DANGER, WARNING, CAUTION, and

NOTE

The signal words DANGER, WARNING, CAU??? TION, and NOTE are used to identify levels of haz??? ard seriousness. The signal word DANGER is only used on product labels to signify an immediate haz??? ard. The signal words WARNING, CAUTION, and NOTE will be used on product labels and through??? out this manual and other manuals that may apply to the product.

DANGER - Immediate hazards which will result in severe personal injury or death.

WARNING - Hazards or unsafe practices which could result in severe personal injury or death.

CAUTION - Hazards or unsafe practices which may result in minor personal injury or product or property damage.

NOTE - Used to highlight suggestions which will result in enhanced installation, reliability, or opera??? tion.

Signal Words in Manuals

The signal word WARNING is used throughout this manual in the following manner:

!WARNING

The signal word CAUTION is used throughout this manual in the following manner:

!CAUTION

Signal Words on Product Labeling

Signal words are used in combination with colors and/or pictures on product labels.

Consult a qualified installer, service agency, or the dealer/distributor for information and assistance. The qualified installer must use factory authorized kits and accessories when modifying this product. Refer to the individual instructions packaged with the kit or accessory when installing.

The weight of the product requires careful and proper handling procedures when lifting or moving to avoid personal injury. Use care to avoid contact with sharp or pointed edges.

Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Use a heat sinking material - such as a wet rag - during brazing operations. Keep a fire extinguisher available. Consult local codes and the National Electric Code (NEC) for special requirements.

Improper installation, adjustment, alteration, service or maintenance can void the warranty.

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in per??? sonal injury or death.

Before installing, modifying or servicing system, turn OFF the main (remote) electrical disconnect device. There may be more than one disconnect device.

Check local codes for regulations concerning zoning, noise, platforms, and other issues.

Locate unit away from fresh air intakes, vents, or bedroom windows. Noise may carry into the openings and disturb people inside.

Locate unit in a well drained area, or support unit high enough so that water runoff will not enter the unit.

Locate unit away from areas where heat, lint, or exhaust fumes will be discharged onto unit (as from dryer vents).

Locate unit away from recessed or confined areas where recirculation of discharge air may occur (refer to CLEARANCES section of this document).

Roof-top installation is acceptable providing the roof will support the unit and provisions are made for water drainage and noise/vibration dampening.

NOTE: Roof mounted units exposed to wind may require wind baffles. Consult the manufacturer for additional information.

Nominal minimum clearances are 48 inches above unit for discharge air and 18 inches on each side of the coil for intake air. Clearance on any one side of the coil (normally between unit and structure) may be reduced to 6 inches. Nominal minimum clearances are based on a solid parallel object such as a wall or roof overhang.

The clearance may be reduced for a single object with small surface area, such as the end of a wall, outside corner of a wall, fence section, post, etc. As a general rule, the minimum clearance from the unit should equal the width of the object. For example, a 6 inch fence post should be a minimum of 6 inches from the unit.

Do not install unit under roof overhangs unless gutters are present. A minimum vertical clearance of 48 inches is required to the overhang.

Inside corner locations on single story structures require evaluation. Large overhanging soffits may cause air recirculation in a corner area even though recommended minimum clearances are maintained. As a guide, locate the unit far enough out so that half of the discharge grille is out from under the soffit.

When placing two or more units side-by-side, provide a minimum of 18 inches between units.

Provide minimum service clearance of 24 inches from control box corner and side service panel.

Refer to Figure 1.

NOTE: Unit must be level | 2 degrees (a inch rise or fall per foot of run) or compressor may not function properly.

A. GROUND LEVEL INSTALLATION

The unit must be level and supported above grade by beams, platform, or a pad. Platform or pad can be of open or solid construction but should be of permanent materials such as concrete, bricks, blocks, steel, or pressure- treated timbers approved for ground contact. Soil conditions must be considered so that the platform or pad does not shift or settle and leave the unit partially supported. Minimum pad dimensions are shown in Figure 2.

If beams or an open platform are used for support, it is recommended that the soil be treated or area be graveled to reduce the growth of grasses and weeds.

To minimize vibration or noise transmission, it is recommended that supports not be in contact with the building structure. However, slabs on grade constructions with an extended pad are normally acceptable.

!CAUTION

PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in proper??? ty damage.

Top surface of platform must be above estimated snowfall level to prevent snow blocking coil and to allow water melt to drain from unit.

C. FASTENING UNIT DOWN

If conditions or local codes require the unit be attached in place, remove the knockouts in the base pan and install tie down bolts through the holes (refer to Figure 2).

Contact local distributor for hurricane hold-down details and the P.E. (Professional Engineer) certification, when required.

!CAUTION

PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in proper??? ty damage.

Inadequate unit support may cause excessive vibration, noise, and/or stress on the refrigerant lines, leading to refrigerant line failure.

a??? dia. Tie Down Knockouts In Base Pan (2 places)

VIEW

FROM

TOP

Base

Pan

B. ROOF TOP INSTALLATION

This type of installation is not recommended on wood frame structures where low noise levels are required.

Supporting structure or platform for the unit must be level. If installation is on a flat roof, locate unit minimum 6 inches above roof level.

Place the unit over one or more load bearing walls. If there are several units, mount them on platforms that are self-supporting and span several load bearing walls. These suggestions are to minimize noise and vibration transmission through the structure. If the structure is a home or apartment, avoid locating the unit over bedrooms or study.

NOTE: When unit is to be installed on a bonded guaranteed roof, a release must be obtained from the building owner to free the installer from all liabilities.

Depth

C

A. COMPONENT MATCHES

Check to see that the proper system components are in place, especially the indoor coil.

R-22 outdoor units can only be used with R-22 specific indoor coils. If there is a refrigerant mis-match, consult the indoor coil manufacturer to determine if a refrigerant conversion kit is available for the indoor coil.

This outdoor unit is designed for use only with indoor coils that utilize a hard shut-off TXV refrigerant metering device. If any other type of metering device is installed on the indoor coil, consult the indoor coil manufacturer to determine if a hard shut-off TXV conversion kit is available.

INSTALLATION INSTRUCTIONS

!CAUTION

PRODUCT DAMAGE HAZARD

Failure to follow this caution may result in product damage.

Indoor coil and outdoor unit must be listed as a certified combination (match) in the ARI Unitary Directory of Certified Products.

Indoor coil must have R-22 specific, hard shut-off TXV refrigerant metering device.

When installing a hard shut-off TXV on an indoor coil, follow the instructions provided with the new TXV.

A typical hard shut-off TXV installation is shown in Figure 3.

INDOOR

COIL

EQUALIZER

TUBE

LIQUID

TUBE

HARD

SHUT-OFF

TXV

SENSING BULB

3-phase R-22 Split System Heat Pump

B. REFRIGERANT LINE SETS

The refrigerant line set must be properly sized to assure maximum efficiency and proper oil circulation. Select line set tube diameters as specified in Figure 4.

NOTE: If the line set actual length is to exceed 80 feet, or if there is more than 20 feet vertical separation between outdoor and indoor units, refer to the Long Line Application Guidline document for additional instructions.

NOTE: Line set actual length must not exceed 200 feet.

NOTE: A crankcase heater must be used when the refrigerant line length exceeds 80 feet.

If it is necessary to add refrigerant line in the field, use dehydrated or dry, sealed, deoxidized, copper refrigeration tubing. Do not use copper water pipe.

Do not remove rubber plugs or caps from copper tubing until connections are ready to be made.

Be extra careful when bending refrigeration tubing. Tubing can ???kink??? easily, and if this occurs, the entire length of tubing must be replaced.

!WARNING

PERSONAL INJURY HAZARD

Failure to follow this warning could result in per??? sonal injury and/or death.

Relieve pressure and recover all refrigerant before servicing existing equipment, and before final unit disposal. Use all service ports and open all flow-??? control devices, including solenoid valves.

!CAUTION

UNIT OPERATION HAZARD

Failure to follow this caution may result in improp??? er product operation.

Do not leave system open to atmosphere any lon??? ger than absolutely required for installation. Inter??? nal system components - especially refrigerant oils - are extremely susceptible to moisture con??? tamination. Keep ends of tubing sealed during installation until the last possible moment.

INSTALLATION INSTRUCTIONS

C.ROUTING AND SUSPENDING REFRIGERANT

LINES

Run refrigerant lines as straight and direct as possible, avoiding unnecessary bends and turns. Always insulate the entire suction line. Both lines should be insulated when routed through an attic or when routed through an underground raceway.

When routing refrigerant lines through a foundation or wall, do not allow refrigerant lines to come in direct contact with the building structure. Make openings large

3-phase R-22 Split System Heat Pump

enough so that lines can be wrapped with extra insulation. Fill all gaps with RTV caulk. This will prevent noise transmission between the tubing and the foundation or wall.

Along floor or ceiling joists, suspend refrigerant lines so that they do not contact the building structure, water pipes, or ductwork. Use insulated or suspension type hangers. Metal straps must be at least 1??? wide to avoid cutting into the tube insulation. Keep the liquid and suction lines separate. Refer to Figure 5.

!CAUTION

UNIT OPERATION HAZARD

Failure to follow this caution may result in improp??? er product operation.

Do not bury more than 36??? of line set underground. Refrigerant may migrate to cooler buried section during extended periods of unit shut-down, caus??? ing refrigerant slugging and possible compressor damage at start-up.

If ANY section of the line set is buried under??? ground, provide a minimum 6??? vertical rise at the service valve.

D. OUTDOOR UNIT HIGHER THAN INDOOR UNIT

Proper oil return to the compressor should be maintained with suction gas velocity. If velocities drop below 1500 fpm (feet per minute), oil return will be decreased. To maintain suction gas velocity, do not upsize vertical suction risers. Use the ???<80 feet??? suction line sizes shown Figure 4.

Install oil traps every 20 feet of vertical suction line riser (refer to Figure 6).

NOTE: If there is more than 20 feet vertical separation between outdoor and indoor units, refer to the Long Line Application Guidline document for additional instructions.

3??? Min.

20 ft.

20 ft.

E. LIQUID LINE FILTER-DRIER

Outdoor units are shipped with an appropriate filter-drier for installation in the liquid line. Leave the plugs in the tube ends until the filter-drier is installed. The optimal location for the filter-drier is close to the indoor coil. Heat pump filter-driers are ???bi-flow??? type. Either end can be pointed towards indoor coil. Refer to Figure 7.

INSTALLATION INSTRUCTIONS

F. SERVICE VALVES

Service valves are closed and plugged from the factory. Outdoor units are shipped with a refrigerant charge sealed in the unit. Leave the service valves closed until all other refrigeration system work is complete or the charge will be lost. Leave the plugs in place until line set tubing is ready to be inserted.

Heat pumps require a piston metering device in the liquid service valve for proper heating operation. Piston and retainer are shipped in the piston body of the liquid service valve, temporarily held in place with a plastic cap. Do not remove the plastic cap until line set tubing is ready to be installed.

Refer to Figure 8 and follow these steps for piston installation:

1.Remove plastic cap holding piston and retainer in piston body of liquid service valve.

2.Check that piston size (stamped on side of piston) matches with number listed on unit rating plate. Return piston to piston body of liquid service valve (either direction).

Return retainer to piston body.

NOTE: Small end of retainer fits inside piston body, with O-ring sealing against inside of piston body

3.Find plastic bag taped to unit containing copper adapter tube with brass nut.

4.Install adapter tube against retainer and thread

brass nut onto liquid service valve. Tighten nut finger tight, then wrench additional ?? turn only.

3-phase R-22 Split System Heat Pump

Service valve bodies are brass and suction tube stub is copper.

PISTON BODY

LIQUID

SERVICE

VALVE

PISTON

PISTON RETAINER

BRASS NUT

SWEAT/FLARE ADAPTER TUBE

G. BRAZING CONNECTIONS

!WARNING

FIRE HAZARD

Failure to follow this warning could result in per??? sonal injury, death, and/or property damage.

Refrigerant and oil mixture could ignite and burn as it escapes and contacts brazing torch. Make sure the refrigerant charge is properly removed from both the high and low sides of the system be??? fore brazing any component or lines.

Clean line set tube ends with emery cloth or steel brush. Remove any grit or debris.

Insert line set tube ends into service valve tube stubs.

Apply heat absorbing paste or heat sink product between service valve and joint. Wrap service valves with a heat sinking material such as a wet cloth.

Braze joints using a Sil-Fos or Phos-copper alloy.

!CAUTION

PRODUCT DAMAGE HAZARD

Failure to follow this caution may result in product damage.

Braze with Sil-Fos or Phos-copper alloy on cop??? per-to-copper joints and wrap a wet cloth around rear of fitting to prevent damage to TXV.

INSTALLATION INSTRUCTIONS

H. EVACUATING LINE SET AND INDOOR COIL

The unit is shipped with a factory refrigerant charge. The liquid line and suction line service valves have been closed after final testing at the factory. Do not disturb these valves until the line set and indoor coil have been evacuated and leak checked, or the charge in the unit may be lost.

NOTE: Do not use any portion of the factory charge for purging or leak testing. The factory charge is for filling the system only after a complete evacuation and leak check has been performed.

!CAUTION

PRODUCT DAMAGE HAZARD

Failure to follow this caution may result in product damage.

Never use the outdoor unit compressor as a vacu??? um pump. Doing so may damage the compressor.

Line set and indoor coil should be evacuated using the recommended deep vacuum method of 500 microns. If deep vacuum equipment is not available, the alternate triple evacuation method may be used by following the specified procedure.

If vacuum must be interrupted during the evacuation procedure, always break vacuum with dry nitrogen.

Deep Vacuum Method

The deep vacuum method requires a vacuum pump capable of pulling a vacuum to 500 microns and a vacuum gauge capable of accurately measuring this vacuum level. The deep vacuum method is the most positive way of assuring a system is free of air and water.

Watch the vacuum gauge as the system is pulling down. The response of the gauge is an indicator of the condition of the system (refer to Figure 9).

With no leaks in the system, allow the vacuum pump to run for 30 minutes minimum at the deep vacuum level.

3-phase R-22 Split System Heat Pump

Triple Evacuation Method

The triple evacuation method should only be used when system does not contain any water in liquid form and vacuum pump is only capable of pulling down to 28 inches of mercury. Refer to Fig. 10 and proceed is as follows:

1.Pull system down to 28 inches of mercury and allow pump to continue operating for an additional 15 minutes.

2.Close manifold valves or valve at vacuum pump and shut off vacuum pump.

3.Connect a nitrogen cylinder and regulator to system and fill with nitrogen until system pressure is 2 psig.

4.Close nitrogen valve and allow system to stand for 1 hour. During this time, dry nitrogen will diffuse throughout the system absorbing moisture.

5.Repeat this procedure as indicated in Figure 10.

6.After the final evacuate sequence, confirm there are no leaks in the system. If a leak is found, repeat the entire process after repair is made.

I. OPENING SERVICE VALVES

Outdoor units are shipped with a refrigerant charge sealed in the unit. Opening the service valves releases this charge into the system.

NOTE: Open the Suction service valve first. If the Liquid service valve is opened first, oil from the compressor may be drawn into the indoor coil TXV, restricting refrigerant flow and affecting operation of the system.

Remove Suction service valve cap and insert a hex wrench into the valve stem. Hold the valve body steady with an end-wrench and back out the stem by turning the hex wrench counterclockwise. Turn the stem until it just contacts the rolled lip of the valve body.

After the refrigerant charge has bled into the system, open the Liquid service valve.

INSTALLATION INSTRUCTIONS

NOTE: These are not back-seating valves. It is not necessary to force the stem tightly against the rolled lip.

The service valve cap is a primary seal for the valve and must be properly tightened to prevent leaks. Make sure cap is clean and apply refrigerant oil to threads and sealing surface on inside of cap.

3-phase R-22 Split System Heat Pump

Tighten cap finger tight and then tighten additional 6 of a turn (1 wrench flat) to properly seat the sealing surfaces.

J. GAUGE PORTS

Check for leaks at the schrader ports and tighten valve cores if necessary. Install plastic caps finger tight.

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in per??? sonal injury or death.

Before installing, modifying or servicing system, turn OFF the main (remote) electrical disconnect device. There may be more than one disconnect device.

Refer to unit rating plate for the required supply voltage. Depending on the model, required supply voltage will be:

208/230 V, 3-phase, 60 Hz.

or

460 V, 3-phase, 60 Hz.

Outdoor units are approved for use with copper conductors only. Do not use aluminum wire.

Refer to unit rating plate for minimum circuit ampacity and circuit protection requirements.

Grounding

Permanently ground unit in accordance with the National Electrical Code and local codes or ordinances. Use a copper conductor of the correct size from the grounding lug in control box to a grounded connection in the service panel or a properly driven and electrically grounded ground rod.

Supply Voltage Wiring Connections

Make all outdoor electrical supply (Line Voltage) connections with raintight conduit and fittings. Most codes require a disconnect switch outdoors within sight of the unit. Consult local codes for special requirements.

Route electrical supply (Line Voltage) wiring through knockout hole in bottom of Control Box.

Connect two power wires to Contactor and one power wire to Blue lead wire (use wire nut). Connect ground wire to Ground Lug. Refer to Wiring Diagram on unit and Figure 11.

Phase Monitor Relay Board

The Phase Monitor Board detects the sequence of the three phase electrical system, and a relay breaks the Y (call for cooling) control signal if the phasing is incorrect. Additionally, the board will detect the loss of voltage on any of the three phase inputs and break the Y signal in the same way.

An LED on the board displays the following status: Red LED ON - Normal function, relay contact closed.

Red LED Blinking - Abnormal function, relay contact open.

Red LED OFF - No 24 VAC control power present at board.

NOTE: Units with Comfort Alertt Diagnostics device have phase monitor feature built in.

Figure 12 Phase Monitor Relay Board

INSTALLATION INSTRUCTIONS

Thermostat Wiring Connections

Route thermostat wiring through rubber grommet in bottom of Control Box. Low voltage lead wires are provided in the control box for connection to thermostat wires (use wire nuts). Refer to Wiring Diagram on unit and Figure 13 for low voltage wiring examples.

3-phase R-22 Split System Heat Pump

NOTE: Use No. 18 AWG (American Wire Gage) color-coded, insulated (35 ??C minimum) wire. If thermostat is located more than 100 feet (30.5 m) from unit as measured along the control voltage wires, use No. 16 AWG color-coded wires to avoid excessive voltage drop.

A. DEFROST THERMOSTAT

The defrost thermostat is factory installed on a short tube stub extending from the coil end plate. Refer to Figure 14 and confirm that the thermostat is securely fastened in place on the tube stub.

FEEDER TUBE

TUBE STUB

COIL

DEFROST

THERMOSTAT

B. DEFROST CONTROL BOARD

The defrost board is a time/temperature control which includes a field-selectable time period between defrost cycles of 30, 60, or 90 minutes (quick-connects located at board edge, factory set at 90 minutes).

Defrost mode is identical to cooling mode except that outdoor-fan motor stops and second-stage heat is turned on to continue warming conditioned space.

Initially, the defrost cycle timer starts when the contactor is energized and a 24 VAC signal is present on the T1 terminal. Then the defrost cycle begins when the defrost thermostat is closed and the cycle timer times out (30, 60, 90 or minutes).

To initiate a forced defrost cycle, the defrost thermostat must be closed. This can be accomplished as follows:

1.Turn off power to outdoor unit.

2.Disconnect outdoor fan-motor lead from OF2 on control board (refer to Figure 15). Tape lead to prevent grounding.

3.Restart unit in heating mode, allowing frost to accumulate on outdoor coil.

4.After a few minutes in heating mode, liquid line temperature should drop below closing point of defrost thermostat (approximately 32 ??F).

5.Short between speed-up terminals with a flat-bladed screwdriver (refer to Figure 15). This reduces the timing sequence to 7, 14, or 21 seconds (30, 60, or 90 minute defrost selection, respectively).

6.When you hear reversing valve change position, remove screwdriver immediately; otherwise, control will terminate normal 10-minute defrost cycle in approximately 2 seconds.

NOTE: Length of defrost cycle is dependent upon length of time it takes to remove screwdriver from test pins after reversing valve has shifted.

7.Unit will remain in defrost for remainder of defrost-cycle time or until defrost thermostat reopens at approximately 65 ??F coil temperature of liquid line.

8.Turn off power to outdoor unit and reconnect fan-motor lead to OF2 on control board (refer to Figure 15).

1.Set indoor thermostat selector switch to OFF.

2.Turn ON all electrical disconnect devices.

3.If unit has a crankcase heater, energize the heater and wait 24 hours before proceeding.

4.Set indoor thermostat at desired temperature. Be sure setpoint is below indoor ambient temperature to call for cooling, or above indoor ambient to call for heating.

5.Set indoor thermostat selector switch to COOL or HEAT. Operate unit for minimum 10 minutes, then check the system refrigerant charge.

Check For Proper Phasing

Observe the LED on the Phase Monitor Relay Board. If the LED is blinking, turn off power to the unit and swap any two of the supply voltage wires. Turn power back on and repeat the start-up procedure.

A. COOLING MODE

Outdoor units are shipped with a refrigerant charge to match a specific indoor coil and 15 feet of refrigerant line. If shorter or longer refrigerant lines or a different indoor coil are used, the charge will have to be adjusted.

For different line lengths, add or remove charge based on 0.6 ounces charge per foot of difference. For example, a 25 foot line set is 10 feet longer than the specified 15 feet. Add 0.6 ounces charge for each of the extra 10 feet:

10 x 0.6 = 6.0 ounces additional charge

This outdoor unit is designed for use only with indoor coils that utilize a hard shut-off TXV refrigerant metering device. With a hard shut-off indoor TXV, use the subcooling method to make final charge adjustments:

1.Operate unit a minimum of 10 minutes before checking charge.

NOTE: If outdoor unit has a 2-speed fan motor,

motor will operate in low speed when outdoor ambient temperature is below 82 ??F. Pull one of the yellow low voltage wires off the fan control and the unit will default to high speed fan for servicing. Reconnect wire after servicing.

2.Measure liquid service valve pressure by attaching an accurate gauge to service port.

3.Measure liquid line temperature by attaching an accurate thermistor type sensor or electronic thermometer to liquid line near outdoor coil.

4.Refer to unit rating plate for required subcooling temperature.

5.Refer to Figure 16. Find the required liquid line temperature where the rating plate subcooling temperature intersects measured liquid service valve pressure.

6.If the measured liquid line temperature is higher than the chart number, add refrigerant to lower the measured temperature.

NOTE: When adding refrigerant, charge in liquid form, using a flow restricting device, into the suction port.

If the measured liquid line temperature is lower than the chart number, reclaim refrigerant to raise

the measured temperature. Tolerance is | 3 ??F.

B.HEATING MODE

To check system operation during heating cycle, refer to the Tech Label on outdoor unit. This chart indicates whether a correct relationship exists between system operating pressure and air temperature entering indoor and outdoor units. If pressure and temperature do not match on chart, system refrigerant charge may not be correct. Do not use chart to adjust refrigerant charge.

NOTE: When charging is necessary during heating season, charge must be weighed in accordance with unit rating plate ??0.6 ounces per foot of a inch liquid line above or below 15 feet respectively.

On a call for cooling, the thermostat makes circuits R-O, R-Y, and R-G. Circuit R-O energizes reversing valve, switching it to cooling position. Circuit R-Y energizes contactor, starting outdoor fan motor and compressor. Circuit R-G energizes indoor unit blower relay, starting indoor blower motor.

When thermostat is satisfied, its contacts open, de-energizing contactor and blower relay. Compressor and motors stop.

NOTE: If indoor unit is equipped with a time-delay relay circuit, the blower runs an additional length of time to increase system efficiency. (Applies to both cooling and heating modes.)

NOTE: Low ambient cooling feature allows unit to operate safely in cooling mode down to 0?? F outdoor ambient.

On a call for heating, the thermostat makes circuits R-Y and R-G (circuit R-O is NOT made, and the reversing valve stays in the de-energized, heating position). Circuit R-Y energizes contactor, starting outdoor fan motor and compressor. Circuit R-G energizes indoor blower relay, starting blower motor. If the room temperature continues to fall, circuit R-W2 is made through the second-stage room thermostat bulb. Circuit R-W2 energizes a sequencer, bringing on the first bank supplemental electric heat and providing electrical potential to the second heater sequencer (if used). If outdoor temperature falls below the setting of the outdoor thermostat (field-installed option), contacts close to complete the circuit and bring on the second bank of supplemental electric heat.

When the thermostat is satisfied, its contacts open, de-energizing contactor, blower relay, and sequencer. Compressor, motors, and heaters stop.

Some models are factory equipped with the Comfort Alertt Diagnostics device in the control box (refer to Figure 17). Comfort Alert provides around-the-clock monitoring for common electrical problems, compressor defects, and broad system faults. If trouble is detected, an alert code is displayed with a flashing LED indicator.

NOTE: Comfort Alert is required for unit operation.

Comfort Alert provides active safety protection and compressor may be shut down. Alert codes are listed in Figures 18 and 19.

Comfort Alert is factory wired and requires no modification. Low voltage lead wires are provided in the control box for connection to thermostat wires (use wire nuts).

The Comfort Alert device operates by monitoring the compressor power leads and the thermostat demand signal (Y terminal). It draws constant 24 VAC power at the R and C terminals.

Compressor Wires

Pass Through Holes (3)

Condensate Drain

During the cooling season, check monthly for free flow of drainage and clean if necessary.

Cleanliness

These tips will help keep the air conditioner looking better and working more efficiently:

1.Free flow of air is essential. Keep fences, shrubs, trash cans, and other obstructions at least 18 inches from all coil inlets.

2.Keep the coil free of grass clippings, leaves, weeds, and other debris.

NOTE: Coil may occasionally require cleaning with a liquid solution. The coil must be cold when cleaning. Use an alkaline based cleaner only. Cleaning a hot coil or using an acid based cleaner will remove the paint from the fins and may clog the coil.

3.Never use a weather cover over the outdoor unit unless it is a ventilated type or made of breathable fabric that will allow moisture to evaporate rapidly. A cover that holds moisture in the unit will cause more rust build-up and damage than normal exposure to weather.