Page 1: Table Of Contents
Legacy™ Line 548J07 Single Package Rooftop with Heat Pump with Puron (R-410A) Refrigerant ® Installation Instructions 548J 07 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.
Page 2: Safety Considerations
SAFETY CONSIDERATIONS Installation and servicing of air-conditioning equipment can be WARNING hazardous due to system pressure and electrical components. PERSONAL INJURY AND ENVIRONMENTAL HAZARD Only trained and qualified service personnel should install, re- pair, or service air-conditioning equipment. Failure to follow this warning could cause personal injury or death.
Page 3 2 3 4 5 6 7 8 5 4 8 J P 0 7 A 0 0 0 A 1 B 0 A D Unit Type Packaged heat pump with optional electric heat Packaging and 2-Speed Indoor Fan Motor A — Standard packaging B —...
Page 4 Fig. 2 — Dimensional Drawing for Units Built On or After 4/15/19...
Page 5 Fig. 3 — Dimensional Drawing for Units Built Prior to 4/15/19...
Page 6 Fig. 4 — Corner Weights and Clearances...
Page 7 Fig. 5 — Base Rail Details...
Page 8 Fig. 6 — Thru-the-Base Charts...
Page 9: Refrigeration System Components
REFRIGERATION SYSTEM COMPONENTS Table 2 — Cooling Mode (each circuit) Each heat pump refrigeration system includes a compressor, accumulator, reversing valve, dual-function outdoor coil with COMPONENT STATUS/POSITION vapor header check valve, cooling liquid line with a filter drier Reversing Valve Energized and a check valve, dual-function indoor coil with a vapor head- Check Valve A...
Page 10: Installation
SEAT CORE (Part No. EC39EZ067) 1/2-20 UNF RH 0.596 45° 30° WASHER DEPRESSOR PER AHRI 720 O-RING 1/2” HEX +.01/-.035 5/8” HEX 0.47 FROM FACE OF BODY This surface provides a metal to metal seal when 7/16-20 UNF RH torqued into the seat. Appropriate handling is required to not scratch or dent the surface.
Page 11: Pad-Mounted Installation
PAD-MOUNTED INSTALLATION Prepare pad and unit supports Check and tighten the bottom condensate drain connection plug Rig and place unit Convert unit to side duct connection arrangement Install field-fabricated ductwork at unit duct openings Install outdoor air hood MAXIMUM ALLOWABLE Install condensate line trap and piping DIFFERENCE IN.
Page 12 Fig. 10 — Roof Curb Details...
Page 13: Step 5 - Field Fabricate Ductwork
Step 5 — Field Fabricate Ductwork Cabinet return-air static pressure (a negative condition) shall WARNING not exceed 0.35 in. wg (87 Pa) with economizer or 0.45 in. wg (112 Pa) without economizer. PERSONAL INJURY HAZARD For vertical ducted applications, secure all ducts to roof curb Failure to follow this warning could cause personal injury.
Page 14: Positioning On Curb
DIMENSIONS MAX WEIGHT UNIT 548J07A 74.38 1889 37.25 41.38 1051 NOTES: 1. Dimensions in () are in millimeters. 2. Hook rigging shackles through holes in base rail, as shown in detail “A.” Holes in base rails are centered around the unit’s center of gravity. Use wooden top to prevent rigging straps from damaging unit.
Page 15: Step 8 - Install Outside Air Hood
SCREWS Hood Parts Plastic Tie Wrap Qty (2) DUCT COVERS SHEET METAL FACE UP Screws for Metal Tray Qty (2) BASEPAN Fig. 16 — Economizer and Two-Position Damper Hood Parts Location Carefully lift the hood assembly (with metal tray) through the filter access opening and assemble per the steps outlined in “Economizer Hood and Two-Position Hood”...
Page 16: Step 9 - Units With Hinged Panels Only
PANEL INDOOR COIL ACCESS PANEL LEFT HOOD SCREW SIDE 19 1/16” (483mm) Fig. 20 — Compressor Door Latch Location 33 3/8” (848mm) Step 10 — Install External Condensate Trap and Line HOOD DIVIDER The unit has one -in. condensate drain connection on the end Fig.
Page 17: Step 11 - Make Electrical Connections
Step 11 — Make Electrical Connections Units Without Non-Fused Disconnect Option WARNING (3 Phase Indoor Motor) Failure to follow this warning could result in personal inju- (1 Phase Indoor Motor ry or death. and 1 Phase Unit) Do not use gas piping as an electrical ground. Unit cabinet must have an uninterrupted, unbroken electri- cal ground to minimize the possibility of personal injury if Disconnect...
Page 18 Fig. 25 — 548J Control Wiring Diagram...
Page 19: Units With Factory-Installed Non-Fused Disconnect
Fig. 26 — Typical 548J 07 Power Wiring Diagram (208/230v-3 Ph-60 Hz Unit Shown) Make sure the NFD shipped from the factory is at OFF UNITS WITH FACTORY-INSTALLED NON-FUSED DISCONNECT position (the arrow on the black handle knob is at OFF). Insert the shaft with the cross pin on the top of the shaft in The factory-installed option non-fused disconnect (NFD) the horizontal position.
Page 20: Units Without Factory-Installed Non-Fused Disconnect
transformer. Refer to unit label diagram for additional informa- tion. Field power wires will be connected line-side pressure lugs on the power terminal block or at factory-installed option non-fused disconnect. NOTE: Check all factory and field electrical connections for tightness. CONVENIENCE OUTLETS WARNING ELECTRICAL OPERATION HAZARD...
Page 21: Factory-Option Thru-Base Connections
permit service tool cords to exit the cover. Check for full clos- ing and latching. Non-powered type This type requires the field installation of a general-purpose 125-v 15-A circuit powered from a source elsewhere in the building. Observe national and local codes when selecting wire size, fuse or breaker requirements and disconnect switch size and location.
Page 22: Units Without Thru-Base Connections
Example: Supply voltage is 230-3-60 AB = 224 v LOW VOLTAGE BC = 231 v CONDUIT AC = 226 v CONNECTOR MOTOR (224 + 231 + 226) Average Voltage Determine maximum deviation from average voltage. (AB) 227-224 = 3 v (BC) 231-227 = 4 v HIGH VOLTAGE (AC) 227-226 = 1 v...
Page 23: Unit Without Thru-Base Connection Kit
Locate the thermostat accessory on a solid wall in the condi- tioned space to sense average temperature in accordance with the thermostat installation instructions. If the thermostat con- tains a logic circuit requiring 24-v power, use a thermostat ca- ble or equivalent single leads of different colors with minimum of seven leads.
Page 24: Auxiliary (Electric) Heat Control
Fig. 38 — Defrost Control Board Location Table 6 — 548J Defrost Board I/O and Jumper Configurations POINT NAME TYPE OF I/O CONNECTION PIN NUMBER UNIT CONNECTION NOTE INPUTS G Fan DI, 24 vac P2-3 CTB-G Y1 Cool 1 DI, 24 vac P2-5 CTB-Y1 Y2 Cool 2...
Page 25: Electric Heaters
DIP switches SW1 and SW2 (see Fig. 39 and Table 7). The de- DISCONNECT EMT OR RIGID CONDUIT SINGLE CENTER MANUAL RESET fault run period is 30 minutes. MOUNTING (FIELD-SUPPLIED) POINT BOX POST LIMIT SWITCH LOCATION HEATER Shorting the jumpers for a period of 5 to 20 seconds bypasses the COVERS remaining continuous run period and places the unit in a Forced Defrost mode.
Page 26: Single Point Boxes Without Fuses
CONTROL BUSHING SINGLE POINT BOX MOUNTING SCREWS DRIP BOOT BRACKET MOUNTING SCREWS POWER WIRES FOAM BUSHING HEATER RELAYS HEATER MOUNTING Fig. 45 — W7220 Economizer Module SCREWS The W7220 economizer module can be used as a stand-alone Fig. 43 — Typical Single Point Installation economizer module wired directly to a commercial set-back SINGLE POINT BOXES WITHOUT FUSES space thermostat and sensors to provide outside air dry-bulb...
Page 27: Inputs
• Relay Digital Output Rating at 30 vac (maximum power NOTE: The four terminal blocks are removable. Slide out each from Class 2 input only) — 1.5A run: terminal block, wire it, and then slide it back into place. 3.5A inrush at 0.45PF (200,000 cycles) or 7.5A inrush at 0.45PF (100,000 cycles) •...
Page 28: Interface Overview
Table 9 — Economizer Module Table 10 — HH57AC081 Sensor Wiring Terminations (Right Hand Terminal Blocks) TERMINAL TYPE DESCRIPTION LABEL TYPE DESCRIPTION NUMBER LABEL Top Right Terminal Blocks S-BUS Communications AUX2 I 24 vac IN The first terminal is not used. S-BUS S-BUS (Enthalpy Control...
Page 29: Setup And Configuration
To use the keypad when working with menus: NOTE: When values are displayed, pressing and holding the ▲ or ▼ button causes the display to automatically increment or • Press the ▲ (Up arrow) button to move to the previous decrement.
Page 30 Table 12 — W7220 Menu Structure* PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † FIRST STAGE COOLING DEMAND (Y1–IN) ECON 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...
Page 31 Table 12 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † EXHAUST STAGE 2 RELAY OUTPUT Output of AUX1 O terminal Displays ON when damper position reaches programmed EXH2 OUT ON/OFF percentage set point.
Page 32 Table 12 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † EXHAUST FAN STAGE 1 SETPOINT Set point for OA damper position when exhaust fan 1 is powered 0 to 100%; by the economizer.
Page 33 Table 12 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † NONE Used for alarm for when the DA air temperature is too high. Sets 70°F to 180°F DA HI ALM 80°F (27°C) upper range of alarm;...
Page 34 Table 12 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † Check if outdoor temperature is below the LOW Temp Lockout on set point menu. Check if Mixed air temperature on STATUS FREEZE ALARM menu is below the Lo Set point on Advanced menu.
Page 35 Table 14 — Dry Bulb Operation without 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 (DCV) ECONOMIZE High 0-v/Off 0-v/Off MIN POS Closed High 24-v/On 0-v/Off MIN POS Closed High...
Page 36 Table 17 — Enthalpy Operation with 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 (DCV) ECONOMIZE High 0-v/Off 0-v/Off Closed VENTMIN High 24-v/On 0-v/Off Closed VENTMIN High 24-v/On 24-v/On...
Page 37 Table 19 — Dry Bulb 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...
Page 38: Enthalpy Settings
Table 21 — 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 39: Checkout
ECONOMIZING DUAL ENTHALPY AVAILABLE HIGH LIMIT NOT AVAILABLE SINGLE ENTHALPY P2 (T,RH) (T,RH) TEMPERATURE Fig. 50 — Single Enthalpy Curve Boundaries Table 23 — Single Enthalpy and Dual Enthalpy High Limit Curves POINT P1 POINT P2 ENTHALPY TEMP. DRY TEMP. ENTHALPY HUMIDITY HUMIDITY...
Page 40: Rtu Open Control System
You can also navigate to the Alarms menu at any time. Turn the assembly 90 degrees and then rotate end to end. Make sure that the elbow fitting is pointing down. See Clearing Alarms Fig. 52, Step 2. Once the alarm has been identified and the cause has been re- Screw the sensor and detector plate into its operating posi- moved (e.g.
Page 41: Step 12 - Adjust Factory-Installed Options
2 Position Damper Unit Without Economizer or Economizer 2 Position Damper Fig. 53 — EconoMi$er ® IV Wiring Step 12 — Adjust Factory-Installed Options • Head pressure control • Programmable setback thermostat SMOKE DETECTORS • Electro-mechanical thermostat and subbase Smoke detector(s) will be connected at the Controls Connec- •...
Page 42: Belt Tension Method
Adjust belt tension by loosing the motor mounting plate front BELT TENSION METHOD bolts and rear bolt (see Fig. 55) and slide the plate towards the Requires belt tension gage that measures tension in belt in units fan (to reduce tension) or away from the fan (to increase ten- of lbs-force.
Page 43: Start-Up Checklist
START-UP CHECKLIST (Remove and use for 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 judgment, follow safe practices, and adhere to the safety considerations/ information as outlined in preceding sections of this Installation Instruction document.
Page 44 GENERAL Economizer minimum vent and changeover settings to job requirements (if equipped) (Y/N) _____ Verify smoke detector unit shutdown by utilizing magnet test (Y/N) _____ IV. PERFECT HUMIDITY ™ SYSTEM START-UP STEPS 1. Check UCB (Unit Control Board) for jumper 1, 2, 3 (Jumper 1, 2, 3 must be cut and open) (Y/N) _____ 2.

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