Monessen Hearth GG18NV Instructions

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Monessen • Hi/Lo Variable Flame Height Kit/Remote Control Instructions • 4606-901 Rev. B • 06/18

• This kit must be installed by a qualied

service agency.

Hi/Lo Variable Flame Height Kit and Remote

Control Instructions

Models: GG18NV, GG18PV, GG24NV, GG24PV, NB18NV,

NB18PV, NB24NV, NB24PV

Kit Contents:

- Hi/Lo SIT Stepper Motor (820 NG-3.5 for Natural Gas,

820 LP-10 for Liquid Propane).

- Pro-Flame Receiver Kit.

- Pro-Flame Transmitter (Remote).

- Pro-Flame Wire Harnesses.

- Installation Instruction.

Tools Required:

- Gloves.

- Torx T20 Safety Driver.

- Small Flathead Screwdriver.

Check to make sure that all parts have been received

and are correct. If not, contact your dealer before

beginning installation.

CAUTION

Before installing kit:

• Shut off gas supply

• Allow unit to cool

This Hi/Lo kit shall be installed by a qualied service

agency in accordance with manufacture’s instructions.

If all information in these instructions is not followed

exactly, a fire, explosion or production of carbon

monoxide may result causing property damage, personal

injury or loss of life.

The qualied service agency is responsible for the proper

installation of this kit. The installation is not complete

until operation of the appliance is checked as specied

in the manufacturer’s instructions supplied with the kit.

LOGS MAY BE HOT TO THE TOUCH. HANDLE

THE LOGS WITH GLOVES AND PLACE THEM ON

A NONCOMBUSIBLE SURFACE WHEN THEY HAVE

BEEN REMOVED FROM THE UNIT.

WARNING

1. Remove the logs from the unit and set aside.

2. Using a Torx T20 driver, remove and discard the

regulator and rubber gasket in the face of the valve.

Refer to regulator instructions provided with the Hi/Lo

stepper motor included in your kit .

3. Using a Torx T20 driver, Install the Hi/Lo stepper motor

with rubber gasket from Hi/Lo kit. Make sure the gasket

is sealed properly.

4. Disconnect the two (2) female connectors for the log

switch from the TP/TH and TH terminals on the control

valve.

5. Connect the 14-pin female connector from the wire

harness provided with your kit to the 14-pin male

connector on the back of the receiver that is also

provided with your kit.

Other manuals for Monessen Hearth GG18NV

Installation & Owner's Manual73 pages

Installation And Owner's Manual74 pages

Questions and Answers:

E
ewilliamsAug 16, 2025
Why does my Monessen Hearth GG18NV smell like gas even when it's off?
- R
  Randall MelendezAug 16, 2025
  If you smell gas even when the control knob of your Monessen Hearth Indoor Fireplace is in the OFF position, it could be due to a gas leak. You should locate and correct all leaks. Another potential cause is a defective control valve, which would require replacement.
D
Danielle HarveyAug 19, 2025
What to do if my Monessen Hearth Indoor Fireplace sparks but doesn't ignite?
- L
  Lindsey SweeneyAug 19, 2025
  If your Monessen Hearth Indoor Fireplace shows a spark at the ODS pilot when the ignitor button is pressed, but there's no ignition, make sure the gas supply is turned on and the manual shutoff valve is open. Also, check that the control knob is in the PILOT position and pressed in. If there's air in the gas lines from a recent installation, keep holding down the control knob and repeat the ignition process to remove the air. The ODS/pilot may be clogged, in which case it should be replaced or serviced. Finally, verify that the gas regulator setting is correct, checking the incoming pressure and replacing the regulator if needed.