Hearthstone Quality Home Heating Products, Inc
® Green Mountain Insert 70 (Model 8450)
39
Troubleshooting Guide
PROBLEM
POSSIBLE CAUSE
SOLUTIONS
INSERT SMOKES
Operating Technique
Fully open the primary air control one minute before opening doors,
and ensure the bypass is open before opening door.
Cold Chimney or reverse
draft
Preheat the chimney when first starting a fire. Briefly open a window in
the room containing the insert.
Blocked Chimney
Examine the chimney and stovepipe for blockage or creosote
accumulations.
Oversized Chimney
Reline the chimney to the appropriate diameter
Undersized Chimney
Install a draft inducer or replace the chimney.
Chimney Too Short
Lengthen the chimney.
Air Infiltration Into The
Chimney
Seal chimney connections and openings. Check clean-out doors.
Not burning proper fuel
Ensure cordwood is seasoned and dry.
More Than One Appliance
Connected to the Flue
Disconnect all other appliances and seal openings.
BACK-PUFFING
OR GAS
EXPLOSIONS
Operating Technique
Fully open the primary air control one minute before opening the door
and keep it fully open for a few minutes after reloading. Ensure the
bypass door is open before opening the door
Extra Low Burn Rate
Burn the insert at a higher burn rate.
Chimney Down-draft
Install a chimney cap.
Excessive Ash Build-up
Empty the ash pan more frequently. Increase efficiency of burns, and
avoid using poor quality or green wood.
UNCONTROLL-
ED OR SHORT
BURN
Unsealed or Open Door
Close the door tightly or replace the gaskets.
Air leakage around glass gasket
– replace gasket
Excessive Draft
Check the installation. Operate at LOW BURN. Install stovepipe
damper. Draft in excess of 0.1 wc should be corrected with a stovepipe
damper(s)
Extra Long Chimney
Shorten the chimney. Install stovepipe damper(s).
Oversized Chimney
Reline the chimney to the proper diameter.
High Winds or Hilltop
Location:
Install a chimney cap.
INSUFFICIENT
HEAT
Poor Quality, low Btu
content, or Green Wood
Use only air-dried wood, preferably dried at least one year. Use a wood
with a high Btu content if available.
Low Burn Rate
Operate the insert at a higher burn rate.
Cold Exterior Chimney
Reline or insulate the chimney.
Leaky Stovepipe or
Chimney
Check the installation. Replace with a pre-fabricated insulated chimney
system or a properly sized masonry chimney.
Too Much Heat Loss From
House
Add insulation, use energy efficient windows, or caulk windows, and
seal openings in home.
Excessive Ash Build-up
Empty the ash pan more frequently. Increase efficiency of burns, and
avoid using poor quality or green wood.
BLISTERING OF
FINISH
Operating Technique
Do not over-fire the insert. Monitor insert temperatures. Use seasoned
wood only.
Excessive Draft
Check the DRAFT. A damper may be required. Operate the insert at a
LOW BURN range.
