37
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Burner Assembly
Gas Valve
Assembly
Orifice
Figure 63
Millivolt and Electronic Ignition System
Appliances
Step 6.
SIT Systems
- Refer to
Figure 64
and the instructions provided with the SIT
Regulator Conversion Kit. Using a Torx T20
driver (with 1/4" shank and center hole) or
slotted screwdriver, remove and discard the
pressure regulator mounting screws (two
screws for electronic models, three screws
for millivolt models), pressure regulator tower,
the diaphragm assembly (if applicable) and
the spring. Discard all removed components.
Step 7.
Install the new pressure regulator as-
sembly using the supplied screws as shown
in
Figure 64
. Tighten the screws to 25 in-lb.
Step 8.
Install the enclosed identification label
to the valve body where it can be easily seen.
* Standard size installed at factory
• Part /Cat. Number
Figure 66
Burner Orifice Sizes
Elevation 0-4500 feet ( 0-1372 meters)
Model
Series
Nat.Gas
drill size (inches)
Propane
drill size (inches)
40"
#40 (0.0980")*
69L96 •
#53 (0.0595")*
39L10•
45"
#37 (0.1040")*
24M10 •
(0.0620")*
21L01 •
Table 9
Step 10
. (Refer to
Figure 63
)
Remove the orifice from the manifold and
replace it with the one provided in the kit. See
the following table for orifice sizes for natural
and propane models
. Figure 66
illustrates
the orifice.
Use pipe joint compound or Teflon tape on all
pipe fittings before installing (ensure propane
resistant compounds are used in propane ap-
plications, do not use pipe joint compounds
on flare fittings).
Step 11
. Retrieve the burner and hold the
venturi tube above the orifice . Place the
shutter adjusting rod in the propane slot of
the shutter arm (see
Figure 62 on Page 31)
.
Set the burner assembly into its position and
secure the trapezoidal plate with the two screws
previously removed.
Step 12
. Reinstall the baffle with the two baffle
securing screws.
Step 13.
Reassemble the remaining compo-
nents by reversing the procedures outlined in
the preceding steps.
Step 14.
Attach the conversion label provided
in the conversion kit next to the rating plate on
the appliance.
Step 15.
Turn on gas supply and test for gas
leaks (refer to
Page 28
).
Step 16
. Relight the main burner. The lighting
instructions can be found on the lighting label
in the control compartment or in the Care and
Operation Manual provided with the appliance.
Verify proper burner ignition and operation. See
Burner Adjustments and Burner Flame Appear-
ance on
Pages 32 and 33
.
Step 17.
Inspect the pilot system for proper
flame. The pilot flame should engulf the flame
sensor as shown in
Figures 52 and 53
on
Page 28
.
Step 18
. Using a manometer, test the inlet and
manifold gas pressures. See
Tables 2 and 3
on
Page 6
.
ALWAYS TEST PRESSURES WITH THE VALVE
REGULATOR CONTROL AT THE HIGHEST
SETTING.
Figure 64 - Regulator Conversion
Pressure
Regulator
Remove
These
Components
Electronic Valve
Millivolt Valve
Step 9.
Refer to
Figure 65
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 65 - Millivolt Pilot
(electronic pilot is similar)
Installation and Operation Instructions
900357-00, 06/2015
Innovative Hearth Products
Superior
TM
DRT40 Direct Vent Gas Fireplace
