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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.
Unit Dimensions ..........................................................2
95G1UHEX Gas Furnace ............................................3
Shipping and Packing List ...........................................3
General ........................................................................5
Combustion, Dilution & Ventilation Air .........................6
Installation - Setting Equipment ...................................9
Filters .........................................................................12
Duct System ..............................................................12
Pipe & Fittings Specifications ....................................13
Joint Cementing Procedure .......................................14
Venting Practices .......................................................16
Vent Piping Guidelines ..............................................17
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 HVAC installer (or
equivalent), service agency or the gas supplier.
Manufactured By
Allied Air Enterprises LLC
A Lennox International, Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
507762-01
INSTALLATION INSTRUCTIONS
95G1UHEX
Warm Air Gas Furnace
This manual must be left with the homeowner for future reference.
Table of Contents
WARNING
Save these instructions for future reference
Condensate Piping ....................................................30
Gas Piping .................................................................34
Electrical ....................................................................37
Unit Start-Up ..............................................................40
Gas Pressure Adjustment ..........................................42
Proper Combustion....................................................42
High Altitude Information ...........................................42
for Non-Direct Vent Applications ................................43
Other Unit Adjustments..............................................43
Service.......................................................................45
Repair Parts List ........................................................46
As with any mechanical equipment, personal injury can
result from contact with sharp sheet metal edges. Be
careful when you handle this equipment.
*P507762-01*
Issue 1907
CAUTION
(P) 507762-01
Page 1 of 46
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Summary of Contents for Allied 95G1UHEX Series
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Page 1: Table Of Contents
HVAC installer (or careful when you handle this equipment. equivalent), service agency or the gas supplier. Manufactured By *P507762-01* Allied Air Enterprises LLC A Lennox International, Inc. Company 215 Metropolitan Drive (P) 507762-01 West Columbia, SC 29170... -
Page 2: Unit Dimensions
Unit Dimensions EXHAUST AIR 3-1/4 OUTLET (83) NOTE - 60C size units that require second stage air volumes 1-7/8 (48) over 1800 cfm must have one of the following: Single side return air with transition, to accommodate 20 x 25 x 1 in. (508 x 635 x 25 mm) air filter. SUPPLY AIR Single side return air with optional RAB Return Air OPENING... -
Page 3: 95G1Uhex Gas Furnace
95G1UHEX Gas Furnace DIRECT VENT INSTALLATION NON-DIRECT VENT INSTALLATION EXHAUST OUTLET COMBUSTION EXHAUST The 95G1UHEX Category IV gas furnace is shipped ready AIR INTAKE OUTSIDE OUTLET OF HOUSE for installation in the upflow or horizontal position. The furnace is shipped with the bottom panel in place. The bottom panel must be removed if the unit is to be installed in horizontal or upflow applications with bottom return air. - Page 4 Building Codes prevent chilled air from entering the furnace. If the damper is manually operated, it must be equipped to prevent In the USA, installation of gas furnaces must conform with operation of either the heating or the cooling unit, unless it local building codes.
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Page 5: General
FOLLOW THE ABOVE INSTALLATION INSTRUCTIONS. normally subject to freezing temperatures. FAILURE TO FOLLOW THE ABOVE INSTALLATION INSTRUCTIONS VOIDS MANUFACTURER’S EQUIPMENT LIMITED WARRANTY. ALLIED DISCLAIMS ALL LIABILITY IN CONNECTION WITH INSTALLER’S FAILURE TO FOLLOW THE ABOVE INSTALLATION INSTRUCTIONS. 507762-01 Issue 1907 Page 5 of 46... -
Page 6: Combustion, Dilution & Ventilation Air
needs and requirements for exhaust vents and gas piping. A portion of this information has been reprinted with WARNING permission from the National Fuel Gas Code (ANSI- Z223.1/ NFPA 54). This reprinted material is not the complete and Insufficient combustion air can cause headaches, official position of the ANSI on the referenced subject, nausea, dizziness or asphyxiation. - Page 7 outside the space containing the furnace, the return air ducts, each opening shall have a minimum free area of 1 must be handled by ducts which are sealed to the furnace square inch (645 mm2) per 2,000 Btu (.56 kW) per total casing and which terminate outside the space containing input rating of all equipment in the enclosure.
- Page 8 ROOF TERMINATED Roof Terminated EXHAUST PIPE Exhaust Pipe OUTLET AIR Inlet Air Minimum FURNACE SIDE WALL 12 in. (305mm) Ventilation TERMINATED Furnace above Crawl Louvers EXHAUST PIPE (Crawl Space) Space Floor (ALTERNATE INLET AIR LOCATION) NOTE- Each air duct opening shall have a free area of at least one square inch per 2,000 Btu (645mm per .59kW) per hour of the total input rating of all equipment in the enclosure.
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Page 9: Installation - Setting Equipment
Installation - Setting Equipment WARNING Left Side Right Side Do not connect the return air duct to the back of the furnace. Doing so will adversely affect the operation of the safety control devices, which could result in personal injury or death. Bottom (Floor) WARNING Top / Plenum... - Page 10 UPFLOW APPLICATION UNIT UNIT FRONT FRONT AIR FLOW AIR FLOW 1/2” max. FRONT VIEW SIDE VIEW SIDE VIEW HORIZONTAL APPLICATION UNIT FRONT AIR FLOW 1/2” max. END VIEW FRONT VIEW Unit must be level side-to-side. Unit may be positioned from level to 1/2” toward the front to aid in draining. Figure 12.
- Page 11 Figure 19. A horizontal suspension kit must be provided for both the ends. The straps must not (51W10) may be ordered from Allied Air or use equivalent. interfere with the plenum or exhaust piping installation. Cooling coils and supply and return air plenums must be supported separately.
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Page 12: Filters
If necessary, run the condensate line into a condensate against the data given in the appropriate Allied Air pump to meet drain line slope requirements. The Product Specifications bulletin. Additional information pump must be rated for use with condensing furnaces. -
Page 13: Pipe & Fittings Specifications
Supply Air Plenum Pipe & Fittings Specifications If the furnace is installed without a cooling coil, a removable access panel should be installed in the supply air duct. The All pipe, fittings, primer and solvent cement must conform access panel should be large enough to permit inspection with American National Standard Institute and the American of the heat exchanger. -
Page 14: Joint Cementing Procedure
Low temperature solvent cement is recommended during Joint Cementing Procedure cooler weather. Metal or plastic strapping may be used for vent pipe hangers. Uniformly apply a liberal coat of PVC primer for PVC or use a clean dry cloth for ABS to clean All cementing of joints should be done according to the inside socket surface of fitting and male end of pipe to specifications outlined in ASTM D 2855. - Page 15 STANDARD CONCENTRIC Wall Ring Wall Kit Flush- 1-1/2 in. 2 in. 3 in. Vent Pipe Mount Kit Input Dia. 2 in. 3 in. 2 in. Field Size (in.) Fabricated 51W11 (US) 22G44 (US) 44J40 (US) 71M80 (US) 69M29 (US) 60L46 (US) 15F74 51W12 (CA) 30G28 (CA)
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Page 16: Venting Practices
Tighten both top and bottom bands to 40 in-lbs. See Venting Practices Figure 23. Route piping to outside of structure. Continue with installation following instructions given in piping termination SCHEDULE 40 PVC - 5' section. all other pipe* - 3' REPLACING FURNACE THAT CHIMNEY WAS PART OF A COMMON... -
Page 17: Vent Piping Guidelines
A minimum of 1/4” (6mm) drop for each 12” (305mm) of horizontal run is mandatory for drainage. NOTE: Allied Air has approved the use of DuraVent® and NOTE - Exhaust pipe MUST be glued to furnace exhaust fittings. - Page 18 Use the following steps to correctly size vent pipe diameter. 040, 060, Furnace capacity? 080, 100 btuh Standard or Which termination? Concentric? See Table 3 Which needs most Intake or elbows? Exhaust? How many? Desired pipe size? 2” or 3” What is the altitude? Use Table 5 or 6 to find max pipe length or...
- Page 19 Maximum Allowable Intake or Exhaust Vent Length in Feet Standard Termination at Elevation 0 - 4500 ft 2" Pipe 3" Pipe Number of 90° Model Model Elbows Used Concentric Termination at Elevation 0 - 4500 ft 2" Pipe 3" Pipe Number of 90°...
- Page 20 Maximum Allowable Exhaust Vent Lengths With Furnace Installed in a Closet or Basement Using Ventilated Attic or Crawl Space For Intake Air in Feet Standard Termination at Elevation 0 - 4500 ft 2" Pipe 3" Pipe Number of 90° Model Model Elbows Used NOTE - Additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length...
- Page 21 12” max. 2” 3” EXHAUST 2” 2” *2” 2” 2” EXHAUST *2” Appliance Adaptor Appliance Adaptor 2” INTAKE INTAKE 2” 2” 45° 45° 2” DO NOT transition from smaller to larger pipe in horizontal runs of exhaust pipe. SIDE VIEW * When transitioning up in pipe size, use the shortest length of 2”...
- Page 22 Follow the next two steps when installing the unit in Non- Ventilation Louvers Direct Vent applications where combustion air is taken Inlet Air from indoors and flue gases are discharged outdoors. Roof Terminated (Minimum 12 in. Exhaust Pipe (305mm) above 1.
- Page 23 In both Non-Direct Vent and Direct Vent applications, the At vent termination, care must be taken to maintain vent termination is limited by local building codes. In the protective coatings over building materials (prolonged absence of local codes, refer to the current National Fuel exposure to exhaust condensate can destroy protective Gas Code ANSI Z223-1/NFPA 54 in U.S.A., and current coatings).
- Page 24 ‡ Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor. Allied Air recommends avoiding this location if possible. Figure 33. Page 24 of 46...
- Page 25 Details of Intake and Exhaust Piping Terminations for Direct Vent Installations 3” (76MM) MIN. SIZE PER EXHAUST PIPE Inches (MM) TERMINATION SIZE NOTE: In Direct Vent installations, combustion air is taken REDUCTION TABLE from outdoors and flue gases are discharged to outdoors. UNCONDITIONED ATTIC SPACE 8”...
- Page 26 If intake and exhaust piping must be run up a side wall to position above snow accumulation or other EXHAUST obstructions, piping must be supported. At least one VENT bracket must be used within 6” from the top of the FLASHING 12”...
- Page 27 FIELD FABRICATED WALL TERMINATION NOTE − FIELD−PROVIDED REDUCER MAY BE 2” (51mm) 3” (76mm) REQUIRED TO ADAPT LARGER VENT PIPE SIZE Vent Pipe Vent Pipe TO TERMINATION A− Minimum clearance above grade or average 12” (305 mm) 12” (305 mm) snow accumulation B−...
- Page 28 ‡ Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor. Allied Air recommends avoiding this location if possible. Figure 43.
- Page 29 To Termination Crawl Space and Extended Horizontal Venting KIT 51W18 (USA) KIT 15Z70 (Canada) Allied Air provides kit 51W18 (USA) or kit 15Z70 (Canada) to install 2” or 3” PVC exhaust piping through the floor 1/2” PVC to Code-Approved joists and into the the crawl space. See Figure 46.
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Page 30: Condensate Piping
Figure 47. Condensate Trap and Plug Locations on the condensate trap and line. Heating cable kit is available from Allied Air in various lengths; 6 ft. (1.8m) Install drain trap using appropriate PVC fittings, glue - kit no. 26K68 and 24 ft. (7.3m) - kit no. 26K69. - Page 31 (Unit shown in upflow position with remote trap) Evaporator drain line required FieldProvidedVent (Trap at coil is optional) Min. 1” Above Condensate Drain Connection Field Provided Vent (1” min. 2” max. above condensate connection) 1” Min. 2” Max. Condensate Drain Connection *5’...
- Page 32 (Unit shown in horizontal left-hand discharge position) Field Provided Vent Evaporator (4” min. to 5” max. above Coil condensate drain connection) 4”min 5”max 5’ max. PVC Pipe Only Condensate Drain Connection (Trap at coil is optional) Drain Pan Piping from furnace and evaporator coil must slope down a minimum 1/4” per ft. toward trap Figure 53.
- Page 33 Optional Condensate Drain Connection Adapter 3/4 inch slip X 3/4 inch mpt (not furnished) 90° Street Elbow 3/4 inch PVC (not furnished) Adapter 3/4 inch slip X 3/4 inch mpt (not furnished) Condensate Drain Connection In Unit 1 (25 mm) Min. Vent 2 (50 mm) Max.
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Page 34: Gas Piping
Gas Piping IMPORTANT Gas supply piping should not allow more than 0.5” W.C. Compounds used on threaded joints of gas piping must drop in pressure between gas meter and unit. Supply gas be resistant to the actions of liquified petroleum gases. pipe must not be smaller than unit gas connection. - Page 35 Right Side Piping MANUAL MAIN SHUT-OFF VALVE GROUND JOINT UNION DRIP LEG Gas Valve FIELD PROVIDED AND INSTALLED NOTE - BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET Figure 57. Possible Gas Piping Configurations - Upflow Applications Horizontal Application MANUAL MAIN Right-Side Air Discharge Horizontal Application...
- Page 36 Gas Pipe Capacity - FT³/HR (kL/HR) Nominal Length or Pipe - feet (m) Internal Iron Pipe Diameter Size - - inches inches (3.048) (6.096) (9.144) (12.192) (15.240) (18.288) (21.336) (24.384) (27.432) (30.480) (mm) (mm) .622 (12.7) (17.799) (4.87) (3.34) (2.69) (2.29) (2.03) (1.84)
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Page 37: Electrical
The power supply wiring must meet Class I restrictions. Electrical Protected by either a fuse or circuit breaker, select circuit protection and wire size according to unit nameplate. ELECTROSTATIC DISCHARGE (ESD) NOTE: Unit nameplate states maximum current draw. Precautions and Procedures Maximum Over-Current Protection allowed is 15 AMP. - Page 38 connected to this terminal with the neutral leg of the circuit being connected to one of the provided neutral terminals. If a humidifier rated at greater than one amp is connected to this terminal, it is necessary to use an external relay relay. One 24V “H”...
- Page 39 Figure 61. 507762-01 Issue 1907 Page 39 of 46...
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Page 40: Unit Start-Up
RED LED Flash Code Diagnostic Codes / Status of Furnace No power to control or board fault detected Heartbeat Normal Operation - Idle, Continuous Fan, Cool Continuous Rapid Flash Call For Heat / Burner Operation Reverse Line Voltage Polarity Improper Earth Ground Burner failed to light, or lost flame during heat demand Low Flame Signal - check flame sensor Watchguard - burner failed to light, exceeded maximum number of retries or recycles. -
Page 41: Warning
11. Set the thermostat to desired setting. Wait for the combustion air inducer to stop. Set the thermostat to initiate a heating demand and again NOTE: When unit is initially started, steps 1 through allow the burners to fire for approximately 3 minutes. 11 may need to be repeated to purge air from gas line. -
Page 42: Gas Pressure Adjustment
Gas Pressure Adjustment IMPORTANT For safety, connect a shut-off valve between the Gas Flow (Approximate) manometer and the gas tap to permit shut off of gas Seconds for One Revolution pressure to the manometer. Unit Natural 1 cu ft Dial 2 cu ft Dial Manifold Line... -
Page 43: Testing For Proper Venting And Sufficient Combustion Air For Non-Direct Vent Applications
Follow the lighting instruction to place the appliance Testing for Proper Venting and Sufficient being inspected into operation. Adjust thermostat so Combustion Air for Non-Direct Vent appliance will operate continuously. Applications Use the flame of match or candle to test for spillage of flue gases at the draft hood relief opening after 5 minutes of main burner operation. - Page 44 Electrical Blower Speeds Check all wiring for loose connections. Follow the steps below to change the blower speeds. Check for the correct voltage at the furnace (furnace 1. Turn off electrical power to furnace. operating). Correct voltage is 120VAC + 10%. Remove blower access panel.
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Page 45: Service
At the beginning of each heating season, and to comply 1. Check the operation of the ignition system, inspect with the Allied Air Limited Warranty, your system should be and clean flame sensor. Check microamps before and checked as follows: after. -
Page 46: Repair Parts List
Repair Parts List The following repair parts are available through Allied Air dealers. When ordering parts, include the complete furnace model number listed on the CSA nameplate. All service must be performed by a licensed professional installer (or equivalent), service agency, or gas supplier.
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