NOTES:
1.
If the furnace is equipped with NOx screens and is to be
used with LP (propane) gas, the screens must be removed
prior to start-up.
2.
Drip leg in the gas line must be installed.
3.
The furnace controls require correct polarity on the power
supply and a proper ground.
4.
Y & G must be connected to the control board for cooling
operation.
5.
External filters required on all configurations.
6.
Electrical or gas entry is available on both casing sides.
7.
To measure total static pressure add supply duct pressure to
the return duct pressure, add pressure drop across the ‘A’
coil, and add pressure drop across the filter. Ignore negative
signs on the readings.
8.
Inlet gas pressure for natural gas should be 7” and for pro-
pane should be 11” w.c. Nominal manifold gas pressure is
3.5” for natural gas and 10” w.c. for propane at max. input.
9.
For downflow application the vent blower must be rotated 90
left or right as shown.
* Other airflows are available. see Tech guide for all CFM options.
LED INDICATOR
Slow Green Flash - Normal operation in standby mode
Slow Amber Flash - Normal operation with call for cooling
Two Amber Flashes - Normal operation with call for heat
Three Amber Flashes - Normal operation, burner is on at end of
thermostat cycle.
Six Amber Flashes - Normal operation with call for heat pump
heating.
Any Red Flash - Fault condition
Models
Airflow CFM (Bottom Return without Filters)
Minimum Wire
Size awg @ 75'
One-Way
Maximum
Over Current
Protection
0.5" ESP (Nominal)*
D-A
C-A
B-A
A-B
(T,Y,C,L)PLC060A12MP12C
600
815
1050
1340
14 15
(T,Y,C,L)PLC080B12MP12C
580
775
960
1290
14 15
(T,Y,C,L)PLC080C16MP12C
1000
1200
1395
1715
14 15
(T,Y,C,L)PLC100C16MP12C
980
1165
1345
1600
14 15
(T,Y,C,L)PLC100C20MP12C
1140
1330
1515
2110
12 20
(T,Y,C,L)PLC120C20MP12C
1200
1400
1510
1990
12 20
Models
Input
Rate
Total Unit
Amps
Air Temp. Rise
Max Input °F
Air Temp. Rise
Min Input °F
Time For 1 ft
3
Natural Gas
(1030 Btu/Ft
3
) Seconds
(On Max. Rate)
Max
Min
(T,Y,C,L)PLC060A12MP12C
60,000
30,000
7.0
30-60
20-50
62
(T,Y,C,L)PLC080B12MP12C
80,000
40,000
7.5
40-70
20-50
46
(T,Y,C,L)PLC080C16MP12C
80,000
40,000
10.0
35-65
20-50
46
(T,Y,C,L)PLC100C16MP12C
100,000
50,000
10.0
35-65
20-50
37
(T,Y,C,L)PLC100C20MP12C
100,000
50,000
12.0
35-65
20-50
37
(T,Y,C,L)PLC120C20MP12C
120,000
60,000
12.0
45-75
25-55
30
This document does not replace the installation instructions, which must be referred to for
detailed information.
CLEARANCES
* 24" clearance in front and 18" on side recommended for
service access.
All furnaces approved for alcove and attic installation.
DIMENSIONS
FRONT
A
SUPPLY END
RETURN END
LEFT SIDE
RIGHT SIDE
33”
Clips can be flipped
into the up position
for coil cabinet or
plenum attachment
A-COIL
Follow all national, local codes and standards in addition to this document. The installation
must comply with regulations of the serving gas supplier, local building, heating, plumbing,
and other codes. In absence of local codes, the installation must comply with the national
codes and all authorities having jurisdiction.
28.5”
Gas Pipe
Entry
Thermostat
Wiring
14”
1”
1.5”
23”
Electrical
Entry
.5”
.5”
B
24.25”
4” Diameter
Vent Connection
Outlet
24.38”
20”
.5”
B
.5”
Electrical
Entry
Vent
Connection
Outlet
29.5”
(For Cladded door add
appoximately an additional .75”)
Application
Upflow
Downflow
Horizontal
Top
1" 0" 0"
B-Vent
1" 1" 1"
Rear
0" 0" 0"
Side
0" 0" 1"
Front*
0" 0" 0"
Floor
Combustible
Combustible
1
1. For combustible floors only when used with special
sub-base.
Combustible
Closet
Yes
Yes
Yes
Line Contact
No
No
Yes
Cabinet Size
A (in)
B (in)
All 'A' Cabinet Furnaces
14-1/2"
13-3/8"
All 'B' Cabinet Furnaces
17-1/2"
16-3/8"
All 'C' Cabinet Furnaces
21"
19-7/8"
QUICK REFERENCE GUIDE
80% MODULATING ECM MULTI-POSITION
RESIDENTAL GAS FURNACES (33” TALL)
Subject to change without notice. Published in U.S.A.
535679-URG-A-0909
Copyright
©
2009 by Johnson Controls, Inc. All rights reserved.
Supersedes: Nothing
Johnson Controls Unitary Products
5005 York Drive
Norman, OK 73069
*535679*
