Checking the hot water delivery temperature,
pressure and flow
Individually open each hot water tap or fixture in the house
and check that hot water is available and that there is sufficient
flow or pressure. Ensure that any fixtures designed primarily
for the purposes of personal hygiene (e.g. bathroom, ensuite)
do not supply hot water above 50°C and adjust the tempering
valve as necessary. If the hot water system is gas boosted,
check the installation manual supplied with the gas continuous
flow hot water heater to determine if it is operating correctly
and for any other specific commissioning instructions. Clean
any filters installed in the water system of the premises or at
the individual fixtures as they may have been become blocked
by debris during the installation and commissioning of the hot
water system.
filter
Now that commissioning has been completed and the
solar hot water system has been setup to operate correctly,
select the specific components of the hot water system in
the user manual. Fill out your details, the serial numbers, the
installation date and any important notes to the customer.
The user manual (and the gas continuous flow user manual if
the system is gas boosted) is to be handed to the customer
or left in a suitable location on the premises. If the customer
is available, they are to be instructed on the safe and correct
operation of the hot water system.
If the flow sensor is to be removed after the optimal
circulating flow rate is set, close the isolation valve on the
inlet piping. Drain the water out of the system by activating
the relief valve. Remove the flow sensor from the circuit
and re-connect the collector array piping, leaving the flow
restrictor in place.
Open the isolation valve on the inlet piping and refill the
system with water, ensuring that all air is bled as per the
instructions provided. The solar hot water system is now
setup to run at the optimal circulation flow conditions in
order to gain the maximum energy savings.
Note: If enough circulating flow cannot be achieved it may be
necessary to reduce the number of bends in the pipe work
between the collectors and the storage tank or to increase
the diameter of the piping. An auxiliary pump may also need
to be installed.
Electric boosted solar hot water system
If the hot water system is electric boosted, turn on the power
supply to the storage tank element. If the element is wired
to an off peak tariff, it may need to be temporarily wired at
the switchboard to a continuous power supply in order to
heat the water for commissioning by a qualified electrician.
Wait until the water inside the storage tank is up to the
pre-set temperature of 60°C. This may take up to two hours
depending on the size of the storage tank, the temperature
of the supply water and the amount of hot water heated by
the collector array.
Gas boosted solar hot water system
If your hot water system is gas boosted, plug in and switch
on the power supply to the gas continuous flow hot water
heater. Open any gas or water isolation valves located on the
inlet to the gas continuous flow hot water heater.
Commissioning
Kelvinator solar hot water systems
commissioning 27
