McQuay FCV007 Installation Manual
McQuay®Enfinity
™
Vertical Water Source Heat Pumps
Unit Sizes 007 – 012 / R-22 Refrigerant
Unit Sizes 019 – 060 / R-410A Refrigerant
Contents
Model Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Transportation & Storage . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Cleaning & Flushing System . . . . . . . . . . . . . . . . . . . . 6
Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Ty pical Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . 9-11
Unit Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-14
Thermostat Connections. . . . . . . . . . . . . . . . . . . . 16-17
Options for Mark IV/AC Units . . . . . . . . . . . . . . . . 18-19
Field Installed Options on MicroTech Units . . . . . . . . 20
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . 21
Troubleshooting WSHP. . . . . . . . . . . . . . . . . . . . . 22-23
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Troubleshooting Refrigeration Circuit . . . . . . . . . . . . . 24
Installation & Maintenance Data
Group: WSHP
Part Number: 106751101
Date: November 2003
IM 778
©2003 McQuay International
®
Page 2 / IM 778
Transportation & Storage
Installation
General
Upon receipt of the equipment, check carton for visible
damage. Make a notation on the shipper’s delivery ticket
before signing. If there is any evidence of rough handling,
immediately open the cartons to check for concealed damage. If any damage is found, notify the carrier within 48
hours to establish your claim and request their inspection
and a report. The Warranty Claims Department should then
be contacted.
Do not stand or transport the machines on end. For stor-
ing, each carton is marked with “up” arrows.
In the event that elevator transfer makes up-ended positioning unavoidable, absolutely ensure that the machine is
in the normal upright position for at least 24 hours before
operating.
Temporary storage at the job site must be indoors, completely sheltered from rain, snow, etc. High or low temperatures naturally associated with weather patterns will not
harm the conditioners. Excessively high temperatures,
140°F (60°C) and higher, may deteriorate certain plastic
materials and cause permanent damage.
1. To prevent damage, do not operate this equipment for
supplementary heating and cooling during the construction period.
2. Inspect the carton for any specific tagging numbers
indicated by the factory per a request from the
installing contractor. At this time the voltage, phase
and capacity should be checked against the plans.
3. Check the unit size against the plans to ensure unit
installation is in the correct location.
4. Before installation, check the available closet dimensions versus the dimensions of the unit.
5. Note the location and routing of water piping, condensate drain piping, and electrical wiring. The locations of
these items are clearly marked on submittal drawings.
6. The installing contractor will find it beneficial to confer
with piping, sheet metal, and electrical foremen before
installing any conditioners.
7. We recommend that the contractor cover the conditioners with plastic film to protect the machines during
finishing of the building. This is critical while spraying
fireproofing material on bar joists, sandblasting, spray
painting and plastering. If plastic film is not available,
the shipping carton may be modified to cover the units
during construction.
Model Nomenclature
Product Category
W = WSHP
Product Identifier
FCV = Floor Mounted/Standard Range
FCW = Floor Mounted/Geothermal
Design Series
1 = A Design
2 = B Design
3 = C Design
4 = D Design
Nominal Capacity
007 = 7,000
009 = 9,000
012 = 12,000
019 = 19,000
024 = 24,000
030 = 30,000
036 = 36,000
042 = 42,000
048 = 48,000
060 = 60,000
W FCV 1 009 M E Y L T
Discharge Air
T = Top
Return Air
L = Left
R = Right
Future
(None)
Voltage
A = 115/60/1
E=208-230/60/1
F=208-230/60-/3
J=277-265/60/1
K=460/60/3
L= 575/60/3
50 Hz
M=230/50/1
N = 380/50/3
Note: For illustration purposes only. Not all options available with all models.
Please consult McQuay Sales Representative for specific availability.
Controls
M = Mark IV
L = Microtech 2000
A = BACnet
CAUTION
!
Note: Installation and maintenance must be performed only by qualified personnel who are familiar with local codes
and regulations, and are experienced with this type of equipment.
Sharp edges can cause personal injury. Avoid contact with them.
IM 778 / Page 3
Unit location
1. Locate the unit in an area that allows for easy removal of
the filter and access panels, and has enough space for
service personnel to perform maintenance or repair.
Provide sufficient room to make water, electrical and
duct connections.
2. The contractor should make sure that access has been
provided including clearance for duct collars and fittings
at water and electrical connections.
3. Allow adequate room around the unit for a condensate
trap.
4. The unit can be installed “free standing” in an equipment
room; however, closet installations are more common for
small vertical type units. Generally, the unit is located in
the corner of a closet with the non-ducted return air facing 90° to the door and the major access panels facing
the door as in Figure 1. Alternatively, the unit can have a
ducted return air with the opening facing the door and
the major access panels facing 90° to the door as in
Figure 2.
5. It is recommended that the unit be located on top of a
vibration absorbing material such as rubber or carpet to
reduce any vibration. See Figure 8, page 6.
6. If optional field installed controls are required (boilerless
system), space must be provided for the enclosure to
mount around the corner from the electrical entrances.
Do not locate the side of the unit too close to a wall. See
Figures 1 and 2.
Minimum distance requirement from return air duct
collar to wall, for non-ducted units.
Model Distance
007 – 012 4 inches
019 – 024 5 inches
030 – 036 6 inches
042 – 048 8 inches
Filter access
Each unit is shipped with a filter bracket for side filter
removal.
Heat Pump with
Left-Hand
Return Air
Arrangement
Heat Pump with
Right-Hand
Return Air
Arrangement
Heat Pump with
Left-Hand
Return Air
Arrangement
Heat Pump with
Right-Hand
Return Air
Arrangement
Return
Air
Opt. Controls
Elec. Entrance
Main Access Panel
Return
Air
Opt. Controls
Elec. Entrance
Main Access Panel
Condensate
Water Supply
Water Return
Condensate
Water Supply
Water Return
Return Air Thru
Louvered Door
Risers
Return Air Thru
Louvered Door
Return
Air
Duct &
Grille
Opt. Controls
Elec. Entrance
Main Access Panel
Opt. Controls
Elec. Entrance
Main Access Panel
Condensate
Water Supply
Water Return
Condensate
Water Supply
Water Return
Risers
Return
Air
Duct &
Grille
NOTE: Minimum distance
requirement for non-ducted
units. (see chart above).
Figure 1. Typical closet installation with louver door return
Figure 2. Typical closet installation with ducted return
Page 4 / IM 778
Ductwork and attenuation
Discharge ductwork is normally used with these conditioners. Return air ductwork may also be required, but will
require field installation of a return air duct collar/2" (51mm)
filter rack kit.
All ductwork should conform to industry standards of
good practice as described in ASHRAE Systems Guide.
The discharge duct system will normally consist of a
flexible connector at the unit, a non-insulated transition
piece to the full duct size, a short run of duct, an elbow
without vanes, and a trunk duct teeing into a branch circuit
with discharge diffusers as shown in Figure 3. The transition
piece must not have an angle greater than 30° or severe
loss of air performance can result. Do not connect the full
duct size to the unit without using a transition piece down
to the size of the discharge collar on the unit. With metal
duct material, the sides only of the elbow and entire branch
duct should be internally lined with acoustic insulation for
sound attenuation. Glass fiber duct board material is more
absorbing and may permit omission of the flexible
connector.
The ductwork should be laid out so that there is no line
of sight between the conditioner discharge and the distribution diffusers.
Return air ducts can be brought in through a wall grille
and then to the unit. The return duct system will normally
consist of a flexible connector at the unit and a trunk duct
to the return air grille. With metal duct material, the return
air duct should be internally lined with acoustic insulation
for sound attenuation. Glass fiber duct board material is
more absorbing and may permit omission of the flexible
connector.
Return air ductwork to the unit requires the optional
return air duct collar/2" (51mm) filter rack kit. See Figure 4
and 5. The kit can be installed for face side or bottom filter
removal. The flexible connector can then be attached to the
1" (25mm) duct collar.
Do not use sheet metal screws directly into the unit
cabinet for connection of supply or return air ductwork,
especially return air ductwork which can puncture the drain
pan or the air coil.
Ventilation air
Outside air may be required for ventilation. The temperature of the ventilation air must be controlled so that mixture
of outside air and return air entering the conditioner does
not exceed application limits. It is also general practice to
close off the ventilation air system during unoccupied periods (night setback).
The ventilation air system is generally a separate building subsystem with distribution ductwork. Introduce outside
air into each return air plenum chamber reasonably close to
the conditioner air inlet. Do not duct outside air directly to
the conditioner inlet. Provide sufficient distance for thorough mixing of outside and return air. See “Operating limits”
on page 8.
Square Elbow
(Both Sides
Internally Lined
With Acoustic
Insulation)
Trunk Duct
2 ft. x 2 ft.
Diffuser
Discharge
Collar
Heat Pump
Duct
Transition
Branch Duct
(Internally Lined)
Figure 3.
Figure 4. Sizes 007 thru 048 Optional 2” Return Air Duct
Collar Filter Rack
Figure 5. Size 060 Optional 2” Return Air Duct Collar
Filter Rack
IM 778 / Page 5
Electrical Data
1. Verify the compatibility between the voltage and phase
of the available power and that shown on the unit serial
plate. Line and low voltage wiring must comply with local
codes or the National Electrical Code, whichever
applies.
2. Apply correct line voltage to the unit. A
7
⁄8" (22mm) hole
and/or a 1
1
⁄8" (29 mm) knockout is supplied on the side
of the unit. A disconnect switch near the unit is required
by code. Power to the unit must be sized correctly and
have dual element (Class RK5) fuses or an HACR circuit
General
breaker for branch circuit overcurrent protection. See the
nameplate for correct ratings.
3. Three phase 50 cycle units, 380/50/3, require a neutral
wire for 230/50/1 power to the fan circuit.
4. Connect the thermostat/subbase wiring with the power
“off ” to the unit.
5. Field supplied relays installed on the input terminals
W1, W2, Y1, Y2 or G may introduce electrical noise.
Never install relay coils in series with the inputs.
230 Volt Operation
Fan Assembly
All 208-230 volt single-phase and three-phase units are factory wired for 208 volt operation. For 230 phase operation,
the line voltage tap on the 24 volt transformer must be
All fan motors are multi-speed, PSC type with integral
mounting brackets and thermal overload protection. The
motor is isolated from the fan housing for minimum vibration transmission. Fan motors have a terminal strip on the
motor body for simple motor speed change without going
back to the control box. All the fan/motor assemblies have
a removable orifice ring on the housing to accommodate
changed. Disconnect and cap the red lead wire and interchange it with the orange lead wire on the primary of the 24
volt transformer.
Piping
1. All units should be connected to supply and return piping in a two-pipe reverse return configuration. A
reverse return system is inherently self-balancing and
requires only trim balancing where multiple quantities
of units with different flow and pressure drop characteristics exist in the same loop. Check for proper water
balance by measuring differential temperature reading
across the water connections. For proper water flow,
the differential flow should be 10°F to 14°F (5°C to 8°C)
for units in cooling mode.
A direct return system may also work acceptably,
but proper water flow balancing is more difficult to
achieve and maintain.
2. The piping can be steel, copper or PVC.
3. Supply and return runouts usually join the unit via short
lengths of high pressure flexible hose which are sound
attenuators for both unit operating noise and hydraulic
pumping noise. One end of the hose should have a
swivel fitting to facilitate removal for service. Hard piping also can be brought directly to the unit. This option
is not recommended since no vibration or noise attenuation can be accomplished. The hard piping must
have unions to facilitate unit removal. See Figures 8, 9,
and 10 for typical piping setup.
4. Some flexible hose threaded fittings are supplied with
sealant compound. If not, apply Teflon tape for a tight
seal.
5. Supply and return shutoff valves are required at each
conditioner. The return valve is used for balancing and
should have a “memory stop” so that it can always be
closed off but can only be reopened to the proper position for the flow required.
6. Do not connect any unit to the supply and return piping until the water system has been cleaned and
flushed completely. After the cleaning and flushing has
taken place, the initial connection should have all
valves wide open in preparation for water system flushing.
7. Condensate piping can be steel, copper or PVC. Each
unit includes a condensate connection.
8. Units are internally trapped.
motor and fan wheel removal without disconnecting the
ductwork. The fan housing protrudes through the cabinet
allowing adequate material for connection of flexible duct.
Each model unit is shipped from the factory for maximum
performance and minimum sound requirements. Fan sound
levels and performance can be affected by external static
pressure.
Figure 6. Sizes 007 through 012
Figure 7. Sizes 019 through 060
FAN
MOTOR
FAN
MOTOR
WHITE (COMMON)
BROWN (CAPACITOR)
BLUE (HIGH SPEED) SIZE 007, 009, 012
RED (LOW SPEED)
WHITE (COMMON)
BROWN (CAPACITOR)
BLACK (HIGH SPEED) SIZES 024, 030,
036, 042, 060
RED (LOW SPEED)
SIZES - 019, 048
Page 6 / IM 778
9. Do not locate any point in the drain system above the
drain connection of any unit.
10. Automatic flow controlled devices must not be
installed prior to system cleaning and flushing.
11. A high point of the piping system must be vented.
12. Check local code for the need for dielectric fittings.
Figure 8. Typical Vertical Unit Piping
Ball Valve with
Y-Strainer
Isolator Pad
Flexible Return Hose with
Swivel Fittings
Condensate
Drain
Supply Air
Flexible Duct Collar
Two 90° Turns
(Ductwork Sized
Based on Airflow)
Accoustical Thermal
Duct Lining (10’)
Cleaning & Flushing System
1. Prior to first operation of any conditioner, the water circulating system must be cleaned and flushed of all construction dirt and debris.
If the conditioners are equipped with water shutoff
valves, either electric or pressure operated, the supply
and return runouts must be connected together at each
conditioner location. This will prevent the introduction of
dirt into the unit. See Figure 9.
Figure 9.
2. Fill the system at the city water makeup connection with
all air vents open. After filling, close all air vents.
The contractor should start main circulator with the
pressure reducing valve open. Check vents in sequence
to bleed off any trapped air, ensuring circulation through
all components of the system.
Power to the heat rejector unit should be off, and the
supplementary heat control set at 80°F (27°C).
While circulating water, the contractor should check
and repair any leaks in the piping. Drains at the lowest
point(s) in the system should be opened for initial flush
and blow-down, making sure city water fill valves are set
to make up water at the same rate. Check the pressure
gauge at pump suction and manually adjust the makeup
to hold the same positive steady pressure both before
and after opening the drain valves. Flush should continue for at least two hours, or longer if required, to see
clear, clean drain water.
3. Shut off supplemental heater and circulator pump and
open all drains and vents to completely drain down the
system. Short circuited supply and return runouts should
now be connected to the conditioner supply and return
connections. Do not use sealers at the swivel flare connections of hoses.
4. Trisodium phosphate was formerly recommended as a
cleaning agent during flushing. However, many states
and localities ban the introduction of phosphates into
their sewage systems. The current recommendation is to
simply flush longer with warm 80°F (27°C) water.
Return Runout
Supply Runout
Mains
Flexible Hose
Runouts Initially
Connected Together
Note: Do not over-torque fittings. The maximum torque without damage to
fittings is 30 foot pounds. If a torque wrench is not available, use as a rule
of thumb, finger-tight plus one quarter turn.
Return Air
Flexible Supply Hose with
Swivel Fittings
Ball Valve
with Mesurflo
®
Line Voltage Disconnect
Blower Motor Access
IM 778 / Page 7
Start-up
1. Open all valves to full open position and turn on power
to the conditioner.
2. Set thermostat for “Fan Only” operation by selecting
“Off” at the system switch and “On” at the fan switch.
If “Auto” fan operation is selected, the fan will cycle
with the compressor. Check for proper air delivery.
3. For those units that have two-speed motors, reconnect
for low speed operation if necessary.
4. Set thermostat to “Cool.” If the thermostat is an automatic changeover type, simply set the cooling temperature to the coolest position. On manual changeover
types additionally select “Cool” at the system
switch.
Again, many conditioners have time delays which
protect the compressor(s) against short cycling. After a
few minutes of operation, check the discharge grilles
for cool air delivery. Measure the temperature difference between entering and leaving water. It should be
approximately 1
1
⁄2 times greater than the heating mode
temperature difference. For example, if the cooling
temperature difference is 15°F (8°C), the heating temperature difference should have been 10°F (5°C).
Without automatic flow control valves, target a cooling
temperature difference of 10°F to 14°F (5°C to 8°C).
Adjust the combination shutoff/balancing valve in the
return line to a water flow rate which will result in the
10˚F to 14°F (5°C to 8°C) difference.
5. Set thermostat to “Heat.” If the thermostat is the automatic changeover type, set system switch to the
“Auto” position and depress the heat setting to the
warmest selection. Some conditioners have built-in
time delays which prevent the compressor from immediately starting. With most control schemes, the fan will
start immediately. After a few minutes of compressor
operation, check for warm air delivery at discharge
grille. If this is a “cold building” start-up, leave unit running until return air to the unit is at least 65°F (18°C).
Measure the temperature difference between entering and leaving air and entering and leaving water. With
entering water of 60°F to 80°F (16°C to 27°C), leaving
water should be 6°F to 12°F (3.3°C to 6.6°C) cooler,
and the air temperature rise through the machine
should not exceed 35°F (19°C). If the air temperature
exceeds 35°F (19°C), then the water flow rate is inadequate.
6. Check the elevation and cleanliness of the condensate
line. If the air is too dry for sufficient dehumidification,
slowly pour enough water into the condensate pan to
ensure proper drainage.
7. If the conditioner does not operate, check the following
points:
a. Is supply voltage to the machine compatible?
b. Is thermostat type appropriate?
c. Is thermostat wiring correct?
8. If the conditioner operates but stops after a brief period:
a. Is there proper airflow? Check for dirty filter, incor-
rect fan rotation (3-phase fan motors only), or incorrect ductwork.
b. Is there proper water flow rate within temperature
limits? Check water balancing; backflush unit if dirtclogged.
9. Check for vibrating refrigerant piping, fan wheels, etc.
10. Do not lubricate the fan motor during the first year of
operation as it is pre-lubricated at the factory.
11. Field supplied relays installed on the input terminals
W1, W2, Y1, Y2 or G may introduce electrical noise.
Never install relay coils in series with the inputs.
5. Refill the system with clean water. Test the water using
litmus paper for acidity, and treat as required to leave the
water slightly alkaline (pH 7.5 to 8.5). The specified percentage of antifreeze may also be added at this time.
Use commercial grade antifreeze designed for HVAC
systems only. Do not use automotive grade antifreeze.
Once the system has been filled with clean water and
antifreeze (if used), precautions should be taken to protect the system from dirty water conditions. Dirty water
will result in system wide degradation of performance
and solids may clog valves, strainers, flow regulators,
etc. Additionally, the heat exchanger may become
clogged which reduces compressor service life or caus-
es premature failure. A SystemSaver
™
from McQuay
should be employed to continuously re-move solids as
the system operates. Contact your local representative
for further information on this device.
6. Set the loop water controller heat add setpoint to 70°F
(21°C) and the heat rejection setpoint to 85°F (29°C).
Supply power to all motors and start the circulating
pumps. After full flow has been established through all
components including the heat rejector (regardless of
season) and air vented and loop temperatures stabilized,
each of the conditioners will be ready for check, test and
start-up, air balancing, and water balancing.
Page 8 / IM 778
Operating Limits
Extended Range
Standard Units
Units
Cooling Heating Cooling Heating
Min. Ambient Air 50˚F/10˚C 50˚F/10˚C 40˚F/5˚C 40˚F/5˚C
Normal Ambient Air 80˚F/27˚C 70˚F/21˚C 80˚F/27˚C 70˚F/21˚C
Max. Ambient Air 100˚F/38˚C 85˚F/29˚C 100˚F/38˚C 85˚F/29˚C
Min. Ent. Air ➀ ➁ 50˚F/10˚C 50˚F/10˚C 50˚F/10˚C 40˚F/5˚C
Normal Ent. Air, 80/67˚F 70˚F 80/67˚F 70˚F
dw/wb 27/19˚C 21˚C 27/19˚C 21˚C
Max. Ent. Air 100/83˚F 80˚F 100/83˚F 80˚C
db/wb ➀ ➁ 38/28˚C 27˚C 38/28˚C 27˚C
➀ At ARI flow rate.
➁
Maximum and minimum values may not be combined. If one
value is at maximum or minimum, the other two conditions
may not exceed the normal condition for standard units.
Extended range units may combine any two maximum or
minimum conditions, but not more than two, with all other
conditions being normal conditions.
This equipment is designed for indoor installation only.
Sheltered locations such as attics, garages, etc., generally
will not
provide sufficient protection against extremes in
Environment
Standard units FCV
Units are designed to start and operate in an ambient of
40°F (5°C), with entering air at 40°F (5°C), with entering
water at 70°F (21°C), with both air and water flow rates
used in the ARI Standard 320-86 rating test, for initial startup in winter.
Note: This is not a normal or continuous operating con-
dition. It is assumed that such a start-up is for the purpose
of bringing the building space up to occupancy temperature.
Extended range units FCW
Extended range heat pump conditioners are designed to
start and operate in an ambient of 40°F (5°C), with entering
air at 40°F (5°C), with entering water at 25°F (-4°C), with
both air and water at flow rates used in the ARI Standard
330-86 rating test, for initial start-up in winter.
Note: This is not a normal or continuous operating con-
dition. It is assumed that such a start-up is for the purpose
of bringing the building space up to occupancy temperature.
temperature and/or humidity, and equipment performance,
reliability, and service life may be adversely affected.
Air limits
Water limits
Extended Range
Standard Units
Units
Cooling Heating Cooling Heating
Min. Ent. Water ➀ ➁ 55°F/13°C 55°F/13°C 30°F/-1°C 20°F/-6°C
Normal Ent. Water 85°F/29˚C 70˚F/21°C 77°F/25˚C 40˚F/5°C
Max. Ent. Water ➀ ➁ 110°F/43˚C 90°F/32°C 110°F/43˚C 90°F/32°C
Additional Information For Initial Start-up Only
Operating voltages
115/60/1 . . . . . . . . . . . . . . . 104 volts min.; 127 volts max.
208-230/60/1 . . . . . . . . . . . 197 volts min.; 253 volts max.
265/60/1 . . . . . . . . . . . . . . . 238 volts min.; 292 volts max.
230/50/1 . . . . . . . . . . . . . . . 197 volts min.; 253 volts max.
460/60/3 . . . . . . . . . . . . . . . 414 volts min.; 506 volts max.
380/50/3 . . . . . . . . . . . . . . . 342 volts min.; 418 volts max.
575/60/3 . . . . . . . . . . . . . . . 515 volts min.; 632 volts max.
Note: Voltages listed are to show voltage range. However,
units operating with overvoltage and under voltage for
extended periods of time will experience premature component failure. Three phase system unbalance should not
exceed 2%.
IM 778 / Page 9
Typical Wiring Diagrams
Notes:
1. Unit is factory wired for 208V operation. If 230V
power supply is used, transformer must be
rewired by disconnecting the power lead from the
red transformer primary wire and connecting the
power lead to the orange transformer primary
wire. Place an insulation cap on the red transformer primary wire.
2. All temperature and pressure switches are normally closed.
3. Component layout shown below is typical. Some
components may not be used on this model or
voltage.
4. Mark IV/AC controller board contains a static sensitive microprocessor. Proper grounding of field
service personnel should be observed or damage
to controller may result.
5. Terminal block on Mark IV/AC board provides 24
VAC at terminals R and C. All other outputs are 24
VDC.
6. Field supplied relays installed on the input ter-
minals (W1, W2, Y1 or G) may interfere with
proper unit operation. Never install relay coils
in series with inputs.
7. For more information pertaining to the Mark IV/AC
controller, refer to OM120.
Figure 10. Typical Mark IV/AC wiring diagram
COMPONENT LAYOUT
➀ COMPRESSOR CONTACTOR
➁ FAN CONTACTOR
➂ TRANSFORMER
➃ PC BOARD
➄ AUXILIARY RELAY
➅ CIRCUIT BREAKER
CC - Compressor Contactor
HTR - Crankcase Heater (Optional)
CAP - Motor Capacitor
060 - Blk
048 - Red
042 - Blk
036 - Blk
030 - Blk
L1 L2
Compr
Motor
Heater
Fan
Motor
CC
Ground
Lo Temp
Hi Pressure
Lo Pressure
Reversing Valve
Solenoid
Condensate
Sensor
L1
UAP
L
Fan
RC
V
Common
W
W1Y
0
G
FE
2
1
Compressor
Mark IV
PC
Board
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