Bryant 650A warranty Compressor Start Assist-Capacitor and Relay, Compressor Start Assist-PTC Type

ACCESSORY DESCRIPTION AND USAGE (Listed Alphabetically)

1.Compressor Start Assist—Capacitor and Relay

Start capacitor and start relay which gives a “hard” boost to compressor motor at each start-up. SUGGESTED USE: Installations where interconnecting tube length exceeds 50 ft.

Installations where outdoor design temperature exceeds 105°F (40.6°C).

Units installed with Low Ambient Pressure Switch. Units installed with Liquid-Line Solenoid Valve.

2.Compressor Start Assist—PTC Type

Solid-state electrical device which gives a “soft” boost to the compressor at each start-up.

SUGGESTED USE: Installations with marginal power supply.

3.Crankcase Heater

An electric resistance heater which mounts to the base of the compressor to keep the lubricant warm during off cycles. Improves compressor lubrication

on restart and minimizes chance of refrigerant slugging. May or may not include a thermostat control. SUGGESTED USE: When interconnecting tube length exceeds 50 ft.

When unit will be operated below 55°F (12.8°C) outdoor air temperature. (Use with Low-Ambient Pressure Switch.) All commercial installations.

4.Evaporator Freeze Thermostat

An SPST temperature actuated switch which stops unit operation when evaporator reaches freeze-up conditions.

SUGGESTED USE: All units to which Low-Ambient Pressure Switch has been added.

5.Filter Drier—Suction Line

A device for removing contaminants from refrigerant circulating in a heat pump system; 2-direction flow for heat pumps. SUGGESTED USE: Split-system heat pumps.

6.Interface Control (Energy Minder)

An electric control for controlling a heat pump and gas or oil furnace system for maximum energy savings. It allows heat pump to operate down to a predetermined economic balance point temperature, then switches to allow furnace operation only below that temperature. Requires outdoor thermostat (Item 11) to be adjusted for economic balance point temperature.

SUGGESTED USE: For heat pump and gas- or oil-fired furnace combination systems unless Duel Fuel Thermostat or Thermidistat™ Control is used.

7.Isolation Relay

An SPDT relay which switches the Low-Ambient Controller out of the outdoor fan motor circuit when the heat pump switches to heating mode. SUGGESTED USE: All heat pumps where Low-Ambient Pressure Switch has been added.

8.Liquid-Line Solenoid Valve (LSV)

An electrically operated shutoff valve to be installed at the outdoor unit which stops and starts refrigerant liquid flow in response to compressor operation. Maintains a column of refrigerant liquid ready for action at next compressor operation cycle.

SUGGESTED USE: In long-line applications. (Refer to the Residential Split-System Long-Line Application Guideline and Service Manual.)

9.Low-Ambient Pressure Switch

A long life pressure switch which is mounted to outdoor unit service valve. It is designed to cycle the outdoor fan motor in order to maintain head pressure within normal operating limits (approximately 200 psig to 365 psig). The control will maintain working head pressure at low-ambient temperatures down to

0°F (–17.8°C) when properly installed.

SUGGESTED USE: Cooling operation at outdoor temperatures below 55°F (12.8°C).

10.Outdoor Air Temperature Sensor

A device that allows the temperature at a remote location (outdoors) to be displayed at the thermostat.

SUGGESTED USE: All Bryant programmable thermostats.

11.Outdoor Thermostat

An SPDT temperature actuated switch which turns on supplemental electric heaters when outdoor air temperature drops below set point. SUGGESTED USE: Heat pump installations with multiple-stage supplemental heaters.

12.Secondary Outdoor Thermostat

An SPDT temperature actuated switch which turns on a third stage of supplemental electric heaters when outdoor air temperature drops below the second-stage set point.

SUGGESTED USE: Heat pump installations where 3-stage operation of supplemental heaters is desired.

13.Service Alarm

A current-sensing lockout relay which provides immediate notification that compressor is not operating during a call for heating or cooling. Used with proper room thermostat, a thermostat signal is turned on signifying service is required. This can minimize electrical cost increase due to operation of supplemental heaters only.

SUGGESTED USE: As a feature to notify owner immediately when the system is not operating most efficiently.

14.Snow Stand

Coated wire rack which supports unit 18 in. above mounting pad to allow for drainage from unit base.

SUGGESTED USE: Heat pump installations in heavy snowfall areas.

Heat pump installations in snowdrift locations.

Heat pump installations in areas of prolonged subfreezing temperatures.

All commercial installations.

15.Support Feet

Four stick-on plastic feet which raise the unit 4 in. above the mounting pad. This allows sand, dirt, and other debris to be flushed from the unit base;

minimizes corrosion.

SUGGESTED USE: Coastal installations.

Windy areas or where debris is normally circulating. Rooftop installations.

16.Thermostatic Expansion Valve (TXV)—Bi-Flow

A modulating flow-control valve which meters refrigerant liquid flow rate into the evaporator in response to the superheat of the refrigerant gas leaving the evaporator. Kit includes valve, adapter tubes, and external equalizer tube.

SUGGESTED USE: Required for all installations.

17.Time-Delay Relay

An SPST delay relay which briefly continues operation of the indoor blower motor to provide additional cooling after the compressor cycles off. SUGGESTED USE: For improved efficiency ratings for certain combinations of indoor and outdoor units. (Refer to ARI Unitary Directory.)

Required for use on all zoning systems.

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