Eco-King HWB-299, Инструкция по установке и обслуживанию

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E93.1801EN171 HWB installation manual 110
WARNING
During maintenance, the following
items in bold listed below
of the water heater must be checked and inspected.
NOTICE: Before starting to work on the water heater:
•
Switch off the electrical power to the water heater (service switch and/or unplug water heater)
•
Close the gas valve to block gas supply to the water heater
Customer comments
Comments and remarks from the customer should be analyzed and used to find possible causes for any occurring
problems and complaints.
Service history
The operational and fault history (total amount and since the last service)
can be viewed in the water heater con-
trol.
This information can be used to specify the maintenance and service proceedings in relation to the water
heater (parts).
Water heater History
Successful Ignitions 32
Failed Ignitions 10
Flame Failures 0
Operation Days 0 days
▼
Water leakage
The water pressure of the heating installation should be more than 21 psi (1.0 bar) and at a maximum of 45 psi
(4.0 bar) in normal operation. When the water pressure drops below the minimum occasionally, there might be a
water leak. Check the water heater and the complete heating installation for any water leakages and have these
repaired. Higher water pressures are allowed with the use of a different relief valve and a pressure switch kit
Flue gas & air supply
The flue gas pipes and the air supply pipes must be checked for gas tightness. Also check if the mounting of these
pipes is correct, safe and not damaged. Check the top side of the water heater housing for signs of water leakage
and traces of water coming from the air supply pipe, the air vent or any condensate coming from the flue gas pipes.
Check to ensure the flow there are no obstructions for the exhaust venting or the intake combustion air venting.
Check that all intake and exhaust venting has been properly reassemble and sealed before leaving the job site
Gas supply & safeties
The gas pipes must be checked for gas tightness. Also check if the mounting of these pipes is correct, safe and
not damaged. Any built-in safeties should be checked for a correct functioning. Any gas pipe or fitting that have
been opened or adjusted should be checked for leaks.
Remove complete burner unit
The complete water heater unit consists of the fan, venturi, gas valve, the burner plate and the internal burner. To
make more space to dismantle the complete burner unit pull down the burner controller unit.
To remove this part for an internal heat exchanger check: remove the six M6 nuts, the ignition cable and the
thermal fuse cables. Close the gas tap under the water heater and loosen the gas coupling by untighten the swivel
joint under the gas valve. Remove the air intake pipe from the venturi.
After this, take out the complete burner unit by moving it forward out of the water heater housing. NOTICE: Watch
out not to damage the burner plate insulation during this operation.
While removing the complete burner unplug both of the electrical and controlling cables of the fan. After all this
dismantle the venturi on the suction side of the fan and check the blade wheel of the fan.
Warning
Crystalline Silica – Read instructions of § 19.2 carefully
Checking Non-return Valve (NRV)
The non-return valve is placed directly after the fan and has to be replaced every year during maintenance. Re-
place the non-return valve by removing the 4 nuts that are holding the fan. All the parts included in the NRV
maintenance kit must be replaced the gaskets, NRV seat, lock nuts, and non-return valve, do not reuse any of
the old parts.
Reassemble the Non-return valve to the burner unit be sure that the nuts are tightened again so no air/gas mixture
is leaking into the cabinet. Check during startup of the water heater to ensure no gas mixture is leaking on these
gaskets near the non-return valve.
Replace parts 1 to 5 of the check valve once a year.
Needed tools: Wrench 55, 10 and 8 mm, Hex key 5 mm