COPPER TUBE/ALUMINUM FIN COILS: %RWKLQGRRUDQGRXWGRRUFRLOVDUHGHVLJQHGDQGPDWFKHGWR
optimize heat transfer while PLQLPL]LQJVL]HDQGFRVWZLWKLQFUHDVHGGXUDELOLW\DQGUHOLDELOLW\
3
Central Air ConditioningModel: Heat Pump, HR13-D1
CABINETS:
a durable finish
Fig.1-1
Fig.1-2
Constructed of powder painted galvanized steel to provide
and protection for the outdoor coil.
FAN GUARD AND MOTOR BRACKET:
Welded powder coated guard with independent rod and band motor
bracket, unit top has a deep draw fan venturi for efficient air flow.
SERVICE VALVES: Facilitates unit servicing and provides a reliable and
safe access to measure unit
pressures .
Fig.1-3
BASE PAN: This deep-drawn base keeps the bottom of the coil off the
ground, has weep holes to allow for complete drainage.
Fig.1-4
Bi-flow filter drier: Prolong unit life and system reliability by keeping
refrigerant clean and dry.
Fig.1-5
FLOWCHECK DISTRIBUTORS: Outdoor units use the Flowcheck Distributor to act as an open check
valve in the cooling mode.
ACCESSORIES:
LOW AMBIENT CONTROL: This factory installed option allows for low temperature operation in
the cooling cycle ambient temperatures down to 0
operate in cooling when outdoor
commercial applications.
START COMPONENTS : This option provides additional starting for covering a wide range of voltages
and system pressure combinations. This option maybe required on reciprocating compressors with
flowcheck piston metering.
SERVICE VALVES AND PRESSURE PORTS: Mounted external to the cabinet for easy access at
installation and during service.
4
ambient temperatures below 65
. This control should be installed in units that
, and is recommended for all
Model: Heat Pump, HR13-D1
Central Air Conditioning
SEER 13.013.013.013.013.013.013.0
Total Input Watts ˄Cooling˅1,7302,1802,4603,060380040905150
3.33.43.43.33.53.53.4
16,50022,50025,50032,00041,00044,00055,000
Heating Capacity (Btu/h) (8.3ć)
Heating COP (8.3ć)
Heating HSPF7.87.87.87.87.87.87.8
Total Input Watts ˄Heating˅1460.01940.02200.02840.03430.03680.04740.0
Tube spacings (V x H) (In)1 x 0.851 x 0.851 x 0.851 x 0.851 x 0.851 x 0.851 x 0.85
Fins per Inch - FPI21212121171721
Fin TypeEnhanced finsEnhanced finsEnhanced finsEnhanced finsEnhanced finsEnhanced finsEnhanced fins
Tube OD and Type3/8" Grooved3/8" Grooved3/8" Grooved3/8" Grooved3/8" Grooved3/8" Grooved3/8" Grooved
Gross Finned Face Area (Sq Ft)10.816.018.418.418.420.925.8
Number of Circuits (In/Out)4/44/45/55/57/79/910/10
Cabinet colorWhite White White White White White White
Top coverStamped sheet metal Stamped sheet metalStamped sheet metalStamped sheet metal Stamped sheet metalStamped sheet metalStamped sheet metal
Condenser coil
Exterior Appearance
Body style /
BasepanDeep Drawn, Elevated Deep Drawn, Elevated Deep Drawn, Elevated Deep Drawn, Elevated Deep Drawn, Elevated Deep Drawn, Elevated Deep Drawn, Elevated
Service panelEasy AccessEasy AccessEasy AccessEasy AccessEasy AccessEasy AccessEasy Access
product.
WARNING: THE MANUFACTURER’S WARRANTY DOES NOT COVER DAMAGE TO CAUSED BY
THE USE OF ANSUTHORIZED COMPONENTS OR ACCESSORIES, THE USE OF SUCH
UNAUTHORIZED COMPONENTS OR ACCESSORIES MAY ENDANGER LIFE AND
PROPERTY. THE MANUFACTURER DISCLAIMS ANY RESPONSIBILITY FOR SUCH LOSS
OR INJURY RESULTING FROM THE USE OF SUCH UNAUTHORIZED COMPONENTS OR
ACCESSORIES
ƽ Always use industry-recognized service practices in the maintenance, adjustment and repair of the
products covered in this manual.
ƽ Always wear safety glasses when handling refrigerant and peforming brazing operations.
ƽ Follow the manufacturer’s instructions when making repairs, installing replacement parts and
performing system maintenance.
ƽ Use only authorized factory parts.
installing, operating, maintaining or repairing the
4. SYSTEM COMPONENTS AND FUNCTIONS
This section describes the various air conditioning components, their purpose and operation. This
section is only a guide and does not consider all components that could be found on an air conditioner in
the field.
COMPRESSORS (Fig. 4-1)
The heart of any refrigerant system is the compressor. It is a pump that causes refrigerant to flow. There
are several different types of compressors, but all use electricity to turn an electric motor to drive a pump.
Central air conditioners use two types of compressors. The first is the enhanced reciprocating compres-
-sor. it operates with an offset crankshaft and pistons, and resembles an internal combustion engine.
the driving force is supplied by an electric motor turning the crankshaft and forcing pistons up and
down in cylinders where valves control the flow of refrigerant. The valves provide a seal between high
and low pressure sides of the system. If the valves are damaged, the compressor’s function and
efficiency is reduced.
Reciprocating type compressorScroll type compressor
Fig.4-1
Generally, liquid refrigerant is suspected if valve damage occurs. Some compressors can tolerate the
presence of small amounts of liquid refrigerant in the return gas, but this condition must be avoided
through proper refrigrant control. Returning refrigerant cools the compressor motor and surrounding the
motor with low pressure
The scroll compressor used a helix (similar in shape to a snail shell)
within a similar stationary helix, the moving helix rotates so that the space between the two constantly
decreases as the gas moves toward the center of the Scrolls. The returning refrigerant gas first cools the
motor, then flows into the suction intake of the compressor scroll. The discharge gas leaves from the
center of the helix and exits the compressor. The lower part of the shell should be cool to the touch.
Current single phase units use two types of compressors. The design of the two compressors types is
quite different. But they function the same way. Scroll units do not need start components or crank
-case heaters. The reciprocating compressor may need both. Both types benefit from using a time-delay.
time delays prevent thermostat short cycling and momentary power interruptions from damaging the
compressor.
8
gas gives it the name of “low-side” shell compressor
to move refrigerant. When paired
.
.
Central Air ConditioningModel: Heat Pump, HR13-D1
Both compressor types are protected internally against over-current and over-temperature conditions.
Some scroll compressors have an additional thermostat mounted externally in series electrically with
the contactor coil.
FAN AND BLOWER MOTORS (Fig. 4-2 and Fig. 4-3)
The outdoor component of split system contains an fan motor. These PSC (permanent split capacitor)
motors are single speed and drive a propeller fan. The motor mounts to the unit top with the shaft up,
This fan pulls outdoor air through the outdoor coil.
Fan
Fig.4-2
To access the condenser fan or motor, carefully remove the unit top, a service loop is provided on the
motor wiring for easier access.
Fan and motor assembly
Fig4-3
METERING DEVICES (Fig. 4-4)
Flow-Check Pistons
One type of refrigerant metering device is the flow-check piston. It has two functions. First it acts as a
refrigerant metering device controlling refrigerant flow into the evaporator. Second, it acts as an open
check valve when refrigerant flows in the opposite direction.
When refrigerant enters the device from the square end, the piston seats and forces all refrigerant throug
the carefully sized hole in the center of the piston. This orifice functions as a metering device controlling
the amount of refrigerant flow, with flow in the opposite direction, pressure moves the piston off the seat
and liquid refrigerant flows around the piston.
Using too small a piston starves the coils of refrigerant. A piston that is too large floods coils.
Mismatching indoor and outdoor units of split systems affects performance, efficiency, charging and
reliability.
PROPER MATCH OF UNIT AND PISTON SIZES
Split air conditioning indoor and outdoor units must be carefully matched to balance the heat transfer
indoors with the heat resected or claimed by the outdoor unit. Manufacturer's
specification sheets and
installation manuals should be followed to insure proper match. Matched systems are listed on the
internet at ARI. ORG.
Combinations for indoor and outdoor units using a distributor and flowcheck are shown in the application
table 6-2.
h
Distributor assy
Fig.4-4
9
Central Air ConditioningModel: Heat Pump, HR13-D1
REFRIGERANT CIRCUIT (Fig. 4-5)
All 13SEER units outdoor coils are multi-circuit. Refrigerent gas or liquid is uniformly distributed to from
4 to 10 circuits to improve heat transfer and reduce capacity losses due to pressure drops.
Fig.4-5
SERVICE VALVES
There are two types of service valve used on these air conditioning units. They are the service port valve
or “Schrader valve” and the refrigerant line valve. The Schrader valve is like a valve in an automobile tire.
The stem or core is removable with a flexible seal at its base held closed with a spring. Schrader valves
allow a technician to connect gages to the system with a minimum loss of charge. Use a cap with an
inner seal to prevent leakage and keep dirt and moisture from entering the system.
Refrigerant control valves allow the outdoor unit to be isolated into from the balance of the system. In split
systems, these valves also hold the charge in the outdoor section from factory.
5.ELECTRICAL CONTROL DEVICES
THERMOSTATS
Thermostats are the most obvious control in the air conditioning system because these controls are
accessible by the consumer. Contact your local distributor for information on part numbers of
various manual changeover, auto changeover and set-back thermostats or see the thermostat and
subbase selection information found in the wiring diagram booklet.
In the cooling mode, the thermostat calls for cooling by energizing the compressor contactor and the
indoor blower control. The indoor blower can operate continuously by setting the thermostat subbase fan
switch to the “ON” position.
PROTECTION DEVICES
Protection for the unit begins with the installation of appropriate fuses or circuit breakers by the installing
contractor. Breaker or fuse size is governed by the National Electrical Code and local code. AMP draw
requirements for each unit are found in the Specifications.
OVERLOADS AND LIMITS
Overloads protect against over-current or over-temperature conditions. Those located in the outdoor unit
include the automatic reset internal overload in the fan motor and the compressor automatic reset
internal overload. Such controls are not serviceable but their operation may influence service
troubleshooting .For example, the compressor internal overload may stay open for several hours .A
technician may incorrectly diagnose this as an open compressor winding.
HIGH PRESSURE CUT OUT SWITCH (optional) (Fig. 5-1)
The high pressure cut-out is a pressure activated switch. It opens an electrical circuit when the
refrigerant pressure exceeds a pre-determined limit of 440 to 460 p.s.i.g. When pressure becomesnormal, the switch restores automatically.
10
Fig. 5 -1
Central Air ConditioningModel: Heat Pump, HR13-D1
RELAYS
Relays provide a method for control switching. Relays may switch either low(24VAC) or line voltage.
Generally relays used in air conditioning use 24VAC coils. Contact voltage may be either low or line voltage.
COMPREESSOR CONTACTOR
The coil uses 24 volts but the contacts carry line voltage .The heater contactor is a large relay,
which controls the compressor and the outdoor fan operation. Some contactor use single pole
contacts ,while others use 2-pole or 3-pole contacts.
Single-pole contactors break only one side of the power feed to the compressor and outdoor fan. The other side
remains connected to the power source. The 2-pole or 3-pole contactor breaks power to all sides of the
compressor and outdoor fan.
CAUTION: WHEN THERE IS A SINGLE POLE CONTACTOR, ONE SIDE OF A 240 V.A.C.CIRCUIT
REMAINS HOT. THIS MEANS THAT THE WIRING IN THE HIGH VOLTAGE CIRCUIT MAY HAVE A
POTENTIAL OF 120V.A.C.TO GROUD. BEFORE SERVICING THE UNIT, ALWAYS TURN OFF
POWDER AT THE UNIT DISCONNECT SWITCH.
OPTIONAL DELAYS AND KITS
A Time-Delay in the compressor contactor lowcontrol circuit allows time for system pressure to equalize
before re-starting the compressor.
This delay uses solid state circuitry to measure the time since the power was interrupted and is set for
approximately 3 minutes. It is not field adjustable. This is a delay on break timer.
.
Defrost PCB
Fig.5-2
START KITS(OPTIONAL)
This special relay uses the EMF generated by the compressor start windings to take a start capacitor out
of the circuit. The relay and its companion capacitor can start the compressor at low voltages and
against higher pressure, such as those caused by non-bleed port expansion valves.
Start kit components should match the recommended ratings and functions of those provided by the
reciprocating compressor manufactorer. See Specifications start components.
Start kits are not normally required with scroll compressors. The operating characteristics of the scroll
compressor make a start kit unnecessary.
6. APPLICATION
Before specifying any air conditioning equipment, a survey of the structure and a heat gain calculation
must be made. A heat gain calculation involves identifying all surfaces and openings that gain heat from
the surrounding air and quantifying that heat gain. The heat calculation also calculates the extra
heaty load caused by sunlight and by humidity removal. These factors must be considered before
selection an air conditioning system to provide year round comfort. The Air Conditioning Contractors
of America (ACCA) J Manual method of load calculation is one recognized procedure for determining the
cooling load.
The cooling load calculation determines the unit size. There are two capacities that enable the
equipment to provide comfort. The first is sensible capacity.
measured on the dry bulb thermometer.
Sensible heat is the heat energy
11
Central Air ConditioningModel: Heat Pump, HR13-D1
.
The second form of heat is called latent heat. This is heat held by the moisture in the air. Removing
this moisture does not affect a thermometer. However, removing the latent heat in the air greatly increase
comfort. A properly sized unit removes both forms of heat, producing a comfortable conditions,
An oversized system cycles on and off quickly and does not properly remove humidify, producing
uncomfortable. The indoor and outdoor equipment combination should be matched by the manufacturer
and based on engineering data.
After the proper equipment combination has been selected, satisfying both sensible and latent
conditioning requirements, the system must be properly installed. Proper installation with cerefully
distributed air through adequate duct work will provided a comfortable living space.
There are several factors that installers must consider.
ƽ Outdoor unit location
ƽ Proper equipment evacuation
ƽ Outdoor unit refrigerant charge
ƽ Indoor unit air flow
ƽ Indoor unit blower speed
ƽ Supply and return air duct design and sizing
ƽ System air balancing
ƽ Diffuser and return air grille location and sizing
The air distribution system has the greatest effect. On the quality of the installation and the owner satisfaction,
the duct system is totally in the responsibility of the contractor. These are numerous thchnical associations
and reference that recommend correct procedures.
The correct air quantity is critical for correct air conditioning system. Proper operation, efficiency, compressor life
and humidity control depend on the correct balance between indoor load and outdoor unit capacity. High
indoor air flow reduces system dehumidification capacity, and can leave the space humid and uncomfoltable.
Low indoor air flow reduces total capacity, and can causes coil icing. Improper air balance will affect system
performance and customer's satisfaction and can cause premature component failure.
Air conditioning requires a specified air flow. Each ton of air conditioning requires 400 cubic feet of air
per minute (400CFM/TON).
Duct design and construction should be done with care. System performance can be lowered
dramatically through bad planning or workmanship. In cooling, a hot attic can cause a temperature gain
of 3ein the return duct and 4ein the supply duct. This can reduce the cooling capacity of an air
conditioning system by as much as 30%.This means a loss of almost one ton of cooling capacity from a
three ton system.
Air leakage of only 3% in a return duct can cause a 5% loss in system capacity. 3% leakage on a three
ton system is only 30 CFM. Two or three unsealed joints can cause a leak of this size. Sealing the return
and supply ducts result in full system capacity and lower operating costs.
Effective duct insulation is essential to prevent loss of capacity and sweating ducts in the cooling mode.
Duct systems installed in the conditioned space can be left uninsulated , but a dense 1/2” fiberglass duct
liner reduces blower and air noises, and prevents sweating ducts when humidity levels are high.
Supply and return duct systems in attics and crawl spaces require a minimum 1” of dense duct liner or 2”
fiberglass wrap with a sealed vapor barrier. A leaky vapor barrier results in duct sweating, causing wet
insulation
Heat transfer through poorly insulated systems can result in over 50%
ducts also results in rusting that leads to premature duct failure. Carefully follow the industry practices to
insure a well designed duct system.
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 air flow, they can be
noisy. If they are not located properly, they can cause drafts in the rooms. Return air grilles
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 air flow to all rooms in the home. This
These instructions are intended as an aid to qualified, service and instalolation personnel for proper installation
adjustment and operation of this unit. Read these instructions thoroughly before attempting installation or
service this equipment. Failure to follow these instructions may result in improper installation,
service or maintenance and could possibly result in fire, electrical shock, property damage.
13
,
Loading...
+ 28 hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.