GLOW T180 - 5.4 Water Heater Inspection

Glow T180
Tankless Condensing Water Heater
51
5.4 Water Heater Inspection
In order to ensure that the water heater operates
efciently and safely, it is recommended that the
appliance is inspected by an authorized technician at
least once a year.
The following operations should be carried out
annually:
Δ Check the condition of the gas seals and replace
where necessary.
Δ Check the condition of the water seals and
replace where necessary.
Δ Visually inspect the condition of the combustion
chamber and ame.
Δ When required, check that the CO
2
is set to
the specied range as listed in the section 4.6
Adjusting the gas Throttle.
Δ Check the condition and operation of the ignition
and gas safety systems. If necessary, remove
and clean the scaling from the ignition and ame
detection electrodes, paying particular attention
to place them at the correct distance from the
burner.
Δ Check the heating safety systems: temperature
limit safety thermostat, pressure limit safety
device.
Δ For safety reasons, periodically check the
integrity and operation of the exhaust system.
Δ Check that the connection to the main electricity
supply complies with that reported in the water
heater’s instruction manual.
Δ Check the electrical connections inside the
control panel.
Δ Check the D.H.W ow rate and temperature.
Δ Check that the condensate drain system is
working correctly, including any parts of the
system outside the water heater such as
condensate collection devices along the length
of the ue and/or any acid neutralizing devices.
Δ Check that the condensate ows freely and that
there are no exhaust fumes present within the
appliance.
Warranty will not be offered if recommended
maintenance is not followed.
Δ Close the HOT water service valve and open the
HOT water isolation valve and restore to normal
operating conditions. When both isolation
valve handles are in the open position, water is
present at the drain valves. Therefore, both HOT
and COLD drain valves MUST remain closed
and capped during system operation!
Δ It may be necessary to clean the Inlet Water
Screen once the ushing procedures have been
completed.
Δ Annually inspect all connections for signs of
leakage. Correct as necessary.
Isolation valve handles should be in
the FULL-OPEN position under normal
operating conditions. Both red and blue
handles should be parallel with the valve
body and piping or tubing.
The following steps are required when
de-scaling and ushing the tankless water
heater. (g. 5.1)
Δ Both HOT outlet and COLD inlet isolation valves
must be closed whenever the HOT and COLD
drain valves are uncapped and opened.
Δ Before removing the tethered caps of the drain
valves to attach hoses, ALWAYS verify that the
drain valves are completely closed. The tethered
caps are designed to keep debris from entering
the drain valves’ ends. They are not designed to
contain continuous pressure.
Δ Flushing and de-scaling involves connecting a
pump that is submerged in a bucket of vinegar
to the water heater via hoses, and circulating
vinegar through the heat exchanger. Any
scaling inside the heat exchanger will exit and
collect inside bucket.
Δ Prior to operating the pump, the main isolating
valves for the HOT and COLD water must be
closed.
Δ Open the service valves and activate the pump
allowing white vinegar to circulate through the
heat exchanger for approximately 20 minutes.
Δ Close the COLD water service valve and open
the COLD water isolation valve and allow fresh
water to circulate through the heat exchanger
while exiting from the HOT water service port
into the bucket.