Related Manuals for McQuay SWP 018
Summary of Contents for McQuay SWP 018
- Page 1 Installation and Maintenance IM-708 Group: Applied Systems Part Number: IM708 Date: February 2002 Self-contained Air Conditioning System Type SWP Vintage Sizes 18D thru 95D, 105E 368-93-E © 2001 McQuay International...
-
Page 2: Table Of Contents
Low Pressure Switches ....... . . 27 Copyright © 2001 McQuay International. All rights reserved throughout the world. -
Page 3: Introduction
Introduction General Description Table 1: Self-contained unit operation manual literature Models SWP018 through 105 are factory assembled, refrig- UNIT CONTROL OPERATION MANUAL erant charged and tested, water cooled packaged air condi- CONFIGURATION BULLETIN NUMBER tioning units designed for ducted applications. Variable Air Volume (VAV) OM711 Discharge Air Control (DAC) -
Page 4: Installation
Installation Note: Installation and maintenance are to be performed required. Foam rubber gasket is provided around the perime- only by qualified personnel who are familiar with ter of unit top. Carefully set plenum. Attach with mounting local codes and regulations, and experienced with hardware provided with the plenum. -
Page 5: Refrigerant Piping
Refrigerant Piping Pressure Relief Valves flare connection for applications where it is necessary to connect vent piping and run it outside the building. All units have individual condensers per refrigerant circuit and each condenser is provided with a spring loaded relief CAUTION valve. -
Page 6: Water Connections
Water Connections General mizer will typically elevate the water temperature by 5 to 10°F before entering the condenser, allowing suitable Due to the variety of piping practices, it is advisable to fol- condenser water temperatures whenever the tower sup- low the recommendations of local authorities. They can sup- ply temperature is 50°F or higher. - Page 7 Figure3. Condenser water pressure drop SWP018 - Figure5. Economizer water pressure drop, SPW018- SWP040 SPW105 80 100 Condenser Flow Rate (gpm) Condenser Flow Rate (gpm) Note: HP = total unit compressor horsepower. Note: Includes coil, control valves and interconnecting piping. Figure4.
-
Page 8: Condensate Drain Connection
Figure7. Hot water coil pressure drop, SWP018 - Condensate Drain Connection SWP040 The condensate drain connection is 1 1/8" O.D.S. copper and is located on the same end of the unit as the condenser water connections. The drain is internally trapped at the factory requiring no external trap. -
Page 9: Duct Connections
Duct Connections Supply Air Figure9. Discharge duct configurations For connection of supply ductwork directly to the unit, a duct collar must first be mounted at the fan outlet, avoiding the mounting screws located around the perimeter of the fan discharge opening (see Figure 8). Fan discharge opening sizes are indicated on the unit dimensional drawings. -
Page 10: Physical Data
55° 55° 55° Temperature (F) Minimum GPM Maximum GPM Standard fan TSP limit is 5.5 inch of water. Consult your local McQuay sales representative for applications beyond this range. Table 3: Compressor circuit charge *REFRIGERANT OIL CHARGE COMPRESSOR CHARGE PER... -
Page 11: Dimensional Data
Dimensional Data Figure 11. Left Side Front (CW) Discharge with 0ptional Figure 12. Left Side Back (CCW) Discharge with Multi-Directional Plenum 0ptional Multi-Directional Plenum 9.63" (18-95) 10.31 (105) (Optional) (Optional) Multi-Directional Multi-Directional Plenum Plenum (See Notes) (See Notes) K x L Return Air K x L Return Air 3.25”... - Page 12 Figure 13. Unit Front Plan Figure 16. Left Side Return Air Multi-Directional (Optional) Plenum (See Notes, Page 11) (Optional) Left Side Right Side Piping Connections Piping Connections (See Notes) (See Notes) (P) Hot Water Out K x L Return Air (P) Hot Water In Supply Fan Motor...
-
Page 13: Unit Weights
Unit Weights Table 6. Unit and Component Weight in lbs. Unit Size Unit Weights Basic Configuration 2226 2313 2318 2638 2643 3110 3279 3406 3734 4021 4246 4673 SWP basic unit Filters 4" 30% or 65% efficiency Evaporator Coil 6 Row, 12 fpi 4 Row, 12 fpi Water Economizer Coil 4 Row, 12 fpi... -
Page 14: Field Wiring
Field Wiring General Return Air and Outside Air Sensors Wiring must comply with all applicable codes and ordi- All units are provided with a return air sensor. The outside nances. Warranty is voided if wiring is not in accordance air sensor is optional and can be ordered with the unit. The with specifications. - Page 15 Table 9. SAF Motor Nameplate Amp Table 208/60/3 230/60/3 460/60/3 575/60/3 400/50/3 Horsepower TYPE High Efficiency Premium Efficiency High Efficiency 14.8 14.0 Premium Efficiency 15.7 13.6 High Efficiency 22.3 21.6 10.8 10.8 Premium Efficiency 22.3 20.0 10.0 10.0 High Efficiency 29.7 28.0 14.0...
-
Page 16: Supply Power Wiring
Supply Power Wiring Lug Sizes For Single Disconnect or Power Block Units require three-phase power supply. Table 10. Single Disconnect Allowable voltage tolerances: UNIT VOLTAGE SIZE (AMPS) 60 Hertz 018-028 208/230 018-028 400/460 Nameplate 208V: Min.187V, Max. 229V 018-028 035-040 208/230 Nameplate 230V: Min.207V, Max. -
Page 17: Control Center
Control Center All electrical controls are enclosed in a central control center If the optional disconnect switch is provided, the switch han- located at the front of the unit. The control center is divided dle is visible and accessible without removing any safety or into two separate compartments, high and low voltage. -
Page 18: Electrical Legend
Electrical Legend Designation Description Standard Location Designation Description Standard Location ACT1 ACTUATOR,VARIABLE INLET VANES SUPPLY FAN SEC- OUTSIDE AIR ENTHALPY EXTERNAL TION ACT2 ACTUATOR,BYPASS VALVE CONDENSER VALVE OUTSIDE AIR TEMP. SENSOR EXTERNAL ACT3 ACTUATOR,WATERSIDE ECONOMIZER WATERSIDE ECONO OL10 OVERLOAD RELAY--SUPPLY FAN MAIN CONTROL VALVE AFD10... -
Page 19: Typical Wiring Schematics
Typical Wiring Schematics Figure 20. Power Schematic IM708... - Page 20 Figure 21. Input Schematic, Discharge Air Control (DAC) IM708...
- Page 21 Figure 22. Input Schematic, Zone or Space Comfort Control (SCC) IM708...
- Page 22 Figure 23. Output Schematic, Actuator Control IM708...
- Page 23 Figure 24. Output Schematic, Auxiliary Fan Start/Stop Control IM708...
- Page 24 Figure 25. Output Schematic, Actuator Control IM708...
- Page 25 Figure 26. Output Schematic, Compressor Control (4 Compressors/4, 5 or 6 Stage) IM708...
- Page 26 Figure 27. Output Schematic, Compressor Control (6 Compressors / 6 Stage) IM708...
-
Page 27: Standard Controls
Standard Controls High Pressure Switches Proof of Airflow Switch A positive proof of airflow switch (PC7) is provided with all The high pressure switch (HP1-HP6) is a single pole pres- units. The switch is factory set to close at 0.2 inches of water sure activated device that opens on a pressure rise. -
Page 28: Unit Options
Unit Options Duct High Limit The sensing tube should be located in a nonturbulent flow area of the duct. Keep several duct widths away A duct high limit (DHL) pressure control is provided as stan- from take-off points, bends or neck downs. dard with all units having variable air volume control. -
Page 29: Building Pressurization Applications
CAUTION Condenser Water Flow Switch A pressure differential type flow switch (WF1) is available Fragile sensor fittings. May damage pressure to verify flow to the unit condensers before compressor oper- sensor. ation is allowed. The flow switch is factory installed in the unit next to the condenser piping connections. -
Page 30: Condenser Water, Head Pressure Control
Condenser Water, Head Pressure installs the sensor tubing from unit mounted sensor(s) to duct location(s). The static pressure setpoint is keypad adjustable Control through the MicroTech II DDC controller. An optional condenser head pressure control valve is avail- All variable air volume units include field adjustable duct able on units without water side economizer. -
Page 31: System Check, Test And Start
(supplied with each unit) must be 15. The following must be done only for units with 20 hp signed and returned to McQuay International. compressors. Making sure unit switch S7 is in the "OFF" position, throw the main power disconnect to... -
Page 32: Fan Start-Up
Set internal MicroTech II time clock or external time timer must be returned to "Normal" for proper unit clock if used. operation. Set cooling setpoint to a value which will assure a full Do not allow compressors to come on repeatedly in the call for cooling. -
Page 33: Refrigerant Charge
as low as 6°F to 8°F. Insufficient superheat will cause liquid Verify that superheat is still in the prescribed range. floodback to the compressor and possible liquid slugging. Following this method should prevent over charging of Excessive superheat will reduce system performance and the circuit. -
Page 34: Variable Air Volume (Vav) Start-Up
Variable air volume (VAV) start-up Step 2. From Figure 31, the deflection height (h) is always 1/64" per inch of span length (t). For example, a 32" Enter the duct static pressure setpoint value and parameters span length would require a deflection of 32/64" or through the keypad: 1/2". -
Page 35: Final Control Settings
Final control settings Figure 31. Belt Tension When all of the start-up procedures have been completed, set the individual control parameters for operation. Unit switch S7 to AUTO. Heating/Cooling control parameters set as required. Alarm limits set as required. Night setback parameters set as required. Duct static pressure, building static pressure, as required. -
Page 36: System Maintenance
System Maintenance Clean condenser and economizer tubes on a periodic basis. Condenser and economizer coils can be cleaned chemically or mechanically. Tubing should be kept clean WARNING to maintain system performance. Lubricate motor and fan shaft bearings. Installation and maintenance are to be per- Align or replace belts as needed. -
Page 37: Replacement Parts
Replacement Parts Description McQuay Part Number Zone temperature sensor with tenant override 111048101 Outside air temperature sensor 060004703 Airflow proving switch 060015801 Discharge air temperature sensor 060004702 Return air temperature sensor 060004703 Freeze stat 072502001 Filters Part Number Unit Size Filter Size 2"-35%... -
Page 38: Service And Warranty Procedure
Replacement Parts obligates the Company to pay any labor or service costs for When writing to McQuay for service or replacement parts, removing or replacing parts, or any shipping charges. Refrig- refer to the model number, serial number, and G.O. number erant fluids, oils, and expendable items such as filters are not of the unit as stamped on the serial plate attached to the unit. -
Page 39: Check, Test And Start Procedure Form
Check, Test and Start Procedure Form Compressorized Equipment Warranty Registration Form: This form must be filled out and returned to McQuay, Warranty Department, within 10 days in order 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 40 START-UP Does the unit start & perform per sequence of operation as stated in IM Bulletin? Does the fan rotate in the right direction? Condenser inlet water temperature Deg. F _____ Condenser outlet water temperature Deg. F. _____ Number of Compressors Operating Deg.
- Page 41 Are VAV boxes set to keep a minimum airflow of 40% of design? Do the Economizer, Water Regulating, and Hot Water valves rotate freely? Performed By: Title: Signature: Date of Start-up: RETURN COMPLETED FORM TO: McQuay International Warranty Department 13600 Industrial Park Boulevard Minneapolis, MN 55441 Comments: IM708...
- Page 44 13600 Industrial Park Boulevard, Minneapolis, MN 55441 USA (763) 553-5330...
Need help?
Do you have a question about the SWP 018 and is the answer not in the manual?
Questions and answers
How many watt cooling capacity of WCP SWP080?