Eco-King HWB-299, Installation And Service Manual

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E93.1801EN171 HWB installation manual 14
Firing the water heater without water flow (but filled with water) will cause a boiling noise.
The Outlet and Inlet temperature are checked continuously. The temperature difference may not exceed the
programmed value belonging to the actual power mode. If it does, the water heater will go in a lock-out.
The applied DHW pump must be controlled only by the HW water heater control. If, for any reason,
an external pump control is applied
without written approval of Eco King , the complete warranty
on the HW water heater and all supplied parts will become invalid.
Minimum water pressure 15 psi.
Fuel used should have sulphur rates that comply with the next values: a maximum annual peak over a short
period of time of 150 mg/m
3
and an annual average of 30 mg/m
3
maximum.
Combustion air must be free of contents of chlorine, ammonia, alkali agents. The air near a swimming pool,
a washing machine or a laundry is containing these a.m. contents.
If the water heater is used in combination with a hot water tank without any other heat exchanger; the water
heater should be equipped with a safety relief valve. In some cases also the tank should be equipped with
a T&P relief valve. Always apply all applicable installation standards and regulations.
At first installation, the built-in automatic air vent should be open.
LEGIONNAIRES’ DISEASE
An anti-Legionella function is present in the software and is default turned OFF when using mode
4 (Stand Alone) and is turned ON at DHW mode 1, Cascaded boilers. (its not possible to use the
Anti-Legionella funtion at DHW mode 4.)
Pressure relief valve
This unit does not come with an approved pressure relief valve.
An approved pressure relief valve must be installed to the outlet of the water heater.
•
The pressure relief valve must conform to ANSI Z21.22 or CAN 1-4.4 and installation must follow local
codes.
•
The BTUH rating of the relief valve must not be less than the BTUH input of the heater
•
The pressure relief valve must not exceed the maximum working pressure indicated on the water heater
rating plate.
•
The discharge piping for the pressure relief valve must be directed so that the hot water cannot splash
outward and cause damage or personal injury.
•
Attach the discharge tube to the pressure relief valve and run the end of the tube to within 6 inches (152
mm) from the floor. This discharge tube must allow free and complete drainage without any restrictions.
•
If the pressure relief valve discharges periodically, this may be due to thermal expansion in a closed wa-
ter supply system. Contact the water supplier or a local plumbing professional on how to correct this
situation. Do not plug the pressure relief valve.
•
The pressure relief valve must be manually operated periodically to check for correct operation.
•
Before operating the valve manually, check that it will discharge in a place for secure disposal.
•
No valve must be placed between the relief valve and the water heater. DO NOT apply a closing valve
or any other form of narrowing, because this might disturb the correct functioning of the safety valve.
Hot water could be released when the pressure relief valve is opened. This can result in
severe personal injury. Before operating the pressure relief valve manually, check that it
will discharge in a safe place. If water does not flow freely from the end of the discharge
pipe, turn the gas supply and power OFF and call a qualified person to determine the cause.
Refer to the pressure relief valve manufacturer's instructions for inspection and mainte-
nance requirements.
WARNING