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Installation Instruction

286A / 288A

Evolution

t

Series Heat Pumps with Puron

r

Refrigerant

2 To 5 Nominal Tons (Sizes 024 to 060)

NOTE

: Read the entire instruction manual before starting the

installation.
Unless otherwise noted, information in these installation

instructions pertain to both 286A and 288A series units.

Information that is unique to the 286A series will be identified as
such; likewise information that is unique to the 288A series will

also be identified.

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance,

or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property

damage. Consult a qualified installer, service agency, or your

distributor or branch for information or assistance. The qualified
installer or agency must use factory--authorized kits or accessories

when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,

and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions

thoroughly and follow all warnings or cautions included in
literature and attached to the unit. Consult local building codes and

current editions of the National Electrical Code ( NEC ) NFPA 70.
In Canada, refer to current editions of the Canadian electrical code

CSA 22.1.

Recognize safety information. This is the safety--alert symbol

!

!

When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury. Understand

these signal words; DANGER, WARNING, and CAUTION. These
words are used with the safety--alert symbol. DANGER identifies

the most serious hazards which

will

result in severe personal injury

or death. WARNING signifies hazards which

could

result in

personal injury or death. CAUTION is used to identify unsafe

practices which

would

result in minor personal injury or product

and property damage. NOTE is used to highlight suggestions

which

will

result in enhanced installation, reliability, or operation.

CUT HAZARD

Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and

wear appropriate protective clothing and gloves when handling

parts.

CAUTION

!

Indoor Thermostat Control Options

Model

Evolution

Control

Standard

2---stage

Thermostat

286A

Yes

Yes

288A

Yes

Yes*

* Units containing circuit board HK38EA015 or newer.

!

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal

injury or death.
Before installing, modifying, or servicing system, main

electrical disconnect switch must be in the OFF position

and install a lockout tag. There may be more than 1

disconnect switch. Lock out and tag switch with a

suitable warning label.

!

WARNING

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could result in personal injury

or equipment damage.
Puron

R

refrigerant systems operate at higher pressures than

standard R--22 systems. Do not use R--22 service equipment

or components on Puron

R

refrigerant equipment.

Summary of Contents for Evolutiont 286A

Page 1: ...rmation This is the safety alert symbol When you see this symbol on the unit and in instructions or manuals be alert to the potential for personal injury Understand these signal words DANGER WARNING and CAUTION These words are used with the safety alert symbol DANGER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies hazards which could resul...

Page 2: ...nt tubing sets metering device and filter drier listed in presale literature There can be no deviation Consult the Service Manual Air Conditioners and Heat Pumps Using Puron Refrigerant to obtain required unit changes for specific applications and for R 22 retrofit Check Equipment and Job Site Unpack Unit Move to final location Remove carton taking care not to damage unit Inspect Equipment File cl...

Page 3: ...outdoor unit Make Piping Connections WARNING PERSONAL INJURY AND UNIT DAMAGE HAZARD Failure to follow this warning could result in personal injury or death Relieve pressure and recover all refrigerant before system repair or final unit disposal Use all service ports and open all flow control devices including solenoid valves CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in e...

Page 4: ...rd with Evolution Control Low Ambient not allowed with non communicating thermostat No No Compressor Start Assist Capacitor and Relay Standard on 286A models Not required for 288A Standard on 286A models Not required for 288A Standard on 286A models Not required for 288A Low Ambient Control Standard with Evolution Control Low ambient not allowed with non communicating thermostat No No Support Feet...

Page 5: ...rant Tubing and Indoor Coil CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation Never use the system compressor as a vacuum pump Refrigerant tubes and indoor coil should be evacuated using the recommended deep vacuum method of 500 microns The alternate triple evacuation method may be used See Service Manual for triple evacuation method Alw...

Page 6: ...nstructions packaged with kits or accessories when installing Make Airflow Selections Airflow Setup for Evolution Control Furnace of FE Fan coil communicating When using an Evolution User Interface airflow is automatically selected based on equipment size See User Interface Installation Instructions for available adjustments Airflow Selection for Variable Speed Furnaces for Non Communicating non E...

Page 7: ...mand high stage cooling is energized by the second stage of indoor thermostat or User Interface After second stage is satisfied the unit returns to low stage operation until first stage is satisfied or until second stage is required again When both first stage and second stage cooling are satisfied the compressor will shut off The reversing valve will remain energized until the control board power...

Page 8: ...put for both high and low stage equals the value for low stage opera tion below 55_F 12 8_C Time Delays The unit time delays include S Five minute time delay to start cooling or heating operation when there is a call from the thermostat or user interface To bypass this feature momentarily short and release Forced Defrost pins S Five minute compressor re cycle delay on return from a brown out condi...

Page 9: ...odels the PWM output for both high and low stage equals the value for low stage operation below 55_F 12 8_C Defrost This control offers 5 possible defrost interval times 30 60 90 120 minutes or AUTO These are selected by dip switches on the unit control board or by the Evolution Control User Interface The Evolution Control selection overrides the control board dip switch settings AUTO defrost adju...

Page 10: ...e solenoid should be installed near the outdoor unit with the arrow facing the outdoor unit This is the direction of flow control See application manual for long line application details Accessory Liquid Solenoid with Evolution Communicating Control When using the Evolution Control the liquid line solenoid output is provided at the Y1 connection Connect the solenoid as shown in the wiring label di...

Page 11: ...and serial information If the factory control board fails the model plug must be transferred from the original board to the replacement board for the unit to operate NOTE The model plug takes priority over factory model information input at the factory If the model plug is removed after initial power up the unit will operate according to the last valid model plug installed and flash the appropriat...

Page 12: ...t sensed when the compressor should be starting the appropriate contactor may be stuck open or there is a wiring error The control will flash the appropriate fault code Check the contactor and control box wiring 286A Models Only Compressor Start Detection on Models with Bristol Compressors Only In low stage if the specified start voltage at VR terminal is not achieved the start relay is de energiz...

Page 13: ... performed during low ambient cooling or defrost operation Failed Thermistor Default Operation Factory defaults have been provided in the event of failure of outdoor air thermistor OAT and or outdoor coil thermistor OCT If the OAT sensor should fail low ambient cooling will not be allowed and the one minute outdoor fan off delay will not occur Defrost will be initiated based on coil temperature an...

Page 14: ...relay and capacitor held in circuit too long if installed High Stage Thermal Cutout 72 Compressor operation detected then disappears while high stage demand exists Possible causes are internal compressor overload trip or start relay and capacitor held in circuit too long if installed Contactor Shorted 73 Compressor voltage sensed when no demand for compressor operation exists Contactor may be stuc...

Page 15: ... W1 W2 Heat Cool Stage 1 Y1 W2 Y1 Heat Cool Stage 2 Y Y2 Y Y2 Y Y2 Fan G G 24VAC Hot Heating Rh R R 24VAC Hot Cooling Rc Dry Contact 1 D1 Dry Contact 2 D2 DHUM 24VAC Common C COM C Humidify HUM Outdoor Air Temp OAT Remote Room Sensor RRS OAT RRS Com SRTN Outdoor Sensor Humidifier Solenoid Valve Remote Room Sensor Variable Speed Furnace Thermidistat 2 Stage Heat Pump Indicates connection may not be...

Page 16: ...e hoses with 700 psig service pressure rating 12 Leak detectors should be designed to detect HFC refrigerant 13 Puron refrigerant as with other HFCs is only compatible with POE oils 14 Vacuum pumps will not remove moisture from oil 15 Do not use liquid line filter driers with rated working pressures less than 600 psig 16 Do not leave Puron refrigerant suction line filter driers in line longer than...

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