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GAS CONNECTIONS
CAUTION: Gas supply connections and any pipe joint compound must be resistant to the
action of propane gases.
The HO300G is an indirect gas-fired oven, consisting of a heat exchanger with eight independent,
U-shaped tubes, each with a separate in-shot burner rated at 11,875 BTU/hr for a total input of
95,000 BTU/hr.
1. Verify that the gas supply matches the type on the data plate located behind the right-side service
panel. If line pressure exceeds
1
/2 psig (3.45 kPa) 14" W.C. (water column), install a pressure
regulator before the oven’s gas valve.
a. The arrow on the pressure regulator shows the direction of the gas flow. The pressure
regulator must be mounted horizontally for proper preset outlet pressure. If the regulator is
installed in any other position, the outlet pressure must be reset for proper operation.
2. Codes require installation of a gas shutoff valve in the gas line ahead of the oven. The gas supply
line must be at least the equivalent of
3
/4" iron pipe. Corrugated lines should not be used.
3. A manual gas shutoff valve is located behind a slide-up access door, located at the bottom of the
front control panel. Verify that the shutoff valve is in the OFF position before connecting the
incoming gas line to the oven.
4. Connect the gas supply line to the
3
/4" NPT incoming gas connection, located at the rear of the
oven. Make sure the pipes are clean and free of obstructions. If oven is supplied with a flexible
gas line, secure it to oven and wall per instructions in gas line package.
5. Verify that the line pressure before the gas valve stays between 5" and 14" W.C. for natural gas,
or 11" and 14" W.C. for propane gas - with and without the burner firing.
WARNING: PRIOR TO LIGHTING, CHECK ALL JOINTS IN THE GAS SUPPLY LINE FOR LEAKS.
USE SOAP AND WATER SOLUTION. DO NOT USE AN OPEN FLAME.
TESTING THE GAS SUPPLY SYSTEM
When gas supply pressure exceeds
1
/2 psig (3.45 kPa), the oven and its individual shutoff valve must
be disconnected from the gas supply piping system.
When gas supply pressure is
1
/2 psig (3.45 kPa) or less, the oven should be isolated from the gas supply
system by closing its individual manual shutoff valve.