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 III from McQuay International.
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 3
Introduction
Ennity
complete line of water source heat pumps for high efcien-
cy, individually-zoned comfort control in ofces, schools,
assisted living facilities, manufacturing facilities and other
commercial buildings. Our reputation for outstanding reliability and quiet operation has been reinforced in thousands
of successful installations.
our past and the best of what’s new. Using feedback from
building owners, consulting engineers, contractors and ser-
vice engineers, we designed Ennity products to give you
maximum exibility to design, install, operate and maintain
the ideal water source heat pump system for your building
project. And we incorporated non-ozone depleting R-410A
refrigerant, which–along with high Energy Efciency Ratios (EER’s)–helps preserve our environment and precious
energy resources.
™
Water Source Heat Pumps
More than 30 years ago, McQuay designed the rst
Ennity water source heat pumps incorporate the best of
With Ennity Water Source Heat Pumps,
you benet from:
High efciency that minimizes environmental impact
and lowers operating costs
Units exceed ASHRAE Standard 90.1 minimum
requirements
High efciency standard range or geothermal
application exibility
Easy, low-cost design and installation
Two congurations for each unit size (left or right
return) allow you to specify units to t space require
ments and to design the system using minimum ductwork and piping.
Four cabinet sizes, each with McQuay’s small footprint
design, make it easy to meet the space requirements of
your new construction or replacement application.
Flush FPT water ttings allow easy, one-wrench tight-
ening of hose kits and help reduce delays caused by
shipping damage.
Open Choices™ controls feature allows easy, low cost
integration with a Building control Automation System
of your choice.
Factory-installed lter rack saves time and expense to
eld-install a lter rack.
Factory-installed electric heat, desuperheater and ECM
motor options help you meet more specic application
requirements with minimum design or installation time
and expense.
Easy, low-cost maintenance
Easy access to the unit compressor (2-sides), fan sec-
tion (1-side), motor (1-side) and unit controls (front
access).
A removable orice ring allows the blower and motor
to be removed without removing the blower housing or
disconnecting the unit from the ductwork.
Quiet operation
Large fan wheel allows the fan motor to operate at
lower speed for quieter operation.
Two quiet compressor selections (depending on volt-
age and size variations) including rotary (sizes 007 to
015), and scroll compressors (sizes 019 to 070).
Superior Indoor Air Quality (IAQ)
Double-sloped, polymer drain pan promotes positive
condensate drainage.
Optional closed-cell foam insulation (no glass bers in
air stream).
Optional Hot Gas Reheat Coil provides superior
humidity control.
R-410A refrigerant with zero ozone depletion potential
or phase-out date
R-410A is classied as A1/A1 – lower toxicity, no
ame propagation – per ASHRAE Standard 31.
Exceeds ASHRAE 90.1 Minimum Efciencies
4 McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Vertical Floor-mounted Features & Options
I/O Expansion
Module
LED Annunciator
MicroTech III Unit
Controller
L
Communication
Module
BACnet
Communication
Module
onWorks
1. Electric Heat (Optional) – Integral electric heat coil provides
supplemental or emergency heat when conditions require.
2. Electronically Commutated Motor (ECM-Optional) - ECM motor
provides quiet, efcient operation while maintaining constant
over its static operating range. Factory programmed for
CFM
3-speeds.
3
. MicroTech® III Unit Controller – Designed for exibility, the
main
control board is used in standalone applications. An
optional I/O expansion module can be used to control electric
heat
and multiple fan speeds. A separate L
net®
communication module can be easily snapped onto the
onWorks® or BAC-
board to accommodate the building automation system of your
choice.
4. LED Annunciator
– External
LED status lights display fault
conditions to provide easy troubleshooting and diagnosis.
5. Compact Cabinet – The
standard unit is constructed of
unpainted G-60 galvanized steel, with the smallest possible
footprint. Optional painted cabinet is ideal for aesthetic requirements
6.Desuperheater (Optional) –
of residential applications.
Saves energy by producing domestic hot water using a small heat exchanger and water pump located
in the compressor compartment. Superheated refrigerant
gas from the compressor, which would otherwise be wasted,
is used to heat water. This reduces the amount of additional
energy required to heat water and it may eliminate the require
for separate water heating equipment.
ment
Desuperheater
Heat Exchanger and
Water Pump Piping Circuit
Optional – Hot Gas Reheat
Piping Circuit
7. Filter & Filter Rack – Units come standard with a 1" (25.4 mm)
thick throwaway lter mounted in a 4-sided combination lter
rack
and return air duct collar. This eliminates the added labor
and cost to eld-mount brackets. Filters can be easily removed
from
any side. A 2" lter rack is available as a factory-installed
selectable option to accept higher efciency lters
8.
Removable Access Panels – Two front panels provide easy
access to the blower motor and unit controls. Two rear panels
provide easy access to the fan housing and compressor section.
9. Piping Connections
– Water connections are FPT water t-
tings, ush with the outside of the cabinet for easy one-wrench
connection
to units. A large condensate connection provides
proper condensate removal.
10. Coaxial Heat Exchanger
– Designed
for maximum heat transfer
at normal and low water ow rates with minimum pressure
drop. The inside tube is deeply uted to enhance heat transfer
and
minimize fouling. A cupro-nickel heat exchanger is avail-
able
as a selectable option.
11. Hot Gas Reheat Coil (Optional) – Provides superior humidity
control by using expelled heat from the refrigeration cycle
and redirecting it through an isolated circuit in the evaporator
section. For every 10°F of temperature rise across the hot gas
reheat coil there is approximately a 20% drop in the discharge
air relative humidity (%Rh). A wall-mounted humidistat is
-
used in conjunction with the unit to measure and adjust the
humidity in the space.
Catalog 1103-2McQuay Ennity Water Source Heat Pumps5
Vertical Floor-mounted Features and Options
Flexible Congurations
Top View
Right Hand
Return
Air
Control Box
Cabinet
The Ennity Vertical Water Source Heat Pump is
factory assembled and tested for reliability. Five unique
cabinet sizes make up our 1/2 through 6 ton (1.8 through
21.2 kW) vertical heat pump product line. The consistent
shape makes layout simple. Water, condensate and
duct connections are all in similar locations to simplify
installation.
The fan section is separated from the compressor
section with an insulated divider panel for maximum sound
attenuation. A large removable panel provides easy service
access to the blower and motor.
The cabinet is constructed of unpainted, G-60
galvanized steel. The interiors of the top and side panels
and the bottom of the unit are covered with 1/2" thick
(13 mm), 1
standard. An optional closed cell insulation is available for
applications with more stringent IAQ requirements.
1
/2 lb. (681 g) density coated glass ber as
Cabinet Congurations
For maximum exibility, each vertical unit is available
in either a left-hand or right-hand return air arrangement to
provide the optimum piping location and service access.
The mirror image design of the units lets you congure
the system using minimum ductwork and piping. This helps
reduce design, material and installation costs.
Left Hand
Water
Connections
Filter Rack
The lter is supported by factory-mounted brackets that
allow for face removal. Units come standard with a 1" (25.4
mm) thick throwaway lter mounted in a combination lter
rack and return air duct collar, thus eliminating eld mounted
brackets. The lter can be removed from the right or left
side.
Optional factory-mounted or eld-installed 2" lter rack
kit for higher ltration requirements.
Optional 2" Filter Rack
Remove lter from
the left or right
side without a tool
Blower Housing
The blower housing protrudes through the cabinet top
allowing adequate material for connection to a exible
duct.
Fan Housing Protrudes Through the Cabinet Top for
Connection of Flexible Duct
6 McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Vertical Floor-mounted Features and Options
Electrical
The electrical components are located in the compressor
section of the unit. Separate holes are provided on the
cabinet to facilitate main power and low voltage control
wiring. All wiring connections are made internal to the
cabinet to reduce the risk of accidental contact. Each
unit is rated to accept time-delay fuses for branch circuit
overcurrent protection. Single phase units are also rated for
use with HACR circuit breakers.
The control box houses the major operating
electrical controls including the MicroTech III unit
controller, transformer, compressor relay and fan relay.
Each component can be accessed easily for service or
replacement.
Easy Access to the Vertical Unit Control Panel
Water Connections
The water and condensate connections are FPT ttings,
securely mounted ush to the corner post to allow for
connection to a exible hose without the use of a back-up
wrench. This helps reduce the time required to connect the
unit and helps prevent delays due to shipping damage. All
vertical units are internally trapped with clear vinyl tubing,
to allow inspection of condensate drain.
Flush FPT Water Fittings
Access panels lift
up and out easily
Vertical Unit Double-Sloped Drain Pan
Double Sloped Channels
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 7
Vertical Floor-mounted Features and Options
R-410A Refrigerant
R-410A refrigerant has zero ozone depletion potential,
no scheduled phase-out and is classied in ASHRAE
Standard 31 as A1/A1 – lower toxicity, no ame
propagation.
Compressors
Ennity water source heat pumps are designed around
the most advanced compressors in the industry. A wide
variety of compressor types are used to offer the best
system design for the dedicated refrigerants and tonnage.
This allows Ennity water source heat pumps to deliver
rated capacity with low noise levels.
Rotary compressor with R-410A is used in vertical units
size 007 to 015. R-410A, non-CFC refrigerant is used in
all unit sizes 007 to 070. Unit sizes 019 to 070 use a scroll
compressor.
Scroll Compressor
Rotary Compressor
Thermal Expansion Valve
All Ennity water source heat pump units include a
thermal expansion valve for refrigerant metering. The
Thermal Expansion Valve (TXV) allows the unit to operate
at optimum efciency with uid temperatures ranging from
30ºF to 110ºF, and entering air temperatures ranging from
40ºF to 90ºF. The TXV precisely meters the exact amount
of refrigerant ow through the system to meet the load and
deliver rated heating and cooling capacity.
Thermal Expansion Valve (TXV)
Reversing Valve
A 4-way reversing valve is included with all Ennity water source heat pumps. The valve is energized in
the heating mode and will “fail-safe” to the cooling mode
which is the predominant mode of operation for
commercial applications.
4-Way Reversing Valve
Fluid-to-Refrigerant Coil
The copper or cupronickel (optional) tube-in-tube
coaxial heat exchanger used in Ennity water source heat
pumps are designed for maximum heat transfer at normal
and low water ow rates with minimum pressure drop. The
inside tube is deeply uted to enhance heat transfer and
minimize fouling. All coaxial coils are tested to 400 psig on
the water side and 500 psig on the refrigerant side.
Geothermal range (VFW) units include coil and piping insulation to protect against condensation in low-temperature
geothermal applications.
Coaxial Heat Exchanger
8 McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Vertical Floor-mounted Features and Options
Noise Reduction
Ennity Water Source Heat Pumps include multiple
features and options to reduce unwanted noise generation
including scroll and rotary compression, viscoelastic acoustical mass plate, vibration isolated fan mounts, optional
compressor sound blankets and soft starting ECM motors.
While good design and installation practices are always
required to prevent objectionable noise, McQuay, as a
leader in engineered products can also provide many other
customized solutions to meet your applications
requirements.
Schrader Connections
Two 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.
Schrader Valve
to lock out compressor operation at extreme conditions.
For additional protection, unit sizes 015 and larger have a
7 psi (48 kPa) low-pressure switch to protect the compressor from low refrigerant charge. The low setting prevents
nuisance trips while providing additional protection.
Blower Section
The blower section includes the blower housing, wheel,
motor and drain pan. It is separated from the compressor
section by an insulated divider panel for maximum sound
attenuation. The large size of the blower wheel allows it
to rotate more slowly, reducing motor work to improve
efciency and provide for quiet operation. A large panel
provides service access to the blower and motor. All
blower/motor assemblies have a removable orice ring on
the housing to accommodate motor and blower removal
without disconnecting the unit from the ductwork.
Blower Motors
The standard blower motor is a multi-speed, Permanent
Split Capacitor (PSC) type with thermal overload protection. It is permanently lubricated. The motor is factory
wired to maximize performance and efciency. Unit sizes
019 and larger have a terminal strip on the motor for simple
motor speed change without going back to the control
box. The motor is isolated from the fan housing using
rubber isolators to minimize vibration transmission. All
blower/motor assemblies have a removable orice ring on
the housing to accommodate motor and blower removal
without disconnecting the unit from the ductwork. Optional
Electronically Commutated Motor (ECM) provides soft
start, maintains consistent CFM over its static operating
range and fan speed can be adjusted automatically based on
mode of operation.
High Efciency Blower Motor Options
Air-to-Refrigerant Coil
The air-to-refrigerant heat exchanger is a large face
area coil with copper tubes and aluminum ns. The ns are
lanced and mechanically bonded to the tubes using nned
edges on the inside which expand during assembly to
enhance heat transfer capabilities. The maximum working
pressure of the heat exchanger is 500 psig (3447 kPa). The
coil is designed for optimal performance in both heating
and cooling while maintaining the benet of a compact
size. Coils can be provided with an optional E-coating.
Electronically Commutated
Motor (ECM)
Refrigeration System
Units have a coaxial heat exchanger with a copper inner
tube and a steel outer tube. The air coil is a large face area
coil with copper tubes and aluminum ns. Safety controls
include a high-pressure switch and low-temperature sensor
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 9
Permanent Split Capacitor
Motor (PSC)
Control Options – Control Choices and Added Functionality
The control box is accessible through the left or right end
corner panel. It houses the major operating electrical controls
including the MicroTech® III unit controller, transformer,
compressor relay and fan relay. Each component is easily
accessed for service or replacement.
Four unique control choices are offered with the MicroTech III unit controller:
■ Standalone operation using a MicroTech III unit controller
■ MicroTech III unit controller with I/O Expansion module
■ MicroTech III unit controller with a Lonworks® commu-
nication module
■ MicroTech III unit controller 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 50 VA transformer.
Control Description Application Protocol
Uni t-mounte d
or wall-mounted
thermostat
MicroTech III
(Standalone)
Unit Controller
The MicroTech III unit controller is
a standalone microprocessor-based
control board conveniently located
in the unit control box for accessibil
. The board is designed to provide
ity
standalone control of a Water Source
Heat Pump using a wall thermostat
or a wall mounted temperature sen
or. Each unit controller is factory
s
programmed, wired, and tested. For
added functionality an optional I/O
expansion
MicroTech III controller for complete
control and operation of your McQuay
water source heat pump.
module interconnects to the
Each unit controller is factory programmed, wired,
and tested for complete control of single zone, standalone
operation of your McQuay Water Source Heat
Pump.
-
-
I/O Expansion
Module
LonWorks
Communication
Module
BACnet
Communication
Module
The I/O Expansion Module is an extens
ion of the Microtech III unit controller
and provides additional functionality to
the Microtech III control system. The
interconnect cable from the I/O expan-
module to the MicroTech III unit
sion
controller provides two-stage operation
of the water source heat pump.
The MicroTech III unit controller can
accept a plug-in LonWorks communication module to provide network
communications 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 unit controller
can accept a plug-in BACnet communication module to provide network
communications and added functionality 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.
Allows
for:
• Monitoring of entering water temperature for
boilerless electric heat control.
• Outputs for optional electric heat
• Output for multi-speed fans on a standard water
source heat pump.
• Independent LED annunciator to easily identify
operation fault conditions for two-stage units.
LonTalk application protocol is designed for units
that are integrated into a LonWorks communication
network for centralized scheduling and management
of multiple heat pumps.
-
Designed to be linked with a centralized building
automation system (BAS) through a BACnet com
munications
management of multiple heat pumps.
network for centralized scheduling and
Uni t-mounte d
or wall-mounted
thermostat
onMark 3.4
L
BaCnet
-
10 McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Control Features – MicroTech® III Control System
The MicroTech III Unit Controller is a microprocessorbased 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 pro-
vides all the necessary eld connections. The board can be
wired for 24-volt AC output to the wall thermostat by using
terminals R & C. An LED annunciator is located on the front
corner of the unit chassis to quickly check the operating status
of the unit.
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, the compressor
and fan will start 0 to 30 seconds later. When the load is
satised, the compressor and fan shut off.
■ Heating Mode – On a call for heating, the reversing valve
is energized after 60 seconds and the compressor and fan
start. When the load is satised, the compressor and fan
shut off. The reversing valve is de-energized 60 seconds
later.
■ Short Cycle Protection & Random Start – Each time
the compressor stops, a new random compressor start-
delay time between 180 and 240 seconds is generated.
This prevents compressor short cycling and prevents units
from starting simultaneously after coming back from an
unoccupied cycle.
■ 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.
■ 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 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 and an output is available to a “fault” LED at the
thermostat.
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 and an
output signal is made available for connection to a “fault”
LED at the thermostat.
■ Condensate Overow Protection – The
MicroTech III
unit 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 and output
is available to a “fault” LED at the thermostat. Heating
operation is not suspended.
■ Remote Reset of Automatic Lockouts – The Remote Re-
set feature provides the means to remotely reset automatic
lockouts generated by high-pressure and/or low-temperature faults. When the MicroTech III unit 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
unit controller receives separate input signals from the
refrigerant 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 and output is available to a “fault”
LED at the thermostat if either situation exists.
Note: Most unit fault conditions are the result of operating
the equipment outside the unit specications.
MicroTech III unit controller LED & fault outputs
Mode / Fault
Occupied, Bypass,
Standby
Override
Unoccupied On On Off Energized
Condensate Overow 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 “Ofine”
Received
1
Compressor relay/compressor terminal is labeled COMP, switched line of
the same electric input as any of the L1 terminals.
Status LED’
, or Tenant Off On Off Energized
Air or Low
1
ellow Green Red Output-Terminal “A”
Y
Off Off Flash De-energized
Off Flash Off De-energized
Off Flash Off De-energized
Flash Flash On De-energized
On On Off De-energized
On On On De-energized
Off Off Off De-energized
s
Thermostat Alarm Light
Catalog 1103-2McQuay Ennity Water Source Heat Pumps11
Control Features – I/O Expansion Module
I/O Expansion Module
The I/O Expansion Module is a factory installed option.
It is an extension of the MicroTech III unit controller and
provides extra functionality.
The I/O Expansion Module has 4 main purposes:
The Microtech III unit controller in combination with
the I/O Expansion Module will be the standard control
system for dual-circuit Water Source Heat Pump
equipment. For example: large vertical units.
The I/O Expansion Module has outputs to control
electric heat on a standard Water Source Heat Pump.
The I/O Expansion Module has outputs for multi-speed
fans on a standard Water Source Heat Pump.
The I/O Expansion Module has an independent LED
annunciator to identify operational fault conditions on
dual-circuit equipment.
I/O Expansion Module Conguration Jumper Settings
Jumper Description Options
JP1 Number of
JP2
Water Reheat Shorted to enable reheat
JP3 and JP4 open for no
supplemental heat
JP3 Supplemental JP3 open, JP4 shorted for
& JP4 Heat Type boilerless electric heat
JP3 and JP4 shorted is an
invalid setting
JP5 and JP6 open for single-speed fan
JP5
& JP6 Selection JP5 shorted and JP6 open for
two-speed fan
JP 5 and JP6 shorted is an
invalid setting
Occupied, Bypass,
Standby, or Tenant
Override Modes
Mode / Fault
Low Suction Temp #2 Fault Flash Off Off De-energized
Sensor Failures Low Suction
Low Suction
1
EWT (w/ Boilerless EH only)
2
Service Test Mode Enabled Flash Flash Flash De-energized
Normal Operation
Y
Temp #2, Flash Flash On De-energized
Off On Off De-energized
Status LED's
ellow Green Red
Flash Flash Off De-energized
Off Flash Flash N/A
Off On Off Energized
Terminal “A”
Thermostat Alarm
Light Output
Note: Mode / Faults are listed in order of priority.
1
Boilerless electric heat only
2
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.
Jumper Terminals
Features
Standard Heat Pumps / Single Circuit Units
Monitors entering water temperature for boilerless
electric heat control
Outputs for medium and high speed fan controls.
Second Circuit Units
High pressure switch
Low pressure switch
Low suction line temperature sensor
Compressor output
Reversing valve
12 McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Control Features – MicroTech III Controller with LonWorksModule
MicroTech III / unit control board LED & fault outputs
Mode / Fault
Occupied, Bypass,
Standby
Override
Unoccupied On On Off Energized
Condensate Overow On Off Off De-engergized
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 “Ofine”
Received
1
Compressor relay/compressor terminal is labeled COMP, switched line of
the same electric input as any of the L1 terminals.
Status LED’
, or Tenant Off On Off Energized
Air or Low
1
ellow Green Red Output-Terminal “A”
Y
Off Off Flash De-energized
Off Flash Off De-energized
Off Flash Off De-energized
Flash Flash On De-engergized
On On Off De-energized
On On On De-energized
Off Off Off De-enegized
MicroTech III Unit Controller with LonWorks®
Communication Module
Each McQuay water source heat pump can be equipped
with a LonWorks communication module that is LonMark
3.4 certied. The controller is microprocessor-based and is
designed to communicate over a LonWorks communica-
tions network. It can be factory or eld-installed.
The unit controller is programmed and tested with
all the logic required to monitor and control the unit. An
optional wall sensor may be used with the communication module to provide limited local control of the Water
Source Heat Pump. The unit 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.
s
Thermostat Alarm Light
MicroTech III Unit Controller with LonWorks
Communication Module orchestrates the following unit
operations:
Enable heating and cooling to maintain setpoint
based on a room sensor
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
The MicroTech III unit controller with communication
module includes:
A unit-mounted return air sensor*
A unit-mounted discharge air sensor*
A leaving water temperature sensor
* Discharge air and return air sensors must be
eld-installed per IM 956.
communication module provides access to
The
setpoints for operational control
Available wall sensors include:
Room sensor with LED status and tenant override
button
Room
sensor with LED status, tenant override
button, and ±3°F setpoint adjustment
Room
sensor with LED status, tenant override
button, 55° to 90°F setpoint adjustment
The MicroTech III unit controller with communication module includes a unit-mounted return air, discharge
air and leaving water temperature sensor. Wall mounted
temperature sensors include setpoint adjustment and tenant
override. The user has the capability of substituting the wall
sensor with a duct-mounted return air sensor.
Catalog 1103-2McQuay Ennity Water Source Heat Pumps13
Control Features – MicroTech III Controller with BACnet Module
MicroTech III Controller with BACnet
Communication Module
McQuay water source heat pumps are available with
McQuay BACnet MS/TP communication module that
is designed to communicate over a BACnet MS/TP
communications network to a building automation system
(BAS). It can be factory or eld-installed.
The unit controller is programmed and tested with all the
logic required to monitor and control the unit. An optional
wall sensor may be used with the communication module to
provide limited local control of the water source heat pump.
The unit 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.
The module makes operational data and commands
available on a communications network using BACnet
objects and properties:
The network cable is a shielded twisted-pair cable
Network communications run up to 76.8 Kbps
DIP switches on the controller enable the MS/TP MAC
address to be set in the range 0-127
Four green status LEDs on the communication module
indicate communication activity on the MS/TP communication network and with the unit controller
MicroTech III Unit Controller with BACnet MS/TP
Communication Module orchestrates the following
unit operations:
Enable heating and cooling to maintain setpoint
based on a room sensor
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
The MicroTech III unit controller with communication
module includes:
A unit-mounted return air sensor*
A unit-mounted discharge air sensor*
A leaving water temperature sensor
* Discharge air and return air sensors must be
eld-installed per IM 956.
communication module provides access to
The
setpoints for operational control
Available wall sensors include:
Figure 13. MicroTech III BACnet Water Source Heat Pump
Snap-in Communication Module
Room sensor with LED status and tenant override
button
Room
sensor with LED status, tenant override
button, and ±3°F setpoint adjustment
Room
sensor with LED status, tenant override
button, 55° to 90°F setpoint adjustment
14 McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Applications – Systems
Typical Cooling and Heating Refrigeration Cycles
Note: For standard heat pump operation only
Cooling Refrigeration Cycle
When the wall thermostat calls
for COOLING, the reversing valve
directs the ow of the refrigerant, a
hot gas, from the compressor to the
water-to-refrigerant 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. 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.
Heating Refrigeration Cycle
When the wall thermostat calls
for HEATING, the reversing valve
directs the ow of the refrigerant, a
hot gas, from the compressor to the
air-to-refrigerant heat exchanger coil.
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. 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
valve and back to the suction side of
the compressor to complete the cycle.
gas through the reversing
Air to
Refrigerant
Heat
Exchanger
Coil
Blower
Air to
Refrigerant
Heat
Exchanger
Coil
Blower
Return Air
Conditioned Air
(Cooling)
Return Air
Conditioned Air
(Heating)
Thermal
Expansion Valve
Reversing Valve
Thermal
Expansion Valve
Reversing Valve
Water to Refrigerant
Heat Exchanger
Water In
Water Out
Sensing
Bulb and
Capillary
Tube
Compressor
Water to Refrigerant
Heat Exchanger
Water In
Water Out
Sensing
Bulb and
Capillary
Tube
Compressor
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 15
Applications – Systems
Water source heat pump systems are one of the most ef-
cient, environmentally friendly systems available for heating
and cooling buildings. High-efciency, self contained units
(sizes 7,000 btuh to 420,000 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 specic 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 benets rang-
ing from low cost installation to the highest energy efciency
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 benet of an open loop system is the constant water
temperature, usually 50ºF to 60ºF, which provides efcient
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.
Open Loop Well Application
Boiler/Tower Application
16 McQuay Ennity Water Source Heat Pumps Catalog 1103-2
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 boreeld. 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 specically 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.
Vertical Loop Application
Horizontal Loop Application
“Surface Water” or “Lake” closed loop system is a
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 coils that are connected in the same manner
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 sufcient 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.
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 in installation procedures have improved the
assembly time of horizontal loops while keeping the rst
cost lower than a vertical loop.
Catalog 1103-2McQuay Ennity Water Source Heat Pumps17
Applications Considerations
Typical Vertical Installation
Unit Location
The VFC, VFW water source heat pump can be
installed “free standing” in an equipment room; however,
closet installations are more common for the small vertical
type units. Generally, the unit is located in the corner of a
closet with the non-ducted return air facing 90º to the door
and the major access panels facing the door as shown in
the illustration at right. Alternatively, the unit can have a
ducted return air with the opening facing the door and the
major access panels facing 90º to the door.
Locate a vertical unit to allow for easy removal of
the lter and access panels. Allow a minimum of 18" (46
cm) clearance on each side of the unit for service and
maintenance access. Always be sure to leave at least one
side of the lter rack unobstructed so that the service
personnel will be able to slide the lter out.
Install a eld supplied line voltage disconnect for
branch circuit protection.
To reduce noise emissions, install a eld-provided 1/2
inch thick, isolator pad below the entire base of the vertical
unit. The pad should be equal to the overall foot-print size
of the unit to provide sound dampening of the unit while in
operation.
A - Condensate
B- Desuperheater Water Return (Optional)
C
- Desuperheater Water Supply (Optional)
D
- Water Return
E
- Water Supply
F
- Low Voltage Control Wiring (Electric Entrance)
Right-Hand Return Air
Arrangement
Return
Air
Return Air Thru
Louvered Door
1. Discharge air
2. Acoustic thermal duct lining - 10 feet
3. Line voltage disconnect
4. Low voltage wiring to unit control box
5. Flexible duct collar
6. Louvered closet door
7. Condensate drain
8. Flexible, braided, stainless steel return hose with ow
controller/ball valve with port
9. Flexible, braided, stainless steel supply hose with Y-
strainer/ball valve with port
10. Access to unit control box
11. LED annunciator lights indicate unit operation status
and faults
12. Full vibration isolation pad between unit and oor
13. Minimum distance between return air duct collar and
wall for non-ducted return applications
• Size 007-012 – 5 inches
• Size 015-024 – 5 inches
• Size 030-036 – 6 inches
• Size 042-048 – 8 inches
• Size 060-070 – 10 inches
18 McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Applications Considerations
Ductwork and Attenuation
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 at the unit, a non-insulated transition
piece to the full duct size, a short run of duct, an elbow
without vanes, and a trunk duct teeing into a branch circuit
with discharge diffusers as illustrated below.
Return air ducts can be brought in through a wall grille
and then to the unit. The return duct system will normally
consist of a exible connector at the unit and a trunk duct to
the return air grille. With metal duct material, the return air
duct should be internally lined with acoustic insulation for
sound attenuation.
Return air ductwork to the unit requires the optional
return air duct collar/2" (51mm) lter rack kit.
Suggested Discharge Air Ducting
Trunk Duct
Square Elbow
(Both Sides
Internally Lined
With Acoustic
Insulation)
Branch Duct
Flexible
Duct Collar
Duct
Transition
(Internally Lined)
2 ft. x 2 ft. Diffuser
Discharge Collar
devices are commercially available and can be installed to
eliminate the need for memory stop shut off valves. Include
Pressure / Temperature ports to allow the service technician
to measure water ow and unit operation.
Control Access Panel
A - Condensate
B- Desuperheater Water Return (Optional)
C
- Desuperheater Water Supply (Optional)
D
- Water Return
E
- Water Supply
F
- Low Voltage Control Wiring (Electric Entrance)
G
- Line Voltage Unit Power (Electric Entrance)
McQuay has available optional hose kit combinations
to better facilitate system ow balancing. These exible
hoses reduce vibration between the unit and the rigid piping
system.
Fire Rated Supply or Return Hoses
Heat Pump
Piping
The water source heat pump unit is typically connected
to the supply / return piping using a “reverse return” piping
system which includes a ow control device so that ow
requirements are met for each zone. A short, high pressure
“exible hose” is used to connect the unit to the building’s
hard piping and acts as a sound attenuator for both the unit
operating noise and hydronic pumping noise. One end of
the hose has a swivel tting to facilitate removal of the
unit for replacement or service. Include supply and return
shutoff valves in the design to allow removal of a unit
without the need to shut down the entire heat pump system.
The return valve may be used for balancing and will
typically have a “memory stop” so that it can be reopened
to the proper position for the ow required. Fixed ow
Catalog 1103-2McQuay Ennity Water Source Heat Pumps19
Condensate Drain
The factory provided condensate drain trap on the
vertical unit is located inside the cabinet. Condensate
removal piping must be pitched away from the unit not
less than 1/4" per foot. A vent is required after the trap so
that the condensate will drain away from the unit. The vent
can also act as a clean out if the trap becomes clogged.
To avoid having waste gases entering the building, the
condensate drain should not be directly piped to a drain/
waste/vent stack. See local codes for the correct application
of condensate piping to drains.
Applications – Unit Selection
Achieving optimal performance with water source heat
pump systems requires both accurate system design and
proper equipment selection. Use a building load program to
determine the heating and cooling loads of each zone prior
to making equipment selections. With this information,
the McQuay SelectTools™ software selection program for
Water Source Heat Pumps can be used to provide fast, accurate and complete selections of all McQuay water source
heat pump products. SelectTools software is available by
contacting your local McQuay Representative.
While we recommend that you use McQuay SelectTools
software for all unit selections, manual selections can be
accomplished using the same zone load information and the
capacity tables available in this catalog.
Boiler / Tower Application Manual Selections:
The following example illustrates a typical selection for
a zone in a boiler/tower system for a commercial building.
A building load program determines that this zone needs
38,255 BTUH of total cooling, 31,832 BTUH of sensible
cooling and 36,988 BTUH of total heating. The water tem-
peratures for the boiler/tower system are 90ºF for cooling
and 70ºF for heating. The return air temperature is 80ºF dry
bulb with 67ºF wet bulb for cooling and 70ºF for heating.
Zone requirements:
Total Cooling Load = 38,255 BTUH
Sensible Cooling Load = 31,832 BTUH
Total Heating Load = 36,988 BTUH
Air Flow Required = 1510 CFM
Return Air Cooling = 80ºFDB/ 67ºFWB
Return Air - Heating = 70ºFDB
Since a McQuay Model VFC 036 produces approxi-
mately 36,000 BTUH of cooling, it is not sufcient for
this zone and a model VFC 042 should be considered.
Model VFC is chosen because it is specically designed
for a boiler/tower application. Typical water ow rates for
boiler/tower applications are 2.0 to 2.5 GPM per ton and in
this example no antifreeze is used.
Selection:
Model .............................VFC 042 (Boiler / Tower model)
Final Selection ....................................................VFC 042
Geothermal Applications:
The following example illustrates the same zone in a
geothermal application.
The load requirements for the zone are the same as the
above example – 38,255 BTUH of total cooling and 31,832
BTUH of sensible cooling and 36,988 BTUH of heating.
Geothermal loop software programs are available to help
determine the size of the loop eld based on:
Desired entering water temperatures for the system.
Specic acreage available for the loop which produces
specic min./max loop temps for the unit selection.
Entering water temperatures for geothermal systems can
be as high as 90º to 100ºF and as low as 30ºF based on the
geographical location of the building. Water ow rates are
typically 2.5 to 3 GPM per ton and the use of antifreeze is
required in most northern applications.
Zone requirements:
Total Cooling Load = 38,255 BTUH
Sensible Cooling Load = 31,832 BTUH
Total Heating Load = 36,988 BTUH
Air Flow Required = 1510 CFM
Return Air Cooling = 80 DB / 67 WB
Return Air - Heating = 70 DB
A McQuay Model VFW is chosen for this geothermal
application. Model VFW offers insulated water piping for
condensation considerations and a different freezestat setting to allow entering water temperatures lower than 40ºF
(with antifreeze). Output capacities should be recalculated
using the antifreeze reduction tables that are shown on page
49. The Model VFW 042 is rst considered but may not
meet the heating load because of the reduced entering water
temperatures (35ºF) and an antifreeze solution of 21 %
propylene (see page 49).
Selection:
Model ..................................VFW 042 (Geothermal model)
Total cooling capacity @ 100 EWT = 40,434 BTUH x
.980 = 39,625
Sensible cooling capacity @ 100 EWT = 32,164 BTUH x
.980 = 31,520
Total heating capacity @ 35 EWT = 38,335 BTUH x
.975 = 37,377 CFM = 1510 @ .6 ESP (Dry Coil)
Water Flow required to meet capacity = 10.8 GPM
Water Pressure drop = 12.7 x 1.5 = 14.61 (FT. H2O)
Final Selection ....................................................VFW 042
Note:
In applications where the zone may be a corner ofce or have
excessive glass area, the heating load could be greater than the
heating output capacity of the VFW 042 model (say 41,985 BTUH).
The choices are to upsize the unit to the next model available (048),
or add an electric duct heater to supplement the output of the 042
unit.
20McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Ennity Vertical ISO Performance Data – Water Loop
Water Loop Performance Data – Rated in Accordance with ISO Standard 13256-1 Boiler/Tower
Standard Unit ECM at High Static
*007
009
012
042
* Not available at time of publication. Please consult your McQuay Representative for specific availability
n/a = ECM not available in unit sizes 007, 009, 012.
Notes:
EER = Energy Efciency Ratio COP = Coefcient of Performance L/s = Liters per second
Cooling capacity is based on 80.6°F db, 66.2°F wb (27/19°C) entering air temperature and 86°F (30°C) entering water temperature.
Heating capacity is based on 68°F (20°C) entering air temperature and 68°F (20°C) entering water temperature.
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 21
Ennity Vertical ISO Performance Data – Ground Loop
Ground Loop Performance Data Rated in Accordance with ISO Standard 13256-1 Ground Coupled
Standard Unit ECM at High Static
*007
009
012
* Not available at time of publication. Please consult your McQuay Representative for specific availability
n/a = ECM not available in unit sizes 007, 009, 012.
Notes:
EER = Energy Efciency Ratio COP = Coefcient of Performance L/S = Liters per second
Cooling capacity is based on 80.6°F db, 66.2°F wb (27/19°C) entering air temperature and 77°F (25°C) entering water temperature.
Heating capacity is based on 68°F (20°C) entering air temperature and 32°F (0°C) entering water temperature.
22McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Ennity Vertical ISO Performance Data – Ground Water
Ground Water Performance Data Rated in Accordance with ISO Standard 13256-1.
Standard Unit ECM at High Static
*007
009
012
* Not available at time of publication. Please consult your McQuay Representative for specific availability
n/a = ECM not available in unit sizes 007, 009, 012.
Notes:
EER = Energy Efciency Ratio COP = Coefcient of Performance L/S = Liters per second
Cooling capacity is based on 80.6°F db, 66.2°F wb (27/19°C) entering air temperature and 59°F (15°C) entering water temperature.
Heating capacity is based on 68°F (20°C) entering air temperature and 50°F (10°C) entering water temperature.
Capacity Tables Notes:
EWT = Entering Water Temperature (ºF) L/sec. = Airow in Liters per second WPD = Water Pressure Drop (Ft. Hd) EA = Entering Air Temperature (ºF)
LWT = Leaving Water Temperature (ºF) TOT = Total Heat (Btu) SEN = Sensible Heat (Btu) kW = Kilowatts
COP = Coefcient of Performance THA = Total Heat of Absorption (Btu) THR = Total Heat of Rejection (Btu) GPM = Gallons Per Minute
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 23
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 45
Vertical Performance Data – Operating Limits
Air Limits - °F (English units)
Standard Range Geothermal RangeUnits Units
Cooling Heating Cooling Heating
Min. Ambient Air 50ºF 50ºF 40ºF 40ºF
Normal Ambient Air 80ºF
Max Ambient Air 100ºF
Min. Entering Air
Normal Entering Air db/wb 80/67ºF
Max Entering Air db/wb
1,2
50ºF 50ºF 50ºF 40ºF
1,2
100/83ºF 80ºF 100/83ºF 80ºF
70ºF 80ºF 70ºF
85ºF 100ºF 85ºF
70ºF 80/67ºF 70ºF
Air Limits - °C (SI units)
Standard Range Geothermal Range
Units Units
Cooling Heating Cooling Heating
Min. Ambient Air 10ºC 10ºC 5ºC 5ºC
Normal Ambient Air 27ºC 21ºC 27ºC 21ºC
Max Ambient Air 38ºC 29ºC 38ºC 29ºC
Min. Entering Air
Normal Entering Air db/wb 27/19ºC 21ºC 27/19ºC 21ºC
Max Entering Air db/wb
1,2
10ºC 10ºC 10ºC 5ºC
1,2
38/28ºC 27ºC 38/28ºC 27ºC
Water - °F (English units)
Standard Range Geothermal Range
Units Units
Cooling Heating Cooling Heating
Min. Entering Water
Normal Entering Water 85ºF 70ºF 77ºF 40ºF
Max Entering Water 110ºF 90ºF 110ºF 90ºF
1,2
55ºF 55ºF 30ºF 20ºF
Environment
This equipment is designed for indoor installation only.
Sheltered locations such as attics, garages, etc., generally
will not provide sufcient protection against extremes in
temperature and/or humidity, and equipment performance,
reliability, and service life may be adversely affected.
Power supply
A voltage variation of +/-10% of nameplate voltage is
acceptable. Three-phase system imbalance shall not exceed
2%.
Additional information for initial
start-up only
Standard range units:
Units are designed to start in an ambient of 50ºF (10ºC),
with entering air at 50ºF (10ºC), with entering water at 70ºF
(21ºC), with both air and water at the ow rates used in the
ISO 13256-1 rating test, for initial start-up in winter.
Note: This is not a normal or continuous operating
condition. It is assumed that such a start-up is for
the purpose of bringing the building space up to
occupancy temperature.
Water - °C (SI units)
Standard Range Geothermal Range
Units Units
Cooling Heating Cooling Heating
Min. Entering... Water
Normal Entering Water 29ºC Max Entering Water 43ºC
1 At ARI ow rate
2 Maximum and minimum values may not be combined. If one value is
at maximum or minimum, the other two conditions may not exceed the
normal condition for standard units. Extended range units may combine
any two maximum conditions, but not more than two, with all other
conditions being normal conditions.
1,2
13ºC 13ºC -1ºC -6ºC
21ºC 25ºC 4ºC
32ºC 43ºC 32ºC
Geothermal range units:
Geothermal range heat pump conditioners are designed
to start in an ambient of 40ºF (5ºC), with entering air at
40ºF (5ºC), with entering water at 40ºF (5ºC), with both air
and water at the ow rates used in the ISO 13256-1 rating
test, for initial start-up in winter.
Note: This is not a normal or continuous operating
condition. It is assumed that such a start-up is for
the purpose of bringing the building space up to
occupancy temperature.
46 McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 47
Electrical Data – VFC, VFW 007 - 070
Unit Without Options
Unit Size Voltage/Hz/Phase
*007
115-60-1
208/230-60-1
265-60-1
009
115-60-1
208/230-60-1
265-60-1
012
115-60-1
208/230-60-1
265-60-1
015
019
024
030
036
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-3
208/230-60-1
208/230-60-3
460-60-3
042
208/230-60-1
208/230-60-3
460-60-3
575-60-3
208/230-60-1
048
208/230-60-3
265-60-1
460-60-3
575-60-3
060
070
*Unit size 007 not available at time of publication. Please consult your McQuay Representative for specific availability.
208/230-60-1
208/230-60-3
265-60-1
460-60-3
575-60-3
208/230-60-3
460-60-3
575-60-3
Compressor
RLA
*
*
*
8.3
4.1
2.7
9.9
4.9
4.2
5.9
3.9
9.0
7.1
13.5
9.0
14.1
11.2
8.9
17.9
13.2
6.0
19.9
13.6
6.1
4.2
21.8
13.7
16.3
6.2
4.8
26.3
15.6
19.9
7.8
5.8
22.4
10.6
7.7
LRA
50.0
22.0
22.0
50.0
25.0
22.0
29.0
28.0
48.0
43.0
58.3
54.0
73.0
60.0
58.0
112.0
88.0
44.0
109.0
83.1
41.0
33.0
117.0
83.1
98.0
41.0
33.0
134.0
110.0
128.0
52.0
38.9
149.0
75.0
54.0
Total Unit
PSC Fan
Motor FLA FLA Amps HACR Breaker Size
*
*
*
*
*
*
1.88
0.83
0.65
1.88
0.83
0.65
1.20
0.90
1.20
0.90
1.20
0.90
3.50
2.80
3.50
3.50
3.50
1.60
4.29
4.29
1.60
1.30
4.29
4.29
5.30
1.60
1.30
4.29
4.29
5.30
1.60
1.30
4.29
1.60
1.30
10.2
4.9
3.3
11.8
5.8
4.8
7.1
4.8
10.2
8.0
14.7
9.9
17.6
14.0
12.4
21.4
16.7
7.6
24.2
17.9
7.7
5.5
26.1
18.0
21.6
7.8
6.1
30.6
19.9
25.2
9.4
7.1
26.7
12.2
9.0
Min. Voltage
*
*
*
Min. Circuit
*
*
*
108
197
240
108
197
240
197
240
197
240
197
240
197
240
197
197
197
416
197
197
416
520
197
197
240
416
520
197
197
240
416
520
197
416
520
Max. Fuse or
*
*
*
12.3
6.0
4.0
14.3
7.0
5.9
8.6
5.8
12.5
9.8
18.1
12.2
21.1
16.8
14.6
25.9
20.0
9.1
29.1
21.3
9.2
6.6
31.5
21.4
25.7
9.4
7.3
37.1
23.8
30.1
11.4
8.6
32.3
14.9
10.9
*
*
*
20.0
15.0
15.0
20.0
15.0
15.0
15.0
15.0
20.0
15.0
30.0
20.0
35.0
25.0
20.0
40.0
30.0
15.0
45.0
30.0
15.0
15.0
50.0
35.0
35.0
15.0
15.0
60.0
35.0
40.0
15.0
15.0
50.0
20.0
15.0
48McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Electrical Data – VFC, VFW 007 - 070
Unit With Desuperheater
Unit Size
007
009
012
015
019
024
Voltage/Hz/Phase
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
030
265-60-1
208/230-60-3
208/230-60-1
036
208/230-60-3
460-60-3
042
208/230-60-1
208/230-60-3
460-60-3
575-60-3
208/230-60-1
208/230-60-3
048
265-60-1
460-60-3
575-60-3
208/230-60-1
208/230-60-3
060
265-60-1
460-60-3
575-60-3
070
n/a = Desuperheater option not available for unit sizes 007, 009, 012 & 015.
208/230-60-3
460-60-3
575-60-3
Compressor
RLA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
9.0
-
13.5
-
14.1
-
8.9
17.9
13.2
-
19.9
13.6
-
-
21.8
13.7
-
-
-
26.3
15.6
-
-
-
22.4
-
-
LRA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
48.0
58.3
73.0
58.0
112.0
88.0
109.0
83.1
117.0
83.1
134.0
110.0
149.0
Desuperheater Total Unit
PSC Fan
Motor FLA Pump FLA FLA Amps
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
1.20
-
-
1.20
-
-
3.50
-
-
3.50
3.50
3.50
-
-
4.29
4.29
-
-
-
-
4.29
4.29
-
-
-
-
-
-
4.29
4.29
-
-
-
-
-
-
4.29
-
-
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
0.40
-
0.40
-
0.40
-
0.40
0.40
0.40
-
0.40
0.40
-
-
0.40
0.40
-
-
-
0.40
0.40
-
-
-
0.40
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
10.6
-
15.1
-
18.0
-
12.8
21.8
17.1
-
24.6
18.3
-
-
26.5
18.4
-
-
-
31.0
20.3
-
-
-
27.1
-
-
Min. Voltage
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
197
-
197
-
197
-
197
197
197
-
197
197
-
-
197
197
-
-
-
197
197
-
-
-
197
-
-
Min. Circuit Max. Fuse or
HACR Breaker Size
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
12.8
-
18.4
-
21.5
-
15.0
26.3
20.4
-
29.5
21.7
-
-
31.9
21.8
-
-
-
37.5
24.2
-
-
-
32.7
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
20.0
-
30.0
-
35.0
-
20.0
40.0
30.0
-
45.0
35.0
-
-
50.0
35.0
-
-
-
60.0
35.0
-
-
-
50.0
-
-
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 49
Electrical Data – VFC, VFW 007 - 070
Unit With ECM
Unit Size Voltage/Hz/Phase
007
009
012
015
019
024
030
036
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-3
208/230-60-1
208/230-60-3
460-60-3
042
208/230-60-1
208/230-60-3
460-60-3
575-60-3
048
060
070
* Not available at time of publication. Please consult your McQuay Representative for specific availability
n/a = ECM not available in unit sizes 007, 009, 012.
208/230-60-1
208/230-60-3
265-60-1
460-60-3
575-60-3
208/230-60-1
208/230-60-3
265-60-1
460-60-3
575-60-3
208/230-60-3
460-60-3
575-60-3
Compressor
RLA
n/a
n/a
n/a
n/a
n/a
n/a
*
*
9.0
7.1
13.5
9.0
14.1
11.2
8.9
17.9
13.2
6.0
19.9
13.6
6.1
-
21.8
13.7
16.3
6.2
-
26.3
15.6
19.9
7.8
-
22.4
10.6
-
LRA
n/a
n/a
n/a
n/a
n/a
n/a
48.0
43.0
58.3
54.0
73.0
60.0
58.0
112.0
88.0
44.0
109.0
83.1
41.0
117.0
83.1
98.0
41.0
134.0
110.0
128.0
52.0
149.0
75.0
Total Unit
ECM Fan
Motor FLA FLA Amps HACR Breaker Sizen/
n/a
n/a
n/a
n/a
n/a
n/a
*
*
*
*
2.80
2.40
2.80
2.40
4.30
4.10
4.30
4.30
4.30
4.10
6.80
6.80
5.50
-
-
6.80
6.80
5.50
5.50
-
-
9.10
9.10
6.90
6.90
-
-
9.10
6.90
-
-
n/a
n/a
n/a
n/a
n/a
n/a
11.8
9.5
16.3
11.4
18.4
15.3
13.2
22.2
17.5
10.1
26.7
20.4
11.6
28.6
20.5
21.8
11.7
35.4
24.7
26.8
14.7
31.5
17.5
Min. Voltage
*
*
-
-
-
-
n/a
n/a
n/a
n/a
n/a
n/a
*
*
197
240
197
240
197
240
197
197
197
416
197
197
416
-
197
197
240
416
-
197
197
240
416
-
197
416
-
Min. Circuit
n/a
n/a
n/a
n/a
n/a
n/a
*
*
14.0
11.2
19.6
13.6
21.9
18.1
15.4
26.7
20.8
11.6
31.6
23.8
13.1
-
34.0
23.9
25.9
13.3
-
42.0
28.7
31.7
16.6
-
37.1
20.1
-
Max. Fuse or
n/a
n/a
n/a
n/a
n/a
n/a
*
*
20.0
15.0
30.0
20.0
35.0
25.0
20.0
40.0
30.0
15.0
50.0
35.0
15.0
50.0
35.0
40.0
15.0
-
60.0
40.0
50.0
20.0
-
50.0
30.0
-
50McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Electrical Data – VFC, VFW 007 - 070
Unit With Desuperheater and ECM
Unit Size
007
009
012
015
019
024
030
036
Voltage/Hz/Phase
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-3
208/230-60-1
208/230-60-3
460-60-3
042
208/230-60-1
208/230-60-3
460-60-3
575-60-3
048
208/230-60-1
208/230-60-3
265-60-1
460-60-3
575-60-3
208/230-60-1
060
070
* Not available at time of publication. Please consult your McQuay Representative for specific availability
n/a = ECM not available in unit sizes 007, 009, 012.
208/230-60-3
265-60-1
460-60-3
575-60-3
208/230-60-3
460-60-3
575-60-3
Compressor
RLA
n/a
n/a
n/a
n/a
n/a
n/a
*
*
9.0
-
13.5
-
14.1
-
8.9
17.9
13.2
-
19.9
13.6
-
-
21.8
13.7
-
-
-
26.3
15.6
-
-
-
22.4
-
-
LRA
n/a
n/a
n/a
n/a
n/a
n/a
48.0
58.3
73.0
58.0
112.0
88.0
109.0
83.1
117.0
83.1
134.0
110.0
149.0
Desuperheater Total Unit
ECM Fan
Motor FLA Pump FLA FLA Amps
n/a
n/a
n/a
n/a
n/a
n/a
*
*
*
*
2.80
-
-
2.80
-
-
4.30
-
-
4.30
4.30
4.30
-
-
6.80
6.80
-
-
-
-
6.80
6.80
-
-
-
-
-
-
9.10
9.10
-
-
-
-
-
-
9.10
-
-
-
-
n/a
n/a
n/a
n/a
n/a
n/a
*
*
0.40
-
0.40
-
0.40
0.40
0.40
0.40
-
0.40
0.40
-
-
0.40
0.40
-
-
-
0.40
0.40
-
-
-
0.40
-
-
n/a
n/a
n/a
n/a
n/a
n/a
*
*
12.2
-
16.7
-
18.8
-
13.6
22.6
17.9
-
27.1
20.8
-
-
29.0
20.9
-
-
-
35.8
25.1
-
-
-
31.9
-
-
Min. Voltage
n/a
n/a
n/a
n/a
n/a
n/a
*
*
197
-
197
-
197
-
197
197
197
-
197
197
-
-
197
197
-
-
-
197
197
-
-
-
197
-
-
Min. Circuit Max. Fuse or
HACR Breaker Size
n/a
n/a
n/a
n/a
n/a
n/a
*
*
14.4
-
20.0
-
22.3
-
15.8
27.1
21.2
-
32.0
24.2
-
-
34.4
24.3
-
-
-
42.4
29.1
-
-
-
37.5
-
-
n/a
n/a
n/a
n/a
n/a
n/a
*
*
20.0
-
30.0
-
35.0
-
20.0
45.0
30.0
-
50.0
35.0
-
-
50.0
35.0
-
-
-
60.0
40.0
-
-
-
50.0
-
-
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 51
Electrical Data – VFC, VFW 007 - 070
Unit with 10kW Electric Heat Coil
Unit Size
007
009
012
015
019
024
030
036
Voltage/Hz/Phase
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-3
208/230-60-1
208/230-60-3
460-60-3
042
208/230-60-1
208/230-60-3
460-60-3
575-60-3
048
208/230-60-1
208/230-60-3
265-60-1
460-60-3
060
070
575-60-3
208/230-60-1
208/230-60-3
265-60-1
460-60-3
575-60-3
208/230-60-3
460-60-3
575-60-3
Compressor
RLA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
9.0
7.1
13.5
9.0
14.1
11.2
8.9
17.9
13.2
6.0
19.9
13.6
6.1
4.2
21.8
13.7
-
6.2
4.8
26.3
15.6
-
7.8
5.8
22.4
10.6
7.7
LRA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
48.0
43.0
58.3
54.0
73.0
60.0
58.0
112.0
88.0
44.0
109.0
83.1
41.0
33.0
117.0
83.1
41.0
33.0
134.0
110.0
52.0
38.9
149.0
75.0
54.0
Electric Heater Total Unit
PSC Fan
Motor FLA RLA FLA Amps
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
1.20
0.90
1.20
0.90
3.50
2.80
3.50
3.50
3.50
1.60
4.29
4.29
1.60
1.30
4.29
4.29
-
-
1.60
1.30
4.29
4.29
-
-
1.60
1.30
4.29
1.60
1.30
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
40.0
34.7
40.0
34.7
40.0
34.7
23.1
40.0
23.1
11.6
41.7
24.1
12.0
9.6
41.7
24.1
-
12.0
9.6
41.7
24.1
-
12.0
9.6
24.1
12.0
9.6
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
50.2
42.7
54.7
44.6
57.6
48.7
35.5
61.4
39.8
19.2
65.9
42.0
18.1
13.8
67.8
42.1
-
18.2
14.4
72.3
44.0
-
19.8
15.4
50.8
22.6
17.3
Min. Voltage
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
197
240
197
240
197
240
197
197
197
416
197
197
416
520
197
197
-
416
520
197
197
-
416
520
197
416
520
Min. Circuit Max. Fuse or
HACR Breaker Size
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
62.4
53.1
68.0
55.5
71.1
60.2
43.5
75.9
48.9
23.6
81.3
51.4
22.6
17.2
83.7
51.6
-
22.8
18.0
89.3
54.0
-
24.7
19.3
62.5
28.2
21.6
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
60.0
50.0
70.0
50.0
70.0
60.0
45.0
80.0
50.0
25.0
90.0
50.0
25.0
15.0
90.0
50.0
-
25.0
20.0
100.0
60.0
-
25.0
20.0
70.0
35.0
25.0
n/a = Electric Heat not available in unit sizes 007, 009, 012, 015.
52McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Electrical Data – VFC, VFW 007 - 070
Unit with 5kW Electric Heat Coil
Unit Size
*007
009
012
015
019
024
030
036
Voltage/Hz/Phase
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-3
208/230-60-1
208/230-60-3
460-60-3
Compressor
RLA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
9.0
7.1
13.5
9.0
14.1
11.2
8.9
17.9
13.2
-
LRA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
48.0
43.0
58.3
54.0
73.0
60.0
58.0
112.0
88.0
Electric Heater Total Unit
PSC Fan
Motor FLA RLA FLA Amps
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
1.20
0.90
1.20
0.90
3.50
2.80
3.50
3.50
3.50
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
22.5
19.5
22.5
19.5
22.5
19.5
22.5
22.5
22.5
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
32.7
27.5
37.2
29.4
40.1
33.5
34.9
43.9
39.2
-
Min. Voltage
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
197
240
197
240
197
240
197
197
197
-
Min. Circuit Max. Fuse or
HACR Breaker Size
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
40.5
34.1
46.2
36.5
49.3
41.2
42.8
54.1
48.1
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
40.0
35.0
50.0
40.0
50.0
45.0
45.0
60.0
50.0
-
n/a = Electric Heat not available in unit sizes 007, 009, 012, 015.
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 53
Electrical Data – VFC, VFW 007 - 070
Unit with ECM and 10kW Electric Heat Coil
Unit Size
007
009
012
015
019
024
030
036
Voltage/Hz/Phase
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-3
208/230-60-1
208/230-60-3
460-60-3
042
208/230-60-1
208/230-60-3
460-60-3
575-60-3
208/230-60-1
048
208/230-60-3
265-60-1
460-60-3
575-60-3
208/230-60-1
060
070
208/230-60-3
265-60-1
460-60-3
575-60-3
208/230-60-3
460-60-3
575-60-3
Compressor
RLA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
9.0
7.1
13.5
9.0
14.1
11.2
8.9
17.9
13.2
6.0
19.9
13.6
6.1
-
21.8
13.7
-
6.2
-
26.3
15.6
-
7.8
-
22.4
10.6
-
LRA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
48.0
43.0
58.3
54.0
73.0
60.0
58.0
112.0
88.0
44.0
109.0
83.1
41.0
117.0
83.1
41.0
134.0
110.0
52.0
149.0
75.0
Electric Heater Total Unit
ECM Fan
Motor FLA RLA FLA Amps
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
2.80
2.40
2.80
2.40
4.30
4.10
4.30
4.30
4.30
4.10
6.80
6.80
5.50
-
-
6.80
6.80
-
-
5.50
-
-
9.10
9.10
-
-
6.90
-
-
9.10
6.90
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
40.0
34.7
40.0
34.7
40.0
34.7
23.1
40.0
23.1
11.6
41.7
24.1
12.0
-
41.7
24.1
-
12.0
-
41.7
24.1
-
12.0
-
24.1
12.0
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
51.8
44.2
56.3
46.1
58.4
50.0
36.3
62.2
40.6
21.7
68.4
44.5
23.6
-
70.3
44.6
-
23.7
-
77.1
48.8
-
26.7
-
55.6
29.5
-
Min. Voltage
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
197
240
197
240
197
197
240
197
197
416
197
197
416
-
197
197
-
416
-
197
197
-
416
-
197
416
-
Min. Circuit Max. Fuse or
HACR Breaker Size
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
64.0
54.6
69.6
57.0
71.9
61.5
44.3
76.7
49.7
26.1
83.8
53.9
28.1
-
86.2
54.1
-
28.3
-
94.1
58.8
-
31.6
-
67.3
35.1
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
60.0
50.0
70.0
50.0
70.0
60.0
45.0
80.0
50.0
25.0
90.0
60.0
30.0
-
90.0
60.0
-
30.0
-
100.0
60.0
-
35.0
-
80.0
40.0
-
n/a = Electric Heat not available in unit sizes 007, 009, 012, 015.
54McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Electrical Data – VFC, VFW 007 - 070
Unit with ECM and 5kW Electric Heat Coil
Unit Size
007
009
012
015
019
024
030
036
Voltage/Hz/Phase
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-3
208/230-60-1
208/230-60-3
460-60-3
Compressor
RLA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
9.0
7.1
13.5
9.0
14.1
11.2
8.9
17.9
13.2
-
LRA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
48.0
43.0
58.3
54.0
73.0
60.0
58.0
112.0
88.0
Electric Heater Total Unit
ECM Fan
Motor FLA RLA FLA Amps
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
2.80
2.40
2.80
2.40
4.30
4.10
4.30
4.30
4.30
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
22.5
19.5
22.5
19.5
22.5
19.5
22.5
22.5
22.5
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
34.3
29.0
38.8
30.9
40.9
34.8
35.7
44.7
40.0
-
Min. Voltage
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
197
240
197
240
197
240
197
197
197
-
Min. Circuit Max. Fuse or
HACR Breaker Size
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
42.1
35.6
47.8
38.0
50.1
42.5
43.6
54.9
48.9
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
45.0
35.0
50.0
40.0
50.0
45.0
45.0
60.0
50.0
-
n/a = Electric Heat not available in unit sizes 007, 009, 012, 015.
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 55
Electrical Data – VFC, VFW 007 - 070
Unit with Desuperheater and 10kW Electric Heat Coil
Unit Size
007
009
012
015
019
024
030
036
208/230-60-1
208/230-60-1
208/230-60-1
208/230-60-1
208/230-60-1
208/230-60-1
208/230-60-1
208/230-60-3
208/230-60-1
208/230-60-3
Voltage/Hz/Phase
265-60-1
265-60-1
265-60-1
265-60-1
265-60-1
265-60-1
265-60-1
460-60-3
042
208/230-60-1
208/230-60-3
460-60-3
575-60-3
208/230-60-1
048
208/230-60-3
265-60-1
460-60-3
575-60-3
208/230-60-1
060
070
n/a = Electric Heat not available in unit sizes 007, 009, 012, 015.
208/230-60-3
265-60-1
460-60-3
575-60-3
208/230-60-3
460-60-3
575-60-3
Compressor
RLA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
9.0
-
13.5
-
14.1
-
8.9
17.9
13.2
-
19.9
13.6
-
-
21.8
13.7
-
-
-
26.3
15.6
-
-
-
22.4
-
-
LRA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
48.0
58.3
73.0
58.0
112.0
88.0
109.0
83.1
117.0
83.1
134.0
110.0
149.0
Desuperheater Electric Total Unit
PSC Fan
Motor FLA Pump FLA Heater RLA FLA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
1.2
-
-
1.2
-
-
3.5
-
-
3.5
3.5
3.5
-
-
4.29
4.29
-
-
-
-
4.29
4.29
-
-
-
-
-
-
4.29
4.29
-
-
-
-
-
-
4.29
-
-
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
0.4
-
0.4
-
0.4
-
0.4
0.4
0.4
-
0.4
0.4
-
-
0.4
0.4
-
-
-
0.4
0.4
-
-
-
0.4
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
40.0
-
40.0
-
40.0
-
23.1
40.0
23.1
-
41.7
24.1
-
-
41.7
24.1
-
-
-
41.7
24.1
-
-
-
24.1
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
50.6
-
55.1
-
58.0
-
35.9
61.8
40.2
-
66.3
42.4
-
-
68.2
42.5
-
-
-
72.7
44.4
-
-
-
51.2
-
-
Min. Voltage
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
197
197
197
197
197
197
197
197
197
197
197
197
197
Min. Circuit Max. Fuse or
Amps HACR Breaker Size
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
62.8
-
-
68.4
-
-
71.5
-
-
43.9
76.3
49.3
-
-
81.7
51.8
-
-
-
-
84.1
52.0
-
-
-
-
-
-
89.7
54.4
-
-
-
-
-
-
62.9
-
-
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
60.0
-
70.0
-
70.0
-
45.0
80.0
50.0
-
90.0
50.0
-
-
90.0
50.0
-
-
-
100.0
60.0
-
-
-
70.0
-
-
56McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Electrical Data – VFC, VFW 007 - 070
Unit with Desuperheater and 5kW Electric Heat Coil
Unit Size Voltage/Hz/Phase
007
009
012
015
019
024
030
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-3
036
n/a = Electric Heat not available in unit sizes 007, 009, 012, 015.
208/230-60-1
208/230-60-3
460-60-3
Compressor
RLA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
9.0
-
13.5
-
14.1
-
8.9
17.9
13.2
-
LRA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
48.0
-
58.3
-
73.0
-
58.0
112.0
88.0
-
Desuperheater Electric Total Unit
PSC Fan
Motor FLA Pump FLA Heater RLA FLA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
1.20
-
1.20
-
3.50
-
3.50
3.50
3.50
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
0.4
-
0.4
-
0.4
-
0.4
0.4
0.4
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
22.5
-
22.5
-
22.5
-
22.5
22.5
22.5
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
33.1
-
37.6
-
40.5
-
35.3
44.3
39.6
-
Min. Voltage
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
197
197
197
197
197
197
Min. Circuit Max. Fuse or
Amps HACR Breaker Size
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
40.9
-
-
46.6
-
-
49.7
-
-
43.2
54.5
48.5
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
40.0
-
50.0
-
50.0
-
45.0
60.0
50.0
-
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 57
Electrical Data – VFC, VFW 007 - 070
Unit with Desuperheater, ECM and 10kW Electric Heat Coil
Unit Size Voltage/Hz/Phase
007
009
012
015
019
024
030
036
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-3
208/230-60-1
208/230-60-3
460-60-3
042
208/230-60-1
208/230-60-3
460-60-3
575-60-3
048
208/230-60-1
208/230-60-3
265-60-1
460-60-3
575-60-3
208/230-60-1
060
070
n/a = Electric Heat not available in unit sizes 007, 009, 012, 015.
208/230-60-3
265-60-1
460-60-3
575-60-3
208/230-60-3
460-60-3
575-60-3
Compressor
RLA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
9.0
-
13.5
-
14.1
-
8.9
17.9
13.2
-
19.9
13.6
-
-
21.8
13.7
-
-
-
26.3
15.6
-
-
-
22.4
-
-
LRA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
48.0
-
58.3
-
73.0
-
58.0
112.0
88.0
-
109.0
83.1
-
-
117.0
83.1
-
-
-
134.0
110.0
-
-
-
149.0
-
-
Desuperheater Electric Total Unit
ECM Fan
Motor FLA Pump FLA Heater RLA FLA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
2.80
-
2.80
-
4.30
-
4.30
4.30
4.30
-
6.80
6.80
-
-
6.80
6.80
-
-
-
9.10
9.10
-
-
-
9.10
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
0.4
-
0.4
-
0.4
-
0.4
0.4
0.4
-
0.4
0.4
-
-
0.4
0.4
-
-
-
0.4
0.4
-
-
-
0.4
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
40.0
-
40.0
-
40.0
-
23.1
40.0
23.1
-
41.7
24.1
-
-
41.7
24.1
-
-
-
41.7
24.1
-
-
-
24.1
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
52.2
-
56.7
-
58.8
-
36.7
62.6
41.0
-
68.8
44.9
-
-
70.7
45.0
-
-
-
77.5
49.2
-
-
-
56.0
-
-
Min. Voltage
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
197
197
197
197
197
197
197
197
197
197
197
197
197
Min. Circuit Max. Fuse or
Amps HACR Breaker Size
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
64.4
-
-
70.0
-
-
72.3
-
-
44.7
77.1
50.1
-
-
84.2
54.3
-
-
-
-
86.6
54.5
-
-
-
-
-
-
94.5
59.2
-
-
-
-
-
-
67.7
-
-
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
60.0
-
70.0
-
70.0
-
45.0
80.0
50.0
-
90.0
60.0
-
-
90.0
60.0
-
-
-
110.3
60.0
-
-
-
80.0
-
-
58McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Electrical Data – VFC, VFW 007 - 070
Unit with Desuperheater, ECM and 5kW Electric Heat Coil
Unit Size Voltage/Hz/Phase
007
009
012
015
019
024
030
036
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-1
265-60-1
208/230-60-3
208/230-60-1
208/230-60-3
460-60-3
n/a = Electric Heat not available in unit sizes 007, 009, 012, 015.
Compressor
RLA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
9.0
-
13.5
-
14.1
-
8.9
17.9
13.2
-
LRA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
48.0
58.3
73.0
58.0
112.0
88.0
Desuperheater Electric Total Unit
ECM Fan
Motor FLA Pump FLA Heater RLA FLA
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
2.80
-
-
2.80
-
-
4.30
-
-
4.30
4.30
4.30
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
0.4
-
0.4
-
0.4
-
0.4
0.4
0.4
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
22.5
-
22.5
-
22.5
-
22.5
22.5
22.5
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
34.7
-
39.2
-
41.3
-
36.1
45.1
40.4
-
Min. Voltage
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
197
197
197
197
197
197
Min. Circuit Max. Fuse or
Amps HACR Breaker Size
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
42.5
-
-
48.2
-
-
50.5
-
-
44.0
55.3
49.3
-
-
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
45.0
-
50.0
-
50.0
-
45.0
60.0
50.0
-
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 59
*Not available at time of publication. Please consult your McQuay Representative for specific availability
n/a = ECM not available in unit sizes 007, 009, 012.
Speed Nominal
High
007
01
01
019
0
030
0
0
0
060
070
Low
High
Low
High
2
Low
High
5
Low
High
Low
High
24
Low
High
Low
High
36
Low
High
42
Low
High
48
Low
High
High
Low
600
800
1000
1300
1400
1600
2000
2160
60 McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Add 8 lbs. to weights shown for units congured with electric heat.
2
Add 15 lbs. to weights shown for units with desuperheater.
*
Size 007 not available at time of publication. Please contact your local McQuay Representative for specic availability.
/ Hot Gas Reheat
(1) 30W x 24H x
3/4
3/4 3/4 3/4
3/4
3/4 3/4 3/4
318 / 356
321 / 361 387 / 430
1D
(2) 30W x 18H x
1D
389 / 432
340 / 378 345 / 383 412 / 452 414 / 454
n/a = Desuperheater & Hot Gas Reheat option not available for unit sizes 007, 009, 012 & 015.
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 61
Dimensional Data – Vertical Size
*
007, 009, 012
Left Hand and Right Hand Return
Left and Right Hand Return determined by facing the water connection side of the unit. *Size 007 not available at time of publication. Please contact your local
McQuay Representative for specic availability.
Top View – Left Hand Top View – Right Hand
Overall Unit Dimensions =
22¼"D x 20"W x 37"H
Left Hand Return Filter (Side) View Right Hand Return
Condensate
Drain Connection
Water Return
Condensate
Drain
Connection
Water Return
Water Supply
Low Voltage
7/8" (22mm)
Hole
Line Voltage
7/8" (22mm) Hole
Low
Voltage
7/8"
(22mm)
Hole
Line
Voltage
7/8"
(22mm)
Hole
Water Supply
Dimensions
Unit Size A B C D E F (Left Hand) F (Right Hand) G H J K M
Note: Nominal lter thickness is 3/4" (±1/16") or 1¾" (±1/16")
2" 30" 18"
060 – 070
66 McQuay Ennity Water Source Heat Pumps Catalog 1103-2
2
Accessories – Field Installed
These easy-to-operate comfort command centers bring
you a complete range of deluxe features. Features that
enable you to match temperature programming to your application, provide added convenience, and help save energy
and money. All packed into an extra rugged, highly reliable
design that will look and perform like new for years to
come.
Programmable Electronic Thermostat Two-
Stage Heat/Two-Stage Cool, 7-Day Programmable
McQuay Part No. 668375301
(1-Pk, White with Wall Plate)
668375301 – Specications
Electrical Rating:
• 24 VAC (18 to 30 VAC/VDC)
• 1 amp maximum per terminal
• 4 amp maximum total load
• Easy access terminal block
Temperature Control Ranges:
• 45ºF to 90ºF (7ºC to 32ºC), Accuracy: ± 1ºF (± 0.5ºC)
System Congurations:
• Two-stage heat/Two-stage cool
Terminations:
• R, C, W1, Y1, W2, Y2, G, S1, S2
Non-Programmable, Auto or Manual Change-
over Two Stage Heat/Two Stage Cool, Night
Setback Override
McQuay Part No. 668375401
(1-Pk, White with Wall Plate)
Features
• Hardwired
• Programmable and congurable
• Simpleset
programming for the entire week
•
Title 24 compliant/No batteries required
• Relay Ouputs (minimum voltage drop in thermostat)
• Clear, backlit display makes it easy to see time,
temperature, and setpoint — even in the dark
•
Ideal l y suit e d for: Li ght com merc i al/r esid enti al
(new construction/replacement)
•
Lockout feature prevents unwanted tampering
• Optional remote temperature sensor available
(see page 68)
TM
feature enables easy copying of one day's
Features
• Hardwired
• Two-stage heat / two-stage cool systems
• Backlit display
• Field temperature calibration
• Status indicator light
• Relay outputs (minimum voltage drop in thermostat)
• Night set-back override (used when unit is wired through
a time clock on the U-terminal)
Optional remote temperature sensor available
•
(see page 68)
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 67
Accessories – Field Installed
668375401 – Specications
Electrical Rating:
• 24 VAC (18 to 30 VAC/VDC)
• 1 amp maximum per terminal
• 4 amp maximum total load
• Easy access terminal block
Temperature Control Ranges:
• 45ºF to 90ºF (7ºC to 32ºC), Accuracy: ± 1ºF (± 0.5ºC)
System Congurations:
• Two-stage heat / two-stage cool
Timing:
• Backlight Operation: 13 seconds after mode change or
button press
Terminations:
• +R, -C, W1, Y1, W2, Y2, G, O, S1, S2
Optional Remote Sensor
Part No. 667720401 – Used with Thermostat(s)
668375301 & 668375401
The fast, easy solution for temperature sensing problems.
• For tamper prone areas
• Poor airow areas
• Troubled applications
• Foam gasket prevents drafts
through wall opening
Mounts to standard 2" x 4"
•
outlet box
•
2
3
/
"W x 4
4
1
/
"H
2
MicroTech III Water Source Heat Pump
Room Temperature Sensors
(Kit P/N 669529101, 669529201, 669529001)
Sensor 669529101
Sensor 669529201 Not Shown
Room temperature sensors provide electronic sensing of
room temperatures at wall locations. All sensor models
feature a thermistor (10kΩ), a green LED for unit
status and tenant override button. Setpoint adjustment
potentiometer, heat and fan mode switches are optional
features.
669
enant Override
T
Button
SPT
Status LED
Fan and
Mode Switches
Notes:
1
55º to 95°F (13º to 35ºC)
2
-3º to +3ºF (-1.5º to +1.5ºC)
Feature
Adj. Pot No Yes Yes
Yes Yes Yes
Sensor Kit Part Numbers
529001 669529101 669529201
Yes Yes Yes
No
MicroTech III Wall Sensor Details
Sensor 669529001
1
Yes
2
Yes
0 to 10 K ohm
Potentiometer
3.75"
Status LED
(Green)
4.59"
Mode Control
Slide Switch
68McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Tenant Override
Momentary Push Button Switch
Fan Control
Slide Switch
Accessories – Field Installed
Supply and Return Water Hoses
Available as re rated construction in 2 or 3 foot (610
mm or 914 mm) lengths. Fire rated hoses have a synthetic
polymer core with an outer rated covering of stainless
steel. Fittings are steel. Assembly is “re rated” and tested
according to UL 94 with a VO rating and ASTM 84. Each
hose has MPT connections. Fire rated hoses have a swivel
connection at one end. Hoses are available in 3/4" (19 mm)
to match the FPT ttings on the unit.
Flow Control, Supply and Return Water Hoses
Condensate Hose Kit
Available as a long clear plastic hose with the necessary
clamps and a MPT hose tting for connection to the FPT
eld piping.
Condensate Hose Kit
Field Installed Controls
Used for variable pumping applications, the valve is
wired in the compressor circuit and piped in the return
water line from the unit.
2-Way Motorized Valve
A motorized valve relay and control valve assembly in-
cludes a relay, valve and wire harness. The valve opens
when the compressor is on and closes when the compressor is off. The valve is rated for 300 psig (2070 kPa).
A multiple unit control panel allows a single thermostat
to control up to three units in parallel.
An auxiliary relay controls optional devices when the fan
is operating. The relay has SPDT contacts.
Combination Balancing and Shutoff (Ball)
Valves
Constructed of brass and rated at 400 psig (2758 kPa)
maximum working pressure. Valves have a built-in adjustable memory stop to eliminate rebalancing. Valves have
FPT connections on both ends for connection to the water
hose and to the eld piping.
Shut off Ball Valve
Two-inch Filter Rack
Selectable as factory-mounted or as an optional eld-in-
stalled kit, replacing the standard 1" lter rack. It provides
a 1" (25 mm) extended collar for connection of return air
ductwork and accepts a 2" (51 mm) thick, high perfor-
mance lter. The lter rack can be mounted for left hand
or right hand lter removal by rotating it 180 degrees. Two
thumb screws allow easy removal of the access door for
quick lter changes without using a tool.
Optional Two-inch Filter Rack
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 69
Control Connection Diagrams
MicroTech III Unit Control Board
Low Voltage Terminal Strip (Circuit 1)
W1
Y1
W2
Y2
G
Thermostat
Terminals
-
C
TB2
24VAC
Alarm Output
Heat 2
Heat 1
Cool 2
Cool 1
Fan
Tenant Override
24VAC Common
C
O
G
Y1
Y2
W1
W2
A
R
+
R
MicroTech III Unit Control Board
Low Voltage Terminal Strip (Circuit 1)
W1
Y1
W2
Y2
G
Thermostat
Terminals
-
C
TB2
24VAC
Alarm Output
Heat 2
Heat 1
Cool 2
Cool 1
Fan
Tenant Override
24VAC Common
C
O
G
Y1
Y2
W1
W2
A
R
+
R
O
Programmable Electronic Thermostat
Two-Stage Heat/Two-Stage Cool, 7-Day
Programmable
1 Circuit (Part No. 668375301)
Notes: Includes Thermostat and Wall Plate.
Optional Remote Sensor Wiring to
Thermostat(s) 668375301 or 668375401
Part No. 667720401
Thermostat
Remote Sensor
S2
S1
S1
S2
Wire 2
Cut R12 from
circuit board
Wire 1
Optional Water Source Heat Pump Room
Temperature Sensors Wiring
Kit Part No.s 669529101, 669529201
Non-Programmable, Auto or Manual
Changeover Two Stage Heat/Two Stage
Cool, Night Setback and Override Feature
1 Circuit (Part No. 668375401)
Note: An additional conductor is required between "O"
terminals for the override feature to work.
70McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Override (Optional)
Temperature
Sensor Terminals
MicroTech III Unit
Controller TB1 Terminals
Temperature Sensor Wiring to MicroTech III Unit Controller
(Part No. 669529001)
Temperature
Sensor Terminals
MicroTech III Unit
Controller TB1 Terminals
Typical Wiring Diagrams
MicroTech III Unit Controller (Standalone) – 208/230/460/575/60Hz/3-Phase
Table B
RED
208V
230V ORG
*Drawing No. 668991201
Shown with optional desuperheater
pump wiring.
Legend
Item Description
C1 Capacitor-Compressor
C2 Capacitor-Fan
CC Compressor - Contactor
CM Compressor - Motor
COS Condensate Overow Sensor
DAT Discharge Air Temp Sensor
EWT Entering Water Temp Sensor
HP High Pressure Switch
HTR Electric Heater Cartridge
IOEXP I/O Expansion Board / Harness
ISO-NC Isolation Valve - Normally Closed
ISO-NO Isolation Valve - Normally Open
LED1 LED Annunciator / Harness
LED2 LED Annunciator / Harness
LP Low Pressure Switch
SLTS Suction Line Temp Sensor
LWT Leaving Water Temp Sensor
MIII MicroTech III Main Board
R1 Relay - Fan Motor
R2 Relay - Electric Heat
RAT Return Air Temp Sensor
RV Reversing Valve Solenoid
TB1 Power Terminal Block
X1 Transformer
_____
_ _ _
_
Standard Unit Wiring
Optional Wiring (by others)
Notes:
1. Main board jumpers:
No jumpers shorted. All open.
Note: The gray tinted areas in the wiring diagram; Leaving Water (LWT), Discharge Air (DAT) and Return Air (RAT) Temperature
sensors are shipped or are eld installed on units congured with a communication module.
*Wiring diagrams are typical. For the latest drawing version refer to the wiring diagram located on the inside of the controls
access panel of the unit.
Catalog 1103-2McQuay Ennity Water Source Heat Pumps71
Typical Wiring Diagrams
MicroTech III Unit Controller with Optional ECM Motor, Desuperheater and I/O Expansion
Module –
Table B
208V
230V ORG
265V BRN
277V BRN
*Drawing No. 668991501
208/230/265/277/60 Hz/1-Phase
RED
Legend
Item Description
C1 Capacitor-Compressor
C2 Capacitor-Fan
CC Compressor - Contactor
CM Compressor - Motor
COS Condensate Overow Sensor
DAT Discharge Air Temp Sensor
EWT Entering Water Temp Sensor
HP High Pressure Switch
HTR Electric Heater Cartridge
IOEXP I/O Expansion Board / Harness
ISO-NC Isolation Valve - Normally Closed
ISO-NO Isolation Valve - Normally Open
LED1 LED Annunciator / Harness
LED2 LED Annunciator / Harness
LP Low Pressure Switch
SLTS Suction Line Temp Sensor
LWT Leaving Water Temp Sensor
MIII MicroTech III Main Board
R1 Relay - Fan Motor
R2 Relay - Electric Heat
RAT Return Air Temp Sensor
RV Reversing Valve Solenoid
TB1 Power Terminal Block
X1 Transformer
_____
Standard Unit Wiring
_ _ _
_
Optional Wiring (by others)
Notes:
1. Main board jumpers:
No jumpers shorted. All open.
Note: The gray tinted areas in the wiring diagram; Leaving Water (LWT), Discharge Air (DAT) and Return Air (RAT) Temperature
sensors are shipped or are eld installed on units congured with a communication module.
*Wiring diagrams are typical. For the latest drawing version refer to the wiring diagram located on the inside of the controls access
panel of the unit.
72 McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Typical Wiring Diagrams
MicroTech III Unit Controller with Optional ECM Motor, Desuperheater, Electric Heat Coil and I/O Expansion
Module – 2
Table B
208V
230V ORG
460V BLK/RED
*Drawing No. 668991301
08/230/460/60 Hz/3-Phase
RED
Legend
Item Description
C1 Capacitor-Compressor
C2 Capacitor-Fan
CC Compressor - Contactor
CM Compressor - Motor
COS Condensate Overow Sensor
DAT Discharge Air Temp Sensor
EWT Entering Water Temp Sensor
HP High Pressure Switch
HTR Electric Heater Cartridge
IOEXP I/O Expansion Board / Harness
ISO-NC Isolation Valve - Normally Closed
ISO-NO Isolation Valve - Normally Open
LED1 LED Annunciator / Harness
LED2 LED Annunciator / Harness
LP Low Pressure Switch
SLTS Suction Line Temp Sensor
LWT Leaving Water Temp Sensor
MIII MicroTech III Main Board
R1 Relay - Fan Motor
R2 Relay - Electric Heat
RAT Return Air Temp Sensor
RV Reversing Valve Solenoid
TB1 Power Terminal Block
X1 Transformer
_____
Standard Unit Wiring
_ _ _
_
Optional Wiring (by others)
Notes:
1. Main board jumpers:
No jumpers shorted. All open.
Note: The gray tinted areas in the wiring diagram; Leaving Water (LWT), Discharge Air (DAT) and Return Air (RAT) Temperature
sensors are shipped or are eld installed on units congured with a communication module.
*Wiring diagrams are typical. For the latest drawing version refer to the wiring diagram located on the inside of the controls access
panel of the unit.
Catalog 1103-2McQuay Ennity Water Source Heat Pumps73
Typical Wiring Diagrams
MicroTech III Unit Controller with Optional ECM Motor, Desuperheater, and I/O Expansion Module
208/230/460/60/3-Phase
Table B
RED
208V
230V ORG
460V BLK/RED
*Drawing No. 668991401
Legend
Item Description
C1 Capacitor-Compressor
C2 Capacitor-Fan
CC Compressor - Contactor
CM Compressor - Motor
COS Condensate Overow Sensor
DAT Discharge Air Temp Sensor
EWT Entering Water Temp Sensor
HP High Pressure Switch
HTR Electric Heater Cartridge
IOEXP I/O Expansion Board / Harness
ISO-NC Isolation Valve - Normally Closed
ISO-NO Isolation Valve - Normally Open
LED1 LED Annunciator / Harness
LED2 LED Annunciator / Harness
LP Low Pressure Switch
SLTS Suction Line Temp Sensor
LWT Leaving Water Temp Sensor
MIII MicroTech III Main Board
R1 Relay - Fan Motor
R2 Relay - Electric Heat
RAT Return Air Temp Sensor
RV Reversing Valve Solenoid
TB1 Power Terminal Block
X1 Transformer
_____
Standard Unit Wiring
_ _ _
_
Optional Wiring (by others)
Notes:
1. Main board jumpers:
No jumpers shorted. All open.
Note: The gray tinted areas in the wiring diagram; Leaving Water (LWT), Discharge Air (DAT) and Return Air (RAT) Temperature
sensors are shipped or are eld installed on units congured with a communication module.
*Wiring diagrams are typical. For the latest drawing version refer to the wiring diagram located on the inside of the controls
access panel of the unit.
74 McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Typical Wiring Diagrams
MicroTech III Unit Controller with PSC Motor, Desuperheater and I/O Expansion Module for Hot Gas Reheat
Control (Unit Sizes 019-070) 208/230/60/1-Phase
Table B
RED
208V
230V ORG
*Drawing No. 669007101A
Legend
Item Description
C1 Capacitor-Compressor
C2 Capacitor-Fan
CC Compressor - Contactor
CM Compressor - Motor
COS Condensate Overow Sensor
DAT Discharge Air Temp Sensor
EWT Entering Water Temp Sensor
HP High Pressure Switch
HTR Electric Heater Cartridge
IOEXP I/O Expansion Board / Harness
ISO-NC Isolation Valve - Normally Closed
ISO-NO Isolation Valve - Normally Open
DSHP Desuperheater Pump
HGRH 3-Way Valve Solenoid
P1 24 VAC Supply I/O Expansion Brd.
LED1 LED Annunciator / Harness
LED2 LED Annunciator / Harness
LP Low Pressure Switch
SLTS Suction Line Temp Sensor
LWT Leaving Water Temp Sensor
MIII MicroTech III Main Board
R1 Relay - Fan Motor
R2 Relay - Electric Heat
RAT Return Air Temp Sensor
RV Reversing Valve Solenoid
TB1 Power Terminal Block
X1 Primary 24 VAC Transformer
X2 Secondary 24 VAC Transformer
_____
Standard Unit Wiring
_ _ _
_
Optional Wiring (by others)
Notes:
1. Main Board Jumpers:
JP3 Geothermal.
2. I/O Expansion Board Jumpers:
JP4 Hot Gas Reheat.
JP3 Supplemental EH.
JP4 Boilerless EH.
JP5 2-Speed Fan
Transformer:
Unused wire to be capped.
Note: The gray tinted areas in the wiring diagram; Leaving Water (LWT), Discharge Air (DAT) and Return Air (RAT) Temperature
sensors are shipped or are eld installed on units congured with a communication module.
*Wiring diagrams are typical. For the latest drawing version refer to the wiring diagram located on the inside of the controls
access panel of the unit.
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 75
Engineering Guide Specications
General
Units shall be supplied completely factory assembled, piped, internally wired, fully charged with [R-410A, vertical unit sizes
009-070] and capable of operation with an entering water temperature range from [55°F to 110°F on models VFC] [30° to 110°F
(-6.7°C to 49°C) on models VFW]. All equipment must be rated and certied in accordance with ARI / ISO 13256-1, ETL, ETL
and have correct ARI / ISO and ETL labels mounted on side of the cabinets. Each unit shall be run tested at the factory. The
installing contractor shall be responsible for furnishing and installing McQuay Water Source Heat Pumps as indicated on the
plans and per installation instructions.
Casing and Cabinet
The cabinet shall be fabricated from heavy gauge G-60 galvanized sheet metal with interior surfaces lined with 1/2-inch thick,
1-1/2 lb. [1/2" thick coated glass ber insulation] [3/8" thick closed-cell non-brous Rubatex IAQ insulation]. The insulation
shall have a ame spread of less than 25 and a smoke developed classication of less than 50 per ASTM E-84 and UL 723. All
berglass shall be coated and have exposed edges tucked under anges to prevent the introduction of glass bers into the air
stream. All insulation must meet NFPA 90A requirements.
The cabinet shall have a pre-painted nish as an option. Color to be Antique Ivory.
Units shall be congured in one of the following airow arrangements:
■ Left Return/Top Discharge
■ Right Return/Top Discharge
Units shall have a factory-installed 1" duct ange on the discharge of the blower and must have a minimum of two access
panels, one for the compressor compartment and one for the blower compartment. Unit shall have an insulated panel separating
the blower compartment from the compressor compartment. Units are to ship with heavy metal brackets, rubber isolators,
fasteners and washers to suspend and isolate the unit from the building.
Cabinets shall have separate openings and knockouts for entrance of line voltage and low voltage control wiring. Supply and
return water connections shall be brass FPT ttings and shall be securely mounted ush to the cabinet corner post allowing for
connection to a exible hose without the use of a back-up wrench. Unit shall have a high-density polyethylene plastic “dualsloped” drain pan with a drain connection being ush mounted to the unit casing. It is the installing contractor’s responsibility
to provide sufcient clearance so that units can be easily removed for servicing.
Filter Rack and Filters
Unit shall have a 1" (25 mm thick [throwaway] construction lter and a 1" factory-installed combination lter rack/return
air duct collar. The lters shall be removable from either side of the unit.
Unit shall have a 2" (51mm) thick construction lter factory installed when the user selects an optional 2" lter rack/return
air duct collar. The 2" lter rack is design to accommodate a standard 2" pleated lter.
Refrigerant Circuit
Units shall have a sealed refrigerant circuit, which includes a non-CFC depleting R-410A refrigerant [rotary (sizes 007-015),
and scroll compressor (sizes 019 to 070)]. In addition each unit will have a thermostatic expansion valve, an aluminum n and
ried copper tube refrigerant-to-air heat exchanger, a reversing valve and a water-to-refrigerant coaxial heat exchanger. The
coaxial coils shall be made of [copper] [or optional cupronickel] and shall be deeply uted to enhance heat transfer and minimize
fouling and scaling. The coaxial coil shall have a working pressure of 400 psig on the waterside of the unit and 500 psig on the
refrigerant side for all R-410A units.
Refrigerant metering shall be regulated by a thermostatic expansion valve (TXV) only. Reversing valve shall be four-way
solenoid activated refrigerant valve, which fails in the cooling “dominant” operation. Safety controls include a high-pressure
switch, a low-pressure switch (sizes 019 to 070 only) and a low refrigerant temperature sensor. Refrigerant gauge access ttings
shall be factory installed on high and low pressure refrigerant lines to facilitate eld service. Activation of any safety switch
shall prevent the compressor from operating. Units shall be capable of being reset only by interrupting the power supply to the
unit. Unit shall not be able to be reset from the wall thermostat.
76 McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Engineering Guide Specications
Electric Heat Coils
The optional electric heat coil (5kW or 10kW) shall be factory installed inside the unit cabinet, be integral to the supply fan
housing and be used as auxiliary or emergency heat.
Desuperheater
The optional desuperheater shall be factory installed in the compressor compartment and used to add supplemental heating,
using superheated refrigerant gas through a tube-in-tube heat exchanger to the domestic hot water supply. The desuperheater
pump shall be factory installed inside the unit compressor compartment and water lines shall be fastened to the exterior panel
with ush mounted brass NPT ttings.
Hot Gas Reheat Coil Option
The optional factory-installed hot gas reheat coil shall be used as part of a dehumidication operating sequence. The hot gas
reheat coil shall be enabled when the space humidity level is above a user selectable set point. Typically, 50 to 55% RH. Hot
gas shall be diverted to the reheat coil only when the unit is in the cooling mode of operation.
Motorized Isolation Valves
The optional 2-way motorized isolation valves shall be factory installed inside the compressor compartment. The valve actuator
shall be factory wired to the Microtech III controller and be controlled when there is a call for heating or cooling.
Drain Pan
The condensate pan shall be constructed of high impact IAQ, High Density Polyethylene (HDPE) plastic to prevent corrosion
and sweating. The bottom of the drain pan shall be sloped on two planes to provide complete drainage of water from the pan.
The water source heat pump unit shall be supplied with standard solid-state electronic condensate overow protection.
Fan and Motor Assembly
Units 6 tons and smaller shall have a direct drive centrifugal fan. The fan housing shall have a removable orice ring to
facilitate fan motor and fan wheel removal. The fan housing shall protrude through the cabinet to facilitate eld supply duct
connection. The standard fan motor shall be PSC type isolated from the fan housing and shall have internal thermal overload
protection. Units above one ton shall have a terminal strip mounted on the fan motor to facilitate motor speed change. The fan
and motor assembly must be capable of overcoming the external static pressures as shown on the schedule. An ECM motor shall
be optional for unit sizes 019 thru 070. The ECM motor shall deliver precise speed and economical performance regardless of
system static pressure.
Electrical
A control box shall be located within the unit and shall contain controls for compressor, reversing valve and fan motor operation
and shall have either, a 50VA or (optional) 75VA transformer and a terminal block for low voltage eld wiring connections. Unit
shall be name-plated to accept time delay fuses or HACR circuit breaker for branch over-current protection of the power source.
Unit control system shall provide heating or cooling as required by the set points of the wall thermostat. The unit control scheme
shall provide for fan operation simultaneous with compressor operation (fan interlock) regardless of the thermostat type. The unit
shall be capable of providing an output signal to an LED on the thermostat or to a central monitoring panel to indicate a “fault”
condition from the activation of any one of the safety switches. An optional 75VA transformer may be necessary
Catalog 1103-2 McQuay Ennity Water Source Heat Pumps 77
Engineering Guide Specications
Solid-State Control System
MicroTech III Control System - Unit shall have a microprocessor- based control system. The unit control logic shall provide
heating and cooling operation as required by the wall thermostat set point. The control system shall provide the following for
stand-alone operation:
1. The use of standard non-programmable or programmable wall thermostats.
2. Fan operation simultaneous with the compressor (fan interlock) regardless of thermostat logic.
3. Time delay compressor operation.
4. Delayed de-energizing of the reversing valve for quiet reversing valve operation.
5. Compressor short cycle protection of a minimum of three minutes before restart is possible.
6. Random unit start-up after coming off on unoccupied mode.
7. Single grounded wire connection for activation of the unoccupied or unit shutdown modes.
8. Night setback temperature setpoint input signal from the wall thermostat.
9. Override signal from wall thermostat to override unoccupied mode for 2 hours.
10. Brownout protection to suspend unit operation if the supply voltage drops below 80% of normal.
11. Condensate overow protection to suspend cooling operation in an event of a full drain pan.
12. Suspended compressor operation upon activation of the refrigerant pressure switch(es).
13. Cooling operation activated for 60 seconds upon activation of the low suction temperature sensor -
defrost cycle.
14. Method of defeating compressor, reversing valve and fan time delays for fast service diagnostics.
15. Remote reset - Provides means to remotely reset automatic lock-outs generated by high/low pressure faults and/or
low temperature faults.
16. Fault Retry clears faults the 1st two times they occur within a 24-hour period and triggers automatic lock-out on
3rd fault.
MicroTech™ III Control with LonWorks communication module – Unit shall have a microprocessor-based control
system. The unit control logic shall communicate over a LonMark communications network. The unit controller is factory
programmed [LonMark ® 3.3 certied Application Code the current standard for new applications] and tested with all the
logic required to monitor and control heating and cooling operation. The controller sets the unit mode of operation, monitors
water and air temperatures, and can communicate fault conditions via a LonMark communications network. Units with the
MicroTech III and LonWorks communication module include return air, discharge air and leaving water temperature sensors.
Space temperature sensor options include a set-point adjustment, tenant override button, and the capability of substituting the
return air sensor with a wall-mounted room sensor.
Microtech III Control w/ BACNet Communication module – Unit shall have a microprocessor-based control system.
The unit control logic shall communicate over a BACnet communications network. The BACNet communication module shall
incorporate an Atmel ARM7 Thumb series MCU and be capable of supporting a full MSTP BACNet implementation. The
microprocessor shall also support SPI compatible communications with the MCU of the Microtech III controller. The physical
interface to a BACNet BAS network shall be through an industry standard RS-485 transceiver capable of existing on an RS485 network of up to 64 nodes. The unit controller is factory programmed and tested with all the logic required to monitor and
control heating and cooling operation. The controller sets the unit mode of operation, monitors water and air temperatures, and
can communicate fault conditions via a BACNet communications network. Units outtted with Microtech III and BACNet
Communication modules include return air, discharge air and leaving water temperature sensors. Space temperature sensor
options include a set-point adjustment, tenant override button, and the capability of substituting the return air sensor with a
wall-mounted room temperature sensor.
Each communicating unit controller performs the following unit operations:
■ Enable heating and cooling to maintain space temperature set point at the room sensor
■
Enable fan and compressor operation
■ Monitor all safety controls
■ Monitor discharge and return air temperature
■ Monitor leaving water temperature
■ Relay status of all vital unit functions
■ Support optional control outputs
78 McQuay Ennity Water Source Heat Pumps Catalog 1103-2
Engineering Guide Specications
Unit mounted LED annunciators aid in diagnosing unit operation by indicating the water source heat pump operating mode
and alarm conditions. If there are no current alarm conditions, a green LED on the annunciator board will indicate normal
unit operating mode. If an alarm condition exists, the Microtech III unit controller will send the fault condition to the LED
annunciator, which will assist in troubleshooting the unit. Heat pumps with the MicroTech III Unit Controller with a LonWorks
Communication Module is designed to be linked with a centralized Building Automation System (BAS) through a LonMark
communications network for centralized scheduling and management of multiple heat pumps.
Wall-mounted room sensors are available to control the heating and cooling operation of each MicroTech III Water Source
Heat Pump.
Available room sensors include:
■ Room Sensor with timed override button and LED;
■ Room temperature sensor with timed-override button and set point adjustment (55 to 95 deg F);
■ Room sensor with timed-override button and set point adjustment (-3 to +3 deg F);
■ Room sensor (no options, sensor only).
Warranty
An optional 4-year extended compressor warranty covers the compressor for 5 years from the date at which the unit ships
from the factory.
An optional 4-year extended refrigeration circuit warranty covers the entire refrigeration circuit and related components for
5 years.
system "Mode/Prog" and fan "Auto/On" switches. Thermostat shall have the option of an Optional Remote Sensor.
■ Non-programmable, auto or manual changeover Two-stage heat/Two-stage cool, night setback override. Subbase
shall have system "Cool/Off/Heat/Auto" and fan "Auto/On switches. Thermostat shall have the option of an Optional
Remote Sensor.
Wall Temperature Sensor Options:
■ Wall Sensor with timed-override button.
■ Wall Sensor with timed-override button and set point adjustment (55 to 95 deg F), fan mode switch (auto/on),
operational mode button (Heat/Cool/Auto) and status LED to display fault condition.
■ Wall Sensor with timed-override button and set point adjustment (-3 to +3 deg F), fan mode switch (auto/on), operational
mode button (Heat/Cool/Auto) and status LED to display fault condition.
Hose Kits:
Two re-rated exible hoses with ASTM ratings of Flame Spread 25, Fuel Contribution 25 and Smoke Density 50 for
connection to unit and eld piping. Hose shall be covered with stainless steel braiding to prevent damage.
Valve Options:
■ Combination balancing and shutoff valve with adjustable memory stop.
■ Optional 2-way, Normally Open (N.O.) or Normally Closed (N.C.) motorized valves.
Automatic Flow Hose Kit:
The automatic ow hose kit shall include an automatic ow control valve, two ball valves, two exible hoses, a high ow Ystrainer, and may include a strainer blow-down and various other accessories. The automatic ow control valve shall be factory
set to a rated ow, and shall automatically control the ow to within 10% of the rated value over a 40 to 1 differential pressure,
operating range (2 to 80 PSID). Operational temperature shall be rated from uid freezing, to 225°F. The valve body shall be
constructed from hot forged brass UNS C37700 per ASTM B-283 latest revision.
Catalog 1103-2McQuay Ennity Water Source Heat Pumps79
McQuay Water Source Heat Pumps
Quality Products, Flexible Congurations
Large Vertical Units
6 to 25 Ton
Large Horizontal Units
6 to 10 Ton
Ennity Vertical &
Horizontal Units
1/2 to 6 Ton
Console Units 1/2 to 1
Rooftop Units
3 to 35 Ton
1
/2 Ton
Water to Water Source
Heat Pump Units
3 to 35 Ton
Warranty
All McQuay equipment is sold pursuant to its standard terms and conditions of sale, including Limited
Product Warranty. Consult your local McQuay Representative for warranty details. Refer to Form
933-43285Y. To nd your local McQuay Representative, go 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 ISO Certied Facility.