292278-UIM-A-0108
HIGH EFFICIENCY
TUBULAR HEAT EXCHANGER SERIES
MODELS: PC9*UP, FC9C*UP, FL9C*UP
(Modulating Upflow with ECM Motor)
60 - 120 MBH INPUT
(17.6 - 35.2 KW) INPUT
INSTALLATION MANUAL
EFFICIENCY
RATING
CERTIFIED
ISO 9001
Certified Quality
Management System
SECTION I: FURNACE DESCRIPTION
This furnace is a modulating furnace. It is designed to maximize the
comfort in the home and to minimize the sound level in the home by
varying (modulating) the gas input and the circulating airflow to closely
match the amount of heating needed at any given time.
SECTION II: SAFETY
This is a safety alert symbol. When you see this symbol on
labels or in manuals, be alert to the potential for personal
injury.
Understand and pay particular attention to the signal words
DANGER
,
WARNING
, or
CAUTION
.
DANGER
indicates an
imminently
hazardous situation, which, if not
avoided,
will result in death or serious injury
.
WARNING
indicates a
potentially
hazardous situation, which, if not
avoided,
could result in death or serious injury
.
CAUTION
indicates a potentially hazardous situation, which, if not
avoided
may result in minor or moderate injury.
It is also used to
alert against unsafe practices and hazards involving only property dam-
age.
Improper installation may create a condition where the operation of
the product could cause personal injury or property damage.
Improper installation, adjustment, alteration, service or mainte-
nance can cause injury or property damage. Refer to this manual
for assistance or for additional information, consult a qualified con-
tractor, installer or service agency.
This product must be installed in strict compliance with the installa-
tion instructions and any applicable local, state, and national codes
including, but not limited to building, electrical, and mechanical
codes.
LIST OF SECTIONS
FURNACE DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
ELECTRICAL POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
COMBUSTION AIR AND VENT SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . 14
CONDENSATE PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
START-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
NORMAL OPERATION AND DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . 26
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
LIST OF FIGURES
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Thermostat Chart – Two Stage AC -
Variable Speed Modulating Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Thermostat Chart – Two Stage AC -
Variable Speed Modulating Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Thermostat Chart – Two Stage AC -
Variable Speed Modulating Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Thermostat Chart – Two Stage HP - Variable Speed
Modulating Furnace with Hot Heat Pump Operation . . . . . . . . . . . . . . . . 12
Thermostat Chart – Two Stage HP - Variable Speed
Modulating Furnace with Hot Heat Pump Operation . . . . . . . . . . . . . . . . 13
Accessory Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Home Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Termination Configuration - 1 Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Termination Configuration - 2 Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Termination Configuration - 2 Pipe Basement . . . . . . . . . . . . . . . . . . . . . 17
Double Horizontal Sealed Combustion Air and Vent Termination . . . . . . 18
Double Vertical Sealed Combustion Air and Vent Termination . . . . . . . . 18
Sealed Combustion Air Intake Connection and Vent Connection . . . . . . . 18
Combustion Airflow Path Through The Furnace Casing . . . . . . . . . . . . . . 18
Outside and Ambient Combustion Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Attic and Crawl Space Combustion Air Termination . . . . . . . . . . . . . . . . . 20
Condensate Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Reading Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Furnace Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
LIST OF TABLES
Unit Clearances to Combustibles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Minimum Duct Sizing For Proper Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Round Duct Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Recommended Filter Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical and Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Maximum Equivalent Pipe Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Equivalent Length of Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Elbow Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Combustion Air Intake and Vent Connection
Size at Furnace (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Estimated Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Unconfined Space Minimum Area in Square Inch . . . . . . . . . . . . . . . . . . 19
Inlet Gas Pressure Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Nominal Manifold Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Cooling Airflow - A/C Capacity in Tons . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Air Flow Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Filter Performance - Pressure Drop Inches W.C. and (kPa) . . . . . . . . . . . 29
Field Installed Accessories - Non-Electrical . . . . . . . . . . . . . . . . . . . . . . . 29
