Lennox MLDVT-30NM Installation Instructions Manual page 38

LENNOX HEARTH PRODUCTS • MERIT
Burner Assembly
Gas Valve
Assembly
Figure 55
Millivolt Appliances
Step 5. SIT Systems - Refer to Figure 55 and
the instructions provided with the kit. Using
a Torx T20 (with 1/4" shank and center hole),
tool or standard flat screwdriver 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 regula-
tor using the new screws supplied with the kit.
Tighten screws to 25 In. lb. torque.
Pressure
Regulator
Figure 56
38
SERIES DIRECT-VENT GAS FIREPLACES • MODELS MLDVT-30/35/40/45 • INSTALLATION INSTRUCTIONS
®
Step 6. See Figure 57 and remove the pilot
hood assembly to access the hexed pilot orifice.
Remove and replace the orifice with the one
provided with the kit.
Orifice
Figure 57
Electronic Appliances
Step 7. Dexen Electronic Valves - See Figure
58 and the instructions provided with the
kit. Remove and discard the two pressure
regulator mounting screws. Remove the
pressure regulator and diaphragm. Discard
all removed components. Ensure the provided
diaphragm is installed properly onto the
replacement pressure regulator and install
the new pressure regulator using the new
screws supplied with the kit. Tighten screws.
Remove
These
Components
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Pilot
Orifice
Pressure-Tap Burner Stage
(Manifold)
Terminal
Regulator
Supply Gas
Mounting
Inlet
Screw
PILOT
HI LO
Pressure-Tap
(Inlet)
Pilot Gas Outlet Ground (TP)
Figure 58
- Dexen Electronic Gas Valve
ELECTRONIC
Sensor
Igniter
Figure 59
Gas
Outlet
To Burner
Pilot Stage
Terminal
Pilot
Hood