Bryant Preferred Series Installation Instructions Manual
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Bryant Preferred Series Installation Instructions Manual

Bryant Preferred Series Installation Instructions Manual

Single package rooftop cooling only unit with puron (r-410a) refrigerant
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P re f er re d™ S er ie s
5 51 J 1 7- 2 8
Si ng le P ac k a ge Ro oft op Coo lin g Onl y U ni t
wi th P u ron
( R- 4 10 A) R ef ri g er an t
®
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . . . . . 19
Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . . . . . 19
Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . . . . . 24
Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . . . 24
Step 7 - Horizontal Duct Connection . . . . . . . . . . . . . . . 25
Step 9 - Assemble Barometric Hood . . . . . . . . . . . . . . . . 27
• BAROMETRIC HOOD (HORIZONTAL CONFIGURA-
TION)
Step 11 - Make Electrical Connections . . . . . . . . . . . . . 28
Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
• CO2 SENSOR WIRING
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53551018-01
Installation Instructions
Page
Printed in U.S.A.
Form II551J-17-28-02
Low Ambient Control (Factory Option) . . . . . . . . . . . . . 48
RTU Open Control System . . . . . . . . . . . . . . . . . . . . . . . . 48
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Step 13 - Install Accessories . . . . . . . . . . . . . . . . . . . . . . 63
Step 14 - Check Belt Tension . . . . . . . . . . . . . . . . . . . . . 63
Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . CL-1

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components.
Only trained and qualified service personnel should install,
repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions
of cleaning coils and filters and replacing filters. All other
operations should be performed by trained service personnel.
When working on air-conditioning equipment, observe
precautions in the literature, tags and labels attached to the
unit, and other safety precautions that may apply.
Follow all safety codes, including ANSI (American National
Standards Institute) Z223.1. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguisher available for all brazing operations.
It is important to 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 the signal words DANGER, WARNING,
CAUTION, and NOTE. 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 may 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.
Pg 1
9-21
Replaces: II551J-17-28-01

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  • Page 1: Table Of Contents

    P re f er re d™ S er ie s 5 51 J 1 7- 2 8 Si ng le P ac k a ge Ro oft op Coo lin g Onl y U ni t wi th P u ron ( R- 4 10 A) R ef ri g er an t ®...

  • Page 2: Electrical Shock Hazard

    DANGER CAUTION ELECTRICAL SHOCK HAZARD PERSONAL INJURY HAZARD Failure to follow this warning will result in personal injury Failure to follow this caution may result in personal injury. or death. Sheet metal parts may have sharp edges or burrs. Use care Before performing service or maintenance operations on and wear appropriate protective clothing, safety glasses and unit, turn off main power switch to unit and install lock(s)
  • Page 3 Position: 9 10 11 12 13 14 15 16 17 Example: Unit Type Packaging, Controls & Indoor Fan Motor 551J = Cooling RTU with Speed Options optional Electric Heat A = Standard Packaging and electro- mechanical controls that require W7212 EconoMi$er ®...
  • Page 4 Fig. 2 — 551J 17 Vertical Airflow...
  • Page 5 Fig. 3 — 551J 17 Horizontal Airflow...
  • Page 6 Fig. 4 — 551J 17 Back View and Condensate Drain Location...
  • Page 7 Fig. 5 — 551J 17 Corner Weights and Clearances...
  • Page 8 Fig. 6 — 551J 17 Bottom View...
  • Page 9 Fig. 7 — 551J 20-24 Vertical Airflow...
  • Page 10 Fig. 8 — 551J 20-24 Horizontal Airflow...
  • Page 11 Fig. 9 — 551J 20-24 Back View and Condensate Drain Location...
  • Page 12 Fig. 10 — 551J 20-24 Corner Weights and Clearances...
  • Page 13 Fig. 11 — 551J 20-24 Bottom View...
  • Page 14 Fig. 12 — 551J 28 Vertical Airflow...
  • Page 15 Fig. 13 — 551J 28 Horizontal Airflow...
  • Page 16 Fig. 14 — 551J 28 Back View and Condensate Drain Location...
  • Page 17 Fig. 15 — 551J 28 Corner Weights and Clearances...
  • Page 18 Fig. 16 — 551J 28 Bottom View...

  • Page 19: Installation

    INSTALLATION 4. Rig and place unit 5. Remove top skid Jobsite Survey 6. Install outside air hood 7. Install smoke detector tube Complete the following checks before installation. 8. Install condensate line trap and piping 1. Consult local building codes and the NEC (National Elec- 9.

  • Page 20: Slab Mount (Horizontal Units Only)

    Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb and not to the HOOD CARTON LOCATION (REAR ACCESS PANEL) unit. Thru-the-base power connection must be installed before the unit is set on the roof curb. If electric and control wiring is to be routed through the base- CONTROL BOX pan, remove knockouts in basepan located in control box area...
  • Page 21 Fig. 19 — Roof Curb Details — 17 Size Unit...
  • Page 22 Fig. 20 — Roof Curb Details — 20 and 24 Size Units...
  • Page 23 Fig. 21 — Roof Curb Details — 28 Size Unit...

  • Page 24: Step 5 - Field Fabricate Ductwork

    Step 19 — Field Fabricate Ductwork Step 20 — Rig and Place Unit Cabinet return-air static pressure (a negative condition) shall Keep unit upright and do not drop. Spreader bars are not re- not exceed 0.5 in. wg (87 Pa) with economizer or without quired if top crating is left on unit.

  • Page 25: Step 7 - Horizontal Duct Connection

    PLACE ALL SEAL STRIPS DETAIL A IN PLACE BEFORE PLACING (914-1371) UNIT ON ROOF CURB. 36"-54" SEE DETAIL A DUCT END DIMENSIONS MAX WEIGHT UNIT 551J*17 2212 1003 127.8 3249 58.7 1491 52.3 1328 551J*20 2422 1099 141.5 3595 71.5 1816 52.3 1328...
  • Page 26 screen into place, and then slide them back into pocket created in the filter support (Item #1). Repeat this for each air screen (see Fig. 27). See Fig. 28 for completed hood HOOD TOP assembly. SHIPPING POSITION Apply seal strip to the back of this flange Apply seal strip...

  • Page 27: Step 9 - Assemble Barometric Hood

    Step 23 — Assemble Barometric Hood The barometric hood can be assembled in vertical or horizontal configuration. Figure 29 illustrates the barometric hood parts. Fig. 29 — Barometric Hood Parts Fig. 32 — Barometric Hood Exploded View BAROMETRIC HOOD (VERTICAL CONFIGURATION) Figure 33 illustrates the installed barometric hood parts.

  • Page 28: Step 10 - Install External Condensate Trap And Line

    4. Using the blade brackets, install the relief damper onto the side of the return duct (see Fig. 35). The two brackets and relief damper are provided with the economizer. Condensate Drain Connection Fig. 35 — Installing CRBARHOD001A00 Over Relief Fig.

  • Page 29: Field Power Supply

    FIELD POWER SUPPLY UNITS WITHOUT FACTORY-INSTALLED NON-FUSED DISCONNECT If equipped with optional powered convenience outlet: the power source leads to the convenience outlet’s transformer pri- When installing units, provide a disconnect switch of adequate mary are not factory connected. Installer must connect these size per NEC (National Electrical Code).

  • Page 30: All Units

    Operation on improper line voltage or excessive phase im- balance constitutes abuse and may cause damage to electri- cal components. Such operation would invalidate any ap- plicable Bryant warranty. UNITS WITHOUT DISCONNECT OR HACR OPTION EQUIP GR LUG DISCONNECT PER NEC Fig.

  • Page 31: Convenience Outlets

    CONVENIENCE OUTLETS GFCI RECEPTACLE COVER - WHILE-IN-USE NOT INCLUDED WEATHERPROOF WARNING ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal injury or death. Units with convenience outlet circuits may use multiple disconnects. Check convenience outlet for power status before opening unit for service.

  • Page 32: Factory Option Thru-Base Connections

    Multi-Protocol Controller (RTU Open is available as a factory- installed option only). Thermostat UNIT CONNECT PRIMARY TRANSFORMER Select a Bryant approved accessory thermostat. When electric VOLTAGE CONNECTIONS TERMINALS heat is installed in the 551J unit, the thermostat must be capa- L1: RED +YEL H1 + H3...

  • Page 33: Electric Heaters

    CENTRAL TERMINAL TYPICAL RUBBER BOARD GROMMET THERMOSTAT CORRECTIONS CORNER POST CAUTION WIRE O/B/Y2 TIES (SEE NOTE) T–STAT NOTE: Typical multi-function marking. Follow manufacturer’s configuration instructions to select Y2. Field Wiring Fig. 47 — Typical Low-Voltage Control Connections THRU THE BASE CONNECTION CAUTION Fig.

  • Page 34: Low-Voltage Control Connections

    INDOOR BLOWER ACCESS PANEL CONTL BOARD MAIN CONTROL FILTER HEATER AREA MODULE Fig. 50 — Typical Component Location Plug ELECTRIC HEATER Assembly TRACKS Field Connections for Field-Installed Electic Heat Elec Htr HCR2 HCR1 Fig. 52 — Accessory Electric Heater Control Connections ELECTRIC HEATER Perfect Humidity™...

  • Page 35: Economi$Er® X (Factory-Installed Option)

    Fig. 53 — Typical Perfect Humidity™ Adaptive Dehumidification System Humidistat Wiring EconoMi$er X (Factory-Installed Option) ® The W7220 economizer module can be used as a stand-alone economizer module wired directly to a commercial set-back PRODUCT DESCRIPTION space thermostat and sensors to provide outside air dry-bulb economizer control.

  • Page 36: Specifications

    three sensors may be configured with the W7220 economizer OUTPUTS module. Actuator Signal: Sensor (optional) 2 to 10 Vdc; minimum actuator impedance is 2k ohm; bus two- The sensor can be added for Demand Controlled Ventilation wire output for bus communicating actuators. (DCV).

  • Page 37: S-Bus Sensor Wiring

    Table 3 — Economizer Module - Left Hand Terminal Blocks LABEL TYPE DESCRIPTION Top Left Terminal Block 20k NTC Mixed Air Temperature Sensor (Polarity and COM Insensitive Connection) 20k NTC Outdoor Air Temperature Sensor (Polarity and COM Insensitive Connection) S-BUS S-BUS Enthalpy Control Sensor S-BUS...

  • Page 38: Interface Overview

    4. Press the (Enter) button to display the value of the SENSOR currently displayed item. 5. Press the ▲ button to increase (change) the displayed parameter value. (HOT) BLACK 6. Press the ▼ button to decrease (change) the displayed parameter value. YELLOW NOTE: When values are displayed, pressing and holding the ▲...
  • Page 39 Table 7 — Menu Structure PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT FIRST STAGE COOLING DEMAND (Y1–IN) ECONO AVAIL YES/NO YES = economizing available; the system can use outside air for free cooling when required FIRST STAGE COOLING RELAY OUTPUT ECONOMIZING YES/NO YES = outside air being used for 1 stage cooling...
  • Page 40 Table 7 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT MECH COOL ON Displays stage of mechanical cooling that is active. 0, 1, or 2 HEAT STAGES ON Displays the stage of heat pump heating that is active. STATUS (cont) SUPPLY FAN SPEED FAN SPEED...
  • Page 41 Table 7 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT In CONV mode: SD + Enables configuration of shutdown (default); W = Informs controller that system is in heating mode. NOTE: If using 2-speed fan mode, you must program CONV SD/W or HP(O)/ AUX2 IN mode for W.
  • Page 42 Table 7 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT RETURN AIR HUMIDITY CALIBRATION RA H CAL 0% RH ±10% RH Allows for operator to adjust for an out of calibration humidity sensor. DISCHARGE AIR TEMPERATURE CALIBRATION ADVANCED DA T CAL 0.0°F...
  • Page 43 Table 7 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT ACTUATOR VOLTAGE HIGH ACT OVER V Voltage received by actuator is below expected range. ALARMS (cont) ACTUATOR STALLED ACT STALLED Actuator stopped before achieving commanded position. LEGEND 4.
  • Page 44 Table 10 — Dry Bulb Operation With DCV (CO Sensor) — 1 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE HIGH 0v/Off 0v/Off VENTMIN Closed HIGH 24v/On 0v/Off VENTMIN Closed HIGH 24v/On 24v/On...
  • Page 45 Table 13 — Dry Bulb Operation No DCV (CO Sensor) — 2 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE 0v/Off 0v/Off MIN POS Closed 24v/On 0v/Off MIN POS Closed HIGH 24v/On 24v/On...

  • Page 46: Enthalpy Settings

    Table 16 — Enthalpy Operation With DCV (CO Sensor) — 2 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE 0v/Off 0v/Off VENTMIN Closed 24v/On 0v/Off VENTMIN Closed HIGH 24v/On 24v/On VENTMIN Closed 0v/Off...

  • Page 47: Two-Speed Fan Operation

    boundary is ES1 when there are no stages of mechanical Initial Menu Display cooling energized and HL (high limit) when a compressor On initial start-up, Honeywell displays on the first line and stage is energized. economizer W7220 on the second line. After a brief pause, the Table 17 provides the values for each boundary limit.

  • Page 48: Low Ambient Control (Factory Option)

    RTU Open Control System For details on operating units equipped with the factory-in- CAUTION stalled RTU Open controller, refer to the “Factory-Installed RTU Open Multi-Protocol Controller Control, Start-Up, Oper- EQUIPMENT DAMAGE HAZARD ation and Troubleshooting” manual. Failure to follow this caution may result in equipment See Fig.
  • Page 49 Fig. 60 — RTU Open System Control Wiring Diagram...
  • Page 50 Fig. 61 — RTU Open System Control Wiring Diagram with Perfect Humidity System Option ™...
  • Page 51 Fig. 62 — 551J Control Diagram — D17-D24 (208/230-3-60, 460/575-3-60); D28 (460/575-3-60)
  • Page 52 Fig. 63 — 551J Control Diagram for D28 (208/230-3-60)
  • Page 53 Fig. 64 — 551J D17-D24 Power Diagram (208/230-3-60)
  • Page 54 Fig. 65 — 551J D17-D28 Power Diagram (460/575-3-60)
  • Page 55 Fig. 66 — 551J D28 Power Diagram (208/230-3-60)
  • Page 56 Fig. 67 — 551J Control Diagram with Perfect Humidity™ System – D17-D24 (208/230-3-60, 460/575-3-60), D28 (460/575-3-60)
  • Page 57 Fig. 68 — 551J D28 Control Diagram with Perfect Humidity System (208/230-3-60) ™...
  • Page 58 Fig. 69 — 551J D17-D24 Power Diagram with Perfect Humidity System (208/230-3-60) ™...
  • Page 59 Fig. 70 — 551J D17-D28 Power Diagram with Perfect Humidity System (460-3-60) ™...
  • Page 60 Fig. 71 — 551J D17-D28 Power Diagram with Perfect Humidity System (575-3-60) ™...
  • Page 61 Fig. 72 — 551J D28 Power Diagram with Perfect Humidity System (208/230-3-60) ™...

  • Page 62: Smoke Detectors

    Smoke Detectors Smoke detectors are available as factory-installed options on 551J models. Smoke detectors may be specified for supply air only, for return air without or with economizer, or in combina- tion of supply air and return air. Return-air smoke detectors are arranged for vertical return configurations only.

  • Page 63: Step 12 - Adjust Factory-Installed Options

    UNIT WITHOUT ECONOMIZER OR ECONOMIZER 2 POSITION DAMPER 2 POSITION DAMPER Fig. 76 — EconoMi$er IV Wiring ® Step 26 — Adjust Factory-Installed Options • Thermostat/Sensors • sensor ECONOMI$ER IV OCCUPANCY SWITCH • Louvered hail guard Refer to Fig. 76 for general EconoMi$er IV wiring. External •...

  • Page 64: Belt Tension Method

    BELT TENSION METHOD BELT DEFLECTION FORCE - SEE TABLE 1 Requires belt tension gage that measures tension in belt in units of lbs force. DEFLECTION = BELT SPAN BLOWER PULLEY STRAIGHT EDGE V-BELT SCREW SCREW MOTOR PULLEY MOTOR TORQUE ALL SHEAVE SET SCREWS TO 110-130 in. lbs BELT DEFLECTION FORCE (LBS) BELT SMALLEST...
  • Page 66 Printed in U.S.A. Form No: II551J-17-28-02 © 2021 Carrier Cat. No. 04-53551018-01 Edition Date: 9-21 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. Replaces:II551J-17-28-01...

  • Page 67: Preliminary Information

    START-UP CHECKLIST (Remove and use for job file) NOTE: To avoid injury to personnel and damage to equipment or prop- erty when completing the procedures listed in this start-up checklist, use good judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preceding sections of this Installation Instructions document.
  • Page 68 Verify that 3-phase fan motor and blower are rotating in correct direction (Y/N) _____ Verify that 3-phase scroll compressor is rotating in the correct direction (Y/N) _____ Verify refrigerant charge using charging charts (Y/N) _____ GENERAL Economizer minimum vent and changeover settings to job requirements (if equipped) (Y/N) _____ IV.

This manual is also suitable for:

Preferred 551j d17 seriesPreferred 551j d20 seriesPreferred 551j d24 seriesPreferred 551j d28 series

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