Comfort-aire Gtua75-e4a, Gtua90-e5a, Gtua75-e3a, Gtua120-e5a, Gtua105-e5a Owner's Manual

Table of Contents

Model Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3

Parts Numbers

Panels - Miscellaneous. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4

Electrical Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5

Blower Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5

Heat Exchanger-Burner Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6

Gas Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7

Orifice Selection Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8

Drawings/Photographs

Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9

Blower Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10

Burner Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11

Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12

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G T U A 7 5 - E 3 A 1 2 3 4 5 6

(1) GAS

(2) 90% - 2 Stage (3) UPFLOW CONDENSING (4) PLACEHOLDER (5) HEATING INPUT DESIGNATION

Electric Ignition Input BTU/HR 75 = 75,000 90 = 90,000 10 = 105,000 12 = 120,000

(6) VARIATION

H E 5 D 7 0 7 F 3 1 0 8 9 9 9 9 (1) (2) (3) (4) (5) (6) (7) (8) (9) (10)

(1) GAS CODE (6) MOTOR HORSEPOWER (2) LIMIT CONTROL (7) PLANT (3) BLOWER (8) WEEK (4) HEATING ELEMENT (9) YEAR (5) SPECIAL AREA REQUIREMENT (10) PRODUCTION NUMBER

MODEL NUMBER EXPLANATION

SERIAL NUMBER EXPLANATION

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No. Notes

1 Jacket AS-61824-25 AS-61824-27 AS-61824-26 AS-61824-26 AS-61824-28 4 Outlet Air Pipe 68-24021-01 68-24021-01 68-24021-01 68-24021-01 68-24021-01 5 Gasket - Outlet Air Pipe 68-24022-02 68-24022-02 68-24022-02 68-24022-02 68-24022-02 6 Top Plate AS-61872-01 AS-61872-02 AS-61872-02 AS-61872-02 AS-61872-03 7 Locknut - Fresh Air Damper 64-24031-01 64-24031-01 64-24031-01 64-24031-01 64-24031-01 8 Burner Door AS-61866-09 AS-61867-09 AS-61867-09 AS-61867-09 AS-61868-09 9 Blower/Filter Door AS-67890-11 AS-67891-11 AS-67891-11 AS-67891-11 AS-67892-11

10 Filter - Plastic 54-24094-01 54-24094-02 54-24094-02 54-24094-02 54-24094-03

Filter Retainer Rod 45-24095-01 45-24095-01 45-24095-01 45-24095-01 45-24095-01 Filter Rod Support Angle AE-60520-01 AE-60520-01 AE-60520-01 AE-60520-01 AE-60520-01 Filter Support Angle AE-61883-01 AE-61883-01 AE-61883-01 AE-61883-01 AE-61883-01

11 Solid Bottom AE-61874-02 AE-61874-03 AE-61874-03 AE-61874-03 AE-61874-04

Button Plug - 1-5/8 in. opening 45-22980-02 45-22980-02 45-22980-02 45-22980-02 45-22980-02 Button Plug - 2 in. opening 45-22980-08 45-22980-08 45-22980-08 45-22980-08 45-22980-08 Button Plug (2) - 2-3/8 in. opening 45-22980-03 45-22980-03 45-22980-03 45-22980-03 45-22980-03

12 Pressure Switch Assembly See Electrical Group

Silicon Tubing- Pressure Switch AE-61737-10 AE-61737-10 AE-61737-10 AE-61737-10 AE-61737-10 13 Trap / Elbow Assembly 68-100651-01 68-100651-01 68-100651-01 68-100651-01 68-100651-01 14 WaterTrap Mount Bracket AE-61841-01 AE-61841-01 AE-61841-01 AE-61841-01 AE-61841-01 15 Junction Box Cover AE-61476-02 AE-61476-02 AE-61476-02 AE-61476-02 AE-61476-02 16 Door Switch (Push Button) See Electrical Group 17 Junction Box AE-61475-02 AE-61475-02 AE-61475-02 AE-61475-02 AE-61475-02

Grommet (5/8 in. Tube) 56-22521-03 56-22521-03 56-22521-03 56-22521-03 56-22521-03

Grommet (1/2 in. I.D.) 56-24008-01 56-24008-01 56-24008-01 56-24008-01 56-24008-01

Grommet (1/4 in. I.D.) 56-24008-02 56-24008-02 56-24008-02 56-24008-02 56-24008-02

Grommet (1-5/8 in. opening) - Before F3906 56-22114-01 56-22114-01 56-22114-01 56-22114-01 56-22114-01

Grommet (2 in. opening) - After F3906 56-22114-06 56-22114-06 56-22114-06 56-22114-06 56-22114-06 28 Heat Exchanger See Heat Exchanger Group 29 Limit - Main Limit (Heat Exchanger Panel) See Electrical Group

Limit - Manual Reset (Burner Compartment) See Electrical Group 30 Connector/Transition 68-24047-07 68-24047-08 68-24047-08 68-24047-08 68-24047-09 31 Induced Draft Blower w/Gasket See Electrical Group

Tubing - Includes TwoHose Clamps (3) 79-25353-82 79-25353-82 79-25353-82 79-25353-82 79-25353-82

Elbow (Induced Draft Blower - 1/2 in. barbed) 68-24013-01 68-24013-01 68-24013-01 68-24013-01 68-24013-01

No. Notes

Complete Parts Bag AS-100717-01

2 O-Ring - Fresh Air Damper 68-24032-01 3 Adapter - Fresh Air Damper and Locknut 68-24114-01

1/2 in. Tee 68-21980-02

1/2 in. PVC Pipe - 4 in. 68-22024-04

Plug - Nylon - 7/8 in. 45-22926-01

Plug - Nylon 1-1/8 in. 45-22926-02

PVC Vane 68-23473-01

PVC Wind Vane - 2-1/2 in. 68-24049-01

Hose Clamp 64-22043-01

Hose Clamp (2) 64-22043-02

MODEL HEATING INPUT VARIATIONS

PANELS, SHEET METAL, MISCELLANEOUS

Tubing Drain Trap(Induced Draft Blower - Includes two Hose Clamps)

MODEL HEATING INPUT VARIATIONS

PARTS BAG

GTUA

-E3A

791000 791001 791001 791001 791002

GTUA

ALL ALL

GTUA

-E4A

GTUA

-E5A

GTUA

105

-E5A

GTUA

120

-E5A

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