Connecting The Expansion Vessel (Accessory); Making The Electrical Connections To The Pump - Worcester GB162-50 Installation Instructions Manual

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Fig. 16 Condensate drain pipe
[1] Condensate drain pipe
5.8

Connecting the expansion vessel (accessory)

WARNING: Damage tot the unit due to faulty pressure
relief valve.
▶ The expansion vessel must be of sufficient capacity.
Connecting the expansion vessel in a multi-boiler configuration
(cascade configuration)
In cascade systems only one expansion vessel is required for the heating
system.
▶ Connect the expansion vessel to the secondary side of the header in
the return circuit, so that every boiler is connected to the expansion
vessel.
Refer to the cascade system installation instructions for the installation
details.
CHF CHR CHF
Gas Gas
Fig. 17 Connecting the expansion vessel in a multi-boiler configuration
(cascade configuration)
[1] Expansion vessel
[2] Low loss header
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7746800108-16.1TD
CHR
2
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5.9

Making the electrical connections to the pump

▶ Turn the vent key through a quarter rotation to undo the boiler door
lock [1].
▶ Push the fastener down [2] and open the boiler door [3].
▶ Remove the cover shield of the pump group [4].
3.
4.
Fig. 18 Opening the boiler door
▶ Undo 1 screw to release the cover over the electrical connections
and pull the cover up.
2.
Fig. 19 Pulling the cover over the electrical connections up
Installation
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2.
6 720 648 721-010.1TD
1.
7746800108-19.1TD
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