INSTALLATION INSTRUCTIONS QC SERIES CHILLED WATER UNIT Model: QC501 MIS-1554 Bard Manufacturing Company Bryan, Ohio 43506 Since 1914...Moving ahead, just as planned. Manual No.
CONTENTS Getting Other Information and Publications For more information, contact these publishers: ..... 1 QC General Information QC Model Nomenclature ......................................... 2 Shipping Damage .................................................... 5 Unit Removal From Skid .......................................... 5 Handling Unit After Removal From Skid .................. 5 Removal of Wall Bracket from Shipping Location ... 6 General ........................................................
GETTING OTHER INFORMATION AND PUBLICATIONS These publications can help you install the air conditioner or heat pump. You can usually find these at your local library or purchase them directly from the publisher. Be sure to consult current edition of each standard.
QC SERIES WATER SOURCE GENERAL INFORMATION QC MODEL NOMENCLATURE QC 50 1 – A X Revision X X X X Filter Options X - 1 Inch Fiberglass (Standard) F - 2 Inch Fiberglass P - 2 Inch pleated KW 0Z - 0KW 05 - 5 KW 10 - 10KW 15 - 15KW (Note 1) Model Number QC - QTec™ Model Capacity 50 - 4 ton 10 Valve Options 4 - 2-way valve 5 - 3-way valve Internal Controls X - None Color V - Platinum w/Slate Front (vinyl) 4 - Gray Paint Volts & Phase A - 230/208-60-1 K - 115-60-1 X Climate Control X - None Venti
TABLE 2A COOLING PERFORMANCE CHART GPM EWT C FM BTUH Capacity (1000) BTUH Capacity (1000) Stage 1 Stage 1 and 2 Water Coil Pressure Drop Total Sensible Latent Total Sensible Latent PSIG Ft. Hd. 15.1 10.5 4.6 38.5 25.3 13.2 1.9 4.4 16.4 11.1 5.3 41.5 26.8 14.7 3.3 7.5 10 17.4 11.7 5.7 43.2 27.4 15.8 4.9 11.3 6 13.9 10.0 3.9 35.8 24.2 11.6 1.9 4.4 15.1 10.6 4.5 38.4 25.4 13.0 3.3 7.5 10 16.0 11.1 4.9 40.0 26.0 14.0 4.9 11.3 6 12.8 9.6 3.
Manual 2100-416 Page 4 FIGURE 1 UNIT DIMENSIONS
SHIPPING DAMAGE 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. UNIT REMOVAL FROM SKID WARNING This unit is heavy and requires more than one person to handle and remove from the skid.
FIGURE 3 PROPER HANDLING OF UNIT AFTER REMOVAL FROM SKID QTEC UNIT (RIGHT SIDE) STRAP APPLIANCE CART REMOVAL OF WALL BRACKET FROM SHIPPING LOCATION The wall brackets are attached to the back of the unit. Remove and retain the wall brackets for use when attaching the unit to the wall. In those installations where a wall sleeve is required these two wall brackets are to be discarded. A different style bracket is supplied with the sleeve assembly.
FIGURE 4 INSTALLATION OF UNIT THRU WALL WITH WALL SLEEVE MIS-1564 Manual 2100-416 Page 7
FIGURE 5 INSTALLATION WITH FREE BLOW PLENUM CEILING MIS-1558 FLOOR FIGURE 6 DUCTED APPLICATION 20 IN.
DUCT WORK Any heat pump is more critical of proper operating charge and an adequate duct system than a straight air conditioning unit. All duct work must be properly sized for the design air flow requirement of the equipment. Air Conditioning Contractors of America (ACCA) is an excellent guide to proper sizing. All duct work or portions thereof not in the conditioned space should be properly insulated in order to both conserve energy and prevent condensation or moisture damage.
CONDENSATE DRAIN See Figures 9A, 9B and 9C. The condensate drain hose is routed down from the evaporator drain pan on the right side of the unit into the compressor compartment. There are three locations that the drain can exit the cabinet. For a stand pipe type of drain, the drain hose can exit the rear of the cabinet. There is adequate hose length to reach the floor on the right hand side of the unit. NOTE: Whichever type of drain connection is used a “P” trap must be formed.
The rear drain can be used with wall thickness of up to 10 inches where a water trap can be installed between the unit and the interior wall. See Figure 8B. The trap cannot extend beyond the edge of the unit or it will interfere with the wall mounting bracket. The drain can be routed through the floor or through the wall. If the drain is routed through the wall, the drain line must be positioned such that it will not interfere with the sleeve flange or the grille. See Figure 9C on Page 10.
FIGURE 10 FRESH AIR DAMPER REMOVAL MOUNTING SCREW MIS-1627 Manual 2100-416 Page 12
QTEC ENERGY RECOVERY VENTILATOR OPTION Before starting the removal make sure that the power has been turned off. The hinged return air grille panel must be opened. The energy recovery ventilator (QERV) can be seen after the panel is opened. To gain access to the mist eliminator, the QERV must be removed. Refer to Figure 11 1. The front fill plate of the QERV must be removed. There is one screw on either side of the plate. Remove these screws and remove the plate. 2.
INSTALLATION INSTRUCTIONS MOUNTING THE UNIT When installing a QC unit near an interior wall on the left side, a minimum of 8 inches is required; 12 inches is preferred. When installing a QC unit near an interior wall on the right side, a minimum of 12 inches is required as additional space is required to connect the drain. 7. Position side trim pieces to the wall and attach with field supplied screws. There are two long and two short pieces supplied. The long pieces are to enclose the gap behind the unit.
FIGURE 13 UNIT MOUNTING WITHOUT VENTILATION WALL SLEEVE (REFER TO MOUNTING INSTRUCTIONS ON PAGE 13) SIDE TRIM (2 PIECES) SIDE TRIM (2 PIECES) WALL MOUNTING BRACKET MIS-1557 BOTTOM TRIM PIECE BOTTOM TRIM EXTENSION Manual 2100-416 Page 15
FIGURE 14 COMPONENT LOCATION SIDE FIELD WIRE ENTRANCE REMOTE THERMOSTAT TERMINAL BLOCK INDOOR BLOWER CONTROL BOX/ CIRCUIT BREAKER PANEL MIS-1736 WIRING – MAIN POWER Refer to the unit rating plate and/or Table 2 for wire sizing information and maximum fuse or “HACR Type” circuit breaker size. Each unit is marked with a “Minimum Circuit Ampacity”. This means that the field wiring used must be sized to carry that amount of current.
The unit rating plate lists a “Maximum Time Delay Relay Fuse” or “HACR Type” circuit breaker that is to be used with the equipment. The correct size must be used for proper circuit protection, and also to assure that there will be no nuisance tripping due to the momentary high starting current of the compressor motor. The Climate Control Option D is an electronic, programmable thermostat. The subbase of the thermostat is factory wired to the front panel of the unit.
LOW VOLTAGE CONNECTIONS “W2” terminal or pin 9 of P2 is second stage heating output. These units use a grounded 24 volt AC low voltage circuit. “O1” terminal of pin 5 of P2 is the ventilation input. This terminal energizes any factory installed ventilation option. The “R” terminal is the hot terminal and the “C” terminal is grounded. “G” terminal or pins 6 and 1 of P2 are the fan inputs. Both must be energized for proper fan operation.
FIGURE 16 REMOTE THERMOSTAT WIRING DIAGRAM “X” OPTION IF93-380 MIS-1734 Manual 2100-416 Page 19
FIGURE 17 REMOTE THERMOSTAT WIRING DIAGRAM “D” THERMOSTAT OPTION IF93-380 4102-028 Manual 2100-416 Page 20
START UP 2. The wall thermostat perform multiple functions. Be sure that all function switches are correctly set for the desired operating mode before trying to diagnose any reported service problems. OPTIONAL CFM These units are shipped from the factory set to operate at the optional CFM level shown in Table 4. This provides lower operating sound levels for non-ducted, free discharge applications. This CFM level will reduce the system capacity performance by approximately 2% at the same energy efficiency.
TROUBLESHOOTING ECM BLOWER MOTORS CAUTION Disconnect power from unit before removing or replacing connectors, or servicing motor. Wait at least 5 minutes after disconnection power before opening motor. SYM PTOM Motor rocks slightly w hen starting.
SYM PTOM Motor starts but runs erratically CAUSE / PROCEDURE % Varies up and down or intermittent % Check line voltage for variation or "sag" % Check low voltage connections (G, Y, W, R, C) at motor; unseated pins in motor harness connectors % Check "Bk" for erratic CFM command (in variable speed applications % Check out system controls - thermostat? % Perform Moisture Check % "Hunts" or puffs" at high CFM (speed) % Does removing panel or filter reduce "puffing"? – Reduce restriction – Reduce maximum a
FIGURE 18 INTERNAL 2-WAY VALVE PIPING Valve Location Water Valves Valve Detail "NC" side of valve "COM" side of valve "NO" side of valve MIS-1899 Manual 2100-416 Page 24
FIGURE 19 INTERNAL 3-WAY VALVE PIPING Valve Location Water Valves Valve Detail "NC" side of valve "COM" side of valve "NO" side of valve MIS-1900 Manual 2100-416 Page 25
