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. Sucient 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.
07
Exhaust fan
DRAWING 01
Air inlet
There shall be an air inlet and
an exhaust outlet
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