McQuay VFW User Manual

Flexible, High Efficiency Cooling and Heating Solutions.

™

Enfinity

Vertical Water Source
Heat Pumps

Standard Range – Model VFC
Geothermal Range – Model VFW

Engineered for flexibility and performance

™

™

Water Source Heat Pumps

With Enfinity Water Source Heat
Pumps You Benefit From:

■

High efficiency, low operating costs.

■

R-410A refrigerant with no ozone

depletion potential or phase-out date.

■

Easy, low cost design and

installation.

■

Open Choices™ controls feature

allows easy, low cost integration
with a Building Automation System
(BAS) of your choice.

■

Boiler/tower or geothermal

application flexibility.

■

Integral electric heat coil for

supplemental electric heat.

More than 30 years ago, McQuay designed the rst complete

line of water source heat pumps for high efciency, individually-

zoned comfort control in ofces, 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.

Ennity water source heat pumps incorporate the best of our
past and the best of what’s new. Using feedback from building
owners, consulting engineers, contractors and service engineers,
we designed Ennity 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 Efciency Ratios (EER’s)–helps preserve our
environment and precious energy resources.

■

Desuperheater (optional) reduces

energy required to produce domestic
hot water and may eliminate
requirement for separate water
heating equipment.

■

Hot Gas Reheat (optional) helps

improve comfort in the conditioned
space. During dehumidification mode,
the return air is cooled and dried over
the evaporator coil and then reheated
through the hot gas reheat coil to
maintain space temperature setpoint.

ommon Applications:

C

●

Indoor swimming facilities, locker

rooms.

●

Units pulling outside air for

ventilation requirements.

●

Computer rooms.

●

Auditoriums / Gymnasiums.

■

Quiet, reliable operation.

■

Easy, low cost maintenance

and service.

To learn how you can take advantage of the benets of
McQuay Ennity water source heat pumps on your next new
building or replacement project, contact your local McQuay
Representative or visit www.mcquay.com.

5 Cabinet Sizes – G-60 Galvanized or Pre-painted (Optional)
1/2 to 6 ton – Size *007 through 070
Model VFC (Standard Range: 55ºF to 110ºF)
Model VFW (Extended Range/Geothermal: 30ºF to 110ºF)

* Unit size 007 not available at time of publication. Please contact your local

 McQuayrepresentativeforspecicavailability.

■

Painted cabinet – ideal for

residential applications.

2

Save Energy & Reduce Design, Installation, Operating Costs

Owner, Engineer and Contractor Benefits

The Building Owner

■

High efciency units reduce energy consumption/operating costs

and can contribute to earning points toward LEED® certication.

■

Open Choices control feature gives you the exibility to select

standalone thermostat operation or easy, low cost integration with
the BAS of your choice using an add-on communication module.

■

R-410A refrigerant has no ozone depletion potential or phase-

out date, helping to minimize environmental impact and protect
against refrigerant availability issues over the economic life of
your equipment investment.

■

Large fan wheel, quiet compressor selections and low vibration

design promote quiet operation.

■

Double-sloped polymer drain pan and optional closed cell insula-

tion promote superior indoor air quality.

■

Durable construction promotes long life, reliable operation.

The Engineer

■

Boiler/tower or geothermal unit selections provide flexibility in

designing the system that best meets the performance and budget
requirements of your project.

■

Multiple configurations reduce design time and cost by allowing

you to avoid obstructions and use minimum ductwork.

■

Multiple features and options (ECM motor, desuperheater, hot gas

reheat, integral electric heat, painted cabinet) give you the flexibil­ity to select units that closely match application requirements.

Exceeds ASHRAE 90.1
Efficiency Requirements

Ground Loop – Cooling

Ground Loop – Heating

Installing Contractor / Service Personnel

■

Small footprint design makes it easier to meet space requirements

of new construction and replacement applications.

■

Flush FTP water fittings save time in making water connections

using one wrench.

■

Factory-installed filter rack saves time and expense to field-install

a filter rack.

■

External LED status lights allow quick troubleshooting – no need

to open up the unit.

■

Easy access to the unit compressor (2-sides), fan section (1-side),

motor (1-side) and unit controls (front access).

■

A removable orifice ring allows the blower and motor to be re-

moved without removing the blower housing or disconnecting the
unit from the ductwork.

3

Flexible Design with Added Features

Wall Thermostats and Wall Sensors

Easy-to-operate comfort command
centers provide a complete range of
deluxe features. Choose between a 7-day
programmable or a non-programmable
thermostat for temperature control to match
your application, provide convenience
and help save energy and money. Three
wall temperature sensors are available;
sensor with tenant override, with set point
adjustment (55° to 95°F) and wall sensor
with setpoint adjustment (-3° to +3°F).

Two-Stage Heat/Two­Stage Cool, 7-Day
Programmable Electronic
Thermostat

Auto or Manual Changeover
Two-Stage Heat/Two-Stage
Cool, Nigh Setback Override
Non-Programmable
Electronic Thermostat

Remote Sensor
667720401

(Used with wall mounted thermostat)

Room Temperature Sensors

• Set Point Adjustment (55° to 95°F)

• Set Point Adjustment (-3° to +3°F)

Sensor 668900801

•

Set Point Adjustment

• LED

• Override feature

Sensor 669088101

•

Status LED

• Override Button

Electric Heat (Optional) – Integral electric heat coil provides

1

supplemental or emergency heat when conditions require.

Electronically Commutated Motor (ECM-Optional) – ECM motor provides

2

quiet, efcient operation while maintaining constant CFM over its static
operating range. Factory programmed for 3-speeds.

3

MicroT

LED

4

Compact Cabinet – The standard unit is constructed of unpainted G-60

5

Desuperheater (Optional) – Saves energy by producing domestic hot

6

Filter & Filter Rack – Units come standard with a 1" (25.4 mm) thick

7

Removable

8

9

Piping Connections – Water connections are FPT water ttings, ush

10

Coaxial Heat Exchanger – Designed for maximum heat transfer at normal

Hot Gas Reheat Coil – Optional coil provides superior humidity control

11

2-W

ech® 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 LonWorks® or BACnet® communication module can be easily
snapped onto the board to accommodate the building automation system
of your choice.

Annunciator – External LED status lights display fault conditions to

provide easy troubleshooting and diagnosis.

galvanized steel, with the smallest possible footprint. Optional painted
cabinet is ideal for aesthetic requirements of residential applications.

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 requirement for separate water heating equipment.

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
efciency lters

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.

with the outside of the cabinet for easy one-wrench connection to units.
A large condensate connection provides proper condensate removal.

and low water ow rates with minimum pressure drop. The inside tube
is deeply uted to enhance heat transfer and minimize fouling. A cupro­nickel heat exchanger is available as a selectable option.

for occupant comfort. Uses expelled heat from the refrigeration cycle
and redirects 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 must be used in conjunction with the unit to
measure and adjust the humidity setpoint in the space.

ay Motorized Isolation Valve (Optional - Not Shown) –

Control valve can be factory-installed or eld-installed to handle
variable speed pumping requirements. Both standard and high cut-off
pressure valves are available as a selectable option.

4