Lochinvar 000 - 260, 45 Gas Manifold Pressure Adjustment Procedure, 3Gas connections, 2 Wrench

3Gas connections

Installation & Service Manual

APPLY WRENCH TO FLANGE ONLY

WHEN FLANGE

IS USED

WHEN FLANGE IS

NOT USED

APPLY WRENCH FROM TOP OR BOTTOM OF GAS CONTROL TO EITHER SHADED AREA

1.	Turn the power “OFF” at the main disconnect switch.
2.	Turn gas valve control knob to “OFF” position.
3.	Remove the 1/8" hex plug located on the outlet side of the
	gas valve and install a fitting suitable to connect to a
	manometer or magnahelic gauge. See FIG. 3-3. Minimum
	range of scale should be up to 5" w.c. for Natural gas
	models and 10" w.c. for L.P. gas models.
4.	Remove the pressure regulator adjustment cap screw on
	the gas valve. See FIG. 3-3 for location.
5.	Turn the power “ON” at the main disconnect switch.
6.	Turn gas valve control knob to “ON” position.
7.	Set the thermostat(s) to call for heat.

Figure 3-2_Wrench

8.For L.P. gas, consult your L.P. gas supplier for expert installation.

8.	Observe gas regulator pressure when all burners are firing.
	See Table 3B, Manifold Pressure (page 18) for proper
	regulator pressure settings.
9.	If adjustment is necessary, turn regulator adjustment screw

IMPORTANT

Upon completion of any piping connections to the gas system, leak test all gas connections with a soap solution while system is under pressure. Immediately repair any leaks found in the gas train or related components. Do Not operate an appliance with a leak in the gas train, valves or related piping.

clockwise to raise regulator gas pressure, counterclockwise

to lower gas pressure, to proper setting. NOTE: Adjustment

fitting is plastic and may require slightly greater turning

force than a metal fitting.

10. Turn the power “OFF” at the main disconnect switch.

NOTICE	Do not increase regulator pressure beyond
	specified pressure setting.

Gas Manifold Pressure Adjustment Procedure

11. Turn gas valve control knob to “OFF” position.

INLET PRESSURE TAP

PRESSURE REGULATOR ADJUSTMENT (UNDER CAP SCREW)

OUTLET

PRESSURE TAP

PILOT OUTLET

12.	Remove fitting from the gas valve and replace the 1/8" hex
	plug that was previously removed and tighten.
13.	Turn the gas valve control knob to “ON” position.
14.	Turn the power “ON” at the main disconnect switch. The
	appliance is now ready to operate.

GAS CONTROL KNOB

RED RESET BUTTON

MANOMETER

3.5"

GAS VALVE

Figure 3-3_Manifold Pressure Adjustment

If manifold pressure can not be properly adjusted, use the procedure on page 21 to check gas supply pressure with a manometer connected to the inlet pressure tap on the gas control.

20