Bryant 551J installation instructions Typical Component Location

Page 16

DISCONNECT

EMT OR RIGID CONDUIT

SINGLE

CENTER

MANUAL RESET

MOUNTING

(FIELD-SUPPLIED)

POINT BOX

POST

LIMIT SWITCH

LOCATION

 

 

 

HEATER

 

 

 

 

 

 

 

 

COVERS

 

 

SINGLE POINT

 

 

 

MAIN

BRACKET AND

BOX

HEATER

HEATER

HEATER

CONTROL CONDUIT

MOUNTING

MODULE

MODULE

MOUNTING

BOX

DRIP BOOT

SCREW

(LOCATION 1) (LOCATION 2) BRACKET

CONTROL WIRE TERMINAL BLOCK

C08134

Fig. 25 - Typical Component Location

551J

j

 

TRACK

FLANGE

C08135

Fig. 26 - Typical Module Installation

Single Point Boxes and Supplementary Fuses — When the unit MOCP device value exceeds 60-A,unit-mounted supplementary fuses are required for each heater circuit. These fuses are included in accessory Single Point Boxes, with power distribution and fuse blocks. The single point box will be installed directly under the unit control box, just to the left of the partition separating the indoor section (with electric heaters) from the outdoor section. The Single Point Box has a hinged access cover. See Fig. 27. The Single Point Box also includes a set of power taps and pigtails to complete the wiring between the Single Point Box and the unit’s main control box terminals. Refer to the accessory heater and Single Point Box installation instructions for details on tap connections.

All fuses on 551J units are 60-A. (Note that all heaters are qualified for use with a 60-A fuse, regardless of actual heater ampacity, so only 60-A fuses are necessary.)

Single Point Boxes without Fuses — Unit heater applications not requiring supplemental fuses require a special Single Point Box without any fuses. The accessory Single Point Boxes contain a set of power taps and pigtails to complete the wiring between the Single Point Box and the unit’s main control box terminals. Refer to accessory heater and Single Point Box installation instructions for details on tap connections.

CONTROL

BOX

BUSHING

 

SINGLE

 

POINT BOX

 

MOUNTING

 

SCREWS

 

DRIP BOOT

 

BRACKET

 

MOUNTING

 

SCREWS

 

POWER

 

WIRES

 

FOAM

 

BUSHING

 

 

22.2

23

1

3

HEATER

RELAYS

HEATER

MOUNTING

SCREWS

C08136

Fig. 27 - Typical Single Point Installation

Low-Voltage Control Connections — Pull the low-voltage control leads from the heater module(s) - VIO and BRN (two of each if two modules are installed; identify for Module #1) - to the 4-pole terminal board TB4 located on the heater bulkhead to the left of Heater #1. Connect the VIO lead from Heater #1 to terminal TB4-1. For 2 stage heating, connect the VIO lead from Heater #2 to terminal TB4-2. For 1 stage heating with 2 heater modules connect the VIO lead from both Heater #1 and #2 to terminal TB4-1. Connect both BRN leads to terminal TB4-3. See Fig. 28.

CTB

CONTL

BOARD

2VIO

3ORN

12 BRN

 

ORN

VIO

BRN

TB4

1

2

3

 

VIO

VIO

BRN BRN

Field

Connections

Elec Htr

VIO HR2 BRN

VIO HR1

BRN

HR1: On Heater 1 in Position #1

HR2: On Heater 2 in Position #2 (if installed)

C08331

Fig. 28 - Accessory Electric Heater Control

Connections

16

Image 16
Contents Installation Instructions 551J Unit Dimensional Drawing C10058 Plan for Sequence of Unit Installation Curb-mounted installationOperating Weights Plan for Unit LocationInspect unit Provide Unit SupportRoof Curb Details Field Fabricate Ductwork Rig and Place UnitInstall Outside Air Hood Convert to Horizontal and Connect Ductwork when requiredPositioning on Curb Indoor Coil Access Panel Relocation Field Power Supply Install External Condensate Trap and LineMake Electrical Connections All units Convenience OutletsConvenience Outlet Location Installing Weatherproof Cover Field Control Wiring Factory-Option Thru-Base ConnectionsUnits without Thru-Base Connections ThermostatElectric Heaters Heat Anticipator SettingsHeater Model Number Typical Component Location Controller SystemSmoke Detectors Smoke Detector Locations Typical Supply Air Smoke Detector Sensor LocationCompleting Installation of Return Air Smoke Sensor Return Air Detector Shipping PositionRTU-MP control system RTU-MP Multi-Protocol Control BoardRTU-MP System Control Wiring Diagram RTU-MP Controller Inputs and Outputs Type of I/O Connection PIN Name Numbers InputsSpace Temperature SPT Sensors 55 Space Temperature Sensor WiringRTU-MP T-56 Sensor Connections SEN Connecting Discrete Inputs Power Exhaust outputCommunication Wiring Protocols General Filter StatusLocal Access RTU-MP Troubleshooting Communication LEDsLEDs LEDs on the RTU-MP show the status of certain functionsUnit Wire/Fuse or Hacr Breaker Sizing Data FLA LRAPwrd C.O 27.8 132 42.0 47/47 Adjust Factory-Installed Options EconoMi$er IV Occupancy SwitchInstall Accessories Pre-Start and Start-Up