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IM 778 / Page 3

Unit location

1. Locate the unit in an area that allows for easy removal of

the filter and access panels, and has enough space for
service personnel to perform maintenance or repair.
Provide sufficient room to make water, electrical and
duct connections.

2. The contractor should make sure that access has been

provided including clearance for duct collars and fittings
at water and electrical connections.

3. Allow adequate room around the unit for a condensate

trap.

4. The unit can be installed “free standing” in an equipment

room; however, closet installations are more common for
small vertical type units. Generally, the unit is located in
the corner of a closet with the non-ducted return air fac-
ing 90° to the door and the major access panels facing
the door as in Figure 1. Alternatively, the unit can have a
ducted return air with the opening facing the door and
the major access panels facing 90° to the door as in
Figure 2.

5. It is recommended that the unit be located on top of a

vibration absorbing material such as rubber or carpet to
reduce any vibration. See Figure 8, page 6.

6. If optional field installed 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
Figures 1 and 2. 

Minimum distance requirement from return air duct
collar to wall, for non-ducted units.

Model

Distance

007 – 012

4 inches

019 – 024

5 inches

030 – 036

6 inches

042 – 048

8 inches

Filter access

Each unit is shipped with a filter bracket for side filter 
removal.

Heat Pump with

Left-Hand
Return Air

Arrangement

Heat Pump with

Right-Hand

Return Air

Arrangement

Heat Pump with

Left-Hand
Return Air

Arrangement

Heat Pump with

Right-Hand

Return Air

Arrangement

Return

Air

Opt. Controls

Elec. Entrance

Main Access Panel

Return

Air

Opt. Controls

Elec. Entrance

Main Access Panel

Condensate

Water Supply

Water Return

Condensate

Water Supply

Water Return

Return Air Thru

Louvered Door

Risers

Return Air Thru

Louvered Door

Return

Air

Duct &

Grille

Opt. Controls

Elec. Entrance

Main Access Panel

Opt. Controls

Elec. Entrance

Main Access Panel

Condensate

Water Supply

Water Return

Condensate

Water Supply

Water Return

Risers

Return

Air

Duct &

Grille

NOTE:

Minimum distance

requirement for non-ducted
units. (see chart above).

Figure 1. Typical closet installation with louver door return 

Figure 2. Typical closet installation with ducted return 

Содержание Enfinity series

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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