1. Do not place Propane/LP supply tank(s)
inside any structure. Propane/LP supply
tank(s) must be placed outdoors.
2. Heaters with a maximum input over
6,000 Btu/Hr shall not be installed in a
bathroom. Heaters with a maximum input
over 10,000 Btu/Hr shall not be installed
in a bedroom.
3. This heater needs fresh air ventilation to
run properly. This heater has an Oxygen
Depletion Sensing (ODS) safety shutoff
system. The ODS shuts down the heater
if not enough fresh air is available. See
Air for Combustion and Ventilation, pages
6 and 7. If heater keeps shutting off, see
Troubleshooting, page 20.
4. Keep all air openings in front and bottom
of heater clear and free of debris. This will
ensure enough air for proper combustion.
5. If heater shuts off, do not relight until you
have provided fresh, outside air. If heater
keeps shutting off, have it serviced.
6. Do not run heater:
• Where flammable liquids or vapors are
used or stored.
• Under dusty conditions.
MODEL
Ignition
Gas Type
BTU (available)
Pressure Regulator Setting
Inlet Gas Pressure*
(inches of water)
Gas Type
BTU (available)
Pressure Regulator Setting
Inlet Gas Pressure*
(inches of water)
Heater Dimensions (HxWxD)
Carton Dimensions (HxWxD)
Heater Weight
Shipping Weight
4
SAFETY
7. Before using furniture polish, wax, carpet
cleaner, or similar products, turn heater
off. If heated, the vapors from these prod-
ucts may create a white powder residue
within burner box or on adjacent walls or
furniture.
8. Always run heater with control knob at
PILOT/IGN, LOW (1) or HIGH (5) locked
positions. Never set control knob between
locked positions. Poor combustion and
higher levels of carbon monoxide may
result.
9. Do not use heater if any part has been
under water. Immediately call a qualified
service technician to inspect the room
heater and to replace any part of the
control system and any gas control which
has been under water.
10. Turn off and unplug heater and let cool
before servicing. Only a qualified service
person should service and repair heater.
11. Operating heater above elevations of
4,500 feet could cause pilot outage.
12. To prevent performance problems, do
not use propane/LP fuel tank of less than
100 lbs. capacity.
SPECIFICATIONS
MNSD300HGA
Piezo Ignitor
Using Natural Gas
Min. 15,000 Max. 30,000 Min. 15,000 Max. 30,000
4" W.C.
Maximum 9.5"
Minimum 5"
Using Propane Gas
Min. 15,000 Max. 30,000 Min. 15,000 Max. 30,000
9" W.C.
Maximum 14"
Minimum 11"
23
/
" × 26
/
" × 8"
1
5
2
8
25
/
" × 28
/
" × 9
3
1
4
2
27.6 lbs
32.6 lbs
www.usaprocom.com
MNSD300TGA
Piezo Ignitor
Using Natural Gas
4" W.C.
Maximum 9.5"
Minimum 5"
Using Propane Gas
9" W.C.
Maximum 14"
Minimum 11"
23
/
" × 26
1
2
/
"
25
/
" × 28
1
3
1
4
4
29.6 lbs
34.6 lbs
/
" × 8"
5
8
/
" × 9
/
"
1
2
4
200233-01B
Need help?
Do you have a question about the MNSD300HGA and is the answer not in the manual?
Questions and answers
I cant get the pilot light to light I followed the instructions correctly ??
To troubleshoot the pilot light issue on a Procom MNSD300HGA:
1. Check Gas Supply – Ensure the equipment shutoff valve is fully open.
2. Follow Lighting Instructions – Turn the control knob to OFF, wait five minutes, then try lighting the pilot again by pressing the ignitor button.
3. Manual Lighting – If the ignitor does not work, light the pilot with a match following the Manual Lighting Procedure (page 18).
4. Hold Control Knob – After lighting, keep the control knob pressed for 30 seconds.
5. Check Gas Pressure – If the pilot does not stay lit, gas pressure may be too low. Contact your gas supplier.
6. Consult Troubleshooting Guide – Refer to pages 20-24 for additional troubleshooting steps.
7. Seek Professional Help – If the issue persists, contact a qualified service technician or gas supplier for repairs.
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