Related Manuals for McQuay SWP Series
Summary of Contents for McQuay SWP Series
- Page 1 Installation and Maintenance IM 937 Self-Contained Air Conditioning System Group: Applied Systems Part Number: IM 937 Date: October 2008 SWP Vintage Sizes 018 through 105 MicroTech III ® Unit Controller 368-93-E...
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Page 2: Table Of Contents
Contents Introduction .............. 3 Duct Static Pressure Sensor ......33 General Description ..........3 Adjustable Frequency Drive ......34 Inspection ............3 Hot Gas Bypass ..........34 Installation ..............4 Freezestat ............34 Handling ............. 4 Condenser Water Flow Switch......35 Vibration Isolators .......... -
Page 3: Introduction
Introduction and requirements, and service procedures, refer to IM 919, McQuay Self-Contained Air Conditioning units, models SWP “MicroTech III Unit Controls.” For a description of operation 018 through 105 are factory assembled, refrigerant charged... -
Page 4: Installation
24" Back Back Evaporator coil Evaporator Coil Condenser Condenser Left Left cleanout Cleanout side Side 24" 24" 36" 36" Motor Motor Compressors Compressors 36" 36" Right Right side Side Electrical panel Electrical Panel Front Front 42" 42" McQuay IM 937... -
Page 5: Removing Shipping Restraints
A minimum head pressure of 180 psi (95°F condensing temperature) is recommended. Condenser tube velocities must not exceed 10 feet per second. Flow and velocity will be satisfactory if water volumes do not exceed those shown in Table 2 on page 9. McQuay IM 937... - Page 6 Condenser Flow Rate (gpm) Note: 1. Includes coil, control valves and interconnecting piping. 2. Add this P to condenser P to obtain unit P for pump selection Condenser Flow Rate (gpm) HP = total unit compressor horsepower McQuay IM 937...
- Page 7 1/8" per foot. Keep drain pans and the drain trap clean by periodic cleaning. A cleanout is provided as standard in the trap to aid in cleaning. Water Flow Rate (gpm) McQuay IM 937...
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Page 8: Duct Connections
See Figure 11. Fan discharge opening sizes are indicated on the unit dimensional drawings. McQuay recommends a canvas type connecting collar. Install ductwork as shown in Figure 12. Duct take-offs that are installed opposite to the direction of fan rotation result in an associated system effect loss and reduced fan performance. -
Page 9: Physical Data
55° Minimum GPM Maximum GPM a. Standard fan TSP limit is 5.5 inches of water. Consult your local McQuay sales representative for applications beyond this range. Table 4: Tandem Compressor Circuit Charge, R-22 Table 3: Single Compressor Circuit Charge, R-407C... -
Page 10: Dimensional Data
For additional information, see submittal drawings.) For additional information, see submittal drawings.) K x L return air K x L return air 3.25" 3.25” Outlet Outlet Note: *For F vintage units, subtract 1.88. McQuay IM 937... - Page 11 018 to 028 23, 29, 35, 41 035 to 040 23, 29, 35, 41 045 to 065 29, 35, 41 Length 29, 35, 41 Front/back elevation Left/right elevation 29, 35, 41 095 to 105 29, 35, 41 Height Height McQuay IM 937...
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Page 12: Unit Weights
— a. Base weight includes supply fan without motor. b. Water economizer weight includes valves and piping. c. The values in this table do not include water weight. d. Hot water coil weight includes valve and piping. McQuay IM 937... - Page 13 1346 a. Base weight includes supply fan without motor. b. Water economizer weight includes valves and piping. c. The values in this table do not include water weight. d. Hot water coil weight includes valve and piping. McQuay IM 937...
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Page 14: Electrical Data
Wiring must comply with all applicable codes and ordinances. access panel, to the right of the control panel of the unit for McQuay’s product warranty does not cover equipment failures shipment. Field install it in the return air stream for proper unit caused or contributed to by wiring not in accordance with operation. - Page 15 62.0 49.2 Premium efficiency 137.0 120.0 60.0 60.0 47.5 High efficiency 154.0 144.0 72.0 72.0 57.4 Premium efficiency 160.0 140.0 70.0 70.0 56.0 a. 460/60/3 motors are used. Derate nameplate horsepower to 0.83 to obtain actual horsepower. McQuay IM 937...
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Page 16: Control Center
• Optional L communication module ORKS Located on the face of the unit is the interactive MicroTech III keypad/display, unit switch, system indicator light and power indicator. IM 919 has additional layouts of the control center. Note: McQuay IM 937... - Page 17 Electrical Data Figure 22: Typical 460 Volt, 6-Compressor Control Center Layout, High and Low Voltage Compartments McQuay IM 937...
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Page 18: Electrical Legend
MMP9–10 Manual motor protector, supply Main control box MP1–6 Motor protector, compr.#1–6 On compressors Outside air temperature sensor Shipped loose PB1, 2 Power block, power distribution Main control box PB10 Power block, supply fan Main control box McQuay IM 937... - Page 19 Plug connector Terminal block, internal Main control box 200/ H200 Terminal block, field, Class 2 Main control box Wire/harness number Terminal blocks, factory Main control box Terminal block, field, 115 V (ac) Main control box Wire nut/ID McQuay IM 937...
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Page 20: Typical Wiring Schematics
Electrical Data Typical Wiring Schematics Figure 24: Main Power McQuay IM 937... - Page 21 Electrical Data Figure 24: Main Power (continued) McQuay IM 937...
- Page 22 Electrical Data Figure 25: VFD Control McQuay IM 937...
- Page 23 Electrical Data Figure 25: VFD Control (continued) McQuay IM 937...
- Page 24 Electrical Data Figure 26: Main Control Inputs McQuay IM 937...
- Page 25 Electrical Data Figure 26: Main Control Inputs (continued) McQuay IM 937...
- Page 26 Electrical Data Figure 27: Compressor Control McQuay IM 937...
- Page 27 Electrical Data Figure 27: Compressor Control (continued) McQuay IM 937...
- Page 28 Electrical Data Figure 28: Compressor Power McQuay IM 937...
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Page 29: Control Panel Components
OFF and ON positions. To reset a tripped circuit breaker: Press the handle or rotate the lever to the OFF position. Press the handle or rotate the lever the opposite direction to the ON position. McQuay IM 937... - Page 30 Delay). The output relay reactivates after power line conditions return to an acceptable level for a specified amount of time (Restart Delay). The trip and restart delays prevent nuisance tripping due to rapidly fluctuating power line conditions. McQuay IM 937...
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Page 31: High Pressure Switches
• Dual circuits—6, 7, 8, 9, 10 hp Figure 32). • Independent circuits—6, 10 hp • Standard 1 to 30 second trip delay (“4” in Figure 32) (except loss of phase, which trips at 1 second non-adjustable). McQuay IM 937... -
Page 32: Unit Options
The DHL is located in the fan section on the the adjustment screw counterclockwise to increase differential motor side. pressure setting. When the filter pressure differential exceeds the switch setpoint, MicroTech III controller displays a McQuay IM 937... -
Page 33: Phase Fail/Under Voltage Protection
Locate the sensing tube in a nonturbulent flow area of the Tubing extends duct. Keep several duct widths away from take-off points, thru approx. 1/8" bends, or neck downs. McQuay IM 937... -
Page 34: Adjustable Frequency Drive
45°F. To change the set point, turn the adjustment screw until the pointer is opposite the desired cutout point. The adjustment screw is accessible at the bottom of the control or at the top when the cover is removed. McQuay IM 937... -
Page 35: Condenser Water Flow Switch
When the the actuator on the economizer valve closed and drive the entering water temperature is no longer suitable, the bypass valve closed when valves are independently controlled. economizer control valve closes and the unit is on 100% McQuay IM 937... -
Page 36: Microtech Iii Keypad Navigation
These include such Continue W/O Password things are control mode, occupancy mode and heating and Version Information cooling setpoints. Extended Menus include more advanced items for “tuning” unit operation such as PI loop parameters McQuay IM 937... -
Page 37: Navigation Mode
(down) on the page. When the wheel is Menu - higher level password required. 4) Advanced Menu - turned counter-clockwise the cursor moves to the previous line requires the highest level password. McQuay IM 937... - Page 38 MicroTech III Keypad Navigation Figure 39: Keypad/Display Menu Structure McQuay IM 937...
- Page 39 MicroTech III Keypad Navigation Figure 40: Keypad/Display Menu Structure (continued) McQuay IM 937...
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Page 40: System Check, Test, And Start
(supplied with each unit) must be Check the unit power supply wiring for adequate ampacity signed and returned to McQuay International. and a minimum insulation rating of 75°C. Before opening service panels, always lock out and tag... -
Page 41: Start-Up
The economizer modulates to maintain the cooling discharge set point whenever the entering water temperature is below the mixed air temperature to the unit by an adjustable differential (0–10 degrees) and the unit is calling for cooling. McQuay IM 937... - Page 42 If the system is running near R-22. Units purchased for R-407C operation must be charged design conditions, subcooling should be near the upper end only with R-407C. of the range. Verify that superheat is still in the prescribed range. McQuay IM 937...
- Page 43 RPM Changes All units are provided with fixed pitch sheaves selected for the specified operating conditions. If a new fan rpm selection is required, field install a new sheave selection. Adjust the belt tension as described below. McQuay IM 937...
- Page 44 After the unit is checked, tested, and started and the final control parameters are set, record the final settings and keep them on file. Update this file whenever changes are made to the control parameters. This facilitates any required analysis and troubleshooting of the system operation. McQuay IM 937...
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Page 45: System Maintenance
Specific greasing instructions are located on a tag Note: A partially full sightglass is not uncommon at part attached to the motor. If special lubrication instructions Note: load conditions. Check for proper superheat. are on the motor, they supersede all other instructions. McQuay IM 937... - Page 46 Do not hammer on any component of the bearing. Fasten unit in place - Install housing mounting bolts, check and align bearing and tighten mounting bolts to recommended fastener torques. Exercising extreme caution and safety, rotate shaft slowly to center bearing. McQuay IM 937...
- Page 47 Bore Size (in) In lbs. Size 27 (AF)/40 & 49 2-3/16 T-30 (SWSI) 30 & 33 (AF)/44 2-7/16 T-45 (SWSI) 36 (AF) 2-11/16 T-45 40 (AF) 2-15/16 T-45 AF = DWDI AF, SWSI = AF Plenum Fan Note: McQuay IM 937...
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Page 48: Replacement Parts
Replacement Parts Replacement Parts Description McQuay part number Zone temperature sensor with tenant override 111048101 Outside air temperature sensor (OAT) 060004703 Airflow proving switch (PC7) 060015801 Discharge air temperature sensor (DAT) 1706144-01 Return air temperature sensor (RAT) 1706142-01 Freeze stat (FS1) -
Page 49: Service And Warranty Procedure
Contact the McQuay Parts Department for compressor availability. • Single Copeland Scroll or Bristol reciprocating compressors, one per refrigerant circuit Send a completed parts order form to the McQuay Parts Department. • Tandem compressors, two compressors specifically manufactured by Copeland into a single assembly The Parts Department processes the order and the compressors ship via ground transportation. -
Page 50: Warranty Return Material Procedure
In-Warranty Return Material Procedure Material other than compressors may not be returned except by Defective material may not be returned without permission of permission of authorized factory service personnel of McQuay authorized factory service personnel of McQuay International International at Minneapolis, Minnesota. -
Page 51: Check, Test, And Start Procedure Form
Check, Test, and Start Procedure Form Compressorized Equipment Warranty Registration Form: Complete this form and return to McQuay, Warranty Department, within 10 days to comply with the terms of McQuay Warranty. Check, Test, and Start Procedure for SWP/SWT (Self-Contained Air Conditioning Systems) Job name: ________________________________________________ McQuay G.O. - Page 52 Fan motor current per phase ________amps __________amps __________ amps FLA: ___________ amps Variable frequency drive: ________ % speed/__________ Hertz Fan speed ___________rpm at above frequency Unit voltage across each phase _________ volts _________ volts _________ volts Unit current per phase __________ amps_________ amps _________ amps McQuay IM 937...
- Page 53 Performed by: ______________________________________________ Title:_________________________________ Signature: _________________________________________________ Date of start-up: _______________________ Return completed form to: McQuay International Warranty Department 13600 Industrial Park Boulevard Minneapolis, MN 55441 Comments: ______________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ McQuay IM 937...
- Page 54 McQuay Training and Development Now that you have made an investment in modern, efficient McQuay equipment, its care should be a high priority. For training information on all McQuay HVAC products, please visit us at www.mcquay.com and click on training, or call 540-248-9646 and ask for the Training Department.