Specifications

ManualsBrandsBryant ManualsHeat Pump551B

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE

UNIT MUST BE INSTALLED IN ACCORDANCE

WITH INSTALLATION INSTRUCTIONS

GUIDE SPECIFICATIONS (cont)

11. Thermostat and Subbase:

Provides staged cooling and heating automatic (or

manual) changeover, fan control, and indicator light.

12. Thru-The-Bottom Service Connectors:

Kit shall provide connectors to permit electrical con-

nections to be brought to the unit through the

basepan.

* 13. Electronic Programmable Thermostat:

Capable of using deluxe full-featured electronic ther-

mostat. Shall use built-in compressor cycle delay

control for both heating and cooling duty.

14. Condenser Coil Hail Guard Assembly:

Hail guard shall protect against damage from hail

and flying debris.

* 15. High-Static Motor and Drive (036-120 only):

High static motor and drive shall be factory-installed

to provide additional performance range.

16. Condenser Coil Grille:

The grille protects the condenser coil from damage

by large objects without increasing unit clearances.

* 17. Compressor Cycle Delay:

Unit shall be prevented from restarting for a mini-

mum of 5 minutes after shutdown.

18. Fan/Filter Status Switch:

Provides status of evaporator fan (ON/OFF) or

indoor-air filter (CLEAN/DIRTY). Status shall be dis-

played with an indicator light at the thermostat.

* 19. Unit-Mounted, Non-Fused Disconnect Switch:

Shall be factory-installed, internally mounted, NEC

and UL approved non-fused switch shall provide unit

power shutoff. Shall be accessible from outside the

unit and shall provide power off lockout capability.

(Cannot be used with units rated over 80 amps.)

* 20. Convenience Outlet:

Shall be factory-installed and internally mounted with

easily accessible 115-v female receptacle. Shall

include 15 amp GFI receptacle with independent

fuse protection. Voltage required to operate conve-

nience outlet shall be provided by a factory-installed

step-down transformer. Shall be accessible from out-

side the unit.

21. EconoMi$er and Power Exhaust:

EconoMi$er shall utilize a micro-processor based

control and a gear driven damper system.

EconoMi$er shall provide controls and spring return

on power loss. The system shall exhaust up to 100%

of the return air (vertical applications only).

22. Power Exhaust for Accessory EconoMi$er:

Two two-stage power exhaust shall be used in con-

junction with EconoMi$er to provide the system with

the capability to exhaust up to 100% of return air.

The power exhaust is a field-installed accessory for

vertical and horizontal applications.

* 23. Dehumidification Package:

The dehumidification package is a factory-installed

option that provides increased dehumidification by

further subcooling the hot liquid refrigerant leaving

the condenser coil. The package consists of a

subcooling coil located on the leaving-air side of the

evaporator coil. The location of this coil in the indoor

airsteam greatly enhances the latent capacity of the

551B units.

The package shall be equipped with crankcase

heater(s), low pressure switch(es), and TXV(s). Low

pressure switch(es) prevents evaporator coil freeze

up and TXV(s) assure a positive superheat condi-

tion. If the operation of the subcooling coil is con-

trolled by a field-installed, wall-mounted humidistat,

the dehumidification circuit will then operate only

when needed. Optional field connections for the

humidistat are made in the low voltage compartment

of the unit control box.

24. Humidistat:

Field-installed, wall-mounted humidistat is used to

control activation of the dehumidification package.

The humidistat can be set for humidity levels

between 20% and 80% relative humidity.

25. Light-Commercial Thermidistat:

Field-installed, wall mounted thermidistat is used to

control temperature and activation of Perfect Humid-

ity™ package. The thermidistat can be set for humid-

ity settings from 50% to 90% relative humidity.

* 26. Hinged Panel Option:

Shall be equipped with hinged access panels for the

filter, compressor, evaporator fan, and control box

areas. Filter hinged access panels permit tool-less

entry for changing filters. Each hinged access panel

is permanently attached to the rooftop unit.

27. Outdoor-Air Enthalpy Sensor:

The outdoor air enthalpy sensor shall be used with

the EconoMi$er device to provide single enthalpy

control. When used in conjunction with a return air

enthalpy sensor, the EconoMi$er device will provide

differential enthalpy control. the sensor allows the

EconoMi$er controller to determine if outside air is

suitable for free cooling.

28. Return-Air Enthalpy Sensor:

The return air enthalpy sensor shall be used with the

EconoMi$er device. When used in conjunction with

an outdoor air enthalpy sensor, the EconoMi$er

device will provide differential enthalpy control.

29. Return-Air Temperature Sensor:

The return-air temperature sensor shall be used with

the EconoMi$er device. When used in conjunction

with an outdoor-air temperature sensor, the

EconoMi$er device will provide differential tempera-

ture control.

30. Indoor-Air Quality (CO

) Sensor:

Shall have the ability to provide demand ventilation

indoor-air quality (IAQ) control through the

EconoMi$er with an IAQ sensor.

The IAQ sensor shall be available in duct mount, wall

mount and wall mount with LED display. The set

point shall have adjustment capability.