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Allied Air A97USMV Installation Instructions Manual

Warm air gas furnace
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Upflow/Horizontal Left and Right Air Discharge
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in
manuals, be alert to the potential for personal injury or death.
As with any mechanical equipment, personal injury can
result from contact with sharp sheet metal edges. Be
careful when you handle this equipment.
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must
be performed by a licensed professional installer (or
equivalent), service agency or the gas supplier.
Unit Dimensions ...................................................................................... 2
Parts Arrangement................................................................................... 3
Gas Furnace ............................................................................................ 4
Shipping and Packing List ....................................................................... 4
................................................................................ 4
Use of Furnace as a Construction Heater ............................................... 5
General .................................................................................................... 6
Setting Equipment ................................................................................... 6
Filters ......................................................................................................11
Duct System ...........................................................................................11
Pipe and Fittings Specifications............................................................. 12
Joint Cementing Procedure ................................................................... 13
Venting Practices ................................................................................... 14
Vent Piping Guidelines .......................................................................... 14
Gas Piping ............................................................................................ 28
*P507028-03*
(P) 507028-03
507028-03
INSTALLATION INSTRUCTIONS
A97USMV
Warm Air Gas Furnace
This manual must be left with the homeowner for future reference.
CAUTION
WARNING
A thermostat is not included and must be ordered
separately.
• A Comfort Sync™ thermostat must be used in
communicating applications.
• In non-communicating applications, a traditional
non-communication thermostat may be used.
In all cases, setup is critical to ensure proper system
operation.
Field wiring for both communicating and non-
communicating applications is illustrated in these
instructions.

TABLE OF CONTENTS

.............................................................................................31
Integrated Control .................................................................................. 40
Blower Motor Performance .................................................................... 48
Unit Start Up .......................................................................................... 54
Gas Pressure Measurement.................................................................. 55
High Altitude Information ....................................................................... 56
Proper Combustion................................................................................ 56
Other Unit Adjustments.......................................................................... 59
Heating Sequence of Operation ............................................................ 60
.............................................................................................62
Planned Service .................................................................................... 64
Integrated Control Diagnostic Codes..................................................... 65
Configuring Unit Size Codes ................................................................. 66
Troubleshooting ..................................................................................... 67
Issue 1622
NOTICE
....................................................................
Manufactured By
Allied Air Enterprises LLC
A Lennox International, Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
73
Page 1 of 74

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  • Page 1: Table Of Contents

    Configuring Unit Size Codes ..............66 Vent Piping Guidelines ................14 Troubleshooting ..................67 Gas Piping .................... 28 ..............Repair Parts List Manufactured By Allied Air Enterprises LLC *P507028-03* A Lennox International, Inc. Company 215 Metropolitan Drive (P) 507028-03 West Columbia, SC 29170 507028-03...

  • Page 2: Unit Dimensions

    Unit Dimensions - inches (mm) * NOTE - C/D20 size units that require second stage air volumes over 1800 cfm (850 L/S) must have one of the following: 1. Single side return air with transition, to accommodate 20 x 25 x 1 in. (508 x 635 x 25 mm) air filter. 2.

  • Page 3: Parts Arrangement

    A97USMV Exploded View Figure 1 507028-03 Issue 1622 Page 3 of 74...

  • Page 4: Gas Furnace

    A97USMV Gas Furnace Safety Information The A97USMV Category IV gas furnace is equipped with a variable capacity, varable speed integrated control. Each DANGER A97USMV is shipped ready for installation in the upflow, horizontal left air discharge or horizontal right air discharge DANGER OF EXPLOSION! position.

  • Page 5: Use Of Furnace As A Construction Heater

    The A97USMV furnace may be installed in alcoves, closets, With a parallel flow arrangement, a damper (or other means attics, basements, garages, crawl spaces and utility rooms.

  • Page 6: General

    • Air filters must be replaced upon construction completion. • When the furnace is installed in an attic or other insulated space, keep insulation away from the furnace. • The input rate and temperature rise must be set per the furnace rating plate.

  • Page 7: Setting Equipment

    SETTING EQUIPMENT UNIT MUST BE LEVEL SIDE TO SIDE IN ALL APPLICATIONS FOR PROPER OPERATION. A SLIGHT TILT TOWARD THE DRAIN IS RECOMMENDED FOR PROPER DRAINAGE. TILT THE UNIT SLIGHTLY (MAX. 1/2”) FROM BACK TO FRONT TO AID IN THE DRAINING OF THE HEAT EXCHANGER. Figure 5 507028-03 Issue 1622...
  • Page 8 See Figure 7. Removing the Bottom Panel Figure 6 A97USMV applications which include side return air and a condensate trap installed on the same side of the cabinet Figure 7 (trap can be installed remotely within 5 feet) require either a return air base or field fabricated transition to accommodate an optional IAQ accessory taller than 14.5”.
  • Page 9 NOTE: Units with 1/2 hp blower motor are equipped with Installation Clearances three flexible legs and one rigid leg. The rigid leg is equipped with a shipping bolt and a flat white plastic washer (rather than the rubber mounting grommet used with a flexible mounting leg).
  • Page 10 Horizontal Applications Cooling coils and supply and return air plenums must The A97USMV furnace can be installed in horizontal be supported separately. applications with either right or left hand air discharge. NOTE: When the furnace is installed on a platform in a Refer to Figure 11 for clearances in horizontal applications.

  • Page 11: Filters

    Duct System Use industry approved standards to size and install the supply and return air duct system. This will result in a quiet and low static system that has uniform air distribution. NOTE: Operation of this furnace in heating mode (indoor blower operating at selected heating speed) with an external static pressure which exceeds 0.8 inches w.c.

  • Page 12: Pipe And Fittings Specifications

    Pipe and Fittings Specifications All pipe, fittings, primer and solvent cement must conform CAUTION with American National Standard Institute and the American Society for Testing and Materials (ANSI/ASTM) standards. Solvent cements for plastic pipe are flammable liquids The solvent shall be free flowing and contain no lumps, and should be kept away from all sources of ignition.

  • Page 13: Joint Cementing Procedure

    Outdoor Exhaust Ac- Exhaust Flush 1-1/2” 2” 3” celerator Accelerator Mount Concentric Concentric Concentric VENT PIPE (Dia. X (Dia. X A97USMV DIA. Length) Length) (in.) 71M80 69M29 60L46 1-1/2” X 12” 2” X 12” 51W11 * or 44W93+ +44W92++ +44W92++ 2-1/2...

  • Page 14: Venting Practices

    Figure 15 Contact Allied Air Technical Service for more information concerning sizing of vent systems which include multiple pipe sizes. Use the steps in Figure 17 to correctly size vent pipe diameter.
  • Page 15 2”. This elbow must be added to the elbow count used to determine acceptable vent lengths. Contact Allied Air Technical Service for more information concerning sizing of vent systems which include multiple pipe sizes.
  • Page 16 Maximum Allowable Intake or Exhaust Vent Length (feet) Table 5 Page 16 of 74 Issue 1622 507028-03...
  • Page 17 Maximum Allowable Intake or Exhaust Vent Length (feet) *Size intake and exhaust pipe length separately. Values in table are for intake or exhaust not combined total. Both intake and exhaust must be same pipe size. Table 5 507028-03 Issue 1622 Page 17 of 74...
  • Page 18 TYPICAL EXHAUST PIPE CONNECTIONS AND CONDENSATE TRAP INSTALLATION IN UPFLOW APPLICATIONS Figure 18 TYPICAL EXHAUST PIPE CONNECTIONS AND CONDENSATE TRAP INSTALLATION IN HORIZONTAL AIR APPLICATIONS (RIGHT HAND DISCHARGE SHOWN) Figure 19 Page 18 of 74 Issue 1622 507028-03...
  • Page 19 VENT TERMINATION CLEARANCES FOR DIRECT VENT INSTALLATiONS IN THE USA AND CANADA Figure 20 507028-03 Issue 1622 Page 19 of 74...
  • Page 20 winter design temperatures below 32°F (O°C). If equired General Guidelines for Vent Terminations 1/2” exhaust pipe should be insulated with (13mm) In Direct Vent applications, combustion air is taken from Armaflex or equivalent. In extreme cold climate areas, outdoors and the flue gases are discharged to the outdoors. 3/4”...
  • Page 21 Field Supplied Wall Terminator or (15F74) Wall Ring Termination Kit See venting Table 5 for maximum venting lengths with this arrangement. * Use wall support every 24” (610 mm). Use two wall supports if extension is greater than 24” (610 mm) but less than 48” (1219 mm). NOTE: One wall support must be 6”...
  • Page 22 EXHAUST PIPE TERMINATION SIZE REDUCTION FIELD SUPPLIED WALL TERMINATION with INTAKE ELBOW * 070 and 090 units installed with flush mount termination must use the 1-1/2” accelerator supplied with the kit. Table 7 5. On field supplied terminations for sidewall exit, exhaust piping may extend a maximum of 12 inches (305 mm) for 2”...
  • Page 23 DIRECT VENT CONCENTRIC WAL TERMINATION FLUSH-MOUNT SIDE WALL TERMINATION 71M80, 69M29 OR 60L46 (US) 51W11 44W92 or 44W93 (Canada) Figure 25 Figure 26 Figure 27 507028-03 Issue 1622 Page 23 of 74...
  • Page 24 1. Determine which side condensate piping will exit the DIRECT VENT APPLICATION unit, location of trap, field-provided fittings and length USING EXISTING CHIMNEY of PVC pipe required to reach available drain. 2. Use a 1/2” rachet drive or flat blade screw driver and remove plug (Figure 31) from the cold end header box at the appropriate location on the side of the unit.
  • Page 25 CONDENSATE TRAP LOCATIONS (Unit shown in upflow position with remote trap) Figure 32 A97USMV With Evaporator Coil Using a Separate Drain (Unit shown in horizontal Left hand discharge position Figure 33 Evaporator Coil Using A Separate Drain CAUTION A separate drain line must be run to the drain from the condensate trap.
  • Page 26 Evaporator Coil using a Common Drain IMPORTANT When combining the furnace and evaporator coil drains together, the A/C condensate drain outlet must be vented to relieve pressure in order for the furnace pressure switch to operate properly. Condensate Trap with Optional Overflow Switch Figure 36 Figure 35 Evaporator Coil using a Common Drain...
  • Page 27 TRAP / DRAIN ASSEMBLY USING 1/2” PVC OR 3/4” PVC    °                     °  °    ...

  • Page 28: Gas Piping

    Gas Piping IMPORTANT CAUTION Compounds used on threaded joints of gas piping must be resistant to the actions of liquified petroleum gases. If a flexible gas connector is required or allowed by the authority that has jurisdiction, black iron pipe shall be installed at the gas valve and extend outside the furnace cabinet.
  • Page 29 NOTE: BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET Figure 36 Horizontal Applications Possible Gas Piping Configurations NOTE: BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET Figure 37 507028-03 Issue 1622 Page 29 of 74...
  • Page 30 Removal of the Furnace from Common Vent 2. Inspect the venting system for proper size and horizontal In the event that an existing furnace is removed from a pitch. Determine that there is no blockage, restriction, venting system commonly run with separate gas appliances, leakage, corrosion, or other deficiencies which could the venting system is likely to be too large to properly vent cause an unsafe condition.

  • Page 31: Electrical

    Electrical The unit is equipped with a field makeup box. The makeup ELECTROSTATIC DISCHARGE (ESD) box may be moved to the right side of the furnace to facilitate Precautions and Procedures installation. If the makeup box is moved to the right side, clip the wire ties that bundle the wires together.
  • Page 32 Thermostat Selection 8. One line voltage “HUM” 1/4” spade terminal is provided on the furnace integrated control. Any humidifier or A Comfort Sync™ thermostat must be used in comunicating other 120V accessory rated up to one amp can be applications. Refer to the instructions provided with the connected to this terminal with the neutral leg of the thermostat for installation, set-up and operation.
  • Page 33 Typical A97USMV Field Wiring Diagram for Standard Non-Communicating Thermostat Figure 44 507028-03 Issue 1622 Page 33 of 74...
  • Page 34 Figure 45 Page 34 of 74 Issue 1622 507028-03...
  • Page 35 Figure 46 507028-03 Issue 1622 Page 35 of 74...
  • Page 36 Field Wiring Connections for Non-Communicating Thermostat Applications *”R” required on some units. Table 12A Page 36 of 74 Issue 1622 507028-03...
  • Page 37 Field Wiring for Non-Communicating Applications (continued) * “R” required on some units. Table 12B 507028-03 Issue 1622 Page 37 of 74...
  • Page 38 Field Wiring for Non-Communicating Applications (continued) * Connect W1 to W1 ONLY if using defrost tempering kit 67M41. NOTE: Do NOT make a wire connection between the room thermolstat L terminal and the L terminal of the A97USMV integrated control.
  • Page 39 Typical A97USMV Wiring Diagram Figure 47 507028-03 Issue 1622 Page 39 of 74...

  • Page 40: Integrated Control

    Integrated Control NEUTRAL TERMINALS COMBUSTION AIR INDUCER CONNECTOR IGNITOR CONNECTOR FLAME SENSE DIAGNOSTIC LINE VOLTAGE PUSH BUTTON TERMINALS DIP SWITCHES OUTDOOR AIR INDOOR SENSOR BLOWER TERMINALS 7-SEGMENT CONNECTOR DIAGNOSTIC LED W915 Y1 TO Y2 DISCHARGE AIR SENSOR W951 R TO O TERMINALS W914 R TO DS FACTORY TEST...
  • Page 41 Thermostat Selection 8. One line voltage “HUM” 1/4” spade terminal is provided on the furnace integrated control. Any humidifier or This unit is designed to operate in a variable rate capacity other 120V accessory rated up to one amp can be mode using a two-stage thermostat.
  • Page 42 Thermostat Selection Switch Settings Table 15 These units are equipped with an integrated control. This satisfied) can be adjusted by moving switches 4 and 5 on control manages ignition timing, combustion air inducer the integrated control. The unit is shipped from the factory speed, heating mode fan OFF delays and indoor blower with a blower Off delay of 90 seconds.
  • Page 43 Low Voltage Field Wiring Field Wiring Connections for Non-Communicating Thermostat Applications D IP S w itc h S e ttin g s a n d O n -B o a rd L in k s (fig u re N O T A G ) D IP S w itc h 1 W 9 1 5 W 9 1 4...
  • Page 44 Low Voltage Field Wiring Field Wiring for Non-Communicating Applications (continued) D IP S w itch S ettin g s an d O n -B o ard L in ks (fig u re N O T AG ) D IP S w itch 1 W 915 W 914 W 951...
  • Page 45 Low Voltage Field Wiring Single Stage 2 Stage DIP Switch Settings & On Board Links (Figure 41) DIP Switch Settings & On Board Links (Figure 41) Thermostat Thermostat DIP Switch W915 W914 W951 DIP Switch W915 W914 W951 (Y1 to Y2) (DS to R) (O to R) (Y1 to Y2)
  • Page 46 Switches 8 and 9 - Cooling Mode Blower Speed- Cooling Mode Blower Speed Ramping The unit is shipped from the factory with the DIP switches positioned for high speed (4) indoor blower motor operation during the cooling mode. The table below provides the cooling mode blower speeds that will result from different switch settings.
  • Page 47 Diagnostic LED (Figure ??) Switches 14 through 19 - Heating Mode Blower Speed The seven segment diagnostic LED displays operating These switches are factory set at the OFF position which status, target airflow, error codes and other information. provides 100% of normal speed during HIGH HEAT demand, The table on page 58 lists diagnostic LED codes.

  • Page 48: Blower Motor Performance

    BLOWER DATA A96UHMV070B12S BLOWER PERFORMANCE (less filter) HEATING BLOWER PERFORMANCE BOTTOM RETURN AIR Heating Input Range and Blower Volume - CFM Heating Adjust CFM Selections 100%. Increase (+15%) Heat CFM 1030 1128 Increase (+7.5%) Heat CFM 1048 Default Heat CFM Decrease (-7.5% ) Heat CFM Decrease (-15% ) Heat CFM COOLING BLOWER PERFORMANCE...
  • Page 49 BLOWER DATA A96UHMV070B12S BLOWER PERFORMANCE (less filter) RIGHT SIDE RETURN AIR WITH OPTIONAL RETURN AIR BASE HEATING BLOWER PERFORMANCE Heating Adjust CFM Selections Heating Input Range and Blower Volume - CFM Increase (+15%) Heat CMS 1091 Increase (-7.5%) Heat CFM 1021 Default Heat CFM Decrease (-7.5% ) Heat CFM...
  • Page 50 BLOWER DATA A96UHMV090C12S BLOWER PERFORMANCE (less filter) RIGHT SIDE RETURN AIR HEATING BLOWER PERFORMANCE Heating Adjust CFM Selections Heating Input Range and Blower Volume- CFM 100% Increase (+15%) Heat CFM 1061 1150 1240 Increase (+7.5%) Heat CFM 1010 1094 1178 Default Heat CFM 1037 1116...
  • Page 51 BLOWER DATA A96UHMV090C16S BLOWER PERFORMANCE (less filter) BOTTOM RETURN AIR HEATING BLOWER PERFORMANCE Heating Adjust CFM Selections Heating Input Range and Blower Volume- CFM Increase (+15%) Heat CFM 1101 1234 1367 1500 1633 Increase (+7.5%) Heat CFM 1028 1155 1281 1407 1534 Default Heat CFM...
  • Page 52 BLOWER DATA A96UHMV090C16S BLOWER PERFORMANCE (less filter) RIGHT SIDE RETURN AIR WITH OPTIONAL RETURN AIR BASE HEATING BLOWER PERFORMANCE Heating Adjust CFM Selections Heating input Range and Blower Volume - CFM 100% Increase (+15%) Heat CFM 1084 1213 1341 1469 1597 Increase (+7.5%) Heat CFM 1010...
  • Page 53 BLOWER DATA A96UHMV090C20S BLOWER PERFORMANCE (less filter) RIGHT SIDE RETURN AIR HEATING BLOWER PERFORMANCE Heating Adjust CFM Selections Heating input Range and Blower Volume - CFM 100% Increase (+15%) Heat CFM 1136 1287 1437 1588 Increase (+7.5%) Heat CFM 1059 1205 1350 1496...

  • Page 54: Unit Start Up

    Unit Start Up BEFORE PLACING THE UNIT INTO OPERATION Smell all around the furnace area for gas. Be sure to smell FOR YOUR SAFETY READ BEFORE OPERATING next to the floor because some gas is heavier than air and will settle on the floor. WARNING The gas valve on these units are equipped with a gas control switch.

  • Page 55: Gas Pressure Measurement

    NOTE: To obtain accurate reading, shut off all other gas 9. Replace the access panel. 10. Turn on all electrical power to the unit. appliances connected to meter. 11. Set the thermostat to desired setting. Supply Pressure Measurement NOTE: When unit is initially started, steps 1 through 11 A threaded plug on the inlet side of the gas valve provides may need to be repeated to purge air from gas line.

  • Page 56: High Altitude Information

    Table 25 Manifold and Operating Signal Pressures in inches 0-7500 ft (0-2286 m) NOTE: A natural to LP/propane gas changeover kit (Table 26) is necessary to convert this unit. Refer to the changeover kit installation instructions for the conversion procedure. High Altitude Information Proper Combustion Furnace should operate a minimum of 15 minutes with cor-...
  • Page 57 BLOWER DATA A96UHMV110C20S BLOWER PERFORMANCE (less filter) BOTTOM RETURN AIR HEATING BLOWER PERFORMANCE Heating Adjust CFM Selections Heating input Range and Blower Volume - CFM 100% Increase (+15%) Heat CFM 1049 1237 1424 1612 1800 1988 Increase (+7.5%) Heat CFM 1000 1174 1349...
  • Page 58 BLOWER DATA A96UHMV110C20S BLOWER PERFORMANCE (less filter) RIGHT SIDE RETURN AIR WITH OPTIONAL RETURN AIR BASE HEATING BLOWER PERFORMANCE Heating Adjust CFM Selections Heating input Range and Blower Volume - CFM 100% Increase (+15%) Heat CFM 1068 1243 1419 1594 1770 1945 Increase (+7.5%) Heat CFM...

  • Page 59: Other Unit Adjustments

    Conversion Kit Requirements and Manifold Test Pressures LP/Propane High Altitude Pressure Manifold Pressure at All Altitudes (In. w.g.) Switch Kit Gas Orifice Model Size Input Low Fire High Fire 0 - 10,000 0 - 7,500 7,501 - 10,000 Size (35% rate) (100% rate) (0 - 3048 m) (0 - 2286 m)

  • Page 60: Heating Sequence Of Operation

    Heating Sequence of Operation 6. At the end of the recognition delay and on all subsequent The integrated control initiates a pressure switch calibration calls for heat in the same heating cycle, the intergrated at the initial unit start-up on a call for heat. The ignition control energizes the combustion air inducer at high control will also initiate a calibration any time main power speed.
  • Page 61 5. If second-stage heat is required, the thermostat 2. Once the control receives a signal that the low fire second stage heat contacts close and send a signal pressure switch has closed, the combustion air inducer to the integrated control. The integrated control either begins a 15 second prepurge at the ignition speed.

  • Page 62: Service

    Service 3. Check amp-draw on the blower motor. Motor Nameplate_____________ Actu- al___________ WARNING Winterizing and Condensate Trap Care ELECTRICAL SHOCK, FIRE, 1. Turn off power to the unit. OR EXPLOSION HAZARD. 2. Have a shallow pan ready to empty condensate water. 3.
  • Page 63 18. Remove screws along vestibule sides and bottom which 39. Reconnect 2 pin plug to gas valve. secure vestibule panel and heat exchanger assembly 40. Replace the blower compartment access panel. to cabinet. Remove two screws from blower rail which 41.

  • Page 64: Planned Service

    Planned Service Return air duct - Must be properly attached and provide an air seal to the unit. A service technician should check the following items during an annual inspection. Power to the unit must be shut off for Operating performance - Unit must be observed during the service technician’s safety.

  • Page 65: Integrated Control Diagnostic Codes

    Integrated Control Diagnostic Codes Press the diagnostic push button and hold it to cycle through a menu of options. Every five seconds a new menu item will be displayed. Release the button when the desired mode is displayed. When a solid “P” is displayed, the furnace capacity/ size is programmed. When the solid “E”...

  • Page 66: Configuring Unit Size Codes

    Configuring Unit Size Codes Power-Up - Number displayed represents by integrated control unit size code (furnace model and capacity). If three horizontal bars are displayed followed by continuous E203, furnace control does not recognize unit size code. Configure per the following: Furnace control in IDLE mode No heating, cooling or indoor fan operation)

  • Page 67: Troubleshooting

    Troubleshooting: Heating Sequence of Operation Ignition and Call for Low Fire With Two Stage Thermostat 507028-03 Issue 1622 Page 67 of 74...
  • Page 68 Troubleshooting : Heating Sequence of Operation (continued) Call for High Fire With Two Stage Thermostat 2 Stage Thermostat 1st Call for High Fire? 2nd Stage Recognition Delay (30 Seconds) Combustion Air Inducer ON (100% Rate Speed) High Pressure Switch Increase Combustion Error Code Wait 5 Closes Within...
  • Page 69 Troubleshooting : Heating Sequence of Operation (continued) Call for Heat Satisfied RUN MODE (TWO-STAGE THERMOSTAT) RUN MODE (SINGLE-STAGE THERMOSTAT) FIRST OR SECOND-STAGE CALL FOR HEAT ALL INPUTS MONITORED (LIMIT, PRESSURE, ALL INPUTS MONITORED (LIMIT, PRESSURE, CALL FOR HEAT/COOL, FLAME LEVEL). CALL FOR HEAT/COOL, FLAME LEVEL).
  • Page 70 Troubleshooting: Heating Sequence of Operation IGNITION AND CALL FOR LOW FIRE WITH TWO-STAGE THERMOSTAT Safety Check Verify There Is No Main Burner Flame Indoor blower OFF After Heat OFF Delay (Low Heat Speed) Limit Combustion Air Limit De-Energize Error Code Indoor Blower Switch Inducer On...
  • Page 71 Troubleshooting : Cooling Sequence of Operation CALL FOR COOLING 1st Stage Cooling Request Received Energize 1st Stage Cooling Contactor (Compressor & Fan) Indoor Blower On After 2-second delay Energize Indoor Blower (Per Ramping Profile) 1st Stage 2nd Stage Cooling Request Cooling Still Active? Request?
  • Page 72 Troubleshooting : Continuous Fan Sequence of Operation Continuous Low Speed Indoor Blower Sequence of Operation Call for Continuous Blower Indoor Blower On (Speed Determined by Dip Switch settings) Request Maintain Indoor for Cooling Go to Call for Cooling Blower at set speed Received? Go to Call for Heat -- Two-Stage Thermostat Request...

  • Page 73: Repair Parts List

    REPAIR PARTS LIST The following repair parts are available through Allied Air distributors. When ordering parts, include the complete furnace model number listed on the nameplate. All service must be performed by a licensed professional installer (or equivalent), service agency, or gas supplier.
  • Page 74 REQUIREMENTS for COMMONWEALTH of MASSACHUSETTS Modifications to NFPA-54, Chapter 10 4. INSPECTION. The state or local gas inspector of the Revise NFPA-54 section 10.8.3 to add the following side wall, horizontally vented, gas-fueled equipment requirements: shall not approve the installation unless, upon inspection, the inspector observes carbon monoxide For all side wall, horizontally vented, gas-fueled equipment detectors and signage installed in accordance with the...

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