AMRTA 507296-03 Residential Packaged Units Air Conditioners and Heat Pumps Instruction Manual
- June 6, 2024
- AMRTA
Table of Contents
507296-03 Residential Packaged Units Air Conditioners and Heat Pumps
INSTALLATION AND MAINTENANCE INSTRUCTIONS
RP14AC AND RP14HP SERIES UNITS
RESIDENTIAL PACKAGED UNITS
Air Conditioners and Heat Pumps 507296-03 12/2020
THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE
WARNING
Installation and servicing of air conditioning equipment can be hazardous due
to internal refrigerant pressure and live electrical components. Only trained
and qualified service personnel should install or service this equipment.
Installation and service performed by unqualified persons can result in
property damage, personal injury, or death.
Table of Contents
Unit Dimensions ………………………………………………….2 Roof Curb Dimensions …………………………………………4
Adjustable Roof Curb Dimensions………………………….6 Installation
………………………………………………………….8 Electrical Wiring…………………………………………………10 Duct System
…………………………………………………….. 11 Filters ………………………………………………………………. 11 Condensate
Drain………………………………………………12 Sequence of Operation……………………………………….12 Maintenance
……………………………………………………..15 Wiring Diagrams ………………………………………………..18
WARNING
For your safety, do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance. Such actions could
result in property damage, personal injury, or death.
WARNING
If this unit is to be installed in a mobile or manufactured home application,
the duct system must be sized to achieve static pressures within the
manufacturer’s guidelines. All other installation guidelines must also be
followed. Failure to do so may result in equipment damage, personal injury,
and improper performance of the unit.
215 Metropolitan Drive West Columbia, SC 29170
P507296-03
(P) 507296-03
CAUTION
The installation of this appliance must conform to the requirements of the
National Fire Protection Association; the National Electrical Code, ANSI/NFPA
No. 70 (latest edition) in the United States; the Canadian Electrical Code
Part 1, CSA 22.1 (latest edition) in Canada; and any state or provincial laws
or local ordinances. Local authorities having jurisdiction should be consulted
before installation is made. Such applicable regulations or requirements take
precedence over the general instructions in this manual.
507296-03
Save these instructions for future reference
Issue 2107
Page 1 of 19
Unit Dimensions – Small Base Air Conditioners & Heat Pumps
47.66
2.48
1.98
2.33
2.33
16.77
14.02
TOP VIEW
11.49
RETURN AIR
SUPPLY AIR
11.49
18.52 16.07
47.66 SIDE VIEWS
POWER ENTRY POWER ENTRY
3.25
20.31 21.06 23.19
6.94 4.56
13.44
13.44
14.32
6.20 3.07
Page 2 of 19
5.86
40.89
CONDENSATE DRAIN 3/4 NPT
21.63
13.21
TYPICAL DRAIN LOCATION
3.87 3.62
17.07
34.19 29.59
12.12 6.20
Issue 2107
POWER ENTRY 1-1/8 DIA. KNOCKOUT
LOW VOLTAGE ENTRY 7/8 DIA. KNOCKOUT
ELECTRIC HEAT POWER ENTRY
4.06
507296-03
Unit Dimensions – Large Base Air Conditioners & Heat Pumps
56.13
2.33
2.11
2.39
19.49
19.49
TOP VIEW
11.49
RETURN AIR
SUPPLY AIR
2.33
11.49
18.52 16.07
47.66 SIDE VIEWS
POWER ENTRY POWER ENTRY
6.94 3.25
10.06 25.81 26.56 28.68
18.19
18.19
14.32
6.20 507296-03
3.76
4.20
44.89
CONDENSATE DRAIN 3/4 NPT
21.63
13.21
TYPICAL DRAIN LOCATION
3.87
17.07
3.62 4.06 33.59 38.19
12.14
6.20
Issue 2107
POWER ENTRY 1-1/8 DIA. KNOCKOUT LOW VOLTAGE ENTRY 7/8 DIA. KNOCKOUT
ELECTRIC HEAT POWER ENTRY
Page 3 of 19
Roof Curb Dimensions – Small Base Air Conditioners & Heat Pumps
3/4 (19)
Opening for Power Entry Through Unit Base
RETURN OPENING
5-1/2 x 5-5/8 in.
(140 x 31 mm)
44-3/8 (1127)
11-1/2
16-7/8 (429)
2-1/8
Insulated
(287)
(54)
Panels
5-3/4
1
(146) (25)
5-1/2
(140)
SUPPLY OPENING
13-7/8 (352)
8 (203) 14 (356)
17-1/4
11-1/2 18 (457)
(438)
(287) 24 (610)
3
44-3/8 (1127)
(76)
1-3/8
13 (35)
(330)
Opening for Power Entry Through Unit Base 3 x 13 in. (76 x 330 mm)
3-3/4 (95)
NOTE – Roof deck may be omitted within confines of curb.
Page 4 of 19
Issue 2107
507296-03
Roof Curb Dimensions – Large Base Air Conditioners & Heat Pumps
Opening for Power Entry Through Unit Base 5-1/2 x 5-5/8 in. (140 x 31 mm)
44-3/8 (1127)
Insulated Panels
3/4 (19)
19-1/2
11-1/2
(380)
1
(287) (25)
RETURN OPENING
2-1/8 (54)
19-1/2
(380)
SUPPLY
OPENING 11-1/2
22-7/8
(287)
(581)
52-7/8 (1343)
Opening for Power Entry Through Unit Base 3 x 13 in. (76 x 330 mm)
3-3/4 (95)
7 (178)
8 (203) 14 (356) 18 (457) 24 (610)
NOTE – Roof deck may be omitted within confines of curb.
507296-03
Issue 2107
Page 5 of 19
Adjustable Roof Curb Dimensions – Small Base Air Conditioners & Heat Pumps
CLIPLOCK CORNER DETAIL
Top Edge Wood Nailer Strip
CURB PROFILE
1 1/2
1-3/4 Opening for Power Line Entry thru base
44-3/8 Insulated Panels
44-3/8
Bottom Flange
Typical Slot Typical Locking Tab
NOTE: See Cliplock 1000 installation instructions for complete assembly and
installation procedures and requirements.
1
11-5/8
16-7/8
1
5-3/4
5-1/2
3-1/2
13-1/2
17-1/4
3-5/8
1-3/8
2-1/8 13-7/8
14 11-5/8
Page 6 of 19
Bottom Curb Assembly
Opening for Power Entry thru base
NOTE – Roof deck may be omitted within confines of curb.
Issue 2107
507296-03
Adjustable Roof Curb Dimensions – Large Base Air Conditioners & Heat Pumps
CLIPLOCK CORNER DETAIL
Top Edge Wood Nailer Strip
CURB PROFILE
1 1/2
1-3/4 Opening for Power Line Entry thru base
44-3/8 Insulated Panels
52-7/8
Bottom Flange
Typical Slot Typical Locking Tab
NOTE: See Cliplock 1000 installation instructions for complete assembly and
installation procedures and requirements.
1
11-5/8
19-5/8
5-1/2
1 5-3/4
23-1/8
3-1/2
13-1/2
3-1/2
6-7/8
2-1/8 19-3/8
11-5/8 14
Bottom Curb Assembly
Opening for Power Entry thru base
507296-03
NOTE – Roof deck may be omitted within confines of curb. Issue 2107
Page 7 of 19
WARNING
Improper installation, adjustment, alteration, service, or maintenance can
cause injury or property damage. Refer to this manual. For assistance or
additional information, consult a qualified installer or service agency.
Installation
These instructions explain the recommended method of installation of the
packaged heat pump and air conditioner units and associated electrical wiring.
This unit is designed and approved for use as a selfcontained air-to-air
outdoor heat pump and air conditioner system.
The units are factory-equipped with a transformer and blower control for
applications without auxiliary heat. Electric heat accessory kits (PHK-) can
be ordered for field installation of additional heat where required.
These instructions, and any instructions packaged with mating components
and/or accessories, should be carefully read prior to beginning installation.
Note particularly any CAUTIONS or WARNINGS in these instructions and all
labels on the units.
These instructions are intended as a general guide only, for use by qualified
personnel and do not supersede any national or local codes in any way.
Compliance with all local, state, provincial, or national codes pertaining to
this type of equipment should be determined prior to installation.
Inspection of Shipment Upon receipt of equipment, carefully inspect it for
possible shipping damage. If damage is found, it should be noted on the
carrier’s freight bill. Take special care to examine the unit inside the
carton if the carton is damaged. File a claim with the transportation company.
If any damages are discovered and reported to the carrier, DO NOT INSTALL THE
UNIT, as claim may be denied.
Check the unit rating plate to confirm specifications are as ordered.
Limitations The unit should be installed in accordance with all national and
local safety codes.
Limitations of the unit and appropriate accessories must also be observed.
The unit must not be installed with any ductwork in the outdoor air stream.
The outdoor fan is not designed to operate against any additional static
pressure.
Location The unit is designed to be located outdoors with sufficient clearance
for free entrance to the air inlet and discharge air openings. The location
must also allow for adequate service access.
The unit must be installed on a solid foundation that will not settle or
shift. Adequate structural support must be provided. Install the unit in level
position. Isolate the base from the building structure to avoid possible
transmission of sound or vibration into the conditioned space.
The heat pump unit foundation should be raised to a minimum of 3″ above finish
grade. In areas that have prolonged periods of temperature below freezing and
snowfall, the heat pump unit should be elevated above the average snow line.
Extra precaution should be taken to allow free drainage of condensate from
defrost cycles to prevent ice accumulation. The unit should not be located
near walkways to prevent possible icing of surface from defrost condensate.
Avoid placing the unit near quiet areas, such as sleeping quarters or study
rooms. Normal operating sound levels may be objectionable if the unit is
placed near certain rooms.
For improved start-up performance, the condenser coil should be washed with
suitable detergent to remove any residue from manufacturing processes.
Use of Unit During Construction Use of this unit as a construction heater or
air conditioner is not recommended during any phase of construction. Very low
return air temperatures, harmful vapors and operation of the unit with clogged
or misplaced filters will damage the unit.
If this unit has been used for heating or cooling of buildings or structures
under construction, the following conditions must be met or the warranty will
be void:
· A room thermostat must control the unit. The use of fixed jumpers that will
provide continuous heating or cooling is not allowed.
· A pre-filter must be installed at the entry to the return air duct.
· The return air duct must be provided and sealed to the unit.
· Return air temperature range between 55°F (13°C) and 80°F (27°C) must be
maintained.
· Air filters must be replaced and pre-filters must be removed upon
construction completion.
· The input rate and temperature rise must be set per the unit rating plate.
· The heat exchanger, components, duct system, air filters and evaporator coil
must be thoroughly cleaned following final construction clean-up.
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507296-03
· The unit operating conditions (including airflow, cooling operation,
ignition, input rate, temperature
rise and venting) must be verified according to these installation
instructions.
Clearances All units require certain clearances for proper operation and
service. Refer to Table 1 for the minimum clearances to combustibles required
for construction, servicing, and proper unit operation.
In the U.S., units may be installed on combustible floors made from wood or
class A, B, or C roof covering material.
In Canada, units may be installed on combustible floors. Units must be
installed outdoors.
Do not permit overhanging structures or shrubs to obstruct condenser air
discharge outlet.
Front of unit
Clearance to Combustibles
0 in.
Clearance for Service Access
24 in.
Back of unit
0 in.
Left side
0 in.
Right side
0 in.
0 in. 24 in. 24 in.
Base of unit
0 in.
0 in.
Top of unit
0 in.
48 in.
For any future service, installer must provide access to screws of top and rear panels.
Table 1. Minimum Clearances
Compressor Units are shipped with compressor mountings factory adjusted and
ready for operation. Do not loosen compressor mounting bolts.
Roof Curb Installation If a roof curb is used, follow the manufacturer’s
installation instructions and be sure that all required clearances are
observed (see Clearances section).
Prior to setting the unit on the roof curb, the shipping bracket located
underneath the unit must be removed. Remove the two screws in the base rail
(located on the front and rear sides of the unit). The four screws and the
bracket can be discarded. See Figure 1.
Rigging Unit Exercise care when moving the unit. Do not remove any packaging
until the unit is near the place of installation.
1. Connect rigging to the unit base rails using both holes in each corner.
2. All panels must be in place for rigging. 3. Place field-provided spreaders
in place. Spreaders
must be of adequate strength and length (must exceed unit dimension by 6
inches).
Units may also be moved or lifted with a forklift. The lengths of the forks of
the forklift must be a minimum of 42 inches.
Field-Provided Lifting Spreaders Recommended
507296-03
Shipping Bracket and Mounting Screws Must be Removed for Rooftop or Downflow
Application
Figure 1.
Issue 2107
Page 9 of 19
CAUTION
Before lifting a unit, make sure that the weight is distributed equally on the
cables so that it will lift evenly.
High Voltage Power Entry Thermostat Wire Entry
Gas Entry
Figure 2.
Unpacking Locate the four stacking brackets at each corner of the top panel.
Remove the screws and washers that secure these brackets. All screws must be
re-installed. The washers and stacking brackets can be discarded. Remove the
bag and remaining packaging material, which can be discarded. Locate the four
plastic fork slot bumpers on the base rails. Remove the fasteners and bumpers
and discard.
CAUTION
As with any mechanical equipment, personal injury can result from contact with
sharp sheet metal edges. Be careful when you handle this equipment.
Service Access Access to all serviceable components is provided by four
removable panels: upper access panel (for blower, ID coil, and optional
filter), auxiliary heat access, control access panel, and compressor access.
Electrical Wiring
All field wiring must be done in accordance with National Electrical Code
recommendations, local codes, and applicable requirements of UL Standards, or
in accordance with Canadian Electrical Code recommendations, local codes, or
CSA Standards. Power wiring, disconnect means, and over-current protection are
to be supplied by the installer. Refer to the unit rating plate for maximum
over-current protection and minimum circuit ampacity, as well as operating
voltage. The power supply must be sized and protected according to
specifications supplied.
The unit must be grounded with a separate ground conductor. See Figure 4 for
typical field wiring connection. The wiring diagram can be found on the unit
inside the access panel. Low voltage control wiring are terminal strip or
pigtail leads located on the main control box and are color-coded to match the
connection called out on the wiring schematic.
NOTE: An optional bottom-entry power kit is available for these units. See the
kit instructions for proper installation details.
CAUTION
When connecting electrical power and control wiring to the unit, waterproof-
type connectors must be used so that water or moisture cannot be drawn into
the unit during normal operation.
Units are factory wired for a 230-volt power supply. If power supply is 208
volts, it will be necessary to change a wire connection on the unit
transformer from 240V terminal to 208V terminal as shown on the wiring
diagram.
Use only copper conductors.
If any of the original unit wiring is replaced, the same size and type wire
must be used.
Contactor
Ground Lug
Field-Supplied Fused or Circuit Breaker Disconnect
Single Phase Power Supply
WARNING
This unit is charged with HFC-410A refrigerant. Operating pressures for units
charged with HFC-410A are higher than pressures in units charged with HCFC22.
All service equipment MUST be rated for use with HFC-410A refrigerant.
If 208 Volt is supplied, transformer connection must be changed
Figure 3. 208/230 Line Voltage Wiring
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507296-03
! CAUTION Do not connect C connections except when required by the indoor
thermostat. Refer to the
thermostat installation instructions.
Thermostat The room thermostat should be located on an inside wall where it will not be subject to drafts, sun exposure, or heat from electrical fixtures or appliances. Follow the manufacturer’s instructions enclosed with the thermostat for general installation procedure. Color-coded insulated wires (#18 AWG) should be used to connect the thermostat to the unit. A minimum of five wires are required for proper installation.
THERMOSTAT R C Y1 O W G
OUTDOOR UNIT R Red C Blue Y1 Yellow
- O Orange
W White G Green
*”O” connection used only on heat pump models SINGLE PHASE
L2
L1
GROUND
SCREW
The supply and return air duct systems should be designed for the CFM and
static requirements of the job. They should not be sized to match the
dimensions of the duct connections on the unit.
The unit is shipped ready for horizontal flow (side duct connections) or
downflow (bottom duct connections). All units are equipped with a drain pan
overflow switch that is installed and wired at the factory. Duct attachment
screws are intended to go into the duct panel flanges. Duct to unit
connections must be sealed and weather proofed.
For horizontal duct systems:
1. Remove the duct covers on side of the unit. They can be discarded.
2. Install the duct system to the unit.
For downflow duct systems:
1. Remove the duct covers on side of the unit. Keep the screws and the covers
as they will be re-installed later.
2. Remove the downflow duct covers located inside unit. Remove the four
screws securing each cover. Remove the covers from the unit. They can be
discarded.
3. Remove screws located between the supply and return air openings that
attach the blower deck to the base pan. These screws can interfere with bottom
duct connections or roof curb seals. Discard these screws.
4. Install the duct system to the unit.
5. Re-install the duct covers removed in Step 1.
POWER WIRING 208/230-1-60
(75° MIN. WIRE) POWER WIRING 24V CONTROL WIRING
(NEC CLASS 2)
W1, W2 can be used to stage electric heat accessory on 10, 15 & 20 kW models.
5 And 7 kW heater accessory function off W1 only.
Figure 4. Typical Wiring Connections
Duct System
The duct system should be designed and sized according to the methods in the
Air Conditioning Contractors of America (ACCA) manual that is most appropriate
to the installation application.
A closed return duct system shall be used. This shall not preclude use of
economizers or outdoor fresh air intake. It is recommended that supply and
return duct connections at the unit be made with flexible joints.
Filters
Air filters are not supplied with the unit. A field-provided air filter must
always be installed ahead of the evaporator coil and must be kept clean or
replaced. Dirty filters will reduce the airflow of the unit.
An optional filter rack kit may be purchased separately for installation
inside the unit’s coil compartment. Air filter sizes are shown in Table 2 for
use with filter rack kit.
NOTE:
The filter rack must be installed prior to installation of the unit in
applications where access to the rear panel is limited.
Unit Model 24,30,36 42,48,60
Filter 1 14 x 20 x 1 20 x 20 x 1
Filter 2 20 x 20 x 1
Table 2. Unit Air Filter Sizes – inches
507296-03
Issue 2107
Page 11 of 19
Condensate Drain
This package unit is equipped with a 3/4″ FPT coupling for condensate line
connection. Plumbing must conform to local codes. Use a sealing compound on
male pipe threads.
Do not operate unit without a drain trap. The condensate drain is on the
negative pressure side of the blower; therefore, air being pulled through the
condensate line will prevent positive drainage without a proper trap.
The condensate drain line must be properly trapped, routed to a suitable drain
and primed prior to unit commissioning.
NOTE: Install drain lines and trap so they do not block service access to the
unit.
See Figure 5 for proper drain arrangement. The drain line must pitch to an
open drain or pump to prevent clogging of the line. Seal around the drain
connection with suitable material to prevent air leakage into the return air
system.
To prime trap, pour several quarts of water into drain, enough to fill drain
trap and line.
CAUTION
Drain lines should be hand-tightened only. Do not use tools to tighten fitting
into drain.
Minimum Pitch:
1 in (25) Per 10″
(3048 mm) of
Unit
Line
Open Vent
Crankcase Heater (if used) Some models may be equipped with a crankcase heater
to prevent excessive migration of liquid refrigerant into the compressor
during off cycles. Power must be maintained to the unit to keep this feature
active.
Except as required for safety while servicing, do not open the system
disconnect switch.
Heater Kit Accessory (if used) The unit is fully equipped for cooling
operation without auxiliary heat. A heater kit accessory may also be used. To
install the heater kit accessory (see Figure 7):
1. Disconnect the power and open the main control access.
2. Disconnect the plug separating the high voltage wire harness. Remove the
high voltage wire harness plug and discard.
3. Remove the heater blockoff by removing the four screws holding it in
place.
4. Insert the heater into the control panel and fasten in the same mounting
holes.
5. Plug the heater wiring harness into the wire harness on the control
assembly. Field wiring of the auxiliary heater is separate from the unit power
supply. Wire the power supply wiring for the heater to the appropriate
connections on the heater kit.
Sequence of Operation
Cooling When the thermostat is in the cooling mode, the O circuit is powered,
which energizes the reversing valve. Upon cooling demand, the thermostat
closes circuit R and Y. Closing R and Y closes the unit contactor, starting
the compressor and outdoor fan. The thermostat automatically closes the R to G
circuit, which brings on the indoor blower at the same time. Upon satisfying
cooling demand, the thermostat will open the above circuits and open the main
contactor, stopping the compressor and outdoor fan. If the unit is equipped
with a delay timer, the blower will continue to operate for 60 to 90 seconds,
which improves system efficiency.
Mounting Frame
Trap must be deep enough to offset maximum static difference (generally, 3
inches (76 mm) minimum). In addition, the drain line must be supported if
longer than 10 feet.
Trap must be primed at start-up.
Figure 5. Typical Condensate Drain Connection
Heating – Heat Pump Stage Upon heating demand, the thermostat closes circuit R
to Y, which closes the unit contactor, starting the compressor and outdoor
fan. The reversing valve is not energized in the heating mode. The thermostat
again automatically brings on the indoor fan at the same time. Upon satisfying
heating demand, the thermostat opens above circuits and stops unit operation.
Heating – Auxiliary Electric Heat Upon heating demand for auxiliary electric
heat, the thermostat closes circuit R to W, which energizes the
Page 12 of 19
Issue 2107
507296-03
heater sequencers as well as the indoor blower. Upon satisfying auxiliary heat
demand, the thermostat opens above circuits and heating elements sequence off;
blower continues to operate until all heating elements have turned off.
Defrost System The defrost system includes two components: the defrost
thermostat and the defrost control.
Defrost Thermostat
The defrost thermostat is located on the evaporator coil. When the defrost
thermostat senses 35°F or cooler, the thermostat contacts close and send a
signal to the defrost control board to start the defrost timing. It also
terminates defrost when the liquid line warms up to 60°F.
Defrost Control
The defrost control board includes the combined functions of time/temperature
defrost control, defrost relay, diagnostic LEDs and terminal strip for field
wiring connections (see Figure 6).
The control provides automatic switching from normal heating operation to
defrost mode and back. During the compressor cycle (call for defrost), the
control accumulates compressor run time at 30, 60, 90 minute field-adjustable
intervals. If the defrost thermostat is closed when the selected compressor
run time interval ends, the defrost relay is energized and the defrost begins.
DEFROST TIMING PINS (P1)
TEST PINS
COMPRESSOR DELAY PINS REVERSING VALVE
S87
LOW PRESSURE SWITCH
DEFROST THERMOSTAT (S6)
S4
HIGH PRESSURE SWITCH
DIAGNOSTIC LEDS
24V TERMINAL STRIP CONNECTIONS
SERVICE LIGHT CONNECTIONS
Figure 6. Defrost Control Board
1. An on-board outdoor ambient temperature sensor on the defrost control
bypasses the low pressure switch during low ambient temperature below 15°F in
heating mode to eliminate nuisance low pressure trips.
NOTE: 15°F is an approximate temperature, depending upon model and
installation location.
2. A defrost cycle will initiate when there has been a low pressure switch
trip; the defrost sensor must be closed and the defrost time interval must not
have expired.
507296-03
Figure 7. Heater Kit Accessory Installation
Issue 2107
Page 13 of 19
3. At the end of the defrost cycle, when the unit goes back to heating mode,
the low pressure switch is checked to see if it has reset. If so, the
strikeout is not counted. This prevents lockout during extreme winter
conditions.
Defrost Control Timing Pins
Each timing pin selection provides a different accumulated compressor run time
period during one thermostat run cycle. This time period must occur before a
defrost cycle is initiated. The defrost interval can be adjusted to 30 (T1),
60 (T2), or 90 (T3) minutes. It is intended that this product should be set at
the 60-minute time interval at initial installation. If the timing selector
jumper is not in place, the control defaults to a 90-minute defrost interval.
The maximum defrost period is 14 minutes and cannot be adjusted.
NOTE:
For geographic areas that experience low temperature and high humidity
conditions (below 35°F and above 80% RH), the defrost timer pin must be field
set at installation to a 60 or 30 minute defrost interval to ensure reliable
system operation while in heating mode.
A test option is provided for troubleshooting. The test mode may be started
any time the unit is in the heating mode and the defrost thermostat is closed
or jumpered. If the jumper is in the TEST position at power up, the control
will ignore the test pins. When the jumper is placed across the TEST pins for
2 seconds, the control will enter the defrost mode. If the jumper is removed
before an additional 5-second period has elapsed (7 seconds total), the unit
will remain in defrost mode until the defrost thermostat opens or 14 minutes
have passed. If the jumper is not removed until after the additional 5-second
period has elapsed, the defrost will terminate and the test option will not
function again until the jumper is removed and reapplied.
Compressor Delay (Quiet Shift) The defrost board has a field-selectable
function to reduce occasional sounds that may occur while the unit is cycling
in and out of the defrost mode. The compressor will be cycled off for 30
seconds going in and out of the defrost mode when the compressor delay jumper
is removed.
NOTE: The 30-second “off” cycle is not functional when jumpering the TEST
pins.
Time Delay The defrost control includes a compressor timer, which ensures the
compressor is off for a minimum amount of time between operating cycles.
The timed-off delay is 5 minutes long. The delay helps to protect the
compressor from short cycling in case the power to the unit is interrupted or
a pressure switch opens.
The delay is bypassed by placing the timer select jumper across the TEST pins for 0.5 seconds.
Pressure Switch Circuit High and low pressure switches are connected to the
defrost control board on heat pump models. Air conditioning models have a high
pressure switch installed in line with compressor contactor coil (see Figure
6).
During a single demand cycle, the defrost control will lock out the unit after
the fifth time that the circuit is interrupted by any pressure switch wired to
the control board. In addition, the diagnostic LEDs will indicate a locked-out
pressure switch after the fifth occurrence of an open pressure switch (see
Table 3).
The unit will remain locked out until power to the board is interrupted, then
re-established, or until the jumper is applied to the TEST pins for 0.5
seconds.
NOTE: The defrost control board ignores input from the low pressure switch
terminals as follows:
· During the TEST mode
· During the defrost cycle
· During the 90-second start-up period
· For the first 90 seconds each time the reversing valve switches heat/cool
modes
If the TEST pins are jumpered and the 5-minute delay is being bypassed, the LO
PS terminal signal is not ignored during the 90-second start-up period.
Diagnostic LEDs The defrost board uses two LEDs for diagnostics. The LEDs flash a specific sequence according to the condition as shown in Table 3.
Defrost Board Diagnostic LEDs
Green LED (DS2)
Red LED (DS1)
Condition
OFF
OFF
No Power to Control
Simultaneous slow FLASH
Normal Operation / Power to Control
Alternating Slow FLASH 5-min Anti-Short-Cycle Delay
ON
Slow FLASH
Low Pressure Switch Ignored (Low Ambient)
Fault & Lockout Codes
OFF
Slow FLASH Low Pressure Switch Fault
OFF
ON
Low Pressure Switch Lockout
Slow FLASH
OFF
High Pressure Switch Fault
ON
OFF
High Pressure Switch Lockout
Table 3. Defrost Control (CMC1) Diagnostic LEDs
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Issue 2107
507296-03
System Performance This equipment is a self-contained, factory optimized refrigerant system, and should not require adjustments to system charge when properly installed. If unit performance is questioned, perform the following checks.
Ensure unit is installed per manufacturer’s instructions and that line voltage and air flow is correct. Refer to the following tables for proper performance value. The indoor metering device varies by model; when checking performance of a unit using an orifice for metering, refer to the suction superheat value to judge performance. When checking performance of a unit that uses an expansion valve for metering, refer to the subcooling value to judge system performance.
If the measured performance value varies from table value allowance, check internal seals, service panels and duct work for air leaks, as well as restrictions and blower speed settings. If unit performance remains questionable, remove system charge, evacuate to 500 microns, and weigh in refrigerant to nameplate charge. It is critical that the exact charge is re- installed. Failure to comply will compromise system performance.
If unit performance is still questionable, check for refrigerant related problems, such as blocked coil or circuits, malfunctioning metering device or other system components.
Model
Suction
Liquid
Superheat +/- 3° Subcooling +/- 2°
2 Ton
13
2.5 Ton
16
3 Ton
14
3.5 Ton
14
4 Ton
16
5 Ton
17
Based on outdoor ambient temperature of 82°F, and indoor entering air of 80°F db, 67°F wb.
Table 4. Air Conditioner Unit Cooling System Performance Values
Model
Suction
Liquid Subcooling
Superheat +/- 3°
+/- 2°
2 Ton
18
2.5 Ton
16
3 Ton
16
3.5 Ton
22
4 Ton
22
5 Ton
5
Based on outdoor ambient temperature of 82°F, and indoor entering air of 80°F db, 67°F wb.
Table 5. Heat Pump Cooling System Performance Values
Model
Liquid Subcooling +/- 2°
2 Ton
25
2.5 Ton
15
3 Ton
28
3.5 Ton
20
4 Ton
35
5 Ton
28
Based on outdoor ambient temperature of 47°F, and indoor entering air of 70°F db.
Table 6. Heat Pump Heating System Performance Values
Maintenance
WARNING
Before performing maintenance operations on the system, shut off all
electrical power to the unit. Turn off accessory heater power switch if
applicable. Electrical shock could cause personal injury or death.
Periodic inspection and maintenance normally consists of changing or cleaning
the filters and cleaning the evaporator coil. On occasion, other components
may also require cleaning.
Filters Filters are not supplied with the unit. Inspect once a month. Replace
disposable or clean permanent type as necessary. Do not replace permanent type
with disposable.
Motors Indoor and outdoor fan and vent motors are permanently lubricated and
require no maintenance.
Indoor fans are equipped with a permanent magnet constant torque motor. These
motors remain energized and are controlled by 24V signals. For high static
applications, use Tap 3 for cooling speed and Tap 5 for heating speed.
Evaporator Coil Dirt and debris should not be allowed to accumulate on the
evaporator coil surface or other parts in the air circuit. Cleaning should be
as often as necessary to keep coil clean. Use a brush, vacuum cleaner
attachment, or other suitable means. If water is used to clean the coil, be
sure the power to unit is shut off prior to cleaning. Care should be used when
cleaning the coil so that the coil fins are not damaged.
Do not permit the hot condenser air discharge to be obstructed by overhanging
structures or shrubs.
507296-03
Issue 2107
Page 15 of 19
Condenser Coil Clean condenser coil annually with water and inspect monthly
during the cooling season.
Condenser coil may need to be cleaned at startup in case oil from the
manufacturing process is found on the condenser coil.
80 DB / 67 WB Deg. Return Air
Cooling
Input
Pressure 65°
(1000 BTU)
24
135
30
135
36
135
Suction
42
129
48
132
60
130
24
250
30
247
36
250
Liquid
42
248
48
265
60
256
Table 7. Cooling Performance – AC Models
Air Temperature Entering Evaporator Coil, Degree F
70°
75°
80°
82°
85°
90°
95°
100° 105° 110° 115°
136
137
139
139
141
143
146
148
150
152
154
137
140
142
143
145
147
150
152
154
155
157
137
140
142
143
144
147
149
151
152
154
155
132
135
139
140
141
143
145
146
147
148
149
136
139
143
144
145
146
147
149
151
152
154
131
133
134
135
136
139
141
144
146
149
152
266
282
298
304
318
340
363
388
413
438
463
269
292
314
323
336
358
380
406
432
457
483
275
301
326
336
351
375
399
423
446
470
493
271
293
316
325
339
362
385
411
436
462
487
286
308
329
338
352
376
400
427
455
482
509
276
296
316
324
340
365
386
415
438
473
503
Page 16 of 19
Issue 2107
507296-03
80 DB / 67 WB Deg. Return Air
Cooling
Input
Pressure 65°
(1000 BTU)
24
130
30
130
36
136
Suction
42
127
48
132
60
133
24
236
30
254
36
267
Liquid
42
238
48
248
60
245
Table 9. Cooling Performance – HP / DF Models
Air Temperature Entering Evaporator Coil, Degree F
70°
75°
80°
82°
85°
90°
95°
100° 105° 110° 115°
134
138
141
143
145
148
151
152
154
155
156
133
136
139
140
141
143
145
147
149
151
153
138
140
142
143
144
145
147
149
151
152
154
131
134
138
139
141
144
147
147
148
148
148
135
138
142
143
144
147
149
151
152
154
155
134
135
136
136
137
138
140
142
146
149
146
255
275
294
302
316
339
362
388
414
440
466
274
294
314
322
336
360
383
410
437
464
491
285
303
322
329
343
367
391
417
443
468
494
259
280
302
310
324
348
371
396
421
445
470
271
294
317
326
340
363
386
412
438
464
490
276
296
316
312
340
365
373
415
438
473
479
Table 8. Heating Performance – HP / DF Models
70 Deg. F Return Air
Air Temperature Entering Evaporator Coil, Degree F
Cooling
Input
Pressure 0°
(1000 BTU)
5°
10°
17°
20°
25°
35°
40°
47°
50°
55°
60°
24
33
41
49
60
65
73
89
97
108
113
121
129
30
31
38
45
55
59
66
81
88
98
102
109
117
36
35
42
49
58
62
69
82
89
98
102
109
115
Suction
42
25
33
42
54
59
68
85
94
106
111
120
129
48
32
39
47
57
62
69
84
92
102
107
114
122
60
30
37
44
54
58
65
80
87
97
101
108
116
24
249
256
263
272
276
283
296
303
312
316
323
329
30
246
253
260
270
274
281
295
302
312
316
323
330
36
251
258
265
275
279
286
300
307
317
321
328
335
Liquid
42
297
300
304
309
311
315
322
326
331
333
337
341
48
289
297
306
318
323
332
349
358
370
375
384
393
60
272
281
290
302
307
316
334
343
355
360
369
378
507296-03
Issue 2107
Page 17 of 19
Page 18 of 19
Wiring Diagrams
Figure 8. Connections Diagram – A/C Constant Torque
Issue 2107
CRANK CASE HEATER (IF USED) HR1
BLK BLK
CONNECTION DIAGRAM A/C (CONSTANT TORQUE BLOWER)
SINGLE PHASE
NOTE: TAP1 FOR FAN ONLY TAP 2 FOR COOLING TAP3 FOR HIGH STATIC COOLING TAP4 AND TAP5 FOR ELECTRIC HEAT- REFER TO HEATING LABEL
INDOOR BLOWER MOTOR
N GL C
B-3
W1 & W2 CAN BE USED TO STAGE ELECTRIC HEAT ACCESSORY ON 10, 15 & 20KW MODELS
5 & 7.5KW HEATER ACCESSORIES FUNCTION OFF W1 ONLY.
J2-1
BLK
BLK
54 3 2 1
J2-6 J2-5 BLK
WHT
BLU
WHT
GRN
L1
K1-1 CONTACTOR
T1
C12 DUAL CAPACITOR
YEL
H
C
S
R
C
COMPRESSOR
B1
F
TRANSFORMER TI
L B3
INDOOR BLOWER MOTOR
G
N
BLK W/ STRIPE
BLK 208V 240V
24V
BLU
RED
YEL
YEL
CONTACTOR KI
GRN
J1-12
S173
YEL
BLU S79 YEL
THERMOSTAT
WHT
G S1
W1 C R
S4
J1-11
YEL Y
J1-2 ORG J1-1 BLACK J1-3
YEL W/ STRIPE
BLK RED
208/230-1-60 POWER SUPPLY WITH MIN.
75 C COPPER WIRE
T2
CONTACTOR K1-2
L2
GRY
OUTDOOR
FAN
B4
MOTOR
PUR
LINE VOLTAGE FIELD INSTALLED
YEL W/ STRIPE J2-2
J2-4
J1: PLUG THROUGH CONTROL PANEL (12 PIN) J2: PLUG FOR ACCESSORY HEAT (6 PIN)
THERMAL PROTECTION SWITCH (IF USED)
LOW PRESSURE SWITCH (IF USED)
NOTE: IF ANY OF THE ORIGINAL WIRE IS REPLACED THE SAME SIZE AND TYPE WIRE MUST BE USED. USE COPPER CONDUCTOR ONLY, MIN 75 C WIRE
HIGH PRESSURE SWITCH
CONTROL CIRCUIT WIRING TO BE 24 VOLT, N.E.C. CLASS 2
WARNINGELECTRIC SHOCK HAZARD. UNIT MUST BE GROUNDED IN ACCORDANCE WITH NATIONAL AND LOCAL CODES.
537663-01
507296-03
Page 19 of 19
Figure 9. Connections Diagram – Heat Pump Constant Torque
Issue 2107
DIAGNOSTIC CODES FOR DEFROST CONTROL LEDS
(See instructions or markings on System Diagnostic Module for codes of System
Diagnostic Module)
Description No Power to Control Normal Operation / Power to
Control Anti-Short Cycle Lockout Low Pressure Switch Fault Low Pressure Switch
Lockout High Pressure Switch Fault High Pressure Switch Lockout
DS1 (GREEN) OFF
DS2 (RED) OFF
Simultaneous Slow Flash
Alternate Slow Flash
OFF
Slow Flash
OFF
ON
Slow Flash
OFF
ON
OFF
Note: Because the Pressure Switches are monitored only when “Y1” (Input) is
active, the code for pressure switch open will not be seen when “Y1” is off.
Instead, the “Normal Operation” or “Anti Short Cycle” code will be seen.
Also, when a pressure switch opens and caused a short cycle lockout, the
pressure switch-open code will be seen until it closes, then the short cycle
lockout code will flash unless it has already expired.
J1: PLUG THROUGH CONTROL PANEL (12 PIN) J2: PLUG FOR ACCESSORY HEAT (6 PIN)
J2-1 BLK
BLK
BLK
208/230V-1PH,60HZ
L1 CONTACTOR
CRANK CASE HEATER (IF USED) HR1
BLK BLK
K1-1 BLK
T1
C12
C
S
R
FAN
NC
C
DEFROST CONTROL
CMC1
F
PUR
ORG C
COMPRESSOR B1
YEL
H
DUAL CAPACITOR
J1-2 J1-1
BLK J1-3
T1 TRANSFORMER
208V 240V
24V
L
B3 INDOOR BLOWER MOTOR
G
N
WHT
BLU
BLU
BLK RED
CONTACTOR K1-2
L2
T2
GRY YEL W/STRIPE
CONDENSER FAN MOTOR
B4
J2-2
YEL W/STRIPE
YEL GRN
YEL
CONNECTION DIAGRAM, HEAT PUMP CONSTANT TORQUE BLOWER, SINGLE PHASE
NOTE: TAP1 FOR FAN ONLY TAP 2 FOR COOLING TAP3 FOR HIGH STATIC COOLING TAP4
AND TAP5 FOR ELECTRIC HEAT- REFER TO HEATING LABEL
NOTE: IF ANY OF THE ORIGINAL WIRE IS REPLACED THE SAME SIZE AND TYPE WIRE MUST BE USED. USE COPPER CONDUCTOR ONLY, MIN 75 C WIRE
INDOOR BLOWER MOTOR
N
G
L
C
543 2 1
W1 & W2 CAN BE USED TO STAGE ELECTRIC HEAT ACCESSORY ON 10, 15 & 20KW MODELS
5 & 7.5 KW HEATER ACCESSORIES FUNCTION OFF W1 ONLY.
J2-6
J2-5
BLK
WHT
BLU RED
FLOAT SWITCH (IF USED)
YEL
WHT GRN
REV. VALVE
L1
LOW PRESSURE SWITCH
S79
DEFROST T’STAT
S6
BLU
CONTACTOR
K1
DEFROST CONTROL
FAN
GRY GRY BLK BLK
BRN BRN
J1-5 J1-6 J1-8 J1-9 J1-7
J1-10
O-OUT LO-PS DF
COMMON
Y1 OUT
YEL
J1-11
YEL
J1-12 HI-PS
THERMAL PROTECTION SWITCH (IF USED)
S173
W1 C L R
24 V O Y1
CMC1
BLU
J2-4
HIGH PRESSURE SWITCH
S4
WHT
WHT BLU
RED ORG YEL
THERMOSTAT
G W1 C R O Y
S1 CONTROL CIRCUIT WIRING TO BE 24 VOLT, NEC CLASS-2
WARNINGELECTRIC SHOCK HAZARD. UNIT MUST BE GROUNDED IN ACCORDANCE WITH NATIONAL AND LOCAL CODES.
LINE VOLTAGE FIELD INSTALLED
537661-01
507296-03
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