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XTS Series - 4" Tube Heater Installation, Operation, Maintenance and Parts Manual
XTS Series
Electrical Requirements
♦ 120 Volt - 60 HZ
♦ Starting Current 4.8 Amps
♦ Running Current 1.1 Amps
Gas Requirements
♦ Manifold Pressure
• Nat. 3.5''
• LP. 10.0''
♦ Minimum Inlet Pressure
• Nat. 5.0''
• LP. 11.0''
♦ Maximum Inlet
• Nat. 14.0'' • LP. 14.0''
Ventilation Requirements
♦ Consult the generic supplement for venting instructions
and unvented operation.
♦ For unvented operation, there must be a positive
displacement of at least 4.0 CFM per 1000 BTU/H for
natural gas or 4.5 CFM per 1000 BTU/H for LP gas. WVE-
4 termination cap must also be used.
♦ Maximum vent length for all models is 20 ft.
Approved & Required Vent Caps
Sidewall Single
♦ 4'' Duravent sidewall vent kit (4-DSK).
♦ 4'' Vent terminal (SWD-4).
Sidewall Dual (Sharing common t-stat)
♦ 6'' Duravent sidewall vent kit (6-DSK).
♦ 6'' Vent terminal (SWD-6).
Roof Single
♦ Approved 4'' rooftop raincap (RVC-4).
Roof Dual (Sharing common t-stat)
♦ Approved 6'' rooftop raincap (RVC-6).
Important: Do not use sidewall caps for roof venting and do
not use roof caps for sidewall venting.
V.6/03
air
Theory of Operation
·
Starting Circuit
When voltage is applied to L1 and L2 (see diagram
on right), a circuit is completed from L1 via the
blower motor to L2. The blower fan is mounted in
the control box and rated to supply sufficient air for
combustion.
Air pressure generated by the blower will cause
the normally open differential pressure switch to
close. Another circuit is completed from L1 to the
hot surface ignition control and back to L2. There
is a five second delay, then the glo-bar is powered.
After the glo-bar has been powered for 45
seconds, the control causes the gas valve to open
and initiates the ignition trial.
Power to the glo-bar is shut off during the last two
or three seconds of the ignition trial.
·
Running Circuit
After ignition, the flame rod monitors the flame. As
long as a flame is present, the valve is held open.
If the flame is lost, the control acts to close the valve
within one second, and a new trial sequence
identical to that at start-up is initiated. If proof of
flame is not established within 8.5 seconds, the
unit will lock out. If lockout occurs, the control can
be reset by briefly interrupting the power source.
4
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