Mars Comfort-Aire Century SE Series User manual

517.787.2100 • www.marsdelivers.com
Multi-Position Air Handler
AMC**S1A
ECM
Instruction Manual
SE Series
INSTALLER’S GUIDE
CONDENSING UNITS
High Efficiency Air Handlers
2-5Tons
R410a
Thank you very much for purchasing our product.
Before using your unit, please read this manual carefully and keep it for future reference.
The figure shown in this manual is for reference only and may be slightly different from the actual product.

AMC**S1A - Instruction Manual Multi-Position Air Handler-ECM
RECOGNIZE THIS SYMBOL AS AN INDICATION OF IMPORTANT SAFETY
INFORMATION
WARNING
These instructions are intended as an aid to qualified licensed service personnel for proper installation, adjustment
and operation of this unit. Read these instructions thoroughly before attempting installation or operation. Failure to
follow these instructions may result in improper installation, adjustment, service or maintenance possibly resulting in
fire, electrical shock, property damage, personal injury or death.
Air Handler Features
Multi-speed blower motor.
TXV easily installed.
Multi-position installation - upflow or horizontal right standard; field convertible to horizontal left
or downflow.
Multiple electrical entry locations.
Field-installed electric heater kits 5, 7.5, 10, 15, 20 kW available as an accessory.
Dual front panel design for ease of maintenance.
Blower and coil easy slide out for ease of maintenance.
Fully-insulated cabinet design.
Horizontal and vertical condensate drain pans standard.
Condensate drain pan is polymer with UVC inhibitor.
Primary and secondary condensate drain fittings.
Factory-sealed cabinet certified to achieve 2% or less air leakage rate at 1.0 inch water
column.
Integrated filter rack with tool-less door access.
AHRI and ETL listed.
Proposition 65: This appliance contains fiberglass insulation. Respirable particles of fiberglass are known to the state
of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.”
WARNING

Multi-Position Air Handler-ECM AMC**S1A - Instruction Manual
CONTENTS
1SAFETY 01
05
05
05
07
Vertical Upflow
Vertical Downflow
Horizontal
Installation In An Unconditioned Space
3.1
3.2
3.3
3.4
3APPLICATIONS
07
07
07
08
Power Wiring
Control Wiring
Grounding
Electrical Data
Heat Kit Data
4.1
4.2
4.3
4.4
4.5
4ELECTRICAL WIRING
11
09
08
5 AIRFLOW PERFORMANCE
6 DUCTWORK
77 REFRIGERANT CONNECTIONS
12
8AIR FILTER (not factory-installed)
13
9FILTER INSTALLATION DIMENSIONS
2GENERAL
04
Unit Dimensions
2.1
12
Condensate Drain Tubing
7.1
10 WIRING DIAGRAM
11 PISTON/TXV INSTALLATION
14
17
20
For 24/36/60 Model
For 61 Model
10.1
10.1

AMC**S1A - Instruction Manual Multi-Position Air Handler-ECM
1
01
This document is customer property and should remain
with this unit.
These instructions do not cover all the different variations
systems nor does it provide for every possible
contingency to be met in connection with installation. All
phases of this installation must comply with national state
and local codes. If additional information is required,
please contact your local distributor.
1 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.
This is an attention alert symbol. When you
see this symbol on labels or in manuals, be
alert to the potential for personal injury.
WARNING
The unit must be permanently grounded. Failure
to do so can result in electrical shock causing
personal injury or death.
WARNING
WARNING
If removal of the blower assembly is required,
all disconnect switches supplying power to the
equipment must be de-energized and turned off
(if not in sight of unit ) so the field power wires
can be safely removed from the blower
assembly. Failure to do so can cause electrical
shock resulting in personal injury or death.
WARNING
WARNING
WARNING
PROPOSITION 65: This appliance contains
fiberglass insulation. Respirable particles of
fiberglass are known to State of California to
cause cancer.
All manufacturer products meet current federal
OSHA Guidelines for safety. California
Proposition 65 warnings are required for certain
products, which are not covered by the OSHA
standards.
California’s Proposition 65 requires warnings for
products sold in California that contain or
produce any of over 600 listed chemicals known
to the State of California to cause cancer or birth
defects such as fiberglass insulation, lead in
brass, and combustion products from natural
vapor.
All “new equipment” shipped for sale in
California will have labels stating that the
product contains and/or produces Proposition 65
chemicals. Although we have not changed our
processes, having the same label on all our
products facilitates manufacturing and shipping.
We cannot always know “when, or if” products
will be sold in the California market.
You may receive inquiries from customers about
chemicals found in, or produced by, some of our
heating and air-conditioning equipment, or found
in natural vapor used with some of our products.
Listed below are those chemicals and
substances commonly associated with similar
equipment in our industry and other
manufacturers.
Glass Wool (Fiberglass) Insulation
Carbon Monoxide (CO)
Formaldehyde
Benzene
More details are available at the websites for
OSHA (Occupational Safety and Health
Administration), at www.osha.gov and the State
of California’s OEHHA (Office of Environmental
Health Hazard Assessment), at www.oehha.org.
Consumer education is important since the
chemicals and substances on the list are found
in our daily lives. Most consumers are aware that
products present safety and health risks, when
improperly used, handled and maintained.
Because of possible damage to equipment or
personal injury, installation, service, and
maintenance should be performed by a trained,
qualified service personnel. Consumer service
is recommended only for filter cleaning/
replacement. Never operate the unit with the
access panels removed.
These instructions are intended as an aid to
qualified, licensed service personnel for proper
installation, adjustment and operation of this unit.
Read these instructions thoroughly before
attempting installation or operation. Failure to
follow these instructions may result in improper
installation, adjustment, service or maintenance
possibly resulting in fire, electrical shock, property
damage, personal injury or death.
Disconnect all power to unit before installing or
servicing. More than one disconnect switch may
be required to de-energize the equipment.
Hazardous voltage can cause severe personal
injury or death.

Multi-Position Air Handler-ECM AMC**S1A - Instruction Manual
2
02
CAUTION
Fig.1-1 CHECKING MOTOR STATUS
WARNING
The first 6 inches of supply air plenum and
ductwork must be constructed of sheet metal as
required by NFPA 90B. The supply air plenum or
duct must have a solid sheet metal bottom
directly under the unit with no openings,
registers or flexible air ducts located in it. If
flexible supply air ducts are used, they may be
located only in the vertical walls of rectangular
plenum, a minimum of 6 inches from the solid
bottom. Metal plenum of duct may be connected
to the combustible floor base, if not, it must be
connected to the unit supply duct exposed to the
supply air opening from the downflow unit.
Exposing combustible (non-metal) material to
the supply opening of a downflow unit can cause
a fire resulting in property damage, personal
injury or death.
Exception warning to downflow:
Installations on concrete floor slab with supply
air plenum and ductwork completely encased
must be not less than 2 inches of concrete (See
NFPA 90A).
≥40" ≥40"
AIRFLOW
Fig.2-1 CLEARANCES IN THE HORIZONTAL POSITION
≥ 25"
≥0
≥0
≥0
Front of unit
Fig.2-2 CLEARANCES IN THE VERTICAL POSITION
If the supporting structural members are not
strong enough to take the unit’s weight, the unit
could fall out of place and cause serious injury.
If a return-air duct is not installed, carefully select
the place and method of product installation so
that air flow into the product will not be blocked.
WARNING
Make sure the blower
motor support is tight
(3-motor mount
bolts) , then check to
see if wheel is
secured to motor shaft
before operating unit.
2 GENERAL
The unit can be positioned for bottom return air in the
upflow position, left and right return in the horizontal
position, top return in downflow position.
This Air Handler provides the flexibility for installation in
any upflow or downflow horizontal application. The
direct drive motors provide a selection of air volume.
Top and side power and control wiring, accessible
screw terminals for control wiring all combine to make
the installation easy, and minimize installation cost.
See Fig.2-5.
Do not install unit in an area where flammable materials
are present due to the risk of an explosion resulting in
serious injury or death.
The unit should be installed in a level position to ensure
proper condensation drainage. Up to an additional ¼"
rise over the width or depth of the unit is allowed to
create additional sloping towards the drain. Unit must be
positioned between level and ¼" rise, sloping toward the
drain connections.
Install the indoor unit, power supply wiring and
connecting wires at least 3.5 ft. away from televisions or
radios in order to prevent image interference or noise.
See Fig.2-1 and Fig.2-2.

AMC**S1A - Instruction Manual Multi-Position Air Handler-ECM
3
03
When the unit is installed in a hot and humid place, If the humidity inside the installation space might exceed 86°F and RH 80%,
it is recommended to insulate the cabinet exterior.
Use glass wool or polyethylene foam as insulation so that the thickness is more than 2 in. and fits inside the installation space
opening.
Respectively, condensation may form on the surface of the insulation.
Be sure to use insulation that is designed for use with HVAC Systems.
Condensation may form on the product during cool operation. It is also recommended to use the second drain pan and secure
the unit firmly to prevent it from falling. See Fig.2-3 and Fig.2-4 .
Second drain pan Drain piping
Fig.2-3 INSTALLED VERTICALLY
Second drain pan
Drain piping
Fig.2-4 INSTALLED HORIZONTALLY

Multi-Position Air Handler-ECM AMC**S1A - Instruction Manual
4
04
2.1 Unit Dimensions
NOTE: 25” CLEARANCE IS REQUIRED IN THE FRONT
OF THE UNIT FOR FILTER AND COIL MAINTENANCE.
UPFLOW UNIT SHOWN;
UNIT MAY BE INSTALLED UPFLOW, DOWNFLOW,
HORIZONTAL RIGHT OR LEFT AIR SUPPLY.
SUPPLY AIR
FLANGES ARE PROVIDED
FOR FIELD INSTALLATION
ELECTRICAL CONNECTIONS
MAY EXIT TOP OR EITHER SIDE
HIGH VOLTAGE CONNECTION 7/8”,
1-3/8”, 1-3/4” DIA KNOCK OUTS
LOW VOLTAGE CONNECTION
BREAKER SWITCH
(FOR ELECTRIC HEATER ONLY)
VAPOR LINE CONNECTION COPPER (SWEAT)
LIQUID LINE CONNECTION COPPER (SWEAT)
AUXILIARY DRAIN CONNECTION 3/4"
FEMALE PIPE THREAD (NPT)
AUXILIARY DRAIN CONNECTION 3/4"
FEMALE PIPE THREAD (NPT)
PRIMARY DRAIN CONNCETION 3/4"
FEMALE PIPE THREAD (NPT)
A
W
H
D
10 5
16
Table 2-1
24
36
60
61
41-3/8"[1050]
46-1/2"[1180]
54-1/2"[1385]
54-1/2"[1385]
18-1/8"[460]
19-5/8"[500]
22"[560]
22"[560]
20-1/2"[520]
21-5/8"[550]
24"[610]
24"[610]
16"[406]
18"[456]
19-1/2"[496]
19-1/2"[496]
99/[45]
121/[55]
152/[69]
159/[72]
UNIT HEIGHT
"H" IN. [mm]
UNIT WIDTH
"W" IN. [mm]
UNIT LENGHT
"D" IN. [mm] SUPPLY DUCT "A"
UNIT WEIGHT
(LBS.[kg])
MODEL
SIZE
DIMENSIONAL DATA
Fig.2-5 DIMENSIONS

AMC**S1A - Instruction Manual Multi-Position Air Handler-ECM
5
05
3.1 Vertical Upflow
3.2 Vertical Downflow
3 APPLICATIONS
Upflow is default factory configuration. See Fig.2-5.
If return air is to be ducted, install duct flush with floor.
Use fireproof resilient gasket 1/8 to 1/4 in. thick
between the ducts, unit and floor. Set unit on floor over
opening.
IMPORTANT NOTE
Torque applied to drain connections should not exceed
15ft.lbs. See Fig.2-5 & 3-1.
Fig.3-1 DIMENSIONS FOR FRONT CONNECT COIL
5/16
2-15/16
1-3/8
1-1/4
5/16
2-13/16
1-9/16
2-3/4
Conversion to Vertical Downflow: A vertical upflow
unit may be converted to vertical downflow. Remove
the door and indoor coil and reinstall 180° from original
position. See Fig.3-2.
IMPORTANT: To comply with certification agencies and
the National Electric Code for downflow application, the
circuit breaker(s) on field-installed electric heater kits
must be re-installed per procedure below so that the
breaker switch “on” position and marking is up and,
“off” position and marking is down.
To rotate breaker(s): Rotate one breaker set (circuit)
at a time starting with the one on the right. Loosen
both lugs on the load side of the breaker. (Make
sure that wires are identified and are reinstalled into
proper breaker). Wires are bundled with wire ties,
one bundle going to the right lug and one bundle
going to the left lug.
Using a screwdriver or pencil, lift white plastic tab
with hole away from breaker until breaker releases
from mounting opening.
With breaker held in hand, rotate breaker so that
“on” position is up, “off” position is down with unit in
planned vertical mounting position. Insert right wire
bundle into top right breaker lug, ensuring all
strands of all wires are inserted fully into lug, and no
wire insulation is in lug.
Tighten lug as tight as possible while holding circuit
breaker. Check wires and make sure each wire is
secure and none are loose. Repeat for left wire
bundle in left top circuit breaker lug.
Replace breaker by inserting breaker mounting tab
opposite white pull tab in opening, hook mounting
tab over edge in opening.
With a screwdriver or pencil, pull the blue tab with
hole away from breaker while setting that side of
breaker into opening. When breaker is in place,
release tab, locking circuit breaker into location in
opening.
Repeat above operation for remaining breaker(s) (if
more than one is provided).
Replace single point wiring jumper bar, if it is used,
on line side of breaker and tighten securely.
Double check wires and lugs to make sure all are
secure and tight. Check to make sure unit wiring to
circuit breaker load lugs match that shown on the
unit wiring diagram.
Note
The switch on the front of the panel is only used
with an electric heater.
3.3 Horizontal
Conversion to Horizontal left: A vertical upflow unit
may be converted to horizontal left by removing
indoor coil assembly and reinstalling coil as shown for
left hand air supply. See Fig. 3-2
Secondary drain pan kits are recommended
when the unit is configured for the horizontal
position over a finished ceiling and/or living space.

Multi-Position Air Handler-ECM AMC**S1A - Instruction Manual
6
06
A
1:4
A
RAILS
RAILS
DETAIL A
ENSURE THE RETAINING
CHANNEL IS FULLY
ENGAGED
WITH THE COIL RAIL.
Fig.3-2 VERTICAL DOWNFLOW & HORIZONTAL LEFT APPLICATIONS
(lower front service panel removed “view”.)
AIRFLOW
AIRFLOW
Fig.3-3 INDOOR COIL AND DRAIN PAN SET-UP
HORIZONTAL ADAPTER KIT
VAPOR LINE CONNECTION
LIQUID LINE CONNECTION
PRIMARY DRAIN
CONNECTION
VERTICAL DRAIN PAN
AUXILIARY HORIZONTAL
AUXILIARY UPFLOW/DOWNFLOW
STRAPS
REAR WATER CATCHER
TOP AIR STOP
DRAIN CONNECTION
DRAIN CONNECTION
FRONT WATER CATCHER
STRAPS
60K,61K 36K 24K

AMC**S1A - Instruction Manual Multi-Position Air Handler-ECM
7
07
CAUTION
Horizontal units must be configured for right
hand air supply or left hand air supply. Horizontal
drain pan must be located under indoor coil.
Failure to use the drain pan can result in
property damage.
3.4 Installation In An Unconditioned
Space
IMPORTANT: There are two pairs of coil rails in the air
handler for default and counter flow application. If the air
handler is installed in an unconditioned space, the two
unused coil rails should be removed to minimize air
handler surface sweating. The coil rails can be easily
removed by taking off the 6 mounting screws from both
sides of the cabinet.
Conversion in Horizontal Direction: Horizontal
right-hand supply can be changed to horizontal
left-hand supply by removing the indoor coil and
reinstalling 180° from original.
4. ELECTRICAL WIRING
Field wiring must comply with the National Electric Code
(C.E.C. in Canada) and any applicable local ordinance.
WARNING
Disconnect all power to unit before installing or
servicing. More than one disconnect switch may
be required to de-energize the equipment.
Hazardous voltage can cause severe personal
injury or death.
4.1 Power Wiring
It is important that proper electrical power is available
for connection to the unit model being installed. See the
unit nameplate, wiring diagram and electrical data in
the installation instructions.
Power wiring may be connected to either the right,
left side or top. Three 7/8
" , 1-3/8 " , 1-3/4 " dia.
concentric knockouts are provided for connection of
power wiring to unit.
Power wiring is connected to the power terminal
block in unit electric cabinet.
4.3 Grounding
4.2 Control Wiring
IMPORTANT: Class 2 low voltage control wiring should
not be run in conduit with main power wiring and must
be separated from power wiring, unless class 1 wire of
proper voltage rating is used.
Low voltage control wiring should be 18 Awg.
color-coded. For lengths longer than 100 ft., 16
Awg. wire should be used.
Low voltage control connections are made to low
voltage pigtails extending from top of air
handler (upflow position - see Fig 2-5).
Connections for control wiring are made with wire
nuts. Control wiring knockouts (5/8
" and 7/8 " ) are
also provided on the right and left side of the unit for
side connection.
See wiring diagrams attached to indoor and outdoor
sections to be connected.
Make sure, after installation, separation of control
wiring and power wiring has been maintained.
Grounding may be accomplished by grounding
metal conduit when installed in accordance with
electrical codes to the unit cabinet.
Grounding may also be accomplished by attaching
ground wire(s) to ground lug(s) provided in the unit
wiring compartment.
Ground lug(s) are located close to wire entrance on
left side of unit (up-flow). Lug(s) may be moved to
marked locations near wire entrance on right side of
unit (up-flow). If alternate location is more
convenient.
Use of multiple supply circuits require grounding of
each circuit to lug(s) provided in unit.
WARNING
The unit must be permanently grounded. Failure
to do so can result in electrical shock causing
personal injury or death.
If required, install a branch circuit disconnect of
adequate size, located within sight of, and readily
accessible to the unit.
IMPORTANT: After the Electric Heater is installed,
units may be equipped with one two or three 30-60
amp. circuit breakers. These breaker(s) protect the
internal wiring in the event of a short circuit and
serve as a disconnect. Circuit breakers installed
within the unit do not provide over-current
protection of the supply wiring and therefore may
be sized larger than the branch circuit protection.
Supply circuit power wiring must be 167°C/75°C
minimum copper conductors only. See Electrical
Data in this section for ampacity, wire size and
circuit protector requirement. Supply circuit
protective devices may be either fuses or “HACR”
type circuit breakers.

Multi-Position Air Handler-ECM AMC**S1A - Instruction Manual
8
08
4.5 Heat Kit Data
4.4 Electrical Data
24
36
60/61
208/230
208/230
208/230
60
60
60
1/3
1/2
3/4
5
5
5
2.6
3.0
4.5
15(A)
15(A)
15(A)
VOLTAGE HERTZ HP SPEEDS MAXIMUM CIRCUIT
PROTECTOR
MODEL
CIRCUIT
AMPS.
EHK-05A
EHK-08A
EHK-10A
EHK-05A
EHK-08A
EHK-10A
EHK-15B
EHK-20B
EHK-05A
EHK-08A
EHK-10A
EHK-15B
EHK-20B
24
36
60/61
5
7.5
10
5
7.5
10
15
20
5
7.5
10
15
20
240V
29
42
55
29.4
42.4
55.4
55.4/26.1
55.4/52.1
31.8
44.8
57.8
57.8/26.1
57.8/52.1
208V
25.5
36.8
48.1
25.9
37.2
48.5
48.5/22.6
48.5/45.2
28.3
39.6
50.9
50.9/22.6
50.9/45.2
240V
30
45
60
30
45
60
60/30
60/60
35
45
60
60/30
60/60
208V
30
40
50
30
40
50
50/25
60/50
30
40
60
60/25
60/50
Air
Handler
Model
Electric
Heat (kW)
Min. Circuit
Ampacity
Max. Fuse or
Breaker
(HACR) Ampacity
Minimum Heating Blower Speed
Heater Kit
Model
Used
1 2 345
•
••
•
X
X
X
X
X
X
X
X
X
X
X
•
X
X
X
X
X
X
X
X
X
X
•
•
•
•
•
•
•
•
•
•
•
X
X
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Heat kit suitable for AHU 4-way position installation.
Ampacities for MCA and Fuse/breaker including the blower motor.
Heat pump systems require a specified airflow. Each ton of cooling requires between 350 and 450 cubic feet of air
per minute (CFM), or 400 CFM nominally.
Electric Heater Kits
1
2
3
4
5
EHK-05A
EHK-08A
EHK-10A
EHK-15B
EHK-20B
5kW Heat Strip
7.5kW Heat Strip
10kW Heat Strip
15kW Heat Strip, double Breaker panel
20kW Heat Strip, double Breaker panel
24/36/60/61
24/36/60/61
24/36/60/61
36/60/61
36/60/61
Kit Description Ref.Air Handler
Use
NO.

AMC**S1A - Instruction Manual Multi-Position Air Handler-ECM
9
09
AIRFLOW PERFORMANCE DATA
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
0[0]
590
49
0.77
681
63
0.84
788
86
0.95
883
121
1.21
1103
233
1.97
590
49
0.77
681
63
0.84
788
86
0.95
883
121
1.21
1103
233
1.97
898
78
0.68
1026
109
0.94
1161
148
1.26
1287
194
1.62
1491
290
2.35
898
78
0.68
1026
109
0.94
1161
148
1.26
1287
194
1.62
1491
290
2.35
0.1[.025]
544
57
0.81
633
69
0.87
736
91
0.99
842
128
1.28
1073
241
2.03
544
57
0.81
633
69
0.87
736
91
0.99
842
128
1.28
1073
241
2.03
752
72
0.64
902
99
0.86
1114
158
1.34
1244
205
1.69
1442
298
2.42
752
72
0.64
902
99
0.86
1114
158
1.34
1244
205
1.69
1442
298
2.42
0.2[.050]
511
64
0.84
591
77
0.93
687
100
1.11
796
135
1.32
1036
249
2.09
511
64
0.84
591
77
0.93
687
100
1.11
796
135
1.32
1036
249
2.09
603
65
0.59
810
106
0.91
1052
164
1.39
1186
211
1.75
1396
307
2.49
603
65
0.59
810
106
0.91
1052
164
1.39
1186
211
1.75
1396
307
2.49
0.3[.075]
447
70
0.87
535
83
0.96
648
108
1.14
758
144
1.38
998
258
2.16
447
70
0.87
535
83
0.96
648
108
1.14
758
144
1.38
998
258
2.16
511
60
0.52
694
111
0.95
992
175
1.48
1142
221
1.83
1348
318
2.58
511
60
0.52
694
111
0.95
992
175
1.48
1142
221
1.83
1348
318
2.58
0.4[0.100]
404
75
0.91
490
90
0.99
597
114
1.18
717
151
1.43
967
265
2.22
404
75
0.91
490
90
0.99
597
114
1.18
717
151
1.43
967
265
2.22
405
54
0.46
630
120
1.03
893
187
1.57
1078
233
1.93
1302
325
2.64
405
54
0.46
630
120
1.03
893
187
1.57
1078
233
1.93
1302
325
2.64
0.5[0.125]
345
82
0.94
446
96
1.03
558
121
1.21
681
159
1.47
934
275
2.29
345
82
0.94
446
96
1.03
558
121
1.21
681
159
1.47
934
275
2.29
360
48
0.42
544
126
1.07
825
193
1.61
969
241
1.98
1243
337
2.73
360
48
0.42
544
126
1.07
825
193
1.61
969
241
1.98
1243
337
2.73
0.6[0.150]
311
91
0.99
388
103
1.07
511
128
1.26
642
165
1.54
896
281
2.34
311
91
0.99
388
103
1.07
511
128
1.26
642
165
1.54
896
281
2.34
301
41
0.36
490
135
1.14
768
203
1.69
914
252
2.07
1150
351
2.83
301
41
0.36
490
135
1.14
768
203
1.69
914
252
2.07
1150
351
2.83
0.7[0.175]
273
97
1.02
354
111
1.13
473
133
1.31
599
173
1.59
855
286
2.37
273
97
1.02
354
111
1.13
473
133
1.31
599
173
1.59
855
286
2.37
259
38
0.29
409
140
1.18
694
209
1.73
892
253
2.08
1088
362
2.92
259
38
0.29
409
140
1.18
694
209
1.73
892
253
2.08
1088
362
2.92
0.8[0.200]
239
102
1.11
313
118
1.16
429
142
1.37
524
181
1.64
814
291
2.41
239
102
1.11
313
118
1.16
429
142
1.37
524
181
1.64
814
291
2.41
203
36
0.28
366
148
1.24
646
219
1.81
893
253
2.11
1029
367
2.96
203
36
0.28
366
148
1.24
646
219
1.81
893
253
2.11
1029
367
2.96
Outdoor
Unit
Size(Tons)
Motor
Speed
CFM Wet Coil without filter and Electric Heat
Air
Handler
Model
External Static Pressure-Inches W.C.[kPa]
24
24
36
36
1.5
2
2.5
3
1
2
3
4
5
(Recommended)
(Factory Default)
1
2
3
4
5
(Recommended)
(Factory Default)
1
2
3
4
5
(Factory Default)
1
2
3
4
5
(Factory Default)
5. AIRFLOW PERFORMANCE
Airflow performance data is based on cooling performance with a coil and no filter in place. Select performance table
for appropriate unit size.
External static applied to unit allows operation within the minimum and maximum limits shown in table below for both
cooling and electric heat operation.

Multi-Position Air Handler-ECM AMC**S1A - Instruction Manual
10
10
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
SCFM
Power/W
Current/A
0[0]
1344
143
1.23
1531
200
1.73
1647
244
2.03
1875
340
2.73
2021
409
3.21
1344
143
1.23
1531
200
1.73
1647
244
2.03
1875
340
2.73
2021
409
3.21
1344
143
1.23
1531
200
1.73
1647
244
2.03
1875
340
2.73
2021
409
3.21
1348
157
1.34
1491
205
1.71
1677
281
2.3
1881
391
3.12
2029
426
3.67
0.1[.025]
1284
151
1.26
1477
211
1.74
1592
254
2.11
1822
353
2.79
1967
416
3.29
1284
151
1.26
1477
211
1.74
1592
254
2.11
1822
353
2.79
1967
416
3.29
1284
151
1.26
1477
211
1.74
1592
254
2.11
1822
353
2.79
1967
416
3.29
1280
165
1.4
1439
217
1.81
1633
297
2.41
1843
407
3.25
1988
482
3.8
0.2[.050]
1226
159
1.33
1418
222
1.81
1538
263
2.14
1774
365
2.86
1924
429
3.38
1226
159
1.33
1418
222
1.81
1538
263
2.14
1774
365
2.86
1924
429
3.38
1226
159
1.33
1418
222
1.81
1538
263
2.14
1774
365
2.86
1924
429
3.38
1227
176
1.49
1380
226
1.88
1586
311
2.52
1800
423
3.36
1947
498
3.92
0.3[.075]
1151
168
1.41
1366
231
1.89
1490
273
2.19
1729
375
3.02
1879
447
3.52
1151
168
1.41
1366
231
1.89
1490
273
2.19
1729
375
3.02
1879
447
3.52
1151
168
1.41
1366
231
1.89
1490
273
2.19
1729
375
3
1879
447
3.52
1180
187
1.58
1334
238
1.97
1543
325
2.63
1754
438
3.47
1900
514
4.03
0.4[0.100]
1076
177
1.5
1299
239
2.02
1436
283
2.31
1677
388
3.12
1828
461
3.61
1076
177
1.5
1299
239
2.02
1436
283
2.31
1677
388
3.12
1828
461
3.61
1076
177
1.5
1299
239
2.02
1436
283
2.31
1677
388
3.12
1828
461
3.61
1130
196
1.64
1285
250
2.06
1499
338
2.73
1708
449
3.56
1858
528
4.13
0.5[0.125]
946
191
1.61
1239
250
2.14
1378
300
2.38
1629
399
3.21
1785
471
3.73
946
191
1.61
1239
250
2.14
1378
300
2.38
1629
399
3.21
1785
471
3.73
946
191
1.61
1239
250
2.14
1378
300
2.38
1629
399
3.21
1785
471
3.73
1042
206
1.73
1246
259
2.14
1449
346
2.79
1666
462
3.66
1815
541
4.24
0.6[0.150]
904
197
1.63
1138
266
2.22
1315
305
2.53
1581
412
3.29
1742
487
3.76
904
197
1.63
1138
266
2.22
1315
305
2.53
1581
412
3.29
1742
487
3.76
904
197
1.63
1138
266
2.22
1315
305
2.53
1581
412
3.29
1742
487
3.76
933
225
1.88
1180
269
2.21
1409
358
2.88
1626
474
3.75
1771
553
4.33
0.7[0.175]
893
195
1.61
1064
277
2.31
1215
325
2.64
1533
423
2.38
1694
500
3.86
893
195
1.61
1064
277
2.31
1215
325
2.64
1533
423
2.38
1694
500
3.86
893
195
1.61
1064
277
2.31
1215
325
2.64
1533
423
2.38
1694
500
3.86
871
233
1.94
1047
292
2.39
1370
370
2.98
1590
487
2.84
1716
565
4.41
0.8[0.200]
869
194
1.62
1001
291
2.38
1140
336
2.72
1473
437
3.51
1641
513
4.04
869
194
1.62
1001
291
2.38
1140
336
2.72
1473
437
3.51
1641
513
4.04
869
194
1.62
1001
291
2.38
1140
336
2.72
1473
437
3.51
1641
513
4.04
825
245
2.03
988
300
2.45
1281
386
3.09
1558
498
3.93
1671
572
4.47
Outdoor
Unit
Size(Tons)
Motor
Speed
CFM Wet Coil without filter and Electric Heat
Air
Handler
Model
External Static Pressure-Inches W.C.[kPa]
60
60
60
61
3.5
4
5
6
1
2
3
4
5
(Recommended)
(Recommended)
(Factory Default)
1
2
3
4
5
(Factory Default)
1
2
3
4
5
(Factory Default)
1
2
3
4
5
(Factory Default)
--- Shaded boxes represent airflow outside the required 300-450 cfm/ton, which are not recommended.
NOTES: Airflow based upon cooling performance at 230V with no electric heat and no filter. Airflow at 208V is
approximately the same as 230V because the mult-tap ECM is a constant torque motor. The torque doesn’t drop off at the
speeds in which the motor operates.
The air distribution system has the greatest effect on airflow. The duct system is totally controlled by the contractor. For this
reason, the contractor should use only industry-recognized procedures.

AMC**S1A - Instruction Manual Multi-Position Air Handler-ECM
11
11
Heat pump systems require a specified airflow for electric heat operating. Each ton of cooling requires between 350 and 450
cubic feet of air per minute (CFM), or 400 CFM nominally.
Duct design and construction should be carefully done. System performance can be lowered dramatically through bad
planning or workmanship.
Air supply diffusers must be selected and located carefully. They must be sized and positioned to deliver treated air along the
perimeter of the space. If they are too small for their intended airflow, they become noisy. If they are not located properly,
they cause drafts. Return air grilles must be properly sized to carry air back to the blower. If they are too small, they also
cause noise.
The installers should balance the air distribution system to ensure proper quiet airflow to all rooms in the home. This ensures
a comfortable living space.
An air velocity meter or airflow hood can be used to balance and verify branch and system airflow (CFM).
6. DUCTWORK
Field ductwork must comply with the National Fire
Protection Association NFPA 90A, NFPA 90B and any
applicable local ordinance.
WARNING
Do not, under any circumstances, connect return
ductwork to any other heat producing device
such as fireplace insert, stove, etc.
Unauthorized use of such devices may result in
fire, carbon monoxide poisoning, explosion,
personal injury or property damage.
Sheet metal ductwork in unconditioned spaces must be
insulated and covered with a vapor barrier. Fibrous
ductwork may be used if constructed and installed in
accordance with SMACNA Construction Standard on
Fibrous Glass Ducts. Ductwork must comply with
National Fire Protection Association as tested by UL
Standard 181 for Class I Air Ducts. Check local codes
for requirements on ductwork and insulation.
Duct system must be designed within the range of
external static pressure the unit is designed to
operate against. It is important that the system
airflow be adequate. Make sure supply and return
ductwork, grills, special filters, accessories, etc. are
accounted for in total resistance. See airflow
performance tables in this manual.
Design the duct system in accordance with “ACCA”
Manual “D” Design for Residential Winter and
Summer Air Conditioning and Equipment Selection.
Latest editions are available from: “ACCA” Air
Conditioning Contractors of America, 1513 16th
Street, N.W., Washington, D.C. 20036. If duct
system incorporates flexible air duct, be sure
pressure drop Information (straight length plus all
turns) shown in “ACCA” Manual “D” is accounted for
in the system.
Supply plenum is attached to the 3/4” duct flanges
supplied with the unit. Attach flanges around the
blower outlet.
IMPORTANT: If an elbow is included in the plenum
close to the unit, it can not be smaller than the
dimensions of the supply duct flange on the unit.
IMPORTANT: The front flange on the return duct if
connected to the blower casing must not be
screwed into the area where the power wiring is
located. Drills or sharp screw points can damage
insulation on wires located inside unit.
Secure the supply and return ductwork to the unit
flanges, using proper fasteners for the type of duct
used and tape the duct-to-unit joint as required to
prevent air leaks.
7. REFRIGERANT CONNECTIONS
Keep the coil connections sealed until refrigerant
connections are made. See the Installation Instructions
for the outdoor unit for details on line sizing, tubing
installation, and charging information.
Coil is shipped with Nitrogen. Evacuate the system
before charging with refrigerant.
Install refrigerant tubing so that it does not block service
access to the front of the unit.
Nitrogen should flow through the refrigerant lines while
brazing.
Use a brazing shield to protect the cabinet’s paint and a
wet rag to protect the rubber grommet and input pipe’s
Pistion seal ring from being damaged by torch flames.
After the refrigerant connections are made, seal the gap
around the connections with pressure sensitive gasket.
WARNING
Use a wet rag to protect the two seal rings in the
input pipe from being damaged by torch flames
while brazing.
After the work is finished, make sure to check that there
is no vapor leak after checking for vapor leaks, be sure
to insulate the piping connections referring to Fig.7-1.
Fig.7-1 PIPING CONNECTIONS
Do not leave a gap
Vapor piping
Piping heat insulation
material
Liquid piping
Air
handler
Do not leave a gap

Multi-Position Air Handler-ECM AMC**S1A - Instruction Manual
12
12
7.1 Condensate Drain Tubing
Consult local codes for specific requirements.
Fig.7-2 CONDENSATE DRAIN TRAP
CONDENSATE DRAIN TRAP
3"
3"
UNIT
TO APPROVED DRAIN
DO NOT OPERATE UNIT
WITHOUT CONDENSATE
DRAIN TRAP.
DO NOT OVERTIGHTEN DRAIN
FITTING TOWARD DRAIN
CONNECTION UNIT MUST BE
SLIGHTLY INCLINED
IMPORTANT:
1. When making drain fitting connections to the drain
pan, use a thin layer of Teflon paste, silicone or Teflon
tape and install, hand tighten.
2. When making drain fitting connections to drain pan,
do not overtighten. Over tightening fittings can split pipe
connections on the drain pan.
Install drain lines so they do not block service
access to front of the unit. Minimum clearance of 24
inches is required for filter, coil or blower removal
and service access.
Make sure unit is level or pitched slightly toward
primary drain connection so that water will drain
completely from the pan. (See Fig.7-2)
Do not reduce drain line size less than connection
size provided on condensate drain pan. Use 3/4 "
PVC piping for drain piping connections.
All drain lines must be pitched downward away from
the unit a minimum of 1/8
" per foot of line to ensure
proper drainage.
Do not connect condensate drain line to a closed or
open sewer pipe. Run condensate to an open drain
or run line to a safe outdoor area.
The drain line should be insulated where necessary
to prevent sweating and damage due to condensate
forming on the outside surface of the line.
Make provisions for disconnecting and cleaning of
the primary drain line should it become necessary.
Install a 3 inch trap in the primary drain line as close
to the unit as possible. Make sure that the top of the
trap is below connection to the drain pan to allow
complete drainage of pan. (See Fig. 7-2).
Auxiliary drain line should be run to a place where it
will be noticeable if it becomes operational.
Homeowner should be warned that a problem
exists if water should begin running from the
auxiliary drain line.
Plug the unused drain connection with the plugs
provided in the parts bag, using a thin layer of teflon
paste, silicone or teflon tape to form a water tight
seal.
8. AIR FILTER
(Not Factory-Installed)
External filter or other means of filtration is required.
Units should be sized for a maximum of 300 feet/min air
velocity or what is recomm-ended for the type filter
installed.
Filter
application and placement are critical to airflow,
which may affect the heating and cooling system
performance. Reduced airflow can shorten the life of the
system’s major components, such as motor, limits,
elements, heat relays, evaporator coil or compressor.
Consequently, we recommend that the return air duct
system
have only one filter location. For systems with
a return air filter grill or multiple filter grills, you can have
a filter installed at each of the return air openings.
If adding high efficiency filters or electronic air filtration
systems, it is very important that the air flow is not
reduced. If air flow is reduced the overall performance
and efficiency of the unit will be reduced. It is strongly
recommended that a professional installation technician
is contacted to ensure installation of these such filtration
systems are installed correctly.
IMPORTANT:
Do not double filter the return air duct
system. Do not filter the supply air duct system. This will
change the performance of the unit and reduce airflow.
WARNING
Do not operate the system without filters. A
portion of the dust entrained in the air may
temporarily lodge in the duct and run at the
supply registers. Any circulated dust particles
could be heated and charred by contact with the
air handler heating elements. This residue could
soil ceilings, walls, drapes, carpets and other
articles in the house.
Soot damage may occur with filters in place,
when certain types of candles, oil lamps or
standing pilots are burned.
Test condensate drain pan and drain line after installation is
complete. Pour water into drain pan, enough to fill drain trap
and line. Check to make sure drain pan is draining
completely, no leaks are found in drain line fittings, and water
is draining from the termination of the primary drain line.
Be sure to insulate the drain piping and drain socket since
condensation may cause water leakage.
Be sure to install a drain trap at the drain outlet since the
inside of the unit is at negative pressure relative to
atmospheric pressure during operation.

AMC**S1A - Instruction Manual Multi-Position Air Handler-ECM
13
13
9. FILTER INSTALLATION DIMENSIONS
NOTE:
Air filter is optional part, isn't factory-installed.
Fig.9-1 EXTERNAL FILTER BASE
FILTER RAILS
FILTER COVER
MANUAL BOLT
RETURN AIR OPENING DEPTH
W
B
A
D
H
DIMENSIONAL DATA
24
36
60/61
16Χ20[406Χ508]
18Χ20[457Χ508]
20Χ22[508Χ559]
16.8[426]
18.3[466]
20.7[526]
20.4[518]
21.6[548]
23.9[608]
1[25.4]
1[25.4]
1[25.4]
19.6
20.8
23
14.8
16.3
18.8
FILTER SIZE
IN [mm]
"W" IN [mm] "D" IN [mm] "H" IN [mm] Return length
MODEL "B" IN
MODEL
Return width
"A" IN
AIR FILTER REMOVAL
1. Remove bolts manually, remove air filter cover. See in Fig.9-1.
2. Hold the edge of the air filter and extract out.
3. Clean the air filter (Vacuum cleaner or pure water may be used to clean the air filter. If the dust accumulation is too
heavy, use soft brush and mild detergent to clean it and dry out in cool place). See in Fig.9-2.
4. Install new filter so that the arrow on the filter is in the same direction as airflow.
Fig.9-2 AIR FILTER CLEAN

Multi-Position Air Handler-ECM AMC**S1A - Instruction Manual
14
14
10. WIRING DIAGRAM
10.1 For 24/36/60 Model
Fig.10-1 CONTROL WIRING FOR AC SYSTEMS
Fig.10-2 CONTROL WIRING FOR HP SYSTEMS
RED
GREEN
24RC
G Fan
Y1 Comp
W1/B
THERMOSTAT
INDOOR UNIT OUTDOOR UNIT
GRC YC
BLACK
YELLOW
BLACK
W1 W2
24C
W2
WHITE
BLACK/WHITE
RED
GREEN
W2
G Fan
Y1 Comp
W1/B
THERMOSTAT
INDOOR UNIT OUTDOOR UNIT
GRC CB
BLACK
YELLOW
BLACK
W1 Y W
24C
24RC
RED
BLUE
PURPLE
WHITE
W2
BLACK/WHITE

AMC**S1A - Instruction Manual Multi-Position Air Handler-ECM
15
16
HIGH VOLTA GE !
DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS
UNIT. M U LT IPLE POWER SOURCES MAY BE PRESENT. FAI LURE TO
DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
5
4
3
1
2
ON
1
3
4
5
32
ON
1 32
ON
1 32
ON
1 32
SCHEMATIC DIAGRAM
SEE RATING PLATE FOR VOLTS&HERTZ
FIELD POWER WIRING
RED
BLACK
WHITE
GREEN
WHITE/BLACK
Factory code Date Revision
16023000013093 Jul. 26, 2022 A
CAUTION:
NOT SUITABLE FOR USE ON SYSTEMS EXCEEDING 150V TO GROUND
ATTENTION:
NE CONVIENT PAS AUXINSTALLATIONS DE PLUS DE 150V ALA TERRE
DIP SWITCH SW1 SETTINGS
SPEED
MEDIUM HIGH
MEDIUM
HIGH
SPEED TAPS
LOW
SEE NOTE 6
HIGH
MEDIUM HIGH
MEDIUM
MEDIUM LOW
(C)
GND
(N)
(L)
(5)
(4)
(3)
(2)
(1)
FAN
MOTOR
R
W2
G
W1
C
W2
CN1
CN4
SW1
CN6
HEATER KIT PLUG
CN2
CN17 CN3 CN19 CN19 CN8 CN17
THE WIRING DIAGRAM SHOWN IS FOR REFERENCE ONLY, ACTUAL PRODUCT MAY VARY.
OUTPUT:24V~
TFMR
RED
RED
RED
RED
BLACK
BLACK
FAN MOTOR
Y/G
BROWN
WHITE
PURPLE
BLUE
YELLOW
PLUG LIATE
N 1234
5CLGGND
GND
L1L2
POWER
SEE TABLE BELOW FOR
MOTOR WIRE COLORS
TFMR TRANSFORMER
GND GROUND
OPTIONAL
FIELD POWER WIRING
FM WIRE CONFIG 1
FM WIRE CONFIG 2
YELLOW Y/G BLACK BLACK
BLUEORANGEWHITEGRAYBROWN
N GND L 1 2
3
45C
BLUE GREEN RED BLACKYELLOWBROWN GRAY
PINK
WHITE
NOTES:
1:Use copper wire (75°C min) only between disconnect switch and unit.
2:To be wired in accordance with NEC and local codes.
3:If any of the original wire, as supplied, must be replaced. Use the
same or equivalent type wire.
4:Connect R to R, G to G, etc. See outdoor instruction for details.
5:To change speed tap, adjust dip switches (SW1).
6:See airflow tables for airflow settings.
FM FAN MOTOR
MODEL
/
24K/60K
36K
ACCORDING TO
SETTING TABLE
DIAL
CODE
Fig.10-3 INDOOR UNIT WIRING DIAGRAM FOR ECM AC SYSTEMS AND HP SYSTEMS

Multi-Position Air Handler-ECM AMC**S1A - Instruction Manual
16
17
10.2 For 61 Model
Fig.10-4 CONTROL WIRING FOR A/C SYSTEMS
Y1 YELLOW
RRED
CBROWN
GGREEN
Y2 PURPLE
Dh GRAY
BBLUE
W1 WHITE
W2 WHITE/BLACK
Y2
C
Y
C G
THERMOSTAT
INDOOR UNIT OUTDOOR UNIT
G
R
O/B
H/DH
W2
W1 CY
B
Dh Y1 R
GRAY PURPLE BROWN BLUE GREEN RED YELLOW BROWN YELLOW
Support 1H and 1C thermostat
Fig.10-5 CONTROL WIRING FOR H/P SYSTEMS
Y1 YELLOW
RRED
CBROWN
GGREEN
Y2 PURPLE
Dh GRAY
BBLUE
W1 WHITE
W2 WHITE/BLACK
Support 4H and 2C thermostat
Y2
W/E
C
Y
C G
THERMOSTAT
INDOOR UNIT OUTDOOR UNIT
G
R
O/B
H/DH
W2
W1 CYBW
B
Dh Y1 R
W2
GRAY PURPLE BROWN BLUE GREEN RED YELLOW WHITE WHITE/BLACK BROWN YELLOW BLUE WHITE
Y2

AMC**S1A - Instruction Manual Multi-Position Air Handler-ECM
18
Fig.10-6 INDOOR UNIT WIRING DIAGRAM FOR ECM AC SYSTEMS AND HP SYSTEMS
HIGH VOLTA GE !
DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS
UNIT. M U LT IPLE POWER SOURCES MAY BE PRESENT. FAI L URE TO
DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
COM208V240V
5
4
3
1
WHITE/BLACK
W2
CN35
2
CN33
CN4 CN5
SPEED TAPS
WHITE
GRAY
BLUE
MEDIUM LOW
LOW
MEDIUM
MEDIUM HIGH
HIGH
B W1 Y2
GREEN
RED
YELLOW
R
C
Y1
PURPLE
BROWN
CN38
CN39
L1-A
L1-B
CN36
T2 T1
LED4
INDOOR MAIN BOARD
POWER ON
ON
NORMAL
C
CN6
G
SCHEMATIC DIAGRAM
SEE RATING PLATE FOR VOLT&HERTZ
FIELD POWER WIRING
1 2 3 4 5
54321C
N G L C
HEATER
KIT PLUG
1 2 3 4 5
N G L C
PLUG LIATE
POWER IN
6
SW6
BLACK
BLACK
RED
RED
RED
NOTES:
1: If connected to the 1-Stage controller, please short the signals Y1 and Y2.
2: Use copper wire (75℃min) only between disconnect switch and unit .
3: To be wired in accordance with NEC and local codes.
4: If any of the original wire, as supplied, must be replaced. Use the same
or equivalent type wire.
5: Connect R to R, G to G, Y1 to Y, etc. See outdoor instruction for details.
6: If some signal lines of CN4 and CN5 are not used, please Wrap them up
separately with cap.
7: See airflow tables for airflow settings.
8: When need to change the transformer stage, remove the lead from “240V”
terminal and then connect the lead to “208V” terminal.
24V~
1 2 3 4 5
WHITE YELLOW
BLUE PURPLE
GREEN
N G L C
TRANSFORMER
FAN
LED4 INDICATION DESCRIPTION
BROWN
W2
W1
Dh
ON
1
OFF
1
DETAILED REFERENCE
MANUAL INSTRUCTIONS
SW6-1,2
SW6-3
NORMAL
HEAT:
FAN START
RESERVED
ON
ON
ON
ON
SW6-4
1 2
ON
Y1+Y2
OR W
Y1 OR G
1
1
2
3
2
3
4
5
*THE FACTORY DEFAULT
RESERVED
FAN SPEED
TAPS
*
*
*
BLACK BLOCK
IS BUTTON
3
ON
4
ON
4
1 2
1 2
1 2
1 2
ON
3
Y/G
10K RESISTANCE
10K RESISTANCE
YELLOW
THE WIRING DIAGRAM SHOWN
IS FOR REFERENCE ONLY,
ACTUAL PRODUCT MAY VARY.
L2 L1
61K
CAUTION:
NOT SUITABLE FOR USE ON SYSTEMS EXCEEDING 150V TO GROUND.
ATTENTION:
NE CONVIENT PAS AUXINSTALLATIONS DE PLUS DE 150V ALA TERRE.
Switch ON Position:
Color upper half to
show switch position
is UP.
Switch OFF Position:
Color upper half to
show switch position
is DOWN.
Factory code Date Revision
16023000013092 Jul. 26, 2022 A
T1: RETURN AIR TEMPERATURE SENSOR
T2: INDOOR COIL TEMPERATURE SENSOR
17