McQuay Enfinity CCH series Installation & Maintenance Data Download Page 1

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Installation & Maintenance Data

McQuay

Enfinity

™

(R-410A) and Standard (R-22)

Horizontal Water Source Heat Pumps

Model CRH, CRW Unit Sizes 007 – 070 / R-22 Refrigerant
Model CCH, CCW Unit Sizes 007 – 060 / R-410A Refrigerant

Contents

Model Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Transportation & Storage . . . . . . . . . . . . . . . . . . . . . . . . 2

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Cleaning & Flushing System . . . . . . . . . . . . . . . . . . . . . 6

Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Typical Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . .9-11

Unit Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-14

Thermostat Connections . . . . . . . . . . . . . . . . . . . . .16-17

Options for Mark IV/AC Units . . . . . . . . . . . . . . . . . .18-21

Field Installed Options on MicroTech Units . . . . . . . . . 22

Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . 23

Troubleshooting WSHP . . . . . . . . . . . . . . . . . . . . . .24-25

Troubleshooting Refrigeration Circuit . . . . . . . . . . . . . . 25

Typical Refrigeration Cycles . . . . . . . . . . . . . . . . . . . . . 26

General Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Group:

WSHP

Part Number:

106586605

Date:

September 2007

IM 742-4

Summary of Contents for Enfinity CCH series

Page 1: ...Electrical Data 5 Piping 5 Cleaning Flushing System 6 Start up 7 Operating Limits 8 Typical Wiring Diagrams 9 11 Unit Operation 12 14 Thermostat Connections 16 17 Options for Mark IV AC Units 18 21 Fi...

Page 2: ...eck the available ceiling height versus the height of the unit 6 Note the location and routing of water piping conden sate drain piping and electrical wiring The locations of these items are clearly m...

Page 3: ...res 1A and 1B 6 When attaching the hanger rods to the unit a double nut is recommended since vibration could loosen a single nut The installer is responsible for providing the hex nuts when installing...

Page 4: ...etween the conditioner discharge and the distribution diffusers Return air ducts can be brought in through a low side wall filter grille and then up through the stud pieces to a ceiling plenum or thro...

Page 5: ...rmance and minimum sound requirements Fan sound levels and performance can be affected by external static pressure changed Disconnect and cap the red lead wire and inter change it with the orange lead...

Page 6: ...ure 7 Figure 7 Supply return runouts connected together 2 Fill the system at the city water makeup connection with all air vents open After filling close all air vents The contractor should start main...

Page 7: ...erature rise through the machine should not exceed 35 F 19 C If the air tempera ture exceeds 35 F 19 C then the water flow rate is inadequate 6 Check the elevation and cleanliness of the condensate li...

Page 8: ...di tion It is assumed that such a start up is for the purpose of bringing the building space up to occupancy temperature temperature and or humidity and equipment performance reliability and service l...

Page 9: ...ervice personnel should be observed or dam age to controller may result 5 Terminal block on Mark IV AC board provides 24 VAC at terminals R and C All other outputs are 24 VDC 6 Field supplied relays i...

Page 10: ...is used transformer must be rewired by disconnecting the power lead from the red transformer primary wire and connecting the power lead to the orange transformer primary wire Place an insulation cap...

Page 11: ...ce an insulation cap on the red transformer primary wire 2 All temperature and pressure switches are normally closed Notes 1 A 208 230V unit is factory wired for 208V operation If 230V power supply is...

Page 12: ...ad ShedOff Off On Off Off Unoccupied Mode On On Off Off Unit Shutdown Off Flash Off On Page 12 IM 742 Unit Operation The Remote Reset feature provides the means to remotely reset automatic lockouts ge...

Page 13: ...ts IM 742 Page 13 MicroTech 2000 WSHP Unit Controller MicroTech 2000 Unit Controller LED Indication Status LED State Mode On Continually Occupied Occupied Load Shed On 1 2 sec Off 5 1 2 sec Unoccupied...

Page 14: ...operation Fan operation can be customized in software to run continuously during occupied mode or to cycle ON or OFF appropriately on a call for heating and cooling Cooling mode On a call for cooling...

Page 15: ...operation the attained temperature does not meet the software configurable setpoint for heating or cooling as appropriate a software alarm occurs The alarm auto matically resets when the attained tem...

Page 16: ...G Thermostat Terminals C R 7 Day Programmable Electronic Thermostat P N 107095901 Thermostat Connection Diagrams Mark IV AC Units Unit Sizes 007 070 Non Programmable Electronic Thermostat P N 66805420...

Page 17: ...t Grn Red Wall Sensor Locate the sensor on a wall where exposure to unrestrict ed air circulation represents the average temperature of the space A common mistake is to mount the sensor too close to t...

Page 18: ...e Mark IV AC board when using standard off the self relays The auxiliary relay can be used to provide fault signals unit operation signals or to provide a means for remote equipment to control the Mar...

Page 19: ...Control Panel O W2 G W1 Y1 F E L U A P V R C G W Y C L WSHP Mark IV AC Board Low Voltage Terminal Strip WSHP Mark IV AC Board Low Voltage Terminal Strip O W2 G W1 Y1 F E L U A P V R C 1 2 3 Auxiliary...

Page 20: ...Override Pot1 Boilerless System Board 43 Ohm 4 pin Plug Water Temperature Sensor Signal to remote duct heater control circuit F L W1 V Mark IV Board Terminals 9 66 245 mm 007 042 14 50 368 mm 048 060...

Page 21: ...ter Controller Terminals Daisy chain to other Mark IV AC board P and C terminals 64 58 65 WSHP Mark IV AC Board Low Voltage Terminal Strip Circuit 1 Pump Restart Relay 7 6 5 4 3 2 1 O W2 G W1 Y1 F E L...

Page 22: ...e WSHP chassis 24VAC Pilot Duty Relay by others Terminals Located on Microtech 2000 Auxiliary Board J6 24VAC Pilot Duty Relay by others Use contacts as needed for option Terminals Located on Microtech...

Page 23: ...cessible to the end user For example HP LT and COF are not available for use by the end user Typically the Mark IV AC board s R 24vac terminal is used to drive the board s thermostat inputs and contro...

Page 24: ...ing 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 cap...

Page 25: ...and atmosphere pressure it can become com bustible under pressure when mixed with air NOTE R 410A should not be mixed with air under pressure for leak testing Pressure mixtures of dry nitrogen and R...

Page 26: ...ng system to the air to refrigerant heat exchanger coil The liquid then evaporates becoming a gas at the same time absorbing heat and cooling the air passing over the surfaces of the coil The refriger...

Page 27: ...een through the filter when held up to sunlight or a bright light it should be changed A more critical standard may be desirable 3 The condensate drain pan should be checked annually and cleaned and f...

Page 28: ...to www mcquay com This document contains the most current product information as of this printing For the most up to date product information please go to www mcquay com Products Manufactured in an I...

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