Bryant SINGLE PACKAGED HEAT PUMP UNITS 657A Installation, Start-Up, And Operating Instructions Manual
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Bryant SINGLE PACKAGED HEAT PUMP UNITS 657A Installation, Start-Up, And Operating Instructions Manual

Bryant SINGLE PACKAGED HEAT PUMP UNITS 657A Installation, Start-Up, And Operating Instructions Manual

Single packaged heat pump units
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See also: User's Information Manual
NOTE: Read the entire instruction manual before starting the
installation.
This symbol
indicates a change since the last issue.
SAFETY CONSIDERATIONS .....................................................1
Introduction ....................................................................................2
RECEIVING AND INSTALLATION ..........................................2
Check Equipment......................................................................2
IDENTIFY UNIT ................................................................2
INSPECT SHIPMENT ........................................................2
Provide Unit Support ................................................................3
ROOF CURB & SLAB MOUNT.......................................3
Provide Clearances....................................................................4
Select and Install Ductwork .....................................................5
Rig and Place Unit....................................................................6
INSTALLATION ................................................................8
Connect Condensate Drain .......................................................9
Install Duct Connections ..........................................................9
Install Electrical Connection ..................................................14
TIONS................................................................................14
PRE-START-UP ..........................................................................15
START-UP ...................................................................................17
CHECK FOR REFRIGERANT LEAKS..........................17
START UP AND MAKE ADJUSTMENTS....................18
CHARGE ...........................................................................18
MENTS ..............................................................................21
For 208/230v-PSC Blower Motor.....................................21
For 208/230v-ECM Blower Motor ...................................21
COOLING SEQUENCE OF OPERATION.....................22
HEATING SEQUENCE OF OPERATION .....................23
MAINTENANCE.........................................................................23
AIR FILTER......................................................................24
UNIT TOP REMOVAL ....................................................24
INDOOR BLOWER AND MOTOR ................................24
DRAIN PAN......................................................................27
OUTDOOR FAN...............................................................28
ELECTRICAL CONTROLS AND WIRING ..................28
REFRIGERANT CIRCUIT...............................................29
INDOOR AIRFLOW ........................................................29
LIQUID LINE STRAINER ..............................................29
Troubleshooting............................................................................31
Start-Up Checklist ........................................................................32
Installation, Start-Up
and Operating Instructions
657A
SINGLE PACKAGED
HEAT PUMP UNITS
Cancels: II 657A.24.4
NOTE TO INSTALLER - Before the installation, READ THESE
INSTRUCTIONS CAREFULLY AND COMPLETELY. Also,
make sure the User's Manual and Replacement Guide are left with
the unit after installation.
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified personnel should install, repair, or service
air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and 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. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations. Have fire extinguisher
available for all brazing operations. Consult a qualified installer or
service agency for information or assistance. The qualified in-
staller or agency must use only factory-authorized kits or acces-
sories when modifying this product.
Fig. 1-Unit 657A with Optional Base Rails
WARNING: Before performing service or maintenance
operations on system, turn off power to unit. Turn off
accessory heater power switch, if applicable. Electrical
shock can cause personal injury.
Recognize safety information. This is the safety-alert symbol
When you see this symbol 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
-1-
II 657A.24.5
7-03
C95002
.

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Summary of Contents for Bryant SINGLE PACKAGED HEAT PUMP UNITS 657A

  • Page 1: Table Of Contents

    Installation, Start-Up and Operating Instructions 657A SINGLE PACKAGED HEAT PUMP UNITS NOTE: Read the entire instruction manual before starting the installation. This symbol indicates a change since the last issue. TABLE OF CONTENTS SAFETY CONSIDERATIONS ...1 Introduction ...2 RECEIVING AND INSTALLATION ...2 Check Equipment...2...

  • Page 2: Introduction

    UNIT ELECTRICAL CHARACTERISTICS 657A024 208/230-1-60 657A030 208/230-1-60 Fig. 2— 657A024-030 Unit Dimensions (without base rails) severe personal injury or death. WARNING signifies a hazard which could result in personal injury or death. CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage.

  • Page 3: Provide Unit Support

    UNIT ELECTRICAL CHARACTERISTICS 657A024 208/230-1-60 657A030 208/230-1-60 Fig. 3— 657A024-030 Unit Dimensions (with base rails) Forward claim papers directly to transportation company. Manu- facturer is not responsible for any damage incurred in transit. Check all items against shipping list. Immediately notify the nearest distributor if any item is missing.

  • Page 4: Provide Clearances

    UNIT ELECTRICAL CHARACTERISTICS 657A036 208/230-1-60 657A042 208/230-1-60 657A048 208/230-1-60 657A060 208/230-1-60, Fig. 4— 657A036-060 Unit Dimensions (without base rails) outdoor coil-air inlet to prevent obstruction of airflow by grass or shrubs. Do not secure the unit to the slab except when required by local codes.

  • Page 5: Select And Install Ductwork

    UNIT ELECTRICAL CHARACTERISTICS 657A036 208/230-1-60 657A042 208/230-1-60 657A048 208/230-1-60 657A060 208/230-1-60, Fig. 5— 657A036-060 Unit Dimensions (with base rails) should be at least 4 in. above the highest expected water and runoff levels. Do not use unit if it has been under water. IV.

  • Page 6: Rig And Place Unit

    Flat Curb filter rack installed in the return-air side of the unit. Recommended sizes for filters are shown in Table 1. 2. Avoid abrupt duct size increases and reductions. Abrupt change in duct size adversely affects air performance. IMPORTANT: Use flexible connectors between ductwork and unit to prevent transmission of vibration.
  • Page 7 CHART A UNIT SIZE Weight 16.1 16.2 15.4 15.4 16.9 16.9 MAXIMUM ALLOWABLE to prevent damage when moving the unit. Unit must remain in an upright position during all rigging and moving operations. The unit must be level for proper condensate drainage; the ground-level pad or accessory roof curb must be level before setting the unit in place.

  • Page 8: Installation

    SIDE OF UNIT WITH ACCESS PANELS FOR CONTROL BOX AND INDOOR BLOWER HOUSING NOTES: 1. Extend 6-in. gravel apron around pad. 2. Provide a3-ft service clearance at front and rear sides of unit. WARNING: Secure screws and paint protectors solidly against unit base to hold lifting brackets in position.

  • Page 9: Connect Condensate Drain

    (1-1/2 in.) commerical standard. 2. We ldframe together. 3. Pa int with z inc-rich paint (rust-proof). Fig. 11—Optional Heat Pump Mounting Frame Fig. 12—Indoor Coil Access Panel away from the unit. If the installation requires draining the condensate water away from the unit, install a 2-in.
  • Page 10 Fig. 13—Removing Insulation and Vertical Duct Cover INDOOR BLOWER ACCESS PANEL (REMOVE SCREWS) Fig. 14—Indoor Blower Access Panel BLOWER SHELF FILLER BRACKET RACEWAY PLUG ASSEMBLIES Fig. 15—Converting Blower Assembly to Vertical Airflow —10— C95015 C950016 HORIZONTAL DUCT OPENING C950010...

  • Page 11: Configuring Units For Downflow

    1” (25mm) MIN. installed, use fire proof canvas (or similar heat resistant material) connector between ductwork and unit discharge connection. If flexible duct is used, insert a sheet metal sleeve inside duct. Heat resistant duct connector (or sheet metal sleeve) must extend 24-in. from the unit discharge connection flange into the ductwork.
  • Page 12 UNIT SIZE NOMINAL CAPACITY (ton) OPERATING WEIGHT (lb.) Without Base Rails WIth Optional Rails COMPRESSOR REFRIGERANT (R-22) Quantity (lb.) REFRIGERANT METERING DEVICE OUTDOOR COIL Rows...Fins/in. Face Area (sq. ft.) OUTDOOR FAN Nominal Cfm Diameter (in.) Motor Hp (Rpm) INDOOR COIL Rows...Fins/in.

  • Page 13: Configuring Units For Downflow

    14 11/16” (372) 13 3/4” (348) 3 3/4” (94) 22-GAGE SHEET METAL COVER (SEE ABOVE) SEAL ALL FOUR CORNERS WITH SILICONE SEALER TABLE 2—MINIMUM AIRFLOW FOR SAFE ELECTRIC HEATER securing the cover to the unit base and slide out the cover. Discard the cover.

  • Page 14: Install Electrical Connection

    WARNING: Before performing service or maintenance operations on the system, turn off main power to unit and install lockout tag or electrical shock could result. 1. Open all electrical disconnects and install lockout tag before starting any service work. 2. Remove indoor coil access panel (See Fig. 12). 3.

  • Page 15: Special Procedures For 208-V Operation

    HIGH VOLTAGE POWER ENTRY (KNOCKOUT) 7/8 DIA. CONTROL POWER ENTRY* *Knockout on rectangular-duct panel units; entry hole on round-duct panel units. NOTE: For rectangular duct knockout sizes, see Fig. 2-9. 3. ROUTING CONTROL POWER WIRES - STD NON- ECM UNITS (24 v) -Form a drip-loop with the thermostat leads before routing them into the unit.
  • Page 16 VOLTAGE COMPRESSOR OFM IFM RANGE UNIT 657A SIZE V-PH (–SERIES, (60 HZ) Min Max USED) 024–311 208/230-1 187 11.2 56.0 024–321 208/230-1 187 12.1 54.0 208/230-1 187 15.0 73.0 208/230-1 187 16.0 88.0 208/230-1 187 20.0 104.0 048–301 208/230-1 187 26.4 129.0 048–311 208/230-1 187...

  • Page 17: Start-Up

    LEGEND — Full Load Amps — Locked Rotor Amps — Minimum Circuit Amps MOCP — Maximum Overcurrent Protection — Rated Load Amps CKT BKR — Circuit Breaker NOTES: 1. In compliance with NEC (National Electrical Code) requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be Power Supply fuse .

  • Page 18: Start Up And Make Adjustments

    LEGEND NEC – National Electrical Code 1/2 IN. MAX FR OM FAN DECK MOTOR Fig. 25—Fan Blade Clearance B. START UP AND MAKE ADJUSTMENTS CAUTION: Complete the required procedures given in the Pre-Start- Up section before starting the unit. Do not jumper any safety devices when operating the unit.
  • Page 19 C95037 Fig. 26—Wiring Diagram–024 to 042 (208/230-60-1) —19—...
  • Page 20 C95038 Fig. 27—Wiring Diagram–048 to 060 (208/230-60-1 with ECM Indoor) —20—...

  • Page 21: Indoor Airflow And Airflow Adjustments

    The preset factory default selection is the highest airflow. 2. AC/HP SIZE (BLU) - The preset factory default selection for AC/HP SIZE (air conditioner/heat pump) is set to 400 cfm/ton. The selection pins are configured for 350 cfm/ton and 400 cfm/ton.

  • Page 22: Cooling Sequence Of Operation

    TERMINAL Available Airflow (CFM) GR Y Fig. 29—Easy Select Interface Board for Units 048-060 with ECM Blower Motor MODE LO-Adjust HI-Adjust 5. AC/HP TIME DELAY (GRY) - Four motor operation delay options are provided to customize system operation. See listing below: Unit Controls—...

  • Page 23: Heating Sequence Of Operation

    J. HEATING SEQUENCE OF OPERATION PSC BLOWER MOTOR UNITS (024–042) Heat Pump Heating - On a call for heat, thermostat makes circuits R-Y and R-G. When compressor time delay (5 +/- 2 minutes) is completed, a circuit is made to C, starting COMP and OFM.

  • Page 24: Air Filter

    TABLE 8—DRY COIL AIR DELIVERY (DEDUCT 10 PERCENT FOR 208V)* Motor Unit Speed Watts Watts 024 & 030 1025 Watts — High — Watts 1375 Watts 1520 Watts — High — Watts 1400 Watts 1600 Watts — High — * Air delivery values are based on operating voltage of 230-v dry coil, without filter or electric heater. Deduct wet coil, filter and electric heater pressure drops to obtain static pressure available for ducting.
  • Page 25 UNIT SIZE TABLE 11—ACCESSORY ELECTRIC HEATER PRESSURE DROP (IN. WG) HEATER 5–20 0.030 0.033 FILTER UNIT SIZE SIZE 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 (IN.) 024–036 24 x 24 x 1 —...
  • Page 26 TABLE 13B—SUPERHEAT CHARGING TABLE, UNIT 024–321 TEMP (F) AIR ENT COND 38.0 37.3 33.3 32.3 24.6 25.6 16.4 17.6 — — — — — — — — — — — — — — Ewb-Entering Wet Bulb SPH-Superheat at Compressor (F) –...

  • Page 27: Outdoor Coil, Indoor Coil, And Condensate Drain Pan

    TABLE 13E—SUPERHEAT CHARGING TABLE, UNIT 042 TEMP (F) AIR ENT COND 13.5 13.5 11.4 11.4 — — — — Ewb-Entering Wet Bulb SPH-Superheat at Compressor (F) – -Do not attempt to charge system under these conditions as refrigerant slugging may occur. TABLE 13F—SUPERHEAT CHARGING TABLE, UNIT 048–301 TEMP (F) AIR ENT...

  • Page 28: Outdoor Fan

    TABLE 13H—SUPERHEAT CHARGING TABLE, UNIT 060 TEMP (F) AIR ENT COND 21.0 21.0 16.5 16.5 12.0 12.0 10.5 10.5 — — — — — — — — — — Ewb-Entering Wet Bulb SPH-Superheat at Compressor (F) – -Do not attempt to charge system under these conditions as refrigerant slugging may occur. SUPERHEAT TEMP (F) 61.5...

  • Page 29: Refrigerant Circuit

    2. The refrigerant then feeds the indoor coil through the Acutrol metering device on each circuit. Fig. 31—Typical Heat Pump Operation-Cooling Mode G. REFRIGERANT CIRCUIT Inspect all refrigerant tubing connections and the unit base for oil accumulations annually. Detecting oil generally indicates a refrig- erant leak.
  • Page 30 2. The refrigerant then feeds the outdoor coil through the Acutrol metering device on each circuit. Fig. 32—Typical Heat Pump Operation-Heating Mode INDOOR COIL STRAINER HEATING CYCLE 3.
  • Page 31 SYMPTOM Compressor and outdoor fan will not start Compressor will not start but condenser fan runs Compressor cycles (other than normally satisfying thermostat) Compressor operates continuously Excessive head pressure TABLE 14—TROUBLESHOOTING CHART (CONT’D) SYMPTOM Low refrigerant charge Head pressure too low Restriction in liquid tube (Heat) Outdoor coil frosted Excessive suction pressure...

  • Page 32: Start-Up Checklist

    ____ Verify Refrigerant charge using charging tables * Measured at suction inlet to compressor † Measured at liquid line leaving outdoor coil © 2003 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 START-UP CHECKLIST (REMOVE AND STORE IN JOB FILE) —32—...

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