Lennox Hearth SHGL-24VN-R, SHGL-18MN-R Installation, Checking Gas Connections, Gas Pressure Check

Models: SHGL-18VP-R SHGL-24MN-R SHGL-24VN-R SHGL-24MP-R SHGL-24VP-R SHGL-18MP-R SHGL-18VN-R SHGL-18MN-R

1 20
Download 20 pages 4.12 Kb
Page 6
Image 6
INSTALLATION

6

INSTALLATION

WARNING: DO NOT ALLOW FANS TO BLOW DIRECTLY INTO THE FIREPLACE. AVOID ANY DRAFTS THAT ALTER BURNER FLAME PATTERNS.

WARNING: DO NOT USE A BLOWER IN- SERT, HEAT EXCHANGER INSERT OR OTHER ACCESSORY NOT APPROVED FOR USE WITH THIS APPLIANCE.

This appliance must not be operated without a fireplace screen installed. Fireplace screens must not impair the free flow of combustion air to the appliance.

Do not burn solid fuels in any fireplace equipped with this Dual-Listed gas appliance.

WARNING: INSTALLED DECORATIVE GLASS DOOR ENCLOSURES MUST BE FULLY OPENED WHEN OPERATING THIS DUAL-LISTED GAS APPLIANCE.

Any outside air ducts and/or ash dumps that are part of the original solid fuel burning fire- place system must be fully closed and sealed at the time of installation of this Dual-Listed gas appliance.

WARNING: SPECIAL CARE IS REQUIRED IF YOU ARE INSTALLING THE UNIT INTO A SUNKEN FIREPLACE. YOU MUST RAISE THE FIREPLACE FLOOR TO ALLOW AC- CESS TO GAS LOG CONTROLS. THIS WILL INSURE ADEQUATE AIR FLOW AND GUARD AGAINST SOOTING. RAISE THE FIREPLACE FLOOR USING NONCOMBUS- TIBLE MATERIALS.

A qualified gas appliance installer must install this appliance.

Check gas type: The gas supply must be the same as stated on the appliance’s rating plate. If the gas supply is different, DO NOT INSTALL the appliance. Contact your dealer for the correct model.

Step 1. Placement of Appliance – Center the appliance in the fireplace or firebox. Make certain the grate front feet sit inside the front edge of the fireplace or firebox, and that there is adequate clearance around the appliance for access and operation.

Step 2. Connecting Gas Line – A qualified gas appliance installer must connect the dual-listed gas appliance to the gas supply.

Consult all local codes.

Route gas line using techniques and materials prescribed by local and/or national codes. Only use pipe of ¹⁄₂" or greater diameter to allow full gas volume to the gas fireplace. Undue pres- sure loss will occur if the pipe is too small.

An ANSI approved manual shut-off valve and unionmust be installedupstream oftheappliance within the fireplace cavity when rigid pipe is used.

IMPORTANT: HOLD APPLIANCE REGULATOR WITH A WRENCH TO PREVENT MOVEMENT WHEN CONNECTING TO INLET PIPING

An external regulator must be used on all propane (L.P.G.) appliances, in addition to the regulator fitted to the appliance, to reduce the supply tank pressure to 13" w.c. (maximum).

WARNING: CONNECTING DIRECTLY TO AN UNREGULATED PROPANE TANK MAY CAUSE AN EXPLOSION.

The appliance gas inlet connection is ³⁄₈" NPT at the regulator/valve, located on the left side facing the appliance. If a right side connection is required, the connection pipe may be piped under the rear of the appliance to end at the left hand side for connection to the inlet.

When tightening up the joint to the regulator hold the regulator securely with a wrench to prevent the regulator from moving.

Checking Gas Connections

Secure all joints tightly using appropriate tools and sealing compounds (ensure pro- pane resistant compounds are used in propane applications).

Turn on gas supply and test for gas leaks, using a gas leak test solution (also referred to as bubble leak solution).

Note: Using a soapy water solution (50% dish soap, 50% water) is an effective leak test solution but it is not recommended, because the soap residue that is left on the pipes/ fittings can result in corrosion over time.

Never use an open flame to check for leaks.

A. Light the appliance (refer to the lighting instructions label in the control compartment or in the Homeowner's Care and Operation Instructions).

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.

B. Brush all joints and connections with the gas leak test solution to check for leaks. If bubbles are formed, or gas odor is detected, turn the gas control knob to the “OFF” posi- tion. Either tighten or refasten the leaking connection and retest as described above.

C. When the gas lines are tested and leak free, be sure to rinse off the leak testing solution.

D. When the gas lines are tested and leak free, observe the individual tongues of flame on the burner. Make sure all ports are open and producing flame evenly across the burner. If any ports are blocked, or partially blocked, clean out the ports.

Gas Pressure Check

The appliance regulator controls the burner pressure which should be checked at the pres- sure test point (¹⁄₈" NPT plugged tap) located on the manual control valve body (on Manual models) or on the control valve itself (on Milli- volt models), identified OUT for the manifold side and IN for inlet pressure (see Figure 8 ). Ensure operating pressures are within the lim- its specified in the technical chart on page 10.

The pressure should be checked with the gas appliance burning and the control set to high.

Manual Valve

Manifold Pressure

Millivolt Valve

Inlet Pressure

Manifold Pressure

Figure 8

Page 6
Image 6
Lennox Hearth SHGL-24VN-R, SHGL-18MN-R, SHGL-24MP-R, SHGL-18MP-R Installation, Checking Gas Connections, Gas Pressure Check