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Facia Panel
DHW Relay
PCB Cover
DHW Control
Input Cable
N
DHW Relay PCB
Fig. 29
8.0 Installation
8.10
Domestic Hot Water Wiring
The boiler can be wired to operate when there is
a demand for replenishment of an indirect
domestic hot water storage cylinder.
1. If not already done, slacken the facia securing
screws sufficiently to release the outercase panel
securing tabs. Lift and remove the panel.
2. Remove the screws securing the facia panel
and hinge it down.
3. Slacken the cable clamp on the R.H. side of
the boiler chassis. Insert the cable from the
cylinder thermostat through the cable clamp.
4. Undo the screws securing the DHW relay PCB
cover. Remove the cover. Slacken the screws in
the terminal block on the PCB and connect the
switched live and neutral (Fig. 29).
5. Lay the input cable in the cut out in the relay
PCB housing and refit the cover and screws.
6. Ensure that the input cable has sufficient slack
to allow the control box to drop down. Tighten the
cable clamp on the boiler chassis.
8.11
Preliminary Electrical Checks
L
1. Prior to commissioning the boiler preliminary
electrical system checks should be carried out.
2. These should be performed using a suitable
meter, and include checks for Ground Continuity,
Resistance to Ground, Short Circuit and Polarity.
25
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