Trane CAB-PRC001-EN User Manual
Force–Flo™ Cabinet Heater
Air Terminal Devices
Horizontal and Vertical
Sizes 02-12
December 2000
CAB-PRC001-EN
It isn’t just a fan and a coil…
The Trane Company has redesigned the traditional cabinet heater to lead the indus-
try in:
• indoor air quality (IAQ) features
• easy installation and maintenance
• high quality and durability
• advanced controls
Factory installed
and tested controls
Easy to remove fan assembly
16-gauge steel construction
Smaller unit footprint
Easy filter access
without front panel
removal
Quiet operation
Two, three or
four-row coils
Cleanable closedcell insulation
(non-fiberglass)
Fresh air damper for
ventilation
Factory assembled,
installed and tested
piping package
©American Standard Inc. 2000 CAB-PRC001-EN
Contents
Introduction 2
Features and Benefits 4
Selection Procedure 5
Model Number Description 5
General Data 7
Performance Data 18
Hot Water Coils 19
Steam Coils 22
Controls 24
Electrical Data 30
Dimensions and Weights 34
Mechanical Specifications 50
Options 52
CAB-PRC001-EN 3
Features and Benefits
The Force–Flo™ cabinet heater meets the
standards of today’s market, as well as
the anticipated needs of tomorrow’s
market. The tradition that company
founder Reuben Trane began in 1913
continues with the latest generation of
cabinet heaters from Trane.
The Force–Flo cabinet heater is the leader
in these key areas:
• Indoor Air Quality (IAQ)
• Controls
• Flexibility
• Quality
• Serviceability
Today’s HVAC market is concerned with
issues such as indoor air quality (IAQ)
and CFCs that demand a change in HVAC
products. In addition, renovation has
overtaken new construction in the
cabinet heater market—demanding a
design that caters to renovation issues.
Trane is concerned with these issues,
too. That’s why we designed the Force–
Flo cabinet heater as an integral part of
the company’s system solutions with
standard IAQ-related features that fully
comply with ASHRAE 62.
IAQ Design
• Closed-cell insulation is standard on all
units to help prevent fiberglass in the
airstream.
• Easy filter access encourages frequent
changing.
• Force–flo cabinet heaters have a blowthru design.
Controls
• All controls are factory-mounted and
tested to minimize field setup.
• Controls are wired with a 24 VAC
transformer to keep only a single
source power connection requirement
to the unit.
• All wall-mounted zone sensors require
only low voltage control wiring from
the device to the unit control box. (No
line voltage.)
• The Tracer
the latest in control technology with the
ZN.010, ZN.510, and ZN.520 controllers.
• The random start-up feature helps
reduce electrical demand peaks by
randomly staggering multiple units at
start-up.
• Occupied/unoccupied operation allows
the controller to utilize unoccupied
temperature setpoints for energy
savings.
• Warm-up energy feature is standard
with Trane controls.
• Continuous fan or fan cycling is available with ZN.010 or ZN.510.
• Monitor unit operation using Tracer
Summit building management system
with ZN.510 or ZN.520.
• To customize unit control, Tracer
Summit or Rover
field modification of ZN.510 and ZN.520
default settings. For ZN.010, use Rover
to field modify default settings.
• Maximize cabinet heater system
efficiency with modulating valves on
units with ZN.520.
Flexibility
• Two, three, and four-row hot water coils
allow greater design flexibility. Steam
distributing or electric heat coils are
also available.
• Fan motors are available for either high
static (0.4-inch external static pressure)
or free discharge applications.
• Piping is factory assembled, mounted
and tested. Units are also available
without piping.
• Factory piping options include intercon-
®
controls family introduces
™
software will allow
®
necting piping, control valves, and end
valves. Deluxe piping also has unions
and a strainer.
• Control options range from a simple fan
speed switch to a DDC controller that
can tie into a Tracer Summit
automation system.
• The extended end pocket option adds 8inches (20 cm) to the piping end of
cabinet style units.
• Slope-top vertical cabinet units are an
excellent application for school and
dormitories to prevent items from
being placed on top of the units.
• Vertical wall hung units are used in
vestibules, bathrooms, stairwells, or
other applications when the unit cannot
be installed on the floor
• Inverted unit models allow heating to
circulate from the bottom of the unit.
Quality
• Coils and piping packages are air and
leak-tested before mounting on the
unit.
• Coil piping connections are also air and
leak-tested after mounting on the unit.
• All control end devices and moving
components (fans and motors) are
computer-tested after units are
complete.
Serviceability
• Filters are easily removable and
changed without removing the front
panel on vertical cabinet units.
• Motors are easy to disconnect from the
fan board, allowing easy service.
• The manual output test function is an
invaluable troubleshooting tool. By
simply pressing the test button on the
®
ZN.510, ZN.520, or ZN.010;
Tracer
service personnel can manually
exercise outputs in a pre-defined
sequence.
®
building
CAB-PRC001-EN4
Selection
Model Number
Procedure
Description
Force–Flo Cabinet Heater Model Number Description
Following is a complete description of the cabinet heater model number. Each digit in the model number has a corresponding
code that identifies specific unit options.
FF B B 020 1 C M0 A 0 G 1 0 A A 2 M 000 0 0 1 0 0 0 A A 000 000 0 0 0 0 0 0 0
1 5 10 15 20 25 30 35 40 44
Digits 1, 2 — Unit Type
FF = Force–Flo
Digit 3 — Cabinet Type
A = Vertical Concealed
B = Vertical Cabinet
C = Horizontal Concealed
D = Horizontal Cabinet
E = Horizontal Recessed
H = Vertical Recessed
J = Vertical Cabinet Slope Top
M = Inverted Vertical Cabinet
N = Inverted Vertical Recessed
Digit 4 — Development Sequence “B”
Digits 5, 6, 7 — Unit Size
020 040 080
030 060 100
120
Digit 8 — Unit Voltage
1 = 115/60/1 6 = 230/60/3
2 = 208/60/1 7 = 480/60/3
3 = 277/60/1 8 = 110-120/50/1
4 = 230/60/1 9 = 220-240/50/1
5 = 208/60/3 A = 220-240/50/3
B = 380-415/50/3
Digit 9 — Piping System/Placement
A = No piping, RH
B = No piping, LH
E = No piping, RH,Extended End Pocket
F = No piping, LH, Extended End Pocket
J = With piping package, RH
K = With piping package, LH
L = With piping package, RH, Extended
End Pocket
M= With piping package, LH, Extended
End Pocket
Digits 10, 11 — Design Sequence “M0”
Digit 12 — Inlets
A = Front Toe Space
B = Front Bar Grille
C = Front Stamped Louver
D = Bottom Stamped Louver
E = Bottom Toe Space
F = Back Duct Collar
G = Back Open Return
H = Back Stamped Louver
J = Top Duct Collar
Digit 13 — Fresh Air Damper
0 = None
A = Manual, Bottom Opening
B = Manual, Back Opening
C = Manual, Top Opening
K = No Damper, Bottom Opening
L = No Damper, Back Opening
M= No Damper, Top Opening
Digit 14 — Outlets
A = Front Duct Collar
B = Front Bar Grille
C = Front Stamped Louver
D = Front Quad Grille
E = Bottom Duct Collar
F = Bottom Stamped Louver
G = Top Quad Grille
H = Top Bar Grille
J = Top Duct Collar
Digit 15 — Color
0 = No Paint (Concealed Units Only)
1 = Deluxe Beige 4 = Driftwood Grey
2 = Soft Dove 5 = Stone Grey
3 = Cameo White 6 = Rose Mauve
Digit 16 —
0 = None
B = Keylock Access Door
C = Keylock Panel and Access Door
D = Leveling Feet
F=
G = Keylock Panel and Access Door with
Digit 17 — Motor
A = Free Discharge
B = High Static
Digit 18 — Coil
A = 2 Row Hot Water
B = 3 Row Hot Water
C = 4 Row Hot Water
N = Electric Heat, Single Stage
U = Electric Heat, Two Stage
V = Electric Heat, Low kw, One Stage
W = Steam Distributing
Digit 19 — Coil Series
1 = 108 fpf (steam only)
2 = 144 fpf (hot water only)
Tamperproof Locks/Leveling
Feet
Keylock Access Door with Leveling
Feet
Leveling Feet
Digit 20 — Coil Air Vent
A = Automatic Air Vent
M= Manual Air Vent
Digits 21, 22, 23 — Electric Heat kW
(208V Derate)
000 = No Electric Heat
010 = 1.0 kW (0.75 kW)
020 = 2.0 kW (1.5 kW)
030 = 3.0 kW (2.3 kW)
045 = 4.5 kW (3.3 kW)
060 = 6.0 kW (4.5 kW)
075 = 7.5 kW (5.7 kW)
090 = 9.0 kW (6.6 kW)
100 = 10.0 kW
105 = 10.5 kW (7.9 kW)
110 = 11.0 kW (9.0 kW)
120 = 12.0 kW
135 = 13.5 kW (10.2 kW)
150 = 15.0 kW
180 = 18.0 kW (13.5 kW)
200 = 20.0 kW (15.0 kW)
Digit 24 —Not Used
Digit 25 — Disconnect Switch
0 = None
D = Disconnect Switch
Digit 26 — Filter
0 = None
1 = 1” Throwaway Filter
2 = 1” Throwaway Pleated Media Filter
3 = 1” Throwaway + (1) Extra
4=
1” Throwaway Pleated Media + (1)
5 = 1” Throwaway + (2) Extras
6 = 1” Throwaway Pleated Media +
7 = 1” Throwaway + (3) Extras
8 = 1” Throwaway Pleated Media +
Extra
(2) Extras
(3) Extras
CAB-PRC001-EN 5
Selection
Model Number
Procedure
Digit 27 — Main Control Valve
0 = None
A = 2-Way, 2-Position, NO (25 psig)
B = 3-Way, 2-Position, NO (30 psig)
C = 2-Way, 2-Position, NC (25 psig)
D = 3-Way, 2-Position, NC (15 psig)
E = 2-Way, 2-Position, NO (50 psig)
F = 3-Way, 2-Position, NO (50 psig)
G = 2-Way, 2-Position, NC (50 psig)
H = 3-Way, 2-Position, NC (50 psig)
J = 2-Way, Modulating, 0.7 Cv (50 psig)*
K = 3-Way, Modulating, 0.7 Cv (50 psig)*
L = 2-Way, Modulating, 1.5 Cv (50 psig)*
M= 3-Way, Modulating, 1.5 Cv (50 psig)*
N = 2-Way, Modulating, 2.5 Cv (50 psig)*
P = 3-Way, Modulating, 2.5 Cv (50 psig)*
Q = 2-Way, Modulating, 4.0 Cv (50 psig)*
R = 3-Way, Modulating, 4.0 Cv (50 psig)*
X = Field-supplied, NO
Y = Field-supplied, NC
Z = Field-Supplied 3-Wire Modulating
Digit 28 — Not Used
0 = None
Digit 29 — Piping Packages
0 = None
A = Basic Ball Valve Supply and Return
B = Basic Ball Valve Supply/Manual
Circuit Setter
C = Basic Ball Valve Supply and Return
with Auto Circuit Setter
D = Deluxe Ball Valve Supply and Return
E = Deluxe Ball Valve Supply/Manual
Circuit Setter
F = Deluxe Ball Valve Supply and Return
with Auto Circuit Setter
Digit 30 — Control Type
A = Fan Speed Switch
E = Tracer ZN.010
F = Tracer ZN.510
G = Tracer ZN.520
Description
Digit 32 —Not Used
0 = None
Digits 33, 34 —Future Control Functions
0 = None
Digit 35 — Control Function #3
0 = None
Digit 36 — Control Function #4
0 = None
Digit 37 — Control Function #5
0 = None
2 = Fan Status Sensor
Digit 38 — Control Function 6
0 = None
2 = Filter Status Sensor
Digit 39 —
Falsebacks
0 = None
A=5/8” Standard Recessed Panel
B = 2” Projection Panel
C = 2.5” Projection Panel
D= 3” Projection Panel L = 2”Falseback
E = 3.5” Projection Panel M= 3” Falseback
F = 4” Projection Panel N = 4” Falseback
G = 4.5” Projection
Panel P = 5” Falseback
H= 5” Projection Panel Q =6” Falseback
J = 5.5” Projection Panel R = 7” Falseback
K = 6” Projection Panel T = 8” Falseback
Digit 40 — Main Autoflow GPM
A = 0.5 G = 3.0 N = 7.0
B = 0.75 H = 3.5 P = 8.0
C = 1.0 J = 4.0 Q = 9.0
D = 1.5 K = 4.5 R = 10.0
E = 2.0 L = 5.0 T = 11.0
F = 2.5 M = 6.0 U = 12.0
Projection Panels and
(Vertical Recessed Units Only)
Digit 31 — Control Option
D = Unit Mounted Fan Speed Switch
K = Wall Mounted Fan Speed Switch
V = Unit Mounted Fan Speed Switch w/
Setpoint Dial
W = Wall Mounted Fan Speed Switch w/
Setpoint Dial
X = Unit Mounted Fan Speed Switch w/
Wall Mounted Setpoint Dial
Y = Unit Mounted Fan Speed Switch &
Wall Mounted Setpoint Dial W/ Comm.
Z = Unit Mounted Fan Speed Switch,
On/Cancel, Setpoint Dial W/ Comm.
1 = Wall Mounted On/Cancel W/ Comm.
2 = Wall Mounted Fan Speed Switch,
Setpoint Dial, On/Cancel W/ Comm.
Note: Please contact your local Trane sales representative for buildable digit combinations.
Digit 41 — Not Used
Digit 42 — Subbases
0 = None
A = 2” Subbase D = 5” Subbase
B = 3” Subbase E = 6” Subbase
C = 4” Subbase F = 7” Subbase
Digit 43 — Recessed Flange
0 = None
A = Recessed Flange
Digit 44 — Wall Boxes
0 = None
A = Anodized Wall Box
CAB-PRC001-EN6
Unit
Model A
Vertical Concealed
Model B
Vertical Cabinet
General Data
Inlet
Front Toe Space
Configurations
Outlet
Top Duct Collar
Fresh Air
Bottom or Back
Outlet
Top Quad Grille, Top Bar Grille
Inlet
Front Toe Space,
Front Bar Grille
Outlet
Front Stamped Louver
Inlet
Front Toe Space,
Front Bar Grille
CAB-PRC001-EN 7
Fresh Air
Bottom or Back
Fresh Air
Bottom or Back
Unit
Model C
Horizontal Concealed
General Data
Outlet
Front Duct Collar
Configurations
Inlet
Back Duct Collar
Fresh Air
N/A
Outlet
Front Duct Collar
Outlet
Front Duct Collar
Fresh Air
Top or Back
Inlet
Bottom Toe Space
Inlet
Open Return
No Filter
Fresh Air
N/A
8
CAB-PRC001-EN
Unit
General Data
Configurations
Model D
Horizontal Cabinet
Fresh Air
Top or Back
Fresh Air
N/A
Inlet
Outlet
Front Quad
Grille, Front Bar Grille
Outlet
Front Duct Collar
Fresh Air
N/A
Outlet
Front Quad
Grille, Front Bar Grille
Outlet
Bottom
Stamped Louver
CAB-PRC001-EN 9
Inlet
Bottom Stamped
Louver
Fresh Air
Top or Back
Inlet
Bottom Stamped
Louver
Inlet
Back Stamped
Louver
Fresh Air
Top or Back
Inlet
Bottom Stamped
Louver
Outlet
Front Duct Collar
Fresh Air
N/A
Outlet
Front Quad Grille,
Front Bar Grille
Fresh Air
N/A
Outlet
Front Duct Collar
Fresh Air
N/A
Outlet
Bottom
Stamped Louver
Back Stamped
Louver
Inlet
Back Duct
Collar
Inlet
Back Duct
Collar
Inlet
Back Duct
Collar or
Stamped
Louver
Unit
Model E
Horizontal Recessed
General Data
Outlet
Inlet
Back Duct
Collar
Front Duct Collar
Configurations
Outlet
Front Duct Collar
Fresh Air
Top or Back
Inlet
Bottom Stamped
Louver
Fresh Air
N/A
Inlet
Back Duct
Collar
Fresh Air
Top or Back
Outlet
Bottom Stamped
Louver
Model F
Vertical Wall Hung Cabinet
Outlet
Top Quad Grille or
Bar Grille
Inlet
Bottom & Front
Stamped Louver
Outlet
Bottom Stamped
Louver
Fresh Air
Back
Outlet
Front Stamped
Louver
Inlet
Bottom & Front
Stamped Louver
Inlet
Bottom Stamped
Louver
Fresh Air
Back
10
CAB-PRC001-EN
Unit
Model H
Vertical Recessed
General Data
Inlet
Front Stamped Louver
Outlet
Front Stamped
Louver
Configurations
Outlet
Top Duct Collar
Fresh Air
Bottom or Back
Model J
Vertical Cabinet Slope Top
Inlet
Front Stamped Louver
Inlet
Front Toe Space,
Front Bar Grille
Fresh Air
Bottom or Back
Outlet
Top Quad Grille, Top Bar Grille
Fresh Air
Bottom or Back
CAB-PRC001-EN 11
General Data
Model M
Inverted Vertical Cabinet
Inlet
Front Stamped
Louver
Outlet
Front Stamped
Louver
Inlet
Top Duct
Collar
Outlet
Top Duct
Collar
Model N
Inverted Vertical Recessed
12
Inlet
Front Stamped
Louver
Outlet
Front Stamped
Louver
CAB-PRC001-EN
General Data
Table GD-1. Force–Flo Cabinet Heater General Data
Unit Size 0 2 0 3 0 4 0 6 0 8 1 0 1 2
Coil Data
Face Area — Ft
LxDxH — In. (cm)
2-Row 15x1.7x8 15x1.7x8 20x1.7x8 29.5x1.7x8 38x1.7x8 57x1.7x8 57x1.7x8
3-Row 15x2.6x8 15x2.6x8 20x2.6x8 29.5x2.6x8 38x2.6x8 57x2.6x8 57x2.6x8
4-Row 15x3.5x8 15x3.5x8 20x3.5x8 29.5x3.5x8 38x3.5x8 57x3.5x8 57x3.5x8
Volume — Gal. (Liters)
1-Row (Heat) .06 (.23) .06 (.23) .08 (.30) .11 (.42) .14 (.53) .21 (.79) .21 (.79)
2-Row .12 (.45) .12 (.45) .15 (.57) .22 (.83) .28 (1.06) .42 (1.59) .42 (1.59)
3-Row .18 (.68) .18 (.68) .23 (.87) .33 (1.25) .42 (1.59) .62 (2.35) .62 (2.35)
4-Row .24 (.91) .24 (.91) .30 (1.14) .44 (1.67) .56 (2.12) .83 (3.14) .83 (3.14)
Fins/Ft (cm)
2-Row 144 (4.7) 144 (4.7) 144 (4.7) 144 (4.7) 144 (4.7) 144 (4.7) 144 (4.7)
3-Row 144 (4.7) 144 (4.7) 144 (4.7) 144 (4.7) 144 (4.7) 144 (4.7) 144 (4.7)
4-Row 144 (4.7) 144 (4.7) 144 (4.7) 144 (4.7) 144 (4.7) 144 (4.7) 144 (4.7)
Fan/Motor Data
Fan Quantity 1 1 1 2 2 3 3
Size — Dia” x Width” (cm) 6.31x4 6.31x6.5 6.31x7.5 6.31x6.5 6.31x7.5 (1) 6.31x7.5 6.31x7.5
Motor Quantity 1 1 1 1 1 2 2
Filter Data
1” (cm) TA and Pl. Media
Quantity 1 1 1 1 1 1 1
Size — In. (cm) 8
1” Fresh Air Filter (only on cabinet styles D, E, and H with bottom return and fresh air opening)
Quantity 1 1 1 1 1 1 1
Size — In. (cm) 5
(14 x 49) (14 x 49) (14 x 61) (14 x 85) (14 x 107) (14 x 156) (14 x 156)
2
(cm2) 0.8 (743) 0.8 (743) 1.1 (1020) 1.6 (1490) 2.1 (1950) 3.2 (2970) 3.2 (2970)
(38x4x20) (38x4x20) (51x4x20) (75x4x20) (97x4x20) (145x4x20) (145x4x20)
(38x7x20) (38x7x20) (51x7x20) (75x7x20) (97x7x20) (145x7x20) (145x7x20)
(38x9x20) (38x9x20) (51x9x20) (75x9x20) (97x9x20) (145x9x20) (145x9x20)
(16x10) (16x17) (16x19) (16x17) (16x19) (16x19) (16x19)
7
/8 x 191/8 87/8 x 191/8 87/8 x 241/8 87/8 x 335/8 87/8 x 421/8 87/8 x 611/8 87/8 x 611/8
(23x49) (23x49) (23x61) (23x85) (23x107) (23x155) (23x155)
1
/2 x 191/8 51/2 x 191/8 51/2 x 241/8 51/2 x 335/8 51/2 x 421/8 51/2 x 611/8 51/2 x 611/8
(2) 6.31x6.5
(16x6.5)
Table GD-2. Cabinet Heater Air Flow
Unit Size Coil 0.05 0.1 0.2 0.3 0.4
02 3R144 230 330 300 270 240
03 3R144 310 400 360 330 290
04 3R144 370 550 510 470 430
06 3R144 610 890 830 770 710
08 3R144 730 1000 930 870 800
10 3R144 1000 1400 1310 1210 1120
12 3R144 1080 1520 1420 1330 1220
Note: This is data is based on horizontal concealed model only, with duct inlet, duct outlet and no filter, dry coil, all voltages
except 208 V.
CAB-PRC001-EN 13
2R144 240 330 300 280 250
4R144 200 300 270 250 220
2R144 320 410 390 350 320
4R144 280 370 340 300 270
2R144 390 450 410 380 340
4R144 340 510 480 440 400
2R144 610 760 700 650 590
4R144 560 820 760 710 660
2R144 800 1020 960 890 820
4R144 680 940 870 810 750
2R144 980 1260 1180 1090 1010
4R144 930 1300 1220 1130 1040
2R144 1110 1430 1330 1240 1140
4R144 1000 1430 1340 1240 1150
FD Motor High Static Motor
ESP
General Data
Electric Heat
Electric Heat
All Force-Flo™ cabinet heaters, except
inverted models M and N, are available
with electric heating coils as a standard
option.
Coil Construction
Electric heat coils are open wire type with
a nickel chromium element design.
Power Supply
Units have single-point power since the
electric heating elements operate on line
voltage. Electric heat is available as
208/60/1, 230/60/1, 277/60/1, 208/60/3, or
480/60/3. Electric heat coils operate on the
same voltage as the unit, except for units
with 480/60/3 electric heat. In this case, the
unit operates at 277/60/1, thus requiring a
4-wire supply. All fans and motors are
single phase. In addition, all control
options are 24-volt, utilizing a factoryinstalled transformer.
Power Supply Location
All electric heat cabinet heaters have a
terminal block for main power on the
unit’s right-hand side.
Control Type
Single-stage electric heat units are
controlled by any of the Tracer
control options. Two-stage electric heat is
controlled by the Tracer ZN.520 only. Both
®
ZN
control options use PWM (pulse-width
modulation) outputs to calculate the
electric heat output based on the capacity
request and the electric heat cycles per
hour. For example, if the electric heat
cycles per hour is configured for six
cycles (as Trane recommends) the
controller bases the output on or off time
on six 10-minute periods. If the capacity
request is 40%, the controller controls the
electric heat output on for approximately
four minutes each period.
Safety Features
• All Force-Flo units with standard electric
heat are UL listed.
• Units require only a single-point
electrical connection.
• All electric heating coils are interlocked
with the fan motor switch. Therefore,
electric heat operation is only possible
when the fan is running.
• Each unit has a transformer, eliminating
the need for field installation of a stepdown transformer.
• A unit mounted magnetic contactor(s) is
(are) supplied on all unit voltages.
• A high temperature cutout with automatic reset de-energizes the electric
heat in the event of an overheat condition.
14
CAB-PRC001-EN
General Data
Piping Packages
Factory-Installed Piping
Packages
Force–Flo cabinet heaters have standard
piping packages available as a factory
built and installed option. Factory built
assures all piping packages are fully
tested under water for leaks and are built
within strict tolerances. Factory-installed
means that supply and return pipes are
the only field connections required. The
installer doesn’t have to sweat connect
piping packages onto coil connections in
a tight end pocket. Field connections are
brought to a point near the exterior of the
unit for easy access.
Piping Package Components
Force–Flo piping packages consist of a
variety of components for each application. The following section provides a
detailed description of the piping components. Following this section are additional illustrations and specifications.
Piping System/Placement
Factory piping packages are available
with right or left hand connections. A
simple coil connection (a unit without a
piping package) is also available in either
a right or left hand configuration for those
applications requiring field piping.
Interconnecting Piping
Interconnecting piping refers to the
copper piping which is attached to the
coil connections and all other components such as control valves, end valves,
etc. Piping is
extends near the unit exterior to one inlet
and one outlet connection.
Deluxe or Basic Piping Package
The basic piping package includes only
the main components of the piping
package: interconnecting piping, control
valves, and end valves.
The deluxe piping package also includes
a strainer on the entering water pipe and
unions at the coil connections along with
the basic components. The strainer body
is cast brass construction, with a stainless steel mesh strainer that is easily
removed for cleaning. The unions are
forged brass construction and close with
a minimum amount of effort.
1
/2” nominal OD copper and
End Valves
Each piping package includes a ball valve
for the entering water pipe and one of the
following end valves on the leaving water
pipe: ball valve, manual circuit setter, or
an auto circuit setter. These valves serve
as the field connection points on all
Force–Flo piping packages.
• Ball Valves
Ball valves, also known as stop or end
valves, allow the unit to be cut off for
service purposes. These valves have a
two-inch handle that rotates 90 degrees
to a fully open position. The valve body is
cast brass, and the ball is polished brass
with a Teflon seat. Ball valves are available
as end valves on both the entering and
leaving water pipes.
Manual Circuit Setter
In lieu of a ball valve on the leaving water
pipe, a manual circuit setter, also known
as a manual flow control valve, acts as
both a flow setting device and a stop
valve. This valve allows water flow
through the cabinet heater to be set
quickly and accurately.
The manual circuit setter includes
Schrader ports in the valve body. These
ports are used to measure the pressure
drop across the valve. This pressure drop
can be compared to factory supplied
curves that relate the pressure drop to a
specific flow rate. This valve also has a
memory stop so the correct setting can
be found quickly.
Auto Circuit Setter
An auto circuit setter is an automatic flow
control device available on the leaving
water pipe. The auto circuit setter
includes a cartridge within the valve body
that is sized to allow a specific flow rate
through the coil. This valve sets flow
through the coil without any action
required by a system piping balancer. The
auto circuit setter is available on the
leaving water pipe with a ball valve.
The auto circuit setter also includes two
P/T’s plugs in the valve body to allow
measurement of the pressure drop
temperature through the valve.
Control Valves
Piping packages are available with or
without control valves. All control valve
options are factory mounted and wired to
the Force–Flo unit controls.
• Two-Way/Two-Position Valves
These valves will either fully open or
close in response to a 24VAC signal from
the Trane controller. Control valves are
direct-acting valves. The control valve is
factory mounted in the leaving water pipe
downstream of the coil. Some means of
relieving pump head pressure should be
accounted for when two-way valves are
selected. Normally open or normally
closed valves are available.
• Three-Way/Two-Position Valves
These valves will either allow full water
flow through the coil or divert the flow
through a bypass line. The valves
respond to a 24VAC signal from the Trane
controller. Control valves are direct acting
valves. All three-way valve packages
include a balance fitting in the bypass line
to allow flow balancing in the bypass
position. Three-way valves are factory
mounted in the leaving water pipe
downstream of the coil. Normally open
or normally closed valves are available.
• Two-Way Modulating Valves
These valves modulate the water flow
through the coil in response to a signal
from the Trane controller. Modulating
valves are three-wire floating point equal
percentage valves, and are factory
mounted in the leaving water pipe
downstream of the coil.
• Three-Way Modulating Valves
These valves modulate the water flow
through the coil in response to a signal
from the Trane controller. Three-way
valves allow water that is directed
through the coil to mix with water that is
directed through the bypass line. This
mixture exits through the leaving water
pipe. Modulating valves are three-wire
floating point equal percentage valves,
and are factory mounted in the leaving
water pipe downstream of the coil.
CAB-PRC001-EN 15
Piping Package Options
General Data
Piping Packages
Manual
Automatic Circuit Setter (C)
16
CAB-PRC001-EN
General Data
Selecting the Correct
Modulating Valve Size
Modulating valves are available in any of
four port sizes. These four port sizes
relate to a Cv of 0.7, 1.5, 2.5 or 4.0, which
is the coefficient of flow. The coefficient of
flow is defined as the volume of water
flow through a control valve in the fully
open position with a 1 psig (6.895 kPa)
differential across the valve. It is calculated using the following formula:
Cv = Q/Square root ∆P where:
Cv = flow coefficient
Q = flow rate (GPM)
∆P = pressure drop across the valve or
coil (psig).
For good control, the valve Cv should be
approximately equal to the Cv of the
water coil.
Modulating Valve Selection Example
Assume a size 06 cabinet heater is
selected to operate at the following
conditions:
Vertical cabinet cabinet heater
Entering water temperature = 180 F (82 C)
Leaving water temperature = 150 F ( C)
EAT = 70 F (21 C)
The coil is selected as a four-row coil.
Select the best modulating valve size for
this unit.
1
Find the ∆P across the water coil. Refer to
the ARI performance table to determine
the ∆P across the water coil or use the
Trane Official Product Selection System,
TOPSS™, selection program. The water
pressure drop is found to be 5.7’ (17.0
kPa) of water at a flow rate of 3.59 gpm.
This converts to a pressure drop of 2.47
psig (1.0 feet of water = 0.4328 psig.)
2
Calculate the Cv of the water coil.
Cv = GPM/Square root ∆P.
Cv = 3.59/Square root 2.47
Cv = 2.29
Therefore, select the valve with the Cv of
2.5 since it is closest to the Cv of the
water coil. The following tables illustrate
possible valve selections at ARI conditions for horizontal concealed units with a
high static motor and vertical cabinet
units with a free discharge motor. For
other applications, use TOPSS to
determine the flowrate and make
calculations using the formulas above.
Table GD-3. Modulating Valve Selections for Horizontal Concealed Units, High Static Motor,
∆∆
70 F (21 C) EAT, 180 F (82 C) EWT, 30 F (-1 C)
Unit Coil Coil Valve
Size Coil GPM (L/s) WPD (kPa) Cv Cv
2-Row 1.19 (0.08) 6.0 (17.8) 0.74 0.7
02 3-Row 1.52 (.10) 13.8 (41.2) 0.62 0.7
4-Row 1.59 (.10) 3.8 (11.5) 1.24 1.5
2-Row 1.53 (.10) 10.3 (30.8) 0.72 0.7
03 3-Row 1.82 (.11) 4.3 (12.8) 1.33 1.5
4-Row 1.98 (.12) 6.2 (18.6) 1.21 1.5
2-Row 1.73 (.11) 3.3 (9.8) 1.45 1.5
04 3-Row 2.57 (.16) 9.1 (27.0) 1.29 1.5
4-Row 2.81 (.18) 13.4 (39.9) 1.17 1.5
2-Row 2.87 (.18) 9.9 (29.5) 1.39 1.5
06 3-Row 3.96 (.25) 5.9 (17.7) 2.48 2.5
4-Row 4.37 (.28) 8.2 (24.6) 2.32 2.5
2-Row 3.71 (.23) 4.7 (14.2) 2.60 2.5
08 3-Row 4.74 (.30) 9.1 (27.1) 2.39 2.5
4-Row 5.22 (.33) 12.7 (37.8) 2.23 2.5
2-Row 4.71 (.30) 8.1 (24.1) 2.52 2.5
10 3-Row 6.50 (.41) 18.1 (54.0) 2.32 2.5
4-Row 7.13 (.45) 25.3 (75.6) 2.15 2.5
2-Row 5.48 (.35) 11.4 (34.0) 2.47 2.5
12 3-Row 7.19 (.45) 14.5 (43.2) 2.87 2.5
4-Row 7.83 (.51) 10.5 (31.4) 3.67 4.0
Table GD-4. Modulating Valve Selections for Vertical Cabinet Units, Free Discharge Motor, 70
F (21 C) EAT, 180 F (82 C) EWT, 30 F (-1 C)
Unit Coil Coil Valve
Size Coil GPM (L/s) WPD (kPa) Cv Cv
2-Row 1.06 (.07) 4.8 (14.4) 0.74 0.7
02 3-Row 1.31 (.08) 10.5 (31.4) 0.61 0.7
4-Row 1.34 (.08) 2.8 (8.4) 1.22 1.5
2-Row 1.40 (.09) 8.8 (26.3) 0.72 0.7
03 3-Row 1.70 (.11) 3.8 (11.3) 1.33 1.5
4-Row 1.81 (.11) 5.3 (15.7) 1.20 1.5
2-Row 1.71 (.11) 3.2 (9.5) 1.45 1.5
04 3-Row 2.12 (.13) 6.4 (19.0) 1.27 1.5
4-Row 2.28 (.14) 9.1 (27.3) 1.15 1.5
2-Row 2.70 (.17) 8.9 (26.5) 1.38 1.5
06 3-Row 3.31 (.21) 4.2 (12.6) 2.46 2.5
4-Row 3.59 (.23) 5.7 (17.0) 2.29 2.5
2-Row 3.39 (.21) 4.0 (11.9) 2.58 2.5
08 3-Row 4.11 (.26) 6.9 (20.7) 2.38 2.5
4-Row 4.45 (.28) 9.4 (28.1) 2.21 2.5
2-Row 4.32 (.27) 6.8 (20.4) 2.52 2.5
10 3-Row 5.55 (.35) 13.4 (40.2) 2.30 2.5
4-Row 6.00 (.38) 18.3 (54.8) 2.13 2.5
2-Row 4.99 (.32) 9.6 (28.6) 2.45 2.5
12 3-Row 6.10 (.38) 10.5 (31.4) 2.86 2.5
4-Row 6.48 (.42) 7.3 (21.8) 3.65 4.0
T
∆
∆∆
∆∆
∆
T
∆∆
CAB-PRC001-EN 17
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