McQuay HSS User Manual
HiLine™ Vertical Stacking
Fan-coil Units
Type HSS & KZZ
Catalog 770-14
ARI 440 CUL Listed
Contents
Application flexibility ...............................................................................................................................................................2
McQuay HiLine™ fan-coil units ..............................................................................................................................................2
Installing The HSS (Basic) Unit: .............................................................................................................................................9
Installing the KZZ (Knock-down) Unit:....................................................................................................................................9
HiLine™ selection data ........................................................................................................................................................13
Model KZZ (Knock-down Unit) Unit Sizes S03 Thru S08 (300 thru 800 cfm) .....................................................................17
Model HSS (Basic Unit) Unit Sizes S03 Thru S08 (300 thru 800 cfm) ................................................................................18
Riser Location — HSS and KZZ Unit Sizes S03 Thru S08 (300 thru 800 cfm)...................................................................19
Model HSS (Basic Unit) Unit Sizes S10 Thru S12 (1000 thru 1200 cfm) ............................................................................20
Riser Location — HSS Unit Sizes S10 and S12 (1000 thru 1200 cfm) ...............................................................................21
Engineering guide specifications .......................................................................................................................................... 25
ARI certification, U.L. and CUL listing
McQuay HiLine fan-coil units are tested and rated in accordance
with Air Conditioning and Refrigeration Institute (ARI) Standard
440 and certified in accordance with the ARI certification program.
ARI certification assures you full rated performance and offers
confidence in unit selection.
HiLine fan-coil units are listed by Underwriters Laboratories as
complying with nationally recognized safety standards for fan-coil
air conditioning units.
“HI-F” and “HiLine” are registered trademarks of McQuay International.
“McQuay” is a registered trademark of McQuay International.
“Bulletin illustrations cover the appearance of McQuay International products at the time of publication and
Page 2 / Catalog 770-14
we reserve the right to make changes in design and construction at anytime without notice.”
©2011 McQuay International. All rights reserved throughout the world.
Ratings Certified By
The Air Conditioning
& Refrigeration
Institute
CUL Listed
McQuay HiLine™ fan-coil units
The McQuay HiLine fan-coil air conditioning units are
designed for use in multiple floor apartments, office
buildings, hotels and other similar applications and require
a minimum amount of floor space. Just one HiLine unit
may do the job that formerly required more than one
conventional unit.
The results of many years of experience in the development,
design and manufacture of fan-coil air conditioners have
been incorporated in the McQuay HiLine units to provide
highly efficient, quiet performance; individual thermostatic
control; simple, low cost installation; application flexibility;
and low maintenance and operating costs with no sacrifice
in room comfort, design, or appearance.
For the ultimate in design, performance, efficiency, flexibility
of application, and ease of installation and maintenance,
look to McQuay HiLine fan-coils.
Application flexibility
Two distinct designs are available with the complete
flexibility necessary for any application requirement.
• Low cfm design - The 300 through 800 cfm blowthrough configuration units are designed to meet
individual room control requirements.
• High cfm design - The 1000 and 1200 cfm drawthrough configuration units are designed for multiple
discharge arrangements so that one unit can serve
more than one room.
Both designs are available for two-pipe and four-pipe
systems with single, double, triple and top discharge
arrangements. Optional equipment is available to provide
complete application flexibility.
Contact your McQuay representative for a copy of the
McQuayTools™ selection program to choose a unit meeting
your needs.
Nomenclature
F HSS 1 S03 A C
Product Category
F=Fan Coil
Product Identifier
HSS Hi-line Series Vertical Unit
KZZ Knock Down Hi-line w/o Valves
Design Series
1=A Design
2=B Design
3=C Design
4=D Design
5=E Design
Nominal CFM
S02=200
S03=300
S04=400
S06=600
S08=800
etc......
Coil Options (Not available on all prod.)
C=Lo-Flow
N=Lo-Flow Coil w/2-Way Valve
P=Lo-Flow Coil w/3-Way Valve
Q=Lo-Flow Coil w/2-Way Valve Deluxe
R=Lo-Flow Coil w/3-Way Valve Deluxe
Voltage
A=115-60-1
B=200-60-3
G=230-60-1
I=230/460-60-3
J=265-60-1
L=575-60-3
Q=115/230-60-1
Z=Not applicable
Catalog 770-14/ Page 3
Low cfm design (300 thru 800 cfm)
Blow-Through Units to Meet Individual Room Requirements
LOW SOUND LEVEL OPERATION - The low cfm design features a
NEUTRAL UNIT SHOWN
(Risers in back)
quiet, energy efficient motor and fan assembly, carefully located within
a fully insulated cabinet to provide low sound level operation.
DISCHARGE ARRANGEMENTS
- Single, double, triple and top
discharge arrangements are
available.
CONTROLS - Face mounted, plug-in type,
combination 3-speed switch and thermostat.
Thermostat electrical box is adjustable for wall
thickness. No wiring required.
ACCESS & SOUND BAFFLE
PANEL - Insulated galvanized steel.
Easily removed for complete access
for service.
RISERS - Factory cut 104” long.
No on-the-job cutting required.
Supply and return risers have
factory installed sweat ball valves
and are factory insulated
FAST, SIMPLE INSTALLATION -
Simply stack one unit above the other,
sweat the couplings to the risers and
connect the power. The unique nonstop slip couplings require only one
person for setting and connecting.
CABINET - Heavy
gauge galvanized
steel. Fully insulated
for quiet operation.
Optional valve packages can
be provided for 24V, 115V,
and 277V.
RETURN AIR GRILLE PANEL -
Heavygauge steel with stamped grille
and attractive Antique Ivory finish.
Available as an accessory.
Page 4 / Catalog 770-14
FILTER - Easily accessible by
simple removal of return air
grille panel.
OPPOSITE HAND UNITS - Two adjacent
room units can be connected to a single
set of risers and still retain individual room
temperature control. Twin units must be joined
in the field. Reverse piping for same hand
units not available.
COILS - High efficiency type
for full rated capacity. AHRI
certified.
REMOVABLE CHASSIS
- All components are
mounted on a single
removable chassis so that
a different capacity chassis
can be installed in the
same cabinet should future
needs require it.
MOTOR & FAN ASSEMBLY -
Quiet, energy efficient, permanent
split capacitor motors and
centrifugal fans for low sound
level. Fan housings are of a split
type design or have separate inlet
rings to allow easy removal of the
fan motor.
High cfm design (1000 thru 1200 cfm)
For Multiple Discharge Arrangements
SPECIALLY DESIGNED FOR HIGH CFM PERFORMANCE - These draw-through type units are ideal for luxury hotel
and condominium type buildings where multiple discharge arrangements with a common return air location, high cfm
peformance and quiet operation are required.
NEUTRAL UNIT SHOWN
(Risers in back)
FAST, SIMPLE INSTALLATION - Simply stack one unit
above the other, sweat the couplings to the risers and
connect the power. The unique non-stop slip couplings
require only one person for setting and connecting.
RISERS (Not shown) - Factory cut 104” long. Supply and return
risers are factory insulated. The unique non-stop slip couplings
require only one person for unit setting and connecting.
DISCHARGE ARRANGEMENTS - Single,
double, triple and top discharge arrangements
are available.
OPPOSITE HAND UNITS - Two
adjacent room units can be
connected to a single set of risers
and still retain individual control of
each unit. Twin units must be joined
in the field. Reverse hand piping for
same hand units not available.
CABINET - Heavy gauge galvanized steel.
Fully insulated for quiet operation.
CONTROLS - Unit-mounted combination
3-speed switch and thermostat. Thermostat
electrical box is adjustable for wall thickness.
Thermostat wiring required in the field
(optional molex connections can be provided).
MOTOR & FAN ASSEMBLY (Not
shown) - Quiet, energy efficient,
permanent split capacitor motors
and centrifugal fans, mounted in
the draw-through position with a
common return air location, provide
high cfm performance with low
sound level.
SWEAT BALL VALVES - are
factory mounted on coil.
Optional valve packages can
be provided for 24V, 115V,
and 277V.
COILS - High efficiency type for
full rated capacity. ARI certified.
RETURN AIR GRILLE PANEL - Heavy
gauge steel with stamped grille and
attractive Antique Ivory finish.
ACCESS & SOUND BAFFLE PANEL -
Easily removed for complete access to
internal controls, motor and fan assembly
for service.
FILTER - Easily accessible by simple
removal of return air grille panel.
Catalog 770-14/ Page 5
Design features for high performance
and low operating cost
Unit configuration
Telescoping
Thermostat Box
Plug-in Field Mounted Thermostat
Unit sizes S03 through S08 feature a blow-through
design with completely removable chassis. The motor,
fan assembly, coil(s), drain pan and valve packages are
mounted on a compact chassis which slides out through the
return air grille and access panel.
Unit sizes S10 and S12 feature a draw-through design.
Filter, drain pan and drain line are accessible by removing
the return air grille. Controls, valves, motor and fan
assembly are accessible by removing the access panel.
Knock-down unit
The KZZ knock-down unit configuration, available for unit
sizes S03 through S08, allows installation, leak testing
and insulation of the risers and stub-outs prior to the
unit placement. Risers can be field provided or factory
supplied and shipped to the jobsite before the units. After
riser installation, the bottom half of the unit is set in place.
Connections are then made to the supply, return and drain
risers as well as the power supply. Then the top half of the
unit is installed.
Sizes
S06 -S12
Fan and Motor Assembly
Sizes
S03 & S04
Control systems
A variety of thermostats, unit or wall mounted, are offered
to control all different options for fan and valve cycling. For
unit mounted thermostats all wiring is provided to the control
box for easy field installation (optional Molex connections
are available upon request). A 10K thermistor is mounted
in all units. It can be used for factory provided thermostats
or for field provided controls. The thermostat electrical
box is adjustable for any wall thickness up to 3-7/8" and is
provided with a 1/2" mud ring (an optional 5/8" mud ring can
be provided upon request).
Thermostats
• Unit mounted 2 or 4-pipe systems (24v–277v)
• Wall mounted 2 or 4-pipe systems (24v–277v)
• Automatic or manual changeover
• Digital display
• Optional quick connect for unit mounted thermostats
(Please reference ED 18513 for thermostat availability and
options)
Efficient, quiet fans and motors
Three-speed, permanent split capacitor motors coupled
with DWDI forward curved direct drive fans provide
efficient operation. Motors have sleeve bearings, oilers and
inherent automatic reset thermal overload protection. Unit
sizes S03 through S04 have a two-piece fan housing with
integral scroll and inlet. Unit sizes S06 through S12 have
a heavy-gauge steel fan housing with integral scroll and
separate inlets. All fan wheels are statically and dynamically
balanced. Efficient fans, PSC motors, resilient motor mounts
and a fully insulated cabinet provide quiet operation.
Page 6 / Catalog 770-14
Factory- and field-installed risers
Insulated risers are available factory-installed or can be
shipped with or prior to the units for field installation (factoryinstalled risers are not available for KZZ knock-down units).
See details below. On S03 through S08 units, sweat ball
valves are included with factory risers.
All copper risers are factory cut to 104” in length. Nonstop slip couplings for supply and return risers and stop
type couplings for drain risers may be ordered separately.
Insulation meets or exceeds current flammability
classification UL94. Insulation to cover slip couplings must
be field provided.
• Supply and return risers are of type “L” copper in
nominal 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2" diameters with
3/4" factory installed, closed cell flexible foam insulation.
• Drain risers are available in PVC or type “L” copper
(insulation included), in nominal 3/4" or 1-1/4" diameter.
• Optional 1/2" closed cell insulation is available for
supply, return, and drain risers.
• Optional M or K type copper is available with closed cell
insulation.
Note:
When risers are factory-mounted on master-slave units, the
master unit is shipped with the riser attached. This riser will
have 3" stubs that match up to the slave unit. The slave
unit will not have ball valves attached to the valve package.
See Page 22 for master-slave riser locations. Ball valves, if
required, must be purchased separately and will ship loose
for field mounting. See IM 283 for additional information.
Fast, low-cost installation
Installation time is minimized by the unit’s design, riser slip
couplings, and unit mounted controls. Units are completely
factory assembled and wired and have individual thermostat
controls. Risers are factory cut to 104” in length and
insulated. Optional riser couplings are available. Installation
is accomplished by simply stacking the units one above
the other floor-by-floor, brazing the couplings and risers
together, and connecting the power. Only one person is
required for installation because the slip couplings eliminate
the requirement for perfect unit alignment with the swedged
riser joints of other manufacturers.
Twin units
To reduce installed cost, two units of opposite hand on
each floor can share a set of supply, return and drain risers.
Individual thermostat control is retained by each unit. Units
can be placed side-to-side, or side-to-back
Coils
High-capacity, low-flow heating/cooling coils are standard.
Separate row heating coils are available for 4-pipe systems.
All coils are furnished with manual air vents..
Riser, Slip Coupling and Insulation
High performance coils
Two-pipe system units have a standard low-flow, high
capacity cooling/heating coil. Four-pipe system units have
a standard low-flow, high capacity cooling coil and a onerow heating coil. All coils are seamless copper tubes in a
staggered pattern and feature the patented HI-F rippled and
corrugated aluminum fins for high heat transfer efficiency.
Full depth collars are drawn in the fin stock for accurate
control of fin spacing and completely cover the copper
tubes to lengthen coil life. Copper tubes are mechanically
expanded into the fin collars to provide a positive primary
to secondary surface bond. Manual air vents on coils are
provided. Ball valves on supply and return lines are provided
at the coil on S10 and S12 models. Coils are positioned for
rapid condensate drainage, balanced airflow and full rated
capacity. Unit capacities are ARI certified.
Factory-installed valve packages and options
Multiple configurations of two- and three-way motorized
valves are available as described below, without or without
unions. Ball hand valves and flow metering devices are also
available.
• Standard high voltage valve package 115–277v
(includes 2 or 3-way motorized On/Off valve and shutoff valves for supply and return)
• Deluxe high voltage valve package 115–277v (includes
2 or 3-way motorized On/Off valve, strainer, circuit
setter, P/T ports, and shut-off valves)
• Optional 24v On/Off or modulating valves
• Custom valve packages available
• Fixed flow control
• Optional stainless steel braided hoses
Insulation to cover slip
coupling (by others)
Optional Valve Package Components
Motorized Valve
Automatic
change-over
control
Ball Valve
P/T Plug
“Y” Strainer
Flow Control
Device
Catalog 770-14/ Page 7
Optional features and accessories
Motors
115/60/1 and 277/60/1 motors are available. All motors
Electric Heat
Fresh Air Dampers
are 3-speed permanent split capacitor type with sleeve
bearings, oilers, resilient mounts and automatic reset
internal overload protection.
Electric heat
A specially designed, optional electric heat unit is available
for supplementary heat between seasons or to provide full
electric heating. All heaters are protected by automaticreset, high-limit thermal cutouts. Service access to electric
heaters is through the return air grille and access panel for
unit sizes S03 through S08. It is through the discharge grille
for unit sizes S10 and S12.
Cabinet closed cell insulation
Cabinets can be supplied fully insulated with 1/2" closed
cell insulation (1/2" multi-density glass fiber is standard).
Fresh air dampers
A motorized, two-position fresh air damper kit is available
for field mounting in one of three locations. A manual fresh
air damper kit is also available. Outside fresh air must be
tempered before entering the unit if freezing conditions are
expected.
Discharge Grilles
Double Deflection
Discharge
Arrangements
Single Deflection
Return air grilles
Return air grille options include the standard stamped
return air grille or an optional bar type grille. Both grilles
are manufactured of heavy-gauge steel and coated with an
electrostatically applied baked-on Antique Ivory finish. A
plaster frame is standard to provide easy access for filter
replacement.
Filters
One inch throwaway filters are standard.
Discharge arrangements and grilles
Two sizes of aluminum single deflection or double
deflection grilles are available. Grilles may be field mounted
on the panel opposite the riser and on one or both panels
adjacent to the risers. A top discharge opening is also
available.
Line-of-sight baffle
A line-of-sight baffle is available for applications involving
two opposing discharge openings.
Page 8 / Catalog 770-14
Installing The HSS (Basic) Unit:
Installing the KZZ* (Knock-down) Unit:
1. The McQuay HiLine basic
unit is simply lifted into place
directly above the unit on the
floor below.
2. This unit has been set in
place, ready to accept the
unit above.
3. Next, using factory available
slip couplings, connect the
prefabricated supply, return
and drain risers together,
connect the
basic installation is completed.
Wall board can be applied
directly to the unit.
power, and your
1. Unlike the basic unit, the
KZZ unit allows installation,
leak testing and insulation of
the risers and stubouts prior
to unit placement.
2. The bottom half of the unit is
set in place, and the supply,
return and drain risers are
connected to the unit along
with the power supply.
3. The top half of the unit is
then easily installed and the
factory suppled thermostat
harness is connected
.
4. After the unit has been
“furred-in” and the room
painted, it takes only a few
minutes to attach the grilles
and plug in the thermostat.
5. When the installation is
completed, the unit blends
in beautifully with the
surrounding decor and takes
up a minimum of floor space.
*The “KZZ sectioned cabinet for room air conditioning unit” is covered under U.S. Patent No. 4,426,120.
4. Finishing the installation
is the same with either the
standard HSS model or the
knock-down KZZ model.
5. Both HiLine units can be
located away from an outside
wall to form a curtain cove,
or built into a room divider.
It’s easy to conceal the units
in a corner or build them into
a wall to serve two or more
rooms. And, of course, the
creative architect will think of
many more applications for
this versatile unit.
Catalog 770-14/ Page 9
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