Bryant 310JAV Installation, start-up, operating, and service and Instruction Manual download pdf (Page 23)

FOR FIG. 22C

1. Be sure gas and electrical supplies to furnace are off.

2. Remove caps that conceal adjustment screws for high-and low-heat stage gas valve regulators. (See Fig. 22C.)

3. Turn low-heat stage adjusting screw clockwise (in) 9.5 turns. This will increase the manifold pressure closer to the propane low-heat set

point.

4. Turn high-heat stage adjusting screw clockwise (in) 13.5 turns. This will increase the manifold pressure closer to the propane high-heat

set point.

5. Replace caps that conceal gas valve regulator adjustment screws.

FOR FIG. 22D

1. Be sure gas and electrical supplies to furnace are off.

2. Remove caps that conceal adjustment screws for high-and low-heat stage gas valve regulators. (See Fig. 22D.)

3. Turn low-heat stage adjusting screw (3/32-in. hex allen wrench) clockwise (in) 1 full turn. This will increase the manifold pressure closer

to the propane low-heat set point.

4. Turn high-heat stage adjusting screw (3/32-in. hex allen wrench) clockwise (in) 2 full turns. This will increase the manifold pressure closer

to the propane high-heat set point.

5. Replace caps that conceal gas valve regulator adjustment screws.

PROCEDURE 6—INSTALL LOW GAS PRESSURE SWITCH (LGPS), ALL FURNACES

NOTE: The inlet gas pipe must be disconnected from valve so pressure switch can be installed.

NOTE: Use propane-gas-resistant pipe dope on all connections to prevent gas leaks. DO NOT use Teflon tape.

1. Be sure main gas and electric supplies to furnace are off.

REGULATOR SPRING

(PROPANE – WHITE, 6 TURNS

NATURAL – SILVER, 10 TURNS)

REGULATOR

ADJUSTMENT

SCREW

REGULATOR

SEAL CAP

GAS PRESSURE

REGULATOR

ADJUSTMENT

INLET

PRESSURE TAP

ON AND

OFF SWITCH

MANIFOLD

PRESSURE TAP

A01073

Fig. 22A—Single Stage Gas Valve

REGULATOR COVER SCREW

PLASTIC ADJUST SCREW

LOW STAGE

GAS PRESSURE

REGULATOR ADJUSTMENT

(

PROPANE–WHITE, 9.5 TURNS

NATURAL–SILVER,9.5 TURNS)

MANIFOLD

PRESSURE TAP

INLET

PRESSURE TAP

ON/OFF SWITCH

REGULATOR SPRING

HIGH STAGE GAS

PRESSURE REGULATOR

ADJUSTMENT

(

PROPANE–WHITE, 13.5 TURNS

NATURAL–SILVER,12 TURNS)

A04048

→ Fig. 22C—Two Stage Gas Valve

REGULATOR

SEAL CAP

REGULATOR

ADJUSTMENT

SCREW

REGULATOR SPRING

(PROPANE - WHITE, 8.5 TURNS

NATURAL - SILVER, 8.5 TURNS)

GAS PRESSURE

REGULATOR

ADJUSTMENT

MANIFOLD

PRESSURE TAP

NLET

RESSURE TAP

ON/OFF SWITCH

A04112

→ Fig. 22B—Single Stage Gas Valve

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Bryant 310JAV Installation, start-up, operating, and service and Instruction Manual Page 23

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