Valves And Fittings; Commissioning - Rinnai Smart Cylinders Series 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 cylinder
TPR valve, brass plugs, to plug unused connections, a key spanner, and
the owner and installer guide are packaged in a plastic bag inside the
element cover.
The TPR valve, valve insulation kit and instructions are supplied in a clear
plastic bag fixed to the element cover as shown. The valve insulation kit is
provided to reduce heat loss from the TPR and must be fitted.

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 the 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 water heater as above.
2. Close all the hot water taps.
3. Gently operate the TPR valve release, this will relieve the pressure in the water heater.
4. Open the drain valve—make sure no damage will occur from discharged water.
5. Operate the TPR valve again. This allows air into the water heater and will result in the water
draining.
18 | Rinnai Smart Cylinder MP indoor stainless steel: Owner & installer guide: 20430-C 03-17
TPR valve insulation kit