Thermo Pride Gas/Propane Furnace Induced Draft Highboy/Counterflow/Horizontal MHA1 - Manual (Page 2)

Contents
SECTION PAGE
Notice to the Installer ..............................................................................................1
I. SAFETY ..............................................................................................................2
II. INSTALLATION GUIDELINES .............................................................................3
A. Codes .........................................................................................................3
B. Installation Location ..................................................................................4
C. Closet and Alcove Installation ..................................................................4
D. Standard Clearances....................................................................................5
E. Air for Combustion and Ventilation ...............................................................6
F. MDA1 Horizontal Installation ........................................................................7
G. Duct Work and Air Conditioning ...................................................................9
H. Filter/Filter Installation ..................................................................................9
I. Use of Non Thermo Pride Filter Retention Means........................................10
J. Venting .........................................................................................................12
1. Vertical Venting ..................................................................................12
2. Replacing an Existing Furnace from a Common................................13
3. Condensing in Chimney .....................................................................14
4. Vent Flue/Vent Connector..................................................................16
K. Sidewall Venting ...........................................................................................19
1. Horizontal Size and Lengths for Horizontal Vents..............................20
L. Gas/Gas Piping ............................................................................................21
1. Installation of Natural Gas Piping.......................................................23
2. Installation of Propane Gas Piping.....................................................24
M. Electrical.......................................................................................................26
1. Wiring.................................................................................................26
2. Field Wiring and Replacing Wiring.....................................................26
3. Electronic Air Cleaner and Humidifier Connections ...........................27
4. Room Thermostat ..............................................................................27
5. Blower Motor Speed Wiring ...............................................................28
III. INITIAL OPERATION OF THE FURNACE .......................................................29
A. Initial Startup ................................................................................................29
B. Adjustment of Heat Input Rate .....................................................................32
C. Burner Adjustment .......................................................................................34
D. Setting Supply Air Temperature Rise ...........................................................35
E. Checkout Procedure.....................................................................................36
IV. TROUBLESHOOTING......................................................................................37
V. DEALER MAINTENANCE .................................................................................38
A. Electrical.......................................................................................................38
B. General Inspection .......................................................................................38
C. House Air Blower..........................................................................................39
D. Return Air Filter ............................................................................................40