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INSTALLATION
INSTRUCTIONS
QTEC SERIES
PACKAGED
AIR CONDITIONER
QA241D
QA361D
QA481D
Bard Manufacturing Company
Bryan, Ohio 43506
Since 1914 . . . Moving ahead, just as planned.
Models:
QA301D
QA421D
QA601D
MIS-1554
Manual:
Supersedes:
File:
Date:
2100-438C
2100-438B
Vol II Tab 14
06-02-04
© Copyright 2004
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Table of Contents
Related Manuals for Bard QA241D
Summary of Contents for Bard QA241D
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Page 1: Air Conditioner
INSTALLATION INSTRUCTIONS Models: QA241D QA301D QA361D QA421D QA481D QA601D MIS-1554 Manual: 2100-438C Bard Manufacturing Company Supersedes: 2100-438B Bryan, Ohio 43506 File: Vol II Tab 14 Since 1914 . . . Moving ahead, just as planned. Date: 06-02-04 © Copyright 2004... -
Page 2: Table Of Contents
CONTENTS Getting Other Information and Publications tart Up For more information, contact these publishers: ..1 Description of Standard Equipment ....... 20 Optional CFM (QA361, QA421, QA481 General Information and QA601 Only) ............20 Model Nomenclature .......... 2 Important Installer Note ..........20 Shipping Damage ............ -
Page 3: Getting Other Information And Publications
GETTING OTHER INFORMATION AND PUBLICATIONS FOR MORE INFORMATION, CONTACT These publications can help you install the air conditioner or heat pump. You can usually find these at THESE PUBLISHERS: your local library or purchase them directly from the publisher. Be sure to consult current edition of each standard. -
Page 4: Qt Ec Model Nomenclature
Series General Information MODEL NOMENCLATURE MODEL NUMBER | FILTER OPTIONS COIL OPTIONS QA - QT Model X - 1 Inch Fiberglass 0Z - 0KW X - Standard 05 - 5KW (Standard) 1 - Coated Evap. Coil 06 - 6KW F - 2 Inch Fiberglass 2 - Coated Cond. -
Page 5: Table 1 Factory Built-In Electric Heat Table
Manual 2100-438 Page... -
Page 6: Table 2 Electrical Specifications
TABLE 2 ELECTRICAL SPECIFICATIONS & Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors. " Based on 75° C copper wire. All wiring must conform to the National Electrical Code and all local codes. These “Minimum Circuit Ampacity”... -
Page 7: Table 2A Electrical Specifications
TABLE 2A ELECTRICAL SPECIFICATIONS & Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors. " Based on 75° C copper wire. All wiring must conform to the National Electrical Code and all local codes. These “Minimum Circuit Ampacity”... -
Page 8: Figure 1 Unit Dimensions
Manual 2100-438 Page... -
Page 9: Shipping Damage
FIGURE 2 SHIPPING DAMAGE AIR SEAL UNDER QT UNIT Upon receipt of equipment, the carton should be checked for external signs of shipping damage. The skid must remain attached to the unit until the unit is ready for installation. If damage is found, the receiving party must contact the last carrier immediately, preferably in writing, requesting inspection by the carrier’s agent. -
Page 10: Handling Unit After Removal From Skid
HANDLING UNIT AFTER REMOVAL The wheels of the unit must be locked. If the wheels were allowed to roll, the unit could roll off the cart. The FROM SKID unit should always be carted from the left side. This is the side where the compressor is located. -
Page 11: Figure 5 Installation With Free Blow Plenum
FIGURE 5 INSTALLATION WITH FREE BLOW PLENUM CEILING 8 FT. - 6 IN. MINIMUM RECOMMENDED 8 FT. - 5 IN. CEILING HEIGHT MIS-1574 FLOOR FIGURE 6 DUCTED APPLICATION SUSPENDED CEILING FIXED CEILING DUCT 20 IN. MINIMUM DUCT FLANGE 12 IN. MINIMUM 2 IN. -
Page 12: Duct Work
DUCT WORK For hot water coil option a QPBHWxx-F for free blow or QPBHWxx-D for ducted airflow is used All duct work must be properly sized for the design air When used with a ducted supply, a QCX Cabinet flow requirement of the equipment. Air Conditioning Extension can be used to conceal the duct work above Contractors of America (ACCA) is an excellent guide to the unit to the ceiling. -
Page 13: Fresh Air Intake
FRESH AIR INTAKE The side drain requires a water trap for proper drainage. See Figure 9. The drain can be routed through the floor This unit is equipped with a fresh air damper assembly. or through the wall. If the drain is to be routed The damper blade is locked in the closed position when through an unconditioned space, it must be protected the unit is shipped from the Factory. -
Page 14: Service Light
SERVICE LIGHT FIGURE 11 REAR DRAIN (TOP VIEW) The unit is equipped with a service light which DRAIN LINE signals the user that service is required. The light is located in the upper control panel and is visible only when the hinged service/filter access door is open. -
Page 15: Installation Instructions
INSTALLATION INSTRUCTIONS MOUNTING THE UNIT alignment to the mounting brackets. This unit must be level from side to side. If adjustments When installing a QT unit near an interior wall on the are necessary, shim up under the rollers with left side, a minimum of 8 inches is required;... -
Page 16: Wiring - Main Power
The humidistat is included. See LOCATION INDOOR BLOWER Figure 17 for wiring diagram. Compatible for use with Bard CS2000 Controller and Energy Recovery Ventilator. DEHUMIDIFICATION CONTROL The Climate Control Option E is an electronic, (OPTIONAL) programmable thermostat. -
Page 17: Low Voltage Connections
LOW VOLTAGE CONNECTIONS LOW VOLTAGE CONNECTIONS These units use a grounded 24 volt AC low voltage FOR DDC CONTROL circuit. The “R” terminal is the hot terminal and the “C” Fan Only Energize G terminal is grounded. Cooling Mode Energize Y, G “G”... -
Page 18: Figure 15 Thermostat Plug Terminals
TABLE 4 WALL THERMOSTATS AND SUBBASE COMBINATIONS FIGURE 15 THERMOSTAT PLUG TERMINALS BLOWER MOTOR P2 AND P4 LOW VOLTAGE PLUG (VIEWED FROM PIN END) (VIEWED FROM PIN END) MIS-1285 Manual 2100-438 Page... -
Page 19: Figure 16 Thermostat Wiring Diagram "X" Option
FIGURE 16 REMOTE THERMOSTAT WIRING DIAGRAM “X” THERMOSTAT OPTION NOTE: On option X or G the CS2000 (or other field provided means to control ventilation) must be used if any of the motorized ventilation options are installed. Manual 2100-438 Page... -
Page 20: Figure 17 Thermostat Wiring Diagram "G" Option
FIGURE 17 UNIT MOUNTED THERMOSTAT WIRING DIAGRAM “G” THERMOSTAT OPTION NOTE: On option X or G the CS2000 (or other field provided means to control ventilation) must be used if any of the motorized ventilation options are installed. Manual 2100-438 Page... -
Page 21: Figure 18 Thermostat Wiring Diagram "E" Option
FIGURE 18 UNIT MOUNTED THERMOSTAT WIRING DIAGRAM “E” THERMOSTAT OPTION Manual 2100-438 Page... -
Page 22: Start Up
START UP DESCRIPTION OF STANDARD CAUTION EQUIPMENT High Pressure Switch Provides refrigerant circuit high pressure protection. Do not plug in or unplug blower motor Includes lockout circuit that is resettable from room connectors while the power is on. Failure to thermostat. -
Page 23: Compressor Control Module
All three phase scroll compressors used in the QT Alarm Relay Output series are wired identically internally. As a result, once Alarm terminal is output connection for applications the correct phasing is determined for a specific system where alarm relay is employed. This terminal is or installation, connecting properly phased power leads powered whenever compressor is locked out due to HPC to the same Fusite terminal should maintain proper... -
Page 24: Mist Eliminator Service
6. Some service requires the need to remove the unit It is recommended that the mist eliminator be inspected from the wall including replacement of the indoor annually and serviced as required. The mist eliminator coil and/or the outdoor coil. Also servicing the can be inspected from the outside of the building by outdoor fan motor or fan blade will require looking through the outdoor grille. - Page 25 3. Underneath the heat recovery cassette there is a The mist eliminator can be seen through the opening in power connector for the lower blower assembly. the back of the unit. The mist eliminator must be raised To disconnect this plug, the tabs on both sides of up and the bottom can be pulled toward the front of the the plug must be squeezed to release the plug.
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Page 26: Figure 19 Fresh Air Damper Removal
FIGURE 19 FRESH AIR DAMPER REMOVAL MOUNTING SCREW MIS-1627 Manual 2100-438 Page... -
Page 27: Figure 20 Qerv Removal
FIGURE 20 QERV REMOVAL POWER CONNECTORS MOUNTING SCREWS LOWER BLOWER ASSEMBLY POWER CONNECTOR FRONT FILL MIS-1039 Manual 2100-438 Page... -
Page 28: Sequence Of Operation
SEQUENCE OF OPERATION CRV / QERV OPERATION Cooling – Circuit R-Y makes the thermostat pull in the QERV is energized by applying 24 VAC to the “F” compressor contactor starting the compressor and terminal of the low voltage terminal strip on units with outdoor motor. -
Page 29: Figure 21 Air Conditioning Mode Circuit Diagram
FIGURE 21 AIR CONDITIONING MODE CIRCUIT DIAGRAM MIS-1200 Manual 2100-438 Page... - Page 30 FIGURE 22 DEHUMIDIFICATION MODE CIRCUIT DIAGRAM MIS-1199 Manual 2100-438 Page...
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Page 31: Troubleshooting
TROUBLESHOOTING TABLE 5 TROUBLESHOOTING r i a o r t c r i t i u i r i r o f i t c , t i i t c s t i r o t e z i a t l i l o n i t... -
Page 32: Figure 23 Fan Blade Setting
FAN BLADE SETTING DIMENSIONS REFRIGERANT CHARGE Any service work requiring removal or adjustment in The correct system R-22 charge is shown on the unit the fan and/or motor area will require that the rating plate. Optimum unit cooling performance will dimensions in Table 6 be checked and blade adjusted in occur with a refrigerant charge resulting in a Super Heat or out of the motor shaft accordingly. -
Page 33: Pressure Chart
TABLE 9 COOLING PRESSURE (ALL TEMPERATURES IN DEGREES F) Low side pressure ± 2 psig High side pressure ± 5 psig Tables are based upon rated CFM (airflow) across the evaporator coil. If there is any doubt as to correct operating charge being in the system, the charge should be removed, system evacuated and recharged to serial plate instructions.