TABLE OF CONTENTS
General ...................................................... 4
Unit Dimensions .................................. 4
Shipping Weights ................................ 4
Furnace Specification ........................ 4
Air Flow Data ..................................... 4
Owner's information ................................ 5
installation Requirements ...................... 6
Location .............................................. 8
Clearance ........................................... 8
Circulating Air Supply .......................... 10
Return Air Provisions ............................ 10
Air Distribution Systems ...................... 11
Duct Connector Selection .................... 11
Duct installation .................................... 12
Venting and Combustion
Air Requirements .......................... 14
Venting Requirements .......................... 14
Vent Table ........................................ 15
Vent Pipe Material ............................ 16
Vent Pipe Length and Diameter ....... 16
Vent Pipe installation ........................ 16
Pipe Routing & Support .................... 16
Location of Outdoor Termination ..... 18
Horizontal Venting ............................ 18
Vertical Venting ................................ 19
Vent Freezing Protection ................. 19
Concentric Vent Termination ........... 20
Drainage of Condensate
From Furnace ................................ 20
Gas Supply and Piping ......................... 21
Leak Check ...................................... 22
High Altitude Derate ......................... 22
Pressure Switch ............................... 22
Conversion ............................................. 22
Lighting and Adjustment
of the Appliance ............................ 24
Electrical Wiring ..................................... 24
Line Voltage Wiring .......................... 25
Low Voltage Wiring .......................... 26
Ventilation ............................................... 26
Start-up and Adjustment ..................... 26
Start-Up Procedure ......................... 26
Shut Down Procedure ..................... 27
Verifying and Adjusting Firing Rate. 27
Temperature Rise ............................ 27
Verifying and Adjusting
Verifying Burner Operation .............. 28
Verifying Operation of the
Supply Air Limit Switch ................. 28
Description of Components ................ 29
Furnace Accessories ............................. 29
Maintenance ........................................... 29
Combustion Air and Vent System .... 29
Air Filter(s) ....................................... 29
Lubrication ........................................ 30
Condensate Drain Assembly ........... 30
Blower Compartment ....................... 30
Heat Exchanger and Burner
Maintenance .................................. 30
System Operation Information ............. 30
Sequence of Operation .................... 30
Furnace Fails to Operate ................. 31
Component Location ............................ 32
Wiring Diagram ....................................... 33
Installation/Performance
Checklist ......................................... 35
Application
M-Manufactured Home
Furnace Series
Comfort Model
RL - Condensing Downflow
M3RL-060A-A W
L
LReturn Air Configuration
Blank- Front
T - Top
Door Color
W - White
G - Gray
Cabinet Dimensions
A - 56"x 19-3/4" x 23-3/4"
B - w/Coil Cavity,
76" x 19-3/4" x 23-3/4"
Heating Capacity
input, BTUH (000')
Electrical Code
A - 1PH, 60 Hz, 120 VAC
Table 1. Model Identification
3