TJERNLUND COMMERCIAL IN-FORCER DESCRIPTION TM MODELS PAI-3/4/5/6/7 SPECS. The IN-FORCER commercial combustion air intake systems are designed and Listed for use with atmospheric or induced combustion gas and oil heating 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. ELECTRICAL SPECIFICATIONS & DIMENSIONS PAI-3 Motor: 115/1/60, 3000 RPM, 95 watts, 1.26 FLA, Thermal Prot. PAI-4 Motor: 115/1/60, 3300 RPM, 166 watts, 1.51 FLA, Thermal Prot. PAI-5 Motor: 115/1/60, 1725 RPM, 1/4 HP, 5.4 Amps, Thermal Prot. PAI-6 Motor: 115/1/60, 1725 RPM, 1/3 HP, 5.8 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 suitable 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 IN-FORCER COMBUSTION AIR INTAKE DIMENSIONS COMMERCIAL IN-FORCER PERFORMANCE CURVES 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 mechanical 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) ACTUAL SHIP COMPONENT WEIGHT WEIGHT PAI-3 Combustion Air Intake System* 20 48 PAI-4 Combustion Air Intake System 26 32 PAI-5 Combustion Air Intake System 60 60 PAI-6 Combustion Air Intake System 61 61 PAI-7 Combustion Air Intake System 95 95 PAI-3 Intake Hood* 12 * PAI-4 Intake Hood 15 27 PAI-5 Intake Hood 16 50 PAI-6 Intake Hood 16 50 PAI-7 Intake Hood 20 70 *The PAI-3 Intake System & Hood ship in the same box. Ship weights are based on UPS oversized rates. P/N 8506003 REV B 08/03 IN-FORCER APPLICATION AND SELECTION TABLE Verify that the total BTU/hr input of the heating appliance(s) falls within the range specified below. Check maximum duct length and appropriate duct diameter with the IN-FORCER Selection Table below.E IN-FORCER SELECTION TABLE MAX. DUCT LENGTH IN EQUIV. FEET indicates how much duct may be used at the given diameter based on the four types of heating equipment. All duct before and after the IN-FORCER must be added. To calculate equivalent duct length, add the straight duct plus 10' for every 900 elbow and 5' for each 450 elbow. Values in the chart assume rigid metal duct. Consult flex duct manufacturer for derating percentage if using flex duct. The resistance for any combination of ducts and diffusers cannot exceed the maximum equivalent duct length shown in selection table. If interlocking IN-FORCER with more than one appliance of the same type, add the BTU/HR. input of each appliance to determine IN-FORCER model and maximum equivalent duct length and diameter. If interlocking IN-FORCER with different types of equipment consult Tjernlund Technical Customer Service @ 1-800-255-4208 for further information. Tjernlund Products, Inc. · 1601 9th St. · White Bear Lk, MN 55110 · www.tjernlund.com · (651) 426-2993 · (800) 255-4208 · FAX (651) 426-9547 ...