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MDA1-75N, MDA1-50N, MHA1-75N, MHA1-100N APPENDIX E REPLACEMENT PARTS LIST - MHA1
Models:
MDA1-100N
MDA1-125N
MDA1-75N
MHA1-125N
MHA1-50N
MHA1-100N
MHA1-75N
MDA1-50N
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Troubleshooting
Specifications
Install
Parts list
Appendix F Wiring Diagram
Filter Location FILTER REPLACEMENT
Maintenance
Wiring
E. Checkout Procedure
B. Adjustment Of Heat Input Rate
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All installations and services must be performed by qualified service personnel.
APPENDIX E: REPLACEMENT PARTS LIST - MHA1
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Contents
MHA1-100N MDA1-100N MHA1-125N MDA1-125N
MODELS MHA1-50N MDA1-50N MHA1-75N MDA1-75N
INDUCED DRAFT HIGHBOY AND COUNTERFLOW/HORIZONTAL
GAS FURNACE
Notice to the Installer
Contents
I. SAFETY
II. INSTALLATION GUIDELINES
VI. INSTALLER’S INSTRUCTIONS TO USER
Material and Workmanship
Notice to the Installer
Packaging
Shipping Damage
I. Safety
A. Codes
II. Installation Guidelines
C. Closet and Alcove Installation
B. Installation Location
D. Standard Clearances
E. Air for Combustion and Ventilation
F. MDA1 Horizontal Installation
Figure 2 MDA1 Installed Horizontal
G. Duct Work and Air Conditioning
H. Filters/ Filter Installation
Figure 3 Optional Thermo Pride Filter Rack
I. Use of Non-ThermoPride Filter Retention Means
Table 2 Minimum Filter Area Required Sq. in
J.Venting
CARBON MONOXIDE POISONING HAZARD
3. Condensing in the Chimney
condensing within the chimney under certain conditions. The following is an explanation on why and what to do if condensing occurs in a chimney or vent
4. Flue/Vent Connector
Figure 4 Vent Connection to Inducer
Figure 5 Inducer Mounting
K. Sidewall Venting
MODEL NUMBER
L. GAS PIPING
Piping from the natural gas meter to the furnace shall be in accordance with requirements of the local utility. Piping from the propane tank to the furnace must follow the recommendations of the gas supplier
Figure 6 Typical Gas Piping
1. INSTALLATION OF NATURAL GAS PIPING
MHA1 SERIES
TABLE 4 Steel Pipe Size for Natural Gas IPS
2.INSTALLATION OF PROPANE GAS PIPING
Table 5 COPPER TUBING SIZE FOR PROPANE GASES
Figure 7 Typical Piping For Two-StageRegulation
2. Field Wiring and Replacing Wiring
M. Electrical
1. Wiring
4.Room Thermostat
Figure 8 Blower and Control Panel
5.Blower Motor Speed Wiring
A.Initial Startup
III.Initial Operation of the Furnace
For Your Safety Read Before Operating
To Turn Off Gas To Appliance
STOP! Read the safety information above
Operating Instructions
B. Adjustment Of Heat Input Rate
Range of
C. Burner Adjustment
D. Setting Supply Air Temperature Rise
E. Checkout Procedure
The LED will also flash once at power-up
IV. Troubleshooting
DIAGNOSTIC FEATURES
B. General Inspection
V. Dealer Maintenance
A.Electrical
C. House Air Blower
Figure 11 Filter Location FILTER REPLACEMENT
D. Return Air Filter
Filter Maintenance Procedure
VI. Installers Instructions to User
APPENDIX A SOURCES FOR REFERENCE STANDARDS
Control System Action
Mode of Operation
Standby At any time the gas
valve is not energized
Main Burner Operation
Mode of Operation
Control System Action
A. Heating System
APPENDIX C TROUBLESHOOTING FLOWCHARTS
Page
Yes No
Page
APPENDIX D PARTS PACKAGE COMPONENTS
APPENDIX E REPLACEMENT PARTS LIST - MHA1
Page
REPLACEMENT PARTS LIST - MDA1
Page
APPENDIX F WIRING DIAGRAM
Page
APPENDIX G MID-EFFICENCYFURNACE SPECIFICATIONS
Model NO
