Trane Gas Unit Heaters Wartungshandbuch
Start-Up
GHND-SVX01C-EN
27
Operation
Explanation of Controls (see
)
1.
Each Separated Combustion Unit Heater comes
equipped with a power vent system that consists of a
power venter motor and blower, pressure switch, and
sealed flue collector.
equipped with a power vent system that consists of a
power venter motor and blower, pressure switch, and
sealed flue collector.
2. The power venter motor is energized by the room
thermostat when a demand for heat is sensed. The
pressure switch measures the pressure differential
between the air inlet and exhaust vent systems. If the
differential is correct, the indirect spark ignition system
is energized.
pressure switch measures the pressure differential
between the air inlet and exhaust vent systems. If the
differential is correct, the indirect spark ignition system
is energized.
3. The indirect spark ignition system consists of an
ignition module, a dual combination valve, and a
spark-ignited pilot burner. When the pressure switch is
closed, the pilot valve opens as a spark is generated to
light the pilot. When the flame is sensed by the flame
sensing circuit, the spark ceases, and the main gas
valve is opened to supply gas to the main burners.
Once the thermostat has been satisfied, the vent
system and gas valve are simultaneously de-
energized, stopping all gas flow to the unit.
spark-ignited pilot burner. When the pressure switch is
closed, the pilot valve opens as a spark is generated to
light the pilot. When the flame is sensed by the flame
sensing circuit, the spark ceases, and the main gas
valve is opened to supply gas to the main burners.
Once the thermostat has been satisfied, the vent
system and gas valve are simultaneously de-
energized, stopping all gas flow to the unit.
4. The limit switch interrupts the flow of electric current to
the main gas valve if the unit heater becomes
overheated.
overheated.
5. The fan switch delays the operation of the fan is
delayed for approximately 45 seconds once the
thermostat is closed, and continues fan operation for
approximately 65 seconds after the thermostat opens.
thermostat is closed, and continues fan operation for
approximately 65 seconds after the thermostat opens.
Note: The start-up fan delay must not exceed 90
seconds from a cold start.
6. The wall thermostat, supplied optionally, is a
temperature sensitive switch that operates the vent
and ignition systems to control the temperature of the
space being heated.
space being heated.
Note: The thermostat must be mounted on a vertical,
vibration-free surface, free from air currents,
and in accordance with the furnished
instructions.
and in accordance with the furnished
instructions.
Initial Lighting
1.
Open the manual gas valve, in the gas supply line to the
unit heater. Loosen the union in the gas supply line to
purge it of air. Tighten the union and check for leaks.
unit heater. Loosen the union in the gas supply line to
purge it of air. Tighten the union and check for leaks.
2. Turn on the electrical power. The unit heater should
now be under the control of the thermostat. Set the
thermostat to its highest setting; the power venter
motor should start and burner ignition occur. Allow the
unit heater to operate until the fan starts, then set the
thermostat to its lowest setting. The burners and
power venter motor should stop operating
immediately while the fan continues to operate until
the fan time delay times out, shutting it off. Reset the
thermostat to the desired operational setting.
thermostat to its highest setting; the power venter
motor should start and burner ignition occur. Allow the
unit heater to operate until the fan starts, then set the
thermostat to its lowest setting. The burners and
power venter motor should stop operating
immediately while the fan continues to operate until
the fan time delay times out, shutting it off. Reset the
thermostat to the desired operational setting.
Power Vented Propeller Units with
Intermittent (Spark) Pilot Ignition
Intermittent (Spark) Pilot Ignition
Explanation of Controls
1.
The unit heater is equipped with a power venter
system consisting of a power venter motor and blower,
pressure switch, and sealed flue collector in place of
the conventional draft diverter.
system consisting of a power venter motor and blower,
pressure switch, and sealed flue collector in place of
the conventional draft diverter.
a. The power venter motor is energized by the room
thermostat on a call for heat. The pressure switch
measures the flow through the vent system and
energizes the indirect spark ignition system when
the flow is correct.
measures the flow through the vent system and
energizes the indirect spark ignition system when
the flow is correct.
WARNING
Carbon Monoxide!
Never operate unit heaters if the power venter is not
operable. Your venting system must not be blocked by
any snow, snow drifts, or any foreign matter. Inspect
your venting system to ensure adequate ventilation
exists at all times! Failure to follow these
recommendations could result in death or serious
injury due to Carbon Monoxide Poisoning (symptoms
include grogginess, lethargy, inappropriate tiredness, or
flu-like symptoms).
operable. Your venting system must not be blocked by
any snow, snow drifts, or any foreign matter. Inspect
your venting system to ensure adequate ventilation
exists at all times! Failure to follow these
recommendations could result in death or serious
injury due to Carbon Monoxide Poisoning (symptoms
include grogginess, lethargy, inappropriate tiredness, or
flu-like symptoms).
NOTICE:
Additional Devices!
The addition of external draft hoods or power venters is
not permitted. Addition of such devices could cause
severe unit malfunction or failure!
not permitted. Addition of such devices could cause
severe unit malfunction or failure!
WARNING
Hazard of Explosion!
Never use an open flame to detect gas leaks. Explosive
conditions may occur. Use a leak test solution or other
approved methods for leak testing. Before attempting
to light or relight the pilot, wait 5 minutes to allow gas
which may have accumulated in the burner
compartment to escape. Failure to follow
recommended safe leak test procedures or pilot
lighting/relighting instructions could result in death or
serious injury or equipment or property-only-damage.
conditions may occur. Use a leak test solution or other
approved methods for leak testing. Before attempting
to light or relight the pilot, wait 5 minutes to allow gas
which may have accumulated in the burner
compartment to escape. Failure to follow
recommended safe leak test procedures or pilot
lighting/relighting instructions could result in death or
serious injury or equipment or property-only-damage.
WARNING
Risk of Fire and Carbon Monoxide
Poisoning!
Poisoning!
The pressure switch MUST NOT be bypassed. The unit
MUST NOT be fired unless the power venter is
operating. Failure to follow these recommendations
could result in death or serious injury.
MUST NOT be fired unless the power venter is
operating. Failure to follow these recommendations
could result in death or serious injury.