TJERNLUND PAI-3,4,5,6,7 COMMERCIAL COMBUSTION AIR IN-FORCERS 8506003 REV B 0803 Manual

TJERNLUND COMMERCIAL IN-FORCER
The IN-FORCER commercial combustion air intake systems are designed and Listed for use with atmospheric or induced combustion gas and oil heat-
ing equipment. The IN-FORCER functions as the source of combustion air, eliminating the need for louvered openings. Duct up to 100 equivalent feet
through a sidewall or roof from Intake Hood. The IN-FORCER assures intake air is supplied by monitoring the air flow with a Fan Proving Switch. The
main burner will be interrupted if a malfunction occurs. Complies with IMC and NFPA combustion air requirements.
PAI-3 Motor: 115/1/60, 3000 RPM, 95 watts, 1.26 FLA, Thermal Prot.
PAI-5 Motor: 115/1/60, 1725 RPM, 1/4 HP, 5.4 Amps, Thermal Prot.
PAI-7 Motor: 115/208/230/1/60, 1725 RPM, 1 HP, 12.6/6.3/6.2 Amps, Thermal Prot.
Single Appliance Interlock: We recommend the use of the Model UC1 Universal Control when interlocking with a single appliance. The UC1 is suit-
able for 24 or 115 VAC appliance interlocks or "dry contact" actuation and features Pre / Post-Purge options, LED diagnostics and Fan Prover status
checking. The UC1 is standard on Tjernlund's HS-Series Power Venters (Except HSUL -Series) or can be added when using a Draft Inducer. The
UC1 can control both the IN-FORCER and Venter/Inducer if the combined motor load is under 1 H.P. If wiring the PAI-7 motor for 208-230 VAC in
conjunction with the UC1, a 115 VAC coil, DPST motor contactor rated for 1 H.P. is required. If the UC1 control is not used, a 24 or 115 VAC relay
(based on appliance control circuit voltage) suitable to handle the PAI motor load may be used to activate the IN-FORCER motor. IN-FORCER can
be directly wired into 115 VAC appliance control circuits as long as contacts of the circuit can handle the additional load of IN-FORCER motor.
Multiple Appliance Interlocks: Requires use of UC1 Universal Control and MAC1E for two appliances. UC1 and MAC4E are required for up to five
appliances. MAC4Es can be daisy chained together for more than 5 appliances. Each millivolt appliance requires a WHKE millivolt interlock kit. If
wiring the PAI-7 motor for 208-230 VAC in conjunction with the UC1, a 115 VAC coil, DPST motor contactor rated for 1 H.P. is required.
Fan Proving Switch: If using the UC1 Universal Control, 5 VDC board supplied power is switched through the Fan Prover. If not using the UC1, do not
exceed 3 FLA or 1/10 HP through proving switch contacts or an isolation relay will have to be added.
High Limit: Manual reset N/C contacts, open at 160° + 8° F, 14 FLA @120 VAC. The high limit switch will deactivate the IN-FORCER if temperature
adjacent to high limit reaches the set point. Reset button is located on inside of cabinet on electrical box side of IN-FORCER.
INTAKE HOOD DIMENSIONS

COMMERCIAL IN-FORCER PERFORMANCE CURVES

DESCRIPTION

ELECTRICAL SPECIFICATIONS & DIMENSIONS
PAI-4 Motor: 115/1/60, 3300 RPM, 166 watts, 1.51 FLA, Thermal Prot.
PAI-6 Motor: 115/1/60, 1725 RPM, 1/3 HP, 5.8 Amps, Thermal Prot.
IN-FORCER COMBUSTION AIR INTAKE DIMENSIONS
TM
MODELS PAI-3/4/5/6/7 SPECS.

SAMPLE SPECIFICATION

Furnish _____ fan powered combustion air intake system(s).
System shall incorporate fan proving switch safety interlock
and high ambient temperature cut-off in the event of mechani-
cal room fire. Combustion air intake system shall include wall /
roof mountable intake hood. Intake hood should be made of
corrosion proof 5052 aluminum.
IN-FORCER WEIGHT (LBS)
COMPONENT
PAI-3 Combustion Air Intake System*
PAI-4 Combustion Air Intake System
PAI-5 Combustion Air Intake System
PAI-6 Combustion Air Intake System
PAI-7 Combustion Air Intake System
PAI-3 Intake Hood*
PAI-4 Intake Hood
PAI-5 Intake Hood
PAI-6 Intake Hood
PAI-7 Intake Hood
*The PAI-3 Intake System & Hood ship in the same box. Ship
weights are based on UPS oversized rates.
ACTUAL SHIP
WEIGHT WEIGHT
20 48
26 32
60 60
61 61
95 95
12 *
15 27
16 50
16 50
20 70
P/N 8506003 REV B 08/03