Bryant 549B Series Installation, Start-Up And Service Instructions Manual
  1. Manuals
  2. Brands
  3. Bryant Manuals
  4. Heat Pump
  5. 549B Series
  6. Installation, start-up and service instructions manual
Bryant 549B Series Installation, Start-Up And Service Instructions Manual

Bryant 549B Series Installation, Start-Up And Service Instructions Manual

Single package rooftop high-efficiency heat pump units, sizes 090,120 7 1/2and 10 tons
Hide thumbs Also See for 549B Series:
Table of Contents

Advertisement

Quick Links

Download this manual See also: User Manual, Installation, Start-up and Service Instructions Manual
IMPORTANT - READ BEFORE INSTALLING
1. Read and become familiar with these installation in-
structions before installing this unit (Fig. 1).
2. Be sure the installation conforms to all applicable local
and national codes.
3. These instructions contain important information for the
proper maintenance and repair of this equipment.
Retain these instructions for future use.
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
I. Locate the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
II. Unit Duct Connections . . . . . . . . . . . . . . . . . . . . . . 3
III. Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 3
IV. Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 6
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16,17
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-24
I. Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . 17
CARE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . 25
I. Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-27
I. Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
II. Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
III. Outdoor-Fan Adjustment . . . . . . . . . . . . . . . . . . . . 26
IV. Economizer Adjustment . . . . . . . . . . . . . . . . . . . . 26
V. Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . 26
VI. Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . 27
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-30
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1

SAFETY CONSIDERATIONS

Recognize safety information. This is the safety-alert symbol
(
). When you see this symbol on the unit and in instruc-
tions or manuals, be alert to the potential for personal
injury.
Understand the signal words - DANGER, WARNING, and
CAUTION. These words are used with the safety-alert sym-
bol. Danger identifies the most serious hazards which will
result in severe personal injury or death. Warning indicates
a situation that could result in personal injury. Caution is
used to identify unsafe practices which would result in minor
personal injury or product and property damage.
installation, start-up
and service instructions
SINGLE PACKAGE ROOFTOP
HIGH-EFFICIENCY HEAT PUMP UNITS
Page
Cancels: New
Fig. 1 - Typical Unit
WARNING: Before performing service or mainte-
nance operations on unit, turn off main power switch
to unit. Electrical shock could cause personal injury.
1. The power supply (volts, hertz, and phase) must corre-
spond to that specified on unit rating plate.
2. The electrical supply provided by the utility must be suf-
ficient to handle unit load.
3. Refer to Locate the Unit section on page 3 and Fig. 2 for
locations of electrical inlets, condensate drain, duct con-
nections, and required clearances before setting unit in
place.
4. This installation must conform with local building codes
and with NEC (National Electrical Code) or NFPA
(National Fire Protection Association) 54 TIA-54-1.
Refer to provincial and local plumbing or wastewater codes
and other applicable local codes.
5. Approved for outdoor installation on wood flooring or on
class A, B, or C roof covering materials.

INSTALLATION

Unit is shipped in the vertical airflow configuration (see
Fig. 1). To convert to horizontal discharge, remove side duct
opening covers. Using the same screws, install covers with
insulation-side down (facing outside) on the unit over verti-
cal duct openings. Seals around duct openings must
be tight.
All units can be connected into existing duct systems that are
properly sized and designed to handle an airflow of 300 to
500 cfm per each 12,000 Btuh of rated cooling capacity.
549B
Sizes 090,120
7
⁄
and 10 Tons
1
2
II 549B-90-1
7/15/95

Advertisement

Table of Contents
loading

Related Manuals for Bryant 549B Series

Summary of Contents for Bryant 549B Series

  • Page 1: Table Of Contents

    installation, start-up 549B and service instructions Sizes 090,120 ⁄ and 10 Tons SINGLE PACKAGE ROOFTOP HIGH-EFFICIENCY HEAT PUMP UNITS Cancels: New II 549B-90-1 7/15/95 IMPORTANT — READ BEFORE INSTALLING 1. Read and become familiar with these installation in- structions before installing this unit (Fig. 1). 2.
  • Page 2 STANDARD CORNER CORNER CORNER CORNER UNIT WEIGHT WEIGHT WEIGHT WEIGHT ‘‘H’’ ‘‘J’’ ‘‘K’’ UNIT WEIGHT 549B ft-in. ft-in. ft-in. 2 - 0 ⁄ 3 -5 ⁄ 1050 2 -9 ⁄ 1000 2 -10 ⁄ 4 -1 ⁄ 1253 3 -0 ⁄...

  • Page 3: Locate The Unit

    NOTE: When installing any accessory item, see the manu- facturer’s installation instructions packaged with the acces- sory. A qualified installer or agency must use only factory- authorized kits or accessories when modifying this unit. I. LOCATE THE UNIT A. Clearance Maintain clearance around and above unit to provide mini- mum distance from combustible materials, proper airflow, and service access.
  • Page 4 CONNECTOR UNIT SIZE ‘‘D’’ ALT ‘‘B’’ ‘‘C’’ POWER CONTROL ACCESSORY 549B DRAIN HOLE PACKAGE CRBTMPWR00A100 ⁄ ⁄ (Thru-the-Bottom) 090,120 2 -8 ⁄ [827] 1 -10 ⁄ [583] ⁄ [45] CRBTMPWR00A200 ⁄ ⁄ (Thru-the-Bottom) UNIT SIZE ROOF CURB ‘‘A’’ 549B ACCESSORY 1 -2 [356] CRRFCURB003A00 090,120...
  • Page 5 Table 1 — Specifications UNIT 549B NOMINAL CAPACITY (tons) ⁄ OPERATING WEIGHT (lb) Unit 1000 With Varislide™ Economizer 1044 With PARABLADE Economizer 1062 Roof Curb COMPRESSOR Scroll Quantity Oil (oz) (each compressor) REFRIGERANT TYPE R-22 Operating Charge (lb-oz) Circuit 1 9-11 Circuit 2 9-11...

  • Page 6: Field Connections

    the condensate drain and external trap can be completed after the unit is in place. All units must have an external trap for condensate drain- age. Install a trap at least 4-in. deep and protect against freeze- up. See Fig. 8. If drain line is installed downstream from the external trap, pitch the line away from the unit at 1 in.
  • Page 7 3. Use flexible transition between rigid ductwork and unit to prevent transmission of vibration. The transition may be screwed or bolted to duct flanges. Use suitable gas- kets to ensure weather- and airtight seal. 4. When horizontal return is used, install external field- supplied air filters in return-air ductwork where they are easily accessible for service.
  • Page 8 3. Use only copper or copper-clad conductor for connec- tions between field-supplied electrical disconnect switch and unit. The use of aluminum wire is not recom- mended. Maximum wire size is no. 2 AWG (American Wire Gage) on units with heat (up to 34 kW). The maxi- mum wire size is no.
  • Page 9 Route thermostat cable or equivalent single leads of colored 3. Feed wire through the raceway built into the corner post wire from subbase terminals to low-voltage connections on to the 24-v barrier located on the left side of the control unit (shown in Fig.
  • Page 10 Table 2B — Electrical Data (Units With Electrical Convenience Outlet) MINIMUM UNIT VOLTAGE NOMINAL COMPRESSOR OFM IFM ELECTRIC HEAT* POWER SUPPLY DISCONNECT UNIT RANGE VOLTAGE SIZE 549B (V-Ph-Hz) kW† MOCP — / — — / — 43.0/ 43.0 45/ 45** 46/ 46 247/247 7.8/10.4...
  • Page 11 Table 3 — Thermostats TYPE Manual Changeover (Standard) 2 Heat/2 Cool Auto. Changeover (Standard) 2 Heat/2 Cool Manual Changeover (Electronic Setback) 1 Heat/2 Cool Auto. Changeover (Electronic Setback) 2 Heat/2 Cool Defrost Board The defrost board timer cycle is set to 30 minutes. To change the cycle time, remove the wire from defrost board connected to the 30 minute quick-connect.
  • Page 12 4. On 120 units, install vertical discharge blockoff plate over duct openings. See Fig. 16. 5. Slide economizer into unit and secure with screws. See Fig. 17. NOTE: Be sure to engage rear economizer flange under tabs in vertical return-air opening. 6.
  • Page 13 ECONOMIZER MOTOR ECONOMIZER CONTROL BOARD WIRING HARNESS BAROMETRIC RELIEF DAMPER ECONOMIZER MOUNTING SCREWS Fig. 17 — Varislide™ Economizer Installed in Unit EXAMPLE: Given — Negative Pressure ......0.01 in. wg Outdoor Air .
  • Page 14 LEGEND OAT — Outdoor-Air Thermostat NOTE: See unit wiring diagram for more details. Fig. 23 — Wiring Connections for Outdoor-Air Thermostat Fig. 24 — Varislide Economizer Barometric Relief Damper Characteristics G. Optional PARABLADE Economizer The optional PARABLADE economizer hood assembly is pack- aged and shipped in the filter section.
  • Page 15 3. Assemble outdoor-air hood top and side plates as shown Therefore: in Fig. 15. Install seal strips on the hood top and sides. T 1 (cfm 1 ) + T 2 (cfm 3 – cfm 1 ) = T 3 Put aside screen retainer and retainer screw for later cfm 3 assembly.

  • Page 16: Pre-Start-Up

    PRE-START-UP WARNING: Failure to observe the following warn- ings could result in serious personal injury: 1. Follow recognized safety practices and wear pro- tective goggles when checking or servicing refrig- erant system. 2. Do not operate compressor or provide any electric power to unit unless compressor terminal cover is in place and secured.

  • Page 17: Compressor Rotation

    b. Make sure that correct air filters are in place. (See A. Checking Heating Control Operation Table 1.) Do not operate unit without return-air Start and check the unit for proper heating control operation filters. as follows: c. Make sure that condensate drain pan and trap are 1.

  • Page 18: Cooling Section Start-Up And Adjustments

    Compressor Overload — This overload interrupts power to III. COOLING SECTION START-UP AND ADJUSTMENTS the compressor when either the current or internal tempera- ture becomes excessive, and automatically resets when the CAUTION: Complete the required procedures given internal temperature drops to a safe level. This overload may in the Pre-Start-Up section on page 16 before starting require up to 60 minutes (or longer) to reset;...

  • Page 19: Indoor Airflow And Airflow Adjustments

    Units with PARABLADE Economizer 90 minutes), reversing valve solenoids (RVS1 and RVS2) are energized and the OFC is deenergized. This switches the po- When the outdoor air is above the enthalpy control setting, sition of the reversing valves and shuts off the outdoor fan. and the room thermostat calls for cooling, the compressor con- The electric heaters (if installed) will be energized.
  • Page 20 Table 8 — 549B090 Air Delivery — Vertical Discharge Units BELT DRIVE MOTOR External Static Pressure (in. wg) AIRFLOW (Cfm) 2250 0.52 0.74 0.95 1.19 1.43 1.68 2300 0.55 0.77 0.98 1.22 1.47 1.72 2400 0.61 0.84 1.06 1.30 1.55 1.81 2500 0.67...
  • Page 21 Table 9 — 549B120 Air Delivery — Vertical Discharge Units BELT DRIVE MOTOR External Static Pressure (in. wg) AIRFLOW (Cfm) 3000 0.46 0.85 1.01 1.10 1.30 1.50 3100 0.57 0.90 1.08 1.16 1.36 1.56 3200 0.62 0.97 1.16 1.23 1.43 1.63 3300 0.69...
  • Page 22 Table 10 — 549B090 Air Delivery — Horizontal Discharge Units BELT DRIVE MOTOR External Static Pressure (in. wg) AIRFLOW (Cfm) 2250 0.43 0.64 0.86 1.09 1.34 2300 0.45 0.66 0.89 1.12 1.37 2400 0.50 0.71 0.95 1.18 1.44 2500 0.54 0.76 1.01 1.25...
  • Page 23 Table 11 — 549B120 Air Delivery — Horizontal Discharge Units BELT DRIVE MOTOR External Static Pressure (in. wg) AIRFLOW (Cfm) 3000 0.35 0.74 0.88 1.05 1.24 3100 0.46 0.79 0.94 1.10 1.30 3200 0.57 0.85 1.01 1.16 1.36 3300 0.62 0.90 1.08 1.23...
  • Page 24 A. Belt Drive Motors To change fan speeds: 1. Shut off unit power supply. 2. Loosen belt by loosening fan motor mounting nuts. See Fig. 30 and 31. 3. Loosen movable pulley flange setscrew (see Fig. 32). 4. Screw movable flange toward fixed flange to increase speed and away from fixed flange to decrease speed.

  • Page 25: Care And Maintenance

    CARE AND MAINTENANCE SERVICE To ensure continuing high performance, and to minimize the CAUTION: When servicing unit, shut off all electri- possibility of premature equipment failure, periodic mainte- cal power to unit to avoid shock hazard or injury from nance must be performed on this equipment. This combina- rotating parts.

  • Page 26: Lubrication

    B. Fan-Motor Bearings Fan-motor bearings are of the permanently lubricated type. No further lubrication is required. No lubrication of outdoor- or indoor-fan motors is required. III. OUTDOOR-FAN ADJUSTMENT (Fig. 36) 1. Shut off unit power supply. 2. Remove outdoor-fan assembly (grille, motor, and fan) by removing screws and flipping assembly onto unit top cover.

  • Page 27: Replacement Parts

    the temperature sensing device on the suction line and insu- 2. Repair leak following accepted practices. late it so that outdoor ambient temperature does not affect NOTE: Install a filter drier whenever the system has been the reading. Indoor air cfm must be within the normal oper- opened for repair.

  • Page 28: Troubleshooting

    TROUBLESHOOTING Table 12 — Heating and Cooling Troubleshooting PROBLEM CAUSE REMEDY Compressor(s) and Power failure. Call power company. outdoor fan(s) Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. will not start. Defective thermostat, contactor, transformer, or control Replace component.
  • Page 29 Table 13 — Varislide™ Economizer Troubleshooting PROBLEM CAUSE REMEDY Damper does not Indoor fan is off. 1. Check to ensure that 24 vac is present at terminal C1 on the IFC or that open. 24 vac is present at the IFO terminal. Check whether 24 vac is present at PL6-1 (red wire) and/or PL6-3 (black wire).
  • Page 30 Table 14 — PARABLADE Economizer Troubleshooting PROBLEM CAUSE REMEDY Damper does not open. Indoor fan not on. Check wiring between G on connection board and indoor fan contactor. No power to economizer 1. Disconnect power at TR and TR1. Disconnect jumper across P and P1. motor.

  • Page 32: Start-Up Checklist

    START-UP CHECKLIST (Remove and Store in Job File) I. PRELIMINARY INFORMATION MODEL NO.: SERIAL NO.: DATE: TECHNICIAN: II. PRE-START-UP (insert checkmark in box as each item is completed) REMOVE ALL SHIPPING HOLDDOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS VERIFY THAT CONDENSATE CONNECTION IS INSTALLED AS SHOWN IN THE INSTALLATION INSTRUCTIONS CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS CHECK THAT INDOOR AIR FILTERS ARE CLEAN AND IN PLACE...

Table of Contents