TOA Electronics DIRECT VENT 600 - Manual (Page 28)

28 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Adjusting Knob
Conversion screw
(blue natural gas;
red LP/propane gas)
Regulator Cap
Honeywell Millivolt Gas Valve
Printed in U.S.A. © 2001 by Lennox Hearth Products
P/N 700,005M REV. X 11/2004
The manufacturer reserves the right to make changes at any time, without notice, in design, materials, specifications, prices and also to discontinue colors, styles and products.
Consult your local distributor for fireplace code information.
Figure 70
Step 8. 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 joint
compounds on flare fittings).
Step 9. Attach the conversion label provided
in the conversion kit to the rating plate on the
appliance.
Step 10. Turn on gas supply and test for gas
leaks.
Figure 69
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Remove the pilot orifice and replace it with the
one provided with the conversion kit. Reinstall
the pilot assembly by reversing the steps de-
tailed 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.
Note: If the ignitor is damaged, a replacement
kit is available - order Catalog Number 87L54.
All Models
Step 7. Remove the orifice from the mani-
fold and replace it with the one provided with
the kit. See the following table for orifice sizes
for natural and propane models
. Figure 70
illustrates the orifice.
Figure 68
Step 6. Electronic Appliances -
Honeywell Systems
See Figure 68 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 for 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 10.0
inches water column (2.49 kPa) for propane gas.
See Figure 69 and replace the pilot orifice as
follows: Remove the ignitor assembly retainer
clip, and carefully remove the ignitor assem-
bly. Exercise extreme care to prevent dam-
age 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.
LHP
1110 West Taft Avenue • Orange, CA 92865
Spring
Adjusting
Screw
Slotted
Cap
P S I
OFF
I
ON
CONTROL
IG N IT E
Manifold
Pressure
Test Port
Inlet Pressure Test Port
Retaining
Clip
Ignitor
Assembly
Pilot
Assembly
Pilot
Orifice
Flare Nut
D, DT,
DR Series
Natural Propane
Orifice Size
500 0.090 in. #54
600 #36 #52
800 #33 0.065 in.
Use a 7/16" open end wrench and turn the pilot
hex fitting counter-clockwise 1/4 turn. (
refer
to Figure 64 ).
e. Retighten, clockwise, the pilot hex fitting
until the pilot hood aligns with the thermo-
couple and thermopile as indicated by the
arrows shown in
Figure 64.
Note - The orifice strip tab may be randomly
located on any side of the hex fitting.
d. Push the orifice strip tab all the way against
the hex fitting to align the appropriate gas type
orifice
(refer to Figures 65 and 66). The type
of gas for which the pilot is set, is, the gas type
shown on the tab.
Step 5. Millivolt Appliances -
Honeywell Systems
a. Convert the gas valve as follows (see Figure 67):
Remove the plastic protecting cap. Remove the
gas type setting screw by turning it counter-
clockwise. 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.
b. 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.
Figure 67
c. Convert the pilot orifice as follows (refer to
Figures 64, 65 and 66 ):
Note - Use extra care not to engage the orifice
strip with the 7/16" open end wrench (contact-
ing the orifice strip could cause strip distortion
rendering the pilot inoperative). Also avoid
wrench contact to any of the other pilot parts.