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McQuay

®

Enfinity

Vertical Water Source Heat Pumps

Unit Sizes 007 – 012 / R-22 Refrigerant

Unit Sizes 019 – 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
Options for Mark IV/AC Units . . . . . . . . . . . . . . . . 17-21
Field Installed Options on MicroTech Units . . . . . . . . 22
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . 23
Troubleshooting WSHP. . . . . . . . . . . . . . . . . . . . . 24-25
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Troubleshooting Refrigeration Circuit . . . . . . . . . . . . . 26

Installation & Maintenance Data

Group: WSHP

Part Number: 106751103

Date: June 2006

IM 778-2

©2006 McQuay International 

®

Summary of Contents for Enfinity series

Page 1: ...ng Flushing System 6 Start up 7 Operating Limits 8 Typical Wiring Diagrams 9 11 Unit Operation 12 14 Thermostat Connections 16 Options for Mark IV AC Units 17 21 Field Installed Options on MicroTech U...

Page 2: ...the location and routing of water piping conden sate drain piping and electrical wiring The locations of these items are clearly marked on submittal drawings 6 The installing contractor will find it b...

Page 3: ...controls are required boilerless system space must be provided for the enclosure to mount around the corner from the electrical entrances Do not locate the side of the unit too close to a wall See Fi...

Page 4: ...he return air duct should be internally lined with acoustic insulation for sound attenuation Glass fiber duct board material is more absorbing and may permit omission of the flexible connector Return...

Page 5: ...lance by measuring differential temperature reading across the water connections For proper water flow the differential flow should be 10 F to 14 F 5 C to 8 C for units in cooling mode A direct return...

Page 6: ...be off and the supplementary heat control set at 80 F 27 C While circulating water the contractor should check and repair any leaks in the piping Drains at the lowest point s in the system should be o...

Page 7: ...xceeds 35 F 19 C then the water flow rate is inade quate 6 Check the elevation and cleanliness of the condensate line If the air is too dry for sufficient dehumidification slowly pour enough water int...

Page 8: ...assumed that such a start up is for the purpose of bringing the building space up to occupancy temperature Geothermal range units FCW Geothermal range heat pump conditioners are designed to start up i...

Page 9: ...er primary wire 2 All temperature and pressure switches are nor mally closed 3 Component layout shown below is typical Some components may not be used on this model or voltage 4 Mark IV AC controller...

Page 10: ...y 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: ...or 208V operation If 230V power supply 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...

Page 12: ...On Off Unoccupied Mode On On Off Off Unit Shutdown Off Flash Off On In heating mode only The Remote Reset feature provides the means to remotely reset automatic lockouts generated by high pres sure an...

Page 13: ...it Controller Figure 16 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 On 5 1 2 sec Off 1 2 sec Tena...

Page 14: ...during occupied mode or to cycle ON or OFF appropriately on a call for heating and cooling Cooling mode On a call for cooling the compressor and fan start immediately Compressor run time is cal culat...

Page 15: ...hours of operation the attained temperature does not meet the software configurable setpoint for heating or cooling as appropriate a software alarm occurs The alarm automatically resets when the atta...

Page 16: ...IA204 4 for ther mostat 668054201 installation details Includes Thermostat and Wall Plate Refer to the installation operation application guide LIA217 for thermo stat 107095901 installation details 1...

Page 17: ...ite connections are short flying leads pre attached to the board The diagrams shown are some connection examples Auxiliary Relay P N 106059701 WSHP Mark IV AC Board Low Voltage Terminal Strip O W2 G W...

Page 18: ...ontrol box clos est to the thermostat The G W Y C and L con nections are short flying leads pre attached to the board A maximum of 3 boards may be used together if up to 4 units must be connected and...

Page 19: ...rminal must be used as a pump restart signal to other equipment then wire the auxiliary relay s yellow wire to Y1 white wire to W1 and orange wire to C then the valve will open on a call for occupied...

Page 20: ...SK is required for each unit To use the BSK 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 conne...

Page 21: ...oop pump if Off The pump restart relay kit is typically mounted within one WSHP or within the LWC panel whichever is more conve nient diagrams are provided below for each location To install the relay...

Page 22: ...Auxiliary Module Kit 107239001 must be used and these additional output con trol signals will be connected to the Auxiliary board The Auxiliary board is provided in all 2 circuit units 1 circuit unit...

Page 23: ...t Pump and not accessible 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 ther mostat...

Page 24: ...ure lockout A Cool mode check water flow B Heating mode check air flow C Check reversing valve for proper valve position Check compressor overload make sure it is closed Check compressor to ground or...

Page 25: ...nges Check filters at 60 day intervals for the first year until experience is acquired If light cannot be seen through the filter when held up to sunlight or a bright light it should be changed A more...

Page 26: ...ulb and Capillary Tube Compressor Coil Air to Refrigerant Heat Exchanger Normal Low Troubleshooting Refrigeration Circuit Cooling Refrigeration Cycle When the wall thermostat is calling for COOLING th...

Page 27: ...o 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...

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