UK INST. INSTRUCTIONS - CONNECTIONS
Water Connection.
For all closed systems (with flow and return or tank) the system must incorporate an un- vented kit with the components shown below. The safety relieve valve must discharge safely into a suitable drain via tundish.
Expansion Safety
Vessel Relief
Valve
Mains
Isolation Y- Strainer | Pressure | Double |
Valve | Reducing | Check |
| Valve with | Valve |
| Gauge |
|
Tundish
Gas Connection
Refer to BS6891 (Natural Gas) and BS5482 (Propane) for guidance on correct pipe sizing calculation. There must be 20 mbar Natural Gas (G20) or 34.5 mbar Propane (G31) at the inlet of the appliance with all appliances at high fire.
Electrical Connection
The heater electrical supply must be installed to the latest I.E.E regulations. If the unit is hard wired (moulded plug removed) it must be provided with a fused (3A) local isolator with a contact separation of 3mm minimum on all poles for servicing. Observe polarity and ensure that wiring is correctly restrained.
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