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Napoleon · Gas fireplace troubleshooting

Test: gas inlet and manifold pressure

What is going on

Reference pressures and method for millivolt valves.

Likely causes

  • Supply or regulator out of spec

Check in this order

  1. Turn the inlet or outlet test screw 2-3 turns counter-clockwise and slip the gauge tube over the fitting.
  2. Check inlet pressure with the main burner ON to confirm adequate flow.
  3. Spec (service manual) natural gas supply 7" w.c., manifold 3.5" w.c.; propane supply 11" w.c., manifold 10" w.c. (GD70 manual lists propane inlet 13" normal / 11" minimum).
  4. Reseal screws firmly clockwise afterwards - do not over-torque; use a .150" x .030" blade screwdriver.
  5. Warning: leak-test the test ports.

Applies to: Napoleon gas fireplaces - direct vent, natural vent and vent-free (general service manual)

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Source: Napoleon (Wolf Steel) Service Manual W415-0118, Part 5 Testing & Adjustments, Testing: Pressures, p.31. Written in our own words; check the manual for your exact model.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.