Superior SDV35 User Manual

Page 37

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Step 6. See Figure 60 and remove the pilot

hood assembly to access the hexed pilot orifice.

Remove and replace the orifice with the one

provided with the kit.

Use a 7/16" open end wrench and turn the

pilot hex fitting counter-clockwise 1/4 turn.

(See Figure 63).

Note - The orifice strip tab may be randomly

located on any side of the hex fitting.

c. Push the orifice strip tab all the way

against the hex fitting to align the appropri-

ate gas type orifice (see Figures 62 and 63).

The type of gas for which the pilot is set,

is, the gas type shown on the tab.

d. Retighten, clockwise, the pilot hex

fitting until the pilot hood aligns with the

thermocouple and thermopile as indicated

by the arrows shown in Figure 63.

Adjusting Knob

Conversion screw

(blue natural gas;

red LP/propane gas)

Regulator Cap

Honeywell Millivolt Gas Valve

Figure 61

Pilot for Honeywell Millivolt Gas Valve

Figure 62

b. Convert the pilot orifice as follows (see

Figures 62 and 63):

Note - use extra care not to engage the

orifice strip with the 7/16" open end wrench

(contacting the orifice strip could cause strip

distortion rendering the pilot inoperative).

Also avoid wrench contact to any of the

other pilot parts.

Millivolt Appliances

Step 7 - Honeywell Systems

a. Convert the gas valve as follows

(see Figure 61): Remove the plastic protect-

ing cap. Remove the gas type setting screw

by turning it counterclockwise. Obtain the

replacement gas type setting screw from the

kit and screw it into place (red for propane

and blue for natural gas). Tighten the gas type

setting screw by turning it clockwise. Replace

the plastic protecting cap.

Pilot for Honeywell Millivolt Gas Valve

(Loosening of Hex Fitting For

Orifice Strip Tab Positioning)

Figure 63

7/16 in. Open

End Wrench

Hood

Alignment

Orifice

Strip Tab

Take care not to contact the orifice strip tab

with the hex fitting wrench - distortion of the

tab may render the pilot inoperative.

LP (propane) Gas Posi-

tion - 1/16 inch hole,

LP and red color shown

on tab.

Natural Gas Position

- NAT shown on tab.

Top View of Hex Fitting and Orifice Strip Tab

Orifice Strip Tab Position Identification

For LP (propane gas) and Natural Gas

NAT

Pilot for SIT Millivolt

Gas Valve

Figure 60

Pilot
Orifice

Figure 64 - Burner Orifice

Step 9. Reassemble the remaining components

by reversing the procedures outlined in the

preceding steps.

Step 10. Attach the conversion label provided

in the conversion kit to the rating plate on the

appliance.

Step 11.Turn on gas supply and test for gas

leaks. See Test All Connections For Gas Leaks

on Page 27.

Step 12. Attach manometer to the manifold side

pressure test fitting and verify manifold pres-

sure reads 3.5 inches water column (0.87 kPa)

for natural gas, and 10.0 inches water column

(2.49 kPa) for propane gas.

ALWAYS TEST PRESSURES WITH THE VALVE

REGULATOR CONTROL AT THE HIGHEST

SETTING.

Step 8. (Refer to Figure 64)

VERIFY THE PROPER ORIFICE SIZE BE-

FORE INSTALLING IT.

Remove the burner orifice from the manifold

and replace it with the one provided with the

kit. See Table 10 for orifice sizes required for

use with natural gas or propane gas. Figure 64

illustrated the orifice. Use pipe joint compound

or Teflon tape on all pipe fittings before install-

ing (ensure propane resistant compounds are

used in propane applications, do not use pipe

joint compounds on flare fittings).

Burner Orifice Sizes

Elevation 0-4500 feet ( 0-1372 meters)

Model

Natural

Gas

drill size (inches)

Propane

Gas

drill size (inches)

SDV35

2.3 mm (.090")

37L70 •

#54 (.055")

99K79 •

* Standard size installed at factory
• Part /Cat. Number

Table 10