Table of Contents
Advertisement
Advertisement
Table of Contents
Related Manuals for McQuay WHR Series
Summary of Contents for McQuay WHR Series
-
Page 3: General Description
THAN THE BASE. MOVING THE UNIT The McQuay SEASONPAK water chiller is mounted on heavy Figure 1. wooden skids to protect the unit from accidental damage and to permit easy handling and moving. It is recommended that all moving and handling be per- formed with the skids under the unit when possible and that the skids not be removed until the unit is in the final location. -
Page 4: Placing The Unit
optional acoustical enclosure, there will be extension brackets Do not attach slings to piping or equipment. Move unit in attached to the evaporator tube sheets. These brackets will the upright horizontal position at all times. Set unit down gently be used for hoisting the unit and should be removed when when lowering from the trucks or rollers. -
Page 6: Chilled Water Piping
Table 3. Spring Flex Isolators Figure 4. Spring Flex Mountings ADJUST MOUNTING SO UPPER HOUSING CLEAR3 LOWER HOUSING ‘/2” DIA POSITIONING PIN NEOPRENEPAD Figure 5. Single Neoprene-in-Shear Mounting POSITIONING PIN WATER PIPING GENERAL the water before it enters the unit or the pump is recom- Since regional piping practices vary considerably, local or- mended. -
Page 7: Flow Switch
CHILLED WATER SENSOR Table On units WHR-040D thru 240D. the chilled water sensor is factory installed in the leaving water connection on the evaporator. For detailed specifications regarding the chilled water sensor or any other sensors/transducers, refer to IM 493. Care should be taken not to damage the sensor cable or lead- wires when working around the unit. -
Page 8: Glycol Solutions
GLYCOL SOLUTIONS Test coolant with a clean accurate glycol solution hydrometer The system glycol capacity, glycol solution flow rate in gpm, (similar to that found in service stations) to determine freez- and pressure drop through the cooler may be calculated us- ing point. - Page 10 WATER PIPING CONDENSER modulation. These typical systems, depending on the specific GENERAL - For proper performance, the condenser water must enter the bottom connection of the condenser. Water application, must maintain a constant condensing pressure, regardless of temperature conditions and must assure cooled condensers may be piped for use with cooling towers, well water or heat recovery applications.
- Page 11 Single circuit heat recovery employs a standard water manufacturer for information on specific applications. cooled chiller equipped with heavier electrical components An auxiliary heat if the available con- source is necessary and a 380 psig high pressure limit switch. These modifica- denser heat is not sufficient to satisfy all of the heat load.
-
Page 12: Dual Condenser Heat Recovery - Arrangement H
DUAL CONDENSER HEAT RECOVERY - ARRANGEMENT H the cooling tower manufacturer for information on specific Dual condenser heat recovery chiller models have two water cooled condensers per refrigerant circuit. The upper con- applications. denser is the heat recovery condenser and is piped into the If the available condenser heat cannot satisfy all of the heat load, an auxiliary heat source must be provided. -
Page 13: Refrigerant Piping
REFRIGERANT PIPING UNIT WITH REMOTE CONDENSER-ARRANGEMENT A General - For remote condenser application such as an air discharge header. This is necessary to prevent any oil or con- cooled condenser, the chillers are shipped containing a densed liquid from draining to the top heads when the com- Refrigerant 22 holding charge. -
Page 14: Relief Valve Piping
UNIT WITH FACTORY MOUNTED CONDENSER(S) lem only arises during periods when cold water continues to Units with factory mounted condensers are provided with circulate through the condenser and the unit remains off due complete refrigerant piping and full operating refrigerant to satisfied cooling load. - Page 29 CONTROL CENTER All electrical controls are enclosed in a control center with justable controls are covered and can be adjusted without fear locking, hinged access door(s). A partition separates the ad- of contacting line voltage. Please refer to IM 493 for control section layout, all low justable safety controls from the starting and operating con- trots.
-
Page 42: Startup And Shutdown
Make sure all wiring and fuses are of the proper size. Also system. The cooler circuits should contain clean, non- make sure all interlock wiring is completed per McQuay corrosive water. diagrams. -
Page 43: Startup After Extended Shutdown
EXTENDED SHUTDOWN Move the Circuit 1 and Circuit 2 switches to the “Pump- 3. Close the manual liquid line shutoff valves. down and Stop” position. After the compressors have shut 4. Close the compressor suction and discharge service valves off, open the remote stop switch and the controller will stop and oil equalization valves on four compressor units. - Page 44 ELECTRICAL TERMINALS CAUTION: Electric shock hazard. Turn off all power before continuing with following service. All power electrical terminals should be retightened every six months, as they tend to loosen in service due to normal heating and cooling of the wire. OPERATING LIMITS ature for operating cycle is 90°F (during system change- over from heating to cooling cycle).
-
Page 45: System Service
SYSTEM SERVICE NOTE: Service on this equipment is to be performed by qualified refrigeration personnel. Causes for repeated tripping of safety controls must be investigated and corrected. CAUTION: Disconnect all power before doing any service inside the unit. FILTER-DRIERS To change the filter-drier, pump each refrigerant circuit down by closing the manual liquid line shutoff valve while a com- pressor is running. -
Page 46: Water Cooled Condenser
After re-assembling the evaporator, a small amount of gauge attached to one of the end plugs, observing if there refrigerant should be introduced by momentarily opening the is a loss of air pressure over a period of a minute or two. manual liquid line valve. -
Page 47: In-Warranty Return Material Procedure
The return of the part does not constitute an order for All parts shall be returned to the pre-designated factory, replacement. Therefore, a purchase order must be entered transportation charges prepaid. through your nearest McQuay representative. The order IM 508 I Page 47... -
Page 48: Troubleshooting Chart
TROUBLESHOOTING CHART Compressor Will 1. Main switch, circuit breakers open. 1. Close switch. Not Run 2. Fuse blown. 2. Check electrical circuits and motor winding for shorts or grounds. Investigate for posstble overloading. Replace fuse or reset breakers after fault is corrected. 3. -
Page 49: Product Warranty
Department, 302 Nichols Drive, Hutchins, TX 75141, up and the warranty shall expire twelve (12) months from that telephone (214) 2257351. For McQuay, Climate Control, Barry date. Blower and JennFan brandnames, contact SnyderGeneral No person (including any agent, salesman, dealer or Corporation, Warranty Claims Department, P.
Need help?
Do you have a question about the WHR Series and is the answer not in the manual?
Questions and answers