bryant 146SAN Preferred Series Air Conditioner Installation Guide

146SAN Preferred Series Air Conditioner

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Product Specifications

• Product Name: 146SAN PreferredTM Series Air Conditioner
• Refrigerant: Puron AdvanceTM (R-454B)
• Nominal Capacity: 1-1/2 to 5 Tons

Product Usage Instructions

Safety Considerations

It is crucial that only EPA qualified personnel with appropriate
certification install this appliance. Safety precautions must be
strictly followed, including wearing safety gear and using the
correct tools designed for the refrigerant being used.

General Guidelines

Before beginning the installation process, ensure to read the
entire instruction manual thoroughly. Consult local building codes
and electrical codes to adhere to safety standards.

Installation Process

1. Use only tools designed for the specific refrigerant of the
unit.

2. Prior to installation, use a refrigerant detector to check
for any leaks.

3. Avoid open flames during the installation except for brazing
operations.

4. Follow the specific instructions for brazing on refrigerant
tubes.

5. Always follow the safety guidelines and warnings provided in
the manual.

FAQ (Frequently Asked Questions)

Q: Who should install the 146SAN PreferredTM Series Air

Conditioner?

A: The appliance should only be installed by EPA qualified
personnel with appropriate certification.

Q: What refrigerant does the air conditioner use?

A: The air conditioner uses Puron AdvanceTM refrigerant
(R-454B).

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146SAN PreferredTM Series Air Conditioner with Puron AdvanceTM Refrigerant 1-1/2 to 5 Nominal Tons

Installation Instructions
NOTE: For use with R-454B indoor units only. Read the entire instruction manual before starting installation.

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Check Equipment and Job Site . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Install on a Solid, Level Mounting Pad . . . . . . . . . . . . . . . . . . . . . 2 Clearance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Operating Ambient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Make Piping Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Mandatory Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Make Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Compressor Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Install Electrical Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Check Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Final Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Repairing Refrigerant Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 CARE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
SAFETY CONSIDERATIONS
IMPORTANT: This appliance shall only be installed by EPA qualified personnel having appropriate certification. This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
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 a dry powder or CO2 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.
Proper tools should be used that are designed for the refrigerant of the unit being installed. For A2L refrigerants, non-sparking tools are required. A refrigerant detector should be used prior to and during the installation process to check for leaks. Open flames or other ignition sources should not be present except during brazing. Brazing should only take place on refrigerant tubes that are open to the atmosphere or have been properly evacuated.
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

may 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.
! 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. There may be more than 1 disconnect switch. Lock out and tag switch with a suitable warning label.
! WARNING
EXPLOSION HAZARD Failure to follow this warning could result in death, serious personal injury, and/or property damage. Never use air or any gas containing oxygen for leak testing or operating refrigerant compressors. Never allow compressor suction pressure to operate in a vacuum with service valves closed. See service manual for pump-down instructions.
GENERAL
NOTE: In some cases noise in the living area has been traced to gas pulsations from improper installation of equipment. 1. Roof mounted units exposed to winds may require wind baffles. 2. Locate unit away from windows, patios, decks, etc. where unit
operation sound may disturb customer. 3. Ensure that vapor and liquid tube diameters are appropriate for unit
capacity. 4. Run refrigerant tubes with no bends with centerline bend radius less
than 2.5 times the external pipe diameter. 5. Leave some slack between structure and unit to absorb vibration. 6. When passing refrigerant tubes through the wall, seal opening with
RTV or other pliable silicon-based caulk. (See Fig. 1.) 7. Avoid direct tubing contact with water pipes, duct work, floor
joists, wall studs, floors, and walls. 8. 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). 9. Ensure that tubing insulation is pliable and completely surrounds
vapor tube. 10. When necessary, use hanger straps which are 1 in. (25 mm) wide
and conform to shape of tubing insulation. (See Fig. 1.) 11. Isolate hanger straps from insulation by using metal sleeves bent to
conform to shape of insulation. 12. Provision shall be made for expansion and contraction of long runs
of piping.

146SAN: Installation Instructions

13. Piping and fittings shall be protected as far as possible against adverse environmental effects. For example, the accumulation of dirt and debris.

14. Piping should be installed to reduce the likelihood of hydraulic shock damaging the system.

15. Certified piping and components must be used in order to protect against corrosion.

16. Flexible pipe elements shall be protected against mechanical damage, excessive stress by torsion, or other forces. They should be checked for mechanical damage annually.

17. Piping material, routing, and installation shall include protection from physical damage in operation and service, and be in compliance with the national and local codes and standards of the installation site.

18. When setting up refrigerant piping, precautions shall be taken to avoid excessive vibration or pulsation

OUTDOOR WALL

INDOOR WALL

CAULK

LIQUID TUBE

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 local distributor for details and PE (Professional Engineer) certification, if required.

INSULATION

SUCTION TUBE

THROUGH THE WALL

HANGER STRAP (AROUND SUCTION
TUBE ONLY)

JOIST
INSULATION SUCTION TUBE

1″ (25.4 mm) MIN
SUSPENSION

LIQUID TUBE

Fig. 1 ­ Connecting Tubing Installation

A07588

INSTALLATION
IMPORTANT: Effective January 1, 2023, all split system and packaged air conditioners must be installed pursuant to applicable regional efficiency standards issued by the Department of Energy.

! 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.

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.

UNIT BASE PAN Dimension in. (mm)
23-1/2 X 23-1/2 (596.9 X 596.9)

TIEDOWN KNOCKOUT LOCATIONS in. (mm)

A

B

C

7-13/16 (198.4) 4­7/16 (112.7) 18­1/16 (458.8)

26 X 26 (660.4 X 660.4)

9­1/8 (231.8)

4­7/16 (112.7) 21­1/4 (539.8)

31­1/2 X 31­1/2 (800.1 X 800.1)

9­1/8 (231.8)

6­9/16 (166.7) 24­11/16 (627.1)

35 X 35 (889 X 889)

9­1/8 (231.8)

6­9/16 (166.7) 28­7/16 (722.3)

Fig. 2 ­ Tiedown Knockout Locations

A05177

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 may require wind baffles.. Consult the Application Guideline and Service Manual – Residential Split System Air Conditioners and Heat Pumps for wind baffle construction.

NOTE: Unit must be level to within ±2° (±3/8 in./ft.±9.5 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 mm) above unit. For proper airflow, a 6-in. (152 mm) clearance on 1 side of unit and 12-in. (305 mm) on all remaining sides must be maintained. Maintain a distance of 24 in. (610 mm) between units or 18 in. (457 mm) if no overhang within 12 ft. (3.67 m) Position so water, snow, or ice from roof or eaves cannot fall directly on unit.

NOTE: 18″ (457 mm) clearance option described above is approved for outdoor units with wire grille coil guard only. Units with louver panels require 24″ (610 mm) between units.

On rooftop applications, locate unit at least 6 in. (152 mm) above roof surface.

Operating Ambient

The minimum outdoor operating ambient in cooling mode without accessory is 55°F (13°C).

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 2

146SAN: Installation Instructions
Make Piping Connections
! WARNING
PERSONAL INJURY AND ENVIRONMENTAL 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. Federal regulations require that refrigerant is not vented into the atmosphere. Recover during system repair or final unit disposal.
! CAUTION
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 (152 mm) vertical rise at service valve. Refrigerant tubing lengths up to 36-in (914 mm) may be buried without further special consideration. Do not bury lines more than 36-in. (914 mm).
Outdoor units may be connected to indoor section using accessory tubing package or field-supplied refrigerant grade tubing of correct size and condition. Rated tubing diameters shown in Table 1 are recommended up to 80 ft. (24 m). See Product Data for acceptable alternate vapor diameters and associated capacity losses. For tubing requirements beyond 80 ft. (24 m), substantial capacity and performance losses can occur. Following the recommendations in the Residential Piping and Long Line Guideline will reduce these losses. Refer to Table 1 for field tubing diameters. Refer to the Product Data for accessory requirements. There are no buried-line applications greater than 36-in. (914 mm) allowed. If refrigerant tubes or indoor coil are exposed to atmosphere, they must be evacuated to 500 microns to eliminate contamination and moisture in the system. Refrigerant pipe should be installed with the minimum length possible and practical for the application. Piping should be protected from physical damage in operation and in service and be in compliance with national and local codes such as ASRHAE 15, ASHRAE 15.2, IAPMO. Uniform Mechanical Code, ICC International Mechanical Code, or CSA B52. When piping is installed through studs in a wall, steel plates should be used for protection with a minimum thickness of 16 gauge. All field joints shall be accessible for inspection prior to being covered or enclosed. Outdoor Unit Connected to Factory Approved R-454B Indoor Unit When outdoor unit is connected to factory­approved R-454B indoor unit, outdoor unit contains approximate system refrigerant charge for operation with AHRI rated indoor unit when connected by 15 ft. (5 m) of field­supplied or factory accessory tubing and factory supplied filter drier. For all sizes, adjust charge by adding or removing 0.6 oz/ft of 3/8 liquid line above or below 15 ft. (5 m) respectively. Connect vapor and liquid tubes to fittings on vapor and liquid service valves (see Table 1). Use refrigerant grade tubing.

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 refrigerant system work is complete or the charge will be lost. Leave the plugs in place until line set tubing is ready to be inserted. Refrigerant Tubing Connection Outdoor IMPORTANT: Maximum liquid-line size is 3/8-in. OD for all residential applications including long line. Refer to Residential Piping and Long Line Guideline for further information. IMPORTANT: Always install the factory-supplied liquid-line filter drier. If replacing the filter drier, refer to Product Replacement Parts List for appropriate part number. Obtain replacement filter driers from your distributor or branch. Brazing Connection
! CAUTION
UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation. Service valves must be wrapped in a heat-sinking material such as a wet cloth while brazing.
If using brazing connections, use a properly sized swedge tool to create a swedge (bell) on one of the two copper tubes being connected. Alternatively, a copper coupling can be used which will require two braze joints instead of one. Clean line set tube ends with emery cloth or steel brush. Remove any grit or debris. Connect vapor tube to fitting on outdoor unit vapor service valves (see Table 1). Connect liquid tubing to adapter tube on liquid service valve. Use refrigerant grade tubing. 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. After wrapping service valve with a wet cloth, tubing set can be brazed to service valve using either silver bearing or non­silver bearing brazing material. Do not use soft solder (materials which melt below 800°F/427°C). Braze joints using a Sil-Fos or Phos-copper alloy. Consult local code requirements. Some outdoor units contain a mechanical fitting at the liquid distributor. This connection is not field serviceable and should not be disturbed. For Vapor Service Valve, remove valve core from schrader port on Service Valve BEFORE brazing. This helps prevent overheating and damage to valve seals (refer to Fig. 3). Replace valve core when brazing is completed.

Fig. 3 ­ Vapor Service Valve

A14236

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 3

146SAN: Installation Instructions

! WARNING
FIRE HAZARD Failure to following this warning could result in personal 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 before brazing any component or lines.

! CAUTION
BURN HAZARD Failure to follow this caution may result in personal injury Components will be HOT after brazing. Wear appropriate personal protective equipment and allow to cool before handling parts and equipment.

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

UNIT SIZE
18 24, 30 36, 42, 48
60

LIQUID*
Tube Diameter
3/8 3/8 3/8 3/8

RATED VAPOR*

Connection Diameter

Tube Diameter

3/4

5/8

3/4

3/4

7/8

7/8

7/8

1-1/8

*.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 indoor coils to these units. 2.For Tubing Set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 35 ft.(11 m) vertical differential 250 ft. (76.2 m) Total Equivalent Length, refer to the Residential Piping and Long Line Guideline ­ Air Conditioners and Heat Pumps using Puron AdvanceTM refrigerant.
3.For alternate liquid line options, see Product Data or Residential Piping and Long Line Application Guideline
Mechanical Line Set Connections
If using mechanical or crimp-type line set connections, follow crimp tool
manufacturer’s instructions. Mechanical fittings are only permitted if approved for field installation by the supplier.
NOTE: Failure of the fittings or failure of the equipment due to use of mechanical fittings would not be covered under the equipment limited warranty. Install Liquid-Line Filter Drier Indoor
Refer to Fig. 4 and install filter drier as follows:

! CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or improper operation. 1. Installation of filter drier in liquid line is required. 2. Filter drier must be wrapped in a heat-sinking material such as a wet
cloth while brazing.

1. Braze 5-in. 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.

Fig. 4 ­ Liquid Line Filter Drier Evacuate Refrigerant Tubing and Indoor Coil

A05178

! 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 triple evacuation procedure in service manual). Always break a vacuum with dry nitrogen.
Leak Check
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. A tight dry system will hold a vacuum of 1000 microns after approximately 7 minutes. See Fig. 5

Fig. 5 ­ Deep Vacuum Graph

A95424

Mandatory Requirements

Pressure Proof Check

Refrigerant tubes and indoor coil should be pressure tested with an inert

gas such as nitrogen. Pressurize the system with the inert gas to the Low Side Test Pressure listed on the outdoor unit rating plate.

1. Pform a pressure check of the unit with a nitrogen charge of about 200psi.

2. The Nitrogen holding charge must NOT decrease in pressure for 1 hour, as indicated by the test gauge. The measuring test gauge resolution not exceeding 5% of the holding charge.

! WARNING

EXPLOSION HAZARD
Failure to follow this warning could result in death, serious personal injury and/or property damage. Never exceed the test pressures listed on the rating plate when pressure testing an outdoor unit.

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 4

146SAN: Installation Instructions

! WARNING
FIRE HAZARD Failure to following this warning could result in personal injury, death and/or property damage. DO NOT USE FLAMES OR IGNITION SOURCES TO LEAK CHECK.
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 or wires. Pay close attention to feeder tubes, making sure wire ties on feeder tubes are secure and tight. Make Electrical Connections
! WARNING
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.
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. NOTE: Install branch circuit disconnect of adequate size per NEC to handle unit starting current. Locate disconnect within sight and readily accessible from unit, per Section 440-14 of NEC. Refer to Product Data for breaker sizing. Route Ground and Power Wires Remove access panel to gain access to unit wiring. Extend wires from disconnect through power wiring hole provided and into unit control box.
! WARNING
ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. The unit cabinet must have an uninterrupted or unbroken ground to minimize personal injury if an electrical fault should occur. The ground may consist of electrical wire or metal conduit when installed in accordance with existing electrical codes.
Connect Ground and Power Wires This appliance incorporates an earth connection for safety purposes only. Connect ground wire to ground connection in control box for safety. Connect power wiring to contactor as shown in Fig. 6.

Fig. 6 ­ Line Connections

A94025

Connect Control Wiring

Route 24-v control wires through control wiring grommet and connect leads to control wiring. Refer to thermostat Installation Instructions for wiring specific unit combinations (see Fig. 7).

Use No. 18 AWG color-coded, insulated (35°C minimum) wire. If thermostat is located more than 100 ft. (30 m) from unit, as measured along the control voltage wires, use No. 16 AWG color-coded wire to avoid excessive voltage drop.

All wiring must be NEC Class 2 and must be separated from incoming power leads.

Use furnace transformer, fan coil transformer, or accessory transformer for control power, 24v/40va minimum.

NOTE: Use of available 24v accessories may exceed the minimum 40va power requirement. Determine total transformer loading and increase the transformer capacity or split the load with an accessory transformer as required.

NOTE: Factory Authorized Dissipation System must be installed with the indoor unit.

Fig. 7 ­ Generic Wiring Diagrams (See Thermostat InAs0t2a4l0l2a8t4i/Ao9n7368 Instruction for specific unit combinations)
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 5

146SAN: Installation Instructions
InteliSenseTM Technology
This unit is InteliSenseTM capable when used with an Ecobee for Bryant smart thermostat with InteliSenseTM technology.
InteliSenseTM technology allows for the collection of performance data to be sent to the cloud. Utilizing Bryant’s digital tools, dealers can gather system settings and equipment data, with homeowner opt-in, to provide quicker and more efficient service. The unit comes with the following sensors installed on the control board (see Fig. 8): · Liquid Service Valve Pressure (LSVP) · Liquid Service Valve Temperature (LSVT) · Outside Air Temperature (OAT) · Vapor Service Valve Pressure (VSVP) · Vapor Service Valve Temperature (VSVT)
The amber LED is illuminated solid when there is power to the product. The green LED is illuminated solid when there is communication between the control board and the InteliSenseTM-enabled thermostat.

Final Wiring Check
IMPORTANT: Check factory wiring and field wire connections to ensure terminations are secured properly. Check wire routing to ensure wires are not in contact with tubing, sheet metal, etc.
Compressor Crankcase Heater
When equipped with a crankcase heater, furnish power to heater a minimum of 24 hr before starting unit. To furnish power to heater only, set thermostat to OFF and close electrical disconnect to outdoor unit.
A crankcase heater is required if refrigerant tubing is longer than 80 ft. (24 m) or when outdoor unit is 35 ft. (11 m) below indoor unit. Refer to the Residential Piping and Long Line Guideline and Service Manual.
Install Electrical Accessories
Refer to the individual instructions packaged with kits or accessories when installing.
! WARNING
PERSONAL INJURY AND/OR PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in personal injury and/or property damage. For continued performance, reliability, and safety, the only approved accessories and replacement parts are those specified by the equipment manufacturer. The use of non-manufacturer approved parts and accessories could invalidate the equipment limited warranty and result in fire risk, equipment malfunction, and failure. Please review manufacturer’s instructions and replacement part catalogs available from your equipment supplier.

Start-Up
! CAUTION
ENVIRONMENTAL HAZARD Failure to follow this caution may result in environmental damage. Federal regulations require that you do not vent refrigerant to the atmosphere. Recover during system repair or final unit disposal.

Fig. 8 ­ InteliSenseTM Control Board

HK32EA013

For more information, refer to the thermostat advanced installation and configuration instructions found at: Bryant.HVACPartners.com/InteliSense

r, by scanning this QR Code:

! CAUTION
UNIT OPERATION AND SAFETY HAZARD Failure to follow this caution may result in personal injury, equipment damage or improper operation. · Do not overcharge system with refrigerant. · Do not operate unit in a vacuum or at negative pressure. · Compressor dome temperatures may be hot.

NOTE: A new thermostat will show up in connected portal 24 hours after field installation so field gauges are needed for install.
NOTE: The outdoor temperature sensor does not show up on this new thermostat display so it should not be used for troubleshooting or charging.

! CAUTION
PERSONAL INJURY HAZARD Failure to follow this caution may result in personal injury. Wear safety glasses, protective clothing, and gloves when handling refrigerant and observe the following: · Front seating service valves are equipped with Schrader valves.

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 6

146SAN: Installation Instructions
Follow these steps to properly start up system:
! WARNING
PERSONAL INJURY HAZARD Failure to follow this warning could result in personal injury or death. Do not use power tools to open and close service valves. Power tools can cause valve stem to suddenly be ejected from the valve body followed by a high pressure refrigerant leak.
1. After system is evacuated, fully open liquid and vapor service valves.
2. Unit is shipped with valve stem(s) front seated (closed) and caps installed. Replace stem caps after system is opened to refrigerant flow. Replace caps finger-tight and tighten with wrench an additional 1/12 turn.
3. Close electrical disconnects to energize system.
4. Set room thermostat at desired temperature. Be sure set point is below indoor ambient temperature.
5. Set room thermostat to COOL and fan control to ON or AUTO mode, as desired. Operate unit for 15 minutes. Check system refrigerant charge.
Sequence of Operation
Turn on power to indoor and outdoor units. Transformer is energized.
On a call for cooling, thermostat makes circuits R-Y and R-G. Circuit R-Y energizes contactor, starting outdoor fan motor and compressor circuit. R-G energizes indoor unit blower relay, starting indoor blower motor on high speed.
When thermostat is satisfied, its contacts open, de-energizing contactor and blower relay. Compressor and motors should stop.
If indoor unit is equipped with a time-delay relay circuit, the indoor blower will run up to 30 or 90 seconds to increase system efficiency.
Check Charge
Factory charge amount and desired subcooling are shown on unit rating plate. Charging method is shown on information plate inside unit. Care should be taken to ensure proper refrigerant is used for charging. Refer to outdoor unit rating plate to determine proper refrigerant. Refrigerant cylinders used for charging should be kept in an appropriate position and grounded to earth before charging. Hose length should be kept to a minimum. Care should be taken to not overcharge the system. For TXV, use subcooling method. To properly check or adjust charge, conditions must be favorable for subcooling charging. Favorable conditions exist when the outdoor temperature is between 70°F and 100°F (21°C and 38°C), and the indoor temperature is between 70°F and 80°F (21°C and 27°C). Follow the procedure below: Unit is factory charged for 15ft (4.6 m) of lineset. Adjust charge by adding or removing 0.6 oz/ft of 3/8 liquid line above or below 15 ft. (4.6 m) respectively. Allow system to operate at least 15 minutes. If conditions are favorable, check system charge by subcooling method for TXV. If any adjustment is necessary, adjust charge slowly and allow system to operate for 15 minutes to stabilize before declaring a properly charged system. If the indoor temperature is above 80°F (27°C), and the outdoor temperature is in the favorable range, adjust system charge by weight based on line length and allow the indoor temperature to drop to 80°F (27°C) before attempting to check system charge by subcooling method as described above. If the indoor temperature is below 70°F (21°C), or the outdoor temperature is not in the favorable range, adjust charge for line set length above or below 15 ft. (4.6 m) only. Charge level should then be appropriate for the system to achieve rated capacity. The charge level could then be checked at another time when the both indoor and outdoor temperatures are in a more favorable range.

Units with TXV
Units installed with TXV require charging by the subcooling method. 1. Operate unit a minimum of 15 minutes before checking charge.
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 or electronic thermometer to liquid line near outdoor coil.
4. Refer to unit rating plate for required subcooling temperature.
5. Refer to Table 3. Find the point where required subcooling temperature intersects measured liquid service valve pressure.
6. To obtain required subcooling temperature at a specific liquid line pressure, add refrigerant if liquid line temperature is higher than indicated or reclaim refrigerant if temperature is lower. Allow a tolerance of ±3°F (±1.7°C).
NOTE: If line length is beyond 80 ft (24 m) or greater than 35 ft (11 m) vertical separation, See Residential Piping and Long Line Guideline for special charging requirements. Final charge should be recorded on the outdoor unit charging label with permanent and legible writing. Total refrigerant charge is factory charge plus any added charge. Verify that the indoor space served by the indoor unit, including spaces connected by ductwork, exceed the minimum room size as listed on the outdoor unit charging label. Refer to Table 2.

Table 2 ­ Minimum Room Area Charging Table

Total System Charge (lbs.) 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Minimum Floor Area (sq. ft.) 61 76 91 106 122 137 152 167 182 196 213 226 243 256 274 289 304 319 335 350 365 380

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 7

146SAN: Installation Instructions

Table 3 ­ Required Liquid Line Temperature

Liquid (PSIG)

Pressure at Service Valve

6

R-454B Required Subcooling Temperature (°F)

8

10

12

14

16

238

78

76

74

72

70

68

245

80

78

76

74

72

70

252

82

80

78

76

74

72

260

84

82

80

78

76

74

268

86

84

82

80

78

76

276

88

86

84

82

80

78

284

90

88

86

84

82

80

292

92

90

88

86

84

82

301

94

92

90

88

86

84

309

96

94

92

90

88

86

318

98

96

94

92

90

88

327

100

98

96

94

92

90

336

102

100

98

96

94

92

346

104

102

100

98

96

94

355

106

104

102

100

98

96

365

108

106

104

102

100

98

375

110

108

106

104

102

100

385

112

110

108

106

104

102

396

114

112

110

108

106

104

406

116

114

112

110

108

106

417

118

116

114

112

110

108

428

120

118

116

114

112

110

439

122

120

118

116

114

112

450

124

122

120

118

116

114

Final Checks
IMPORTANT: Before leaving job, be sure to do the following:
1. Ensure that all wiring is routed away from tubing and sheet metal edges to prevent rub-through or wire pinching.
2. Ensure that all wiring and tubing is secure in unit before adding panels and covers. Securely fasten all panels and covers.
3. Tighten service valve stem caps to 1/12-turn past finger tight.
4. Leave Owner’s Manual with owner. Explain system operation and periodic maintenance requirements outlined in manual.
5. Fill out Dealer Installation Checklist and place in customer file.
Repairing Refrigerant Circuit
When breaking into the refrigerant circuit to make repairs, or for any other purpose, the following procedures shall be used.
1. Safely remove the refrigerant using a recovery pump certified for flammable refrigerants.
2. Purge the refrigerant circuit with nitrogen gas.
3. Evacuate the refrigerant circuit to 1500 microns.
4. Break vacuum with a nitrogen purge of the refrigerant circuit ensuring that the outlet of the vacuum pump is not near a potential ignition source.
5. Open the circuit by cutting or brazing.

CARE AND MAINTENANCE
For continuing high performance and to minimize possible equipment failure, periodic maintenance must be performed on this equipment.
Frequency of maintenance may vary depending upon geographic areas, such as coastal applications. See Owner’s Manual for information.

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© 2024 Carrier. All rights reserved. A Proud Member of the Carrier Family

Edition Date: 06/24

Catalog No: II146SAN-01 Replaces:New

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

8

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