ADJUSTING THE BURNER – Continued
If difficulty in adjusting the burner is experienced, it may be the result of incorrect gas supply pressure or manifold pressure. Pressure can only be checked and adjusted by a trained service technician using instruments designed for that purpose.
WARNING: Do not attempt to change pressure settings without proper training and instruments. To do so may cause your floor furnace to malfunction resulting in property damage, bodily injury, or death.
The following information is provided for use by a trained service technician with measuring instruments.
Minimum Inlet Pressure, Natural Gas……………………………………………………. | 4.5 Inches Water Column |
Minimum Inlet Pressure, Liquefied Petroleum (L.P.) Gas……………………………….. | 11.0 Inches Water Column |
Maximum Inlet Pressure for Natural Gas………………………………………………… | 7.0 Inches Water Column |
Maximum Inlet Pressure, Liquefied Petroleum (L.P.) Gas………………………………. | 14.0 Inches Water Column |
(If the inlet pressure is found to exceed 14.0 inches water column, check the performance of the control valve thoroughly as damage may have occurred. If manifold pressure cannot be adjusted, replace the control valve).
Manifold Pressure, Natural Gas………………………………………………………….. | 3.5 Inches Water Column |
Manifold Pressure, Liquefied Petroleum (L.P.) Gas…………………………………….. | 10.0 Inches Water Column |
OPTIONAL OPERATION
Your floor furnace has been designed to meet all safety requirements of the American National Standards Institute and government regulations by offering two modes of operation.
OPTION 1. Place the furnace key on the damper control rod (See Figure 21) and turn counterclockwise 
until the warning flag is concealed and the damper is open. Your floor furnace will now cycle on and off maintaining a moderate grill temperature and an even room temperature. Your floor furnace will function best on this setting during mild weather.
OPTION 1 |
|
In mild weather, |
|
operate furnace |
|
with damper open. |
|
Furnace will cycle |
|
on and off main- |
|
taining a moderate | Damper |
grill temperature | Open |
and an even room |
|
temperature. |
|
FIGURE 21
WARNING
FLOOR FURNACE GRILLS BECOME HOT WHEN FURNACE IS IN OPERATION. CONTACT OF BARE SKIN WITH GRILL MAY RESULT IN SEVERE BURNS. KEEP CHILDREN OFF, PROVIDE FENCE OR REGISTER GUARD FOR THEIR PROTECTION.
OPTION 2. Turn the furnace key clockwise 
until the warning flag reading “WARNING – GRILL IS HOT – Keep off – can cause burns” is visible and the damper is closed. The limit control will now cease to function and the floor furnace will now put out the maximum amount of heat until the room temperature reaches the thermostat setting. Use this option only in extremely cold weather. If furnace continues to cycle on limits, assure that damper door is 100% closed by adjusting damper door pin if necessary.
OPTION 2
In extremely cold weather, close damper (which exposes warning plate). Furnace will then put out maximum
amount of heat untilDamper Closed
room temperature reaches setting on wall thermostat.
FIGURE 22
LIMIT SWITCH
TEMPERATURE SETTINGS |
|
90{N,P}30A…………………….. | 140N |
90{N,P}50A…………………….. | 160N |
90{N,P}65A…………………….. | 180N |
90{N,P}75A…………………….. | 170N |
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