W415-1080 / B / 08.28.13
3
IOM
1.0 INTRODUCTION
IMPORTANT
:
PLEASE READ THIS MANUAL CAREFULLY AND KEEP IN A SAFE PLACE FOR FUTURE REFERENCE
BY A SERVICE TECHNICIAN.
This high ef
fi
cient gas
fi
red two stage condensing furnace is an up
fl
ow warm air furnace suitable for residential
and light commercial heating applications with inputs from 60,000 to 120,000 Btu/hr.
This high ef
fi
cient furnace series is CSA certi
fi
ed as a Category IV indirect or direct vent central forced air fur-
nace. When installed as a direct vent furnace, all combustion air is supplied to the furnace burners through the air
intake system.
(See Section 7, “Ventilation and Combustion Piping.”)
The furnace is shipped completely assembled except for the condensate drain trap assembly. Please inspect
for damage when the furnace is unpacked.
NOTE: Changes, other than editorial, are denoted by a vertical line in the margin.
15.0
LOW VOLTAGE WIRING
43
15.1 SINGLE
STAGE
THERMOSTAT
43
15.2 TWO
STAGE
THERMOSTAT
43
15.3 THERMOSTAT
LOCATION
43
16.0
OPTIONAL ACCESSORIES (FIELD SUPPLIED/INSTALLED)
44
16.1 ELECTRIC
AIR
CLEANER
44
16.2 POWER
HUMIDIFIER
44
16.3
EMERGENCY HEAT MODE
44
17.0
INITIAL STARTUP PROCEDURES
45
17.1
TO START THE FURNACE
45
17.2
TO SHUT DOWN THE FURNACE
45
17.3
SEQUENCE OF OPERATION
46
17.4 PROGRAMMABLE
THERMOSTAT
(OPTION)
46
18.0 AIR
FLOW
47
18.1
TEMPERATURE RISE CHECK
47
18.2 CALCULATING
AIR
FLOW
48
18.3
ADJUSTING BLOWER SPEEDS ON ECM 2.3 BLOWER MOTORS
48
18.4
DEHUMIDIFICATION - ECM 2.3
49
18.5
SETTING BLOWER “ON” AND “OFF” TIMINGS - ECM 2.3 MODELS ONLY
49
18.6
CONTINUOUS FAN OPERATION
49
19.0 MAINTENANCE
AND
TROUBLESHOOTING
50
19.1 AIR
FILTER
50
19.2 LUBRICATION
50
19.3 TROUBLESHOOTING
FLOWCHART
51
19.4
DIAGNOSTIC CODES FOR STATUS LED
52
19.5
FAULT CODE HISTORY
52
19.6
INTERNAL LIGHTING SYSTEM
52
19.7
UV LAMP REPLACEMENT (IF OPTIONAL UV PURIFICATION KIT INSTALLED)
53
20.0
WIRE DIAGRAM FOR TWO STAGE FURNACE WITH ECM 2.3
54
21.0 WARRANTY
56
22.0
REPLACEMENT PARTS LIST
57
23.0 SERVICE
HISTORY
58
ATTENTION
:
TO REMOVE OUTER STAINLESS STEEL DOOR, FIRMLY GRAB DOOR SIDES AND PULL OFF.
TO REPLACE OUTER STAINLESS STEEL DOOR, ALIGN AND PUSH DOOR ON INTO PLACE.