Century AMC60S1A-CY 60K MULTI-POSITION A/H CT Installation, Operation & Maintenance Manual

INSTALLER’S GUIDE
SE Series UNITS
CONDENSING
High Efficiency Air Handlers
Multi-Position
Air Handler
2-5Tons
R410a
AMC**S1A
ECM
Instruction Manual
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.
517.787.2100 • www.marsdelivers.com
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.
WARNING
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.”
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.
Multi-Position Air Handler-ECM
AMC**S1A - Instruction Manual
CONTENTS
1 SAFETY
01
2 GENERAL
2.1 Unit Dimensions
04
3 APPLICATIONS
3.1
3.2
3.3
3.4
Vertical Upflow
Vertical Downflow
Horizontal
Installation In An Unconditioned Space
05
05
05
07
4 ELECTRICAL WIRING
4.1
4.2
4.3
4.4
4.5
Power Wiring
Control Wiring
Grounding
Electrical Data
Heat Kit Data
07
07
07
08
08
5 AIRFLOW PERFORMANCE
09
6 DUCTWORK
11
7 REFRIGERANT CONNECTIONS
7.1 Condensate Drain Tubing
12
8 AIR FILTER (not factory-installed)
12
9 FILTER INSTALLATION DIMENSIONS
13
10 WIRING DIAGRAM
10.1 For 24/36/60 Model
10.1 For 61 Model
11 PISTON/TXV INSTALLATION
14
17
20
AMC**S1A - Instruction Manual
Multi-Position Air Handler-ECM
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.
WARNING
The unit must be permanently grounded. Failure
to do so can result in electrical shock causing
personal injury or death.
WARNING
1 SAFETY
PROPOSITION 65: This appliance contains
fiberglass insulation. Respirable particles of
fiberglass are known to State of California to
cause cancer.
This is a safety alert symbol. When you see
this symbol on labels or in manuals, be alert
to the potential for personal injury.
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.
This is an attention alert symbol. When you
see this symbol on labels or in manuals, be
alert to the potential for personal injury.
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.
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.
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.
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.
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.
WARNING
Glass Wool (Fiberglass) Insulation
Carbon Monoxide (CO)
Formaldehyde
Benzene
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.
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.
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.
1
Multi-Position Air Handler-ECM
CAUTION
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.
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).
AMC**S1A - Instruction Manual
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.
WARNING
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.
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.
AIRFLOW
≥40"
≥40"
Fig.2-1 CLEARANCES IN THE HORIZONTAL POSITION
≥0
≥0
≥0
≥25"
Front of unit
Fig.2-2 CLEARANCES IN THE VERTICAL POSITION
2
AMC**S1A - Instruction Manual
Multi-Position Air Handler-ECM
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 .
Drain piping
Second drain pan
Second drain pan Drain piping
Fig.2-3 INSTALLED VERTICALLY
Fig.2-4 INSTALLED HORIZONTALLY
03
3
Multi-Position Air Handler-ECM
AMC**S1A - Instruction Manual
2.1 Unit Dimensions
NOTE: 25” CLEARANCE IS REQUIRED IN THE FRONT
OF THE UNIT FOR FILTER AND COIL MAINTENANCE.
ELECTRICAL CONNECTIONS
MAY EXIT TOP OR EITHER SIDE
SUPPLY AIR
FLANGES ARE PROVIDED
FOR FIELD INSTALLATION
W
A
HIGH VOLTAGE CONNECTION 7/8”,
1-3/8”, 1-3/4” DIA KNOCK OUTS
10
5
16
LOW VOLTAGE CONNECTION
BREAKER SWITCH
(FOR ELECTRIC HEATER ONLY)
H
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)
D
PRIMARY DRAIN CONNCETION 3/4"
FEMALE PIPE THREAD (NPT)
UPFLOW UNIT SHOWN;
UNIT MAY BE INSTALLED UPFLOW, DOWNFLOW,
HORIZONTAL RIGHT OR LEFT AIR SUPPLY.
Fig.2-5 DIMENSIONS
DIMENSIONAL DATA
MODEL
SIZE
UNIT HEIGHT
"H" IN. [mm]
UNIT WIDTH
"W" IN. [mm]
UNIT LENGHT
"D" IN. [mm]
SUPPLY DUCT "A"
UNIT WEIGHT
(LBS.[kg])
24
41-3/8"[1050]
18-1/8"[460]
20-1/2"[520]
16"[406]
99/[45]
36
46-1/2"[1180]
19-5/8"[500]
21-5/8"[550]
18"[456]
121/[55]
60
54-1/2"[1385]
22"[560]
24"[610]
19-1/2"[496]
152/[69]
61
54-1/2"[1385]
22"[560]
24"[610]
19-1/2"[496]
159/[72]
Table 2-1
4
AMC**S1A - Instruction Manual
Multi-Position Air Handler-ECM
3 APPLICATIONS
Replace breaker by inserting breaker mounting tab
opposite white pull tab in opening, hook mounting
tab over edge in opening.
3.1 Vertical Upflow
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.
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.
Repeat above operation for remaining breaker(s) (if
more than one is provided).
IMPORTANT NOTE
Replace single point wiring jumper bar, if it is used,
on line side of breaker and tighten securely.
Torque applied to drain connections should not exceed
15ft.lbs. See Fig.2-5 & 3-1.
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.
2-3/4
1-9/16
3.3 Horizontal
2-15/16
5/16 1-3/8
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
5/16
2-13/16
1-1/4
Secondary drain pan kits are recommended
when the unit is configured for the horizontal
position over a finished ceiling and/or living space.
Fig.3-1 DIMENSIONS FOR FRONT CONNECT COIL
3.2 Vertical Downflow
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.
5
Multi-Position Air Handler-ECM
AMC**S1A - Instruction Manual
A
1:4
ENSURE THE RETAINING
CHANNEL IS FULLY
ENGAGED
WITH THE COIL RAIL.
DETAIL A
RAILS
AIRFLOW
A
AIRFLOW
RAILS
Fig.3-2 VERTICAL DOWNFLOW & HORIZONTAL LEFT APPLICATIONS
(lower front service panel removed “view”.)
STRAPS
REAR WATER CATCHER
TOP AIR STOP
HORIZONTAL ADAPTER KIT
VAPOR LINE CONNECTION
LIQUID LINE CONNECTION
FRONT WATER CATCHER
AUXILIARY HORIZONTAL
DRAIN CONNECTION
VERTICAL DRAIN PAN
PRIMARY DRAIN
CONNECTION
AUXILIARY UPFLOW/DOWNFLOW
DRAIN CONNECTION
60K,61K 36K
24K
STRAPS
Fig.3-3 INDOOR COIL AND DRAIN PAN SET-UP
6
AMC**S1A - Instruction Manual
Multi-Position Air Handler-ECM
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.
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.
Power wiring is connected to the power terminal
block in unit electric cabinet.
4.2 Control Wiring
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.
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.
3.4 Installation In An Unconditioned
Space
Low voltage control wiring should be 18 Awg.
color-coded. For lengths longer than 100 ft., 16
Awg. wire should be used.
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.
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.
4. ELECTRICAL WIRING
See wiring diagrams attached to indoor and outdoor
sections to be connected.
Field wiring must comply with the National Electric Code
(C.E.C. in Canada) and any applicable local ordinance.
Make sure, after installation, separation of control
wiring and power wiring has been maintained.
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.
4.3 Grounding
WARNING
The unit must be permanently grounded. Failure
to do so can result in electrical shock causing
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.
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.
If required, install a branch circuit disconnect of
adequate size, located within sight of, and readily
accessible to the unit.
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.
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.
Use of multiple supply circuits require grounding of
each circuit to lug(s) provided in unit.
7
Multi-Position Air Handler-ECM
AMC**S1A - Instruction Manual
4.4 Electrical Data
MODEL
VOLTAGE
HERTZ
HP
SPEEDS
CIRCUIT
AMPS.
MAXIMUM CIRCUIT
PROTECTOR
24
208/230
60
1/3
5
2.6
15(A)
36
208/230
60
1/2
5
3.0
15(A)
60/61
208/230
60
3/4
5
4.5
15(A)
4.5 Heat Kit Data
Air
Electric
Handler
Heat (kW)
Model
Heater Kit
Model
Used
Max. Fuse or
Breaker
(HACR) Ampacity
Min. Circuit
Ampacity
240V
208V
240V
208V
5
29
25.5
30
30
7.5
42
36.8
45
40
10
55
48.1
60
50
EHK-05A
5
29.4
25.9
30
30
EHK-08A
7.5
42.4
37.2
45
40
10
55.4
48.5
60
50
EHK-05A
24
EHK-08A
EHK-10A
EHK-10A
36
EHK-15B
15
55.4/26.1 48.5/22.6
60/30
50/25
EHK-20B
20
55.4/52.1 48.5/45.2
60/60
60/50
EHK-05A
5
31.8
28.3
35
30
EHK-08A
7.5
44.8
39.6
45
40
57.8
50.9
EHK-10A
10
60
60
EHK-15B
15
57.8/26.1 50.9/22.6
60/30
60/25
EHK-20B
20
57.8/52.1 50.9/45.2
60/60
60/50
60/61
Minimum Heating Blower Speed
1
2
X
X
X
X
3
• • •
•
•
• • •
• •
•
•
•
•
•
•
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
4
•
•
•
•
•
•
•
•
•
•
•
•
•
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
NO.
Kit
Description
Ref.Air Handler
Use
1
EHK-05A
5kW Heat Strip
24/36/60/61
2
EHK-08A
7.5kW Heat Strip
24/36/60/61
3
EHK-10A
10kW Heat Strip
24/36/60/61
4
EHK-15B
15kW Heat Strip, double Breaker panel
36/60/61
5
EHK-20B
20kW Heat Strip, double Breaker panel
36/60/61
8
5
•
•
•
•
•
•
•
•
•
•
•
•
•
AMC**S1A - Instruction Manual
Multi-Position Air Handler-ECM
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.
AIRFLOW PERFORMANCE DATA
Outdoor
Air
Unit
Handler
Model Size(Tons)
1
2
24
1.5
3
(Recommended)
4
(Factory Default)
5
1
2
24
2
3
4
(Factory Default)
5
1
2
36
2.5
3
4
(Recommended)
5
(Factory Default)
1
2
36
3
CFM Wet Coil without filter and Electric Heat
Motor
Speed
3
4
5
(Factory Default)
External Static Pressure-Inches W.C.[kPa]
0[0]
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
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] 0.2[.050] 0.3[.075] 0.4[0.100] 0.5[0.125] 0.6[0.150] 0.7[0.175] 0.8[0.200]
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
9
1442
298
2.42
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
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
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
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
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
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
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
Multi-Position Air Handler-ECM
Outdoor
Air
Unit
Handler
Model Size(Tons)
AMC**S1A - Instruction Manual
1
2
60
3.5
3
(Recommended)
4
(Factory Default)
5
1
2
60
4
3
(Recommended)
4
(Factory Default)
5
1
2
60
5
3
4
(Factory Default)
5
1
2
61
6
CFM Wet Coil without filter and Electric Heat
Motor
Speed
3
4
(Factory Default)
5
External Static Pressure-Inches W.C.[kPa]
0[0]
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
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] 0.2[.050] 0.3[.075] 0.4[0.100] 0.5[0.125] 0.6[0.150] 0.7[0.175] 0.8[0.200]
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
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
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
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
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
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
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
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
--- 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.
10
10
AMC**S1A - Instruction Manual
Multi-Position Air Handler-ECM
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
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.
Field ductwork must comply with the National Fire
Protection Association NFPA 90A, NFPA 90B and any
applicable local ordinance.
7. REFRIGERANT CONNECTIONS
WARNING
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.
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.
WARNING
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.
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.
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.
Do not leave a gap
Vapor piping
Supply plenum is attached to the 3/4” duct flanges
supplied with the unit. Attach flanges around the
blower outlet.
Air
handler
Piping heat insulation
material
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.
Liquid piping
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.
Do not leave a gap
Fig.7-1 PIPING CONNECTIONS
11
Multi-Position Air Handler-ECM
AMC**S1A - Instruction Manual
7.1 Condensate Drain Tubing
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.
Consult local codes for specific requirements.
CONDENSATE DRAIN TRAP
Be sure to insulate the drain piping and drain socket since
condensation may cause water leakage.
DO NOT OPERATE UNIT
WITHOUT CONDENSATE
DRAIN TRAP.
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.
DO NOT OVERTIGHTEN DRAIN
FITTING TOWARD DRAIN
CONNECTION UNIT MUST BE
SLIGHTLY INCLINED
3"
3"
UNIT
8. AIR FILTER
(Not Factory-Installed)
TO APPROVED DRAIN
Fig.7-2 CONDENSATE DRAIN TRAP
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.
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.
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.
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)
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.
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.
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.
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.
WARNING
The drain line should be insulated where necessary
to prevent sweating and damage due to condensate
forming on the outside surface of the line.
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.
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.
12
AMC**S1A - Instruction Manual
Multi-Position Air Handler-ECM
9. FILTER INSTALLATION DIMENSIONS
FILTER RAILS
FILTER COVER
H
MANUAL BOLT
RE
TU
RN
AIR
A
OP
D
EN
IN
G
B
DE
PT
W
H
NOTE:
Air filter is optional part, isn't factory-installed.
Fig.9-1 EXTERNAL FILTER BASE
DIMENSIONAL DATA
MODEL
FILTER SIZE
IN [mm]
"W" IN [mm]
"D" IN [mm]
"H" IN [mm]
Return width
"A" IN
Return length
MODEL "B" IN
24
16Χ20[406Χ508]
16.8[426]
20.4[518]
1[25.4]
19.6
14.8
36
18Χ20[457Χ508]
18.3[466]
21.6[548]
1[25.4]
20.8
16.3
60/61
20Χ22[508Χ559]
20.7[526]
23.9[608]
1[25.4]
23
18.8
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
13
Multi-Position Air Handler-ECM
AMC**S1A - Instruction Manual
10. WIRING DIAGRAM
10.1 For 24/36/60 Model
THERMOSTAT
24C
24RC
G
R
C
W1
W2
BLACK
YELLOW
BLACK/WHITE
WHITE
BLACK
RED
G Fan
GREEN
W1/B
W2
Y1 Comp
Y
INDOOR UNIT
C
OUTDOOR UNIT
Fig.10-1 CONTROL WIRING FOR AC SYSTEMS
THERMOSTAT
W2
W1/B
24C
G
R
C
W1 W2
INDOOR UNIT
C
PURPLE
B
OUTDOOR UNIT
Fig.10-2 CONTROL WIRING FOR HP SYSTEMS
14
Y
BLUE
YELLOW
BLACK
RED
WHITE
BLACK
RED
G Fan
GREEN
Y1 Comp
BLACK/WHITE
24RC
W
AMC**S1A - Instruction Manual
Multi-Position Air Handler-ECM
HIGH VOLTAGE!
DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS
UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO
DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
CAUTION:
NOT SUITABLE FOR USE ON SYSTEMS EXCEEDING 150V TO GROUND
SEE RATING PLATE FOR VOLTS&HERTZ ATTENTION:
FIELD POWER WIRING NE CONVIENT PAS AUXINSTALLATIONS DE PLUS DE 150V ALA TERRE
SCHEMATIC DIAGRAM
DIP SWITCH SW1 SETTINGS
HEATER KIT PLUG
RED
BLACK
WHITE
GREEN
WHITE/BLACK
R
C
W1
G
W2
DIAL
CODE
MODEL
CN4
CN6
W2
ON
1 23
CN1
ON
/
SW1
ACCORDING TO
SETTING TABLE
1 23
ON
24K/60K
1 23
ON
OUTPUT:24V~
CN17
CN17
CN8
CN19
CN19
CN3
36K
CN2
1
TFMR
RED
N G L C
5
4
RED
PURPLE
WHITE
BLUE
GND
YELLOW
Y/G
BROWN
RED
BLACK
1 23
3
MEDIUM
4
MEDIUM HIGH
5
HIGH
SPEED TAPS
LOW
RED
2
MEDIUM LOW
BLACK
3
MEDIUM
4
MEDIUM HIGH
PLUG LIATE
5
HIGH
SEE NOTE 6
3 2 1
L2 L1
SEE TABLE BELOW FOR
MOTOR WIRE COLORS
GND
FAN MOTOR
SPEED
POWER
(1)
(2)
(L)
FAN
(3)
(N) MOTOR (4)
(5)
GND
(C)
3
1
N
GND
L
C
5
4
2
Y/G
BLACK BROWN
BLACK
FM WIRE CONFIG 1 YELLOW
GRAY
WHITE ORANGE BLUE
GREEN
RED
PINK
BROWN YELLOW BLACK
FM WIRE CONFIG 2
BLUE
WHITE
GRAY
NOTES:
FM
FAN MOTOR
TFMR TRANSFORMER
1:Use copper wire (75°C min) only between disconnect switch and unit.
GND GROUND
2:To be wired in accordance with NEC and local codes.
OPTIONAL
3:If any of the original wire, as supplied, must be replaced. Use the
FIELD POWER WIRING
same or equivalent type wire.
4:Connect R to R, G to G, etc. See outdoor instruction for details.
Factory code
Date
Revision
5:To change speed tap, adjust dip switches (SW1).
6:See airflow tables for airflow settings.
16023000013093 Jul. 26, 2022
A
THE WIRING DIAGRAM SHOWN IS FOR REFERENCE ONLY, ACTUAL PRODUCT MAY VARY.
Fig.10-3 INDOOR UNIT WIRING DIAGRAM FOR ECM AC SYSTEMS AND HP SYSTEMS
15
Multi-Position Air Handler-ECM
AMC**S1A - Instruction Manual
10.2 For 61 Model
Support 1H and 1C thermostat
Y
R
G
C
O/B
Y2
Y1
YELLOW
R
BROWN
G
PURPLE
C
YELLOW
RED
B
GREEN
Dh
BROWN
BLUE
THERMOSTAT
GRAY
H/DH
W1
W2
Y
C
INDOOR UNIT
Y1
R
C
G
Y2
Dh
B
W1
W2
Y E L LO W
RED
BROWN
GREEN
P U R PL E
GRAY
BLUE
W H I TE
W H I TE / B L AC K
Y1
R
C
G
Y2
Dh
B
W1
W2
Y E L LO W
RED
BROWN
GREEN
P U R PL E
GRAY
BLUE
W H I TE
W H I TE / B L AC K
OUTDOOR UNIT
Fig.10-4 CONTROL WIRING FOR A/C SYSTEMS
Support 4H and 2C thermostat
W2
W/E
Y2
Y
R
G
Y1
Y2
W1
W2
C
INDOOR UNIT
Y
B
WHITE
BLUE
YELLOW
R
BROWN
G
WHITE
RED
C
PURPLE
GREEN
B
YELLOW
BROWN
Dh
BLUE
THERMOSTAT
GRAY
H/DH
WHITE/BLACK
C
O/B
W
OUTDOOR UNIT
Fig.10-5 CONTROL WIRING FOR H/P SYSTEMS
16
AMC**S1A - Instruction Manual
Multi-Position Air Handler-ECM
HIGH VOLTAGE!
DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS
UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO
DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
SCHEMATIC DIAGRAM
SEE RATING PLATE FOR VOLT&HERTZ
FIELD POWER WIRING
DETAILED REFERENCE
MANUAL INSTRUCTIONS
CAUTION:
NOT SUITABLE FOR USE ON SYSTEMS EXCEEDING 150V TO GROUND.
BLACK BLOCK Y1 OR G Y1+Y2
IS BUTTON
OR W
ATTENTION:
NE CONVIENT PAS AUXINSTALLATIONS DE PLUS DE 150V ALA TERRE.
ON
YELLOW
1
2
1
3
2
4
3
5
12
ON
TRANSFORMER
24V~
SW6-1,2
HEATER
KIT PLUG
YELLOW
RED
GREEN
BROWN
PURPLE
GRAY
BLUE
WHITE
ON
12
61K
CN5
Y1
R
C
G
Y2
CN4
Dh
B
W2
W1
CN6
W1
W2
C
CN33
ON
12
ON
RESERVED
LED4
5
5
INDOOR MAIN BOARD
L2
T2
3
ON
HEAT:
FAN START
3
ON
RESERVED
*
T1
10K RESISTANCE
CN36 10K RESISTANCE
PLUG LIATE
BLACK
L1-A
CN38
CN39
L1-B
RED
RED
*
SW6
CN35
5 4 3 2 1 C
RED
BLACK
N G L C
N G L C
SW6-3
SW6-4
FAN
Y/G
*
6
4
4
BROWN
PURPLE
3
3
BLUE
2
2
YELLOW
WHITE
GREEN
1
1
WHITE/BLACK
240V 208V COM
12
FAN SPEED
TAPS
4
ON
NORMAL
4
*THE FACTORY DEFAULT
ON
Switch ON Position:
Color upper half to
show switch position
is UP.
1
1
2
3
4
Switch OFF Position:
Color upper half to
show switch position 1
is DOWN.
OFF
SPEED TAPS
5
1
2
3
4
5
L1
POWER IN
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.
N
G
L
C
MEDIUM LOW
MEDIUM
MEDIUM HIGH
HIGH
LED4 INDICATION DESCRIPTION
POWER ON
NORMAL
ON
T1: RETURN AIR TEMPERATURE SENSOR
T2: INDOOR COIL TEMPERATURE SENSOR
Factory code
Date
Revision
16023000013092
Jul. 26, 2022
A
THE WIRING DIAGRAM SHOWN
IS FOR REFERENCE ONLY,
ACTUAL PRODUCT MAY VARY.
Fig.10-6 INDOOR UNIT WIRING DIAGRAM FOR ECM AC SYSTEMS AND HP SYSTEMS
17
LOW
6
5
4
3
2
1
6
5
4
3
2
1
C
0
1
0
1
0
1
0
1
RED
BLACK
WHITE W1
C
BLUE
BLACK
BROWN WHITE
BLACK
BLACK/WHITE
W2
WHITE
BLACK
2
6
2
6
2
6
2
6
18
6
5
4
3
2
1
6
5
4
3
2
1
C
HEATER KIT PLUG
6
2
4
RED
BLACK
YELLOW
BLUE
CB CIRCUIT BREAKER
LS LIMIT SWITCH
FL FUSE LINK
RELAY1
8
LS
FL
FL
FL
FL
L2
L1
CB2
CB1
FL
POWER
L2’
L1’
2
1
ELEMENTS
4
3
CB1
POWER
L2
L1
4
3
L2’
BLACK
BLACK
L1’
2
1
LS ELEMENTS
LS ELEMENTS
YELLOW
YELLOW
LS ELEMENTS
LS ELEMENTS
L2
4
3
L2’
POWER
L1
2
1
L1’
BLACK
BLACK
6
5
4
3
2
1
6
5
4
3
2
1
NOTE1
6
5
4
3
2
1
0
1
RED
2
6
2
6
4
8
4
8
RED
RED
BLUE
BLUE
RELAY2
RELAY1
RELAY2
2
6
2
6
2
6
4
8
4
8
4
8
RED
RED
BLUE
BLUE
RED
BLUE
YELLOW
BLACK
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
Fig.10-7: INDOOR UNIT WIRING DIAGRAM FOR ELECTRIC HEAT
LS
ELEMENTS
CB1
4
3
L2
L2’
BLACK
BLACK
FL
FL
FL
4
3
L2
L2’
POWER
L1
2
1
CB2:30A
L1’
10kW CB1 60A
7.5kW CB1 50A
POWER
L2
4
3
L2’
BLACK
L1
POWER
L1
2
1
L1’
ELEMENTS
CB1:60A
LS
LS
FL
FL
BLACK
L1’
2
1
ELEMENTS
ELEMENTS
ELEMENTS
LS
LS
YELLOW
YELLOW
YELLOW
YELLOW
CB CIRCUIT BREAKER
LS LIMIT SWITCH
FL FUSE LINK
RELAY2
RELAY1
CB CIRCUIT BREAKER
LS LIMIT SWITCH
KIT(10kW+5kW)
FL FUSE LINK
RED
BLACK
0
1
0
1
BLACK
WHITE W1
C
BLUE
WHITE
0
1
0
1
BLACK
WHITE W1
C
BLUE
BROWN BLACK
15kW HEAT
6
5
4
3
2
1
BLACK/WHITE
BLACK
WHITE
C
W2
BROWN
10kW HEAT KIT
7.5kW HEAT KIT
PCB
CN6
PCB
NOTE1: WHEN THE AHU MACHINE DOES NOT CONTAIN PCB BOARDS, SHORT LINES IN THE ACCESSORY BAG DOES NOT NEED.
RED
BLACK
WHITE W1
BLUE
RED
RED
BLUE
BLUE
RED
RED
BLUE
BLUE
YELLOW
YELLOW
HEATER KIT PLUG
5kW HEAT KIT
NOTE1
PCB
BROWN
20kW HEAT KIT/CB 60A
4
8
4
8
4
8
4
CB CIRCUIT BREAKER
LS LIMIT SWITCH
FL FUSE LINK
RELAY2
RELAY1
RELAY2
RELAY1
15kW HEAT KIT(7.5kW+7.5kW )/CB 50A
PCB
CN6
NOTE1
HEATER KIT PLUG
CN6
HEATER KIT PLUG
CN6
8
Multi-Position Air Handler-ECM
AMC**S1A - Instruction Manual
AMC**S1A - Instruction Manual
Multi-Position Air Handler-ECM
11. PISTON/TXV INSTALLATION
Table 11-3.Superheat Charging Chart
Charge the system by superheat when using a piston.
Reference the outdoor unit installation guide to charge
the system by subcooling when using a TXV.
This coil comes with a factory installed piston metering
device. See Table 11-1 for factory installed piston size.
Some system combinations will require a different sized
piston to be field installed.
Indoor Temperature (°F) Dry Bulb/wet Bulb
Outdoor
95/79 90/75 85/71 80/67 75/63 70/58
Temp (°F)
Superheat (°F)
A TXV may be required to achieve minimum efficiency
ratings or for long refrigerant line set applications.
Reference AHRI for system combination ratings.
115
110
105
100
95
90
85
80
75
70
65
60
55
Table 11-1. Factory installed piston size for each model.
Additional piston sizes are provided in the ship with
literature bag as necessary.
MODEL 50
24
52
56
58
X*
X
X
X
36
64
73
X
X*
75
X
60
80
83 90
X
X
X*
* means that this piston is pre-installed
WARNING
Failure to install the proper piston can lead to
poor system performance and possible
compressor damage.
Table 11-2 . Optional TXV kit part numbers. Some
combinations may require a TXV. See AHRI for system
combination ratings.
Outdoor Unit
Capacity (Tons)
R410a TXV Kit
1.5-3.0
TR6-3TONNB
3.5-4.0
TR6-4TONB
5.0
TR6-5TONB
19
23
24
26
27
29
30
32
34
35
37
38
40
41
16
17
19
21
23
25
26
28
30
32
34
36
37
7
9
11
13
14
18
20
22
24
26
29
31
34
6
6
6
7
9
12
15
17
19
21
24
27
30
5
5
5
6
6
7
9
11
13
16
19
22
26
5
5
5
5
5
5
6
6
7
10
13
17
21
Multi-Position Air Handler-ECM
AMC**S1A - Instruction Manual
TXV Replacement Information for AMC61S1A
NOTE:
1.The TXV replacement options noted in this sheet supersede those in the installation guide. Please
reference this sheet for all refrigerant metering options.
TXV-Replace Steps
Step 1: Remove the screws and front coil panel.
Step 2: Remove the rubber plugs from the liquid and vapor lines.
Step 3: Unwrap copper strap on sensing bulb and dismount the sensing bulb.
Step 4: Using a backup wrench to loose the nut of TXV.
Step 5: Take off TXV mounting clip ring.
Step 6: Use wet rag to protect pipe in coil, Al-Copper transition section (The black section of vapor line).
Step 7: Braze and take off two pipes from TXV. Be extra care not to overheat the pipes.
Step 8: Wrap the new TXV with a wet rag to prevent overheating. Connect and braze pipe to new TXV. While
brazing, use nitrogen flow and braze all connections.
Step 9: Replace a new sealing ring to the pipe joint, connect the TXV with pipe joint and tight the nut to 22
(±2) ft-lb.
Step 10: Allow tube to cool and pressurize line sets with 150 PSI of nitrogen to check braze connections for
leaks. Make repairs if needed.
Step 11: Use the supplied copper straps to secure the TXV sensing bulb on top of the vapor line as pictured.
Step 12: Use clip ring to hold TXV on mounting plate.
Step 13: Insulate the entire vapor line and sensing bulb. It is also recommended to insulate the TXV and liquid
line to prevent condensation in hot humid environments.
Step 14: Replace the front coil pance and secure in place.
Step 15: Follow the steps in the installation guide for vacuum requirements and system start up procedures.
Step 16: Allow system to run for an additional 10 minutes to verify the subcooling and superheat readings.
Al-COPPER TRANSITION
SECTION
VAPOR LINE
CONNECTION
EQUALIZATION PIPE
COPPER STRAPS
BULB
LIQUID LINE
CONNECTION
SENSOR T2
SLEEVE
TIGHTEN TORQUE
22 (±2) ft-lb
TXV
MOUNTING PLATE
20
SE SERIES LIMITED WARRANTY
Congratulations on purchasing your new HVAC equipment.
Your unit automatically qualifies for the warranty coverage listed below provided you meet the warranty conditions.
APPLIES TO MODELS: RSA*, RSH*, AMP*, WMP*, WMX*, GFM*, MAA*, RHP*, RGP*
YEAR 1 PRODUCT REPLACEMENT
If the heat exchanger, evaporator coil (packaged systems only), condenser coil, or compressor fails within the first year (365 days) after the date of
installation to the original consumer for the original installation, the original purchase cost of the unit will be reimbursed to the authorized Comfort-Aire/
Century distributor who has received prior authorization from Comfort-Aire/Century for the failure. The owner is responsible for additional labor, freight,
and miscellaneous charges. Units installed in a commercial application, defined as any application other than a residential/multifamily (personal, family
or household) purpose, are not eligible for the one year product replacement.
LIMITED FIVE (5) YEAR WARRANTY
All parts, the compressor, and the heat exchanger are warranted to be free from defects in workmanship and materials for normal residential use and
maintenance for five (5) years from the date of purchase by the original consumer for the original residential installation.
LIMITED EXTENDED WARRANTY
When registered with Comfort-Aire/Century, the heat exchanger is warranted to be free from defects in material and workmanship for twenty (20) years
and the compressor is warranted to be free from defects in material and workmanship for ten (10) years from the date of purchase by the original
consumer for the original installation.
DURATION OF WARRANTY
The warranty begins on the date of purchase by the original consumer (homeowner). The original consumer must retain a receipted bill of sale or invoice
showing model and serial number as proof of the warranty period initiation.
CONDITIONS FOR WARRANTY COVERAGE
Unit must be properly installed and maintained by a licensed HVAC service provider in accordance with the installation, operation, and maintenance
instructions provided with each unit. Unit cannot have been subjected to accident, alteration, improper repair, neglect/misuse, or force majeure. Proof of
proper maintenance over the lifetime of the unit must be supplied. Performance cannot be impaired by use of any product not authorized by Comfort-Aire/
Century, or by any adjustments or adaptations to components. Serial numbers and/or rating plate have not been altered or removed. Damage has not
been a result of inadequate wiring or voltage conditions, use during brown-out conditions, or circuit interruptions. Unit remains in the original residential
installation and is not transferrable. Unit was not purchased over the internet or at auction. Non-approved refrigerant and/or non-approved system additives
will void this warranty.
WARRANTY EXCEPTIONS
The Limited Express Warranty does not cover costs associated with normal maintenance, utility usage, labor, shipping and handling, or collateral damage.
It also does not cover any portion or component of the system that is not supplied by Comfort-Aire/Century, regardless of the cause of failure of such
portion or component.
LIMITATION OF LIABILITY
There are no other express or implied warranties. Comfort-Aire/Century makes no warranty of merchantability and does not warrant that the unit is suitable
for any particular purpose, building, room size, or condition except as specifically provided in this document. There are no other warranties, express
or implied, which extend beyond the description in this document. All warranties implied by law are limited in duration to the five-year term of the Parts
Warranty. Your exclusive remedy is limited to the replacement of defective parts. Comfort-Aire/Century will not be liable for any consequential or incidental
damages caused by any defect in this unit. This warranty gives you specific legal rights and you may also have other rights which vary from state to
state. Some states do not allow a limitation on how long an implied warranty lasts or do not allow the exclusion or limitation of incidental or consequential
damages, so the above limitations or exclusions may not apply to you. No warranties are made for units sold outside the continental United States and
Canada. Your distributor or final seller may provide a warranty on units sold outside these areas. Comfort-Aire/Century will not be liable for damages if our
performance regarding warranty resolution is delayed by events beyond our control including accident, alteration, abuse, war, government restrictions,
strikes, fire, flood, or force majeure.
Please register your new equipment to enjoy
an extended warranty.
For Comfort-Aire:
www.comfort-aire.com/wps/portal/product-registration
For Century:
www.century-hvac.com/wps/portal/product-registration
KEEP THIS INFORMATION AS A RECORD OF YOUR PURCHASE
Apply Serial Number and Model Number sticker here
(from product carton). if unavailable, write serial number and
model number below (can be found on unit rating plate).
Date of Purchase
o Component of new HVAC system
Date Installation Completed
o Replacement furnace only
Remember to retain your bill of sale as proof of warranty period and ownership.
SE_WARRANTY_2/2024
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