Carrier’s extensive range of
superior fan-coil units
combine design flexibility
with easy, low-cost
installation.
Versatility
With Carrier’s 42 Series fan coils, you
can select from 4 horizontal, 6 vertical,
5 ducted or 5 stacked models; furred-in
or cabinet style, slant top or low silhouette, in 150 through 2000 cfm capacities. Coils are available with up to 5
rows (depending on model), to satisfy a
variety of application requirements. The
units are ideal for installation in motels,
apartments, and other multi-room buildings. Many optional control packages
are available to facilitate the following
modes of operation: 2-pipe heating and
cooling, 2-pipe heating and cooling
with auxiliary electric heat, 2-pipe cooling with total electric heat, and 4-pipe
heating and cooling. The control package offering includes 24-v or line voltage thermostats and BACnet* communicating controls.
Casings and frame are fabricated from
tough, heavy gage galvanized steel. Custom decorative colors allow the unit to
blend with any interior design.
Each unit is designed to occupy a
minimum space. No complex system
controls are required for Carrier fan
coil units. Piping, drain, and wiring
connections are readily accessible and
mounting holes and slots are predrilled to save installation time and field
labor expense.
42 Series quality reduces
service and maintenance
expenses
All coils are factory leak tested at
300 psig air pressure with coil
submerged in water. Condensate drain
pans are available in stainless steel or
heavy gage galvanized steel constructions, along with optional condensate
overflow switches complying to the latest building codes. A variety of insulation types are available for energy savings, sound absorption and indoor air
quality (IAQ) preservation.
Efficient operation
Blower wheels are centrifugal-type,
forward curved, double width, and double inlet sized for maximum efficiency.
Quiet, dependable
performance
All units are built to operate unobtrusively with quiet motors and fans. In ad-
1
dition,
insulation is used to line the cabinet.
/2-in. thick sound-absorbing,
42C Series horizontal, 42V
Series vertical units
Carrier room fan coil units operate at
exceptionally low sound levels. A
generous amount of insulation absorbs
operating sound and rugged, rigid
construction ensures vibration free operation at all fan speeds.
Economical, three-speed fans deliver
just the right amount of conditioned air
for your comfort needs at any load,
and each unit can be shut off when not
in use. Optional electronically commutated motors deliver peak operating efficiency. By choosing Carrier units,
you can match your application with a
wide range of custom-designed options
and accessories, including electric heat.
Filters are cleanable or throwaway
type.
Carrier room fan-coil units provide
unsurpassed year-round comfort.
2
Page 3
42D ducted units
A drip lip (removable drain pan extension) is available for field installation on
ceiling models 42DA,DC,DE and DF.
The drip lip is recommended for all
ceiling models when a valve package is
installed.
Motor/blower assembly can be easily removed from the unit for ease of
service. Removing this assembly provides clear access to the entering air
face of the coil, making coil cleaning a
relatively simple matter. Removable
panels make access to components
and connections easy.
42S stacked units
Each Carrier stack unit comes factory
equipped with insulated supply, return,
and drain risers. The design of the 42S
units allows them to be set one on top
of the other in a vertical column rising
floor to floor up the building. Each riser has a 3-in. belled section at the top,
so the riser piping can be connected by
only one sweat connection per riser.
Field-installed couplings or internal
pipe connections are not needed.
Each stack unit is constructed of
18-gage galvanized steel and factory
pre-wired with all control, motor, and
optional electric heat wiring conveniently terminating in a single,
accessible junction box. Each stack unit
requires only one field power
connection.
Field-mounted accessories, such as
the 3-speed switch/thermostat package for furred-in units, are equipped
with a pre-wired quick disconnect plug
for easy installation.
The riser size for the stack units can
be specified to match building requirements so that cutting, sorting, and handling of the risers is not necessary. All
units arrive tagged as specified by the
customer for efficient delivery to the
correct building location.
Units can be loaded onto delivery
trucks so that they can be off-loaded in
the proper installation sequence.
The 42SG furred-in-stack is a single
unit, designed for concealed
applications in corners or along room
walls. The return-air grille is removable
to allow access for servicing major
components.
The 42SG is also available in
master/slave unit pairs, shipped individually and installed and piped together in the field. The master unit includes
risers with stub out for field piping connections to the slave unit which has no
risers of its own.
The 42SJ back-to-back furred-in
stack is designed for installation in the
separation wall between 2 rooms. The
unit consists of 2 units piped to a set of
common risers. Each unit has its own
valves and controls. The return-air
grille is removable to allow access for
servicing major components.
The 42SH cabinet stack unit is designed for applications where concealed installations are not possible or
practical. This model features a doubledeflection supply-air grille and an integral return-air grille access panel. Controls are normally mounted on the unit
but may also be remote wall mounted.
The 42SU universal furred-in stack
is designed for easy field configuration
utilizing laser cut knockouts. Riser,
drain, supply, and outside-air knockouts have been strategically located on
the unit for field configuration. Prior to
unit installation, all risers are shipped
separately from the units for pre-installation and testing purposes.
The 42SM mega furred-in stack unit
is designed for applications requiring
units with increased capacity. The
42SM is designed to deliver 1400 to
2000 CFM at 0.5 in. ESP (external
static pressure). Although usually installed in a small mechanical closet, the
unit also features an optional decorative return air panel to allow for a classic high-rise type application. The
unit’s high static capability will easily
handle high-efficiency air filters and
decorative supply grilles, while the
modular design provides quiet
operation.
* Sponsored by ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engineers).
3
Page 4
Features/Benefits (cont)
42CA
Furred-in ceiling model with low silhouette.
(200-1200 cfm)
42CG
Cabinet model for under-ceiling mount with
bottom or rear stamped louver return air grille.
(200-1200 cfm)
42CE
Furred-in ceiling model with factory-installed
plenum.
(200-1200 cfm)
42CK
Cabinet model with telescoping flip-down panel
and stamped louver bottom return or duct
collar rear return.
(200-1200 cfm)
4
Page 5
42VA
Furred-in model for under-the-window
applications with top or front discharge.
(200-1200 cfm)
42VF
Cabinet model with slant top and
top or front discharge.
(200-1200 cfm)
42VC
Furred-in lowboy model for concealed underthe-window applications.
(200-600 cfm)
42VE
Cabinet lowboy model with stamped louver discharge grille and 2 control access doors.
(200-600 cfm)
42VG
Furred-in wall model. Available with a 10-in.
valve compartment extension.
(150 and 300 cfm)
42VB
Cabinet model with top or
front discharge.
(200-1200 cfm)
5
Page 6
Features/Benefits (cont)
42-68d
42DA
Furred-in model for installation in the
ceiling or over the closet.
(600-2000 cfm)
42DD
Vertical model with galvanized casing.
Commonly for closet installation.
(600-2000 cfm)
42DE
Ceiling model with galvanized casing.
(600-2000 cfm)
42DC
Furred-in ceiling model with factory-installed
insulated plenum.
(600-2000 cfm)
6
42DF
Exposed-ceiling cabinet model with integral double-deflection discharge grille and
a bar-type return-air grille.
†Standard grille is steel; option is available as steel or aluminum.
**Registered trademark of Johns Manville.
X
8
Page 9
AVAILABLE OPTIONS (cont)
OPTIONS OR STANDARD FEATURES*
FILTERS
1-in. Permanent FiltersXXXXXXXXXXX X X X
1-in. Throwaway FiltersStdStdStdStdStdStdStdStdStdStdStdStdStd Std Std Std Std Std
1-in. MERV 7 PleatedXXX
1-in. MERV 8 Pleated XXXXXXX X X X X
1-in. MERV 13 PleatedXXXX
2-in. MERV 8 PleatedXXX
2-in. MERV 13 PleatedXXX
LEVELING LEGSXXXXXX
INSULATION
Foil Faced InsulationXXXXXXXXXXXXXXX X X XX
Fiberglass InsulationStd Std Std Std Std Std Std Std Std Std Std Std Std Std Std StdStdStdStdStd
Closed Cell InsulationXXXXXXXXX
Exact-O-KoteETO ETO ETO ETOETO ETO ETO ETO ETO ETO ETO ETO ETO ETO ETOETO
MOTORS - PSC
120-1-60, 3-SpeedStd Std Std Std Std Std Std Std Std Std Std Std Std Std Std StdStdStdStdStd
208-1-60, 3-Speed XXXXXXXXXXXXXX X X X X X
230-1-60, 3-Speed XXXXXXXXXXXXXX X X X X X
277-1-60, 3-Speed XXXXXXXXXXXXXX X X X X X
220-1-50, 3-Speed XXXXXXXXXXXXXX X X X
MOTORS - EC
120-1-60, 3-Constant TorqueXXXXXXXXXXXXXX X X X X X
208-1-60, 3-Constant Torque XXXXXXXXXXXXXX X X X X X
230-1-60, 3-Constant Torque XXXXXXXXXXXXXX X X X X X
277-1-60, 3-Constant Torque XXXXXXXXXXXXXX X X X X X
220-1-50, 3-Constant Torque XXXXXXXXXXXXXX X X X X X
MOTOR QUICK-DISCONNECT PLUGStd Std Std Std Std Std Std Std StdStd Std Std Std Std StdStdStdStdStd
INTEGRAL THERMAL OVERLOAD
PROTECTION
RETURN AIR GRILLE, Shipped Loose
Stamped Return GrilleStd StdXXStd StdStdStdStdStdX
Hinged PanelStd
TAMPERPROOF LOCKS (Camloc**)
Access PanelsStd StdStd StdStdStd StdStdStdStdStdStd
Control Access DoorsXXX
VALVE PACKAGESXXXXXXXXXXXXXXX X X X X X
WIRING PACKAGESXXXXXXXXXXXXXXX X X X X X
LEGEND*All options are factory-installed unless noted as shipped loose.
EC — Electronically Commutated
ETO — Engineered to Order
PSC — Permanent Split Capacitor
Std — Standard
X — Available as Options
Ceiling — HorizontalVertical FloorDucted — HorizontalStack — Vertical
CA CE CG CK VA VB VF VC VE VG DA DC DE DF DDSGSHSJSUSM
†Standard grille is steel; option is available as steel or aluminum.
***Registered trademark of Johns Manville.
9
Page 10
Options (cont)
Factory-installed options
Coils — Choice of a 2-pipe or 4-pipe system with the fol-
lowing chilled/hot water coil configurations:
42DA, DC,
42DA, DC,
42DA, DC,
42DA, DC,
UNIT
——
——
——
——
42VA,VB,
VC,VE,VF
only
42VA,VB,
VF only
42VA,VB,
VF only
42VA,VB,
VF only
42VA,VB,
VF only
42VC,VE
only
42VA,VB,
VF only
42VA,VB,
VF only
42VA,VB,
VF only
COIL CONFIGURATION
2-Row Coil•ETOETO—
3-Row Coil
4-Row Coil
5-Row Coil——42SM only—
6-Row Coil—•——
8-Row Coil*—ETO——
Opposite End Coil
Connections
3/1
3/2
4/1
4/2—•——
6/1
6/2
Same End Coil
Connections
2/1
3/1
3/2
4/1
4/2—•——
6/1
6/2
Cu/Cu Coil Special
Option*
LEGEND
•Available
—Not Available
ETOEngineer to Order
*Needs quote control.
42C42D42S42V
•••
•••
•••
•••
•••
—
DE,DF only
—
DE,DF only
———
•••
•••
•••
—
DE,DF only
—
DE,DF only
ETOETOETOETO
Seismic Compliance Options — Several models have
been tested and approved for installations requiring IBC or
OSHPD seismic certification. See the following tables for
approved models and options.
Condensate overflow switch — This switch shuts down
the unit when the water level in the drain pan reaches an
unsafe level. Building code changes in many locales now
require this type of device.
Decorative colors — A wide variety of colors (Champagne Beige, Toffee Brown, Ermine Grey, and Polar
White) are available to match any interior décor. Select a
desired color from a paint chip chart, Catalog number
842-011, or provide paint chip for matching. Standard
color is now Arctic White; the other colors require a special
quote. Optional or custom colors will only be quoted by the
factory if the volume is significant enough to use the minimum quantity of paint required by the painting vendor.
Therefore, the optional or custom color will not be available on small quantities of units. As an alternative, units
can be coated with primer by the factory to allow for field
painting.
Decorative colors may be applied to:
• Cabinet of 42VB, VF, VE, VG
• Cabinet of 42CG
• Panels of 42SH
• Bottom panels of 42CK
• Cabinet of 42DF
Electric heaters — Coils are of high grade single-phase,
nichrome resistance wire, insulated by ceramic insulators in
plated steel brackets. Heater sizes available are shown in
the application data section for the respective units. Not
available on 42VG units.
Filters — Each unit (except the 42CA, DA units) includes
a non-woven synthetic throwaway filter sized for low velocity and maximum efficiency. The standard option will filter
both return and outside air. For optional filters, please refer
to available option table on pages 8 and 9.
Fusing — Incoming power fusing, as well as blower motor
and control sub-fusing for units that use electric heat. The
blower motor and control sub-fusing (single power source
wiring) is required when single source power with electric
heat is specified.
Manual air vents — Each standard coil includes a manual air vent to allow venting at the coil if necessary for
quick, complete air elimination.
Motors — Three-speed PSC (permanent split capacitor)
motors are offered as standard, providing the ability to
adjust airflow to meet varying load conditions. High-static
PSC motors are available as an option for applications
requiring higher external static capability. ECM (electronically commutated) motors are optional on all units except
42VG. ECM motors offer programmable features, low
sound, and increased energy efficiency. Refer to the application data section for more information on ECM control
methods.
Outside-air opening/damper — Damper is adjustable
from 0 to 25% and provides ventilation air to unit.
(Manual/motorized damper available on 42SG, SH, SJ,
SM units.)
Service switches — Concealed service switches are
available for use by maintenance and service personnel to
shut off the power while working on the unit.
Single power source connection — Factory-installed
junction box allows use of single power source for motor
and heater when they are of the same voltage.
Stamped toe space return-air grille — The return-air
grille is available as a factory-installed option for 42VB and
42VF units.
Tamperproof Camloc fasteners (Allen head) —
Camloc fasteners are installed on the access panels and are
available for all cabinet model units.
Thermostat control packages — We offer a variety of
control devices to meet the most basic to the most
demanding operating logic. All of our control schemes utilize 3-speed fan control to modulate cooling output, maximize the percentage of latent heat removal, and to further
reduce the sound level when maximum cooling and
10
Page 11
heating performance is not required. The standard thermostat control option is line voltage except on 42SU and
are available on the 42V Series units. For thermostat con-
trol package options refer to pages 13-16.
42SM, which include a low voltage control package as
standard. Unit-mounted line voltage and 24-v thermostats
42C SEISMIC COMPLIANCE OPTION COMPATIBILITY CHART
OPTIONDESCRIPTION
2-Pipe Hydronic Coil
Configurations
4-Pipe Hydronic Coil
Configuration
Electric HeatAll electric heat optionsIII/OI/O
Service SwitchesAll service switch optionsIII/OI/O
Coil Options
PSC Motors115V, 208V, 230V, 277V, Single Phase, 60 HzIII/OI/O
Control Packages
Individual Valves and
Valve Packages
Filters
Drain Pan
Cabinet Insulation
LEGEND
I — International Building Code (IBC) Compliance
O — Office of Statewide Health Planning and Development (OSHPD)
Pre-Approved (OSP-0229-10)
2-Row CoilIII/OI/O
3-Row CoilIII/OI/O
4-Row or 5-Row CoilIII/OI/O
2/1 or 2/2 Split CoilIII/OI/O
3/1, 3/2, or 4/1 Split CoilIII/OI/O
Stainless steel coil wrapperIII/OI/O
Coil air vents (manual or automatic)III/OI/O
Coil drainsIII/OI/O
All control package options EXCEPT Fan Coil
Open and CCN Controllers (Digit 16 cannot be
W or Z)
All valve options EXCEPT modulating valves and
valve packages containing modulating valves
1-inch throwaway or permanent washableNAII/OI/O
1-inch pleated MERV 8NAII/OI/O
Standard drain panIII/OI/O
Stainless steel drain panIII/OI/O
Tell-TaleIII/OI/O
Drip LipIII/OI/O
Extended main drain pan (galvanized or stain-
less steel)
Condensate overflow switch (option 26-A)III/OI/O
Standard Tuf-Skin fiberglass insulationIII/OI/O
Foil-faced fiberglass insulationIII/OI/O
42CA42CE42CG42CK
III/OI/O
III/OI/O
III/OI/O
NOTES:
1. Seismic compliance option includes factory-supplied, fieldinstalled isolation hanger and seismic restraints required for a
given unit.
2. Direct expansion (DX) coils and steam coils are not compatible
with seismic compliance option.
3. Electonically commutated motors (ECM) are not compatible with
seismic compliance option.
UNIT
11
Page 12
42D SEISMIC COMPLIANCE OPTION COMPATIBILITY CHART
OPTIONDESCRIPTION
UNIT
42DA42DC42DE42DF42DD
2-Pipe Hydronic Coil
Configurations
3-Row CoilIII/OI/OI/O
4-Row or 5-Row CoilIII/OI/OI/O
6-Row CoilIII/OI/OI/O
7-Row or 8-Row CoilIII/OI/ON/A
4-Pipe Hydronic Coil
Configuration
3/1, 3/2 or 4/1 Split CoilIII/OI/OI/O
4/2 Split CoilIII/OI/OI/O
6/1 or 6/2 Split CoilIII/OI/ON/A
Electric HeatAll electric heat optionsIII/OI/OI/O
Service SwitchesAll service switch optionsIII/OI/OI/O
Coil Options
Stainless steel coil wrapperIII/OI/OI/O
Coil air vents (manual or automatic)III/OI/OI/O
Coil drainsIII/OI/OI/O
PSC Motors115V, 208V, 230V, 277V, Single Phase, 60 HzIII/OI/OI/O
Control Packages
All control package options EXCEPT Fan Coil
Open and CCN Controllers (Digit 16 cannot be
W or Z)
III/OI/OI/O
Individual Valves and
Valve Packages
All valve options EXCEPT modulating valves
and valve packages containing modulating
valves
III/OI/OI/O
Filters
1-inch throwaway or permanent washableNAII/OI/OI/O
1-inch pleated MERV 8NAII/OI/OI/O
Drain Pan
Standard drain panIII/OI/OI/O
Stainless steel drain panIII/OI/OI/O
Tell-TaleIII/OI/OI/O
Drip LipIII/OI/OI/O
Extended main drain pan (galvanized or stain-
Standard Tuf-Skin fiberglass insulationIII/OI/OI/O
Foil-faced fiberglass insulationIII/OI/OI/O
LEGEND
I — International Building Code (IBC) Compliance
O — Office of Statewide Health Planning and Development (OSHPD)
Pre-Approved (OSP-0229-10)
NOTES:
1. For Horizontal Units (42DA, DC, DE, DF) - Seismic compliance
option includes factory-supplied, field-installed isolation hanger
and seismic restraints required for a given unit.
2. For Vertical Unit (42DD) - Seismic compliance option offers hard
mounting or isolated mounting. For hard mounting, expansion
anchors with all brackets is factory supplied, field installed. For
isolated mounting, required isolation mounting system is factory
provided, field installed.
3. Direct expansion (DX) coils and steam coils are not compatible
with seismic compliance option.
4. Electronically commutated motors (ECM) are not compatible with
seismic compliance option.
Options (cont)
Field-installed accessories
Automatic air vents — Automatic air vents have fiber
washers which allow air in the pipes to pass through, automatically bleeding the system, and eliminating the need to
manually remove air from the system. When wet, washers
swell and seal the system.
Drip lips (removable drain extension) — Drip lips are
frequently used when valves are added after unit installation and space limitations will not permit use of an
extended drain pan. The drip lip is placed on the end of
the drain pan and is pitched toward the pan to ensure
proper drainage. The drip lip gives positive control of condensate from valves and controls.
Panels, frames, and grilles — Panels, frames, and
grilles on the 42S Series units can be chosen in a wide variety of combinations to suit room decorating requirements
and allow access to the unit for maintenance. Discharge
grilles are double deflection type, aluminum finish or
12
painted. Return-air access panels containing return-air
grilles are available in five different types as illustrated on
pages 114 and 115.
PA NE L
NO.
Standard, 18-gage galvanized steel. Coated with baked-on
1
Arctic White enamel finish. Attached to unit with
fasteners.
18-gage galvanized steel. Coated with baked-on Arctic White
2
enamel finish. Includes access door for concealed unitmounted controls.
Bar-type extruded aluminum with frame matching double
3
deflection supply grille. Fastens to wall and unit with 1
long screws.
4
18-gage galvanized steel. Coated with baked-on Arctic White
and
enamel finish. Frame mounted on sheetrock with screws.
5
Panel mounted in frame with
AllEach panel provides access to all internal components.
PANELS, FRAMES AND GRILLES
DESCRIPTION
1
/4 turn fasteners.
1
/4 turn
1
/2 in.
Page 13
Return-air grilles — Stamped-type return-air grilles are
standard on 42CG,CK,VE,VG,SG,SH,SJ,SU units and
optional on 42VB,VF,SM units. Anodized aluminum
hinged bar-type grilles are installed on 42DF units.
Risers — The 42S Series units can accommodate
(supply and return) and 1-in. (drain) to 2
1
/2-in. riser sizes in
3
/4-in.
2-pipe systems. For other applications, such as reverse
return risers or 4-pipe systems, it may be necessary to
accommodate the additional risers.
Condensate drains are available in sizes down to 1-in. for
greater cost economy. Riser size-reducers are factory-installed on 42SG, SJ, and SH. For risers over 119-in. long,
extension pieces can be furnished for field installation.
NOTE: Risers for the 42SU,SM units are shipped separately for field installation and testing before the unit is
installed.
Riser expansion — The 42S Series units are built to
accommodate modest expansion of the external riser. This
only allows for expansion between the unit and the
riser. This allowance for movement within the unit is
not intended to replace necessary riser expansion compensation devices that the consulting engineer may deem
advisable for the external riser system. External riser
expansion/contraction compensation and anchoring are
the responsibility of the consulting engineer and the installing contractor.
Risers material and insulation — The 42S Series unit
supply, return, and drain risers can be furnished in type M
or L copper. All factory-furnished risers are insulated with
flexible closed foam insulation in
1
/2-in. or 3/4-in. thick-
ness.
Discharge grilles — Two types of double deflection dis-
charge grilles are available for 42CG, VB, VF, VE units; an
integral steel grille painted to match the unit or a separate
unpainted anodized aluminum grille. Optional discharge air
grilles for 42S Series units are suitable for sidewall application, and available in clear anodized aluminum or Arctic
White finish. The aluminum discharge grilles are suitable
for air dry field painting. The discharge grille frame and
blades are 6063 extruded aluminum alloy with 200-R1
satin anodized finish. The frame has a typical wall thickness of 0.050-in. and is separated from the blades with
injection-molded nylon bushings. This method of assembly
minimizes corrosion and vibration. The frame mounting
holes are dimpled, allowing for a counter-sunk fastener
head appearance. All blades are airfoil in design, individually adjustable and spaced
3
/4-in. on center. At the outer
edge of the frame is a specifically engineered channel
which retains an extruded flexible vinyl bulb gasket that
produces a positive air seal at the mounting surface, minimizing smudging. An optional opposed blade damper is
screwdriver operated through the face of the unit and has
the same extruded aluminum construction and injectionmolded nylon bushings. The unit achieves an effective area
of 80% with the blades set at a 0 degree pattern, thus eliminating high velocity and pressure drop at the grille face.
Wider deflection with reduced throw may be achieved at
the 22 and 45 degree blade settings with slightly increased
sound levels.
Tell-tale drain pan — A secondary drain connection is
located above the primary drain to act as a “tell-tale” in the
event that the primary drain becomes obstructed. They can
be applied to either the main drain pan or an extended
main drain pan. This option is only available on the 42C
and 42DA, DC, DE, DF units.
Thermostats control packages — The standard thermostat control option is line voltage except for 42SU and
42SM units. Wall-mounted line voltage and 24-v thermostats are available on the 42 Series fan coil units. For thermostat control packages options refer to pages 14-16.
Trim strips — Strips are available for use with partially
recessed vertical 42VA units and 42S series units only.
DRIP LIP
(Horizontal Unit)
a42-258
“TELL-TALE” DRAIN PAN
(Horizontal Unit)
a42-259
13
Page 14
Controls
Use the Control Selection Guide table to make sure that all
necessary components are provided for and that the components are compatible with the required control system.
NOTE: When thermostatic fan control is selected or when
unit outside-air dampers are used, unit-mounted thermostats are not recommended as their use will result in poor
room temperature sensing.
CONTROL SELECTION GUIDE
SYSTEMDESCRIPTIONTHERMOSTAT
Fan
Control
(2-pipe)
TwoPosition
Electric
Valves
(2-pipe)
2-PIPE HEATING-COOLING*
TwoPosition
Electric
Valve with
Auxiliary
Electric
Heat
(2-pipe)
TwoPosition
Electric
ELECTRIC HEAT
Valve with
Total
Electric
Heat
(2-pipe)
TwoPosition
Electric
Valves
4-PIPE
(4-pipe)
LEGEND
N.C. — Normally Closed
*If system is HEATING-ONLY or COOLING-ONLY, no changeover or bypass is required.
NOTE: Unit-mounted thermostats are not recommended with either fan-cycle control or applications with outside-air dampers.
Fan manually cycledNoneNoneNone3-Speed switchNot recommended for
Thermostat cycles valve
open or closed.
Thermostat cycles valve
open or closed. Mode automatically switched by
changeover sensing water
temp.
Thermostat cycles valve
open or closed. Thermostat
activates electric heater.
Heater cannot turn on if hot
water is in coil.
Thermostat cycles valve
open or closed.Thermostat
activates electric heater.
Thermostat cycles cooling
valve open or closed. Thermostat cycles heating valve
open or closed.
Wall or unit
mounted includes
heat-cool switch.
Wall or unit
mounted.
Heating/cooling
Thermostat
Wall or unit
mounted.
Sequenced heating
and cooling.
Wall or unit
mounted.
Sequenced heating
and cooling.
Wall or unit
mounted.
Sequenced heating
and cooling.
CHANGEOVER
ON
SUPPLY PIPE
NoneMotorized (N.C.)
YesMotorized (N.C.)
Ye s .
Two Required.
NoneMotorized (N.C.)
NoneMotorized (N.C.)
VALVE
3-way or 2-way,
no bypass
required.
3-way or 2-way
Motorized 3-way
or 2-way
3-way or 2-way,
no bypass
required
3-way or 2-way
(requires 2
valves)
FAN
SWITCH
Thermostat has
integral 3-speed
switch
Thermostat has
integral 3-speed
switch
Thermostat has
integral 3-speed
switch
Thermostat has
integral 3-speed
switch
Thermostat has
integral 3-speed
switch
NOTES
high humidity application
Valve packages with
belled end(s) for field
soldering to coil.
Valve packages with
belled end(s) for field
soldering to coil.
Valve packages with
belled end(s) for field
soldering to coil.
Valve packages with
belled end(s) for field
soldering to coil.
14
Page 15
Remote-mounted controls
OFF
HI
MED
LO
Optional remote-mounted line-voltage
thermostat
3-SPEED SWITCH
Wall mounted 3-speed switch — This switch has 4
positions: OFF, HIGH, MEDIUM, and LOW. Switch has
auxiliary contact that is energized when switch is in HIGH,
MEDIUM or LOW position.
Some of the options common with the 3-speed switch are:
1. Unit-mounted switch on furred-in vertical model. (Available as special order on horizontal models.)
2. Switch without OFF position.
3. Key-operated switch.
Optional remote-mounted thermostat or unitmounted 24-v thermostat
LINE VOLTAGE T155 THERMOSTAT
Line voltage T155 thermostat — Features 50 to 90 F
temperature range, manual 3-speed fan control, mount is a
standard 2 x 4 in. box, 4-pipe, 2-pipe and autochangeover
applications. Available in vertical or horizontal styles.
Unit-mounted controls
Line voltage controls by others — Unit supplied with
wiring for valve cycle operation, including changeover sensors (as required) for use with field-installed line voltage
thermostats.
24-v controls by others — Unit supplied with factoryinstalled 24-v transformer, 3-speed relay board, and aquastat (as required) for use with field-installed low voltage
controls.
3-SPEED SWITCH
24-V DEBONAIR® THERMOSTAT
R
COOL
AUTO
HEAT
24-v Debonair thermostat — Features large Thermoglow™ display, Neverlost™ memory, ExactFit locking
cover, Smart Fan™ dynamic fan speed control, 4-pipe,
2-pipe automatic changeover applications with adjustable
dead band. Programmable and non-programmable models
available.
Unit-mounted 3-speed switch — Switch has OFF,
HIGH, MED and LOW positions. Switch is also equipped
with auxiliary connection energized when switch is in
HIGH, MED or LOW position.
15
Page 16
Controls (cont)
FAN
LO MED HIOFF ON
T156 THERMOSTAT
a42-4192
Line voltage T156 thermostat — Includes thermostat
for 2-pipe or 4-pipe system and manual 3-speed fan control. The special combination allows for the fan coil unit to
have control for the valve cycle only. This thermostat is
only available for unit-mounted line voltage applications.
Integrated Direct Digital Controls (DDC)
Fan Coil Open controller — The factory-mounted con-
troller continuously monitors and regulates the fan coil
operation with reliability and precision. This advanced controller features a sophisticated, factory engineered control
program that provides optimum performance and energy
efficiency. The fan coil open controller also features plugand-play connectively to Carrier’s i-Vu
tem. For added flexibility, the fan coil controller is capable
of stand alone operation, or can be integrated with any
Building Automation System (BAS) utilizing BACnet protocol. Application features include built-in advance control
routines for zone level humidity control, zone level demand
ventilation (ASHRAE 62) and automatic fan speed control
based on demand. System benefits include demand limiting
for maximum energy saving, and compatability with i-Vu
control system tenant billing for tracking tenants after
hours energy usage. Hardware features include onboard
hardware clock, remote occupancy input, and support for
space temperature thermistor sensor for stand alone
operation.
®
Open control sys-
FAN COIL OPEN (OPN-FC)
FAN COIL OPEN CONTROLLER
8
7
9
6
0
5
1
4
2
3
8
7
9
6
0
5
1
4
2
3
16
Page 17
Automatic changeover (Summer-Winter switch) —
G
G2/(W)
G3/(Y)
COM
FAN
(VALVE)
(COOL)
HI
(HEAT)
MED
LO
The automatic-changeover thermostat sensor is a 10,000ohm thermister (33ZCSENCHG) in a moistureproof and
dust-proof enclosure. Cable and temperature sensing element are hermetically sealed in a polypropylene enclosure
with epoxy resin. Device clamps on coil supply pipe with
end snap-on clip.
The set point temperatures are factory set. When water
temperature rises above 80 F (approximately), the sensor
switches to the winter cycle. When water temperature
drops below approximately 70 F, the sensor switches to
the summer cycle. Switch reset is automatic.
Fan coil control relay board — The fan coil relay board
is used in conjunction with the Debonair thermostat or a
controller or the Fan Coil Open controller to regulate a single-speed or multispeed fan. The fan coil relay board can
also be used to connect the fan coil controller to a line voltage valve actuator.
The fan coil relay board is factory shipped as a PC board
with four
1
/2-in. stand-offs attached for field mounting.
NOTE: One fan coil relay board is used for each application. Fan coils with two or more fan motors use a fan coil
relay board for each fan motor. A maximum of three fan
coil relay boards can be wired to one fan coil control.
FAN COIL CONTROL RELAY BOARD
a42-4186
17
Page 18
Selection procedure
Refer to the Carrier Electronic Selection Program for information to determine unit sizing for your needs.
Application data
Basic definitions
Unit hand — When facing the supply air outlet from the
front of the unit (air blowing in your face), your right hand
will be the right hand side of the unit and your left hand the
left hand side of the unit.
Opposite end connection (4-pipe option) — Hot
water (HW) piping connections and electrical will be on the
end (side) opposite the chilled water (CW) and drain
connections.
UNIT HAND
Same end connection (2 pipe or 4 pipe) — All piping
connections are on the same end (side) of the unit. Controls and electrical connection will be on the end (side)
opposite the piping connection.
Standard 2-pipe units will be the same end connection.
SAME END CONNECTION
OPPOSITE END CONNECTION
NOTE: Chilled water piping determines the hand of the unit.
NOTE: Piping determines the hand of the unit.
18
Page 19
Application data (cont)
System piping
The following diagrams show some common methods
used to pipe the 42S Series units. Only the 2-pipe systems
are shown; however, the methods would be the same for
4-pipe systems.
System 1, the “direct return” system, is the most common. It is economical to install since it supplies and returns
the water for a riser column from the same location, at the
top or the bottom of a building. This type of riser arrangement does require more attention to individual unit water
flow balancing. The risers are normally capped at the end
as shown in the diagrams.
System 2, the “reverse return” system, is used to minimize the requirement for individual unit balancing. This
system is usually referred to as the self-balancing system.
The arrangement of the risers allows the water flow for
each unit in a column to be equalized. In the reverse return
system both the supply and return mains are located at the
top or the bottom of a building requiring an additional
return riser to be furnished in the units.
System 3, the “common reverse return” system, typically has the supply and return mains located remotely
from each other — such as one at the top and one at the
bottom of a building. This eliminates the need for a reverse
return riser in the units.
SYSTEM 2 — REVERSE RETURN
SYSTEM 3 — COMMON REVERSE RETURN
SYSTEM 1 — DIRECT RETURN
19
Page 20
Application data (cont)
Risers (42S units)
Riser diameter is an important consideration in the design
of stack series systems. Standard units can accommodate
3
/4-in. to 21/2-in. riser sizes in 2-pipe systems. For other
applications, such as reverse return risers or 4-pipe systems, it may be necessary to accommodate the additional
risers.
Riser size is based on the water flow needed for a given
tier of units. Unit risers are sized according to the diameter
and length requirements as specified by the customer. To
determine riser size, water velocity should be limited to 5 to
8 ft per second. Thus, if 10 units are to be stacked vertically with each unit requiring 3 gpm, the maximum flow in
the risers is 30 gpm. Through 1
ity of 7.5 ft per second. The maximum flow rate of
30 gpm occurs only at the supply and return points. As the
water moves upward, the flow in the supply riser is reduced
1
/4 in. risers, this is a veloc-
MAXIMUM RISER DIAMETER DIAGRAM
by 3 gpm per floor, so that after 3 floors, the total flow is
21 gpm and riser size can be reduced to one inch. See the
Main Riser Pressure Drops chart on page 125.
Condensate drains are available in sizes down to 1 in. for
greater first cost economy.
Riser size-reducers are factory installed and caps are pro-
vided at customer request except for 42SU units.
For risers of over 119 in. length, extension pieces can
be furnished for field installation.
Typical arrangements
Typical arrangement applications for each model type are
shown on page 21. The fan coil units feature almost an
unlimited number of arrangements to meet the needs of
new construction, renovation, or reconstruction. Consult
the factory for the arrangement (standard or special) to
meet your particular need.
UNIT SIZEF DIMENSION
03,0417 in.
06,0820 in.
10,1224 in.
LEGEND
CR — Cold Water Return
CS — Cold Water Supply
DR — Drain
HR — Hot Water Return
HS — Hot Water Supply
NOTES:
1. The F dimension is determined by the following formula: X + A + B + C + D + E + X = F
(where X =
2. The largest diameter riser in each tier must be able to fit in the smallest size cabinet and
not exceed the F dimension.
3. For unit sizes 14-20, contact application engineering.
7
/16 in.)
20
a42-3986
Page 21
TYPICAL ARRANGEMENT APPLICATIONS
a42-3987
21
Page 22
Application data (cont)
42SU ARRANGEMENT OPTIONS
One of the unique traits of the Universal Stack (42SU) is the variety of possible unit arrangements. The
best unit design configuration can be selected by choosing from numerous unit arrangement options
that utilize knockout designs while conserving floor space and reducing installation costs.
Below are just a few pictorials of the many arrangement possibilities of the 42SU fan coil system.
NOTE: Risers ship separately. Units are field connected to risers using factory furnished flex hoses.
LEGEND
Exterior Wall
oom B
R
42SU
Room A
42SU
Room ARoom B
42SU
Room ARoom B
Field Sheetrock
Separation or Utility Chase
Universal Stack Unit
Partition (or Separation) Wall
Hoses for Field Installation
Supply Air
Return Air
The Supply, Return, and Drain risers (2-pipe or
4-pipe applications) can be oriented on any of
three sides of the unit.
HRCRDHSCS
42SU
Cabinet
HRCRDHSCS
HR
HS
D
CR
CS
42SU
Room ARoom B
a42-4261
22
R
S
D
R=Return
D= Drain
S = Suppl
y
2-pipe
a42-4261
HR
ir
D
Return A
HR = Hot Water Return
HS = Hot Water Supply
D=Drain
CR = Cold Water Return
CS = Cold Water Suppl
4-pipe
CRHSCS
y
Page 23
42SM UNIT CONFIGURATION OPTIONS
Mega Stack units (42SM) are designed to be installed either in a small mechanical closet or furred in with
drywall adhered directly to the cabinet. One of the unique traits of the 42SM unit is its optional discharge
plenum. The discharge plenum is a factory-installed option that adds 22-in. to the unit height and provides multiple air duct or supply-air grille connections.
The designer is afforded the luxury of specifying a single unit, which can duct to multiple spaces, direct
discharge to a single space, or provide a combination of the two. If necessary, the plenum can be added
or removed in the field to accommodate design changes.
Below are a few of the many arrangement possibilities of the 42SM fan coil system.
Equipment
installed
in closet with
ducted and
direct discharge
Furred in with
ducted discharge
42SM
LEGEND
Exterior Wall
Field Sheetrock
Partition (or Separation) Wall
Supply Air
a42-4262
Separation or Utility Chase
Mega Stack Unit
NOTE: Risers ship separately. Units should be field connected using factory furnished flex hoses.
Return Air
Field Installed Risers
42SM
a42-4262
23
Page 24
Application data (cont)
PIPING COMPONENTS
SYMBOL/SKETCHDESCRIPTION
MANUAL AIR VENT: Threaded brass needle
valve with screwdriver slot for adjustment.
Application — Body brazed into high point of
heating and cooling coils for bleeding air from
coil. Standard item on all hydronic coils (not
used on steam or DX coils). Should not be
used in lieu of main system air vents.
AUTOMATIC AIR VENT: Nickel plated brass
valve, fiber-disc type, with positive shut-off ballcheck and quick vent feature via knurled vent
screw.
Application — Optional replacement for manual air vent. Automatically passes minute
quantities of air through the fiber discs which
expand upon contact with water, completely
sealing the valve. As air accumulates, the fiber
discs dry and shrink, repeating the cycle. Not
recommended for removing large quantities of
air encountered during initial start-up or subsequent draining and refilling. Should not be
used in lieu of main system air vents.
SWAGE: Copper tube end expanded to accept
a copper tube of the same size for factory or
field brazing.
Application — Used where possible for all tubing joints for best joint integrity.
UNION: Combination wrought copper/cast
brass union assembly, solder by solder.
Application — Used for quick connect (and disconnect) of valve package components to minimize field labor and facilitate servicing of unit.
INSERTION TEST PORT: Brass body valve
for acceptance of test probe (up to
diameter).
Application — Installed on one (or both) sides
of the coil to allow for temperature or pressure
sensing. Used for close tolerance water balancing and service analysis.
PRESSURE TEST PORT: Brass body
vice access fitting with removable depressor
type core.
Application — Installed on both sides of the
coil to allow for pressure sensing. Attach pressure gages to facilitate close tolerance water
balancing.
CIRCUIT SETTER: Variable water flow balancing valve with manual adjustment knob,
pointer, percent-open scale, memory stop and
integral pressure read-out ports.
Application — Used for close tolerance water
flow balancing. Positive shut-off ball valve feature allows usage as combination balancing
and shut-off valve.
LEGEND
Cv — Coefficient of Velocity
DX — Direct Expansion
ETO— Engineering to Order
*Check all system component pressure ratings (coils, values, pumps,
etc.) with manufacturer and any applicable local or national piping
codes prior to specifying system pressure rating.
1
/8 in.
1
/4 ser-
CV FACTORRATING*
1
/
2
3
/
4
PSIF
STEAM
USE
N/AN/A400100NO
N/AN/A125240NO
N/AN/A300200YES
N/AN/A300200YES
N/AN/A250250NO
N/AN/A400210NO
2.123.9300250NO
24
Page 25
PIPING COMPONENTS (cont)
a42-4282
SYMBOL/SKETCHDESCRIPTION
BALANCE VALVE: Variable water flow man-
ual balancing valve with screwdriver slot
adjustment screw.
Application — Often used in conjunction with
test port fittings for water flow balancing. Balance by temperature differential or coil pressure drop (check specifications for service
fittings required if balancing by pressure drop).
May be used in 3-way valve bypass line to permit equal flow balancing.
FIXED FLOW VALVE: Flexible orifice type
(non-adjustable).
Application — Used for water flow balancing.
Valve automatically adjusts the flow to within
10% of set point.
STRAINER: Y-type body with 20 mesh stainless steel screen.
Application — Used for removal of small particles from system water during normal system
operation. Should not be used in lieu of main
system strainers. Strainer screen may have to
be removed during initial high pressure system
flushing during start-up. Screen should be
removed and cleaned per normal maintenance
schedule (provisions for strainer blow-down
not provided).
BALL VALVE: Manual balance and shut-off
valve.
Application — Used for unit isolation and water
flow balancing. Without memory stop feature
water balance point must be marked by
installer (if necessary). Check specifications
for service fittings required when used for
water balancing.
BALL VALVE WITH MEMORY STOP:
Manual balance and shut-off valve.
Application — Used for unit isolation and water
flow balancing. The adjustable memory stop
feature allows return to the balance point after
shut-off. Check specifications for
service fittings required when used for water
balancing.
LEGEND
Cv — Coefficient of Velocity
DX — Direct Expansion
ETO — Engineering to Order
*Check all system component pressure ratings (coils, values, pumps,
etc.) with manufacturer and any applicable local or national piping
codes prior to specifying system pressure rating.
FACTORRATING*
C
V
1
/
2
3
/
4
PSIF
414300250NO
Valve orifice size
determines C
V
factor. The orifice of
these fixed flow
valves changes as
flow is regulated.
As the water pressure increases, the
600220NO
orifice size
decreases, thereby
automatically limiting the flow rate to
the specified gpm
(±10%).
9.0
Clean
19.0
Clean
400150N/A
14.228.6600350YES
14.228.6600350N/A
STEAM
USE
25
Page 26
Application data (cont)
PIPING COMPONENTS (cont)
SYMBOL/SKETCHDESCRIPTION
2-WAY MOTORIZED VALVE (25 PSI close
off differential pressure): Electric 2-position
flow control valve (open/closed). Normally
closed body with manual override lever.
Installed in supply line to unit.
Application — All standard control and valve
packages are based upon normally closed
valves (valve electrically powered open and
closed by spring return when electric power
removed). Manual override lever allows valve
to be placed in the open position for secondary (unit) flushing, constant water flow prior to
start-up, etc. Manual override is automatically
disengaged when valve is electrically activated. Consult factory for normally open
valve applications.
2-WAY MOTORIZED VALVE (150 PSI close
off differential pressure): Electric 2-position
flow control valve (open/closed). Normally
closed body with manual override lever.
Installed in supply line to unit.
Application — All standard control and valve
packages are based upon normally closed
valves (valve electrically powered open and
closed by spring return when electric power
removed). Manual override lever allows valve
to be placed in the open position for secondary (unit) flushing, constant water flow prior to
start-up, etc. Manual override is automatically
disengaged when valve is electrically activated. Consult factory for normally open
valve applications.
3-WAY MOTORIZED VALVE (25 PSI close
off differential pressure): Electric
2-position flow control valve (closed to coil/
open to bypass or open to coil/closed to
bypass). Normally closed with manual override lever. Installed in supply line to unit.
Application — Same comments as 2-way
motorized valve except with manual override
lever engaged the valve is open to both ports
and water flow will take the path of least resistance through the valve package (not necessarily 100% through the coil).
FACTORRATING*
C
V
1
/
2
3
/
4
PSIF
STEAM
USE
YES
3.53.5300200
15
PSI
MAX.
4.910.3300240NO
4.04.0300200N/A
3-WAY MOTORIZED VALVE (150 PSI close
off differential pressure): Electric
2-position flow control valve (closed to coil/
open to bypass or open to coil/closed to
bypass). Normally closed with manual override lever. Installed in supply line to unit.
Application — Same comments as 2-way
motorized valve except with manual override
lever engaged the valve is open to both ports
and water flow will take the path of least resistance through the valve package (not necessarily 100% through the coil).
LEGEND
Cv — Coefficient of Velocity
DX — Direct Expansion
ETO — Engineering to Order
*Check all system component pressure ratings (coils, values, pumps,
etc.) with manufacturer and any applicable local or national piping
codes prior to specifying system pressure rating.
26
4.94.9300240N/A
Page 27
PIPING COMPONENTS (cont)
SYMBOL/SKETCHDESCRIPTION
MODULATING VALVE (Optional)
(Non-Spring Return, Floating Point Actuator): Modulating valves are designed to con-
trol the flow in the circuit by making
incremental adjustments to the flow path
within the valve.
Application — To control fluid flow in fan coil
units.
On the 42DD,SG,SJ,SH commercial fan coil
models, the factory provided modulating valve
has application restrictions. In these models,
the valve packages are located in the airstream, downstream of the coil. Due to the
ambient temperature limitations of the modulating valves, the valves can only be used in
the units listed above with 2-pipe cooling only
systems.
MODULATING VALVE (Optional)
(Non-Spring Return, Proportional Type
Actuator): Modulating valves are designed to
control the flow in the circuit by making incremental adjustments to the flow path within the
valve.
Application — To control fluid flow in fan coil
units.
On the 42DD,SG,SJ,SH commercial fan coil
models, the factory provided modulating valve
has application restrictions. In these models,
the valve packages are located in the airstream, downstream of the coil. Due to the
ambient temperature limitations of the modulating valves, the valves can only be used in
the units listed above with 2-pipe cooling only
systems.
MODULATING VALVE (Requires ETO)
(Spring Return): Modulating valves are
designed to control the flow in the circuit by
making incremental adjustments to the flow
path within the valve.
Application — Same comments as non-spring
return except when powered, the actuator
moves to the desired position, at the same
time tensing the spring return system. When
power is removed for more than two minutes
the spring returns the actuator to the normal
position.
AQUASTAT: Water temperature sensing electrical switch. (Line Voltage Controls)
Application — Clips directly on nominal
1
size
/2 in. or 3/4 in. copper tubing for water
temperature sensing. Must be correctly
located for proper control operation.
FACTORRATING*
C
V
1
/
2
3
/
4
PSIF
4.0300200N/A
4.0300200N/A
4.0
300200
STEAM
USE
N/A
CHANGEOVER SENSOR: Water temperature sensor thermistor.
Application — Sensor shall clamp on the outside diameter of the pipe. Sensor plate shall
bend to allow its radius to be adjusted to fit the
pipe. Sensor shall be secured to the pipe with
mounting clamp. Insulate the mounting location of sensor on the pipe.
LEGEND*Check all system component pressure ratings (coils, values, pumps,
Cv — Coefficient of Velocity
DX — Direct Expansion
ETO — Engineering to Order
etc.) with manufacturer and any applicable local or national piping
codes prior to specifying system pressure rating.
27
Page 28
a42-213tf
Application data (cont)
Valve packages
There are limitations on physical size of pneumatic valves,
quantity and type of matching components, and required
control interface. See Symbols and Placement of Valves
diagram.
Consult factory before ordering any special valve pack-
age components that are not covered in this book.
SYMBOLS AND PLACEMENT OF VALVES
Valve packages are shipped with the units or in unit cartons. Valve packages include belled ends for field soldering
to coil connections.
All factory-furnished cooling valve packages are
arranged to position as much of the package as possible
over an auxiliary drain pan or drip lip. This helps minimize
field piping insulation requirements.
a42-4222
Coil Connections (Positions A & B) — When isolation valve only is added to supply or return line, the isolation valve will be factory
brazed to the coil stub-out. Addition of any other component or connection to the supply or return line will change the respective coil
connection(s).
Service Fittings (Positions C & D) — Optional fittings for attaching pressure/temperature sensing devices to obtain pressure drop or temperature differential across coil. Used with ball valve or balance valve where extremely accurate water flow balancing is required.
Water Flow Balancing (Positions E, F, & H) — Only one device per total valve package to be used for balancing water flow through the
coil. When isolation valve (ball valve or ball valve with memory stop at position H) is used for water flow balancing, do not specify additional
balancing device at position E or F. When balancing device is specified at position E or F, isolation valve does not require balancing feature
at position H (with a 3-way motorized valve, a bypass balancing valve may be specified in the bypass line to permit equal flow balancing).
Strainer (Position G) — Does not include blow down fitting and should not be used in lieu of main piping strainers.
Isolation Valves (Positions H & J) — Normally requires one each on supply and return line (see exception under circuit setter). When
position H is used for balancing (ball valve or ball valve with memory stop), check specifications for service valve requirements.
28
Page 29
VALVE PACKAGE ARRANGEMENTS
a42-3988
LEGEND
Ball Valve
M
Ball Valve with Memory Stop
Circuit Setter
M
Motorized 2-Way Valve
M
Motorized 3-Way Valve
*When aquastat is used for automatic changeover, bypass is required as
indicated by dashed line.
NOTES:
1. Packages factory furnished and field installed (except 42S units).
2. Valves are
3. If an automatic flow control valve is added, it will be located on supply line
between shutoff valve and coil (or motorized control valve, if supplied).
4. Packages 17-A,C,D,E,F,J,K,L, and P are listed on current price pages.
5. Modulating control valve is installed in return line (not shown).
5
/8-in. ODS unless otherwise specified.
29
Page 30
Application data (cont)
VALVE PACKAGE SPACING RECOMMENDATIONS
PLENUM
CABINET
42VAA (SEE NOTE 3)
25"
VALV E
PACKAGE
AREA
9-1/4"
9-1/2"
COIL
VALV E
PACKAGE
AREA
DRAIN PAN
42CEA, DCA (SEE NOTES 1, 2)
NOTES:
1. Valve package dimensions on ceiling models are based on a 4-pipe unit with (1) 3-way
control valve, (1) ball valve, and (1) circuit
setter.
2. Coil height dimensions on 42CEA and
42DCA are provided in the physical data
section of the product data.
3. Valve package dimensions on floor units are
based on the valve package space provided
on the exposed floor models.
4. Height of the 42VCA is 16
on coil and electric heat selection.
3
/8 in. depending
24"
HEIGHT OF COIL
18"
CABINET
42VCA (SEE NOTES 3, 4)
VALV E
PACKAGE
AREA
9-1/2"
A42-4263
14-3/8"
(SEE
NOTE 4)
12-1/4"
30
Page 31
Cv FACTOR VS WATER PRESSURE DROP
CV FACTO R :
The flow rate in gallons per minute (gpm) through a piping component when the pressure drop ('P) in pounds per square inch (psi)
across the component is 1.0 (psi).
Pressure drop (ft-H
O) = 2.31 x psi (pressure drop)
2
GRAPH EXAMPLE:
'P for 2.0 gpm through a component with a C
FORMULA EXAMPLE:
'P (ft-H
O) =
2
(gpm)
(C
v
2
)
x 2.31 =
(2.0)
(1.0)
2
TOTAL PRESSURE DROP is the Sum of the pressure drop of all piping and components in the water flow path.
CFM — Cubic Feet per Minute
Cs— Sensible Airflow Correction Factor
Ct— Total Airflow Correction Factor
TOTAL (Ct)SENSIBLE (Cs)
225
200
175
150
125
100
75
MAXIMUM WATER TEMPERATURE DIFFERENCES (ºF)
50
25
0
.000.005.030.025.020.015.010.035
EXPANSION (INCHES PER FOOT)
32
Page 33
Electric heat
Electric heaters are available for installation on Carrier fan
coil units in the following applications.
Total electric heat — This system provides complete
heating during the heating season; no boiler is required.
Heating and cooling are now available on an individual
basis throughout the year with a 2-pipe system.
Chilled water is used for cooling and the electric heater is
used for heating. Individual room controls can be supplied
for either manual or automatic changeover.
Auxiliary electric heat — This system is used for heating between seasons or during the cooling season when
chilled water is being circulated. Individual room controls
are supplied to provide electric heat only when chilled
water is being circulated through the system. Water flow
through the unit is shut off when the heater is turned on.
During the winter heating season, heating is provided by
hot water circulated through the system. A changeover
device locks out the electric heat when the hot water is
circulated.
Heater construction
Strip heaters are used with Model 42C ceiling units,
Model 42D ducted units, Model 42S stack units and Model
42V (except 42VC and VE).
These heaters consist of coils of the highest grade resistance wire, insulated by ceramic insulators on plated steel
brackets. High limit thermal cutouts protect the unit in the
event of airflow loss.
All heaters except those used in 42S stack units are positioned on the incoming (preheat) side of the unit coil. On
42S stack units, the strip heater is located in the fan discharge on the leaving side of the coil.
Sheath heaters are used with Model 42VC and 42VE
vertical units. There heaters consist of the highest grade
resistance wire, centered in a
1
/2 in. diameter copper
plated steel sheath. The wire is insulated from the sheath
by magnesium oxide powder packed around it. To increase
the heater surface exposed to air, a 1
1
/4 in. OD fin of copper plated steel is wound around the sheath in a spiral that
makes 5 turns per linear inch. Sheath and fin are permanently bounded together by copper brazing. The heaters
are positioned on the leaving (rehead) side of the unit coil.
Heater electrical data
1. Load voltage may be 120, 208, 240 or 277 volts. For
unit size and kW limitations, refer to the specific unit
catalogs.
2. All heaters are single stage and single phase except for
42SM, which offers 2-stage electric heaters.
3. Unless a single power-source option is selected, the
electric heat units require 2 separate power sources.
With the single power-source option, only one line circuit need be brought into the unit. Fuse protection is
added to the motor/control circuit to protect these
components. This is separate from the field-furnished
total unit overcurrent protection.
MODEL 42C CEILING UNIT
WITH ELECTRIC STRIP
HEATER
33
Page 34
Application data (cont)
42C SERIES
HEATER ELECTRICAL DATA
HEATER
VOLTAGE
120
208
240,277
HEATER
VOLTAGE
120
208,
240
277
NOTE: All heaters are single-stage and single-phase. Contact your
Carrier representative for heater availability for 220-1-50 units.
CAPACITY
kW
10.034,150*
kW
1.0 3,415 ****
1.55,123***
2.06,830***
3.010,245****
1.0 3,415 ****
1.55,123***
2.06,830***
3.010,245****
4.013,660***
1.0 3,415 ****
1.55,123***
2.06,830***
3.010,245****
4.013,660***
5.017,075**
6.020,490*
(Btuh)
0.51,708**
1.0 3,415 *****
1.5 5,123 *****
2.0 6,830 *******
3.0 10,245******
0.51,708**
1.0 3,415 *****
1.5 5,123 *****
2.0 6,830 *******
3.0 10,245******
4.0 13,660****
5.0 17,075****
6.0 20,490****
8.027,320**
0.51,708**
1.03,415***
1.55,123***
2.0 6,830 *******
3.0 10,245******
4.0 13,660****
5.0 17,075****
6.0 20,490****
8.027,320**
CAPACITY
(Btuh)
02 03 04 06 08 10 12
42V SERIES
02 03 04 06 08 10 12
UNIT SIZE
UNIT SIZE
42D SERIES
HEATER
VOLTAGE
120
208,
240,
277
NOTE: All heaters are single-stage and single-phase.
HEATER
VO LTAGE
120
208
240
277
NOTES:
1. Contact your Carrier representative for heater availability on 42SU
unit quick ship program.
2. 12 kW heater only available with 277V heater voltage.
CAPACITY
kW
(Btuh)
2.06,830***
3.010,245***
2.06,830***
3.010,245***
4.013,660********
5.017,075*******
6.020,490*******
7.023,905******
8.027,320*****
9.030,735*****
10.034,150****
12.040,980***
14.047,810*
kW
030406081012141620
1.0******
1.5******
2.0******
3.0******
1.0******
1.5******
2.0******
3.0******
4.0********
5.0****
6.0*******
8.0******
1.0******
1.5******
2.0******
3.0******
4.0********
5.0****
6.0*******
8.0******
10.0*****
1.0******
1.5******
2.0******
3.0******
4.0********
5.0****
6.0*******
8.0******
10.0*****
12.0***
06 08 10 12 14 16 18 20
42S SERIES
UNIT SIZE
UNIT SIZE
34
Page 35
ECM motor control methods
L2
LOW
MED
HIGH
VR1
VR2
VR3
K1
K2
K3
LOW
MED
HIGH
COM
C1
C2
C3
CR1
There are three main control methods to control the speed
of electronically commutated motor (ECM) for desirable airflow for a given application.
3-discrete speed input, potentiometer field speed
adjustment — This method uses the ECM with potenti-
ometer field adjustment. The relay board will have three
main circuits for HI, MEDIUM, and LOW speed. Each of
these speeds can be adjusted by potentiometer to any value
in the motor’s operating range. This will allow the customization of air flow on each speed of the fan coil unit to better suit any requirements.
3-DISCRETE SPEED INPUT
4-discrete speed input, potentiometer field speed
adjustment, solid state (only with 24-v controls by
other option) — This is the same as 3-discrete speed in-
put but with additional fourth speed. All 4 speeds can be
adjusted by potentiometer to any value in the motor’s
operating range.
Control method no. 3 — ECM variable speed (only
with 24-v controls by other option) — This method
requires 0 to 10-v signal for fan speed. It has no predetermined fan speeds and will ramp the motor fan speed according to the controller used on the fan coil unit. All ECM
motor packages use a constant torque operating mode. An
ETO request is required for pricing and availability of constant airflow operation.
4-DISCRETE SPEED INPUT
Neutral
24Vac
EVO/ECM
45pd-51
Status
Com
Flo0
FloCom
Flo1
Flo1
Flo3Flo2
Flo3Flo2
Flo4
+5V
Flo4
35
Page 36
Model number nomenclature
42C Series Units
Design Series (A or B*)
* Model 42CG only.
† Contact Application Engineering for data on the 50 Hz motor.
a42-4374
Motor Options
1 – 120-v High-Static Permanent Split Capacitor (HSPSC)
2 – 208/1/60 HSPSC
3 – 230/1/60 HSPSC
4 – 277/1/60 HSPSC
A – 120-v Electonically Commutated Motor (ECM)
with Control Option 1
B – 120-v ECM with Control Option 2
C – 120-v Permanent Split Capacitor (PSC) (Standard)
D – 208/1/60 PSC
E – 230/1/60 PSC
F – 277/1/60 PSC
G – 120-v ECM with Control Option 3
H – 208-v ECM with Control Option 1
J – 208-v ECM with Control Option 2
K – 208-v ECM with Control Option 3
L – 230-v ECM with Control Option 1
M – 230-v ECM with Control Option 2
N – 230-v ECM with Control Option 3
P – 277-v ECM with Control Option 1
Q – 277-v ECM with Control Option 3
R – 277-v ECM with Control Option 2
V – 220/1/50 PSC†
Control Option 1 – 3-Discrete Potentiometer
Field Speed Adjustment
Control Option 2 – Variable Flow 0-10 VDC
or 4-20 mA
Control Option 3 – 4-Discrete Potentiometer
Field Speed Adjustment
36
Page 37
AHRI capacity ratings
42C Series Units
The 42C Series fan coil units are certified in compliance
with the Air-Conditioning, Heating and Refrigeration Institute (AHRI) Industry Standard 440 for room fan coil units.
Approved standard ratings are tabulated below.
AHRI APPROVED STANDARD RATINGS*
UNIT
42CA,CE,CG,CK
LEGEND
GPM — Gallons per minute
MBtuh — Capacity (Btuh in thousands)
*Ratings based on motor at high fan speed, standard air and dry coil oper-
ation, 10° F water temperature rise; entering-air temperature 67 F wb;
80 F db; entering water temperature 45 F.
†Motor type permanent split capacitor operating at 115-1-60 voltage.
COIL WATER WEIGHT
(Approx lb per row of coil)
42CA, CE, CG, CK0.70.81.01.41.72.32.7
COILS
FPI10 fins/inch
Coil Face Area (sq ft)0.81.11.41.92.33.23.7
MOTOR (qty)
42C Series111 1 122
BLOWER (qty)
42CA, CE, CG, CK112 2 2 44
FILTERS
Nominal Size (in.) (1-in. thick)
42CANANANANANANANA
42CE†10 x 1810 x 2210 x 2810 x 3310 x 4010 x 5410 x 62
42CG
Bottom Return10 x 23
Rear Return8 x 231/
42CK
Bottom Return10 x 2810 x 2810 x 3310 x 4510 x 4510 x 6210 x 62
Rear Return7 x 217 x 217 x 277 x 387 x 387 x 527 x 52
Qty 111 1 111
1— Junction Box, 4 in. x 4 in.
2— Strip Heater High Limit
3— Electric Strip Heater Element
4— Optional Drip Lip, shipped loose
5— Mounting Holes (4), Rubber Grommets
ECM — Electronically Commutated Motor
ESP— External Static Pressure
PSC— Permanent Split Capacitor
SCFM — Square Cubic Feet per Minute
60
Med
Low
4-Row
High
SCFM
ECM Operating Range:
Page 61
AIR DELIVERY FAN CURVES (cont)
PSC Motor Fan Curve: 3-Row-5-Row
4-Row
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
350450550650750850950105011501250135014501550
ESP (in. wg)
Low
Med
High
-
42C Series Units
42CE SERIES — 12 UNIT SIZE
SCFM
ECM Operating Range:
LEGEND
ECM — Electronically Commutated Motor
ESP— External Static Pressure
PSC— Permanent Split Capacitor
SCFM — Square Cubic Feet per Minute
61
Page 62
Performance data (cont)
42C Series Units
42CA HORIZONTAL FURRED-IN CEILING UNIT
SOUND POWER DATA
UNITRATING
CASING
RADIATED
02
DUCTED
DISCHARGE
CASING
RADIATED
03
DUCTED DIS-
CHARGE
CASING
RADIATED
04
DUCTED
DISCHARGE
CASING
RADIATED
06
DUCTED
DISCHARGE
CASING
RADIATED
08
DUCTED
DISCHARGE
CASING
RADIATED
10
DUCTED
DISCHARGE
CASING
RADIATED
12
DUCTED
DISCHARGE
NOTES:
1. Unit Test Configuration: Open Return / Front Supply, 3 Row, 10
FPI (fins per inch) Coil, 0.0 in. ESP at High Speed, 115 VAC PSC
(permanent split capacitor) Motor.
2. Casing Radiated Testing per AHRI (Air-Conditioning, Heating and
Refrigeration Institute) 260-2012: 4.2.2.3 Casing radiated with free
inlet, Sound Rating of Ducted Air Moving and Conditioning Equipment.
3. Ducted Discharge Testing per AHRI 260-2012: 4.2.2.1 Ducted discharge, Sound Rating of Ducted Air Moving and Conditioning
Equipment.
4. Sound power data is expressed decibels, dB RE: 1 x 10
(picowatts).
FAN
SPEED
H2805856575652484360
M2005250514944383753
L1654845454337333747
H2805653524845383854
M2005147464137323647
L1654843413531303643
H3005855585754494461
M2105247494742373751
L1655043434136323646
H3005552535047403855
M2105046474238323548
L1654842413632303543
H6256462636260565267
M4155853545247423956
L3155346474438333748
H6256757595752464361
M4156248494540333651
L3155743423731303645
H7506763636259555266
M4605951524945403854
L3505444434136323646
H7506763636259555266
M4605951524945403854
L3505444434136323646
H8756566676663605771
M7206261626157545065
L4255348494641363651
H8757362636257545166
M7207259595752484562
L4256345464135323550
H12206767676763605671
M8406257595651474260
L6455851524842373653
H12206862646256524966
M8406554555144393756
L6456247484336313450
H15256868696965625973
M13306565666561575469
L8205653555146413856
H15256864666459565268
M13306561636055514865
L8205649524640353552
CFM
SOUND POWER LEVEL, Lw (dB one reference pico watt) - Hz
125 Hz250 Hz500 Hz1000 Hz2000 Hz4000 Hz8000 Hz
A-wgt
(dBA)
-12
W
62
Page 63
UNITRATING
42C Series Units
42CE HORIZONTAL FURRED-IN WITH PLENUM CEILING UNIT
SOUND POWER DATA
SOUND POWER LEVEL, Lw (dB one reference pico watt) - Hz
FAN
SPEED
CFM
125 Hz250 Hz500 Hz1000 Hz2000 Hz4000 Hz8000 Hz
A-wgt
(dBA)
02
03
04
06
08
10
12
CASING
RADIATED
DUCTED
DISCHARGE
CASING
RADIATED
DUCTED DIS-
CHARGE
CASING
RADIATED
DUCTED
DISCHARGE
CASING
RADIATED
DUCTED
DISCHARGE
CASING
RADIATED
DUCTED
DISCHARGE
CASING
RADIATED
DUCTED
DISCHARGE
CASING
RADIATED
DUCTED
DISCHARGE
H2505957575146403857
M1705753524540353752
L1355549484034313648
H2506053534845393754
M1705748484340333649
L1355444433734303645
H2855758585047433958
M1955050504137333649
L1404645443530313644
H2855651524946403754
M1955246464239333548
L1404941413732303543
H5106564635853484464
M3606257565044383756
L2655950494336323750
H5106859615854474363
M3606451534944373755
L2656045474236313649
H6606564625752484463
M4105853534539343653
L3105347453731313646
H6606659605752484462
M4105848494539343651
L3105342423730303644
H7706668655956535066
M6506465625551484463
L3905751504236323550
H7706863636257545066
M6506759595752494462
L3906146464236323549
H9956770666156514667
M7006561595246413759
L5406253534438323553
H9957063646256524766
M7007155575347413659
L5406849514539333454
H13056770696358555169
M11456568666055524766
L7005655554741363655
H13056765666459565168
M11456462636156524765
L7005550534842363553
NOTES:
1. Unit Test Configuration: Open Return / Front Supply, 3 Row, 10
FPI (fins per inch) Coil, 0.0 in. ESP at High Speed, 115 VAC PSC
(permanent split capacitor) Motor.
2. Casing Radiated Testing per AHRI (Air-Conditioning, Heating, and
Refrigeration Institute) 260-2012: 4.2.2.3 Casing radiated with free
inlet, Sound Rating of Ducted Air Moving and Conditioning Equipment.
3. Ducted Discharge Testing per AHRI 260-2012: 4.2.2.1 Ducted discharge, Sound Rating of Ducted Air Moving and Conditioning
Equipment.
4. Sound power data is expressed decibels, dB RE: 1 x 10
(picowatts).
1. High-static PSC motors are available on 42CA,CE,CK for 60 Hz voltages
with a special quote.
1
/
12
1
/
12
1
/
6
1
/
6
1
/
5
1
/
6
1
/
5
UNIT SIZE
Nominal
Hp
Watt sAmps
2862.80
1
/12 (2)
2451.38
1
/12 (2)
2811.38
1
/12 (2)
2881.38
1
/12 (2)
1.459
1.4100
2.5195
2.5195
3.6277
5.0360
7.2513
2. Motor amps and watts based on 115V motors.
Nominal
Hp
1
/6 (2)
1
/6 (2)
1
/6 (2)
1
/6 (2)
WattsAmps
3995.00
3252.60
3562.60
4261.82
64
Page 65
42C ECM MOTOR DATA
42C Series Units
SIZENOMINAL HP
1
1
/6 (2)
1
/6 (2)
/
7
1
/
7
1
/
6
1
/
6
1
/
6
42C*02
42C*03
42C*04
42C*08
42C*10
42C*12
AMPS
120V208V230V277V
1.41.31.2
2.4
1.61.51.042C*06
3.23.02.0
65
Page 66
Design Series (A or C*)
Motor Options
1 – 120-v High-Static Permanent Split Capacitor (HSPSC)
2 – 208/1/60 HSPSC
3 – 230/1/60 HSPSC
4 – 277/1/60 HSPSC
A – 120-v Electonically Commutated Motor (ECM)
with Control Option 1
B – 120-v ECM with Control Option 2
C – 120-v Permanent Split Capacitor (PSC) (Standard)
D – 208/1/60 PSC
E – 230/1/60 PSC
F – 277/1/60 PSC
G – 120-v ECM with Control Option 3
H – 208-v ECM with Control Option 1
J – 208-v ECM with Control Option 2
K – 208-v ECM with Control Option 3
L – 230-v ECM with Control Option 1
M – 230-v ECM with Control Option 2
N – 230-v ECM with Control Option 3
P – 277-v ECM with Control Option 1
Q – 277-v ECM with Control Option 3
R – 277-v ECM with Control Option 2
V – 220/1/50 PSC†
* Model 42VA, VB, and VF.
† Contact Application Engineering for data on the 50 Hz motor.
VA
Control Option 1 – 3-Discrete Potentiometer
Field Speed Adjustment
Control Option 2 – Variable Flow 0-10 VDC
or 4-20 mA
Control Option 3 – 4-Discrete Potentiometer
Field Speed Adjustment
Model number nomenclature
42V Series Units
66
Page 67
AHRI capacity ratings
42V Series Units
The 42V Series fan coil units are certified in compliance
with the Air-Conditioning, Heating and Refrigeration Institute (AHRI) Industry Standard 440 for room fan coil units.
Approved standard ratings are tabulated below:
AHRI APPROVED STANDARD RATINGS*
UNIT
42VA,VB,VF
42VG
42VC,VE
LEGEND
GPM — Gallons per minute
MBtuh — Capacity (Btuh in thousands)
*Ratings based on motor at high fan speed, standard air and dry coil oper-
ation, 10° F water temperature rise; entering-air temperature 67 F wb;
80 F db; entering water temperature 45 F.
†Motor type permanent split capacitor operating at 115-1-60 voltage.
0220016 x 516 x 616 x 516 x 6
0330018 x 516 x 622 x 522 x 6
0440026 x 526 x 630 x 530 x 6
0660036 x 536 x 644 x 544 x 6
0880038 x 538 x 6——
10100052 x 552 x 6——
12120060 x 560 x 6——
*Refer to unit dimensions to size field transitions.
Recommended Grille Sizes (in.)
42VA42VB,VF42VC*42VE
Unit
ANODIZED ALUMINUM DOUBLE-DEFLECTION
GRILLE (With Frame)
INTEGRAL DOUBLE-DEFLECTION GRILLE
FOR VERTICAL UNITS
A42-4118
82
Page 83
Performance data
42V Series Units
AIR DELIVERY (CFM)
42V SERIES — 60 Hz PSC MOTOR
UNITSIZECOIL
023-Row147208244222201180
03
04
42VA,VB,VF
42VC,VE
NOTE: Air delivery is based on operation with PSC motors, dry coils and clean air filter.
CFM AT 0.0 ESP FOR FAN SPEEDHIGH SPEED CFM AT ESP INDICATED
LOWMEDHIGH0.050.10.150.2
159
SOUND POWER DATA
42VA, VB, AND VF VERTICAL FLOOR FAN COIL UNITS
UNIT
SIZE
02
03
04
06
08
10
12
NOTES:
1. Testing in compliance with AHRI (Air-Conditioning, Heating, and
Refrigeration Institute) 350, Sound Performance Rating of NonDucted Indoor Air-Conditioning Equipment.
2. Sound power data is based on an exposed cabinet model with
115/1/60 PSC motor, 3 row coil, standard 1-in. throwaway filter and
standard louvered discharge.
3. Sound power data is expressed decibels, dB RE: 1 x 10
(picowatts).
*Total motor amps and watts shown for units with 2 motors.
NOTES:
1. Motor nameplate amps may vary.
2. Fan coil units comply with ETL, Canadian Standards Association
(CSA), and ETL of Canada standards.
FAN
SPEED
(RPM)
FAN
SPEED
Nominal
Hp
1
/
20
1
/
20
1
/
20
1
/
20
Nominal
Hp
1
/
12
1
/
12
1
/
12
1
/
12
UNIT SIZE
0203
Watt sAmps
Nominal
Hp
680.60
1
/
12
560.50
640.50
1
/
12
1
/
12
850.30
1
/
12
UNIT SIZE
0406*
WattsAmps
Nominal
Hp
1501.60
1
/12 (2)
1160.66
1380.66
1
/12 (2)
1
/12 (2)
1400.50
1
/12 (2)
WattsAmps
1351.60
1090.66
1280.66
1350.50
Watt sAmps
2603.20
2321.32
2451.32
2601.00
42VG PSC MOTOR DATA
V-P h-Hz
FAN
SPEED
FAN
SPEED
(RPM)
Nominal
Hp
H1200
115-1-60
M 980 831.001671.91
1
/
20
L 790 690.801381.54
*Total motor amps and watts shown for units with 2 motors.
NOTES:
1. Motor nameplate amps may vary.
2. Fan coil units comply with ETL, Canadian Standards Association
(CSA), and ETL of Canada standards.
0103*
WattsAmps
1351.60
UNIT SIZE
Nominal
Hp
1
/20 (2)
WattsAmps
2703.20
85
Page 86
Electrical data (cont)
42V Series Units
42VA, VB, VC, VE, VF ECM MOTOR DATA
SIZENOMINAL HP
1
1
/6 (2)
1
/6 (2)
/
7
1
/
7
1
/
6
1
/
6
1
/
6
42V*02
42V*03
42V*04
42V*06
42V*08
42V*10
42V*12
AMPS
120V208V230V277V
1.41.31.2
2.4
1.61.51.0
3.23.02.0
86
Page 87
B
w
w
w
A – 120V Electronically Commutated Motor
(ECM) with Control Option 1
B – 120V ECM with Control Option 2
C – 120V PSC-STD
D – 208/1/60 PSC
E – 230/1/60 PSC
F – 277/1/60 PSC
G – 120V ECM with Control Option 3
H – 208V ECM with Control Option 1
J – 208V ECM with Control Option 2
K – 208V ECM with Control Option 3
L – 230V ECM with Control Option 1
M – 230V ECM with Control Option 2
N – 230V ECM with Control Option 3
P – 277V ECM with Control Option 1
Q – 277V ECM with Control Option 3
R – 277V ECM with Control Option 2
V – 220/1/50 PSC*
Control Option 1 – 3-Discrete Potentiometer
Field Speed Adjustment
Control Option 2 – Variable Flow 0-10 VDC
or 4-20 mA
Control Option 3 – 4-Discrete Potentiometer
Field Speed Adjustment
* Contact Application Engineering for data on the 50 Hz motor.
Model number nomenclature
42D Series Units
LEGEND
PSC — Permanent Split Capacitor
* Contact Application Engineering for Data on the 50Hz motor.
AHRI capacity ratings
The 42D Series fan coil units are certified in compliance
with the Air-Conditioning, Heating and Refrigeration Institute (AHRI) Industry Standard 440 for room fan coil units.
Approved standard ratings are tabulated below:
UNIT
TYPE
42DF
*Ratings based on motor at high fan speed, standard air and dry coil
operation, 10°F water temperature rise; entering-air temperatures of
80 F db, 67 F wb; entering-water temperature 45 F.
*Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves,
and other components.
NOTES:
1. Right hand unit shown; left hand unit opposite. Coil connection locations are ±
5
/8 inches.
2. Standard 4-row coil shown. Other coil option dimensional data available on request.
3. Sizes 06, 08 and 10 have one motor, one blower. Sizes 12 through 20 have 2 motors, 2
blowers.
4. Supply and return connections terminate within unit when valves are factory installed.
5. See 42DD-203-1 for optional coil connections.
6. Fan switch and wall plate are not shown.
7. Galvanized finish provided as standard.
8. Units with internal factory valve packages have external connections located in triangular section above coil.
9. Consult Carrier for ducted front return air and external filter rack with 1-in. duct collar
and throwaway filters.
10. Units with electric heat require additional access on the side of unit for servicing contactor box.
11. With bottom return, access to filter is through the front access panel.
NOM
AIRFLOW
(Cfm)
DIMENSIONS (in. ±
ABCBlowerMotor
1
/8)QTY/UNITUNIT
WEIGHT*
(lb)
1— Motor Junction Box
2— Air Vent,
3— Return Connection (See table on page 95.)
4— Optional 6-in. Legs
5— Bottom Return (optional)
6— Return Air Opening
7— Supply Connection (See table on page 95.)
8— Drain Connection,
9— Front Access Panel
10 — Filter, Throwaway
11 — Electric Strip Heater Element (optional)
12 — Supply Duct Connection, 1-in.
13 — Drain Pan
LEGEND
1
/8-in. MPT
A42-4122
7
/8-in. OD
12. Dimensions are in inches (mm).
91
Page 92
42DE CEILING UNIT WITH FULL CASING AND ELECTRIC HEAT
*Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components.
NOTES:
1. Right hand unit shown; left hand unit opposite.
2. Coil stub-out location data available on request.
3. Unit fabricated of galvanized steel.
4. Internal parts fabricated of galvanized steel.
5. Sizes 06, 08 and 10 have one motor, one blower. Sizes 12 through 20 have
2 motors, 2 blowers.
6. Units must have drain line pitched and trapped externally.
NOTE: Ratings based on standard cfm at sea level, 70 F entering dry
coil. Ratings include factory-installed filter and/or grille, where
applicable.
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97
Page 98
Performance data (cont)
42D Series Units
42DA HORIZONTAL FURRED-IN DUCTED UNIT
SOUND POWER DATA
UNIT
SIZE
06
08
10
12
14
16
18
20
NOTES:
1. Unit Test Configuration: Open Return / Front Supply, 4 Row, 10
FPI (fins per inch) Coil, 0.20 in. ESP at High Speed, 115 VAC PSC
(permanent split capacitor) Motor.
2. Casing Radiated Testing per AHRI (Air-Conditioning, Heating and
Refrigeration Institute) 260-2001: 4.2.2.3 Casing radiated with free
inlet, Sound Rating of Ducted Air Moving and Conditioning Equipment.
3. Ducted Discharge Testing per AHRI 260-2012: 4.2.2.1 Ducted discharge, Sound Rating of Ducted Air Moving and Conditioning
Equipment.
2. In all units using over 48 amps, the heating elements are subdivided and protected. Additional cost is incurred because of
added components.
3. A separate power source is required for motor and heaters except
when motors and heaters of same voltage are ordered in conjunction with a single power source wiring option. This option, which
meets NEC (National Electric Code) requirements, consists of a
factory-furnished and installed junction box and fuse for 6.25 amp
(max) fan and control circuit connection to a single power source.
Power supply circuit to unit must be field furnished and installed in
accordance with applicable codes.
42DA PSC MOTOR DATA
UNIT SIZE
Nominal
Hp
1
1
1
/
4
/
4
/
4
WattsAmps
4705.60
4302.00
4251.62
Nominal
Hp
1
/8 (2)
1
/5 (2)
1
/5 (2)
WattsAmps
5505.30
4502.10
5502.40
V-P h- Hz
115-1-60
208/230-1-60
277-1-60
FAN
SPEED
H1200
M
L
H1200
M
L
H
M
L
FAN
SPEED
(RPM)
Nominal
Hp
1
9802002.002252.253603.703052.92
/
06081012*
WattsAmps
2802.70
8
Nominal
Hp
1
/
5
WattsAmps
3303.10
7901401.501351.442402.602051.93
10
2401.10
1
1
9801750.742801.262601.203251.45
/
/
5
4201.80
7901100.501550.731650.802151.00
1200
9801750.691750.692601.043551.38
1
/
5
2751.15
/
5
2751.21
1
790900.33900.341550.651750.67
V-P h-Hz
FAN
SPEED
115-1-60
208/230-1-60
277-1-60
*Total motor amps and watts shown for units with 2 motors (size 12 through 20).
NOTES:
1. Motor nameplate amps may vary.
2. Fan coil units comply with ETL, Canadian Standards Association
(CSA), and ETL of Canada standards.