Comfort-aire Gmuh75e-4a, Gmuh75e-3a, Gmuh50e-3a, Gmuh150e-5a, Gmuh125e-5a Owner's Manual

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Table of Contents

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

Parts Numbers

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

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

Blower Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6

Heat Exchanger-Burner Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7

Gas Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8

Orifice Selection Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9

Drawings/Photographs

Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10

Blower Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11

Burner Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12

Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13

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G M U H - 5 0 E 3 A 1 2 3 4 5 6 7

(1) GAS

(2) 80% EFFICIENCY (3) UPFLOW/HORIZONTAL NON-CONDENSING (4) PLACEHOLDER (5) HEATING INPUT DESIGNATION

50 = 50,000 BTU/HR 75 - 75,000 BTU/HR E = Electric 100 = 100,000 BTU/HR N = NOX 125 = 125,000 BTU/HR 150 = 150,000 BTU/HR

(6) DRIVE NOMINAL COOLING/REVISION LEVEL 3 = 3 Ton 4 = 4 Ton 5 = 5 Ton

(7) REVISION LEVEL

G K 5 D 7 0 7 F 3 1 0 6 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 Plug Button (2) 45-22980-01 45-22980-01 45-22980-01 45-22980-01

Sight Glass 68-21893-03 68-21893-03 68-21893-03 68-21893-03 2 Burner Compartment Door AE-101096-08 AE-101097-08 AE-101097-08 AE-101097-08 3 Blower/Filter Door AS-67893-10 AS-67894-10 AS-67894-10 AS-67894-10

Thumbscrew and Insert Kit 64-24081-81 64-24081-81 64-24081-81 64-24081-81 4 Door Switch - Push Button 42-22692-01 42-22692-01 42-22692-01 42-22692-01 5 Junction Box AE-61475-02 AE-61475-02 AE-61475-02 AE-61475-02 6 Junction Box Cover AE-61476-02 AE-61476-02 AE-61476-02 AE-61476-02 7 Induced Draft Blower See Electrical Group 8 Blower Assembly See Blower Group 9 Jacket AS-61690-17 AS-61690-18 AS-61690-18 AS-61690-18

10 Heat Exchanger Bracket See Heat Exchanger Group 11 Heat Exchanger See Heat Exchanger Group 12 Top Plate AE-101508-01 AE-101508-02 AE-101508-02 AE-101508-02 13 Limit - Main Limit (Heat Exchanger Panel) See Electrical Group 14 Silicone Rubber Tubing (Pressure Switch) AE-61737-27 AE-61737-27 AE-61737-27 AE-61737-27 15 Pressure Switch SeeElectrical Group 24 Control Mounting Plate AE-67877-01 AE-67877-01 AE-67877-01 AE-67877-01 26 Burner Cover Plate See Heat Exchanger Group

Rear Baffle AE-61666-01 AE-61607-01 AE-61607-01 AE-61607-01

Side Baffle (2) AE-61606-01 AE-61606-01 AE-61606-01 AE-100548-01

Touch-up Paint - Platinum (Aerosol) 523012 523012 523012 523012

Touch-up Paint - Platinum (Paint Pens) 523013 523013 523013 523013

Touch-up Paint - Gray (Aerosol) 523014 523014 523014 523014

Touch-up Paint - Gray (Paint Pens) 523015 523015 523015 523015

No. Notes

1 Plug Button (2) 45-22980-01 45-22980-01 45-22980-01

Sight Glass 68-21893-03 68-21893-03 68-21893-03 2 Burner Compartment Door AE-101098-08 AE-101099-08 AE-101099-08 3 Blower/Filter Door AS-67895-10 AS-67896-10 AS-67896-10

Thumbscrew and Insert Kit 64-24081-81 64-24081-81 64-24081-81 4 Door Switch - Push Button 42-22692-01 42-22692-01 42-22692-01 5 Junction Box AE-61475-02 AE-61475-02 AE-61475-02 6 Junction Box Cover AE-61476-02 AE-61476-02 AE-61476-02 7 Induced Draft Blower See Electrical Group 8 Blower Assembly See Blower Group 9 Jacket AS-61690-20 AS-61690-26 AS-61690-26

10 Heat Exchanger Bracket See Heat Exchanger Group 11 Heat Exchanger See Heat Exchanger Group 12 Top Plate AE-101508-03 AE-101508-04 AE-101508-04 13 Limit - Main Limit (Heat Exchanger Panel) See Electrical Group 14 Silicone Rubber Tubing (Pressure Switch) AE-61737-03 AE-61737-23 AE-61737-23 15 Pressure Switch SeeElectrical Group 24 Control Mounting Plate AE-67877-01 AE-67877-01 AE-67877-01 26 Burner Cover Plate See Heat Exchanger Group

Rear Baffle AE-61667-01 AE-61670-01 AE-61669-01

Side Baffle (2) AE-61668-01 AE-61665-01 N/A

Touch-up Paint - Platinum (Aerosol) 523012 523012 523012

Touch-up Paint - Platinum (Paint Pens) 523013 523013 523013

Touch-up Paint - Gray (Aerosol) 523014 523014 523014

Touch-up Paint - Gray (Paint Pens) 523015 523015 523015

MODEL HEATING INPUT VARIATIONS

PANELS, SHEET METAL,MISCELLANEOUS

MODEL HEATING INPUT VARIATIONS

PANELS, SHEET METAL,MISCELLANEOUS

GMUH

50E

GMUH

100E

GMUH

75E

GMUH

125E

GMUH

75E

GMUH

150E

GMUH

100E

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