Bryant 697C warranty Accessory Usage Guideline

ACCESSORY USAGE GUIDELINE

	REQUIRED FOR	REQUIRED FOR	REQUIRED FOR	REQUIRED FOR
	LOW-AMBIENT	LONG-LINE	BURIED LINE	SEA COAST
	APPLICATIONS	APPLICATIONS*	APPLICATIONS†	APPLICATIONS
ACCESSORY	(Below 55°F)	(Over 50 Ft)	(Over 3 Ft)	(Within 2 Miles)
Crankcase Heater	Yes	Yes	Yes	No
Evaporator Freeze Thermostat	Yes	No	No	No
Winter Start Control	Yes‡	No	No	No
Accumulator	No	No	Yes	No
Compressor Start Assist
Capacitor and Relay	Yes	Yes	Yes	No
Low Ambient Controller
or
MotorMaster® Control	Yes	No	No	No
Wind Baffle	See Low-Ambient	No	No	No
	Instructions
Coastal Filter	No	No	No	Yes
Support Feet	Recommended	No	No	Recommended
Liquid-Line Solenoid Valve		See
or		Long-Line
Hard Shutoff TXV	No	Application Guideline	Yes	No
Ball Bearing Fan Motor	Yes	No	No	No

*For tubing line sets between 50 and 175 ft, refer to Residential’s Split System Long-Line Application Guidelines.

†For buried line applications, refer to Residential’s Split Systems Buried Line Application Guidelines.

‡ Only when low-pressure switch is used.

ACCESSORY DESCRIPTION AND USAGE (Listed Alphabetically)

1.Ball Bearing Fan Motor

A fan motor with ball bearings which permits speed reduction while maintaining bearing lubrication.

SUGGESTED USE: Required on all units where low-ambient controller (full modulation feature) or MotorMaster® Control has been added.

2.Compressor Start Assist-Capacitor/Relay Type

Start capacitor and start relay gives “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).

Replacement installations with hard shutoff expansion valve on indoor coil. Units installed with low-ambient controller. Units installed with liquid solenoid valve.

3.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.

Replacement installations with rapid pressure balance (RPB) expansion valve on indoor coil.

4.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 controller.)

5.Evaporator Freeze Thermostat

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

SUGGESTED USE: With low-ambient controller.

6.Filter Drier—Bi-flow

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.

7.Interface Control

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 predeter- mined economic balance point temperature, then switches to allow furnace operation only below that temperature. Requires outdoor thermostat (Item 12) to be adjusted for economic balance point temperature.

SUGGESTED USE: For heat pump and gas- or oil-fired furnace combination systems.

8.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 controller has been added.

9.Liquid Solenoid Valve (LSV)

An electrically operated shutoff valve to be installed at the outdoor unit and 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 certain long-line applications. (Refer to Long-Line Application Guideline.)

10.Low-Ambient Controller

Head pressure controller is a cycle control device activated by a temperature sensor mounted on a header tube of the outdoor coil. It is designed to cycle the

outdoor fan motors in order to maintain condensing temperature within normal operating limits (approximately 130 to 110°F high, 70 to 50°F low). The control will maintain working head pressure at low-ambient temperatures down to 0°F when properly installed.

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

11.MotorMaster® Control

A fan speed control device activated by a temperature sensor. Designed to control condenser fan motor speed in response to the saturated, condensing tem-

perature during operation in cooling mode only. For outdoor temperatures down to –20°F, it maintains condensing temperature at 100°F ± 10°F. SUGGESTED USE: Cooling operation at outdoor temperatures below 55°F.

All commercial installations.

12.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.

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