Engineered for flexibility and performance™
ThinLine™ 3G Vertical Unit Heaters Catalog 723
Type FHVC, FHVH, FHVS, FHWC Vertical Design
Model FHVS
Model FHVC
Contents
Nomenclature and Certification 3
ThinLine 3G Vertical Cabinet Unit Heaters . . . . . 3
ARI Certification . . . . . . . . . . . . . . . . . . . . . . . 3
Agency Listed . . . . . . . . . . . . . . . . . . . . . . . . . 3
Features and Benefits 4
The ThinLine™ 3G Advantage. . . . . . . . . . . . . . . 4
For building owners. . . . . . . . . . . . . . . . . . . . . 4
For specifying engineers. . . . . . . . . . . . . . . . . 4
For contractors . . . . . . . . . . . . . . . . . . . . . . . . 5
Options and Accessories 6
Control Options . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Manual 4-Position Fan Switch. . . . . . . . . . . . . 6
Unit-Mounted, Mechanical Thermostat With 4-Po-
sition Fan Switch. . . . . . . . . . . . . . . . . . . . . . . 6
Digital Thermostats. . . . . . . . . . . . . . . . . . . . . 6
DDC Interface Board. . . . . . . . . . . . . . . . . . . . 7
Customer-Supplied Controls. . . . . . . . . . . . . . 7
Decorative Wall Plate Option 8
Fresh Air Damper Options (Manual and Motorized).
8
Fresh Air Intake Box Option. . . . . . . . . . . . . . . . . 8
Tamperproof Cabinet Option . . . . . . . . . . . . . . . . 8
Rear Cabinet Extension Option . . . . . . . . . . . . . . 8
Leveling Legs Option . . . . . . . . . . . . . . . . . . . . . . 9
Raised Sub-Bases and Extended-Width End Pock-
ets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Return Air Grille . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Factory Valve & Piping Packages . . . . . . . . . . . . 9
Control Valve Options. . . . . . . . . . . . . . . . . . 10
Unit Selection 11
Unit Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Basic design data . . . . . . . . . . . . . . . . . . . . . . . 11
Unit size . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Performance Data 12
Heating Performance - Hot Water Coil . . . . . . . 12
Electric Heat Data 13
Air Volume Capacity Data 14
Motor Electrical Data 15
Physical Data 16
Unit Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Unit Dimensions 17
Decorative Wall Plate Dimensions. . . . . . . . . . . 21
Fresh Air Intake Box Dimensions . . . . . . . . . . . 21
Engineering Guide Specification 22
McQuay ThinLine 3G unit heater. . . . . . . . . . . . 22
Performance. . . . . . . . . . . . . . . . . . . . . . . . . 22
Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Supply Fan . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Filter Section. . . . . . . . . . . . . . . . . . . . . . . . . 22
Fresh Air Damper. . . . . . . . . . . . . . . . . . . . . 22
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Valve/Piping Packages. . . . . . . . . . . . . . . . . 23
Other Available Options . . . . . . . . . . . . . . . . 24
Nomenclature and Certification
FH V S - 1 02 A
Unit Type
FC = Fan Coil
FH = Cabinet Unit Heater
Unit Configuration
V= Vertical
W = Wall Hung
I = Inverted Wall Hung
Cabinet Type
C = Cabinet (Flat Top)
S = Slope Top
H = Hideaway
Voltage
A = 115/60/1
E = 208-230/60/1
J = 265-277/60/1
Unit Size
02 = 200 CFM
03 = 300 CFM
04 = 400 CFM
06 = 600 CFM
08 = 800 CFM
10 = 1000 CFM
12 = 1200 CFM
Design Series
ThinLine 3G Vertical Cabinet Unit Heaters
Figure 1: Nomenclature
Nomenclature and Certification
ARI Certification Agency Listed
Standard size units certified in accordance
with the Room Fan-Coil Unit certification
program, which is based on ARI Standard
All standard units
All Canadian units
440.
McQuay Catalog 723 3
Features and Benefits
Multiple Control Options
• From 3-speed switch to DDC interface board
• Remote or unit-mounted
• 3-speed or staged fan
Multiple
Configurations
• Flat top
• Slope top
• Hideaway
• Wall mounted
• Inverted
Multiple Coil Options
• 2, 3 or 4-row main coil
• Electric heat option
Multiple Grille Options
• Stamped and multi-
directional outlet grilles
• Return grille option
Diverse, Flexible Valve
& Piping Packages
• Factory-mounted, wired and
tested
• Or, factory-assembled and
shipped loose
• Normally closed or open, on/
off or modulating valves
Easily Removed Motor Assembly
• For easy maintenance and service
Features and Benefits
The ThinLine™ 3G Advantage
New ThinLine 3G vertical unit heaters combine the features
most desired in a unit heater by building owners, specifying
engineers and contractors alike. The result is a new, third
generation unit heater design that meets the needs of all three.
For building owners
For building owners, ThinLine 3G unit heaters offer quiet
operation. They fully comply with ASHRAE 62.1-2004
standards for high indoor air quality. And they offer a range of
control options that can enhance occupant comfort and reduce
operating costs. These units are also easy to maintain, with
easy access to filters, fan motors and control systems.
For specifying engineers
For specifying engineers, ThinLine 3G unit heaters provide
great versatility. Five different vertical models are available
with multiple arrangements and configurations.
Figure 2: Unit Features
• Coil options include two, three, and four-row hot water
coils. An electric heat option is also available for use when
hot water is shut down for the season.
• Multiple control options range from a simple fan speed
switch to a DDC interface board that can tie into most
building automation systems. Non-communicating or
communicating control options for LonTalk and BacNet will
be available soon. Contact your McQuay representative for
details.
• Grille options include multi-directional outlet grilles which
can be rotated for discharge in four different directions.
Stamped inlet and outlet grilles are available. Slope-top and
inverted vertical cabinet units are also available.
• Appearance options including four cabinet colors, three
grille colors, painted recess flanges, aluminum wall boxes
and painted Decorative Wall Plate panels. Rear cabinet
extensions are available in 4 and 8-inch depths. An 8-inch
(20 cm) extended end pocket is available on the piping end
of cabinet style units. Key-operated, locking access doors
are available to prevent nuisance tampering with units and/
or controls. Leveling feet are also available.
4 McQuay Catalog 723
Features and Benefits
For contractors
For contractors, ThinLine 3G unit heaters feature Quick Ship
options for fast delivery and a number of features that make
installation fast and simple.
• Factory-mounted, wired and tested valve and piping
packages for quick hookup to the building piping to reduce
installation time. Packages can also be shipped loose with
the unit.
• Factory-mounted and tested controls minimize field setup.
Depending on the option requested, controls can be wired
with a 24 VAC transformer to provide a single-source power
connection to the unit. Several options are available for unit
or wall mounted thermostats and sensors. All wall-mounted
thermostat and zone sensors require only low-voltage
control wiring from the device to the unit control box.
• Easy, end-panel removal for hookup of electrical and piping
connections minimizes field-labor time and cost.
• End compartment panels can be removed for installation and
service without removing the front panel covering the fan
blower section. This means that airflow through the filter
and coil is not jeopardized for taking temperature and
performance readings.
• The fan deck and motor assembly is easily removed, when
required, for service.
McQuay Catalog 723 5
Options and Accessories
Options and Accessories
Control Options
Manual 4-Position Fan Switch
This four-position fan switch (Off, High,
Med, Low) option is available remotemounted. It operates on low-voltage or
line-voltage power and can be provided
with a factory-mounted, low-voltage DDC
interface board, which contains 3-24 volt
relays with line voltage contactors and
terminal connections. The transformer is
factory-installed and wired.
Sequence of operation
• Off: Fan is turned off. The two-position, motorized fresh-air
damper, when supplied, is closed.
• High, Medium, Low: Fan runs continuously at the selected
speed. The two-position, motorized fresh-air damper, when
supplied, is opened.
Unit-Mounted, Mechanical Thermostat With 4-Position Fan Switch
This unit-mounted
option combines the
four-position fan switch
described above with a
mechanical thermostat.
Sequence of operation
• Fan Switch
• Off: Fan is turned
off. The twoposition, motorized fresh-air
damper, when
supplied, is closed.
• High, Medium, Low: Fan runs continuously at the
selected speed. The two-position, motorized fresh-air
damper, when supplied, is opened.
• Thermostat
• Cycles the valve(s) open or closed on demand based on
occupant-desired level.
Table 1. For more information, refer to the McQuay
publication ED 18513.
MT155 Thermostat
The MT155 series thermostat provides on-off control for lowvoltage or line-voltage valves and fan motors. It is remote-wall
mounted. Options include three-speed fan control for
continuous or cycling fan operation.
Figure 3: MT155 Thermostats
Three standard control options are available:
• On-off fan cycle operation only: The thermostat cycles the
fan from the manually selected fan speed (high, medium or
low) to off.
• Continuous fan and on-off valve cycle operation: The
thermostat cycles the valves on and off. The fan runs
continuously at the manually selected fan speed.
• On-off fan and on-off valve cycle operation: The thermostat
cycles the fan from the manually selected fan speed to off
and it cycles the valves on and off.
When the system switch is in the off position, the unit heater
system including the fan is shut off.
MT158 and MT168 Thermostat-Controllers with Digital Display
Series MT158 and MT168 microprocessor-based thermostatcontrollers combine a proportional integral control algorithm
with adaptive logic. They can be unit-mounted or remote-wall
mounted.
Figure 4: MT158 and MT168 Thermostats
Digital Thermostats
McQuay offers a broad
range of unit-mounted and
remote, wall-mounted
digital thermostats with
the capability to control
on-off, 3-wire and
proportional modulating
valves, and normally
closed or normally open
actuator valves. See
6 McQuay Catalog 723
Heating outputs for the MT158 are individually configurable
for three-wire floating control valves or on/off valves in the
normally open or normally closed modes.
Heating outputs for the MT168 provide 0-10 Vdc or 4-20 mA
The integrated, three-speed fan control switch is line voltage to
Options and Accessories
allow direct connection to the fan motors. Remote setback
capability is available from a time clock or facility
management system. Features include a Fahrenheit or Celsius
digital display.
Two standard control options are available:
• Continuous fan and modulating (or on-off) valve operation.
The fan runs continuously at the manually selected fan speed
(high, medium or low). The controller modulates the valves
or, on the MT158, dip-switches can be set to cycle the valves
on and off.
• On-off fan cycle operation and modulating (or on-off) valve
operation. The controller cycles the fan from the manually
selected fan speed to off. The controller modulates the
valves or, on the MT158, dip-switches can be set to cycle the
valves on and off.
Table 1: ThinLine 3G Thermostat Offerings
Thermostat Type Mounting
Manual three speed fan switch Remote
Single-pull, double-throw heating/cooling thermostat
with manual heat-off-cool system switch and manual
three-speed fan switch
Single-pull, double-throw thermostat only Unit
Two-pole dead-band auto-changeover thermostat with
manual on-off system switch and manual three-speed
fan switch
Two-pole dead-band auto-changeover thermostat Unit
Digital thermostat 24 vac/120-277 vac with 3-speed fan
control (continuous or fan cycle)
Digital thermostat 24 vac/120-277 vac with staged fan
(continuous or fan cycle)
Digital thermostat with on/off or three-wire floating
valve control.
Digital thermostat with on/off or three-wire floating
valve control, and manual three-speed fan switch
Digital thermostat with modulating valve control
Digital thermostat with modulating-valve control, and
three speed fan switch
Unit
Unit
Remote
Remote
Unit or
Remote
Unit or
Remote
Unit or
Remote
Unit or
Remote
DDC Interface Board
The low-voltage,
DDC interface
board is used with
any remote (wall
mounted) McQuay
thermostat or
control. It can also
be used with a BAS
(Building
Automation
System) control
where low voltage
is needed to operate
the unit heater.
The DDC interface board includes:
• Three 24-volt relays with line-voltage contactors to operate
the fan motor speeds.
• Terminal connections for interfacing to:
• An optional wall-mounted thermostat.
• Low-voltage actuators for cooling valves.
• A return air sensor.
• A factory-wired and installed transformer.
Customer-Supplied Controls
Your McQuay representative can work with engineers and/or
contractors to factory install and wire other manufacturers’
DDC controllers in one of the end pockets of the unit heater.
Contact your local McQuay representative for assistance with
your specific project.
McQuay Catalog 723 7
Options and Accessories
Decorative Wall Plate Option
Decorative wall plates have rounded corners and an antique ivory
finish for an attractive appearance. Other colors are available upon
request. See Figure 10, page 21 for dimensional data.
Fresh Air Damper Options (Manual and Motorized)
A fresh air intake that will provide up to 25% fresh air with insect air
screen and damper blade, can be ordered either factory installed or as
a field installed kit. The kit consists of an intake with damper blade
and insect screen. The damper may be manually controlled through
the return air opening or with an optional field-installed damper
motor. If freezing air temperatures are expected, the damper must be
closed or outside air must be tempered before entering the unit.
Tamperproof Cabinet Option
This option can be factory- or field-installed on cabinet units to
prevent access to unit controls and easy removal of cabinet panels. It
includes a key lock access door to unit controls and torx head screws
for cabinet panels.
Rear Cabinet Extension Option
This kit is available for applications where additional depth is
necessary. Four-inch extension kits are available. Other
extension depths are available as a special. Contact your
McQuay Representative for details. This kit is not designed to
be an air duct or outside air plenum.
Fresh Air Intake Box Option
Fabricated of aluminum with weep holes and a double set of louvers
in series to prevent moisture draw-through. This is used with a fresh
air damper and is mounted in an exterior wall.See Figure 11,
page 21 for dimensional data
Some common applications for the rear cabinet extension
include:
• Allow additional depth for appearance of unit.
• Allow additional clearance for cross-over piping and
connections.
• Extend the discharge grille past drapery or wall hangings.
• Cover floor covering terminations in remodeling projects.
• Allow for piping entry through the side panels of the unit.
8 McQuay Catalog 723
Options and Accessories
Front View
4.2”
[107 mm]
End View
4.9” [125 mm]
8.4”
[214 mm]
1.3” [33 mm]
Supply
Return
Note: RIght-hand connections shown. Left-hand
connection distances are the same.
Distances to connections from chassis are
from unit mounting holes. Distances may
vary slightly from given values.
Leveling Legs Option
Field or factory-installed kits are available with 0” to 1" adjustment
for positive leveling of floor-mounted units.
Raised Sub-Bases and ExtendedWidth End Pockets
Numerous piping packages are available to match your
configuration. Additional components can be added to meet
your exact requirements, including P/T ports, unions, and
flexible, stainless steel hoses.
Figure 5: Hook Up Locations - Factory-Installed Packages
Extended-height subbases and extended end pockets are
available as a special. Contact your McQuay Representative
for more information.
Note: Standard end pockets on McQuay units can accomodate
most requirements. Therefore, extended pockets are
seldom needed.
Return Air Grille
A stamped-steel, return air grille is available as an option,
factory or field-installed.
Factory Valve & Piping Packages
Factory valve and piping packages are available with either
right or left hand connections. Packages can be either factoryinstalled or factory-assembled and shipped loose with the unit.
Units are also available without a valve and piping package in
either a right-hand or left-hand configuration. All packages are
fully leak tested.
Factory-installed packages are sweated to the coil and wired to
the unit control box or DDC. Hot water pipes are the only field
connections required. Piping is 1/2” nominal copper (5/8”
OD).
Pre-determined field connection points are located for easy
access. See Figure 5 for connection locations. The installing
contractor can pre-pipe the building water connections before
the units arrive on the jobsite. A label clearly identifies water
connection points on every unit.
McQuay Catalog 723 9
Shut-off Only Packages
Shut-off only piping packages provide interconnecting copper
piping and shut-off ball valves for easily connecting supply
and return lines to the unit.Coils on all units have an integral
venting valve.
Basic Packages
Basic valve and piping packages add control valves to the
Shut-off Only package. All McQuay control valves are
factory-mounted in the supply water pipe. See Control Valve
Options‚ page 10 for more information on the variety of
control valves available.
Enhanced Packages
Enhanced valve and piping packages replace the ball valve on
the Basic package’s supply water pipe with a manual circuit
setter, also known as a manual flow control valve. The circuit
setter acts as both a flow-setting device and a shut-off valve. It
allows water flow through the unit heater to be set quickly and
accurately.
P/T ports are included, which are used to measure the
temperature or pressure drop across the valve. This pressure
Options and Accessories
drop can be compared to factory-supplied tables that relate the
pressure drop to a specific flow rate. The valve also has a
memory stop so that the correct setting can be found quickly.
Premium Packages
Premium valve and piping packages replace the Enhanced
package’s manual circuit setter with an automatic circuit setter.
The circuit setter includes a cartridge within the valve body
that is sized to allow a specific flow rate through the coil. This
valve sets flow through the coil without any action required by
a system piping balancer.
Deluxe Packages
Deluxe valve and piping packages add a strainer to the
Premium package. The strainer is attached to the supply water
pipe at the coil connections. The strainer body is cast brass
construction with a stainless steel mesh that is easily removed
for cleaning. The strainer is available with or without an
optional draining (blow-off) valve.
Control Valve Options
Except for Shut-off Only packages, all valve and piping
packages include control valves for controlling water flow. All
McQuay control valves are factory-assembled and mounted in
the supply water pipe downstream of the coil. Several options
are available as follows.
Two-Way/Two-Position Valves
These valves will be either fully open or fully closed in
response to a line voltage (115 or 265-277 VAC) or a 24 VAC
signal from the McQuay thermostat or controller. Some means
of relieving pump head pressure should be accounted for when
two-way valves are selected. Normally open or normally
closed valves are available. Both are spring-return.
Three-Way, Two-Position Valves
These valves either allow full water flow through the coil or
divert the flow through a bypass line. The valves respond to a
line voltage (115 or 265-277 VAC) or to a 24 VAC signal from
the McQuay thermostat or controller. All standard three-way
valves come with a fixed-balance orifice in the bypass line to
compensate for flow balancing in the bypass position,
eliminating the need for an additional balancing valve.
Normally open or normally closed valves are available.
Two-Way Modulating Valves
These valves modulate the water flow through the coil in
response to a signal from the McQuay thermostat or controller.
All standard McQuay modulating valves are three-wire
floating point equal percentage valves. Zero to 10 VDC
proportional valves are also available as a special option upon
request. The modulating valves are factory mounted in the
supply water pipe upstream of the coil.
Three-Way Modulating Valves
These valves modulate the water flow through the coil in
response to a signal from the McQuay thermostat or controller.
Three-way valves allow water that is directed through the coil
to mix with water that is directed through the bypass line. This
mixture exits through the leaving water pipe. All modulating
valves are three-wire, floating-point equal percentage valves.
The modulating valves are factory mounted in the supply
water pipe upstream of the coil.
Selecting the Correct Size Modulating Valve
McQuay SelectTools™ software automatically selects the best
modulating valve size for the unit and coil being considered.
By combining the ARI performance data, the coil flow rate
and the DP across the water coil, the water coil Cv is
calculated and the best matching modulating port size is
selected.
10 McQuay Catalog 723
Unit Selection
Unit Selection
Unit Selection
The achievement of an efficient unit heater system is
dependent upon accurate system design and proper equipment
selection. Variations, limitations and control of unit heater
systems, design conditions and design load calculations are not
described in detail in this catalog. More detailed information
may be found in the ASHRAE Guide. This catalog contains
ARI certified ratings and application ratings for ThinLine 3G
unit heaters from which the design engineer can make initial
unit selections to meet the requirements of the system.
The mechanical system designer must select the unit types best
suited to the overall system before the actual unit sizes can be
determined. The factors that generally influence this decision
are intended building usage, building layout, architectural and
aesthetic values, economics, geographical location, and type of
maintenance service available. The general results may be a
mixture of various unit types within a given system. McQuay
International manufactures a unit heater to meet your every
need including ThinLine, HiLine and Large Capacity models.
For McQuay product information, please go to
www.mcquay.com.
Basic design data
Prior to selecting the individual unit sizes, the design engineer
must fix or determine the following factors:
• Total and sensible heat gains and losses of the area to be
served.
• Ventilation air.
• Properties of the heating medium.
• Available electric power service.
• Any special design requirements of the building or system.
Unit size
The capacity ratings presented in this catalog are provided for
initial unit selection only. Water heating capacities, unit air
flow, static pressure and glycol solutions are all incorporated
into the program to provide the best possible selection. Consult
your McQuay representative for a selection tailored to your
application.
Unit sizes for the ideal system should be selected by
calculating the peak load requirements due to unusually high
occupancy or severe climatic conditions and with fan
operating at high speed. Ordinary day to day cooling and
heating requirements are then achieved at low and medium
speeds.
The initial unit selection should be checked for air volume in
the design system and the cooling capacities checked at the
actual operating conditions. While units selected on the basis
of sensible load will generally meet the total load, total load
should be checked in all cases.
The unit size is generally selected on the basis of matching the
heating capacity of the unit with the calculated requirements
when operating at high speed.
McQuay Catalog 723 11
Performance Data
Performance Data
Heating Performance - Hot Water Coil
All performance measured on high speed tap, 115 V, zero ESP,
with a throwaway filter. Heating performance is based on 70°F
(21°C) entering air temperature, 180°F (82°C) entering hot
water temperature with a 30°F (17°C) T.
Table 2: Heating performance
Heating Performance
Unit
Size
Coil
Rows
2 Row 218 14.1 (4.1) 0.128 (0.067) 0.9 (0.06) 0.3 (0.9)
3 Row 209 17.2 (5.0) 0.156 (0.082) 1.2 (0.08) 0.5 (1.5)
02
4 Row 200 19.2 (5.6) 0.175 (0.092) 1.2 (0.08) 0.6 (1.8)
2 Row 299 19.8 (5.8) 0.180 (0.095) 1.1 (0.07) 0.4 (1.2)
3 Row 291 24.4 (7.2) 0.222 (0.118) 1.5 (0.09) 0.5 (1.5)
03
4 Row 265 27.2 (8.0) 0.247 (0.131) 1.9 (0.12) 1.5 (4.5)
2 Row 398 28.3 (8.3) 0.257 (0.136) 1.7 (0.11) 1.0 (3.0)
3 Row 385 34.0 (10.0) 0.309 (0.164) 2.2 (0.14) 1.3 (3.9)
04
4 Row 374 38.9 (11.4) 0.354 (0.187) 2.9 (0.18) 3.4 (10.2)
2 Row 602 41.0 (12.0) 0.373 (0.196) 2.9 (0.18) 4.4 (13.1)
3 Row 565 47.1 (13.8) 0.428 (0.226) 3.7 (0.23) 5.2 (15.5)
06
4 Row 554 52.6 (15.4) 0.478 (0.252) 4.6 (0.29) 9.0 (26.9)
2 Row 675 50.3 (14.7) 0.457 (0.241) 3.6 (0.23) 7.7 (23.0)
3 Row 656 58.7 (17.2) 0.534 (0.281) 4.5 (0.28) 8.0 (23.9)
08
4 Row 634 64.3 (18.8) 0.585 (0.308) 5.5 (0.35) 14.8 (44.2)
2 Row 831 62.4 (18.3) 0.567 (0.299) 4.4 (0.28) 6.8 (20.3)
3 Row 808 73.2 (21.5) 0.665 (0.352) 5.7 (0.36) 8.7 (26.0)
10
4 Row 795 80.8 (23.7) 0.735 (0.388) 6.7 (0.42) 11.1 (33.2)
2 Row 1118 78.3 (22.9) 0.712 (0.375) 5.6 (0.35) 12.5 (37.4)
3 Row 1059 95.4 (28.0) 0.867 (0.458) 7.1 (0.45) 15.5 (46.3)
12
4 Row 1022 103.8 (30.4) 0.944 (0.497) 8.3 (0.52) 18.3 (54.7)
SCFM
TMBh (TkW) Q/ITD
Gpm (L/
s)
WPD
FtofH
(kPa)
O
2
12 McQuay Catalog 723
Performance Data
Electric Heat Data
Table 3: Electric Heat kW*
Unit
Size
02
03
04
06
08
10
12
Note: *Electric heat MBh = (Heater kW) (3.413)
Unit
Vol tag e
115 0.5 1.0 1.5
230 0.5 1.0
277 0.5 1.0 1.5
208 0.5 0.9
115
230 1.0
277 1.0 1.5
208 0.9
115
230 1.0 1.5 2.0
277 1.0 1.5 2.0
208 0.9 1.4 1.8
115
230 1.5 2.0 2.5 3.0
277 1.5 2.0 2.5 3.0 4.0
208 1.4 1.8 2.3 2.7
115
230 2.0 2.5 3.0 4.0
277 2.0 2.5 3.0 4.0
208 1.8 2.3 2.7 3.6
115
230 2.5 3.0 4.0
277 2.5 3.0 4.0
208 2.3 2.7 3.6
115
230 3.0 4.0 5.0 6.0
277
208
1.0 1.5 2.0
1.0 1.5 2.0
1.5 2.0
2.0
kW
3.0 4.0 5.0 6.0
2.7 3.6 4.5 5.4
MCA (Minimum Circuit Ampacity) Calculations and MFS (Maximum Fuze Size) Calculations
HACR (Heating, Air-Conditioning and Refrigeration) type
circuit breakers are required in the branch circuit wiring for all
fan coils with electric heat.
Note: MCA ratings are based on the unit and electric heat
power supply having the same voltage. If the electric heat
power supply is different, a separate circuit breaker may be
required. Follow local codes.
Select a standard fuse size or HACR type circuit breaker equal
to the MCA. Standard Fuse Sizes are: 15, 20, 25, 30, 35, 40,
45, 50, 60 amps. Use the next larger standard size if the MCA
does not equal a standard size.
Heater Amps = (Heater kW x 1000)/Heater Voltage
Note: Use 120V heater voltage for 115V units. Use 240V
heater voltage for 230V units.
MCA = 1.25 x (heater amps + all motor FLAs)
MFS or HACR Type Circuit Breaker = (2.25 x Largest Motor
FLA) + Second Motor FLA + Heater Amps (If Applicable)
See Tab le 5 through Tab le 7 for motor FLAs.
McQuay Catalog 723 13
Performance Data
Air Volume Capacity Data
Air volumes shown in the table are measured at the motor
speeds indicated with 115v/60/1 electrical power, with a 1”
throwaway filter installed, and with a stamped discharge grill
Table 4: SCFM, 115/60/1 Motor (Factor 88%)
SCFM SCFM
Main
Unit
Size
Rows
02 2 Row None 214 197 167
3 Row None 204 190 161 3 Row None 654 576 456
4 Row None 197 183 159 4 Row None 632 562 450
03 2 Row None 296 264 211
3 Row None 292 256 205 3 Row None 807 696 536
4 Row None 283 253 206 4 Row None 789 680 523
04 2 Row None 380 330 261
3 Row None 365 325 250 3 Row None 1059 960 822
4 Row None 368 319 249 4 Row None 1025 930 803
06 2 Row None 600 524 421
3 Row None 559 483 373
4 Row None 554 486 409
Coil
Heating
Coil
Rows
Motor on
High
Speed
Motor on
Medium
Speed
Motor
on Low
Speed
on a vertical cabinet unit or a discharge duct collar on a
hideaway unit at approximately 0.10 inch of pressure drop.
Main
Unit
Size
Rows
2 Row None 668 585 465
08
2 Row None 831 712 548
10
2 Row None 1110 995 840
12
Coil
Heating
Coil
Rows
Motor on
High
Speed
Motor on
Medium
Speed
Motor
on Low
Speed
14 McQuay Catalog 723
Performance Data
Motor Electrical Data
Table 5: Electrical Data - Standard (Free Discharge) Motor - 2 Row Coil
Motor
Speed
High 0.49 53 1059 0.56 63 993 0.68 72 991 1.32 123 1122 1.20 129 1015 1.37 148 987 2.52 237 1123
Med 0.42 44 984 0.48 53 886 0.57 59 876 0.99 95 987 1.01 108 910 1.16 124 866 1.81 175 1013
115 V
Low 0.35 36 856 0.39 42 726 0.45 45 705 0.90 81 815 0.83 84 741 0.92 95 681 1.64 153 864
High 0.27 53 955 0.30 62 837 0.38 75 928 0.61 122 1102 0.77 154 1070 0.72 147 860 1.15 236 1113
Med 0.23 48 766 0.24 52 639 0.30 59 764 0.44 87 910 0.58 48 709 0.58 120 681 0.83 166 960
208 V
Low 0.19 39 561 0.19 42 485 0.25 49 611 0.36 65 691 0.50 39 504 0.45 93 533 0.70 127 708
High 0.27 57 1026 0.30 67 949 0.37 75 998 0.63 133 1124 0.80 180 1093 0.73 163 954 1.19 261 1131
Med 0.23 52 914 0.25 60 791 0.31 64 880 0.41 89 1011 0.57 131 1006 0.61 139 797 0.81 178 1021
230
Low 0.20 45 742 0.21 50 607 0.26 6 737 0.36 78 844 0.50 111 870 0.50 113 616 0.71 149 831
High 0.28 55 1026 0.29 61 931 0.34 77 917 0.47 117 1118 0.79 172 1097 0.65 149 906 0.95 246 1104
Med 0.20 49 915 0.21 44 778 0.27 64 771 0.34 85 986 0.56 133 1007 0.50 126 737 0.74 188 933
265 V
Low 0.16 41 758 0.16 43 597 0.20 46 609 0.30 69 836 0.47 114 882 0.38 99 594 0.63 152 737
High 0.29 57 1049 0.29 66 948 0.35 75 955 0.49 132 1125 0.81 183 1110 0.71 159 948 0.97 265 1115
Med 0.22 51 953 0.22 58 788 0.27 65 820 0.34 86 1018 0.57 139 1030 0.51 135 791 0.72 196 968
277 V
Low 0.16 44 827 0.17 47 625 0.21 56 682 0.30 72 890 0.47 120 924 0.39 108 638 0.64 159 793
Table 6: Electrical Data - Standard (Free Discharge) Motor - 3 Row Coil
Motor Size 2 Size 3 Size 4 Size 6 Size 8 Size 10 Size 12
Speed Amps Watts RPM Amps Watts RPM Amps Watts RPM Amps Watts RPM Amps Watts RPM Amps Watts RPM Amps Watts RPM
High 0.48 52 1067 0.55 62 1005 0.68 72 994 1.29 121 1120 1.20 129 1018 1.37 149 992 2.48 231 1127
Med 0.41 43 1007 0.48 53 899 0.57 59 876 1.01 96 976 1.01 108 915 1.15 124 871 1.76 169 1029
115 V
Low 0.34 35 889 0.39 42 722 0.45 45 700 0.89 80 783 0.83 84 749 0.91 95 689 1.60 149 895
High 0.26 52 962 0.29 62 847 0.38 75 931 0.60 120 1100 0.77 154 1073 0.72 148 865 1.13 230 1117
Med 0.22 46 784 0.24 52 648 0.30 59 764 0.45 88 900 0.58 48 713 0.57 119 685 0.81 160 975
208 V
Low 0.18 38 583 0.19 42 482 0.25 49 607 0.36 64 664 0.50 39 509 0.45 93 539 0.68 124 733
High 0.26 55 1034 0.29 66 960 0.37 75 1001 0.62 131 1122 0.80 179 1096 0.72 163 959 1.17 254 1135
Med 0.22 50 935 0.25 59 803 0.31 64 880 0.42 90 1000 0.57 130 1011 0.60 138 802 0.79 172 1037
230
Low 0.19 44 771 0.21 50 604 0.26 6 732 0.36 77 811 0.50 111 879 0.49 113 624 0.69 145 861
High 0.27 54 1034 0.28 61 942 0.34 77 920 0.46 115 1116 0.79 172 1100 0.65 150 91 1 0.93 240 1108
Med 0.20 47 936 0.21 44 789 0.27 64 771 0.35 86 975 0.56 133 1012 0.49 126 742 0.72 182 948
265 V
Low 0.16 41 787 0.17 44 594 0.20 46 605 0.30 68 803 0.47 114 891 0.38 99 601 0.61 148 763
High 0.28 56 1057 0.29 65 959 0.35 75 958 0.48 130 1123 0.81 183 1113 0.70 159 953 0.95 258 1119
Med 0.21 49 975 0.22 58 800 0.27 65 820 0.35 87 1007 0.57 139 1035 0.51 134 796 0.70 189 983
277 V
Low 0.16 43 859 0.17 48 622 0.21 56 677 0.30 71 855 0.47 120 933 0.39 108 646 0.62 155 821
Size 2 Size 3 Size 4 Size 6 Size 8 Size 10 Size 12
Amps Watts RPM Amps Watts RPM Amps Watts RPM Amps Watts RPM Amps Watts RPM Amps Watts RPM Amps Watts RPM
Table 7: Electrical Data - Standard (Free Discharge) Motor - 4 Row Coil
Motor Size 2 Size 3 Size 4 Size 6 Size 8 Size 10 Size 12
Speed Amps Watts RPM Amps Watts RPM Amps Watts RPM Amps Watts RPM Amps Watts RPM Amps Watts RPM Amps Watts RPM
High 0.48 52 1069 0.54 61 1019 0.68 71 1002 1.28 118 1127 1.17 126 1027 1.36 152 993 2.46 228 1131
Med 0.41 43 1007 0.47 52 923 0.57 59 890 0.93 88 1017 0.98 105 935 1.15 123 863 1.73 166 1036
115 V
Low 0.34 35 888 0.38 41 779 0.45 45 712 0.86 77 873 0.81 83 769 0.91 94 684 1.57 147 909
High 0.26 52 964 0.29 60 859 0.38 74 938 0.60 117 1107 0.75 150 1083 0.71 151 865 1.12 227 1121
Med 0.22 46 784 0.23 50 665 0.30 59 776 0.41 81 938 0.56 47 729 0.57 118 678 0.80 157 982
208 V
Low 0.18 38 582 0.19 41 520 0.25 49 617 0.35 62 740 0.48 39 523 0.45 92 535 0.67 122 744
High 0.26 55 1036 0.29 64 973 0.37 74 1009 0.62 128 1129 0.78 175 1106 0.72 166 959 1.16 251 1139
Med 0.22 50 935 0.24 58 824 0.31 64 894 0.39 83 1042 0.55 127 1034 0.60 137 795 0.78 169 1044
230
Low 0.19 44 770 0.20 49 652 0.26 6 745 0.35 74 904 0.49 110 903 0.49 112 619 0.68 143 874
High 0.27 54 1036 0.28 59 955 0.34 76 927 0.46 112 1123 0.77 167 1110 0.65 153 911 0.92 237 1112
Med 0.20 47 936 0.21 42 810 0.27 64 783 0.32 79 1016 0.55 130 1034 0.49 125 735 0.71 179 954
265 V
Low 0.16 40 786 0.16 43 641 0.20 46 615 0.29 65 895 0.45 113 915 0.37 98 597 0.60 146 775
High 0.28 56 1059 0.28 63 972 0.35 74 966 0.48 127 1130 0.79 178 1123 0.70 162 953 0.94 255 1123
Med 0.21 49 975 0.21 56 821 0.27 65 833 0.32 80 1049 0.55 136 1058 0.51 133 789 0.69 186 990
277 V
Low 0.16 42 858 0.17 46 671 0.21 56 689 0.29 68 953 0.46 119 959 0.39 106 641 0.61 153 834
McQuay Catalog 723 15
Physical Data
Physical Data
Unit Data
Table 8: Unit Data
02 03 04 06 08 10 12
Coil Data
Face Area, ft2 (cm2)
Fins/inch (cm) 12 [4.7] 12 [4.7] 12 [4.7] 12 [4.7] 12 [4.7] 12 [4.7] 12 [4.7]
Coil Dimensions
2-Row
L x D x H, in (cm
3-Row
L x D x H, in (cm
4-Row
L x D x H, in (cm
Volume, Gal (Liters)
2-Row 0.15 (0.6) 0.19 (0.7) 0.24 (0.9) 0.32 (1.2) 0.37 (1.4) 0.46 (1.7) 0.55 (2.1)
3-Row 0.20 (0.7) 0.26 (1.0) 0.32 (1.2) 0.45 (1.7) 0.52 (2.0) 0.64 (2.4) 0.77 (2.9)
4-Row 0.26 (1.0) 0.34 (1.3) 0.43 (1.6) 0.61 (2.3) 0.70 (2.6) 0.87 (3.3) 1.05 (4.0)
Fan/Motor Data
Fan Quantity 1 1 2 2 3 4 4
Size, Dia” x W” (cm) 6.26 x 6.3
Motor Quantity 1 1 1 1 2 2 2
Filter Data
Part Number 668332901 668332902 668332903 668332907 668332905 668332906 668332904
1” (25.4 cm) Media Throw-away Throw-away Throw-away Throw-away Throw-away Throw-away Throw-away
Quantity 1 1 1 1 2 2 2
L x D x H, in. (cm) 16 x 8.75 x 1
0.74 (685) 1.08 (1004) 1.43 (1323) 2.11 (1962) 2.46 (2281) 3.14 (2917) 3.83 (3559)
11.8 x 1.7 x 9
(30.0x4.4x22.9)
11.8 x 2.6 x 9
(30x6.6x22.9)
11.8 x 3.5 x 9
(30.0x8.8x22.9)
(15.9 x 16)
(40.6 x 22 x 2.5)
17.3 x 1.7 x 9
(43.9x4.4x22.9)
17.3 x 2.6 x 9
(43.9x6.6x22.9)
17.3 x 3.5 x 9
(43.9x8.8x22.9)
7.95 x 6.3
(20 x 16)
21.5 x 8.75 x 1
(54.6 x 22 x 2.5)
22.8 x 1.7 x 9
(57.9x4.4x22.9)
22.8 x 2.6 x 9
(57.9x6.6x22.9)
22.8 x 3.5 x 9
(57.9x8.8x22.9)
6.26 x 6.3
(15.9 x 16)
27 x 8.75 x 1
68.5 x 22 x 2.5
33.8 x 1.7 x 9
(85.9x4.4x22.9)
33.8 x 2.6 x 9
(85.9x6.6x22.9)
33.8 x 3.5 x 9
(85.9x8.8x22.9)
7.95 x 6.3
(20 x 16)
38 x 8.75 x 1
(96.5 x 22 x 2.5)
39.3x 1.7 x 9
(99.8x4.4x22.9)
39.3 x 2.6 x 9
(99.8x6.6x22.9)
39.3 x 3.5 x 9
(99.8x8.8x22.9)
6.26 x 6.3
(15.9 x 16)
21.7 x 8.75 x 1
(56.1 x 22 x 2.5)
50.2 x 1.7 x 9
(127.6x4.4x22.9)
50.2 x 2.6 x 9
(127.6x6.6x22.9)
50.2 x 3.5 x 9
(127.6x8.8x22.9)
6.26 x 6.3
(15.9 x 16)
27.2 x 8.75 x 1
(69.0 x 22 x 2.5)
61.3 x 1.7 x 9
(155.7x4.4x22.9)
61.3 x 2.6 x 9
(155.7x6.6x22.9)
61.3 x 3.5 x 9
(155.7x8.8x22.9)
7.95 x 6.3
(20 x 16)
32.7 x 8.75 x 1
(83.1 x 22 x 2.5)
Table 9: Approximate Shipping Weights - lbs (kg)*
Unit Type
FHVC,FHVS 84 (38) 95 (43) 108 (49) 131 (60) 152 (69) 177 (80) 202 (92)
FHVH, FHVI 55 (25) 63 (29) 74 (34) 91 (41) 110 (50) 129 (59) 149 (68)
Note: *Approximate shipping weights do not include valve packages or other options.
S02S03S04S06S08S10S12
Unit Size
16 McQuay Catalog 723
Unit Dimensions
A
B
F
FRONT VIEW
K
8.9
227
6.1
154
BACK VIEW
ELECTRICAL
CONTROL BOX
OPTIONAL
DISCONNECT
SWITCH
1.3
33.8
C
3.6
90.3
E
TOP VIEW
DISCHARGE GRILL
ELECTRICAL CONTROL
ACCESS DOOR
EE
BB
DD
GG
15.7
[399]
17.6
[447]
8.88.8
[224][224]
9.3
[236]
3.4 [86]
Figure 6: Dimensions: Flat Top unit heaters
Physical Data
Dimension
S02 S03 S04 S06 S08 S10 S12
inch mm inch mm inch mm inch mm inch mm inch mm inch mm
Unit Width A 35.0 889 40.5 1029 46.0 1168 57.0 1448 62.5 1588 73.5 1867 84.5 2146
Unit Height B 25.0 635 25.0 635 25.0 635 25.0 635 25.0 635 25.0 635 25.0 635
Unit Depth C 10.0 254 10.0 254 10.0 254 10.0 254 10.0 254 10.0 254 10.0 254
Discharge Grille - Width E 16.3 414 21.8 554 27.3 693 38.3 973 43.8 1113 54.8 1392 65.8 1671
Return Air Opening - Width F 16.2 411 21.7 551 27.2 691 38.2 970 43.7 1110 54.7 1389 65.7 1669
Floor to Bottom Mtg Hole K 5 127 5 127 5 127 5 127 5 127 5 127 5 127
Water Supply
Water Return
McQuay Catalog 723 17
BB 16.7 424 16.7 424 16.7 424 16.7 424 16.7 424 16.7 424 16.7 424
GG 7.8 198 7.8 198 7.8 198 7.8 198 7.8 198 7.8 198 7.8 198
DD 21 533 21 533 21 533 21 533 21 533 21 533 21 533
EE 1.1 28 1.1 28 1.1 28 1.1 28 1.1 28 1.1 28 1.1 28
Physical Data
A
B
F
FRONT VIEW
6.06
153.99
8.94
227.01
K
BACK VIEW
ELECTRICAL
CONTROL BOX
OPTIONAL
DISCONNECT
SWITCH
3.74
95.07
C
1.86
47.36
E
TOP VIEW
DISCHARGE
GRILL
ELECTRIC CONTROL
ACCESS DOOR
DD
EE
GG
BB
PRIMARY
15.7
[399]
17.6
[447]
8.8
8.8
[224][224]
9.3
[236]
3.4 [86]
Figure 7: Dimensions: Slope Top unit heaters
S02 S03 S04 S06 S08 S10 S12
Dimension
inch mm inch mm inch mm inch mm inch mm inch mm inch mm
Unit Width A 35.0 889 40.5 1029 46.0 1168 57.0 1448 62.5 1588 73.5 1867 84.5 2146
Unit Height B 27.6 701 27.6 701 27.6 701 27.6 701 27.6 701 27.6 701 27.6 701
Unit Depth C 10.0 254 10.0 254 10.0 254 10.0 254 10.0 254 10.0 254 10.0 254
Discharge Grille - Width E 16.3 414 21.8 554 27.3 693 38.3 973 43.8 1113 54.8 1392 65.8 1671
Return Air Opening - Width F 16.2 411 21.7 551 27.2 691 38.2 970 43.7 1110 54.7 1389 65.7 1669
Floor to Bottom Mtg Hole K 5 127 5 127 5 127 5 127 5 127 5 127 5 127
Water Supply
Water Return
BB 16.7 424 16.7 424 16.7 424 16.7 424 16.7 424 16.7 424 16.7 424
GG 7.8 198 7.8 198 7.8 198 7.8 198 7.8 198 7.8 198 7.8 198
DD 21 533 21 533 21 533 21 533 21 533 21 533 21 533
EE 1.1 28 1.1 28 1.1 28 1.1 28 1.1 28 1.1 28 1.1 28
18 McQuay Catalog 723
Figure 8: Dimensions: Hideaway, Front-Discharge unit heaters
E
5.4
138.2
F
1.0
26.6
H
G
FRONT VIEW
FRONT DISCHARGE
ELECTRIC
CONTROL BOX
OPTIONAL
DISCONNECT
SWITCH
T
T
K
8.9
227
6.1
154
BACK VIEW
A
C
TOP VIEW
N
PRIMARY
BB
DD
B
EE
GG
7.3
[185]
Physical Data
Unit Width A 18.8 475 24.3 617 29.8 757 40.8 1036 46.3 1176 57.3 1455 68.3 1735
Unit Height B 24.0 610 24.0 610 24.0 610 24.0 610 24.0 610 24.0 610 24.0 610
Unit Depth C 9.6 243 9.6 243 9.6 243 9.6 243 9.6 243 9.6 243 9.6 243
Discharge Grille - Width E 16.3 414 21.8 554 27.3 693 38.3 973 43.8 1113 54.8 1392 65.8 1671
Return Air Opening - Width F 16.2 411 21.7 551 27.2 691 38.2 970 43.7 1110 54.7 1389 65.7 1669
Floor to Bottom Mtg Hole K 5 127 5 127 5 127 5 127 5 127 5 127 5 127
Water Supply
Water Return
Dimension
S02 S03 S04 S06 S08 S10 S12
inch mm inch mm inch mm inch mm inch mm inch mm inch mm
BB 16.7 424 16.7 424 16.7 424 16.7 424 16.7 424 16.7 424 16.7 424
GG 7.8 198 7.8 198 7.8 198 7.8 198 7.8 198 7.8 198 7.8 198
DD 21 533 21 533 21 533 21 533 21 533 21 533 21 533
EE 1.1 28 1.1 28 1.1 28 1.1 28 1.1 28 1.1 28 1.1 28
McQuay Catalog 723 19
Physical Data
F
H
G
FRONT VIEW
ELECTRIC
CONTROL BOX
OPTIONAL
DISCONNECT
SWITCH
T
T
K
8.9
227
6.1
154
BACK VIEW
A
C
4.7
120.1
3.5
89.6
E
TOP VIEW
TOP DISCHARGE
N
PRIMARY
BB
DD
EE
GG
B
1.3
32.9
7.3
[185]
Figure 9: Dimensions: Hideaway, Top-Discharge unit heaters
Dimension
Unit Width A 18.8 475 24.3 617 29.8 757 40.8 1036 46.3 1176 57.3 1455 68.3 1735
Unit Height B 24.0 610 24.0 610 24.0 610 24.0 610 24.0 610 24.0 610 24.0 610
S02 S03 S04 S06 S08 S10 S12
inch mm inch mm inch mm inch mm inch mm inch mm inch mm
Unit Depth C 9.6 243 9.6 243 9.6 243 9.6 243 9.6 243 9.6 243 9.6 243
Discharge Grille - Width E 16.3 414 21.8 554 27.3 693 38.3 973 43.8 1113 54.8 1392 65.8 1671
Return Air Opening - Width F 16.2 411 21.7 551 27.2 691 38.2 970 43.7 1110 54.7 1389 65.7 1669
Floor to Bottom Mtg Hole K 5 127 5 127 5 127 5 127 5 127 5 127 5 127
Water Supply
Water Return
BB 16.7 424 16.7 424 16.7 424 16.7 424 16.7 424 16.7 424 16.7 424
GG 7.8 198 7.8 198 7.8 198 7.8 198 7.8 198 7.8 198 7.8 198
DD 21 533 21 533 21 533 21 533 21 533 21 533 21 533
EE 1.1 28 1.1 28 1.1 28 1.1 28 1.1 28 1.1 28 1.1 28
20 McQuay Catalog 723
Decorative Wall Plate Dimensions
Figure 10: Wall plate dimensions and kit part numbers
Unit
Size
Inches (mm) Kit Part Number
Wall Plate
Recommended
Wall Opening
Front
Discharge
Top
Discharge
02
37.25 x 26.5
(946 x 673)
34 x 23
(864 x 584)
668114901 668114908
03
42.75 x 26.5
(1086 x 673)
40 x23
(1016 x 584)
668114902 668114909
04
48.25 x 26.5
(1226 x 673)
45 x 23
(1143 x 584)
668114903 668114910
06
59.25 x 26.5
(1505 x 673)
56 x 23
(1422 x 584)
668114904 668114911
08
64.75 x 26.5
(1645 x 673)
62 x 23
(1575 x 584)
668114905 668114912
10
75.75 x 26.5
(1924 x 673)
72 x 23
(1828 x 584)
668114906 668114913
12
86.75 x 26.5
(2203 x 673)
84 x 23
(2134 x 584)
668114907 668114914
Access doors on
both sides of
wall plate
Discharge grille
(front discharge
units)
Intake grille
Note: Wall plate is designed for use with ThinLine vertical
hideaway units mounted a minimum of 1.5 inches
(38 mm) above the floor. Wall plates for Size 08, 10
and 12 units are in two sections. For installation
instructions, see McQuay IM 1022.
STYLE
DIMENSIONS (INCHES)
ABC
2 BRICK X 2 BRICK 163⁄
4
43⁄
4
33⁄
4
4 BRICK X 2 BRICK 331⁄
2
43⁄
4
33⁄
4
ALL DIMENSIONS APPROXIMATE.
CERTIFIED DRAWINGS AVAILABLE ON REQUEST.
Fresh Air Intake Box Dimensions
Physical Data
Figure 11: Fresh Air Intake Box Dimensions
McQuay Catalog 723 21
Engineering Guide Specification
Engineering Guide Specification
McQuay ThinLine 3G unit heater
McQuay ThinLine 3G Vertical -floor type and wall/hideaway
type unit heaters are furnished as a vertical blow-through with
a coil used primarily for heating only.
Performance
Unit capacities are certified under Industry Room Fan-Coil Air
Conditioner Certification Program in accordance with ARI
Standard 440-97. All standard units are ETL listed in the
United States and Canada and comply with NFPA 90A
requirements.
Coils
All hot water coils are first leak tested at 400 psig (2760 kPa)
then re-tested at 300 psig (690 kPa) after all final piping
connections are made, including valve/piping packages.
Maximum coil working pressure is 300 psig (2,069 kPa).
Maximum entering water temperature is 200°F (93°C). Tubes
and u-bends are 3/8" (10 mm) OD copper. Fins are aluminum
and are mechanically bonded to the copper tubes. Coil stubouts are 5/8" (16 mm) OD copper tubing. Piping connections
are expanded to accept standard copper tubing 5/8" (16 mm)
OD. Water coil fins have full drawn collars to provide a
continuous surface cover over the entire tube for maximum
heat transfer. Seamless copper tubes are mechanically
expanded into the fins to provide a continuous primary-tosecondary compression bond over the entire finned length for
maximum heat transfer rates.
Water coils are provided with headers of seamless copper
tubing with intruded tube holes to permit expansion and
contraction without creating undue stress or strain. Coil casing
are constructed of galvanized steel. Coil connections are
copper sweat connections with connection size to be
determined by manufacturer based upon the most efficient coil
circuiting. Vent and drain connections are furnish soldered and
installed on the heating coil by the coil connection. Vent
connections are provided at the highest point to ensure proper
venting. Drain connections are at the lowest point.
Heating coils are available with 2, 3 or 4 rows. Hot water
maximum working pressure is 300 psig (2,069 kPa), and the
maximum entering water temperature is 200°F (93°C). The
steam coil maximum working pressure is 15 psig (103 kPa).
Electric Heating Coils
Auxiliary electric heating coil can be provided as the total
source of heat when the boiler is down. The electric heat coils
are located in the preheat position, and are the open-wire type.
The electric heat option is available to operate at the same
voltage as the unit or with a separate power supply voltage to
reduce amperage consumption. Single-power connection is
provided when unit and electric heat is the same voltage. A
second power connection must be used when the fan coil and
electric heat have different voltages. All standard electric heat
coils are ETL listed and interlocked with the fan motor switch.
Therefore, electric heat operation is possible only when the fan
is running. A unit-mounted magnetic contactor is supplied on
all voltages. High temperature cutouts with automatic reset and
another one with manual reset must be provided as an integral
part of the elements to de-energize the electric heat in the event
of an overheat condition.
Supply Fan
Fan are dynamically balanced, forward curved, double-width
centrifugal type constructed of 18 gauge galvanized steel for
corrosion resistance. Fan housing construction is formed sheet
metal.
Motor
Supply fans are provided with permanent split-capacitor
motors, high efficiency, with 3 speed tap as minimum and are
run-tested in the assembled unit and permanently lubricated.
All motors are UL and CSA listed and have integral thermal
overload protection with a maximum ambient operating
temperature of 104°F. Motors are capable of starting at 80
percent of rated voltage and operating at 90 percent of rated
voltage on all speed settings. Motors can operate up to 10
percent over-voltage. Motor wires include a quick-disconnect
motor plug for easy removability.
Disconnect Switch
A unit-mounted disconnect switch is available as a standard
option on all units.
Filter Section
Filters are 1" (25 mm) throwaway type. They are concealed
from sight and easily removable. Other filter types can be
provided upon request.
Fresh Air Damper
A fresh air opening with a damper is available as a factoryinstalled or field-installed option. Dampers are constructed of
18-gage steel. Fresh air is sealed off with gasket material when
the damper is set in the closed position. The fresh air damper
assembly includes a cleanable, fine wire mesh insect screen
Damper assembly is located in the unit sub-base below the unit
filter, allowing fresh air to be filtered and mixed with the
return air.
The manual damper is field-adjustable to allow from zero to
25% fresh air. The manual fresh air damper can also be
provided with an automatic, two-position spring return
actuator.
Controls
All McQuay Vertical ThinLine 3G cabinet unit heaters are
available as a basic unit with no controls or can be provided
22 McQuay Catalog 723
Engineering Guide Specification
with various unit-mounted or wall-mounted thermostats and
controls.
• Unit-mounted, dial-type thermostat, integrated with a 4-
position, 3-speed fan switch and a manual or automatic
system changeover switch. The manual changeover switch
allows the user to change from hot water heat to electric
heat, when provided. The fan runs continuously at the
manually selected fan speed: high, medium or low.
• Digital display, microprocessor-based, thermostat-controller
that supplies 24VAC output control to valves and motorized
dampers (when available). The use of an advanced
proportional integral (PI) algorithm allows precise control of
zone comfort under varying operational and environmental
conditions. It allows the fan to run continuously at the
manually selected fan speed (high, medium or low) and
cycles the cooling or heating valve(s) on and off as required
to meet the thermostat set point temperature. Manual or
automatic changeover options are available as well as a
remote setback capability from a time clock or facility
management system. Features include a Fahrenheit or
Celsius digital display and a built-in purge cycle which
assists the controller to determine if the hydronic system is
supplying hot water or not. With factory-installed valve
packages and with controls, it eliminates the need for an
inefficient bleed or bypass line. Digital display thermostats
are available to be used with on-off, 3 wire floating and 0-10
vdc or 4-20ma proportional actuator valves.
• Unit-mounted DDC interface board to be used for remote
thermostat, controller or facility management system.
Wall (remote) mounted thermostat options
To facilitate wall-mounted (remote) options, all vertical units
are provided with a DDC, low-voltage interface board to
accommodate a low-voltage thermostat to control the unit. The
interface board / j-box has three 24-volt relays, single point
power entry, terminal connection and transformer to control
the fan motor, 24 volt actuators, valves.
Remote mounted controls and switches
4P-3SP switch: Manual 4 position-3 Speed Rotary Fan Switch.
The Vertical mounted, manual rotary 4 position - three-speed
fan switch is a simple OFF-HI-MED-LO fan controls which
allows fan mode selection. This switch can be applied for
usage directly connected to the fan motor to operate on line
voltage.
of fan speed (Hi-MED-L0). This switch can be applied for
usage with line voltage, directly connected to the fan motor or
used as low-voltage through the interface board and j-box.
MTA170 and MTB170 microprocessor digital display
thermostat is a stand-alone digital controller that supplies relay
control of heating, outside air, and up to three fan speeds. The
thermostat's configuration can supply standard (continuous or
cycling) fan, staged fan, and fan coil operation. Energy saving
features include temperature range limit adjustment, staged fan
operation, occupancy detection, and setback control.
MTA170 fan speed is determined by manual selection of HI,
MED, or LO. On MTB170 the fan speed is configured for
staged fan and does not have speed selection available.
MT 158 and MT 168 Digital display microprocessor-based
thermostat-controller that supplies low voltage output control
to valves and motorized dampers (when available). The use of
an advanced proportional integral (PI) algorithm allows
precise control of zone comfort under varying operational and
environmental conditions. The digital display, with easy-to-use
adjustment buttons, allows convenient access to current zone
temperature, set point temperature and operating mode.
Optional manual or automatic changeover, setback capability
from a time clock or facility management system and auxiliary
heat functions are available, on selected models to adapt to the
different application requirements. It includes a fan switch
with Off, Hi, Med and Low speed selections. Features include
a Fahrenheit or Celsius digital display and a built-in purge
cycle which assists the controller to determine if the hydronic
system is supplying hot water or not. With factory-installed
valve packages, it eliminates the need to have the inefficient
bleed or bypass line. Digital display thermostats are available
to be used with on-off, 3 wire floating and 0-10 vdc or 4-20ma
proportional actuator valves, either N.O. or N.C. valves.
MTA and MTB 158 thermostats are designed to control OnOff, N.O. and N.C valves, relays and three wire floating
valves. Through the dip switches, the thermostat can be
configured to work with low voltage On-Off or 3 wire floating
valves.
MT168 thermostats are designed to control 0-10 VDC/4-0 mA
valves. These units may include a fan switch with one or more
is shipped with all dip
fan speed selections. The thermostat
switches in the "ON" (closed) position. And the damper output
(when utilized) is ON when mode is AUTO, HEAT or COOL,
damper is OFF in set back.
MTE155 3-Speed Fan Switch with Manual On/Off switch:
Vertical mounted, with manual On/Off system switch and
manual 3 three-speed fan switch; a simple HI-MED-LO fan
controls which allows fan mode selection. This switch can be
applied for usage directly connected to the fan motor to
operate on line voltage or to be used as low-voltage through
the interface board and j-box.
MTB155: An ON-OFF system switch can be used to turn the
unit on and off. A separate fan switch allows manual selection
McQuay Catalog 723 23
Valve/Piping Packages
All piping packages are tested at 300 psig and re-tested once
integrated and soldered to the coil at 300 psig (690 kPa) The
maximum working pressure of the interconnecting piping is
300 psig (2,069 kPa). Piping packages are available in 16
different configurations with or without unions and/or cleanoff valves on the strainers. McQuay units can be provided with
valve/piping packages factory built and assembled. They can
Engineering Guide Specification
be furnished factory wired and shipped loose within the unit
for final field soldering.
Left or right hand coil connections are available.
Interconnecting piping refers to the copper piping which is
attached to the coil connections and to all other components
(i.e. control valves, shutoff valves, circuit setters, etc.) It is 1/
2" nominal (5/8" OD) copper pipe. Since manual air bleed is
part of the heating coil assembly, it is not called out within the
piping packages. The air vent can be upgraded to an auto air
bleed if desired.
Valve/Piping Packages - Placement and Configurations
Although McQuay has the capability to deviate from the preset of valve/piping packages to meet almost any customer
requirements, McQuay has set 6 standard categories consisting
of: Shut-Off ball valve only, Shut-Off Ball valve with
Strainers, Basic, Enhanced, Premium and Deluxe Valve
Packages.
• Shut-Off Ball Valves with memory stop on the supply and a
shut off ball valve on the return.
• Shut-Off Ball Valves with Strainer with memory stop on the
supply and with strainer on the return.
• Basic: 2-way or 3-way control valve (3-way valve with
bypass balancing restrictor) and shut off ball valve on the
supply, and shut off ball valve on the return.
• Enhanced: 2-way or 3-way control valve (3-way valve with
bypass balancing restrictor) and shut off ball valve with
memory stop and strainer on the supply, and shut off ball
valve with memory stop on the return.
• Premium: 2-way or 3-way control valve (3-way valve with
bypass balancing restrictor) and shut off ball valve and
strainer on the supply and manual circuit setter (flow
control) and shut off ball valve on the return.
• Deluxe: 2-way or 3-way control valve (3-way valve with
bypass balancing restrictor), and shut off ball valve and
strainer on the supply and auto-fixed flow (circuit setter)
control and shut off ball valve on the return.
All above valve/ping combinations packages are also available
with the following additional options:
• Unions on both supply and return; P/T ports on both supply
and return; strainer with clean-out draining valve; auto air
bleed ports; threaded connection at the supply and return
connection to allow stainless steel flexible hose connections.
• 12" or 18" stainless steel braided hoses.
Control valves
• Two-Way, Two-Position (On-Off) Control Valves are rated
for a close-off pressure of 38 psig. The valve actuator is
easily removable for service or replacement without the
need to remove the valve body from piping packages.
Normally closed and normally open, fail safe valves are
available. For heating coils, normally open valves are
available to allow them to remain open during a loss of
power. McQuay locates valves in the water supply pipe to
operate as mixing valves
• Three-Way, Two-Position (On-Off) Control Valves either
allow full water flow through the coil or divert the flow
through a bypass line. Normally close or open three-way,
two-position valves are rated for a maximum 38 psig (261
kPa) close off pressure across the valves. All standard threeway valves come with a fixed-balance orifice in the bypass
line to compensate for flow balancing in the bypass position,
eliminating the need for an additional balancing valve.
Valves are also available with a maximum close-off pressure
of 50 psig (345 kPa). The valve actuator is easily removable
for service without removing the valve body from piping.
Depending on the actuator chosen, the valves respond to a
line voltage (115, 208-230 or 265-277 VAC) or to a 24 VAC
signal from the McQuay thermostat or controller. Normally
open or normally closed valves are available.
• Two- way and Three Way Modulating Control Valves are
rated for a maximum close off pressure of 50 psig (345 kPa).
Two or three way modulating valves modulate the water
flow through the coil in response to a signal from the
McQuay thermostat or controller. Upon request, McQuay
has the capability to offer three-wire floating point equal
percentage valves or 0-10vdc proportional modulating
valves. The modulating valves are factory mounted in the
supply water pipe upstream of the coil.
Other Available Options
Tamperproof Locks
Key-operated locking access doors and/or panels help prevent
nuisance tampering with unit and/or controls.
Multi-Directional Discharge Grille
Multi-directional grilles are square and allows four different
discharge directions by rotating the grilles 90°. The multidirectional grille construction is available in oxford brown or
Cupola white with a 16° angle on the discharge louvers and
recessed into the discharge panel to prevent condensation from
forming on the grille exterior.
Stamped Grille Inlet / Outlet
Stamped grille is one single grille available on the discharge
and return air available on all cabinet units. The grilles have a
Oxford brown paint finish with 18-gage steel construction. The
louvers are formed at a 16° angle, and the discharge grilles are
recessed to prevent condensate formation on the surface of the
grille. As optional, cupola white can be provided upon request
Leveling Feet
Screw-in bolts and mounting assembly is used to level the unit
and is available on all vertical cabinet units. 1 inch adjustment
for positive leveling.
24 McQuay Catalog 723
Engineering Guide Specification
Rear Cabinet Extension
Cabinet extensions are available to increase the depth of the
vertical flat top and slope top units. The additional depth may
be required to provide a cavity for piping or electrical routing
behind the fan coil. The rear cabinet extension is also used
when there is a window sill or wall column that extends out
past the front of standard units depth. Extension are 18-gage
steel construction and have the same paint finish as the unit
and are available in depth of 4" and 8" with height and width
identical to the unit's dimensions. Other depths are available
upon request.
Fresh Air Aluminum Wall Boxes
An aluminum wall box with two sets of louvers is available for
field installation. It is placed in the outside wall of the building
for decorative purposes and to act as a rain shield to minimize
the potential of water coming into the unit. A field-supplied
duct or sleeve from the wall box to the unit fresh air opening is
required.
End Pockets for Valve/Piping Package
McQuay standard end pockets of 8-1/8" are already considered
as extended pocket and are large enough to fit the most
elaborate McQuay valve and piping and still provide sufficient
room for maintenance and serviceability. Over-extended end
pockets can be made available to cover already built-in
exposed piping or to meet specific retrofits.
McQuay Catalog 723 25
McQuay Training and Development
Now that you have made an investment in modern, efficien t McQuay equipment, its care should be a high priority.
For training information on all McQuay HVAC products, please visit us at www.mcquay.com and click on training,
or call 540-248-9646 and ask for the Training Department.
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 find your
local McQuay Representative, go to www.mcquay.com.
This document contains the most current product info rm a tio n as of this pr int ing . Fo r th e mo st up - to- d ate pro d uc t
information, please go to www.mcquay.com.
© 2009 McQuay International • www.mcquay.com • 800-432-1342 08/09
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