User Manual

4. Low water pressure start up function:

This unit requires only 8 PSI to re, making it suitable for users with low water pressure, or

those who are using it to supply hot water to upper oors. Please note that the water ow and

water pressure are not the same. Sufcient ow is always required to keep the overheat

safety sensor from shutting the unit off.

5. Anti - freezing protection:

When the temperature is below freezing, remove the water discharge valve to discharge

accumulated standing water inside the internal pipes. This will keep the unit from freezing.

6. Anti-dry combustion protection:

Should dry combustion occur for any reason, the gas supply will be immediately and

automatically shut off.

7. Over-pressure protection:

When water pressure is over 145 PSI, the unit will automatically relieve the excessive

pressure to avoid damage to its internal components.

PRECAUTIONS:

1. The water heater must be installed in a well-ventilated area. An exhaust pipe of double

walled steel for Class 3 appliances (located at most home improvement stores in the water

heater section) must be installed to discharge the exhaust from the ame. During operation,

the water heater consumes a lot of oxygen, so the exhaust pipe and outlet hole must be

properly installed. Refer to exhaust pipe section for details.

- Failure to properly install the room intake and exhaust pipe will cause oxygen depletion in

the area around the water heater, which can cause incomplete combustion. Carbon monoxide

poisoning, death and serious accidents can occur due to incomplete combustion. ALL USERS

OF GAS APPLIANCES OF ANY TYPE SHOULD EMPLOYTHE USE OF A CARBON MONOXIDE

DETECTOR.

Exhaust fan

There shall be a air inlet

and a exhaust outlet.

Air inlet

Drawing 01