Century AMP60S1A-CY 60K MULTI-POSITION A/H PSC Installation, Operation & Maintenance Manual

INSTALLER’S GUIDE
SE Series UNITS
CONDENSING
High Efficiency Air Handlers
Multi-Position
Air Handler
1.5-5TonsAMP**S1A
R410a PSC Motor
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
AMP**S1A - Instruction Manual
Multi-Position Air Handler-PSC Motor
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 instruction 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-PSC Motor
AMP**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
10
7 REFRIGERANT CONNECTIONS
7.1 Condensate Drain Tubing
10
8 AIR FILTER (Not Factory-Installed)
11
9 FILTER INSTALLATION DIMENSIONS
12
10 WIRING DIAGRAM
13
11 PISTON/TXV INSTALLATION
16
AMP**S1A - Instruction Manual
Multi-Position Air Handler-PSC Motor
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 shutoff (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 on the following
websites: 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-PSC Motor
AMP**S1A - Instruction Manual
2 GENERAL
CAUTION
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.
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.
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.
Fig.1-1 CHECKING MOTOR STATUS
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
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.
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.
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).
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
AMP**S1A - Instruction Manual
Multi-Position Air Handler-PSC Motor
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
3
Multi-Position Air Handler-PSC Motor
AMP**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
46-1/2"[1180]
19-5/8"[500]
21-5/8"[550]
18"[456]
128 [58]
36
46-1/2"[1180]
19-5/8"[500]
21-5/8"[550]
18"[456]
128 [58]
48
54-1/2"[1385]
22"[560]
24"[610]
19-1/2"[496]
157 [71]
60
54-1/2"[1385]
22"[560]
24"[610]
19-1/2"[496]
161 [73]
Table 2-1
4
04
AMP**S1A - Instruction Manual
Multi-Position Air Handler-PSC Motor
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 the 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-PSC Motor
AMP**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”.)
REAR WATER CATCHER
STRAPS
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
THIS SYSTEM IS CHARGED WITH NITROGEN BEFORE SHIPMENT
48K,60K
36K,24K
STRAPS
Fig.3-3 INDOOR COIL AND DRAIN PAN SET-UP
6
AMP**S1A - Instruction Manual
Multi-Position Air Handler-PSC Motor
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 lefthand supply by removing the indoor coil and
reinstalling 180° from original position.
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-PSC Motor
AMP**S1A - Instruction Manual
4.4 Electrical Data
MODEL
VOLTAGE
HERTZ
HP
SPEEDS
CIRCUIT
AMPS.
MAXIMUM CIRCUIT
PROTECTOR
24
208/230
60
1/5
3
2.6
15(A)
36
208/230
60
1/3
3
3.2
15(A)
48
208/230
60
1/2
3
4.3
15(A)
60
208/230
60
3/4
3
4.4
15(A)
4.5 Heat Kit Data
Air
Handler
Model
Heater Kit
Model
Used
EHK-05A
24
EHK-08A
Electric
Heat (kW)
Min. Circuit
Ampacity
Max. Fuse or Breaker
(HACR) Ampacity
240V
208V
240V
208V
5
29
25.5
30
30
7.5
42
36.8
45
40
40
--
--
50
--
----
55
48.1
60
50
5
29.4
25.9
30
30
7.5
42.4
37.2
45
40
10
55.4
48.5
60
50
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
30.3
26.8
35
30
EHK-08A
7.5
43.3
38.1
45
10
56.3
49.4
60
36
48
EHK-10A
•
•
•
•
•
•
•
•
EHK-15B
15
56.3/26.1
49.4/22.6
60/30
50/25
--
EHK-20B
20
56.3/52.1
49.4/45.2
60/60
50/50
--
EHK-05A
5
31.8
28.3
35
30
EHK-08A
7.5
44.8
39.6
45
40
10
57.8
50.9
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
EHK-10A
Medium High
--
10
EHK-05A
EHK-10A
Low
•
•
•
•
•
•
•
•
EHK-10A
EHK-08A
Fan speed
(AC/HP)
•
•
••
•
--
•
•
••
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
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
24/36/48/60
2
EHK-08A
7.5kW Heat Strip
24/36/48/60
3
EHK-10A
10kW Heat Strip
24/36/48/60
4
EHK-15B
15kW Heat Strip, double Breaker panel
5
EHK-20B
20kW Heat Strip, double Breaker panel
8
36/48/60
3648/60
AMP**S1A - Instruction Manual
Multi-Position Air Handler-PSC Motor
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
Model
Number
Low
24
Medium
High
Low
36
Medium
High
Low
48
Medium
High
Low
60
CFM Wet Coil without filter and Electric Heat
Motor
Speed
Medium
High
External Static Pressure-Inches W.C.[kPa]
0[0]
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]
CFM
Watts
Current/A
CFM
Watts
Current/A
CFM
Power/W
Current/A
CFM
Watts
Current/A
CFM
Watts
Current/A
CFM
Power/W
Current/A
999
316
1.38
1176
342
1.49
1409
456
2.01
1028
362
1.64
1315
406
1.82
1532
524
2.39
953
310
1.36
1127
336
1.47
1359
446
1.96
985
353
1.62
1266
399
1.8
1478
513
2.36
905
306
1.34
1086
334
1.45
1306
438
1.93
930
345
1.6
1208
392
1.78
1421
502
2.34
847
302
1.32
1028
326
1.42
1253
429
1.9
859
335
1.57
1146
385
1.75
1347
491
2.31
757
288
1.28
944
315
1.38
1192
419
1.86
781
323
1.54
1065
372
1.72
1284
478
2.28
681
279
1.24
842
303
1.33
1108
404
1.8
712
313
1.51
981
361
1.69
1184
462
2.23
610
270
1.21
746
292
1.29
986
384
1.73
649
303
1.49
866
344
1.65
1082
446
2.2
543
256
1.16
668
281
1.25
870
368
1.67
571
290
1.45
775
331
1.62
932
423
2.14
411
240
1.1
569
266
1.19
743
348
1.61
468
276
1.42
686
320
1.59
805
407
2.11
CFM
Watts
Current/A
CFM
Watts
Current/A
CFM
Power/W
Current/A
CFM
Watts
Current/A
CFM
Watts
Current/A
CFM
Power/W
Current/A
1336
492
2.24
1654
550
2.4
1918
717
3.2
1726
678
2.95
1983
695
3.02
2138
793
3.45
1310
483
2.22
1610
537
2.38
1875
703
3.18
1693
658
2.87
1933
675
2.93
2086
773
3.7
1282
474
2.17
1569
526
2.35
1817
686
3.14
1655
639
2.78
1879
655
2.85
2024
751
3.27
1234
463
2.13
1510
512
2.32
1771
670
3.1
1637
619
2.69
1828
635
2.76
1952
726
3.17
1182
452
2.1
1461
503
2.3
1715
652
3.04
1584
602
2.62
1760
615
2.67
1873
702
3.06
1140
443
1.93
1394
489
2.18
1651
635
3
1500
576
2.52
1685
596
2.59
1797
679
2.97
1049
422
2.03
1350
475
2.16
1584
617
2.9
1421
553
2.42
1597
574
2.5
1722
658
2.88
925
393
1.9
1265
458
2.08
1511
600
2.87
1328
526
2.31
1507
550
2.4
1646
638
2.79
833
374
1.87
1034
416
2.04
1395
570
2.85
1217
495
2.18
1403
522
2.28
1516
604
2.65
--- 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.
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.
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).
9
Multi-Position Air Handler-PSC Motor
AMP**S1A - Instruction Manual
6. DUCTWORK
7. REFRIGERANT CONNECTIONS
Field ductwork must comply with the National Fire
Protection Association NFPA 90A, NFPA 90B and any
applicable local ordinance.
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
Piston 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
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
Use a wet rag to protect the two seal rings in the
input pipe from being damaged by torch flames
while brazing.
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.
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.
Do not leave a gap
Vapor piping
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” are accounted
for in the system.
Air
handler
Supply plenum is attached to the 3/4” duct flanges
supplied with the unit. Attach flanges around the
blower outlet.
Piping heat insulation
material
Liquid piping
Do not leave a gap
Fig.7-1 PIPING CONNECTIONS
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.
10
AMP**S1A - Instruction Manual
Multi-Position Air Handler-PSC Motor
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
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
Be sure to insulate the drain piping and drain
socket since condensation may cause water
leakage.
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 recommended for the type of
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, 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.
11
Multi-Position Air Handler-PSC Motor
AMP**S1A - Instruction Manual
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
FILTER SIZE
IN [mm]
"W" IN [mm]
"D" IN [mm]
"H" IN [mm]
Return width
"A" IN
Return length
MODEL "B" IN
24/36
18Χ20[457Χ508]
18.3[466]
21.6[548]
1[25.4]
20.8
16.3
48/60
20Χ22[508Χ559]
20.7[526]
23.9[608]
1[25.4]
23
18.8
MODEL
AIR FILTER REMOVAL
1. Remove bolts manually, remove air filter recover. 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
12
AMP**S1A - Instruction Manual
Multi-Position Air Handler-PSC Motor
10. WIRING DIAGRAM
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
13
Y
BLUE
YELLOW
BLACK
RED
WHITE
BLACK
RED
G Fan
GREEN
Y1 Comp
BLACK/WHITE
24RC
W
Multi-Position Air Handler-PSC Motor
AMP**S1A - Instruction Manual
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.
FOR OPTIONAL
ELECTRIC HEAT
L1
L2
CN3
CN6
CN8
M1
M2
LINE VOLTAGE
FACTORY STANDARD
FIELD INSTALLED
FACTORY OPTIONAL
LOW VOLTAGE
FACTORY STANDARD
FIELD INSTALLED
FACTORY OPTIONAL
USE COPPER CONDUCTORS ONLY
WARNING CABINET MUST BE PERMANMENTLY
GOUNDED AND ALL WIRING TO CONFORM TO
I.E.C,N.E.C,C.E.C,C.L.C,AND LOCAL CODES AS
APPLICABLEREPLACEMENT WIRE MUST BE
THE SAME GAUGE AND INSULATION TYPE AS
ORIGINAL WIRE
~
CN4 CN7
CN11
FAN
CN1
FAN
MOTOR
CAPACITANCE
TO THERMOSTAT
FOR SINGLE AUXILARY HEAT MODE
CONNECT W1 OR CONNECT W1 WITH W2
Fig.10-3 INDOOR UNIT WIRING DIAGRAM FOR PSC MOTOR SYSTEMS
Note: Description of fan speed switch with PSC motor
1. Default as medium speed of factory settings.
2. High speed wiring: Switch to high speed (black wire) and connect with FAN terminal, while medium speed (red wire) connect
with M2 terminal.
3. Low speed wiring: Switch to low speed (blue wire) and connect with FAN terminal, while medium speed (red wire) connect
with M1 terminal.
4.For the 36K model , in order to make the AHRI 14.3 SEER2 system rating the fan speed must be changed from
Medium to High.
Terminal
Fan speed
Fan
M1
M2
Medium
Red
Blue
Black
High
Black
Blue
Red
Low
Blue
Red
Black
14
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
15
6
5
4
3
2
1
C
HEATER KIT PLUG
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
2
4
8
RED
BLACK
YELLOW
BLUE
CB CIRCUIT BREAKER
LS LIMIT SWITCH
FL FUSE LINK
RELAY1
6
LS
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
FL
FL
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
Fig.10-4 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
LS ELEMENTS
LS ELEMENTS
YELLOW
YELLOW
HEATER KIT PLUG
5kW HEAT KIT
NOTE1
PCB
6
5
4
3
2
1
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
AMP**S1A - Instruction Manual
Multi-Position Air Handler-PSC Motor
Multi-Position Air Handler-PSC Motor
AMP**S1A - Instruction Manual
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
Reference Table 11-3 to charge the system by
superheat when using a piston. Reference the
outdoor unit installation guide to change the system
by subcooling when using a TXV.
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 52 56 58 60 64 68 70 73 75 80 83 90
24
X*
36
X
X X*
48
X
X*
60
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
16
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
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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