Installation & Maintenance Data
IM 439-15
Group: WSHP
Part Number: 106581103
Date: June 2006
Large Vertical Water Source Heat Pumps
6 thru 25 Tons
Models LDD, LDE, LDL, LDS, LME, LMH, LML, LMS
©2006 McQuay International
®
Page 1: ...tallation Maintenance Data IM 439 15 Group WSHP Part Number 106581103 Date June 2006 Large Vertical Water Source Heat Pumps 6 thru 25 Tons Models LDD LDE LDL LDS LME LMH LML LMS 2006 McQuay Internatio...
Page 2: ...xt Range LMH High Static Large Vertical Mark IV Std Range LDL Std Large Vertical DDC Controls Ext Range Less Board LML High Static Large Vertical Mark IV Ext Range LDS Std Large Vertical DDC Controls...
Page 3: ...on submittal drawings 7 The installing contractor will find it beneficial to confer with piping sheetmetal ceiling and electrical foremen together before installing any conditioners Note Check the un...
Page 4: ...2 114 mm 51 2 140 mm 25 8 61 mm Figure 2 Side view from piping end Each unit is shipped with a filter bracket for side filter removal Two fan discharges and piping arrangements are available With the...
Page 5: ...pitch diameter for desired speed by open ing moving parts by half or full turns from closed position Do not open more than five full turns 3 Replace external key E and securely tighten setscrews B ove...
Page 6: ...ication limits It is also general practice to close off the ventilation air system during unoccupied peri ods night setback The ventilation air system is generally a separate build ing subsystem with...
Page 7: ...he union one to hold the line and one for simultaneous tightening of the nut 4 Supply and return shutoff valves are required at each con ditioner The return valve is used for balancing and should have...
Page 8: ...ermostat to Cool If the thermostat is an automatic changeover type simply set the cooling temperature to the coolest position On manual changeover types addi tionally select Cool at the system switch...
Page 9: ...e with local codes or the National Electrical Code whichever is applicable 2 Apply correct line voltage to the unit Each unit is supplied with a 3 lug terminal block in the main control for three phas...
Page 10: ...BK 21 15 Fan Motor GN GND YE RD BK Common Comp Fan Mark IV AC Board Compressor Contactor 36 35 21 L1 37 37 Breaker Optional OR 230V RD 208V BK RD 460V BK BK YE GND Xformer REV Valve Solenoid COF LT L...
Page 11: ...itch BK WH BK WH BR BR BL BL BR53 Low Temp BR BR BL BL RD54 BR52 BK51 BL50 BL40 BK41 BR43 RD44 BR42 BK51 BL50 BL40 BK41 YE Condensate Overflow Sensor BK30 BK49 RD48 BK BK BK59 RD58 BK BK 1 2 5 3 4 BR8...
Page 12: ...troller 68 67 66 65 64 63 62 1 2 3 4 5 6 7 11 10 9 8 7 6 5 4 3 2 1 J6 2 3 4 5 7 8 9 10 11 J5 J4 Low Temp SIG Lo Press SIG Condensate Lo Temp SRC RV Out Comp Com Comp Out Fan Com Fan Out 24VAC 24V Gnd...
Page 13: ...3 4 1 2 3 4 1 J2 J1 2 1 46 Disch Air Water Out 44 42 43 Condensate Lo Temp SRC Lo Temp SIG Lo Press SIG Lo Press SRC Hi Press SIG RV Com RV Out Comp Com Comp Out Fan Com Fan Out 24VAC 24V Gnd Dischar...
Page 14: ...he reversing valve is set up to be energized in the heating mode The circuit board has a fan interlock circuit to energize the fan whenever the compressor is on if the thermostat logic fails to do so...
Page 15: ...s of the standard thermostat are then connected to the Mark IV AC board thermostat inputs and control inputs as needed Any re maining board input s may be operated by additional thermostat out puts or...
Page 16: ...application guide LIA217 for thermostat 107095901 installation details WSHP Mark IV AC Board Low Voltage Terminal Strip Circuit1 O W2 G W1 Y1 F E L U A P V R C R C W1 Y1 W2 Y2 G Thermostat Terminals W...
Page 17: ...t Sizes 180 to 290 Non Programmable Electronic Thermostat 2 Circuits P N 107095901 7 Day Programmable Electronic Thermostat 2 Circuits P N 107095901 Includes Thermostat and Wall Plate Refer to the ins...
Page 18: ...ressor operation is required the Mark IV AC P terminal will change state causing a contact closure between terminal 58 and 64 signaling the loop water control LWC panel to restart the loop pump if Off...
Page 19: ...wn below can only be used when the P terminal is not being used as a pump restart signal to other equipment If the P terminal must be used as a pump restart signal to other equipment then wire the aux...
Page 20: ...kit you attach the sheet metal enclosure to the unit as shown route the 4 wire harness through knockouts and connect to the Mark IV AC board mount and connect and insulate the water tempera ture senso...
Page 21: ...rmally open contacts will close Operation In this example the auxiliary relay is used to interface other control devices to the Mark IV AC board Using the Orange and White wires and 24vac or 24vdc ano...
Page 22: ...ot required 3 Fresh Air Damper These outputs provide a signal that can be used to control a remote fresh air damper The output will energize when the unit fan is energized and de energize when the uni...
Page 23: ...eating Check compressor wiring for defective wiring or loose connection Check thermostat for improper location Check for defective compressor internal windings with ohm meter Check for bad compressor...
Page 24: ...s will depend upon the project requirements Some applications such as motels produce a lot of lint from carpeting and linen changes and will require more frequent filter changes It is suggested that t...
