McQuay WML Installation Manual

Installation & Maintenance Data IM 447-7

Installation & Maintenance Data

Console Water Source Heat Pump

Group: WSHP Part Number: 107225601

Date: October 2004

Contents

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

Checking for Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,4

Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Cabinet Power Connections . . . . . . . . . . . . . . . . . . . . . . . 5

Water Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Cleaning & Flushing System . . . . . . . . . . . . . . . . . . . . . . . 7

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

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Unit Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Wiring Diagrams – Mark IV/AC-Units . . . . . . . . . . . . . . 9,10

Control Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Thermostats – Mark IV/AC-Units . . . . . . . . . . . . . . . . . . 12

Pump Restart Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

MicroTech Control Units . . . . . . . . . . . . . . . . . . . . . . . 14,15

Field Installed Options . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Optional Outside Air Damper . . . . . . . . . . . . . . . . . . . . . 18

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18,19

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

IM-447 / Page 1

Product Category

W = WSHP

Product Identifier

See box below

Model Nomenclature

NOTE: For illustration purposes only. Not all options available with all models.

Please consult a McQuay Sales Representative for specific availability.

McQuay WSHP Product Nomenclature

W WDA 1 009 E Z

Design Series

1 = A Design 2 = B Design 3 = C Design 4 = D Design 5 = E Design

Nominal Capacity

007 = 7,000 009 = 9,000 012 = 12,000 015 = 15,000 019 = 19,000

McQuay WSHP Product Identifiers

WDA = Flat Top Wall mtd./DDC Controls/Low Sill WDB = Slope Top Wall mtd./DDC Controls/Low Sill WDD = Slope Top Wall mtd./DDC Controls/Low Sill/Chassis Only WDE = Slope Top Wall mtd./DDC Controls/Low Sill/Chassis Only WDF = Flat Top Wall mtd./DDC Controls/High Sill WDG = Flat Top Wall mtd./DDC Controls/High Sill/Less Board WDH = Slope Top Wall mtd./DDC Controls/High Sill/Less Board WDS = Slope Top Wall mtd./DDC Controls/High Sill WLA = Slope Top Wall mtd./Mark IV/High Sill/Low Limit, NSB & Override WLB = Flat Top Wall mtd./Mark IV/Low Sill/Low Limit, NSB & Override WLC = Slope Top Wall mtd./Mark IV/Low Sill/Low Limit, NSB & Override WLL = Flat Top Wall mtd./Mark IV/High Sill/Low Limit, NSB & Override

Coil Options

(None)

Voltage

A = 115-60-1 E = 208/230-60-1 J = 265-60-1 M = 230-50-1

WMA = Slope Top Wall mtd./Mark IV/Low Sill WMB = Flat Top Wall mtd./Mark IV/Low Sill WMC = Flat Top Wall mtd./Mark IV/High Sill/Chassis Only WMD = Flat Top Wall mtd./Mark IV/Low Sill/Chassis Only WME = Flat Top Wall mtd./Mark IV/High Sill/European Spec. WMF = Flat Top Wall mtd./Mark IV/High Sill WMG = Slope Top Wall mtd./Mark IV/High Sill/Chassis Only WMH = Slope Top Wall mtd./Mark IV/Low Sill/Chassis Only WMJ = Flat Top Wall mtd./Mark IV/Low Sill/European Spec. WMK = Flat Top Wall mtd./Mark IV/High Sill/Chassis Only/European Spec. WML = Flat Top Wall mtd./Mark IV/Low Sill/Chassis Only/European Spec.

The information in this catalog supersedes and replaces previous (bulletins) with regards to McQuay Terminal Air Conditioning products.

Illustrations cover the general appearance of McQuay products at the time of publication and McQuay reserves the right to make changes in

Page 2 / IM 447

©McQuay Incorporated 2004

design and construction at anytime without notice.

Checking for Damage

Upon receipt of the equipment, check carton for visible damage. Make a notation on the shipper’s delivery ticket before signing. If there is any evidence of rough handling, the cartons should be opened at once to check for concealed damage. If any damage is found, notify the carrier within 48 hours to establish your claim, and request their inspection and a report. The Warranty Claims Department should then be contacted.

Do not stand or transport the machines on end. For storing,

each carton is marked with “up” arrows.

In the event that elevator transfer makes upended

positioning unavoidable, absolutely insure that the machine

is in the normal upright position for at least 24 hours before operating.

Temporary storage at the jobsite must be indoors, completely sheltered from rain, snow, etc. High or low temperatures naturally associated with weather patterns will not harm the conditioners. Excessively high temperatures of 140˚F (60˚C) may deteriorate certain plastic materials and cause permanent damage. In addition, the solid-state circuit boards may experience operation problems.

Note: Care should be taken when handling this equipment. Rough handling can create damage to internal electrical and refrigeration components.

Installation

Installation and maintenance are to be performed by qualified personnel who are familiar with local codes and regulations, and experienced with this type of equipment. Caution: Sharp edges and coil surfaces are a potential injury hazard. Avoid contact with them.

General:

1. Units must be installed in accordance with all applicable codes.

2. To prevent damage, this equipment should not be operated for supplementary heating and cooling during the construction period.

3. Inspect the carton for any specific tagging numbers indicated by McQuay International per a request from the installing contractor. At this time, the voltage, capacity and model should be checked against the plans.

4. Check the unit size against the plans to be sure that the unit will be installed in the correct location.

5. Units should be kept in shipping carton until installed. At the time the unit is to be placed in its final position – and only then – should the carton be removed. Retain the carton and cut away one side and bottom. Take the remaining portion of the carton and place it over the unit. This will insure the unit is protected from paint spotting, dirt, dust and lint that can affect proper unit operation, and will also prevent needless cleaning adding to installation cost.

6. The installing contractor will find it beneficial to confer with other contractors; i.e., plumbing, electrical, pipe fitters, etc., before installing any conditioners.

7. Remove the front panel by removing a screw on each side of the cabinet at the subbase.

8. All piping and electrical wiring should be flexible so that vibrations are not transmitted to the building structure. Ensure all electrical connections are in place and tight.

9. Locate the unit in an area that allows easy removal or accessibility for service personnel to perform maintenance and repair.

10. If units are placed on a concrete floor, it is recommended that the floor be free from all construction debris that may add to the operating noise level of the unit. It may be advisable to place a portion of rubber matting under the unit to prevent distortion and/or vibration.

Unit Location

1. Console water source heat pumps are designed to be installed in a controlled environment.

2. All units are to be installed against a wall.

3. Each unit should be located on the architectural plans. The supply, return, and condensation piping should be located accordingly, making sure the piping will fit into the confines of the subbase and cabinet.

Installing the Unit

1. Consult job blueprints for unit location. Clean area where unit is to be installed, removing all construction dirt and debris.

2. Remove unit from shipping carton and save the carton. Remove the front panel by removing a screw on each end of the cabinet. Lift the cabinet up, forward and off.

3. Each chassis is mounted to cabinet backwrap and subbase assembly by six screws for shipment. Remove four screws, two on each side of the chassis at the subbase.

4. Position cabinet backwrap and subbase against the wall where unit is to be installed. Ensure adequate room exists for piping and electrical connection in the subbase by checking the connection end of the subbase.

5. Using a carpenter’s square and level, make sure unit is level and that it is at a 90-degree angle with the wall and floor. (Note: If the floor and wall are not at right angles, it may be necessary to shim the subbase to insure proper installation. McQuay International will not accept responsibility for units that may need to be shimmed. Poor or inadequate installation could create noisy unit operation.)

6. The cabinet backwrap has slots on the back flange to mount the assembly to the wall. It is the contractor’s responsibility to select the correct fastener for each unit.

7. After securing the subbase and backwrap assembly in place, insert the chassis if it has been removed. Next, the electrical connection should be made.

IM-447 / Page 3

Figure 1. Cabinet backwrap &-subbase

*Total unit is 103/4" (273mm) deep. The cabinet extends beyond the subbase

Dimensions in inches

Dimensions in mm

/4" (6mm) in the back and 1/2" (14mm) in the front.

Unit Type Unit Size A B C Standard 007 – 012 46 45 25

Height 015 – 019 54 53 25

Unit Type Unit Size A B C Standard 007 – 012 1168 1143 635

Height 015 – 019 1372 1346 635

10.0"*

(245mm)

Backwrap

Subbase

Figure 2. Chassis (Left-hand slope top unit shown)

Control Diagram

Air Coil

Water Return

Water Supply

All Pipe Fittings Are To Be Field Installed

Junction Box

Flexible Hoses

Ball Valves

Electric Conduit

9.0"

(229mm)

(127mm)

5.0"

Condensate Line–14" (356mm) Clear Vinyl

Hose Clamp

Wiring Diagram

Fan/Coil Section Access Panel

Escutcheon Plate

Compressor/ Control Box Access Cover

Page 4 / IM 447

Electrical Connections

Standard Electrical Connection

Each chassis comes with a junction box mounted on the side of the chassis and contains the field electrical connection.

Note: If electrical wiring or conduit comes through the

floor, all wires or conduit should be sealed at this point. It will prevent any condensation or water leakage that may occur due to lack of preventive maintenance. Each unit has an internal condensate trap but will require cleaning.

Note: We suggest wiring coming through the wall should

also be sealed to stop cold air infiltration through the wall cavity which could affect unit thermostat operation.

Remove the junction box cover, selecting the proper knockout and remove it. Install a strain relief and pass the wires through the strain relief into the junction box making the connection and reinstall the junction box cover.

Note: Check the local code concerning correct electrical connection.

Cord & plug electrical connection (field installed)

Cord connected equipment comes with a box and appropriate voltage receptacle. However, a disconnect switch and fuses can also be provided in the box. As an option, the box comes factory mounted on the backwrap and is ready to be field wired to the incoming power. The box is mounted on the same side as the piping.

It is the responsibility of the installing contractor to make the proper electrical connection to the electrical box, using the same method as described in the standard electrical connection. See Figures 3 and 4.

Figure 3. Standard electrical connection – Junction box

Air Coil

Junction Box

Electrical Conduit

Floor

1.0"* (25mm)

*1.0" (25mm) from inside surface of wall

9.0"

(229mm)

5.0" (127mm)

Figure 4. Cord & Plug Connection (Field Installed)

Power Cord

Receptacle Plug

Control Box

Escutcheon Plate

Compressor Cover

Wiring Diagram

Fan Motor Cover

Cabinet Power Connection

(Field Installed)

Receptacle, Fuses & Disconnect Switch

(Requires plug cord on chassis.)

RECEPTACLE

GR/YE

Fuse Holder

Switch

Backwrap

Fuse Disconnect Box

10.0"

(254mm)

5.00" (127mm)

Fuse

Disconnect Switch

Fuse

WH or RD

Fused Disconnect Box

Wire Diagram 61408101

REV

IM-447 / Page 5

Water Connections

All piping connections should be made using good plumbing practices and in accordance with any and all local codes that may apply. Note: It will be helpful to read the “Piping” section on page eight.

Unit Piping Connection

Each heat pump is supplied with extended copper tubing on the water-to-refrigerant coil and connections are for both the supply and return water connections.

Note: Valves – Shut off Combination Balancing Valves,

Hoses – Supply Return, Condensate Drain Hose and 90° Elbows are all factory available as accessories, (to be mounted in the field by others).

/2" (12.7mm) OD tubing. The

Shutoff/Balancing Valve

Each heat pump requires a shutoff valve on both the supply and return lines for easy serviceability and removal if it becomes necessary.

We suggest using our combination shutoff/balancing valves installed in the field between the contractor’s piping and the heat pump unit. The valve installed on the return line acts as a balancing valve to adjust the proper water flow. Each shutoff/balancing valve has

/2" FPT ⳯ 1/2" FPT

threaded connections.

Suggested Hose Kit Installation

Field installed piping can be brought up from the floor or through the wall. Note: Make sure the pipes fit the confines of the piping compartment of the heat pump unit. See Figure 5.

Attach the field installed combination shut/off balancing valve to the building water supply and return piping. Next add the female pipe adapter connection to unit supply and return coil connection by sweating them in place using silver solder.

Next, using the specified hose kit, screw the fixed end

into the shut-off/balancing valve. Remove the

/2" adapter from the other end of the hose. Insert the adapter into the female fitting. Using two crescent wrenches, one to hold the pipe connection and the second to tighten the adapter, insert the swivel end of the hose on the adapter and tighten. This completes the hose connection to standard heat pump equipment.

Adding Motorized & Valve Assemblies

All console water source heat pumps can be field installed with a motorized valve. All valves are mounted on the return line of each unit. All valve assemblies terminate with

/2"-NPT threaded connections and will also accommodate factory supplied hose kits. When installing the hose kits on valve assemblies, use the same method as outlined in “Suggested Hose Kit Installation” above.

Note: All plumbing connections are made the same way

whether or not the unit has valve packages. Whether or not you utilize our hose kits and shutoff/balancing valve all piping connections will have to conform with all local piping and building codes. The ability to remove the unit in order to perform repairs is imperative.

Condensate Hose Connection

Each unit is supplied with a 3/4" (19mm) I.D. clear vinyl condensate hose internally trapped within the chassis. The hose extends 14" (356mm) out of the chassis within the piping compartment to reach the floor or the back wall.

Field condensate piping must enter within the confines of the cabinet (back wall or floor) similar to the supply and return piping. Slide the vinyl hose over the condensate pipe and clamp it.

NOTE: Valves, (shut-off combination balancing valves), Hoses, (supply and return, condensate drain hose), also 90° elbows are all factory available as accessories, to be mounted in the field by others.

Water Return

Water Supply

All Pipe Fittings Are To Be Field Installed

Junction Box

Flexible Hoses

Ball Valves

9.0"

(229mm)

Air Coil

Control Box

5.0"

(127mm)

Escutcheon Plate

Compressor/Control

Box Access Cover

Wiring Diagram

Fan/Coil Section Access Panel

Condensate Line–14" (356mm) Clear Vinyl

Hose Clamp

Page 6 / IM 447

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