Trane VCCF04 - 24, VCEF04 - 24, VCWF04 - 24 Installation and Maintenance Manual
Installation, Operation,
and Maintenance
VariTrane™
Single-Duct and Fan-Powered Units
All VariTrane VAV models with pneumatic, electronic, DDC controls, and diffusers.
VCCF04 - 24
VCEF04 - 24
VCWF04 - 24
SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing
of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and
training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or
serious injury. When working on the equipment, observe all precautions in the literature and on the tags,
stickers, and labels that are attached to the equipment.
September 2014
VAV-SVX08E-EN
Introduction
Read this manual thoroughly before operating or servici ng
this unit.
Warnings, Cautions, and Notices
Safety advisories appear throughout this manual as
required. Your personal safety and the proper operation of
this machine depend upon the strict observance of these
precautions.
The three types of advisories are defined as follows:
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury. All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes.
WARNING
CAUTIONs
NOTICE
Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
Indicates a potentially hazardous
situation which, if not avoided, could
result in minor or moderate injury. It
could also be used to alert against
unsafe practices.
Indicates a situation that could result in
equipment or property-damage only
accidents.
Important Environmental Concerns
Scientific research has shown that certain man-made
chemicals can affect the earth’s naturally occurring
stratospheric ozone layer when released to the
atmosphere. In particular, several of the identified
chemicals that may affect the ozone layer are refrigerants
that contain Chlorine, Fluorine and Carbon (CFCs) and
those containing Hydrogen, Chlorine, Fluorine and
Carbon (HCFCs). Not all refrigerants containing these
compounds have the same potential impact to the
environment. Trane advocates the responsible handling of
all refrigerants-including industry replacements for CFCs
such as HCFCs and HFCs.
Important Responsible Refrigerant Practices
Trane believes that responsible refrigerant practices are
important to the environment, our customers, and the air
conditioning industry. All technicians who handle
refrigerants must be certified. The Federal Clean Air Act
(Section 608) sets forth the requirements for handling,
reclaiming, recovering and recycling of certain
refrigerants and the equipment that is used in these
service procedures. In addition, some states or
municipalities may have additional requirements that
must also be adhered to for responsible management of
refrigerants. Know the applicable laws and follow them.
WARNING
Personal Protective Equipment (PPE)
Required!
Installing/servicing this unit could result in exposure to
electrical, mechanical and chemical hazards.
• Before installing/servicing this unit, technicians
MUST put on all PPE required for the work being
undertaken (Examples; cut resistant gloves/sleeves,
butyl gloves, safety glasses, hard hat/bump cap, fall
protection, electrical PPE and arc flash clothing).
ALWAYS refer to appropriate Material Safety Data
Sheets (MSDS)/Safety Data Sheets (SDS) and OSHA
guidelines for proper PPE.
• When working with or around hazardous chemicals,
ALWAYS refer to the appropriate MSDS/SDS and
OSHA/GHS (Global Harmonized System of
Classification and Labelling of Chemicals) guidelines
for information on allowable personal exposure
levels, proper respiratory protection and handling
instructions.
• If there is a risk of energized electrical contact, arc, or
flash, technicians MUST put on all PPE in accordance
with OSHA, NFPA 70E, or other country-specific
requirements for arc flash protection, PRIOR to
servicing the unit. NEVER PERFORM ANY
SWITCHING, DISCONNECTING, OR VOLTAGE
TESTING WITHOUT PROPER ELECTRICAL PPE AND
ARC FLASH CLOTHING. ENSURE ELECTRICAL
METERS AND EQUIPMENT ARE PROPERLY RATED
FOR INTENDED VOLTAGE.
Failure to follow instructions could result in death or
serious injury.
© 2014 Trane All rights reserved VAV-SVX08E-EN
WARNING
Fiberglass Wool!
Product contains fiberglass wool. Disturbing the
insulation in this product during installation,
maintenance or repair will expose you to airborne
particles of glass wool fibers and ceramic fibers known
to the state of California to cause cancer through
inhalation. Glass wool fibers could result in respiratory,
skin or eye irritation.
Introduction
This manual describes the installation of VariTrane™ VAV
units with recommended wiring, piping, and mounting of
single-duct, dual-duct, fan-powered, low-height terminal
units, and diffusers.
See also the following reference documents:
• BAS-SVX40A-EN —Wireless Comm IOM
• BAS-SVX55A-EN — Wireless Comm Network Design
Best Practices Guide
Receiving and Handling
VariTrane units are shipped completely assembled with
the exceptions of optional attenuators for fan-powered
units and accessories.
Upon receiving the equipment, complete the following:
• Locate the nameplate and refer to the model and sales
order number and check that the correct units have
been delivered.
• Inspect the control enclosures and air valve casing for
dents or punctures.
• Verify that all options have been included, such as
filters, controls, heating coils, water valves, etc. Also
check that the unit voltages agree with the building
parameters.
• Manually rotate fan (if applicable) to assure that there
are no obstructions within the housing.
• Claims for in-transit damage must be filed
immediately with the delivery carrier.
• For hot water re-heat units, check the coil fins and make
sure that coils are not damaged.
• Locate and verify that the correct zone sensors are with
the order. These will be marked with an orange
“Accessories Enclosed” label. Store in a secure
location until needed. Accessories lost at the job site
are NOT covered by Trane’s warranty.
• If a discrepancy occurs between what was ordered and
what is received, contact you local Trane
representative immediately.
• Read appropriate section in this manual for installation
procedures prior to starting equipment.
Introduction
Upon receiving the equipment, please inspect each unit
and components for external or internal damage. Refer to
the bill of lading to insure all equipment and accessories
have been received. Contact your local Trane sales
representative and notify the trucking company
immediately of any short ship or damaged equipment.
Copyright
This document and the information in it are the property of
Trane, and may not be used or reproduced in whole or in
part without written permission. Trane reserves the right
to revise this publication at any time, and to make changes
to its content without obligation to notify any person of
such revision or change.
Trademarks
Trane, VariTrane and the Trane logo are trademarks or
registered trademarks of Trane in the United States and
other countries. Trane is a business of Ingersoll Rand. All
trademarks referenced in this document are the
trademarks of their respective owners.
LonTalk is a registered trademarks of Echelon Corporation.
Revision History
VAV-SVX08E-EN (16 Sep 2014)
Updated for universal mount project.
VAV-SVX08D-EN (11 Jul 2013)
Updated model number for Sinro valve.
VAV-SVX08D-EN (27 Jun 2013)
Added Bottom Access with Cam Lock configuration and
stand alone control information for UCM 4.2, VV550
LonTalk, UC400, UC210 and WCI.
VAV-SVX08E-EN 3
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings, Cautions, and Notices . . . . . . . . 2
Important Environmental Concerns . . . . . 2
Important Responsible Refrigerant
Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Receiving and Handling . . . . . . . . . . . . . . . 3
Model Number Descriptions . . . . . . . . . . . . . . 5
Single-Duct Units . . . . . . . . . . . . . . . . . . . . . . 5
Dual-Duct Units . . . . . . . . . . . . . . . . . . . . . . . 8
Fan-Powered Units . . . . . . . . . . . . . . . . . . . . 9
Unit Information . . . . . . . . . . . . . . . . . . . . . . . . 11
Single-Duct Units . . . . . . . . . . . . . . . . . . . 11
Dual-Duct Units . . . . . . . . . . . . . . . . . . . . 11
Fan-Powered and Fan-Powered
Low-Height Units . . . . . . . . . . . . . . . . . . . 12
Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . 13
Unit Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
(SCR) Motor Speed Control Adjustment
Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . 28
Electrically Commutated Motor (ECM) . . 28
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . 42
Heaters with Contactors . . . . . . . . . . . . . . . 42
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Installation of Diffusers . . . . . . . . . . . . . . . . . . 53
General . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
T-Bar Ceiling . . . . . . . . . . . . . . . . . . . . . . . 53
Concealed Spline Ceiling . . . . . . . . . . . . . 53
Drywall/Plaster Ceiling . . . . . . . . . . . . . . . 54
4 VAV-SVX08E-EN
Model Number Descriptions
Single-Duct Units
Digit 1, 2 — Unit Type
VC = VariTrane Single Duct
Digit 3—Reheat
C = Cooling Only
E = Electric Heat
W = Hot Water Heat
Digit 4—Development Sequence
F= Sixth
Digit 5, 6—Primary Air Valve
04 = 4" inlet (225 cfm)
05 = 5" inlet (350 cfm)
06 = 6" inlet (500 cfm)
08 = 8" inlet (900 cfm)
10 = 10" in le t (140 0 cfm )
12 = 12" inlet (20 00 cfm)
14 = 14" inlet (300 0 cfm)
16 = 16" inlet (40 00 cfm)
24 = 24" x 16" inlet (8000 cfm)
Digit 7, 8, 9—Not Used
000= N/A
Digit 10, 11—Design Sequence
** = Factory Assigned
Digit 12, 13, 14, 15—Controls
DD00 Trane Actuator Only and
Enclosure
DD01= UCM4 Cooling Only Control
DD02= UCM4 N.C. On/Off Hot Water
DD03= UCM4 Prop. Hot Water
DD04= UCM4 Staged On/Off E-Heat
DD05= UCM4 Pulse Width MOD E-Heat
DD07= UCM4 N.O. On/Off Hot Water
DD11= VV550 DDC Controller - Cooling
Only
DD12= VV550 DDC Ctrl to operate N.C.
On/Off water valve
DD13= VV550 DDC Ctrl to operate Prop
water valve
DD14= VV550 DDC Ctrl - On/Off Electric
Heat
DD15= VV550 DDC Ctrl w/Pulse Width
Modulation
DD16= VV550 DDC Controller -
Ventilation Flow
DD17= VV550 DDC Ctrl to operate N.O.
On/Off Water Valve
DD19= VV550 DDC Controller with Flow
Trac ki ng
DD20= VV550 DDC Vent Flow cntrl to
operate N.C. water valve
DD21= VV550 DDC - Vent Flow w/ On/Off
Elec Heat
DD22= VV550 DDC Vent Flow cntrl to
operate prop water valve
DD23= VV550 DDC- Basic plus- Local
(Electric heat- PWM) Remote
(Staged EH)
DD24= VV550 DDC-Basic plus- Local
(Water heat- Modulating)
Remote (Water- N.C. 2 position)
DD25= VV550 DDC-Basic plus- Local
(Water heat- Modulating)
Remote (Water- N.O. 2 position)
DD26= VV550 DDC-Basic plus- Local
VAV-SVX08E-EN 5
DD27= VV550 DDC-Basic plus- Local
DD28= VV550 DDC-Basic plus- Local
DD29= VV550 DDC-Basic plus- Local
DD30= VV550 DDC-Basic plus- Local
DD31= VV550 DDC-Basic plus- Local
DD32= VV550 DDC-Basic plus- Local
DD33= VV550 DDC Vent Flow cntrl to
DD41= UC400 DDC-Basic (No water or
DD42= UC400 DDC-Basic (Water heat-
DD43= UC400 DDC-Basic (Water heat-
DD44= UC400 DDC-Basic (Electric heat-
DD45= UC400 DDC-Basic (Electric heat-
DD46= UC400 DDC Ventilation flow-
DD47= UC400 DDC-Basic (Water heat-
DD49= UC400 DDC-Flow Tracking
DD50= UC400 DDC-Ventilation Flow
DD51= UC400 DDC-Ventilation Flow
DD52= UC400 DDC-Ventilation Flow
DD53= UC400 DDC-Basic plus- Local
DD54= UC400 DDC-Basic plus- Local
DD55= UC400 DDC-Basic plus- Local
DD56= UC400 DDC-Basic plus- Local
DD57= UC400 DDC-Basic plus- Local
DD58= UC400 DDC-Basic plus- Local
DD59= UC400 DDC-Basic plus- Local
DD60= UC400 DDC-Basic plus- Local
DD61= UC400 DDC-Basic plus- Local
(Water heat- N.O. 2-position)
Remote (Water- Modulating)
(Water heat- N.C. 2-position)
Remote (Water- Modulating)
(Water heat- N.O. 2-position)
Remote (Water- N.O. 2-position)
(Water heat- N.C. 2-position)
Remote (Water- NC 2-position)
(Water heat- N.O. 2-position)
Remote (Water- N.C. 2-position)
(Water heat- N.C. 2-position)
Remote (Water- N.O. 2-position)
(Electric heat- Staged) Remote
(Staged EH)
operate N.O. On/Off water valve
electric heat)
N.C.- 2 position)
Modulating)
staged)
PWM)
cooling only
N.O.- 2 position)
(Cooling only)
(Water heat- N. C.- 2 position)
(Electric heat- staged)
(Water heat- Modulating)
(Electric heat- PWM) Remote
(Staged EH)
(Water heat- Modulating)
Remote (Water- N.C. 2 position)
(Water heat- Modulating)
Remote (Water- N.O. 2 position)
(Water heat- N.O. 2-position)
Remote (Water- Modulating)
(Water heat- N.C. 2-position)
Remote (Water- Modulating)
(Water heat- N.O. 2-position)
Remote (Water- N.O. 2-position)
(Water heat- N.C. 2-position)
Remote (Water- N.C. 2-position)
(Water heat- N.O. 2-position)
Remote (Water- N.C. 2-position)
(Water heat- N.C. 2-position)
DD62= UC400 DDC-Basic plus- Local
DD63= UC400 DDC-Ventilation Flow
DD65= UC400 Basic
DD66= UC400 Basic plus-Local
DD67= UC400 Ventilation Flow
DD71= UC210 DDC-Basic (No water or
DD72= UC210 DDC-Basic (Water heat-
DD73= UC400 DDC-Basic (Water heat-
DD74= UC210 DDC-Basic (Electric heat-
DD75= UC210 DDC-Basic (Electric heat-
DD76= UC210 DDC Ventilation flow-
DD77= UC210 DDC-Basic (Water heat-
DD79= UC210 DDC-Flow Tracking
DD80= UC210 DDC-Ventilation Flow
DD81= UC210 DDC-Ventilation Flow
DD82= UC210 DDC-Ventilation Flow
DD83= UC210 DDC-Basic plus- Local
DD84= UC210 DDC-Basic plus- Local
DD85= UC210 DDC-Basic plus- Local
DD86= UC210 DDC-Basic plus- Local
DD87= UC210 DDC-Basic plus- Local
DD88= UC210 DDC-Basic plus- Local
DD89= UC210 DDC-Basic plus- Local
DD90= UC210 DDC-Basic plus- Local
DD91= UC210 DDC-Basic plus- Local
DD92= UC210 DDC-Basic plus- Local
DD93= UC210 Ventilation Flow
DD95= UC210 Basic
DD96= UC210 Basic plus-Local
Remote (Water- N.O. 2-position)
(Electric heat- Staged) Remote
(Staged EH)
(Water heat- N.O. 2-position)
(Electric HeatModulating SCR)
(Electric heat-Modulating SCR)
Remote (Staged EH)
(Electric heat-Modulating SCR)
electric heat)
N.C.- 2 position)
Modulating)
staged)
PWM)
cooling only
N.O.- 2 position)
(Cooling only)
(Water heat- N. C.- 2 position)
(Electric heat- staged)
(Water heat- Modulating)
(Electric heat- PWM) Remote
(Staged EH)
(Water heat- Modulating)
Remote (Water- N.C. 2 position)
(Water heat- Modulating)
Remote (Water- N.O. 2 position)
(Water heat- N.O. 2-position)
Remote (Water- Modulating)
(Water heat- N.C. 2-position)
Remote (Water- Modulating)
(Water heat- N.O. 2-position)
Remote (Water- N.O. 2-position)
(Water heat- N.C. 2-position)
Remote (Water- N.C. 2-position)
(Water heat- N.O. 2-position)
Remote (Water- N.C. 2-position)
(Water heat- N.C. 2-position)
Remote (Water- N.O. 2-position)
(Electric heat- Staged) Remote
(Staged EH)
(Water heat- N.O. 2-position)
(Electric HeatModulating SCR)
Model Number Descriptions
(Electric heat-Modulating SCR)
DD97= UC210 Ventilation Flow
ENCL= Shaft Only in Enclosure
ENON= Shaft Out Side for Electric Units
FM00= Other Actuator and Control
FM01= Trane Supplied Actuator, Other
PC00= N.C. Actuator and Linkage Only
PC04= N.C. with DA Stat, 3000 Series
PC05= N.C. with RA STAT, 3000 Series
PCSS= Normally Closed Special
PN00= N.O. Actuator and Linkage Only
PN04= N.O. 3000 Series, DA STAT
PN05= N.O. 3000 Series, RA STAT
PN11= Auto Dual Min.
PN32= N.O. PNEU Constant Vol.
PN34= N.O. 3000 Series Constant
PNON= Shaft Out Side for Pneumatic
PNSS= Normally Open Special
N.C .= Normally-closed
N.O. = Normally-opened
DA Stat = Direct-acting pneumatic t-stat
RA Stat = Reverse-acting pneumatic
PN = Pneumatic
FM = Factory installation of customer-
PVR = Pneumatic Volume Regulator
Remote (Staged EH)
(Electric heat-Modulating SCR)
Ctrl
Vol.,RA STAT
Units
(by others)
t-stat (by others)
supplied controller
Digit 16—Insulation
A = 1/2" Matte-faced
B = 1" Matte-faced
D = 1" Foil-faced
F = 1" Double-wall
G = 3/8" Closed-cell
Digit 17 & 18—Not Used
00 = N/A
Digit 19—Outlet Plenum
(Connection is Slip & Drive)
0= None
A= 1 Outlet RH
B= 1 Outlet END
C = 1 Outlet LH
D = 2 Outlets, 1 RH, 1 END
E = 2 Outlets, 1 LH, 1 END
F = 2 Outlets, 1 RH, 1 LH
H = 3 Outlets, 1 LH, 1 RH, 1 END
J = 4 Outlets, 1 LH, 1 RH, 2 END
Note: See unit drawings for outlet sizes/
damper information.
Digit 20—Not Used
0= N/A
Digit 21—Water Coil
0= None
1= 1-Row
2= 2-Row
3= 3-Row
4= 4-Row
A= 1-Row Premium
B = 2-Row Premium
C = 3-Row Premium
D = 4-Row Premium
Digit 22—Electrical Connections
F = Flippable (can be flipped in the
field for LH or RH connections
- VCEF only)
L = Left (Airflow hitting you in the
face)
R = Right (Airflow hitting you in the
face)
0 = Opposite side connection – coil
and control (VCWF only)
Note: VCCF, VCWF can be flipped in field
for opposite-hand connection
Digit 23—Transformer
0= None
1 = 120/24 volt (50 VA)
2 = 208/24 volt (50 VA)
3 = 240/24 volt (50 VA)
4 = 277/24 volt (50 VA)
5 = 480/24 volt (50 VA)
6 = 347/24 Volt (50 VA)
7 = 380/24 Volt (50 VA)
8 = 575/24 Volt (50 VA)
Note: For VCEF units with transformers
the VA depends on the staging,
control, and contactor type
(ranges are 50 VA to 75 VA, for 1
and 3 phase)
Digit 24—Disconnect Switch
0= None
W= With
Note: VCCF, VCWF – Toggle Disconnect;
VCEF – Door Interlocking Power
Disconnect
Digit 25—Power Fuse
0= None
W= With
Digit 26—Electric Heat Voltage
0= None
A = 208/60/1
B = 208/60/3
C = 240/60/1
D = 277/60/1
E = 480/60/1
F = 480/60/3
G = 347/60/1
H = 575/60/3
J = 380/50/3
K = 120/60/1
Digit 27 - 29—Electric Heat kW
000= None
010 = 1.0 kW
015 = 1.5 kW
460 = 46.0 kW
Note: 0.5 to 8.0 kW – ½ kW increments
8.0 to 18.0 kW – 1 kW increments
18.0 to 46.0 kW – 2 kW increments
Digit 30—Electric Heat Stages
0= None
1 = 1 Stage
2 = 2 Stages Equal
3 = 3 Stages Equal
Digit 31—Electrical Heat
Contactors
0= None
1 = 24-volt magnetic
2 = 24-volt mercury
3 = PE with magnetic
4 = PE with mercury
5 = SCR heat UC400/UC210
6 = SCR heat FMTD/ENCL/DD00
A = 24-volt mercury (left hand)
B = 24-volt mercury (right hand)
C = PE with mercury (left hand)
D = PE with mercury (right hand)
Digit 32 & 33—Not Used
00 = N/A
Digit 34—Actuator
0= Standard
A = Spring Return (Normally Open)
B = Spring Return (Normally Closed)
C = Belimo Actuator
Digit 35—Sensor Options
0 = Standard (Wired)
1 = Factory Mounted Wireless
Receiver (Sensor Accessory)
2 = Wireless Comm Interface
Modular FM
Digit 36—Pre-Wired Factory
Solutions
0= None
1 = Factory Mounted DTS
2 = HW Valve Harness
3 = Both DTS & HW Valve Harness
4 = Averaging DTS factory installed
in unit (Required for
UC210/UC400 with SCR heat)
Digit 37—Bottom Access with
Cam Locks
0= None
1 = Access Left Side Terminal Unit
2 = Access Right Side Terminal Unit
3 = Access Left Side Terminal Unit
with Water Connection on Right
4 = Access Right Side Terminal Unit
with Water Coil Connection on
Left
6 VAV-SVX08E-EN
Model Number Descriptions
Digit 38—Piping Package
0= None
A = 2-way Automatic Balancing)
B = 3-way Automatic Balancing
Digit 39—Water Valve
0= None
1 = Proportional, HW Valve, 0.7 Cv
2 = Proportional, HW Valve, 2.7 Cv
3 = Proportional, HW Valve, 6.6 Cv
4 = Proportional, HW Valve, 8.0Cv
Digit 40—Flow Rate
00 = None
A = 0.5 gpm (0.03 l/s)
B = 1.0 gpm (0.06 l/s)
C = 1.5 gpm (0.09 l/s)
D = 2.0 gpm (0.13 l/s)
E = 2.5 gpm (0.16 l/s)
F = 3.0 gpm (0.19 l/s)
G = 3.5 gpm (0.22 l/s)
H = 4.0 gpm (0.25 l/s)
J = 4.5 gpm (0.28 l/s)
K = 5.0 gpm (0.31 l/s)
L = 5.5 gpm (0.35 l/s)
M = 6.0 gpm (0.38 l/s)
N = 6.5 gpm (0.41 l/s)
P = 7.0 gpm (0.44 l/s)
Q = 7.5 gpm (0.47 l/s)
R = 8.0 gpm (0.50 l/s)
S = 9.0 gpm (0.57 l/s)
T = 10.0 gpm (0.63 l/s)
U = 11.0 gpm (0.69 l/s)
V = 12.0 gpm (0.76 l/s)
W = 13.0 gpm (0.82 l/s)
X = 14.0 gpm (0.88 l/s)
Y = 15.0 gpm (0.95 l/s)
Z = 16.0 gpm (1.01 l/s)
1 = 17.0 gpm (1.07 l/s)
2 = 18.0 gpm (1.14 l/s)
3 = 19.0 gpm (1.20 l/s)
4 = 20.0 gpm (1.26 l/s)
5 = 21.0 gpm (1.32 l/s)
6 = 22.0 gpm (1.39 l/s)
7 = 23.0 gpm (1.45 l/s)
VAV-SVX08E-EN 7
Model Number Descriptions
Dual-Duct Units
Digit 1, 2, 3—Unit Type
VDD= VariTrane dual-duct
Digit 4—Development Sequence
F= Sixth
Digit 5, 6—Primary Air Valve
05 = 5" inlet (350 cfm)
06 = 6" inlet (500 cfm)
08 = 6" inlet (900 cfm)
10 = 10" in le t (140 0 cfm )
12 = 12" inlet (20 00 cfm)
14 = 14" inlet (300 0 cfm)
16 = 16" inlet (40 00 cfm)
Digit 7, 8—Secondary Air Valve
05 = 5" inlet (350 cfm)
06 = 6" inlet (500 cfm)
08 = 8" inlet (900 cfm)
10 = 10" in le t (140 0 cfm )
12 = 12" inlet (20 00 cfm)
14 = 14" inlet (300 0 cfm)
16 = 16" inlet (40 00 cfm)
Digit 9—Not Used
0= N/A
Digit 10, 11—Design Sequence
** = Factory Assigned
Digit 12, 13, 14, 15—Controls
DD00= Trane Actuator Only
DD01= UCM4 Cooling Only Control
DD08= UCM4 Dual Duct
Constant Volume
DD11= VV550 DDC Controller -
Cooling Only
DD18= VV550 DDC Controller w
Constant Volume
DD41= UC400 DDC-Basic (No water or
electric heat)
DD48= UC400 DDC-Basic (Constant
Vol ume)
DDSS= Digital Special
ENON= Shaft Out Side for Electric
Units
FM00= Other Actuator and Control
FM01= Trane Supplied Actuator, Other
Ctrl
PC03= NC Heating Valve, N.O. Cooling
Val ve
PCSS= Normally Closed Special
PN08= N.O. Heat/Cool Actuators &
Linkage Only
PN09= N.O. Heating, N.O. Cooling,
w/PVR’s
PN10= N.O. Heating, N.O. Cooling,
w/PVR’s (CV DISCH)
PNON= Shaft Out Side for Pneumatic
Units
PNSS= Normally Open Special
Notes:
N.C. = Normally-closed
N.O. = Normally-opened
DA Stat = Direct-acting pneumatic t-stat
(by others)
RA Stat = Reverse-acting pneumatic tstat (by others)
PN = Pneumatic
FM = Factory installation of customer-
supplied controller
PVR = Pneumatic Volume Regulator
Digit 16—Insulation
A = 1/2" Matte-faced
B = 1" Matte-faced
D = 1" Foil-faced
F = 1" Double-wall
G = 3/8" Closed-cell
Digit 17—Not Used
0= N/A
Digit 18—Not Used
0= N/A
Digit 19—Outlet Plenum
(Connection is slip & drive)
0 = none
A = 1 outlet–RH
B = 1 outlet–END
C = 1 outlet–LH
D = 2 outlets–1 RH, 1 END
E = 2 outlets–1 LH, 1 END
F = 2 outlets–1 RH, 1 LH
G = 2 outlets - END
H = 3 outlets–1 LH, 1 RH, 1 END
J = 4 outlets–1 LH, 1 RH, 2 END
Note: See unit drawings for outlet sizes/
damper information.
Digit 20—Not Used
0= N/A
Digit 21—Not Used
0= N/A
Digit 22—Not Used
0= N/A
Digit 23—Transformer
0= None
1 = 120/24 volt (50 VA)
2 = 208/24 volt (50 VA)
3 = 240/24 volt (50 VA)
4 = 277/24 volt (50VA)
5 = 480/24 volt (50 VA)
6 = 347/24 volt (50 VA)
7 = 575/24 volt (50 VA)
Digit 24—Disconnect Switch
0= None
W = With Toggle
Digit 25—Power Fuse
0= None
W= With
Digit 26—Not Used
0= N/A
Digit 27—Not Used
0= N/A
Digit 28—Not Used
0= N/A
Digit 29—Not Used
0= N/A
Digit 30—Not Used
0= N/A
Digit 31—Not Used
0= N/A
Digit 32—Not Used
0= N/A
Digit 33—Special Options
0= None
X = Varies - Factory Assigned
Digit 34—Actuator
A = Belimo Actuator
Digit 35—Wireless Sensor
0 = Sensor/Receiver Standard
1 = Wireless Sensor/Receiver
Mounted
Note: All sensors selected in
accessories
Digit 36—Duct Temp Sensor
0= None
1 = With Duct Temp Sensor
8 VAV-SVX08E-EN
Model Number Descriptions
Fan-Powered Units
Digit 1, 2—Unit Type
VP = VariTrane Fan-Powered Parallel
VS = VariTrane Fan-Powered Series
LP = VariTrane Fan-Powered
Low-Height Parallel
LS = VariTrane Fan-Powered
Low-Height Series
Digit 3—Reheat
C = Cooling Only
E = Electric Heat
W = Hot Water Heat
Digit 4—Development Sequence
F= Sixth
Digit 5, 6—Primary Air Valve
05 = 5" inlet (350 max cfm)
06 = 6" inlet (500 max cfm)
08 = 8" inlet (900 max cfm)
10 = 10" in le t (140 0 max cf m)
12 = 12" inlet (2000 max cfm)
14 = 14" inlet (3000 max cfm)
16 = 16" inlet (4000 max cfm)
RT = 8" x 14" inlet (1800 max CFM)
Note: 10, 12, 14, 16 Not Available on
Low-Height
Digit 7, 8—Secondary Air Valve
00 = N/A
Digit 9—Fan
P = 02SQ fan (500 nominal cfm)
Q = 03SQ fan (1100 nominal cfm)
R = 04SQ fan (1350 nominal cfm)
S = 05SQ fan (1550 nominal cfm)
T = 06SQ fan (1850 nominal cfm)
U = 07SQ fan (2000 nominal cfm)
V = 08SQ Fan (500 nominal cfm)
W = 09SQ Fan (900 nominal cfm)
X = 10SQ Fan (1800 nominal cfm)
Digit 10, 11—Design Sequence
** = Factory assigned
Digit 12, 13, 14, 15—Controls
DD01= Cooling Only Control
DD02= N.C. On/Off Hot Water
DD03= Prop. Hot Water
DD04= Staged On/Off E-Heat
DD05= Pulse Width Mod of E-Heat
DD07= N.O. On/Off Hot Water
DD11= VV550 DDC Controller - Cooling
Only
DD12= VV550 DDC Ctrl w/N.C. On/Off
HW Valve
DD13= VV550 DDC Ctrl w/Prop. HW
Valve
DD14= VV550 DDC Ctrl - On/Off
Electric Heat
DD15= VV550 DDC Ctrl w/Pulse Width
Modulation
DD17= VV550 DDC Ctrl w/N.O. On/Off
HW Valve
DD23= VV550 DDC- Basic plus- Local
(Electric heat- PWM) Remote
(Staged EH)
DD28= VV550 DDC-Basic plus- Local
(Water heat- N.O. 2-position)
Remote (Water- N.O. 2-position)
DD29= VV550 DDC-Basic plus- Local
(Water heat- N.C. 2-position)
Remote (Water- N.C. 2-position)
DD30= VV550 DDC-Basic plus- Local
(Water heat- N.O. 2-position)
Remote (Water- N.C. 2-position)
DD31= VV550 DDC-Basic plus- Local
(Water heat- N.C. 2-position)
Remote (Water- N.O. 2-position)
DD32= VV550 DDC-Basic plus- Local
(Electric heat- Staged) Remote
(Staged EH)
DD41= UC400 DDC-Basic (No water or
electric heat)
DD42= UC400 DDC-Basic (Water heat-
Normally Closed- 2 position)
DD43= UC400 DDC-Basic (Water heat-
Modulating)
DD44= UC400 DDC-Basic (Electric heat-
staged)
DD45= UC400 DDC-Basic (Electric heat-
PWM)
DD47= UC400 DDC-Basic (Water heat-
Normally Opened- 2 position)
DD53= UC400 DDC-Basic plus- Local
(Electric heat- PWM) Remote
(Staged EH)
DD58= UC400 DDC-Basic plus- Local
(Water heat- N.O. 2-position)
Remote (Water- N.O. 2-position)
DD59= UC400 DDC-Basic plus- Local
(Water heat- N.C. 2-position)
Remote (Water- N.C. 2-position)
DD60= UC400 DDC-Basic plus- Local
(Water heat- N.O. 2-position)
Remote (Water- N.C. 2-position)
DD61= UC400 DDC-Basic plus- Local
(Water heat- N.C. 2-position)
Remote (Water- N.O. 2-position)
DD62= UC400 DDC-Basic plus- Local
(Electric heat- Staged) Remote
(Staged EH)
DD65= Basic (Electric Heat- Modulating
SCR)
DD66= Basic plus – Local (Electric heat –
Modulating SCR) Remote
(Staged EH)
DD71= UC210 DDC-Basic
(Cooling only)
DD72= UC210 DDC-Basic
(Water heat-nc 2pos)
DD73= UC210 DDC-Basic
(Water heat-Modulating)
DD74= UC210 DDC-Basic
(Electric heat-staged)
DD75= UC210 DDC-Basic
(Electric heat-pwm)
DD77= UC210 DDC-Basic
(Water heat-NO 2pos)
DD83= UC210 DDC-Basic+ Local
(Electric heat-pwm)
Remote (Staged)
DD84= UC210 DDC-Basic+ Local
(Water heat Modulating)
Remote (Water-NC 2pos)
DD85= UC210 DDC-Basic+ Local
(Water heat Modulating)
Remote (Water-NO 2pos)
DD86= UC210 DDC-Basic+ Local
(Water heat NO 2pos)
Remote (Water-Modulating)
DD87= UC210 DDC-Basic+ Local
(Water heat NC 2pos)
Remote (Water-Modulating)
DD88= UC210 DDC-Basic+ Local
(Water heat NO 2pos)
Remote (Water-NO 2pos)
DD89= UC210 DDC-Basic+ Local
(Water heat NC 2pos)
Remote (Water-NC 2pos)
DD90= UC210 DDC-Basic+ Local
(Water heat NO 2pos)
Remote (Water-NC 2pos)
DD91= UC210 DDC-Basic+ Local
(Water heat NC 2pos)
Remote (Water-NO 2pos)
DD92= UC210 DDC-Basic+ Local
(Electric heat-staged)
Remote (Staged)
DD95= UC210 DDC-Ctrl w/Modulating
SCR
DD96= UC210 DDC-Space Temp Ctrl w/
Local SCR & Remote Stge Elec
Heat
DD00= Trane Actuator Only
ENCL= Shaft Only in Enclosure
ENON= Shaft Out Side for Electric Units
FM00= Other Actuator and Control
FM01= Trane supplied actuator,
other control
PN00= N.O. Actuator and Linkage Only
PN05= N.O. 3000 Series, RA Stat
PN51= Pneumatic normally open
w/3011,DPS fan
PN52= Pneumatic normally open
w/3011, DPM fan
PNON= Shaft Out Side for Pneumatic
Units
Notes:
N.C. = Normally-closed
N.O. = Normally-opened
DA Stat = Direct-acting pneumatic t-stat
(by others)
RA Stat = Reverse-acting pneumatic
t-stat (by others)
PN = Pneumatic
FM = Factory installation of customer-
supplied controller
PVR = Pneumatic Volume Regulator
Digit 16—Insulation
A = 1/2” Matte-faced
B = 1" Matte-faced
D = 1" Foil-faced
F = 1" Double-wall
G = 3/8” Closed-cell
Digit 17—Motor Type
D = PSC Motor
E = High-efficiency motor (ECM)
Digit 18—Motor Voltage
1 = 115/60/1
2 = 277/60/1
3 = 347/60/1
4 = 208/60/1
5 = 230/50/1
VAV-SVX08E-EN 9
Model Number Descriptions
Digit 19—Outlet Connection
1 = Flanged
2 = Slip & Drive
Digit 20—Attenuator
0 = No Attenuator
W = With Attenuator
Digit 21—Water Coil
0= None
1 = 1-Row–Plenum inlet installed RH
2 = 2-Row–Plenum inlet installed RH
3 = 1-Row–Discharge installed, LH
4 = 1-Row–Discharge installed, RH
5 = 2-Row–Discharge installed, LH
6 = 2-Row–Discharge installed, RH1
A = 1-Row–Premium water coil inlet
B = 2-Row–Premium water coil inlet
C = 1-Row–Premium hot coil
on discharge, LH
D = 1-Row–Premium hot coil
on discharge, RH
E = 2-Row–Premium hot coil
on discharge, LH
F = 2-Row–Premium hot coil
on discharge, RH
Note: 1- and 2-row not available with
Low-Height
Digit 22—Electrical Connections
L = Left (Airflow hitting you in the
face)
R = Right (Airflow hitting you in the
face)
W = Narrow Corridor LH, Hi-Volt Inlet
Facing
X = Narrow Corridor RH, Hi-Volt Inlet
Facing
Note: (W & X) Fan Powered Series Only
Digit 23—Transformer
0 = N/A (provided as standard)
Digit 24—Disconnect Switch
0= None
W= With
Electric Reheat w/ door interlocking
power disconnect, Cooling Only and
Water Reheat w/ toggle disconnect
Digit 25—Power Fuse
0= None
W= With
Digit 26—Electric Heat Voltage
0= None
A = 208/60/1
B = 208/60/3
C = 240/60/1
D = 277/60/1
E = 480/60/1
F = 480/60/3
G = 347/60/1
H = 575/60/3
J = 380/50/3
K = 120/60/1
Note: K not available with Low Height
Digit 27, 28, 29—Electric Heat
kW
000= None
050 = 0.5 kW
010 = 1.0 kW
015 = 1.5 kW
260 = 26.0 kW
Note: Electric Heat Voltage -
0.5 to 8.0 kW–½ kW increments
8.0 to 18.0 kW –1 kW increments
18.0 to 46.0 kW–2 kW increments
Digit 30—Electric Heat Stages
0= None
1 = 1 Stage
2 = 2 Stages Equal
3 = 3 Stages Equal
Note: 3 not available with Low Height
Digit 31—Contactors
0= None
1 = 24-volt magnetic
2 = 24-volt mercury
3 = PE with magnetic
4 = PE with mercury
5 = SCR heat UC400
6 = SCR heat FMTD/ENCL/DD00
Note: SCR cannot be selected with the
following configuration:
• KW > 10, 208 volt 3 phase, Low
Height
• KW > 22, 480 volt 3 phase, Low
Height
• Voltage = 575 volt
Digit 32—Airflow Switch
0= None
W= With
Digit 33—Not Used
0= N/A
Digit 34—Actuator
0 = Standard
A = Belimo actuator
Digit 35—Wireless Sensors
0= None
1 = Factory Mounted Wireless
Receiver (Sensor Assembly)
2 = Wireless Comm Interface
Modular FM
Note: All sensors selected in
accessories
Digit 36—Pre-Wired Factory
Solutions
0= None
1 = Factory Mounted DTS
2 = HW Valve Harness
3 = Both DTS & HW Valve Harness
Digit 37—Bottom Access
0= None
W = Access Left Side of Terminal Unit
Digit 38—Piping Package
0= None
A = 2-way Automatic Balancing)
B = 3-way Automatic Balancing
Digit 39—Water Valve
0= None
1 = Proportional, HW Valve, 0.7 Cv
2 = Proportional, HW Valve, 2.7 Cv
3 = Proportional, HW Valve, 6.6 Cv
4 = Proportional, HW Valve, 8.0Cv
Digit 40—Flow Rate
0= None
A = 0.5 gpm (0.03 l/s)
B = 1.0 gpm (0.06 l/s)
C = 1.5 gpm (0.09 l/s)
D = 2.0 gpm (0.13 l/s)
E = 2.5 gpm (0.16 l/s)
F = 3.0 gpm (0.19 l/s)
G = 3.5 gpm (0.22 l/s)
H = 4.0 gpm (0.25 l/s)
J = 4.5 gpm (0.28 l/s)
K = 5.0 gpm (0.31 l/s)
L = 5.5 gpm (0.35 l/s)
M = 6.0 gpm (0.38 l/s)
N = 6.5 gpm (0.41 l/s)
P = 7.0 gpm (0.44 l/s)
Q = 7.5 gpm (0.47 l/s)
R = 8.0 gpm (0.50 l/s)
S = 9.0 gpm (0.57 l/s)
T = 10.0 gpm (0.63 l/s)
U = 11.0 gpm (0.69 l/s)
V = 12.0 gpm (0.76 l/s)
W = 13.0 gpm (0.82 l/s)
10 VAV-SVX08E-EN
Unit Information
Single-Duct Units
The basic unit consists of a sheet metal casing with an air
valve, which is used to modulate the air being delivered
into the occupied zone. The unit is designed to modulate
either cooling or heating air between the temperatures of
40°F and 140°F. Air enters the air valve through the round
or rectangular inlet and exits into the sheet metal casing to
be distributed to the zone either through integral round
outlets in the casing or through rectangular duct attached
to the discharge of the unit.
The basic unit can also be ordered with factory-mounted
electric or hot water heating coils attached to the
discharge. See Figure 2, p. 11.
These re-heat units are used primarily to reheat air-to-zone
temperature when the load in the occupied space is low.
Primary air is modulated through the VariTrane air valve by
rotating the damper blade. All air valves have a round/
rectangular inlet for easy fit-up with incoming duct work.
Typical Single-Duct Units
Figure 1. Typical single duct unit — VCCF
Figure 2. Typical single duct unit — VCWF
Figure 3. Typical single duct unit — VCEF
Dual-Duct Units
Dual-duct units provide two air valves: one as heating
primary air and the other as cooling primary air. Both
discharge into the common outlet, which leads to the zone
being controlled. See Figure 4, p. 11.
Units are provided with a slip and drive rectangular duct
connection or can be ordered with integral outlet plenum.
Sequencing of hot and cold air valve is dependent on job
requirements. One typical control is valves working in
conjunction to respond to zone temperature.
When the cooling valve becomes fully closed or reaches a
specified minimum, the heating valve will begin to
modulate or vice versa. The typical result is that air flowing
to the zone varies from maximum down to a minimum and
back up to maximum as load varies and controls would
cause one air valve to close and the other to open.
Another typical application is when the unit provides a
constant volume to the zone. When the zone sensor is tied
directly to the heating valve, it will modulate the heating
valve according to the zone temperature.
When the heating valve is fully closed or there is a call for
cooling in the zone, the cooling valve will be at constant
supply. As the space becomes too cool, the heating valve
will modulate open, decreasing the cooling valve flow. The
typical result is that the air flowing into the zone stays at a
constant flow whether the unit is heating or cooling.
Figure 4. Typical dual-duct unit: VDDF
VAV-SVX08E-EN 11
Unit Information
Fan-Powered and Fan-Powered LowHeight Units
VariTrane fan-powered and low-height fan-powered units
can be either parallel or series, with or without re-heat.
(SeeFigure 5, p. 12 thru Figure 8, p. 12.)
Typical Fan-Powered Units
Figure 5. Parallel fan-powered terminal unit (top) &
series fan-powered terminal units (bottom)
Figure 6. Low height series: LSCF (top) & low height
series: LSWF (bottom)
Figure 7. Low height series: LSEF (top) & low height
parallel: LPCF (bottom)
Figure 8. Low height parallel: LPWF (top) & low height
parallel: LPEF (bottom)
The fan on a series unit runs continuously whenever the
main air handler unit is in operation. There are various
options for starting the fan. The fan can be started three
ways: 1) remotely, 2) by a duct pressure switch, or 3) by a
combination of both. The particular fan control method
may vary from unit to unit, depending upon job needs.
Typically, heater is off while air valve modulates primary
air and responds to zone temperature. If zone temperature
decreases to the point where a decrease in primary air will
not maintain the desired temperature, the re-heat will be
activated to increase the temperature of the discharge air.
On a parallel unit, the VariTrane air valve delivers primary
cooling air to the unit outlet. When the space temperature
decreases beyond air valve control, the fan is turned on as
the first stage of heat. The fan delivers plenum air from
above the occupied space to the unit outlet, which is mixed
with primary air and delivered to the occupied space.
Note: Either the fan, the air valve, or both can deliver
airflow into the occupied space. In order to prevent
primary airflow from exiting through the fan when
the fan is not running on a parallel unit, a back draft
damper is provided. When the fan is not running,
the efficiency of this system is the same as a
standard single-duct VAV unit.
Typically, the control systems applied to parallel units
cause the air valve to close to zero or a minimum flow
before the fan is activated. After the fan is activated, the
optional heat will be activated upon further reduction in
zone temperature. Therefore, minimal primary air is mixed
with the heated air.
VariTrane fan-powered unit fan sizes 02SQ–05SQ and
08SQ–10SQ were performance tested at .12 in. w.g. and
sizes 06SQ and 07SQ were tested at .15 in. w.g. Units are
not designed to operate unducted and below these tested
static pressures.
Note: Fan-powered units are available with rectangular
discharge connection only. The optional heater is
mounted on the discharge of the unit. Hot water
coils are connected to either the plenum inlet or on
the discharge on parallel units, and to the discharge
of series units.
12 VAV-SVX08E-EN
Unit Installation
Inlet Size
B C A
1.376" (35 mm)
25.154" (639 mm) 1.376" (35 mm)
37.25" (946 mm)
25.25" (641 mm) 23.154" (588 mm)
12" thru 16"
5" thru 10"
AIR
VALVE
AIR
VALVE
COOLING
HEATING
C
A
B
TOP VIEW
WARNING
Proper Structural Support Required!
Ceiling structure must be strong enough to support the
weight of the unit. If unsure, check with a structural
engineer. Refer toTable 1, p. 24 thruTable 6, p. 26 for unit
weights. Failure to ensure proper structural ceiling
support could result in unit failing from its location
which could result in death or serious injury.
Due to their weight, the VAV terminal units should be
suspended from the uppermost ceiling, independent of
the false ceiling grid. Suspension devices are to be
supplied by the installer. Units must be installed level and
upright. Failure to level the unit properly may prevent
proper operation of the controls and/or terminal unit.
Units are not designed to be installed vertically.
Consequently, this will also void the UL ratings and any
warranty on the unit.
Single-Duct
Figure 9. Single-duct hanging recommendations
.
Figure 10. Dual-duct hanger bracket locations
Fan-Powered (Standard and Low-Height)
Fan-powered units should be supported by either hanger
straps or by using a threaded rod in conjunction with the
hanger brackets that are provided on the unit. Care should
be exercised to insure that the hanging straps do not block
the side access panel. See Figure 11, p. 16 thru Figure 18,
p. 22.
Depending upon the size and weight of the single-duct
unit, it may be capable of being supported by the ductwork
that is connected to it. No hanger brackets are provided on
these units since the unit should be supported by means
of a hanger strap. The hanger strap should be secured
directly to the unit casing as shown in Figure 9, p. 13.
For cooling only single-duct units or single-duct units with
hot water coil, the unit may be rotated 180° for opposite
side connections.
For units with electric heat, the unit can be flipped to either
RH or LH connection orientation if model number digit 22
Electrical Connections = F.
Dual-Duct
Dual-duct units should be supported by either hanger
straps or by using a threaded rod in conjunction with the
hanger brackets that are provided on the unit. See
Figure 10, p. 13.
Duct Connections
All VariTrane units should be provided with a minimum of
1.5-duct diameters of straight duct prior to the inlet of the
unit. It is recommended that at least 48 inches of straight
duct be provided from the discharge of the units prior to
any take-offs or transitions.
Important: This is a requirement for electric heat fan-
powered units used in applications with
100% downward discharge.
Note: In order to maintain good air distribution over the
elements and not create turbulence which could
cause a limit cutout there should be four feet of
ductwork, consistent of the discharge dimensions
of the heater. downstream of the reheat coil prior to
any diffuser takeoffs for VariTrane™ electric coils.
1. After all connections are made, check that the entire
ductwork system is airtight. In some high-pressure
systems, duct sealer may be necessary.
Note: All inlet duct on the VAV boxes are sized
approximately 1/8" smaller in diameter than the
nominal size in order to allow the incoming duct
to slide over the inlet of the VAV box.
2. Provide insulation around the entire inlet collar (all the
way to the unit casing).
VAV-SVX08E-EN 13
Unit Installation
Note: Use caution not to damage the flow tubes when
making ductwork connections or insulating.
3. Cut “slits” in the insulation for the flow tubes and
secure with duct tape.
4. If the unit is to be installed in a location with high
humidity, external insulation around the heating coil
should be installed as required.
Water Coil Connections
Note: The following coils have 3/8” OD water coil piping
connections.
• Single Duct 1-row coils (inlet sizes 05, 05, 06, 08
or 10 only)
• Low Height Parallel Inlet 1-row
• Low Height Parallel Discharge 1-row
All others require a 7/8” OD water coil piping connections.
Note:
1. If necessary, you can change the coil connection from
left-handed to right-handed (and vice-versa) by
disconnecting the coil from the unit and rotating the
coil “like a steering wheel” 180°.
Note: Exception - Coil connection cannot be changed
on parallel fan powered unit with hot water coil
on plenum inlet.
2. Use port at the bottom for inlet and top for outlet on
single row coils. For multirow coils, always plumb in
counter flow orientation.
• Water inlet is always on the airflow downstream
side of the hot water coil.
• Water outlet is always on the upstream side of the
hot water coil.
3. Care should be taken to properly support the water coil
piping connections while connecting the adjoining
pipe.
4. It is recommended that piping to the water coil should
be done after field-mounted controls, external
insulation, and ductwork connections have been
completed.
Important: Do not connect water valve or pipe
extensions to the water coil connections
unless supported.
Unit Accessibility
• Single-duct and dual-duct units provided with hot
water reheat have an access panel located on the side
of the water coil. All other single-duct and dual-duct
units are provided without access, as all functioning
components are external to the unit.
• Fan-powered terminals are provided with a sliding side
access.
• Low-height terminal units have a removable bottom
panel.
Clearances
For proper service, it is recommended that at least 36” of
side clearance be provided to service and access singleduct and dual-duct terminals units.
• Fan-powered VAV units have a plenum inlet that must
be clear of obstructions. Allow at least 36” of clearance
in front of the side access and plenum opening.
• Low-height fan-powered terminals require the same
plenum clearance requirement that applies to the
standard fan-powered units. However the access to the
internal components is located on the bottom of the
unit.
It is also recommended that 6” of clearance be provided to
the top and bottom of all the units.
Note: The minimum clearance for controls and heater
controls should be 36” for all models except units
with 575-volt electric heaters, which require 48” of
clearance. NEC and/or local codes override all
clearance requirements.
Actuator Mounting
Important: When installing or replacing the actuator
tighten the actuator set screw per the
manufacturer’s instructions. Failure to
follow the manufacturer’s specifications
may result in unit malfunction.
Trane offers a factory-mounted actuator with a 90-second
drive time. The actuator drives 1 degree per second. A
field-installed actuator may be used if desired. The
actuator shaft has a ½-inch diameter and is designed to
travel clockwise to close the damper and counterclockwise to open the damper. There is an indicator on the
end of the actuator shaft that can be used to determine the
position of the damper.
Stand Alone UCM 4.2
When there is no communication to the UCM control and
the unit is in the stand alone mode the control action is
determined by the auxiliary temperature sensor located
on TB3-5 and TB3-6 terminals on the UCM board. In order
for the auxiliary sensor to determine the control action
(heat, cool) it must be located in the supply duct. The
auxiliary temperature is then compared to the zone
temperature. If the supply air temperature is 10 degrees
above the zone temperature, then the control action will be
heat. If the supply air temperature is less than or equal to
the zone temperature, then the control action will be cool.
If the supply air temperature is between the zone
temperature and the zone temperature + 10ºF (5.5°C)(zone
temperature < supply air temperature < zone temperature
+ 10ºF) (5.5°C), the control action remains the same and the
UCM controls to the minimum flow set point. If an
auxiliary sensor is not installed the UCM will retain the last
control action in effect
.
14 VAV-SVX08E-EN
Stand Alone VV550 LonTalk™ Control
When there is no communication to the VV550 control and
the unit is in the stand alone mode the control action is
determined by the auxiliary temperature sensor located
on TB3-5 and TB3-6 terminals on the VV550 board. The
control must also be configured through the “Inputs Tab”
of Analog Input 4 as “Primary Supply Air Sensor”. In order
for the auxiliary sensor to determine the control action
(heat, cool) it must be located in the supply inlet of the
duct. The auxiliary temperature is then compared to the
zone temperature. If the supply air temperature is 10
degrees above the zone temperature, then the control
action will be heat. If the supply air temperature is less
than or equal to the zone temperature, then the control
action will be cool. If the supply air temperature is between
the zone temperature and the zone temperature + 10ºF
(5.5°C)(zone temperature < supply air temperature < zone
temperature + 10ºF) (5.5°C), the control action remains the
same and the UCM controls to the minimum flow set
point. If an auxiliary sensor is not installed the UCM will
retain the last control action in effect.
Stand Alone UC400
When there is no communication to the UC400 control and
the unit is in the stand alone mode the control action is
determined by the auxiliary temperature sensor located
on AI5 terminals on the UC400 control. This input may
have to be changed from AI4 (Discharge Air Input) as wired
from the factory. In order for the auxiliary sensor to
determine the control action (heat, cool) it must be located
in the supply inlet of the duct. The auxiliary temperature is
then compared to the zone temperature. If the supply air
temperature is 10 degrees above the zone temperature,
then the control action will be heat. If the supply air
temperature is less than or equal to the zone temperature,
then the control action will be cool. If the supply air
temperature is between the zone temperature and the
zone temperature + 10ºF (5.5°C)(zone temperature <
supply air temperature < zone temperature + 10ºF) (5.5°C),
the control action remains the same and the UCM controls
to the minimum flow set point. If an auxiliary sensor is not
installed the UCM will retain the last control action in
effect.
Unit Installation
VAV-SVX08E-EN 15
Unit Installation
Water
Coil
Airflow
Plenum Inlet
Optional Attenuator
Field Installed
Primary
Airflow
TOP VIEW
Parallel Cooling & Hot Water
Flow Ring
Tubing
Air
Valve
Airflow
Discharge Outlet
A
B
C
D
EF
ADE
F
B
C
FAN SIZE
02SQ
03SQ, 04SQ, 05SQ
06SQ, 07SQ
26.75" (679 mm)
26.75" (679 mm)
26.75" (679 mm)
26.75" (679 mm)
29.75" (756 mm)
36.75" (933 mm)
41.154" (1041 mm)
41.154" (1041 mm)
41.154" (1041 mm)
3.25" (83 mm)
3.25" (83 mm)
3.25" (83 mm)
20.00" (508 mm)
20.00" (508 mm)
20.00" (508 mm)
38.95" (989 mm)
38.95" (989 mm)
38.95" (989 mm)
Airflow
Plenum Inlet
Optional Attenuator
Field Installed
Primary
Airflow
TOP VIEW
Parallel Electric Heat
Flow Ring
Tubing
Air
Val ve
Airflow
Discharge Outlet
A
D
EF
B
C
Heater
Terminal Box
43.546
(1106 mm)
Figure 11. Parallel hanger bracket locations sizes
16 VAV-SVX08E-EN
Figure 12. Series hanger bracket locations
Water
Coil
Airflow
Plenum Inlet
Optional Attenuator
Field Installed
TOP VIEW
Series Cooling & Hot Water
Flow Ring
Tubing
Air
Valve
A
D
B
C
TOP VIEW
Series Electric Heat
1.
1.
2.
1.625"
(41 mm)
All attenuators are the same length and width.
Sizes 01 and 02 units are smaller than attenuators.
Airflow
Plenum Inlet
Optional Attenuator
Field Installed
Flow Ring
Tubing
Air
Valve
A B
Electric
Heater
D
G
F
C
B
B
C
A D E
FAN SIZE
(Elec. Heat Only)
3.25" (83 mm)
3.25" (83 mm)
3.25" (83 mm)
3.25" (83 mm)
41.154" (1041 mm)
41.154" (1041 mm)
41.154" (1041 mm)
41.154" (1041 mm)
41.154" (1041 mm)
41.154" (1041 mm)
41.154" (1041 mm)
26.75" (679 mm)
26.75" (679 mm)
26.75" (679 mm)
26.75" (679 mm) 02SQ
06SQ, 07SQ
03SQ, 04SQ
05SQ 26.75" (679 mm)
20.75" (527 mm)
18.75" (476 mm)
27.25" (692 mm)
35.154 (740 mm)
23.875 (606 mm)
29.875" (759 mm)
28.966" (736 mm)
20.132" (511 mm)
Fan Inlet w/o
Attenuator
Fan Inlet w/o
Attenuator
F
C
E
2.
J
(Elec. Heat Only)
59.750” (1517 mm)
58.250" (1479 mm)
59.750" (1517 mm)
53.750" (1365 mm)
G
(Elec. Heat Only)
19.00" (483 mm)
17.50" (445 mm)
19.00" (483 mm)
19.00" (483 mm)
J
Unit Installation
VAV-SVX08E-EN 17
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