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In addition to the included thermostat, any dry-contact
switch or other type of control that connects the terminals
together will cause the heating elements to run. The
thermostat circuit is low voltage (24VAC). DO NOT CONNECT
POWER TO THE THERMOSTAT TERMINALS.
3 Maintenance
3.1 Air Filter
The Phoenix FireBIRD Compact 20 is equipped with a
pleated fabric air filter that must be checked regularly. The
standard filter is a MERV-11 high efficiency filter. Operating
the FireBIRD Compact 20 with a dirty or obstructed filter will
reduce airflow eventually causing the heating element to
shut off. Installing a clean filter or removing the obstruction
to restore airflow will allow the heating element to operate
again.
The filter can generally be vacuumed clean several times
before needing replacement. Replacement filters can be
ordered from the factory or purchased locally if available.
WARNING: DO NOT operate the unit without the filter or
with a less effective filter as the heating coils inside the unit
could become clogged and require disassembly to clean.
4 Service
WARNING: Servicing the Phoenix FireBIRD Compact 20 with
its high voltage circuitry presents a health hazard which
could result in death, serious bodily injury, and/or property
damage. Only qualified service people should service this
unit.
Do not operate the unit without the front cover in place. High
voltage is present, heater burnout may result.
4.1 Technical Description
The compact 20 uses a wound nichrome heating element to
provide multiple heat settings depending on the application
requirements or available power. The heating elements
are operated by contactors operated by a 24VAC control
circuit. For safety, there are a set of thermal switches that
will de-energize the heating elements if the temperature
in the element chamber rises to an unacceptable level
caused by lack of airflow or high ambient temperature. An
additional safety switch limits the incoming air temperature
to approximately 140F. This switch shuts off the heating
elements and automatically resets when the temperature
falls to approximately 130F.
4.2 Troubleshooting
Low voltage heating circuits require dedicated 15A
minimum service for each circuit (up to 4 total).
Blower not running
1. Unit unplugged, no power to outlet
2. Control Switch not working
3. Wiring fault inside device
4. Defective blower or blower capacitor
Blower running but no heat when Ok/Running lamp is on
1. Power switch is set to “Thermostat” and no thermostat
is connected, or thermostat is open
2. High temperature limit reached (140°F)
3. Heating relays not operating
4. Wiring fault inside device
5. Defective heating element, pressure switch, or
temperature limit switch
Fault/Not Running lamp illuminated
1. Press Start/Reset button
2. Reduce the length of inlet or outlet duct (if ducted)
3. Check duct for kinks or sharp bends in inlet or outlet
duct (if ducted)
4. Impeller is obstructed or slow
5. Voltage is low
6. Create openings in heated cavities to reduce
backpressure.
5 Options and Accessories
4033895
Duct Kit, Compact Heater, 8” inlet (no flex Duct)
4027415
8” x 25’ Flex Duct
4032773
Cord Kit, (2) 25’ Lighted Cords & (2) 50’ Lighted
Cords
4030671
9” x 11 3/8 x ¾” Mini-Pleated MERV-11 Filter
4030733
Filter Package, 12 PK; 9” x 11 3/8 x ¾” Mini-
Pleated MERV-11 Filter
4033734
Filter Package, 4 PK; 9” x 11 3/8 x ¾” Mini-
Pleated MERV-11 Filter
4030115
Reed LM 8000 Multi-Function Meter
4027327
Phoenix Remote Thermostat Kit
