AquaMAX EM50 Series - Manual (Page 29)

28
3. Close each hot water tap after all air is purged (when air is purged
water will run freely without air bubbles or spluttering).
4. Check all plumbing connections for leaks.
5. Switch on electrical supply to water heater and switch on water heater
isolating switch (if one is installed).
Explain to the householder, or a responsible officer, the functions and
operation of the water heater.
Leave this guide with the householder or responsible officer upon
completion of the installation and after commissioning.
To Turn OFF the Water Heater
Sometimes it is necessary to turn off the water heater after installation and
commissioning. This may be required on a building site or where the
premises are vacant.
To turn off the water heater:
1. Switch off electrical supply to the water heater. This can be performed
at the switchboard or water heaters isolating switch if one is installed.
2. Close cold water isolation valve on cold water line to water heater.
Draining the Water Heater
Warning: Water discharged from the water heater during this
procedure may be of a very high temperature. Wear personal protective
equipment (PPE) to reduce the risk of scalding.
To drain the water heater:
1. Switch off electrical supply to water heater. This can be performed at
the water heaters isolating switch if one is installed.
2. Close cold water isolation valve on cold water line to water heater.
3. Close all hot water taps in premises.
4. Operate PTR valve lever for a period of five (5) seconds to release
pressure in water heater.
Note: Operate lever gently and do not let
lever snap back or you will damage relief valve seat.
5. Undo union at cold water inlet to water heater and attach a hose to
water heater side of union. Run other end of hose to a drain.
6. Operate PTR valve lever until all water has drained from water heater.
Operating PTR valve lever will let air into the water heater which will
allow water to drain through hose.