Page 1: Table Of Contents
PURON (R- -410A) REFRIGERANT Installation Instructions 548J units for installation in the United States contain use of Bryant's 2-speed indoor fan control system. This complies with the U.S. Department of Energy (DOE) efficiency standard of 2018. 548J units for installation outside the United States may or may not contain use of the 2-speed indoor fan control system as they are not required to comply with the U.S.
Page 2: Safety Considerations
Setup and Configuration ..... . . Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloths for brazing operations and Time- - out and Screensaver .
Page 3: Rated Indoor Airflow (Cfm)
Rated Indoor Airflow (cfm) CAUTION The table to the right lists the rated indoor airflow used CUT HAZARD for the AHRI efficiency rating for the units covered in this document. Failure to follow this caution may result in personal injury. Full Load Airflow (cfm) Model Number Sheet metal parts may have sharp edges or burrs.
Page 4 a548J--- 015 Fig. 2 - - Unit Dimensional Drawing – Size 17 Units...
Page 5 a548J--- 016 Fig. 2 - - Unit Dimensional Drawing – Size 17 Units (cont)
Page 6 a548J--- 017 Fig. 2 - - Unit Dimensional Drawing – Size 17 Units (cont)
Page 7 a548J--- 018 Fig. 3 - - Unit Dimensional Drawing – Size 24 Units...
Page 8 a548J--- 019 Fig. 3 - - Unit Dimensional Drawing – Size 24 Units (cont)
Page 9 a548J--- 020 Fig. 3 - - Unit Dimensional Drawing – Size 24 Units (cont)
Page 10: Refrigeration System Components
C12392 LOCATION DIMENSION CONDITION 36---in. (914 mm) • Recommended clearance for air flow and service 42---in. (1067 mm) • Recommended clearance for air flow and service • No Convenience Outlet • No Economizer 18---in. (457 mm) • No field installed disconnect on economizer hood side (Factory ---installed disconnect installed). •...
Page 11 Table 2 – Heating Mode (each circuit) Table 3 – Defrost Mode Component Status/Position Component Status/Position Defrost Thermostat Closed Reversing Valve De--- energized Outdoor Fan(s) Check Valve A Open Reversing Valve Energized Check Valve B Closed Check Valve A Closed Check Valve C Open Check Valve B...
Page 12: Installation
INSTALLATION on curb- - mounted units, some accessories must be installed on the unit before the unit is placed on the curb. Jobsite Survey Review the following for recommended sequences for installation steps. Complete the following checks before installation. Curb- - Mounted Installation — 1.
Page 13 C10139 Fig. 7 - - Roof Curb Details – Size 17 Units...
Page 14 C10140 Fig. 8 - - Roof Curb Details – Size 24 Units...
Page 15: Slab Mount (Horizontal Units Only)
For vertical ducted applications, secure all ducts to roof curb and building structure. Do not connect ductwork to unit. Insulate and weatherproof all external ductwork, joints, and roof openings with counter flashing and mastic in accordance with applicable codes. Ducts passing through unconditioned spaces must be insulated and covered with a vapor barrier.
Page 16: Positioning On Curb
PLACE ALL SEAL STRIP DETAIL A IN PLACE BEFORE PLACING "914-1371" UNIT ON ROOF CURB. (36"-54") "B" SEE DETAIL A DUCT END "C" "A" C09107 DIMENSIONS MAX WEIGHT UNIT 548J*17 D 2070 127.8 3249 58.7 1491 52.3 1328 548J*24 D 2358 1071 141.5...
Page 17: Step 9 - Install External Condensate Trap And Line
2. Install four angles to the upper end panel using the screws provided Hood Top 3. Apply seal strip to mating flanges on the side plates Shipping Position of the hood (see Fig. 15). 4. Secure side plates to panel using the screws provided. 5.
Page 18: Step 10 - Make Electrical Connections
is acceptable in your area.) If a de- - energize via unit disconnect switch operation of the convenience outlet is desired, connect the source leads to the load side of the MINIMUM PITCH 1” (25mm) PER unit disconnect. On a unit without a unit- - mounted BASE RAIL 10’...
Page 19 a50--- 9696 Fig. 20 - - 548J 17- - 24 Control Wiring Diagram with VFD Option...
Page 20 a50--- 9697 Fig. 21 - - Typical 548J 17- - 24 Power Wiring Diagram (208/230V 3 Phase 60Hz unit shown)
Page 21: All Units
C12385 Fig. 22 - - Handle and Shaft Assembly for NFD electrical components. Such operation would invalidate any applicable Bryant warranty. All Units - - All field wiring must comply with NEC and all local code requirements.
Page 22: Convenience Outlets
Voltage to compressor terminals during operation must be A 20 amp non- - powered convenience outlet is available as within voltage range indicated on unit nameplate. On a field- - installed accessory. 3- - phase units, voltages between phases must be balanced Non- - powered type: This type requires the field within 2% and the current within 10%.
Page 23: Factory- - Option Thru- - Base Connections
Loosen the two screws at the GFCI duplex outlet, until approximately -in. (13 mm) under screw heads are Select a Bryant- - approved accessory thermostat. The 548J exposed. Press the gasket over the screw heads. Slip the models do not require a thermostat with an O function to backing plate over the screw heads at the keyhole slots control the reversing valve operation.
Page 24: Central Terminal Board
larger than no. 18 AWG cannot be directly connected to Central Terminal Board the thermostat and will require a junction box and splice at the thermostat. The Central Terminal Board (CTB) is a pass through connection point. The CTB provides the capability to add factory- - installed options and field- - installed accessories to Central the units by cutting jumper wires without having to change...
Page 25 Compressor control — The DFB receives inputs indicating Stage 1 Cooling, Stage 2 Cooling and Stage 1 Heating from the space thermostat or unit control system (RTU Open controller); it generates commands to start compressors with or without reversing valve operation to produce Stage 1 Cooling (one compressor runs), Stage 2 Cooling (both compressors run) or Stage 1 Heating (both compressors run).
Page 26: Units Without Thru- - Base Connection Kit
Auxiliary (Electric) Heat control — The 548J unit can be and then route the wire behind the corner post utilizing the equipped with one or two auxiliary electric heaters, to factory provided wire ties secured to the control box. This provide a second stage of heating.
Page 27: Electric Heaters
Electric Heaters Electric Heater Tracks 548J units may be equipped with field- - installed accessory electric heaters. The heaters are modular in design. Heater modules are installed in the compartment below the indoor blower access panel. Access is through the electric heat access panel.
Page 28: Economi$Er R X (Factory- -Installed Option)
EconoMi$er X (Factory- -Installed Option) Specifications W7220 Economizer Module — The module is designed for use with 2 to 10 Vdc or bus communicating actuator. The module includes terminals for CO sensor, mixed air sensor, and an outdoor dry bulb sensor.
Page 29: Outputs
Outputs — Table 7 – Economizer Module - - Left Hand Terminal Blocks Actuator signal: 2- - 10 Vdc; minimum actuator impedance is 2k ohm; bus two- - wire output for bus communicating Label Type Description actuators. Top Left Terminal Block Exhaust fan, Y1, Y2 and AUX1 O: 20k NTC Supply Air Temperature Sensor...
Page 30: Co 2 Sensor Wiring
for the power supplies are common. See Fig. 39 for CO sensor wiring. SENSOR (HOT) BLACK YELLOW ANALOG BROWN – Switch ORANGE Label GREEN POWER SUPPLY. PROVIDE DISCONNECT Switches MEANS AND OVERLOAD PROTECTION AS REQUIRED. C14158 Fig. 39 - - Wiring for CO Sensor Interface Overview S-Bus...
Page 31: Menu Structure
To use the keypad when working with menus: S SYSTEM SETUP S Press the (Up arrow) button to move to the previous S ADVANCED SETUP menu. S CHECKOUT S Press the (Down arrow) button to move to the next S ALARMS menu.
Page 32 Table 11 - - Menu Structure (cont) Parameter Parameter EXPANDED PARAMETER NAME Menu Parameter Default Range and Increment Notes Value STATUS COOL Y1 ---IN ON/OFF FIRST STAGE COOLING DEMAND (Y1---IN) (cont) Y1---I signal from space thermostat or unitary controller for Cooling Stage 1. = 24 Vac on terminal Y1---I OFF = 0 Vac on terminal Y1---I COOL Y1 ---OUT...
Page 33 Table 11 - - Menu Structure* (cont) Parameter Parameter EXPANDED PARAMETER NAME Menu Parameter Default Range and Increment Notes Value SETPOINTS MAT SET 53_F 38 to 70_F; SUPPLY AIR SETPOINT (12_C) (3 to 21_C) Setpoint determines where the economizer will modulate the OA damper to increment by 1 maintain the mixed air temperature.
Page 34 Table 11 - - Menu Structure* (cont) Parameter Parameter EXPANDED PARAMETER NAME Menu Parameter Default Range and Increment Notes Value SYSTEM INSTALL 01/01/10 Display order = MM/DD/YY SETUP Setting order = DD, MM, then YY . UNITS DEG _F or _C Sets economizer controller in degrees Fahrenheit or Celsius.
Page 35 Table 11 - - Menu Structure (cont) Parameter Parameter EXPANDED PARAMETER NAME Menu Parameter Default Range and Increment Notes Value ADVANCED MAT T CAL 0.0_F +/ ---2.5_F SUPPLY AIR TEMPERATURE CALIBRATION SETUP (or C) (+/ ---1.4_C) Allows for the operator to adjust for an out of calibration supply air (cont) temperature (SAT) sensor OAS T CAL...
Page 36 Table 11 - - Menu Structure* (cont) Parameter Parameter EXPANDED PARAMETER NAME Menu Parameter Default Range and Increment Notes Value ALARMS(#) Alarms display only when they are active. The menu title “ALARMS(#)” includes the number of active alarms in parenthesis ( ). When using S---Bus sensors, “SYLK”...
Page 37: Sequence Of Operation
Table 12 – Damper Minimum Position Settings and Readings on Checkout Menu Demand Controlled Ventilation Fan Speed Setpoints Checkout Sensor) MIN POS VMAX ---HS MIN POS H VMAX ---HS MIN POS L VMAX ---LS VENT MIN VMIN ---HS VENT MAX VMAX ---HS VENT MIN H VMIN ---HS...
Page 38 Table 15 – Enthalpy Operation No DCV (CO Sensor) - - 1 Speed Fan Demand Outside Air --- Controlled Good to Y1‐I Y2-I Fan Speed Y1-O Y2-O Occupied Unoccupied Ventilation economize? (DCV) High 0-v/Off 0-v/Off MIN POS Closed High 24-v/On 0-v/Off MIN POS Closed...
Page 39 Table 17 – Dry Bulb Operation No DCV (CO Sensor) - - 2 Speed Fan Demand Outside Air --- Controlled Good to Y1‐I Y2-I Fan Speed Y1-O Y2-O Occupied Unoccupied Ventilation economize? (DCV) 0-v/Off 0-v/Off MIN POS L Closed 24-v/On 0-v/Off MIN POS L Closed...
Page 40: Enthalpy Settings
Table 19 – Enthalpy Operation No DCV (CO Sensor) - - 2 Speed Fan Demand Outside Air --- Controlled Good to Y1‐I Y2-I Fan Speed Y1-O Y2-O Occupied Unoccupied Ventilation economize? (DCV) 0-v/Off 0-v/Off MIN POS L Closed 24-v/On 0-v/Off MIN POS L Closed High...
Page 41: Checkout
ECONOMIZING DUAL ENTHALPY AVAILABLE HIGH LIMIT NOT AVAILABLE SINGLE ENTHALPY P2 (T,RH) (T,RH) TEMPERATURE a50--- 9997 Fig. 41 - - Single Enthalpy Curve and Boundaries Table 21 – Single Enthalpy and Dual Enthalpy High Limit Curves (EN Units) Point P1 Point P2 Enthalpy Temp.
Page 42: Power Loss (Outage Or Brownout)
Power Loss (Outage or Brownout) — Troubleshooting All setpoints and advanced settings are restored* after any Alarms — power loss or interruption. The economizer module provides alarm messages that * All settings are stored in non--- volatile flash memory. display on the 2- - line LCD. Status —...
Page 43: Rtu Open Control System
FIOP/accessory EconoMi$er 2 package. The RTU Open controller is an integrated component of the Bryant rooftop unit. Its internal application programming provides optimum performance and energy efficiency. RTU Open controller enables the unit to run in 100% stand- - alone control mode or to run a Third Party Building Automation System (BAS).
Page 44 a50--- 9699 Fig. 44 - - RTU Open System Control Wiring Diagram...
Page 45: Supply Air Temperature (Sat) Sensor
Refer to the input configuration and accessory sections of the RTU Open Multi--- Protocol Controller Controls, Start--- Up, Operation and Troubleshooting manual for more detail. The RTU Open controller requires the use of a Bryant space sensor. A standard thermostat cannot be used with the RTU Open system.
Page 46: Economi$Er R 2
Space Temperature (SPT) Sensors — Connect T- - 56: See Fig. 48 for T- - 56 internal connections. SPT sensors available from Bryant are resistive input Install a jumper between SEN and SET terminals as non-communicating (T55, T56, and T59) sensors. These illustrated.
Page 47: Indoor Air Quality (Co ) Sensor
Connect T- - 59: The T- - 59 space sensor requires a Do not mount the IAQ sensor in drafty areas such as near separate, isolated power supply of 24 VAC. See Fig. 50 supply ducts, open windows, fans, or over heat sources. for internal connections at the T- - 59.
Page 48: Outdoor Air Quality Sensor
Outdoor Air Quality Sensor Smoke Detector/Fire Shutdown (FSD) — (P/N 33ZCSENCO2 plus weatherproof enclosure) — On 548J units equipped with factory- - installed Smoke The outdoor air CO sensor is designed to monitor carbon Detector(s), the smoke detector controller implements the unit shutdown through its NC contact set connected to the dioxide (CO ) levels in the outside ventilation air and...
Page 49: Connecting Discrete Inputs
MENU Config Inputs input 3, 5, 8, or 9 to Remote    Contact your Bryant applications engineer for more Occupancy and normally open (N/O) or normally closed detailed information on protocols, third party wiring, and (N/C). networking.
Page 50: Local Access
LEDs will appear. See Table 23. NOTE: Refer to the RTU Open Multi- - Protocol Controller Controls, Start- - Up, Operation and Troubleshooting manual. Contact your Bryant applications engineer for details on configuration and troubleshooting of connected networks. C10816 Fig. 59 - - Network Wiring...
Page 51: Outdoor Air Enthalpy Control
Access Port LOCAL ACCESS RNET PORT Connect to +12 DVC Rnet- computer’s Rnet+ CR2032 USB port Connect to UI-10 the Local UI-11 Access port USB Link Kit RTU Open Controller C14131 Fig. 60 - - PC Running Field Assistant Table 23 – LEDs The LEDs on the RTU Open show the status of certain functions If this LED is on...
Page 52: Differential Enthalpy Control
Locate the enthalpy control in the economizer next to the Return Air Sampling Tube (Shipping Location) Actuator Motor. Locate two GRA leads in the factory harness and connect the gray lead labeled “ESL” to the terminal labeled “LOW”. See Fig. 61. Connect the enthalpy control power input terminals to economizer actuator power leads RED (connect to 24V) and BLK (connect to GND).
Page 53: Smoke Detector Test Magnet
the tube, facing into the bottom return duct opening for Thru- - base connection kit (must be installed before unit vertical unit’s and on the side of the tube, facing the is set on curb) unit’s end panel for horizontal units. Manual outside air damper 4.
Page 54 C11504 Fig. 68 - - Belt Drive Motor Mounting Catalog No. II548J---17---24---02 E2018 Bryant Heating & Cooling Systems Edition Date: 01/18 Printed in U.S.A. Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Page 55: Start- - Up Checklist
UNIT START-UP CHECKLIST (Remove and Store in Job File) NOTE: To avoid injury to personnel and damage to equipment or property when completing the procedures listed in this start---up checklist, use good judgement, follow safe practices, and adhere to the safety considerations/information as outlined in the preceding sections of this Installation Instructions document.
Page 56 ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS (IF EQUIPPED) j VERIFY SMOKE DETECTOR UNIT SHUTDOWN BY UTILIZING MAGNET TEST Catalog No. II548J---17---24---02 E2018 Bryant Heating & Cooling Systems Edition Date: 01/18 Printed in U.S.A. Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

This manual is also suitable for:

548j*17 series 548j*24 series 548j*17 d series 548j*24 d series

Bryant 548J***D Series Installation Instructions Manual

Theinstallation.

Safety Considerations

Refrigeration System Components

Installation

Central Terminal Board

Commercial Defrost Board

Electric Heaters

Economi$Er R X (Factory- -Installed Option)

Specifications

Menu Structure

Start- - up Checklist

Quick Links

TABLE OF CONTENTS

Troubleshooting

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Summary of Contents for Bryant 548J***D Series

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Table of Contents