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 EconoMi$er X (Factory- - Installed Option) ..Troubleshooting ......Product Description .
Page 3: Safety Considerations
SAFETY CONSIDERATIONS WARNING Improper installation, adjustment, alteration, service, ELECTRICAL SHOCK HAZARD maintenance, or use can cause explosion, fire, electrical shock or other conditions which may cause personal Failure to follow this warning could cause personal injury or property damage. Consult a qualified installer, injury or death.
Page 4: Rated Indoor Airflow (Cfm)
Rated Indoor Airflow (cfm) Model Number Full Load Airflow (cfm) 548J*14D 4500 The table to the right lists the rated indoor airflow used for the AHRI efficiency rating for the units covered in this document. Position: 12 13 14 15 16 17 Example: Unit Type Packaging and 2-Speed Indoor Fan Motor...
Page 5 a548J--- 011 Fig. 2 - - Unit Dimensional Drawing – Size 14 Unit...
Page 6 a548J--- 012 Fig. 2 - - Unit Dimensional Drawing – Size 14 Unit (cont)
Page 7: Refrigeration System Components
C09897B LOCATION DIMENSION CONDITION 48--- in (1219 mm) Unit disconnect is mounted on panel 18--- in (457 mm) No disconnect, convenience outlet option 18--- in (457 mm) Recommended service clearance 12--- in (305 mm) Minimum clearance 42--- in (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall) 36--- in (914 mm) Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass)
Page 8 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 9: Installation
INSTALLATION Review the following for recommended sequences for installation steps. Jobsite Survey Curb- - Mounted Installation — Complete the following checks before installation. Install curb 1. Consult local building codes and the NEC (National Install field- - fabricated ductwork inside curb Electrical Code) ANSI/NFPA 70 for special installa- Install accessory thru- - base service connection package tion requirements.
Page 10 a548J--- 013 Fig. 6 - - Roof Curb Details...
Page 11: Slab Mount (Horizontal Units Only)
CAUTION PROPERTY DAMAGE HAZARD Failure to follow this caution may result in damage to roofing materials. Membrane roofs can be cut by sharp sheet metal MAXIMUM ALLOWABLE edges. Be careful when placing any sheet metal parts DIFFERENCE IN. (MM) on such roof. 0.5″...
Page 12: Step 7 - Convert To Horizontal And Connect
PLACE ALL GASKET IN PLACE BEFORE PLACING UNIT ON ROOF CURB. 914 - 1371 “B” ( 36” - 54” ) “C” DETAIL “A” DUCT END “A” SEE DETAIL “A” C10281 DIMENSIONS MAX WEIGHT UNIT 548J*14D 2015 116.0 2945 55.5 1410 59.5 1510 NOTES:...
Page 13: Two Position Damper Hood Removal And Setup
Two Position Damper Hood Removal and Setup - - Factory Option — 1. The hood is shipped in knock- - down form and assembled to a metal support tray using plastic stretch wrap. Located in the return air compartment, the assembly’s metal tray is attached to the basepan and also attached to the damper using two plastic tie- - wraps.
Page 14: Step 9 - - Install External Condensate Trap And Line
Step 9 — Install External Condensate Trap and PANEL Line The unit has one -in. condensate drain connection on the end of the condensate pan and an alternate connection on the bottom. See Fig. 17. Unit airflow configuration INDOOR COIL does not determine which drain connection to use.
Page 15: Step 10 - Make Electrical Connections
Step 10 — Make Electrical Connections WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Do not use gas piping as an electrical ground. Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur.
Page 16: All Units
Failure to follow this caution may result in equipment (See Fig. 24.) damage. Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Bryant warranty. ELECTRIC DISCONNECT SWITCH COPPER WIRE ONLY...
Page 17 a50--- 9707 Fig. 26 - - Typical 548J Size 14 Control Wiring Diagram...
Page 18 2%, contact your local electric utility company immediately. AC = 226 v Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to (224 + 231 + 226) Average Voltage = electrical components. Such operation would invalidate any applicable Bryant warranty.
Page 19: Units Without Factory- - Installed
Units Without Factory- - Installed 9. Install the handle on to the painted cover horizontally Non- - Fused Disconnect — with the red arrow pointing to the left. 10. Secure the handle to the painted cover with (2) screws When installing units, provide a disconnect switch of and lock washers supplied.
Page 20 Duty Cycle: the unit- - powered convenience outlet has a duty cycle limitation. The transformer is intended to Pwd-CO provide power on an intermittent basis for service tools, Fuse Switch lamps, etc; it is not intended to provide 15- - amps loading for continuous duty loads (such as electric heaters for overnight use).
Page 21: Factory- - Option Thru- - Base Connections
- party Building Management System or the RTU Open controller (RTU Open controller is available as a factory- - installed option only). Thermostat — BASE PLATE FOR Install Bryant- - approved accessory stage GFCI RECEPTACLE Cooling/Heating thermostat according to installation C09022 Fig.
Page 22: Central Terminal Board
insulated wire [35_C (95_F) minimum]. For over 75 ft. (23 m), use no. 14 AWG insulated wire [35_C (95_F) minimum]. All wire sizes larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat. Typical Central Thermostat...
Page 23 Table 5 – 548J Defrost Board I/O and Jumper Configurations Inputs Point Name Type of I/O Connection Pin Number Unit Connection Note G Fan DI, 24Vac P2--- 3 CTB--- G Y1 Cool 1 DI, 24Vac P2--- 5 CTB--- Y1 Y2 Cool 2 DI, 24Vac P2--- 4 CTB--- Y2...
Page 24: Unit Without Thru- - Base Conversion Kit
The continuous run period is a fixed time period between the end of the last defrost cycle (or start of the current Heating cycle) during which no defrost will be permitted. This period can be set at 30, 60, 90 or 120 minutes by changing the positions of DIP switches SW1 and SW2 (see Fig.
Page 25: Single Point Boxes
SINGLE HEATER MANUAL RESET POINT BOX COVERS LIMIT SWITCH DISCONNECT MOUNTING LOCATION SINGLE POINT HEATER HEATER HEATER MODULE MODULE MOUNTING MOUNTING (LOCATION 1) (LOCATION 2) BRACKET SCREW C10029 Fig. 39 - - Typical Component Location Single Point Boxes Heater and Supplementary Fuses — When heaters are installed, power wiring to both heaters When the unit MOCP device value exceeds 60- - A, and the rest of the unit is connected via the single point...
Page 26: Speed Indoor Fan Motor System With Variable
NOTE: Optional Outdoor Temperature Control at One Heater Stage – Move either heater wire to this terminal and connect outdoor temperature switch between 2nd and 3rd terminals. C10354 Fig. 41 - - Accessory Electric Heater Control Connections 2- -Speed Indoor Fan Motor System with Variable Frequency Drive (Factory Option) For details on operating 548J 2 stage cooling units equipped with the factory installed Variable Frequency Drive (VFD)
Page 27: 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 28: 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 29: Co 2 Sensor Wiring
for the power supplies are common. See Fig. 45 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. 45 - - Wiring for CO Sensor Interface Overview This section describes how to use the economizer’s user...
Page 30: 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 31 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 32 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 33 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 34 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 35 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 36: 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 37 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 38 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 39 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 40: Enthalpy Settings
ECONOMIXING DUAL ENTHALPY AVAILABLE HIGH LIMIT NOT AVAILABLE SINGLE ENTHALPY P2 (T,RH) (T,RH) TEMPERATURE C12015 Fig. 47 - - Single Enthalpy Curve and Boundaries Table 21 – Single Enthalpy and Dual Enthalpy High Limit Curves (EN Units) Point P1 Point P2 Enthalpy Temp.
Page 41: Checkout
After the delay one of two actions will happen: NOTE: See “Interface Overview” on page 29 for information about menu navigation and use of the keypad. S The Y2 In call will be satisfied with the damper 100% To perform a Checkout test: open and fan on high speed and the call will turn off 1.
Page 42: Rtu Open Controller System
NOTE: The RTU Open controller acts as an intelligent The RTU Open controller is an integrated component of the imbedded thermostat. A room thermostat cannot be used Bryant rooftop unit. Its internal application programming with the RTU Open controller. provides optimum performance and energy efficiency. The...
Page 43 a50--- 9711 Fig. 49 - - RTU Open Controller System Wiring Diagram...
Page 44: 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 45: Economi$Er 2
Connect T- - 56: See Fig. 53 for T- - 56 internal connections. Install a jumper between SEN and SET terminals as There are two types of SPT sensors available from Bryant, illustrated. Connect T- - 56 terminals to the RTU Open resistive input non-communicating (T55, T56, and T59) controller at J20- - 1, J20- - 2 and J20- - 3 per Fig.
Page 46: Indoor Air Quality (Co 2) 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. 55 supply ducts, open windows, fans, or over heat sources. for internal connections at the T- - 59.
Page 47: Outdoor Air Quality Sensor
Outdoor Air Quality Sensor Space Relative Humidity Sensor or Humidistat — (P/N 33ZCSENCO2 plus weatherproof enclosure) — The Space Relative Humidity Sensor is not used with 548J The outdoor air CO sensor is designed to monitor carbon units at this time. dioxide (CO ) levels in the outside ventilation air and Smoke Detector/Fire Shutdown (FSD) —...
Page 48: Communication Wiring - - Protocols
Different protocols exist to provide different switch settings. kinds of information for different applications. In the BAS Contact your Bryant applications engineer for more application, many different protocols are used, depending detailed information on protocols, third party wiring, and on manufacturer.
Page 49: Local Access
Local Access Field Assistant: Field Assistant is a computer program included with the purchase of the Tech Tool Kit (USB-TKIT). This is a field Tech Tool to set-up, service, Wall Mounted Equipment Toucht Interface: The or download application software to the RTU Open Equipment Touch interface is a wall mounted unit used to controller and includes a USB Link Cable.
Page 50: Outdoor Air Enthalpy Control
NOTE: Refer to the RTU Open Multi- - Protocol Controller Enthalpy Controls, Start- - Up, Operation and Troubleshooting manual. Switch PL6-1 (24-V) Contact your Bryant applications engineer for details on configuration and troubleshooting of connected networks. PL6-4 (COM) Outdoor Air Enthalpy Control CTB ECON...
Page 51: Smoke Detectors
Return Air PL6-1 (24-V) Smoke Detector – 4-20 (as shipped) Main PL6-4 (COM) + VDC CTB ECON (RTU Open: to J2-6) Outside Air Enthalpy Switch + 24-36 Return Air VDC In Enthalpy Sensor – 4-20 Main C11170 Fig. 65 - - Outside and Return Air Enthalpy Sensor Wiring Smoke D etectors...
Page 52: Step 11 - Adjust Factory- -Installed Options
Unit Without Economizer or Economizer 2 Position Damper 2 Position Damper C08631 Fig. 68 - - EconoMi$er IV Wiring Step 11 — Adjust Factory- -Installed Options Time Guard II compressor anti- - cycle control Outdoor coil protector grille Smoke Detectors — Head pressure control Smoke detector(s) will be connected at the Central Terminal Programmable setback thermostat...
Page 53 Adjust belt tension by loosing the motor mounting plate (to increase tension). Ensure the blower shaft and motor front bolts and rear bolt (see Fig. 70) and slide the plate shaft are parallel to each other (pulleys aligned). Tighten towards the fan (to reduce tension) or away from the fan all bolts securely when finished.
Page 54 Catalog No. II548J---14---01 E2017 Bryant Heating & Cooling Systems Edition Date: 12/17 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. Replaces: II548J--- 07...
Page 55: Unit 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---14---01 E2017 Bryant Heating & Cooling Systems Edition Date: 12/17 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.

Bryant 548J*14D Series Installation Instructions Manual

Theinstallation.

Safety Considerations

Refrigeration System Components

Installation

Step 9 - - Install External Condensate Trap and Line

Step 10 - Make Electrical Connections

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

Specifications

Interface Overview

Menu Structure

Setup and Configuration

Sequence of Operation

Enthalpy Settings

Two- -Speed Fan Operation

Checkout

Unit Start- - up Checklist

Quick Links

TABLE OF CONTENTS

Troubleshooting

Related Manuals for Bryant 548J*14D Series

Summary of Contents for Bryant 548J*14D Series

Table of Contents