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INSTALLATION
INSTRUCTIONS
© Copyright 2004
QTEC SERIES
PACKAGED HEAT PUMP
QH244D
QH363D
QH483D
Bard Manufacturing Company
Bryan, Ohio 43506
Since 1914 . . . Moving ahead, just as planned.
Models:
QH303D
QH423D
QH603D
MIS-1554
Manual:
Supersedes: 2100-435C
File:
Date:
2100-435D
Vol II Tab 14
02-10-06
Manual 2100-435D
Page
1 of 38
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Troubleshooting
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Summary of Contents for Bard QH303D
- Page 1 INSTRUCTIONS QH244D QH303D QH363D QH423D QH483D QH603D MIS-1554 Manual: 2100-435D Bard Manufacturing Company Supersedes: 2100-435C Bryan, Ohio 43506 File: Vol II Tab 14 Since 1914 . . . Moving ahead, just as planned. Date: 02-10-06 Manual 2100-435D © Copyright 2004...
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Page 2: Table Of Contents
CONTENTS Getting Other Information and Publications Start Up For more information, contact these publishers: ..3 Description of Standard Equipment ......23 Optional CFM ............23 General Information Important Installer Note ..........23 Model Nomenclature ........4 Phase Monitor ............23 Shipping Damage ............ -
Page 3: Getting Other Information And Publications
GETTING OTHER INFORMATION AND PUBLICATIONS FOR MORE INFORMATION, CONTACT THESE These publications can help you install the air conditioner or heat pump. You can usually find these at 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 3 D A MODEL NUMBER | FILTER OPTIONS COIL OPTIONS QH - QT Model 0Z - 0KW X - 1 Inch Fiberglass X - Standard (Standard) 05 - 5KW 06 - 6KW F - 2 Inch Fiberglass CAPACITY | P - 2 Inch Pleated 09 - 9KW... -
Page 5: Table 2 Electrical Specifications
TABLE 2 ELECTRICAL SPECIFICATIONS & 1 Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors. 2 Based on 75°C copper wire. All wiring must conform to the National Electrical Code and all local codes. 3 These “Minimum Circuit Ampacity”... -
Page 6: Table 2A Electrical Specifications
TABLE 2A ELECTRICAL SPECIFICATIONS (continued from Page 5) & – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –... -
Page 7: Figure 1 Unit Dimensions
Manual 2100-435D Page 7 of 38... -
Page 8: Shipping Damage
SHIPPING DAMAGE FIGURE 2 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 9: 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 10: 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 DUCT FIXED CEILING 20 IN. MINIMUM DUCT FLANGE 12 IN. MINIMUM 2 IN. -
Page 11: Duct Work
The QPB and QPBHW Plenum Box mounts on top of DUCT WORK the unit and has both vertically and horizontally Any heat pump is more critical of proper operating adjustable louvers on the front discharge grille. charge and an adequate duct system than a straight air When used with a ducted supply, a QCX Cabinet conditioning unit. -
Page 12: Fresh Air Intake
CONDENSATE DRAIN FRESH AIR INTAKE There are two drain connections on the unit. The rear This unit is equipped with a fresh air damper assembly. drain is the primary drain, and is located on the right The damper blade is locked in the closed position when lower rear panel of the unit. -
Page 13: 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 14: 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 15: Wiring - Main Power
The disconnect access door on this unit may be locked WIRING – MAIN POWER to prevent unauthorized access to the disconnect. Refer to the unit rating plate and/or Table 2 for wire See Start Up section for information on three phase sizing information and maximum fuse or “HACR Type”... -
Page 16: Low Voltage Connections
LOW VOLTAGE CONNECTIONS These units use a grounded 24 volt AC low voltage circuit. The “R” terminal is the hot terminal and the “C” terminal is grounded. n i l “G” terminal or pin 6 of P4 is the fan input. “Y”... -
Page 17: Figure 15 Thermostat Plug Terminals
TABLE 4 WALL THERMOSTATS AND SUBBASE COMBINATIONS c i t t i s t s i FIGURE 15 THERMOSTAT PLUG TERMINALS BLOWER MOTOR P2 AND P4 LOW VOLTAGE PLUG (VIEWED FROM PIN END) (VIEWED FROM PIN END) MIS-1285 Manual 2100-435D Page 17 of 38... -
Page 18: Figure 16 Thermostat Wiring Diagram "X" Option
Manual 2100-435D Page 18 of 38... -
Page 19: Figure 16-1 Details On Lvtb Connections
FIGURE 16-1 DETAILS OF LVTB CONNECTION DEHUM CIRCUIT 24 VAC COM DEHUM CIRCUIT NOTE: FIELD SUPPLIED DEHUMIDISTAT MUST BE DRY CONTACT CONNECTED TO TERMINALS 5 AND 4 ON LVTB COMPRESSOR REVERSING VALVE 2ND STAGE HEAT EMERGENCY HEAT 24VAC COM BLOWER VENTILATOR OR DAMPER NOTE: On options X and G the CS2000A (or other field provided means to control ventilation) must be used if any of the mechanical (motorized) -
Page 20: Figure 16A Thermostat Wiring Diagram "E" Option
Manual 2100-435D Page 20 of 38... -
Page 21: Figure 16B Thermostat Wiring Diagram "F" Option
Manual 2100-435D Page 21 of 38... -
Page 22: Figure 16C Thermostat Wiring Diagram "G" Option
Manual 2100-435D Page 22 of 38... -
Page 23: Start Up
START UP DESCRIPTION OF STANDARD PHASE MONITOR EQUIPMENT All units with three phase scroll compressors are equipped with a 3 phase line monitor to prevent Solid State Electronic Heat Pump Control compressor damage due to phase reversal. Provides efficient 30 minute defrost cycle. A thermistor sensor and speed up terminal for service along with a 10 The phase monitor in this unit is equipped with two minute defrost override are standard on the electronic... -
Page 24: Service Hints
SERVICE HINTS g. Remove screws that attach the duct work to the unit flanges. 1. Caution user to maintain clean air filters at all This unit is equipped with four rollers times. Also, not to needlessly close off supply air mounted to the base. -
Page 25: Vent Options
VENT OPTIONS R ENERGY RECOVERY VENTILATOR (Option) BAROMETRIC FRESH AIR DAMPER (Standard) Before starting, make sure that the power has been Before starting, make sure the power has been turned turned off. The return air grille panel must be removed. off. -
Page 26: Figure 17 Fresh Air Damper Removal
FIGURE 17 FRESH AIR DAMPER REMOVAL MOUNTING SCREW MIS-1627 Manual 2100-435D Page 26 of 38... -
Page 27: Figure 18 Qerv Removal
FIGURE 18 QERV REMOVAL POWER CONNECTORS MOUNTING SCREWS LOWER BLOWER ASSEMBLY POWER CONNECTOR FRONT FILL MIS-1039 Manual 2100-435D Page 27 of 38... -
Page 28: Sequence Of Operation
SEQUENCE OF OPERATION The bypass timer should be set to 200 seconds. this is to assure there is no nuisance tripping of the low-pressure Cooling – Circuit R-Y makes the thermostat pull in the control during startup in heating mode under cold compressor contactor starting the compressor and weather conditions. -
Page 29: Figure 19 Low Pressure Control Bypass Timer
When the humidity is above the setpoint of the the return air thermostat sensed a temperature below 65° humidistat, the compressor circuit and the 3 way valve during dehumidification, the fist stage electric heaters are brought on to raise the return air temperature above are energized and the evaporator air flow is reduced. -
Page 30: Figure 20 Dehumidification Mode Circuit
FIGURE 20 DEHUMIDIFICATION MODE CIRCUIT DIAGRAM MIS-1088 Manual 2100-435D Page 30 of 38... -
Page 31: Figure 21 Cooling Mode Circuit
FIGURE 21 COOLING MODE CIRCUIT DIAGRAM MIS-1089 Manual 2100-435D Page 31 of 38... -
Page 32: Figure 22 Heat Pump Control Board
FIGURE 22 There is an initial defrost jumper (sen HEAT PUMP CONTROL BOARD (HPC) jmp) on the control that can be used at any outdoor ambient during the heating cycle to simulate a 0° coil temperature. This can be used to check defrost operation of the unit without waiting for the outdoor ambient to fall into the defrost... -
Page 33: Troubleshooting
TROUBLESHOOTING TABLE 5 TROUBLESHOOTING t i u , t i t i n . l o a t l n i l . l o c t i c t i c t i c t i a t l . -
Page 34: Solid State Heat Pump Control Troubleshooting Procedure
SOLID STATE HEAT PUMP CONTROL CHECKING TEMPERATURE SENSOR TROUBLESHOOTING PROCEDURE 1. Disconnect temperature sensor from board and from outdoor coil. 1. Turn on AC power supply to indoor and outdoor units. 2. Use an ohmmeter and measure the resistance of the sensor. -
Page 35: 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 7 be checked and blade adjusted in occur with a refrigerant charge resulting in a Super Heat or out of the motor shaft accordingly. -
Page 36: Pressure Charts
TABLE 10 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. -
Page 37: Table 11 Heating Pressure
TABLE 11 HEATING PRESSURE (All Temperatures in Degrees F) Manual 2100-435D Page 37 of 38... - Page 38 Manual 2100-435D Page 38 of 38...
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