Installation guide

ManualsBrandsCarrier ManualsCentral air conditionerOfficial Carrier heat pump

to the Expertg_

Installation Instruction

NOTE: Read the entire instruction manual before starting the

installation.

Unless otherwise noted, information in these installation

instructions pertain to both 25HNA6 and 25HNA9 series units.

Information that is unique to the 25HNA6 series will be identified

as such; likewise information that is unique to the 25HNA9 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 nmst 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 iniury. 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 iniury

or death. WARNING signifies hazards which could result in

personal iniury or death. CAUTION is used to identify unsafe

practices which would result in nfinor personal iniury or product

and property damage. NOTE is used to highlight suggestions

which will result in enhanced installation, reliability, or operation.

Indoor Thermostat Control Options

Standard

Model Infinity

Control 2-stage

Thermostat

25HNA6 Yes Yes

25HNA9 Yes Yes*

Units containing circuit board HK38EA015or newer.

ELECTRICALSHOCK HAZARD

Failure to follow this warning could result in personal

iniury or death.

Before installing, modifying, or servicing system, main

electrical disconnect switch nmst 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.

[]NIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could result in personal iniury

or equipment damage.

Puron® refrigerant systems operate at higher pressures than

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

or components on Puron® refrigerant equipment.

CUT HAZARD

Failure to follow this caution may result in personal iniury.

Sheet metal parts may have sharp edges or burrs. Use care and

wear appropriate protective clothing and gloves when handling

_arts.

Summary of content (16 pages)

PAGE 1
® to the Expertg_ Installation Instruction NOTE: Read installation. the entire instruction manual before starting the Indoor Control Options Standard Unless otherwise instructions pertain noted, to both information in these 25HNA6 and 25HNA9 installation series units. Information that is unique to the 25HNA6 series will be identified as such; likewise information that is unique to the 25HNA9 series will also be identified.
PAGE 2
INSTALLATION RECOMMENDATIONS NOTE:Insome cases noise in the living area has been traced to gas pulsations from improper installation 3. Run refrigerant necessary turns 4. Leave some bration. 5. When and liquid tube diameters etc. where slack between as possible structure refrigerant by avoiding un- and unit to absorb tubes through vi- the wall, seal open- ing with RTV or other pliable silicon-based 1.) 6. Avoid direct tubing contact with water floor joists, wall studs, floors, and walls.
PAGE 3
Operating Ambient Make Piping The minimum outdoor operating ambient in cooling 55°F/12.78°C without low ambient cooling enabled, maximum outdoor operating ambient in cooling mode is and the mode is 125°F/51.67°C. only On both 25HNA6 0°F/-17.78°C. Infinity and 25HNA9), communicating low ambient The maximum outdoor operating 66°F/18.89°C on all models.
PAGE 4
Table 1 - Refrigerant Connections Information and Recommended is Specific to 25HNA6 Liquid and Vapor 1hbe and 25HNA9 Diameters RATED VAPOR* LIQUID UNIT SIZE Connection Diameter 3/8 5/8 5/8 3/8 3/8 3/4 3/4 25HNA648 3/8 3/8 7/8 7/8 25HNA660 3/8 3/8 7/8 1- 1/8 25HNA924 3/8 3/8 3/4 3/4 25HNA936 3/8 3/8 3/4 3/4 25HNA948 3/8 3/8 7/8 7/8 25HNA960 3/8 3/8 7/8 1 - 1/8 Crankcase ft. (7.6 m) of lineset.
PAGE 5
Install Liquid-Line Filter Drier Evacuate Indoor Refrigerant Tubing and Indoor Coil Refer to Fig. 3 and install filter drier as follows: 1. Braze 5-in. (127 ram) liquid tube to the indoor coil. 2. Wrap filter drier with damp cloth. 3. Braze filter drier to above 5-in. (127 ram) liquid arrow must point towards indoor coil. 4. Connect and braze liquid refrigerant tube. Flow tube to the filter drier. []NIT DAMAGE Failure damage HAZARD to follow this caution or improper operation.
PAGE 6
NOTE:Install branch circuit disconnect ofadequate sizeperNEC tohandle unitstarting current. Locate disconnect withinsightfrom andreadily accessible fromunit,perSection 440-14 ofNEC. Install Route Make Airflow Airflow Setup Ground Remove access from disconnect control box. and Power Wires panel to gain access to unit wiring. through power wiring hole provided Extend wires and into unit Accessories Refer to accessories coil the individual when installing.
PAGE 7
Start-Up System Functions and Sequence of Operation The outdoor unit control system has following is an overview of the two-stage Cooling and Heating []NIT OPERATION AND SAFETY HAZARD The 25HNA6 Failure to follow this caution may result in minor injury, equipment damage or improper operation. Observe personal system with refrigerant. 2. Do not operate unit in a vacuum 3. Do not disable low pressure 4. Dome temperatures or at negative functions.
PAGE 8
One Minute Stage Change Time Delay on 25HNA6 Models When compressor changes there is a l-minute time outdoor fan motor remains Compressor on 25HNA6 compressor operates in motor rotates clockwise. pistons are eccentric compress refrigerant. When the with compressor compressor The lower refrigerant. The unit time delays stages from high to low or low to high, delay before compressor restarts. The running.
PAGE 9
O _[_0 •slq]l] 0 0 0 0 _l_Z1 0 _R[_ 0 o O0 % 0 0 ,# oo MODEL PLUG _T © 0 O ABeD MODEL PLUG _'r © * SUPPLIED BY UTILITY i iquk{ i ine S,,lenok{ PROVIDER A06525 A06526 Fig. 6 - 2-Stage GENERAL Low When this temperature, Infinity Cooling unit is operating below 55°F (12.78°C) outdoor provisions must be made for low ambient operation. Controlled This unit is capable low ambient cooling: of low ambient cooling without a kit ONLY when using Infinity control.
PAGE 10
Theoutdoor fanoutput (ODF) willremain offfor20seconds after Accessory Liquid Solenoid with Infinity Communicating termination. Thisdelay willallowtimeforthesystem tocapture Control: When using the Infinity Control, the liquid-line solenoid theheat fromtheoutdoor coilandreduce the"steam cloud"effect output is provided at the Y1 connection. Connect the solenoid as thatmayoccur ontransition fromdefrost totheheating cycle.The shown in the wiring label diagram.
PAGE 11
MAJOR COMPONENTS 2-Stage Control The HP control board controls the following • High and low stage compressor • Outdoor fan motor operation • Reversing valve operation • • • • • • • On new units, the model and serial numbers are input into the board's memory at the factory. If a model plug is lost or nfissing at initial installation, the unit will operate according to the information input at the factory and the appropriate error code will flash temporarily.
PAGE 12
andOCTfaults willnotbecleared. Thecode willcontinue to be 25HNA6 flashed. on Models The control is shipped with the brownout status is remembered until toggled down/power up sequence will not necessary defeat. to do the toggle active. The change to a new status. reset the status.
PAGE 13
THERMISTOR Thermistor CURVE Sensor Comparison The control continuously monitors and compares the outdoor air temperature sensor and outdoor coil temperature sensor to ensure proper operating conditions. The comparison is: 90 80 • In cooling if the outdoor air sensor indicates -> 10°F (->5.6 ° C) warmer than the coil sensor (or) the outdoor air sensor indicates -> 20°F (-> 11°C) cooler than the coil sensor, the sensors are out of range. • In heating if the outdoor air sensor indicates -> 35°F (-> 19.
PAGE 14
Status Table Most Codes 6 shows system as flashed The status code, error codes the status problems by the amber are flashed light. The followed code.
PAGE 15
FAN 2 STAGE COIL THERMtDISTAT HEAT PUMP Variable Speed Furnace Thermidistat 2-Stage Heat Pump I...... RVS/Heat Stage 2 RVS .... Heat Stage 1 Compressor Low Compressor High Hot Heating 24VAC Hot Cooling Dry Contact 24VAC HEAT r--" I -J "_ , 2 MODEsDEHUMIDIFY ©.. Stage 1 Heat/Cool Stage 2 _F'Y'_"_ - 24VAC Hot 24VAC Hot Cooling Heating Dry Contact 1 Dry Contact 2 Common Humidify _ \ Humidifier Solenoid Outdoor Remote -] I Air Room Sensor I--6-#qI--_TL -7
PAGE 16
FINALCHECKS IMPORTANT: Before leaving job,besure todothefollowing: 1.Ensure thatallwiringisrouted away fromtubing andsheet metal edges toprevent rub-through orwirepinching. 2.Ensure thatallwiringandtubingissecure in unitbefore adding panels andcovers. Securely fasten allpanels and covers. 3.Tighten service valvestemcapsto1/12-turn pastfinger tight. 4.Leave Users Manual withowner. Explain system operation andperiodic maintenance requirements outlined inmanual. 5.