend the connection group WHI con-heat/aqua (accessory).
This contains:
safety valve,
drainage hose,
shut off valve,
non return cap,
and possibly a fresh water expansion vessel (optional).
Connect domestic installation
Connect central heating water pipework
If necessary fit sludge separator in the return line.
Fit safety valve to fresh water connection.
Connect fresh water pipes, observe local regulations (e. g. DIN 1988, EN 806).
If necessary, connect circulation group WHI circu with circulation lance (access-
ory) to the DHW connection
1
– or – connect circulation group (on site) to
fresh water connection
2
.
3
2
1
4
1
DHW G¾
2
Fresh water G¾
3
Heating circuit return G¾
4
Heating circuit flow G¾
Fill fresh water storage tank
Open fresh water inlet.
Open hot water tap in the house.
Fresh water storage tank is being filled.
Close hot water tap.