Bryant 286A User Manual

286A / 288A
Evolutiont Series Heat Pumps with Puronr Refrigerant
2 To 5 Nominal Tons (Sizes 024 to 060)

Installation Instruction

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.

Indoor Thermostat Control Options

Model

286A Yes Yes

288A Yes Yes*

* Units containing circuit board HK38EA015 or newer.

!

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.

!

!

!

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could result in personal injury
or equipment damage.

PuronR refrigerant systems operate at higher pressures than
standard R--22 systems. Do not use R--22 service equipment
or components on PuronR refrigerant equipment.

Evolution

Control

WARNING

WARNING

Standard

2 --- s ta g e

Thermostat

!

CAUTION

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.

INSTALLATION RECOMMENDATIONS

NOTE: In some cases noise in the living area has been traced to

gas pulsations from improper installation of equipment.

1. Locate unit away from windows, patios, decks, etc. where
unit operation sound may disturb customer.

2. Ensure that vapor and liquid tube diameters are appropriate
for unit capacity.

3. Run refrigerant tubes as directly as possible by avoiding un­necessary turns and bends.

4. Leave some slack between structure and unit to absorb vi­bration.

5. When passing refrigerant tubes through the wall, seal open­ing with RTV or other pliable silicon --based caulk. (See Fig.

1.)

6. Avoid direct tubing contact with water pipes, duct work,
floor joists, wall studs, floors, and walls.

7. Do not suspend refrigerant tubing from joists and studs with
a rigid wire or strap which comes in direct contact with
tubing.(See Fig. 1.)

8. Ensure that tubing insulation is pliable and completely sur­rounds vapor tube.

286A / 288A

9. When necessary, use hanger straps which are 1 in. wide and
conform to shape of tubing insulation. (See Fig. 1.)

10. Isolate hanger straps from insulation by using metal sleeves
bent to conform to shape of insulation.

When outdoor unit is connected to factory--approved indoor unit,
outdoor unit contains system refrigerant charge for operation with
ARI rated indoor unit when connected by 15 ft. (4.57 m) of
field--supplied or factory accessory tubing. For proper unit
operation, check refrigerant charge using charging information
located on control box cover and/or in the Check Charge section of
this instruction.

IMPORTANT: Maximum liquid-- line size is 3/8--in. OD for all
residential applications including long line applications.

IMPORTANT: Always install the factory--supplied liquid--line
filter drier. Obtain replacement filter driers from your distributor or
branch.

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 claim with shipping company prior to installation if shipment
is damaged or incomplete. Locate unit rating plate on unit corner
panel. It contains information needed to properly install unit.
Check rating plate to be sure unit matches job specifications.

Install on a Solid, Level Mounting Pad

If conditions or local codes require the unit be attached to pad, tie
down bolts should be used and fastened through knockouts
provided in unit base pan. Refer to unit mounting pattern in Fig. 2
to determine base pan size and knockout hole location.

For hurricane tie downs, contact distributor for details and PE
(Professional Engineer)Certification, if required.

On rooftop applications, mount on level platform or frame. Place
unit above a load-- bearing wall and isolate unit and tubing set from
structure. Arrange supporting members to adequately support unit
and minimize transmission of vibration to building. Consult local
codes governing rooftop applications.

Roof mounted units exposed to winds above 5 mph may require
wind baffles. Consult the Service Manual -- Residential Split
System Air Conditioners and Heat Pumps Using Puron®
Refrigerant for wind baffle construction.

INSTALLATION

Avoid contact between tubing and structureNOTE:

OUTDOOR WALL

CAULK

INSULATION

HANGER STRAP

(AROUND VAPOR

TUBE ONLY)

1” (25.4 mm) MIN.

THROUGH THE WALL

INDOOR WALL

SUSPENSION

LIQUID TUBE

VAPOR TUBE

JOIST

INSULATION

VAPOR TUBE

LIQUID TUBE

A94028

Fig. 1 -- Connecting Tube Installation

Specifications for this unit in residential new construction market
require the outdoor unit, indoor unit, refrigerant 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

UNIT BASE PAN

DIMENSIONS

in. (mm)

36--- 1/2 x 40

(927.1x1016)

TIEDOWN KNOCKOUT LOCATIONS

A B C

11--- 5/8

(295.3)

in. (mm)

6--- 13/16

(173.0)

28--- 3/4

(730.3)

A05242

Fig. 2 -- Tiedown Knockout Locations

NOTE: Unit must be level to within ±2° (±3/8 in./ft. / ±9.53

mm/m) per compressor manufacturer specifications.

Clearance Requirements

When installing, allow sufficient space for airflow clearance,
wiring, refrigerant piping, and service. Allow 24 in. (610 mm)
clearance to service end of unit and 48 in. (1219.2 mm) above unit.
For proper airflow, a 6 in. (152.4 mm) clearance on 1 side of unit
and 12 in. (304.8 mm) on all remaining sides must be maintained.
Maintain a distance of 24 in. (609.6 mm) between units. Position
so water, snow, or ice from roof or eaves cannot fall directly on
unit.

On rooftop applications, locate unit at least 6 in. (152.4 mm) above
roof surface.

2

Operating Ambient

The minimum outdoor operating ambient in cooling mode is
55_F/12.78_C without low ambient cooling enabled, and the
maximum outdoor operating ambient in cooling mode is
125_F/51.67_C. On Evolution communicating systems only (for
both 286A and 288A), low ambient cooling is available to
0_F/--17.78_C.

The maximum outdoor operating ambient in heating mode is
66°F/18.89_C on all models.

Elevate Unit

Make Piping Connections

!

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.

WARNING

!

UNIT OPERATION HAZARD

Failure to follow this caution may result in equipment
damage or improper operation.

Do not allow water and/or ice to build up in base pan.

Elevate unit per local climate and code requirements to provide
clearance above estimated snowfall level and ensure adequate
drainage of unit.

!

UNIT OPERATION HAZARD

Failure to follow this caution may result in equipment
damage or improper operation.

Locate the unit in such a way that it is stable in all
circumstances including adverse weather conditions.

CAUTION

CAUTION

In Long--Line Applications, Install Liquid--Line
Solenoid Valve (LSV)

For refrigerant piping arrangements with equivalent lengths greater
than 80 ft. (24.38 m) and/or when elevation difference between
indoor and outdoor unit is greater than ±20 ft. (±6.10 m), follow
all requirements of the Residential Piping and Longline Guideline.
If required by Long--Line Guideline, install LSV kit, part no.
KHALS0401LLS, specifically designed for PuronR refrigerant
heat pumps. LSV should be installed within 2 ft. (0.61 m) of
outdoor unit with flow arrow pointing toward outdoor unit. Follow
the Installation Instructions included with accessory kit.

IMPORTANT: Flow arrow must point toward outdoor unit.

!

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment
damage or improper operation.

Do not leave system open to atmosphere any longer than
minimum required for installation. POE oil in compressor is
extremely susceptible to moisture absorption. Always keep
ends of tubing sealed during installation.

!

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment
damage or improper operation.

If ANY refrigerant tubing is buried, provide a 6 in. vertical
rise at service valve. Refrigerant tubing lengths up to 36 in.
(914.4 mm) may be buried without further special
consideration. Do not bury lines longer than 36 in. (914.4
mm).

Outdoor units may be connected to indoor section using accessory
tubing package or field --supplied refrigerant grade tubing of correct
size and condition. For tubing requirements beyond 80 ft. (24.38
m), substantial capacity and performance losses can occur.
Following the recommendations in the Residential Piping and
Longline Guideline will reduce these losses. Refer to Table 1 for
field tubing diameters. Refer to Table 2 for accessory requirements.

CAUTION

CAUTION

Outdoor Unit Connected to Factory--Approved Indoor
Unit

Outdoor unit contains correct system refrigerant charge for
operation with factory--approved, ARI--rated indoor unit with
highest sales volume when connected by 15 ft. (4.57 m) of
field--supplied or factory-- accessory tubing, and factory--supplied
filter drier. Check refrigerant charge for maximum efficiency.

286A / 288A

3

Table 1 – Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (in.)

Information is Specific to 286A and 288A Models

LIQUID RATED VAPOR*

UNIT SIZE

286A024 3/8 3/8 5/8 5/8

286A036 3/8 3/8 3/4 3/4

286A048 3/8 3/8 7/8 7/8

286A060 3/8 3/8 7/8 1--1/8

Connection

Diameter

Tube

Diameter

Connection

Diameter

Tube

Diameter

288A024

288A036

288A048

288A060

* Units are rated with 25 ft. (7.6 m) of lineset. See Product Data sheet for performance data when using different size and length linesets.
Notes:

1. Do not apply capillary tube or th e fixed orifice indoor coils to these u nits.
2 For Tubing Set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 20 ft. (6.10 m) vertical differential ( 250 ft./76.2 m Total Equivalent Length),

refer to the Residential Piping and Long Line Guideline for Air Conditioners and Heat Pumps using Puron® Refrigerant.

3/8 3/8 3/4 3/4

3/8 3/8 3/4 3/4

3/8 3/8 7/8 7/8

3/8 3/8 7/8 1--1/8

Table 2 – Accessory Usage

286A / 288A

ACCESSORY

Crankcase Heater Standard

Evaporator Freeze Protection

Winter Start Control

Compressor Start Assist Capacitor

and Relay}

Low--- Ambient Control

Support Feet Recommended No Recommended

Liquid--- Line Solenoid Valve No

Puron Refrigerant Balance Port

H a r d --- S h u t O f f T X V

* For tubing set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 20 ft. (6.10 m) vertical differential (total equivalent length), refer to the

Residential Piping and Long Line Guideline for Air Conditioners and Heat Pumps using Puron® Refrigerant.

{ Required on all indoor units. Standard on all new Puron refrigerant fan coils and furnace coils.
} Information is specific to 286A and 288A models.

REQUIRED FOR LOW---AMBIENT

COOLING APPLICATIONS

(Below 55°F/12.8_C)

Standard with Evolutiont Control

(Low Ambient not allowed with
non---communicating thermostat)
Standard with Evolution Control

(Low Ambient not allowed with non ---

communicating thermostat)

Standard on 286A models.

Not required for 288A

Standard with Evolution Control

(Low ambient not allowed with non ---

communicating thermostat)

Ye s {

REQUIRED FOR LONG LINE

APPLICATIONS*

Standard

No No

No No

Standard on 286A models.

Not required for 288A

No No

Yes

Ye s {

REQUIRED FOR SEA COAST

APPLICATIONS

(Within 2 miles/3.22 km)

Standard

Standard on 286A models

Not required for 288A

No

Ye s {

the environmentally sound refrigerant

ISO 9001:2000

REGISTERED

Ready for use in a Hybrid Heatr Duel Fuel system.

4

This produ ct has been desi gned and manuf actured t o
meet Energy Star® crit eria for energy efficiency when
matched with appropriate coil components. However,
proper refr igerant c harge and proper ai r flo w are crit ical
to achieve rated capacity and effi ciency. Installation of
this product should follow all manufacturing refrigerant
charging and air flow instructions. Failure to confirm

proper charge and air flow may reduce energy
efficiency and shorten equipment life.

Install Liquid--Line Filter Drier Indoor

Refer to Fig. 3 and install filter drier as follows:

1. Braze 5--in. (127 mm) liquid tube to the indoor coil.

2. Wrap filter drier with damp cloth.

3. Braze filter drier to above 5-- in. (127 mm) liquid tube. Flow
arrow must point towards indoor coil.

4. Connect and braze liquid refrigerant tube to the filter drier.

!

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage
or improper operation.

Installation of filter drier in liquid line is required.

CAUTION

A05227

Fig. 3 -- Liquid--Line Filter Drier

Refrigerant Tubing connection Outdoor

Connect vapor tube to fitting on outdoor unit vapor service valves
(see Table 1).

Install Adapter Tube

1. Remove plastic retainer holding outdoor piston in liquid
service valve.

2. Check outdoor piston size with matching number listed on
unit rating plate.

3. Locate plastic bag taped to unit containing adapter tube.

4. Remove TeflonR washer from bag and install on open
end of liquid service valve.

5. Remove adapter tube from bag and connect threaded nut to
liquid service valve. Tighten nut finger tight and then with
wrench tighten an additional 1/2 turn (15 ft--lb).

DO NOT OVER TIGHTEN!

Sweat Connections

!

CAUTION

Evacuate Refrigerant Tubing and Indoor Coil

!

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. Always break a vacuum with dry
nitrogen.

CAUTION

Deep Vacuum Method

The deep vacuum method requires a vacuum pump capable of
pulling a vacuum of 500 microns and a vacuum gauge capable of
accurately measuring this vacuum depth. The deep vacuum method
is the most positive way of assuring a system is free of air and
liquid water. (See Fig. 4)

5000
4500
4000
3500
3000
2500
2000

MICRONS

1500
1000

500

01234567

Fig. 4 -- Deep Vacuum Graph

MINUTES

LEAK IN
SYSTEM

VACUUM TIGHT
TOO WET

TIGHT
DRY SYSTEM

A95424

Final Tubing Check

IMPORTANT: Check to be certain factory tubing on both indoor

and outdoor unit has not shifted during shipment. Ensure tubes are
not rubbing against each other or any sheet metal. Pay close
attention to feeder tubes, making sure wire ties on feeder tubes are
secure and tight.

Make Electrical Connections

!

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal
injury or death.

Do not supply power to unit with compressor terminal box
cover removed.

WARNING

286A / 288A

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment
damage or improper operation.

S Use a brazing shield
S Wrap service valves with wet cloth or heat sink material.

Use refrigerant grade tubing. Service valves are closed from factory
and ready for brazing. After wrapping service valve with a wet
cloth, braze sweat connections using industry accepted methods
and materials. Consult local code requirements. Refrigerant tubing
and indoor coil are now ready for leak testing. This check should
include all field and factory joints.

Be sure field wiring complies with local and national fire, safety,
and electrical codes, and voltage to system is within limits shown
on unit rating plate. Contact local power company for correction of
improper voltage. See unit rating plate for recommended circuit
protection device.

NOTE: Operation of unit on improper line voltage constitutes
abuse and could affect unit reliability. See unit rating plate. Do not
install unit in system where voltage may fluctuate above or below
permissible limits.

NOTE: Use copper wire only between disconnect switch and unit.

5