Bryant Legacy 114S - User Manual

Installation Instructions
NOTE: Read the entire instruction manual before starting the installation.
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 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.
GENERAL
NOTE: In some cases noise in the living area has been traced to gas
pulsations from improper installation of equipment.
1. This unit is intended to be installed in a location that is 10,000 feet
(3000 meters) above sea level or lower.
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.
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 be 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
114S, 115S
Legacy™ Line Air Conditioner
with Puron® Refrigerant
1.5 to 5 Nominal Tons
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
personal injury or death.
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.

Summary

Safety Warnings and Precautions

Electrical Shock Hazard

Warning about disconnecting power before servicing to prevent electrical shock.

Explosion Hazard

Warning against using oxygen for testing or operating compressors in vacuum.

General Installation Guidelines

Unit Location and Noise Abatement

Locate unit away from occupied areas to avoid noise disturbance.

Refrigerant Tubing Installation

Guidelines for tubing diameter, bends, slack, contact, insulation, and hangers.

Piping Protection and Expansion

Protect piping from environmental effects, ensure expansion provisions, and prevent damage.

Installation Procedures

Cut Hazard and Protective Gear

Caution to wear protective gear due to sharp sheet metal edges.

Unit Mounting and Leveling

Install unit on a solid, level pad, ensuring proper tie-downs and leveling.

Clearance Requirements

Maintain adequate clearances around the unit for airflow, service, and protection.

Piping Connections and Safety

Connect refrigerant piping, observing safety warnings for personal injury and environment.

Refrigerant Piping and Connections

Tubing Damage and Evacuation

Caution on buried tubing and system evacuation to 500 microns.

Outdoor Tubing and Filter Drier Installation

Install liquid-line filter drier and connect refrigerant tubing to service valves.

Sweat Connection Safety

Warnings and precautions for brazing refrigerant lines, including fire and burn hazards.

Indoor Components and Evacuation

Indoor Liquid-Line Filter Drier Installation

Required installation of the indoor liquid-line filter drier with precautions.

System Evacuation and Leak Check

Deep vacuum method for evacuation and fire hazard during leak checks.

Indoor Piston Installation

Procedures for checking and installing the indoor piston for piston systems.

Refrigerant Charging Methods

TXV Subcooling Charging Method

Procedure for charging units with a Thermal Expansion Valve (TXV) using subcooling.

Piston Superheat Charging Method

Procedure for charging units with indoor pistons using superheat.

Electrical Connections

Power and Ground Wiring

Connect power wiring to the contactor and ground wire for safety.

Control Wiring

Route and connect 24-v control wires, ensuring proper gauge and separation.

Pre-Operation and Start-Up

Final Wiring and Crankcase Heater Checks

Ensure wiring is secure and check crankcase heater requirements.

Start-Up Safety Hazards

Warnings for unit operation, personal injury during refrigerant handling, and compressor rotation.

System Start-Up Procedure

Steps to properly start up the system after installation.

System Charging and Accessories

Refrigerant Charge Check

Procedures for checking system charge using subcooling or superheat methods.

Accessory and Replacement Part Warning

Warning to use only approved accessories and parts for safety and warranty.

Final Steps and Maintenance

Final Installation Checks

Final checks of wiring, tubing, and securing covers before leaving.

Refrigerant Circuit Repair Procedures

Steps for safely repairing the refrigerant circuit, including evacuation.

Care and Maintenance Overview

Importance of periodic maintenance for performance and preventing failure.

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

This document provides installation instructions for the Bryant Legacy™ Line Air Conditioner with Puron® Refrigerant, covering 1.5 to 5 nominal tons. It emphasizes safety considerations, general installation guidelines, piping connections, charging procedures, electrical connections, and start-up steps.

Function Description

The Bryant Legacy Line Air Conditioner is designed to provide cooling for residential and light commercial applications. It operates as part of a split system, working in conjunction with an indoor coil and fan unit to circulate refrigerant, absorb heat from the indoor air, and release it outdoors. The unit utilizes Puron® refrigerant, an environmentally friendly alternative. The system is designed for efficient operation and includes features to ensure reliable performance. Proper installation is crucial for achieving the rated capacity and efficiency, as well as for ensuring the longevity of the equipment. The unit's operation involves a refrigeration cycle where refrigerant is compressed, condensed, expanded, and evaporated to transfer heat. The system can be configured with either a TXV (Thermostatic Expansion Valve) or an indoor piston for refrigerant metering, each requiring a specific charging method (subcooling for TXV, superheat for piston).

Usage Features

The air conditioner is intended for use in locations up to 10,000 feet (3000 meters) above sea level. When selecting a location, it's important to consider potential noise disturbance and ensure adequate airflow clearance around the unit. The unit should be mounted on a solid, level pad or platform, and provisions for tie-downs are included for areas requiring them, such as rooftop applications or regions prone to high winds.

Refrigerant tubing connections are critical for system performance. The manual specifies appropriate vapor and liquid tube diameters based on unit capacity and emphasizes running tubes with minimal bends to prevent flow restrictions. Proper sealing of wall penetrations and isolation of tubing from structural components are recommended to minimize vibration transmission and noise. The use of pliable and completely surrounding insulation for the vapor tube is also highlighted.

Electrical connections involve both power wiring and control wiring. The unit requires a dedicated branch circuit with an appropriately sized disconnect switch, located within sight and readily accessible. All wiring must comply with local and national electrical codes, and the unit must be properly grounded to ensure safety. Control wiring connects the outdoor unit to the indoor thermostat and fan unit, enabling coordinated operation. For 3-phase units, a built-in phase monitor ensures correct compressor rotation, which is essential for scroll compressors.

The system's charging procedure depends on the metering device used. For TXV systems, subcooling is the primary method, requiring measurement of liquid service valve pressure and liquid line temperature. For indoor piston systems, the superheat method is used, involving measurements of suction pressure, suction temperature, outdoor air dry-bulb temperature, and indoor air wet-bulb temperature. The manual provides detailed tables to guide these charging processes, ensuring optimal refrigerant levels for maximum efficiency and performance.

Maintenance Features

The manual stresses the importance of periodic maintenance to ensure continued high performance and to minimize equipment failure. While specific maintenance schedules are not detailed in this document, it refers to the Owner's Manual for comprehensive information, noting that frequency may vary based on geographic areas, such as coastal applications.

Key aspects of maintenance highlighted during installation include:

• Final Wiring Check: Ensuring all factory and field wiring connections are secure, properly routed, and free from contact with tubing or sheet metal edges to prevent rub-through or pinching.
• Service Valve Stem Caps: Tightening service valve stem caps to 1/12-turn past finger tight after system evacuation and charging.
• Filter Drier Installation: The installation of a liquid-line filter drier is mandatory and should be replaced if necessary, referring to the Product Replacement Parts List for the correct part number.
• Refrigerant Circuit Repair: When breaking into the refrigerant circuit for repairs, a specific procedure must be followed to safely remove refrigerant using a recovery pump, purge the circuit with nitrogen gas, evacuate to 1500 microns, and break the vacuum with a nitrogen purge before opening the circuit. This process is crucial for environmental protection and safety.
• Crankcase Heater: If the unit is equipped with a crankcase heater (required for longer refrigerant tubing runs or specific outdoor unit placements relative to the indoor unit), it must be energized for a minimum of 24 hours before starting the unit to prevent liquid refrigerant migration to the compressor.

The document also emphasizes the use of factory-authorized kits and accessories when modifying the product to maintain performance, reliability, and safety, as non-manufacturer approved parts could invalidate the warranty and lead to equipment malfunction or fire risk. This underscores the importance of using genuine components for any maintenance or repair activities.

Bryant Legacy 114S Specifications