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6-551.31
Part 5H70880A (Rev. AA)
July, 1996
INSTALLATION AND SERVICE MANUAL
gas-fired unit heaters
models PAE and BAE
GAS
R
R
APPROVED
All models approved for use in California by the CEC (when
equipped with IPI), in New York by the MEA division, and in
Massachusetts. Unit heater is certified for non-residential
applications.
Contents Pages
Inspection on arrival . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Installation (inclu
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INSTALLATION SPECIAL PRECAUTIONS THE INSTALLATION AND MAINTENANCE INSTRUCTIONS IN THIS 16. Modine unit heaters are designed for use in heating applications MANUAL MUST BE FOLLOWED TO PROVIDE SAFE, EFFICIENT with ambient temperatures between 32° F and 90° F If an AND TROUBLE-FREE OPERATION. IN ADDITION, PARTICULAR application exists where ambient temperatures can be expected to CARE MUST BE EXERCISED REGARDING THE SPECIAL fall outside of this range, contact factory for recommendations. PRECAUTION
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INSTALLATION In the U.S., the installation of these units must comply with the “National Fuel Gas Code,” ANSI Z223.1, latest edition (also known as NFPA 54) ! CAUTION and other applicable local building codes. For all sizes, minimum clearance to combustibles from the In Canada, the installation of these units must comply with local bottom is 12" and from the sides 18"; for PAE sizes 30-100 plumbing or waste water codes and other applicable codes and with the from the top is 1" and from the vent
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INSTALLATION CAUTION ! Table 1 PAE/BAE Venting System Category Gas Unit Heaters must be vented – do not operate unvented. Model Number Gas Controls Category A built-in draft hood (diverter) is provided – additional Single-Stage I external draft hoods (diverters) are not required or PAE 30 Two-Stage II permitted. Single-Stage I Gas-fired heating equipment that has been improperly Two-Stage II PAE/BAE 50-100 Modulating II vented or which experiences a blocked vent condition may PAE/BAE 125-400 All
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INSTALLATION 4. Support piping so that no strains are imposed on unit or Piping controls. 5. Use two wrenches when connecting piping to unit controls. CAUTION ! 6. Provide a sediment trap before each unit and in the line where low spots cannot be avoided. (See Figure 4). Gas pressure to unit heater controls must never exceed 14" W.C. (1/2 psi). 7. Take-off to unit should come from top or side of main to avoid trapping condensate. When leak testing the gas supply piping system, the appliance and
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INSTALLATION Wiring Attachment of Field Installed Ductwork, Blower dels (BAE) Models Only CAUTION ! CAUTION ! Disconnect power supply before making wiring connections to prevent electrical shock and equipment damage. ALL Do not attempt to attach ductwork of any kind to propeller UNITS MUST BE WIRED STRICTLY IN ACCORDANCE PAE models. WITH WIRING DIAGRAM FURNISHED WITH UNIT. ANY WIRING DIFFERENT FROM WIRING DIAGRAM MAY Burned-out heat exchanger as well as shorter equipment life will BE HAZARDOUS T
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INSTALLATION To Install (Figure 5): Installation of Blower Models (BAE UNITS) 1. Remove and discard the motor tie down strap and the Determining Blower Speed shipping block beneath the belt tension adjusting screw (Not The drive assembly and motor on all gas-fired blower unit used on all models.) heaters are factory assembled. The adjustable motor sheave has been pre-set to permit operation of this unit under average Figure 5 conditions of air flow and without any external static pressure. Blowe
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INSTALLATION 5. To increase the speed of the blower, turn outer side of motor Blower Adjustments sheave clockwise. Following electrical connections, check blower rotation to assure 6. Retighten motor sheave set screw, replace belt and retighten blow-through heating. If necessary interchange wiring to reverse motor base. Adjust motor adjusting screw such that there is blower rotation. Start fan motor and check blower sheave RPM 3/4” belt deflection when pressed with 5 pounds of force with a hand-
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OPERATION Figure 7 CAUTION Correct Pilot Flame Pilot Flame Adjustment Start-up and adjustment procedures should be performed by a qualified serviceman. Check the gas inlet pressure at the unit upstream of the combination gas control. The inlet pressure should be 6"-7" W.C. on natural gas or 12"-14" W.C. on propane. If inlet pressure is too high, install an additional pressure regulator upstream of the combination gas control. The pilot flame must be adjusted as described below. Purging of air fr
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OPERATION Lack of primary air will cause soft yellow-tipped flames. Excess where: primary air produces short, well-defined flames with a tendency F1 = input to heater, Btuh. to lift off the burner ports. Proper operation with natural gas F2 = input to heater, cu. ft. per hr. provides a soft blue flame with a well-defined inner core. C = heating value of gas, Btu per cu. ft. To increase primary air, loosen the manifold mounting screws and tap the manifold away from the mixer tubes until yellow
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Table 4 CHECKING INPUT RATE Manifold Pressure & Gas Consumption * Figure 9 Natural Propane BTU/Cu. Ft. 1050 2500 No. of “U” TUBE Model Specific Gravity 0.60 1.53 Orifices ECO (ON UNITS MANOMETER Manifold Pressure In. W.C. 3.5 10.0 SO EQUIPPED. SEE NOTE 5 ON CFH 28.6 12.0 PAGE 16.) Gal/Hr. Propane – .33 PAE 30 Sec/cu. ft. 126 300 1 FAN GUARD Orifice Drill Size 37 52 LIGHTING CFH 47.6 20.0 INSTRUCTION & PAE 50 Gal/Hr. Propane – .55 RATING PLATE BAE 50 Sec/cu. ft. 76 180 1 FAN MOTOR Orifice Drill S
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DIMENSIONS/PERFORMANCE – PAE A C For all sizes, minimum clearance to com-bustibles H F from the bottom is 12 inches and from the sides 18 W X inches; for sizes 30-100 from the top is 1 inch and K J VENT PIPE from the vent con-nector 2 inches; for sizes 125- G AA 300 from the top is 2 inches and from the vent K connector 3 inches; and for sizes 350 and 400 from the top is 3 inches and from the vent connector 6 E B inches. Also, allow at least 12 inches at the rear, or 6 inches beyond the end of t
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DIMENSIONS/PERFORMANCE – BAE C For blower sizes, minimum A F N EE clearance to combustibles from H X P the bottom is 12", from the sides W 4-5/8'' K S J VENT PIPE 18", and from the top and vent G AA O connector is 6". Allow at least 12" at the rear, or 6" beyond the end of the motor (whichever is QxV K greater), to provide ample air for E B RxT combustion and for proper operation of fan. BB Clearance at bottom should BLOWER FILTER RACK ENCLOSURE equal “C” dimension for each M (APPROX.) (OPTIONAL
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PERFORMANCE DATA – NOZZLES 90° VERTICAL A choice of four air discharge nozzles NOZZLE accommodate various heat throw patterns illustrated. Equipped with adjustable louver blades, nozzles are fabricated from galvanized steel and are offered either unpainted or painted to match the finish of the blower unit heaters. Nozzles are flanged H for easy attachment over the air discharge opening H of the blower unit heater. T S S S 40° DOWNWARD NOZZLE 5-WAY NOZZLES T T S H 40° SPLITTER NOZZLE S
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DIMENSIONAL DATA A A 3 /4" 3 /4" B B D D C C 40° 40° Downward Nozzles Splitter Nozzles A A 3 /4" 3 /4" B B D D C C 90° 5-Way Downward Nozzles Nozzle Dimensions (in inches) Model Number Nozzle Dimension Symbol Type BAE-50 BAE-75 BAE-100 BAE-125 BAE-145 BAE-175 BAE-200 BAE-225 BAE-250 BAE-300 BAE-350 BAE-400 A 14-13/16 16-13/16 18-9/16 18-9/16 21-1/16 23-3/16 23-3/16 26-3/16 26-3/16 31-1/8 31-1/8 37-1/2 40° Downward B 16 16 20 20 20 24 24 24 24 24 24 24 Nozzle C 24 22 26 26 25 30 30 30 30 36 36 36
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PERFORMANCE DATA – HOODS Performance Data — 30°, 60° and 90° Downward Deflector Hoods — Propeller Models Mounting Height to 30° Downward Hood For Propeller Units ➀ Bottom of Heater Model PAE 50 PAE 75 PAE 100 PAE 125 PAE 145 PAE 175 PAE 200 PAE 225 PAE 250 PAE 300 PAE 350 PAE 400 X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z 8' 6 14 19 10 24 32 9 22 31 14 30 41 18 38 52 13 28 39 17 36 49 17 36 49 23 48 65 20 42 57 23 48 65 24 50 68 10' – 9 21 30 8 19 27 12 29 39 17 37 5
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PERFORMANCE DATA – HOODS Performance Data — 30°, 60° and 90° Downward Deflector Hoods — Blower Models Mounting Height to 30° Downward Hood For Blower Units ➁ Bottom of Heater Model BAE 50 BAE 75 BAE 100 BAE 125 BAE 145 BAE 175 BAE 200 BAE 225 BAE 250 BAE 300 BAE 350 BAE 400 X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z 8' 11 24 33 16 35 48 16 35 48 21 44 60 23 46 63 21 43 59 25 50 69 26 53 71 29 58 79 30 61 83 36 71 97 36 71 97 10' 9 22 30 15 34 46 15 34 46 20 43 59 21
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PERFORMANCE DATA - BLOWER UNIT HEATERS Models With or Without Blower Enclosure ➀ ➁ ➂ ➃ ➄ 0.4 Static Pressure 0.0 Static Air Pressure 0.1 Static Air Pressure 0.2 Static Air Pressure 0.3 Static Air Pressure Sheave Temp Sheave Sheave Sheave Sheave RPM HP Drive Turns Model Input Rise Airflow RPM HP Drive Turns RPM HP Drive Turns RPM HP Drive Turns RPM HP Drive Turns No. Open No. Output (°F) (cfm) No. Open No. Open No. Open No. Open 910 4 40 938 635 1/4 C8 3.5 705 2 775 1 845 1/3 C1 4.5 1/3 C1 870 4.
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PERFORMANCE DATA - CONTINUED Models With or Without Blower Enclosure ➀ ➁ ➂ ➃ ➄ Data for use with filters only 0.5 Static Air Pressure 0.6 Static Air Pressure Filters Temp Sheave Sheave For blower units with enclosure and filter, add Model Rise Airflow RPM HP Drive Turns RPM HP Drive Turns the following static pressures to the static No. (°F) (cfm) No. Open No. Open pressure determined by the system designer 40 938 – – – – – – – – for total external static pressure. 45 833 940 3.5 – – – – 50 750
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SERVICE INSTRUCTIONS – SAFETY DEVICES Figure 13 Cross-section of Propeller Type Unit BLOCKED VENT ALUMINIZED STEEL SAFETY SWITCH DRAFT DIVERTER DIVERTER RELIEF OPENING VENT PIPE CONNECTION HEAT EXCHANGER DEFLECTOR BLADES FAN & FAN GUARD LIMIT CONTROL MAIN BURNER COMBUSTION AIR INLETS Limit Control (Overheat Switch) the left outer side panel, held in place by screws at the rear of the unit. The limit control, mounted on the left inner side panel (when IMPORTANT NOTE: facing front of unit), will s
