PAN BURNER

FIREBOX BOTTOM

BACK OF FIREPLACE

BURNER POSITIONING

PAN

BURNER

PILOT ASSEMBLY

Figure 29

Millivolt Appliances

Step 4. SIT Systems - Refer to Figure 30 and the instructions provided with the kit. Using a Torx T20, remove and discard the three pressure regulator mounting screws. Remove the pressure regulator, spring, poppet, diaphragm and bushing. Discard all removed components . Ensure the rubber gasket installed on the back of the replacement pressure regulator is properly positioned and install the new pressure regulator using the new screws supplied with the kit. Tighten screws to 25 In. lb. torque.

Step 5. Attach manometer to the manifold side pressure test fitting and verify manifold pressure reads 3.5 inches water column (0.87 kPa) for natural gas, and 10.0 inches water column (2.49 kPa) for propane gas.

Pressure

Regulator

Remove

These

Components

Figure 30

Step 6. Refer to Figure 31 and remove the pilot hood assembly to access the hexed pilot orifice. Remove and replace the orifice with the one provided with the kit.

Pilot

Orifice

Figure 31

Electronic Appliances

Step 7. Honeywell Electronic Valves - See Figure 32 and the instructions provided with the kit. Remove the slotted cap screw, o-ring,pressure-regulating adjusting screw and spring. Retain all parts for possible later use. Install new components from the kit. Black cap and red spring for propane gas units. Silver cap and stainless steel spring fro natural gas units.

Before installing the cap, attach manometer to the manifold side pressure test fitting and adjust screw until pressure reads 3.5 inches water column (0.87 kPa) for natural gas, and

10.0inches water column (2.49 kPa) for propane gas.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

CONTROL

OFF ON

Inlet Pressure Test Port

 

 

I

ETINGI

 

 

 

 

ISP

Manifold

Pressure

Test Port

Slotted

Cap

Spring

Adjusting

Screw

Figure 32

See Figure 33 and replace the pilot orifice as follows: Remove the ignitor assembly retainer clip, and carefully remove the ignitor assembly.

Exercise extreme care to prevent damage to or breakage of the ignitor assembly. Remove the screw securing the pilot assembly to its mounting bracket. Back off the flare nut at the end of the pilot gas line to free the pilot assembly from the gas line. Remove the pilot orifice and replace it with the one provided with the conversion kit. Reinstall the pilot assembly by reversing the steps detailed here.

When reinstalling the ignitor assembly, use extreme care to prevent damage and break- age. Do not apply any leverage to the ignitor assembly while restoring the retainer clip to its original position.

Pilot

PilotAssembly

Orifice

Ignitor

Assembly

 

Retaining

Flare Nut

Clip

Note: If the ignitor is damaged, a replacement kit is available, order Catalog Number 87L54.

Figure 33

17