Commercial Air to Water Heat Pump Water Heater
45
COMMISSIONING
TO FILL AND TURN ON THE
WATER HEATER
The power supply to the water heater and
controller must not be switched on until the
water heater is filled with water and a satis-
factory megger reading is obtained.
WARNING: This water heater contains elec-
tronic equipment and 500 V insulation tests
must only be conducted between actives
and earth and between neutral and earth. An
active to neutral test WILL damage the elec-
tronics.
COMMISSIONING PROCEDURE
– STANDALONE HEAT PUMP
CONFIGURATION
• Perform this procedure to commission a single
(standalone) heat pump.
• If the system is comprised of multiple standalone
heat pumps, perform this procedure for each heat
pump.
• Open all of the hot water taps in the building (don’t
forget the showers) and supply valves in the system.
• Open the valves fully on the cold, return and hot water
branches to the storage tanks.
• Open the main cold water valve.
• Air will be forced out of the taps.
• Close each tap as water flows freely from it.
• Check the pipe work for leaks.
• Switch on the electrical supply at the isolating switch
to the water heater.
• Set time/tariff control if required.
• Reset alarms. Skip this step if there are no alarms.
If the water heater is full of cold water, the fan will activate
and heating will commence unless the ambient air tem-
perature is below the ambient sensor setpoint, in which
case the auxiliary boost will operate, if installed.
It is important to wait for five minutes after the heat pump
has activated to ensure it continues to operate and is
functioning correctly.
NOTE: The water heater may not turn on immediately
when it is first switched on, if it is switched on within 20
minutes to 2 hours of it having been switched off at the
isolating switch, or the heat pump has just completed
a heating cycle. The water heater will wait until the
conditions for start-up are favorable in order to protect
the compressor from damage. This may take up to 20
minutes to 2 hours. The auxiliary booster (if installed)
will operate instead of the heat pump if the ambient air
temperature is less than the ambient sensor setpoint.
Explain to a qualified technician the functions and opera-
tion of the heat pump water heater. Upon completion of
the installation and commissioning of the water heating
system, leave this guide with the qualified technician.
COMMISSIONING PROCEDURE
– MULTIPLE HEAT PUMP
(PRIMARY/SECONDARY)
CONFIGURATION
Perform this procedure if the system is comprised of mul-
tiple heat pumps to be configured for Primary/Secondary
operation.
• Open all of the hot water taps in the building (don’t
forget the showers) and supply cocks and valves in
the system.
• Open the isolation valves fully on the cold, return and
hot water branches to the storage tanks.
• Open the main cold water valve on the cold water line
to the storage tanks.
Air will be forced out of the taps.
• Close each tap as water flows freely from it.
• Check the pipe work for leaks.
Before commencing the Primary/Secondary commission-
ing procedure, ensure the ‘Multiple Heat Pump Installation
- step 1 and step 2 have been completed as stated on
page 45.
To Next Page
Loading...
