Installing The Mounting Plate (Accessory); Hanging The Hiu; Electrical Connection - Worcester Greenstar HIU Installation And Maintenance Instructions Manual

Electrical connection

5.3

Installing the mounting plate (accessory)

The mounting plate makes it easier to connect the pipework to the HIU
and is a necessary accessory.
▶ Attach mounting plate securely.
▶ Connect pipework to mounting plate.
18
390
72 65 65
Ø22mm
1
78
33
83
40
Ø15mm
Fig. 18 Mounting plate, dimensions in mm
[1] Optional position for pressure gauge
▶ Mount connection elbow [1] on heating return connection.
Fig. 19 Mounting connection elbow
5.4

Hanging the HIU

▶ Insert the enclosed gaskets before hanging the HIU. The blue gaskets
[4] are for the potable water connections.
▶ Place the suspension point of the HIU [1] on the hook [3] of the wall
mounting bracket [2].
10
18
40
65 65 65
1
▶ Tighten the connections [5].
19
78
5
Fig. 20 Place the HIU on the wall mounting bracket
6 Electrical connection
WARNING
Danger to life from electric shock!
Touching live electrical parts can cause an electric shock.
▶ Before installing accessories: Disconnect the power supply to the
heat generator, building management system and any other BUS
systems (all poles) and secure against unintentional reconnection.
You can also find information on safe electrical isolation in the Health and
Safety Executive guidance HSG85 and in the GS38.
NOTICE
Overload damage
Never exceed the specified maximum power input ( specifications).
▶ Install a standard all-pole isolator (to EN60335-1) to disconnect the
mains voltage.
Electrical work may only be performed by electricians.
▶ Only connect to a single phase and earth system.
▶ Any system/appliances connected to the HIU must not have a
separate power supply.
▶ Use a Type A residual current device if additional protection is
required.
The module is prewired. All you need to do is connect the accessories (if
applicable) and connect to the mains power supply.
1
2
3
4
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Greenstar – 6721852556 (2022/11)