Valves And Fittings; Commissioning - Rinnai HJ Cooper LCUS00934010 Owner And Installer Manual

Valves and fittings

Valves with pressure ratings other than those listed in this manual must not be used.
Fittings supplied with the tank
Two brass plugs, to plug unused connections, are packaged in a plastic bag inside the element cover,
and a copper riser tube (for wetback tanks) is supplied.

Commissioning

Commissioning and draining activities must be carried out by an authorised person.
To fill and turn on the water heater
1. Open all hot water taps in the house including the shower.
2. Open the cold water isolation valve to the water heater. Air will now be forced out of the taps.
3. Close each tap when water runs freely without air bubbles.
4. Check all plumbing connections and pipe work for water leaks.
5. Switch on the electric power supply.
To turn off the water heater
It may be necessary to turn off a water heater after installation and commissioning, for example during
building activities or if the premises are vacant.
1. Switch off the electricity supply at the isolating switch to the water heater.
2. Close the cold water isolation valve at the inlet to the water heater.
To drain the water heater
1. Turn off the heater, refer above.
2. Open all the hot water taps and then for valve vented (closed) installations, open the union at the
top outlet to allow air into the tank and water to drain (ensuring no damage will occur from the
discharged water).
Low pressure indoor copper owner and installer guide: 20733-C 03-13 | 15