McQuay LVC096 User Manual

Enfinity™ Large Vertical Water Source Heat Pumps with R-410A Refrigerant

Vertical Models LVC Standard Range & LVW Geothermal Range Unit Sizes 072 – 290 (6 to 25 Tons) • R-410A Refrigerant

Catalog 1109-1

Engineered for exibility and performance™

Table of Contents

Introduction

........................................................................4

Nomenclature.....................................................................4

Features & Options ............................................................5-6

Control Features ...............................................................7-10

Control Features ............................................................7

MicroTech III Controller ..................................................8

I/O Expansion Module ....................................................9

MicroT

ech III Controller with Communication Module ..10

Applications ....................................................................11-16

Unit Location ................................................................ 11

Vibration Isolators ........................................................12

Ductwork &

Attenuation ................................................13

Typical Cooling and Heating Refrigeration Cycles .......14

Systems ..................................................................15-16

SO Performance Data ................................................17-18

Water Loop ...................................................................17

Ground Loop ................................................................17

Ground Source .............................................................18

Heating & Cooling Capacity Data

Large Vertical Unit ......................................................19-34

Cooling Size 072 @ 2400 SCFM .................................19

Heating Size 072 @ 2400 SCFM .................................20

Cooling Size 096 @ Heating Size 096 @

3000 SCFM .................................21

3000 SCFM .................................22

Cooling Size 120 @ 4000 SCFM .................................2

Heating Size 120 @ 4000 SCFM .................................24

Cooling Size 180 @ 6000 SCFM .................................25

Heating Size 180 @ 6000 SCFM .................................26

Cooling Size 215 @ 7167 SCFM .................................27

Heating Size 215 @ 7167 SCFM .................................28

Cooling Size 290 @ 9670 SCFM .................................29

Heating Size 290 @ 9670 SCFM .................................3

Operating Limits ..............................................................32

Correction Factors ..........................................................33

Airow Correction Factors ............................................33

Anitfreeze Correction Factors ......................................33

Physical Data ...................................................................34

Performance Data - Fan Curves ................................35-36

Size 072, 096 & 120 .....................................................3

Size 180, 215 & 290 .....................................................36

Dimensional Data .......................................................37-39

Size 072 & 096 .............................................................3

Size 120 & 180 .............................................................38

Size 215 & 290 .............................................................39

Accessories ................................................................40-47

2" Filter Rack & Return Air Duct Collar ...................40-41

Supply and Return Hoses ............................................42

Condensate Hose Kit ...................................................42

Combination Balancing & Shutof

f (Ball) Valves ...........43

Motorized Valve ............................................................43

Multiple Unit Control Panel (MUCP)

.............................4

Thermostats and Wall Sensors ...............................44-45

Control Connection Diagrams .................................46-47

Typical Wiring Diagrams ............................................48-50

MicroT

Communication Module – 208/230V, 460V, 575V-60-3

Unit Sizes 096-120 .......................................................

MicroT Communication Module 208/2

ech III Controller with I/O Expansion Module &

ech™ III Controller with I/O Expansion Module &

30V, 460V, 575V-60-3

1.5 HP Motor ................................................................49

MicroT Communication Module 208/2

Unit Size 290 ................................................................50

ech™ III Controller with I/O Expansion Module &

30V, 460V, 575V-60-3

Electrical Data ..................................................................31

“McQuay” is a registered trademark of McQuay International.

The information in this manual supersedes and replaces previous catalogues with regards to McQuay Water Source Heat Pump products. Illustrations cover the general appearance of McQuay International products at the time of publication and McQuay International reserves the right to make changes in design and construction at anytime without notice.

™®The following are trademarks or registered trademarks of their respective companies: LonTalk from Echelon Corporation, BACnet from ASHRAE, Protocol Selectability, and MicroTech II from McQuay International.

Catalog 1109-1 McQuay Large Vertical Water Source Heat Pumps Page 3 of 56

Engineering Guide Specications ............................51-53

Introduction

Large Vertical Water Source Heat Pumps - Models LVC & LVW Sizes 072 - 290 (6 to 25 Tons)

 Model LVC (Standard Range: 55°F to 110°F)  Model LVW (Geothermal Range: 30°F to 110°F)

Large Vertical Water Source Heat Pump units are easily

located in equipment rooms or oor-by-oor installations.

They can be applied to all building types where it is advantageous to extend the water source heat pump concept to larger or core areas.

Each heat pump is factory assembled and run tested for reliability. Service is accomplished through multiple front, back and side access panels. Access is available to all serviceable components. Each unit ships on a wooden skid and covered with plastic to facilitate moving with a fork truck.

Two unique frame sizes make up our 6- through 25-ton product line - each with a consistent shape for easy layout of the ductwork, water piping, condensate piping and electrical connections.

Units are constructed of heavy gauge G-60 galvanized steel. The interiors of all framework and panels are covered with 1/2" thick, 1½ lb. dual-density berglass insulation.

Electrical components are located in the lower section, adjacent to the compressor(s). Knockouts are provided on both sides of the unit to facilitate main power and low voltage wiring through separate holes. Each unit is rated to accept time delay fuses for branch circuit overcurrent protection. Each unit is listed with CETL.

The control box is accessible through the compressor section access panel. The control box houses the major operating electrical controls, including the control circuit board(s), transformer, compressor contactor(s), fan contactor(s) and terminal block. Each component is accessible for service or replacement.

The standard control for all large capacity units is the

MicroTech™ III controller. The unit controller receives its

power from the 75VA control transformer. A LonWorks® or BACnet® communication module is available as a

selectable option.

Standard 1" lters are supported by factory-mounted brackets for side removal in either direction.

Nomenclature

W LVC 1 215 B L Y S Y Y F Product Category

W = WSHP

Product Identier

LVC = Large Vertical - Standard Range LVW = Large Vertical - Geothermal

Design Series

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

Nominal Capacity

072 = 72,000 BTU/h 096 = 96,000 BTU/h 120 = 120,000 BTU/h 180 = 180,000 BTU/h 215 = 215,000 BTU/h 290 = 290,000 BTU/h

Controls

B = MicroTech III A = DDC Less Board

Network Module Option

L = LonWorks® Module B = BACnet® Module Y = None

Voltage

D = 208-60-3 F = 208/230-60-3 H = 230-60-3 K = 460-60-3 L = 575-60-3 N = 380-50-3

Reserved

Y = None

Reserved

Y = None

Condensate Overow

S = Standard Overow

Sensor

Current Sensing

Y = None

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

Please consult McQuay Sales Representative for specic availability.

Page 4 of 56 McQuay Large Vertical Water Source Heat Pumps Catalog 1109-1

LVC & LVW Features and Options

MicroTech® III Controller

Ennity Large Vertical Water Source

Heat Pumps Sizes 072 - 290 (6 to 25 Tons)

 Model LVC (Standard Range: 55°F to 110°F)  Model LVW (Geothermal Range: 30°F to 110°F)

1 Cabinet - Heavy gauge G-60 galvanized steel. 2 Insulation - All interior framework and panels are lined with

1/2" thick, 1½ lb. dual-density berglass insulation. Optional (IAQ) closed-cell foam insulation.

Filter - Standard 1" factory-installed lter rack with 1" throw-

away lter. Optional 2" lter rack with duct collar for eld

-installation.

Refrigerant Circuit - All units have a dual refrigerant circuit

with scroll compressors, thermal expansion valve, coaxial heat exchanger, nned tube airside coil and reversing valve.

Compressor Vibration Isolators - Standard feature for all units,

reduces vibration sound levels during compressor operation.

Schrader Connections - Four Schrader valves are located inside

the end access panel – one on the low side and one on the high side of the refrigeration circuit – for charging and servicing.

All valves are 7/16" SAE ttings.

onWorks®

I/O Expansion Module

MicroTech® III Controllers – Designed for exibility, the control

L Communication Module

BACnet® Communication Module

board is used in standalone applications in conjunction with the I/O expansion module for control of the second refrigerant circuit. A separate L

onWorks® or BACnet® communication

module can be easily snapped onto the board to allow communication with a building automation system. The control system accomodates the use of a two-stage heat/two-stage cool 7-day programmable or non-programmable wall-mounted thermostat, offered as a eld-installed option.

Electrical

- The control enclosure includes fan relay, compres-

sor relays, 24-volt control transformer, reversing valve solenoid coil, lockout circuits and control circuit board.

LED Annunciator – External LED status lights display fault

conditions to provide easy troubleshooting and diagnosis, visible without removing access panel.

External Pipe Connections – Supply and return pipe connec-

tions located outside the cabinet make pipe connections easy without removing access panels.

Safety

Controls (Not Shown) - Low and high refrigerant pressure

switches and low refrigerant suction temperature (freezestat) sensor.

Catalog 1109-1 McQuay Large Vertical Water Source Heat Pumps Page 5 of 56

LVC & LVW Features & Options

Large vertical water source heat pump units are easily located in small equipment rooms or oor-by-oor installations. They can be applied to all building types where it is advantageous to extend the water source heat pump concept to larger or core areas.

Two unique frame sizes make up our 6- through 25-ton product line - each with a consistent shape for easy layout of the ductwork, water piping, condensate piping and electrical connections.

Units are constructed of G-60 galvanized steel. The interiors of all framework and panels are covered with 1/2" thick, 1½ lb. dual-density berglass insulation. Closed-cell foam (IAQ) insulation is available as a selectable option, suitable for berglass-free applications. Multiple 1" lters are supported by factory-mounted brackets for side removal in either direction.

Figure 1: Front View with Access Panel Removed

The reversing valve is energized in the heating mode and will “fail-safe” to the cooling mode, which is the predominant mode of operation.

Both heat exchanger components incorporate advanced-

heat transfer technologies. The coaxial heat exhanger has a copper inner tube and steel outer tube. The large face area coil has copper tubes and aluminum ns. Geothermal units

include coil and piping insulation to protect against conden-

sation in low temperature applications.

Safety controls on each refrigerant circuit include a suc-

tion line temperature sensor, low refrigerant pressure and high pressure switches to lock out compressor operation at extreme conditions. The safety controls can only be reset from the main disconnect switch to prevent unauthorized reset. Each circuit has high and low side refrigerant service valves for refrigerant circuit diagnostics and charging.

Thermal Expansion Valve

Units include a Thermal Expansion Valve (TXV) for

refrigerant metering. The TXV allows the unit to operate at optimum efciency with uid temperatures ranging from 25°F to 110°F, and entering air temperatures ranging from 40°F to 90°F. The TXV precisely meters the exact amount of refrigerant ow through the system to meet the load and deliver rated heating and cooling capacity.

Fan Section

The fan section includes a belt-driven fan assembly, multiple DWDI forward curved fan wheels, solid fan shaft, steel ball bearings, three phase fan motor, adjustable motor sheave, adjustable motor base, fan pulley and insulated divider panel between the compressor section. Unit sizes 072 through 120 have two fan assemblies and unit sizes 180 through 290 have three fan assemblies. The fan motor is always located at the piping end, but may be relocated to the opposite side in the eld.

Figure 2: Belt-Driven Fan Assembly Compartment

Refrigeration System

All Large Vertical unit sizes have dual independent circuits. Each circuit includes a scroll compressor, reversing valve, water to- refrigerant coaxial heat exchanger, electronic expansion valve, airside coil, sightglass and safety controls.

The compressor is located adjacent to the compressor

access panel and isolated from a bottom panel with rubber isolators.

Page 6 of 56 McQuay Large Vertical Water Source Heat Pumps Catalog 1109-1

Factory Installed Options

Optional high static fan motors are available on each

unit size to handle increased CFM and static pressure

applications.

Control Features – Control Choices And Added Functionality

The control enclosure houses the major operating electri-

cal controls including the MicroTech® III controller and I/O expansion module, control transformer, compressor relays and fan relay. Each component is easily accessed for service or replacement.

Three unique control choices are offered with the Micro-

Tech III control system:

■ Standalone operation using a MicroTech III controller and I/O expansion module

■ MicroTech III controller and I/O expansion module with a

LonWorks® communication module

■ MicroTech III controller and I/O expansion module with a BACnet® communication module

Each option features direct quick-connect wiring to all unit-controlled components for “clean” wiring inside the control box. Each control circuit board receives power from a 75VA transformer.

Table 1: Control Options

Control Description Application Protocol

MicroTech III

(Standalone)

The MicroTech III controller is a standalone microprocessor-based control board conveniently located in the unit control enclosure for easy accessibility. The board is designed to provide ther-

mostat

control of a Water Source Heat

Pump using a two-stage wall thermostat. The unit controller provides unitwide control of the WSHP and control of the rst refrigerant circuit.

Each unit controller is factory programmed, wired, and tested for complete control of single zone, standalone operation of your McQuay Water Source Heat Pump.

Unit Controller

with

I/O Expansion

Module

The I/O Expansion Module is an exten-

ion of the Microtech III controller and provides control of the second refrigerant circuit. External display fault conditions to provide easy

troubleshooting and diagnosis of the second circuit.

LED status lights

Allows for:

•

Control of second refrigeration circuit.

U n i t- m o un te d or wall-mounted

thermostat

Wa l l- mo un t e d

her mos tat or

sensor

LonWorks

Communication

Module

BACnet

Communication

Module

he MicroTech III control system

accepts a plug-in L nication module to provide network

ommunications and added functional-

ity to easily integrate with an existing BAS. The communication module can be factory- or field-installed and is tested with all logic required to monitor and control the unit.

The

MicroTech III controller accepts

a plug-in BACnet communication module to provide network commu-

ications and added functionality to

easily integrate with an existing BAS. The communication module can be factory- or eld-installed and is tested with all logic required to monitor and control the unit.

onWorks commu-

Designed to be linked with a centralized building automation system (BAS) through a LonWorks com- munications network for centralized scheduling and management of multiple heat pumps.

Designed to be linked with a centralized building automation system (BAS) through a BACnet communications network for centralized scheduling and management of multiple heat pumps.

Lo nMa rk 3 .4 certied

BACnet

MS/TP

Catalog 1109-1 McQuay Large Vertical Water Source Heat Pumps Page 7 of 56

Control Features – MicroTech® III Controller

The MicroTech III Controller is a microprocessor-based control board conveniently located in the unit control box for easy access through a removable access panel. The standalone unit controller is a hard wired interface and provides all the necessary eld connections. The board can be wired for 24volt AC output to the wall thermostat by using terminals R & C. An LED annunciator is located on the front of the unit chassis to allow quick check of the unit operating status.

MicroTech III Operating Features

Assumes cycle fan operation-not continuous fan operation:

■ Start-up – The unit will not operate until all the inputs

and safety controls are checked for normal conditions.

■ Cooling mode – On a call for cooling from the wall ther-

mostat, the controller will energize the fan relay and stage compressors to satisfy the space temperature setpoint. When the load is satised, the controller will disable the compressor and fan.

■ Heating Mode – On a call for heating from the wall

thermostat, the controller will enable the fan, energize

circuit one reversing valve and circuit 1 compressor to

satisfy the space heating setpoint. If the space temperature setpoint is not satiseld, circuit two reversing valve and circuit 2 compressor will be energized and run until the heating setpoint at the thermostat is satised.

■ Random Start Power-up Delay Timer – In the event of

a building power outage, this feature prevents multiple units from starting simultaneously upon building power restoration.

■ Unoccupied Mode – A simple “grounded” signal between

terminals U and C (no power source required), puts the unit into the unoccupied mode for night setback operation.

■ Interstaging Timer – A default value of 5 minutes be-

tween staging of compressors, this feature minimizes short cycling of compressors and improves comfort.

■ Override Mode – A switch on the deluxe automatic

changeover thermostat can be activated during the unoccupied mode to put the unit back into the occupied mode for two hours for after-hours heating or cooling.

■ Motorized Valve/Pump Restart – The IV/PR (H8) ter-

minals on the The MicroTech III unit controller are used

to energize (open) a motorized valve or start a water pump to get water circulating prior to starting the compressor on call for heating or cooling. The IV/PR (H8) terminal may be “daisy chained” between a maximum of 200 units.

■ Brownout Protection – The MicroTech III unit controller

measures the input voltage and will suspend compressor and fan operation if the voltage falls below 80% of

the unit nameplate rated value. A unique LED status is

generated.

■ Unit Shutdown – A simple grounded signal puts the unit

into the shutdown mode. Compressor and fan operations are suspended. A unique LED status is generated.

■ Condensate Overow Protection – The

MicroTech III

controller incorporates a liquid sensor at the top of the

drain pan. Upon sensing water ow, cooling operation is suspended. A unique LED status is generated.

■ Remote Reset of Automatic Lockouts – The Remote

Reset feature provides the means to remotely reset auto-

matic lockouts generated by high-pressure and/or lowtemperature faults. When the MicroTech III controller is in automatic lockout due to one of these faults, and the cause of the fault condition has been alleviated, energizing the O-terminal for 10 seconds or more will force the control board to clear the lockout. A unit power cycle can also be used to clear an automatic lockout if the conditions causing the fault have been alleviated.

■ Intelligent Reset – The Fault Retry feature helps to

minimize nuisance trips of automatic lockouts caused by high-pressure and/or low-temperature faults. This feature clears faults the rst two times they occur within a 24-hour period and triggers an automatic lockout on the 3rd fault. The retry count is reset to zero every 24 hours.

■ Equipment Protection Control – The MicroTech III

controller receives separate input signals from the refrig-

erant high-pressure switch and the low suction line temperature sensor. In a high-pressure situation, compressor operation is suspended. In a low temperature situation, the unit goes into a defrost cycle where the unit is put into cooling operation for 60 seconds until the coaxial heat exchanger is free of ice. Each switch generates its own unique LED status.

Note: Most unit fault conditions are the result of operating

the equipment outside the unit specications.

Table 2: MicroTech III Controller LED & Fault Outputs

Mode / Fault

Occupied, Bypass, Standby Override Unoccupied On On Off Energized

Condensate Overow On Off Off De-energized

High Pressure 1 Fault Low Pressure 1 Fault Off Off On De-energized Low Temperature 1 Fault Flash Off Off De-energized

Brownout

Emergency Shutdown

Room/Return Temp Sensor 1 Failure

Service Test Mode

Enabled

Serial EEPROM Corrupted

Network “Ofine”

Received

Compressor relay/compressor terminal is labeled COMP, switched line of

the same electric input as any of the L1 terminals.

Status LED’s

, or Tenant Off On Off Energized

Air or Low

ellow Green Red Output-Terminal “A”

Off Off Flash De-energized

Off Flash Off De-energized

Flash Flash On De-energized

Flash Flash Flash De-energized

On On On De-energized

Off Off Off De-energized

Thermostat

Alarm Light

Page 8 of 56 McQuay Large Vertical Water Source Heat Pumps Catalog 1109-1

Control Features – I/O Expansion Module

I/O Expansion Module

The I/O Expansion Module is factory-installed for control of the second refrigeration circuit. The I/O Expansion Module has an independent LED an-

nunciator to identify operational fault conditions for the

electric heater.

Table 3: I/O Expansion Module LED & Fault Outputs

Invalid Conguration Jumper Setting

Base Board Communication Fail

High Pressure #2 Fault Off Off Flash De-energized Low Pressure #2 Fault Off Off On De-energized

Low Suction Temp #2 Fault Flash Off Off De-energized

Sensor Failures Low Suction Low Suction

EWT (w/ Boilerless EH only)

Service Test Mode Enabled Flash Flash Flash De-energized

Unoccupied Mode On On Off Energized

Occupied, Bypass, Standby, or Tenant Override Modes

Normal Operation

Note: Mode / Faults are listed in order of priority.

Boilerless electric heat only

Alarm/fault LED indications take precedence over service test mode LED

indication. The controller shall use service test mode if the service test mode jumper is installed, even if the LED’s indicate an alarm/fault.

/ Fault

Mode

Yellow Green Red

Temp #2, Flash Flash On De-energized

Off On Off De-energized

Status LED's

Terminal “A”

Flash Flash Off De-energized

Off Flash Flash N/A

Off On Off Energized

Thermostat Alarm

Light Output

Figure 3: I/O Expansion Module Conguration

Jumper Terminals

JP1 shorted in units with 2 compressors

JP1 through JP8 not used with 2 circuit units.

Catalog 1109-1 McQuay Large Vertical Water Source Heat Pumps Page 9 of 56

Control Features – MicroTech III with Communication Module

MicroTech® III Controller with LonWorks® or

BACnet

Each Ennity Large Vertical and Horizontal Water

Source Heat Pump can be equipped with a LonWorks or

BACnet communication module. The LonWorks module is LonMark 3.4 certied and designed to communicate over a LonWorks communications network to a Building Automation System (BAS). The BACnet module is designed to communicate over a BACnet MS/TP communications network to a building automation system. Both controllers are microprocessor-based and can be factory or eld-installed.

The control modules are programmed and tested with all the logic required to monitor and control the unit. Optional wall sensors may be used with the communication modules to provide limited local control of the Horizontal Water Source Heat Pump. The MicroTech III controller monitors water and air temperatures and passes information to the communication module. The module communicates with the BAS, to provide network control of the Water Source Heat Pump.

MicroTech III LonWorks Communication Module

The LonWorks communication module is designed for units that are integrated into a LonWorks communication

network for centralized scheduling and management of multiple heat pumps.

Communication Module

MicroTech III Controller with Communication Modules Features

The MicroTech III Controller with LonWorks or BACnet

Communication Module orchestrates the following unit

operations:

 Enable heating and cooling to maintain space temperature setpoint based on a room sensor setting

 Enable fan and compressor operation  Monitors all equipment protection controls  Monitors room and discharge air temperatures

 Monitors leaving water temperature  Relays status of all vital unit functions

An amber, on-board status LED indicates the status of the

MicroTech III LonWorks or BACnet module.

The MicroTech III Controller Includes:

 A unit-mounted return air sensor

 A unit-mounted discharge air sensor

 A leaving water temperature sensor

The communication modules provide network access to

setpoints for operational control

Available Wall Sensors Include:

 Room sensor

MicroTech III BACnet Communication Module

Designed to be linked with a centralized building automation system (BAS) through a BACnet communications network for centralized scheduling and management of multiple heat pumps.

 Room sensor with LED status and tenant override button

 Temperature sensor with LED status, timed-override button, and ±3°F setpoint adjustment

 Room sensor with LED status, timed-override button, 55° to 90°F setpoint adjustment

Page 10 of 56 McQuay Large Vertical Water Source Heat Pumps Catalog 1109-1

Unit Location

Control Box Location

Piping

Location

Fan Motor

24"

(610 mm)

Side B

Side A

24" (610 mm)

Large Vertical Water Source Heat Pump units are easily

located in equipment rooms or oor-by-oor installations.

They can be applied to all building types where it is advantageous to extend the water source heat pump concept to larger or core areas.

Locate the unit in an area that allows for easy removal of the lter and access panels, and has enough space for service personnel to perform maintenance or repair. Provide sufcient room to make water, electrical and duct connections.

Figure 4: Service Clearances

Applications

The main control panel is located in the center front of

the unit. The fan discharge is top front, and the fan motor is always located at the piping end. Unit sides opposite the control panel and opposite the piping side may be up against walls and still allow for service and maintenance through the remaining access panels.

Figure 5: Fan Deck Arrangements

The contractor should make sure that access has been provided including clearance for 2" (51 mm) thick lter brackets, duct collars and ttings at water and electrical connections. Allow adequate room around the unit for a condensate trap. The unit can be installed “free standing” in an equipment room. Generally, the unit is located in a separate room with the non-ducted return air facing the return air intake.

Alternatively, the unit can have a ducted return air. It is recommended that the unit be located on vibration isolators to reduce any vibration (see Figure 6, page 12).

IMPORTANT

1. A 24" (610 mm) minimum clearance is required on the return air, control box and piping sides. However, a 36" (914 mm) clearance allows for easier serviceability.

2. A 12" (305 mm) minimum clearance is required on Side A to gain access to panel to remove locking collar for shaft removal.

3. A 6" (152 mm) clearance is required on Side B to remove screws holding top panel.

4. Top clearance is required for fan shaft removal.

5. Some codes dictate a 60" (1524 mm) clearance above the control box which could be violated with a ducted

return. Check your local codes.

Rear (or Top)

Discharge

Right-Hand Piping

(Upblast-Rear)

Front (or Top)

Discharge

Right-Hand Piping

(Upblast-Front)

Fan

Motor

Front (or Top)

Discharge

Left-Hand Piping

(Upblast-Front)

Fan Deck Arrangements

Six fan discharge arrangements and two piping arrangements are available. With the return air side dened as the

Rear (or Top)

Discharge Left-Hand Piping (Upblast & Rear)

Straight Horizontal

Discharge

Left-Hand Piping

(Top-Horizontal Discharge)

Straight Horizontal

Discharge

Right-Hand Piping

(Top-Horizontal Discharge)

“front” of the unit, the water piping connections may be right-hand (side) or left-hand. All units have a single supply and return water connection with a copper FPT type tting that protrudes through the unit casing for easy connection.

The condensate connection is also a copper FPT type and is

located on both sides of the unit. The unused connection is plugged.

Catalog 1109-1 McQuay Large Vertical Water Source Heat Pumps Page 11 of 56

Notes:

1. The hand of unit is determined by looking at the return air (lter) side. The piping and electrical connections are always made on the “hand” side of the unit. The return air (lter) side is considered the “front” of the unit.

2. The fan motor is always located at the piping/electrical connection (hand) side of the unit.

3" (76 mm)

(76 mm)

3" (76 mm) 3" (76 mm)

Section A-A

(51 mm)

A A

/32"

(715 mm)

(4)

/16" (11 mm) holes

/16"

(11 mm)

/4"

(6 mm)

/32"

(1390 mm)

(51 mm)

2" (51 mm)

/8"

(765 mm)

/4" (83 mm)

(6)

/8" (19 mm) holes

/8"

(2042 mm)

/16"

(1021 mm)

4½" (114 mm)

5½" (140 mm)

2½" (64 mm)

2⅝" (61 mm)

7/16" (11 mm)

3/8" (10 mm) TAP

Applications

Vibration Isolators

Figure 6: Vibration Isolator Dimensions

For minimum sound and vibration transmission, it is recommended that the unit be mounted on vibration isolators.

Holes are provided in the bottom panel to facilitate con-

nection of isolators (see Figures 7-8 for hole locations).

Isolators supplied by the manufacturer are the type

shown in Figures 6. Four white isolators are used for single

compressor units and six green isolators are used for dual

compressor units. The holes in the bottom of the unit allow for a 3⁄8" (10 mm) bolt to be secured to the isolator.

Figure 7: Vibration Isolators Locations - Single Compressor Unit

Figure 8: Vibration Isolators Locations - Dual Compressor Unit

Page 12 of 56 McQuay Large Vertical Water Source Heat Pumps Catalog 1109-1

Ductwork and Attenuation

Discharge ductwork is normally used with these conditioners. Return air ductwork may also be required but will require eld installation of a return air duct collar.

All ductwork should conform to industry standards of good practice as described in ASHRAE Systems Guide.

The discharge duct system will normally consist of a exible connector, a transition piece to the nal duct size, a short run of duct, an elbow without vanes and a trunk duct tee’d into branch ducts with discharge diffusers. Transfor-

mation duct must not have angles totalling more than 30

degrees or severe loss of air performance can result.

All units have multiple fan outlets. The preferred method for minimum static pressure loss would be indi-

vidual ducts at each outlet connected to a larger main duct

downstream (Figure 9).

Figure 9: Suggested Supply Ducting per ASHRAE and SMACNA Publications

For minimum noise transmission, the metal duct material should be internally lined with acoustic brous insulation. The ductwork should be laid out so that there is no line of sight between the conditioner discharge and the distribution diffusers.

Return air ducts can be brought in adjacent to the return air of the conditioner. Typically, the equipment room becomes the common return air plenum.

Do not insert sheetmetal screws directly into the unit cabinet for connection of supply or return air ductwork, especially return air ductwork which can hit the drain pan or the air coil.

Notes:

1. Transformations to supply duct have maximum slope of 1" to 7".

2. Square elbows with double thickness vanes may be substituted.

3. Do not install ducts so that the air ow is counter to fan rotation.

If necessary, turn fan deck assembly and motor.

4. Transformations and units shall be adequately supported so no

weight is on the exible connection.

Applications

Flexible Connector

Fan Rotation (See Note

Branch Duct

Note 2

Note 1

Flexible Connector

Fan Rotation (See Note

Main Duct

Transformation Duct

Flexible Connector

Note 2

Flexible Connector

Fan Rotation (See Note 3)

Note 2

Fan Rotation (See Note

Distribution Diffuser

Trunk Duct

Catalog 1109-1 McQuay Large Vertical Water Source Heat Pumps Page 13 of 56

Applications

Typical Cooling and Heating Refrigeration Cycles – Dual Compressors

Note: Typical temperature readings are at full load conditions at ISO-13256 for boiler-tower applications.

Figure 10: Cooling Refrigeration Cycle

When the wall thermostat calls for COOLING, the reversing valve (de-energized) directs the ow of the refrigerant, a hot gas, from the compressor to the water-to-refrigerant heat exchanger (coaxial heat exchanger). There, the heat is removed by the water, and the hot gas condenses to become a liquid. The liquid then ows through a thermal expansion valve to the air-to-refrigerant heat exchanger coil (evaporator). The liquid then evaporates and becomes a gas, at the same time absorbing heat and cooling the air passing over the surfaces of the coil. The refrigerant then ows as a low pressure gas through the reversing valve and back to the suction side of the compressor to complete the cycle.

Figure 11: Heating Refrigeration Cycle

When the wall thermostat calls for HEATING, the reversing valve (energized) directs the ow of the refrigerant, a hot gas, from the compressor to the air-to-refrigerant heat exchanger coil (condenser). There, the heat is removed by the air passing over the surfaces of the coil and the hot gas condenses and becomes a liquid. The liquid then ows through a thermal expansion valve to the water-to-refrigerant heat exchanger (evaporator). The liquid then evaporates and becomes a gas, at the same time absorbing heat and cooling the water. The refrigerant then ows as a low pressure gas through the reversing valve and back to the suction side of the compressor to complete the cycle.

Page 14 of 56 McQuay Large Vertical Water Source Heat Pumps Catalog 1109-1

Applications – Systems

Water source heat pump systems are one of the most ef-

cient, environmentally friendly systems available for heating and cooling buildings. High-efciency, self contained units (sizes 7,000 btuh to 290,000 btuh) can be placed in virtually any location within a building. Each unit responds only to the heating or cooling load of the individual zone it serves. This permits an excellent comfort level for occupants, better control of energy use for building owners and lower seasonal operating costs. The Air-Conditioning Refrigeration Institute (ARI) and the International Standards Organization (ISO) publish standards so that water source heat pumps are rated for specic applications. The ARI/ISO loop options shown in this catalog are typical water source heat pump loop choices available in today’s market. These systems offer benets ranging from low cost installation to the highest energy efciency available in the market today.

Boiler / Tower Applications: ARI 320 / ISO 13256-1

A “Boiler/Tower” application uses a simple two-pipe water circulating system that adds heat, removes heat or transfers rejected heat to other units throughout the building. The water temperature for heating is generally maintained between 65ºF – 70ºF and is usually provided by a natural gas or electric boiler located in a mechanical room. The condensing water temperature, during cooling months, is maintained between 85ºF and 95ºF and requires the use of a cooling tower to dissipate waste heat. Cooling towers can be located on the roof, or inside or adjacent to the building. This application can be the lowest cost of the loop options available. Note: ASHRAE 90.1 standards require that circulating pumps over 10 HP will require use of “variable frequency drive” equipment and pipe insulation to be used whenever water temperatures are below 60 degrees and above 105 degrees. See ASHRAE 90.1 Standards for details.

Open Loop Well Water Applications: ARI 325 / ISO 13256-1

“Open Loop” well water systems use ground water to remove or add heat to the interior water loop. The key benet of an open loop system is the constant water temperature, usually 50ºF to 60ºF, which provides efcient operation at a low rst cost. Most commercial designers incorporate a heat exchanger to isolate the building loop from the well water. Using heat exchangers can reduce maintenance issues while still allowing the transfer of heat from unit to unit as with the “Boiler/Tower System”. A successful design provides an ample amount of groundwater (approximately 2 GPM per ton) and adequate provisions for discharging water back to the aquifer or surface. Open

Loop applications are commonly used in coastal areas

where soil characteristics allow reinjection wells to return the water back to the aquifer. Note that some states have requirements on the depths of return water reinjection wells, and such wells must be approved by the United States Environmental Protection Agency. Also, bad water quality can increase problems with heat exchanger scaling. Suspended solids can erode the heat exchanger. Strainers can be used to contain suspended solids.

Figure 13: Open Loop Well Application

Figure 12: Boiler/Tower Application

Catalog 1109-1 McQuay Large Vertical Water Source Heat Pumps Page 15 of 56

Applications – Systems

Closed Loop Geothermal Applications ARI 330/ISO 13256-1

“Vertical Closed Loop” applications are installed by drilling vertical bore holes into the earth and inserting a plastic polyethylene supply/return pipe into the holes. The vertical wells are connected in parallel reverse return fashion to allow the water from the building to circulate evenly throughout the boreeld. The circulating uid dissipates heat to the ground in a similar manner as a “tower” and adds heat back to the loop like a boiler. If properly designed, the loop eld can maintain the loop temperatures necessary to condition the building without the use of a boiler or a tower. Loop temperatures usually range from 37ºF to 95ºF in Northern climates. Southern applications can see temperatures ranging from 40ºF to 100ºF. The number of bore holes and their depth should be determined by using commercial software that is specically designed for vertical geothermal applications. Typical bore depths of a vertical loop range from 150 to 400 feet and generally require about 250 feet of surface area per ton of cooling.

Figure 14: Vertical Loop Application

Figure 15: Horizontal Loop Application

A “Surface Water” or “Lake” closed loop system is a

geothermal loop that is directly installed in a lake or body of water that is near the building. In many cases, the body of water is constructed on the building site to meet drainage or aesthetic requirements. Surface loops use bundled

polyethylene

as a vertical or horizontal loop using a parallel reverse return design. The size and the depth of the lake is critical. Commercial design services should be used to certify that a given body of water is sufcient to withstand the building loads. Loop temperatures usually range from 35ºF to 90ºF and prove to be the best cooling performer and lowest cost loop option of the three geothermal loops. Some applications may not be good candidates due to public access or debris problems from ooding.

coils that are connected in the same manner

Figure 16: Surface Water Loop Application

A closed loop “Horizontal” geothermal application

is similar to a vertical loop application with the exception

that the loops are installed in trenches approximately 5

feet below the ground surface. The piping may be installed using a “four-pipe” or “six-pipe” design and could require 1,500 to 2,000 square feet of surface area per ton of cooling. Loop temperatures for a commercial application can range from 35ºF to 95ºF in Northern climates. Southern climates can see temperatures ranging from 40ºF to 100ºF. Horizontal loops are generally not applied in urban areas because land use and costs can be prohibitive. New

advances

assembly time of horizontal loops while keeping the rst cost lower than a vertical loop.

Page 16 of 56 McQuay Large Vertical Water Source Heat Pumps Catalog 1109-1

in installation procedures have improved the

ISO Performance Data

Table 4: Water Loop

Unit Size CFM L/S GPM L/S Btuh

072

096

120

180

215

290

Airow Waterow

2300

3600

4000

6000

7167

9670

1085

1699

1888

3382

4564

18.5

22.2

0.0

46.0

54.0

80.0

1.17

1.40

1.89

2.90

.40

5.04

Voltage

208-60-3 230-60-3 460-60-3 575-60-3 208-60-3 230-60-3 460-60-3 575-60-3 208-60-3 230-60-3 460-60-3 575-60-3 208-60-3 230-60-3 460-60-3 575-60-3 208-60-3 230-60-3 460-60-3 575-60-3 208-60-3 230-60-3 460-60-3 575-60-3

72800

86500

119700

189200

220800

08800

21317

25328

35049

55400

6465

90420

Cooling Heating

Watts EER COP Btuh Watts COP

13.1

13.0

14.0

14.9

14.2

11.0

3.8

4.1

4.4

4.2

88500

100800

150200

209800

254800

422100

25914

29515

3980

61432

74608

3595

4.6

4.7

4.9

4.1

Table 5: Ground Loop

Unit Size CFM L/S GPM L/S Btuh

072

096

120

180

215

290

Airow Waterow

18.5

1085

2300

3600

4000

6000

7167

9670

1699

1888

3382

4564

22.2

0.0

46.0

54.0

80.0

1.17

1.40

1.89

2.90

.40

5.04

Voltage

74500

89200

3200

191200

229200

22400

21814

26119

55985

67112

94402

Cooling Heating

Watts EER COP Btuh Watts COP

6074

14.6

15.9

16.1

16.

12.4

59100

69700

4.3

4.7

98000

4.7

4.8

147600

260728

32000

305

20409

28695

8651

43219

76344

3.4

3.6

3.9

3.6

3.7

3.3

Catalog 1109-1 McQuay Large Vertical Water Source Heat Pumps Page 17 of 56

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