User Manual

4. Low water pressure start up function:

These unit requires 2 - 2.9 PSI to re, making it suitable for users with low water pres-

sure, 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. Sucient ow is always

required to keep the overheat safety sensor from shutting the unit o.

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 o.

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 construction for category I heating appliances, i.e. B-vent or Z-vent if

excessive condensation is a concern must be installed to discharge the exhaust from

the ame (venting supplies can be 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 deple-

tion in the area around the water heater, which can cause incomplete combustion.

Carbon monoxide poisoning, death and serious accidents can occur due to incom-

plete combustion. ALL USERS OF GAS APPLIANCES OF ANY TYPE SHOULD EMPLOY

THE USE OF A CARBON MONOXIDE DETECTOR.

Exhaust fan

DRAWING 01

Air inlet

There shall be an air inlet and

an exhaust outlet