Pilot

Orifice

Figure 29

Step 6. All Millivolt Systems – 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.

Step 7. Refer to Figure 29 and remove the pilot hood assembly to access the hexed pilot orifice. Remove and replace the orifice with the one provided with the kit.

Electronic Appliances

Step 8. Honeywell Electronic Valves - See Figure 31 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

3.5inches water column (0.87 kPa) for natural gas, and 10.0 inches water column (2.49 kPa) for propane gas.

CONTROL

Inlet Pressure Test Port

OFF ON

 

I

ETINGI

 

 

ISP

Manifold

Pressure

Test Port

Slotted

Cap

Spring

Adjusting

Screw

Figure 31

See Figure 30 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.

All Models

Step 9. Unscrew the orifice from the manifold and replace it with the one provided with the kit, #49 (0.073) for natural gas units and (0.045) for propane (Figure 32 ).

Figure 32

Pilot Assembly

Step 10. Reassemble all removed components by reversing the procedures outlined in the preceding steps. Use pipe joint compound or Teflon tape on all pipe fittings before installing (ensure propane resistant compounds are used in propane applications, do not use pipe

Pilot Orifice

Ignitor

Assembly

Retaining

Clip

joint compounds on flare fittings).

Step 11. Attach apropriate conversion kit label (Figure 33 ) to the rating plate on the appliance.

THIS APPLIANCE HAS BEEN CONVERTED TO:

NATURAL GAS

Flare Nut

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

Figure 30

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

INPUT BTU/HR – 15,000

MANIFOLD PRESSURE – 3.5"

ORIFICE SIZE – #49 (0.073)

THIS APPLIANCE HAS BEEN CONVERTED TO:

PROPANE/LPG

INPUT BTU/HR – 15,000

MANIFOLD PRESSURE – 10"

ORIFICE SIZE – (0.045)

Figure 33

Step 12. Turn on gas supply and test for gas leaks.

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