Trane HUV Installation and Maintenance Manual

Installation, Operation,
and Maintenance

Horizontal Unit Ventilator

Classroom Unit Ventilator—Model HUV

Models
HUVC

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.

January 2013 UV-SVN02C-EN

“C” and later Design Sequence
750 cfm—2000 cfm

SAFETY WARNING

Warnings, Cautions, and Notices

Warnings, Cautions, and Notices. Note that

warnings, cautions, and notices appear at appropriate
intervals throughout this manual. Warnings are provide to
alert installing contractors to potential hazards that could
result in personal injury or death. Cautions are designed to
alert personnel to hazardous situations that could result in
personal injury, while notices indicate a situation that
could result in equipment or property-damage-only
accidents.

Your personal safety and the proper operation of this
machine depend upon the strict observance of these
precautions.

Proper Field Wiring and Grounding
Required!

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. Failure to
follow code could result in death or serious injury.

WARNI NG

ATT EN TI ON : Warnings, Cautions, and Notices appear at

appropriate sections throughout this literature. Read
these carefully:

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

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.

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. ALWAYS refer to appropriate MSDS
sheets and OSHA guidelines for proper PPE.

• When working with or around hazardous chemicals,
ALWAYS refer to the appropriate MSDS sheets and
OSHA guidelines for information on allowable
personal exposure levels, proper respiratory
protection and handling instructions.

• If there is a risk of arc or flash, technicians MUST put
on all PPE in accordance with NFPA 70E or other
country-specific requirements for arc flash
protection, PRIOR to servicing the unit.

Failure to follow instructions could result in death or
serious injury.

WARNI NG

Contains Refrigerant!

System contains oil and refrigerant under high
pressure. Recover refrigerant to relieve pressure before
opening the system. See unit nameplate for refrigerant
type. Do not use non-approved refrigerants, refrigerant
substitutes, or refrigerant additives.

Failure to follow proper procedures or the use of non­approved refrigerants, refrigerant substitutes, or
refrigerant additives could result in death or serious
injury or equipment damage.

© 2013 Trane All rights reserved UV-SVN02C-EN

WARNING

R-410A Refrigerant under Higher Pressure
than R-22!

Some of the units described in this manual uses R-410A
refrigerant which operates at higher pressures than
R-22 refrigerant. Use ONLY R-410A rated service
equipment or components with this unit. For specific
handling concerns with R-410A, please contact your
local Trane representative.

Failure to use R-410A rated service equipment or
components could result in equipment or components
exploding under R-410A high pressures which could
result in death, serious injury, or equipment damage.

WARNING

Hazard of Explosion!

Use only dry nitrogen with a pressure regulator for
pressurizing unit. Do not use acetylene, oxygen or
compressed air or mixtures containing them for
pressure testing. Do not use mixtures of a hydrogen
containing refrigerant and air above atmospheric
pressure for pressure testing as they may become
flammable and could result in an explosion. Refrigerant,
when used as a trace gas should only be mixed with
dry nitrogen for pressurizing units. Failure to follow
these recommendations could result in death or serious
injury or equipment or property-only damage.

Warnings, Cautions, and Notices

Trademarks

ComfortLink, Rover, Tracer, Tracer Summit, Trane, and the
Trane logo are trademarks or registered trademarks of
Trane in the United States and other countries. All
trademarks referenced in this document are the
trademarks of their respective owners.

BACnet is a registered trademark of American Society of
Heating, Refrigerating and Air-Conditioning Engineers
(ASHRAE); Echelon, LonTalk, and L
trademarks of Echelon Corporation; Energizer is a
registered trademark of Eveready Battery Company, Inc.;
National Electrical Code, National Fire Protection
Association, and NEC are registered trademarks of the
National Fire Protection Association.

UV-SVN02C-EN 3

ONWORKS are registered

Table of Contents

Model Number Descriptions . . . . . . . . . . . . . . 6

General Information . . . . . . . . . . . . . . . . . . . . . 8

Unit Description . . . . . . . . . . . . . . . . . . . . . 8

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Unit Ventilator Controls . . . . . . . . . . . . . . 10

ECM Application Notes . . . . . . . . . . . . . . . . . . 12

Dimensions and Weights . . . . . . . . . . . . . . . . 13

Unit Location and Clearances . . . . . . . . . 13

Receiving and Handling . . . . . . . . . . . . . . . . . 19

Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . 20

Jobsite Inspection . . . . . . . . . . . . . . . . . . 20

Jobsite Storage . . . . . . . . . . . . . . . . . . . . 20

Installation—Mechanical . . . . . . . . . . . . . . . . 21

Location Considerations . . . . . . . . . . . . . . . 21

Unit Mounting . . . . . . . . . . . . . . . . . . . . . . . 21

Horizontal Recessed Mounting . . . . . . . . 21

Installation—Piping . . . . . . . . . . . . . . . . . . . . . 23

Trane Piping Packages (Option) . . . . . . . 23

Split System Units . . . . . . . . . . . . . . . . . . 23

Refrigerant Piping . . . . . . . . . . . . . . . . . . 23

Steam Piping . . . . . . . . . . . . . . . . . . . . . . 24

Modulating Water Valves (Option) . . . . . 24

Plumbing . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Manual Opener . . . . . . . . . . . . . . . . . . . . . 26

Isolation Valves . . . . . . . . . . . . . . . . . . . . . . 26

Installation . . . . . . . . . . . . . . . . . . . . . . . . 26

Servicing/Removal of Valves . . . . . . . . . . 26

Heating Coils with Direct Expansion Cooling

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Installation—Sensors . . . . . . . . . . . . . . . . . . . 28

Control Options . . . . . . . . . . . . . . . . . . . . . . 28

Installing Wall-Mounted Wired Sensors . 29

Location Considerations . . . . . . . . . . . . . 30

Location Considerations for Wireless Zone

Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Fan Mode Switch Installation . . . . . . . . . 30

Zone Sensor Installation . . . . . . . . . . . . . 30

Wireless Sensors . . . . . . . . . . . . . . . . . . . . . 31

Address Setting . . . . . . . . . . . . . . . . . . . . 31

Observing the Receiver for Readiness to As-

sociate . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Associating the Sensor to the Receiver . .32

Testing Signal Strength and Battery Status

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Configuring the Wireless Display Sensor

(Model WDS only) . . . . . . . . . . . . . . . . . . .34

Sensor Operations . . . . . . . . . . . . . . . . . . .36

Wireless Sensor Specifications . . . . . . . . . 39

Installation—Electrical . . . . . . . . . . . . . . . . . . .41

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Electrical Wiring . . . . . . . . . . . . . . . . . . . . .41

Electric Heat Units . . . . . . . . . . . . . . . . . . . 41

Heating Coils with Direct Expansion Cooling

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

ECM Overview and Setup . . . . . . . . . . . . . . . . 43

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

General Information . . . . . . . . . . . . . . . . . . .43

Trane BLDC Motor . . . . . . . . . . . . . . . . . . .43

ECM Engine Controller . . . . . . . . . . . . . . .43

Standard Adapter Board . . . . . . . . . . . . . .44

CSTI Adapter Board . . . . . . . . . . . . . . . . . .44

Installation and Initial Setup . . . . . . . . . . . .45

Installation and Initial Setup . . . . . . . . . . .45

Adjustment and Configuration of the Engine

Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Status Display . . . . . . . . . . . . . . . . . . . . . . .48

Initial Setup and Configuration . . . . . . . . .53

Configuration . . . . . . . . . . . . . . . . . . . . . . . . .53

Configuring the ECM Engine Controller . .53

Configuring the ECM Engine Board . . . . .58

Time Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Setting the Time Clock . . . . . . . . . . . . . . . .63

Wired Controllers—Communication Wiring 65

Wiring Installation (Tracer ZN520) . . . . . . .65

Device Addressing . . . . . . . . . . . . . . . . . . .65

Recommended Communication Wiring Prac-

tices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Wiring Installation (Tracer UC400) . . . . . . .65

Wiring Overview Outline . . . . . . . . . . . . . .66

4 UV-SVN02C-EN

General Instructions . . . . . . . . . . . . . . . . . 66

BACnet MS/TP Link . . . . . . . . . . . . . . . . . 66

Power Supply . . . . . . . . . . . . . . . . . . . . . . 67

Pre-Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Pre-Start-up Checklist . . . . . . . . . . . . . . . 69

Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Tracer ZN520 Unit Startup . . . . . . . . . . . . 70

Tracer UC400 Unit Startup . . . . . . . . . . . 70

General Information . . . . . . . . . . . . . . . . . 70

Fan Mode Switch Operation . . . . . . . . . . 70

Tracer ZN520 Operation . . . . . . . . . . . . . 70

UC400 Controller Operation . . . . . . . . . . 71

Tracer ZN520 Sequence of Operation . . . 71

Cooling Operation (Tracer ZN520) . . . . . 72

Fan Mode Operation (Tracer ZN520) . . . 73

UC400 Sequence of Operation . . . . . . . . . 78

Power-up Sequence (UC400) . . . . . . . . . 78

Random Start (UC400) . . . . . . . . . . . . . . . 78

Occupancy Modes (UC400) . . . . . . . . . . . 78

Timed Override Control (UC400) . . . . . . 79

Zone Temperature Control (UC400) . . . . 79

Discharge Air Tempering (UC400) . . . . . 80

Heating or Cooling Mode (UC400) . . . . . 80

Entering Water Temperature Sampling Func-

tion (UC400) . . . . . . . . . . . . . . . . . . . . . . . 80

Fan Operation (UC400) . . . . . . . . . . . . . . 80

Exhaust Control (UC400) . . . . . . . . . . . . . 81

Valve Operation (UC400) . . . . . . . . . . . . . 81

Modulating Outdoor/Return Air Damper

(UC400) . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Two-position Control Of A Modulating Out-

door Air Damper (UC400) . . . . . . . . . . . . 83

Electric Heat Operation (UC400) . . . . . . . 83

Dehumidification Operation (UC400) . . . 83

Peer-to-peer Communication (UC400) . . 83

Unit Protection Strategies (UC400) . . . . . 83

Removal of the Drain Pan . . . . . . . . . . . . .85

Removal of the Fanboard and Coil Cleaning

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

Lubrication: Fan Shaft . . . . . . . . . . . . . . . .86

Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

Modulating Valves (3-Wire Floating) . . . .87

Preventive Maintenance . . . . . . . . . . . . . . . .87

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

Troubleshooting Checklist . . . . . . . . . . . . .88

Output Testing and Diagnostics (Tracer
ZN520)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

Output Testing and Diagnostics (UC400) . .93

Output Testing (UC400) . . . . . . . . . . . . . . .93

Diagnostics (UC400) . . . . . . . . . . . . . . . . . 93

Troubleshooting (Wireless Controls) . . . . .94

Troubleshooting (Tracer ZN520) . . . . . . .100

Troubleshooting (UC400) . . . . . . . . . . . .101

Troubleshooting (ECM) . . . . . . . . . . . . . .103

General Information (ECM) . . . . . . . . . . .104

Troubleshooting Information (ECM) . . .104

Replacing ECM Components . . . . . . . . . . . .106

Circuit Modules Replacement Notes/Work In-

structions . . . . . . . . . . . . . . . . . . . . . . . . .107

Softsetting the IMC Address of an ECM En-

gine Module . . . . . . . . . . . . . . . . . . . . . . . 107

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

Wallboxes . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

General Instructions . . . . . . . . . . . . . . . . .109

Installation in Masonry Walls . . . . . . . . .111

Installation in Curtain Walls . . . . . . . . . .111

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Service Access . . . . . . . . . . . . . . . . . . . . . 85

Periodic Maintenance . . . . . . . . . . . . . . . 85

Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

UV-SVN02C-EN 5

Model Number Descriptions

Digit 1, 2, 3 — Unit
Configuration

HUV = Horizontal Unit Ventilator

Digit 4 — Development
Sequence

C = Third Generation

Digit 5, 6, 7 — Development
Sequence

075 = 750 CFM
100 = 1000 CFM
125 = 1250 CFM
150 = 150 0 CFM
200 = 2000 CFM

Digit 8 — Unit Incoming Power
Supply

1 = 120V/60/1
2 = 208V/60/1
3 = 208V/60/3
4 = 240V/60/1
5 = 240V/60/3
6 = 277V/60/1
8 = 480V/60/3-Phase 4-Wire Power

Supply

Digit 9 — Motor

0 = Free Discharge ECM
4 = Free Discharge ECM, Low

Acoustics

7 = Free Discharge ECM, Low FLA

Option

N = Free Discharge, Low Acoustics,

Low FLA
A = High Static ECM
E = High Static ECM, Low Acoustics
H = High Static ECM, Low FLA

Option
K = High Static ECM, Low Acoustics,

Low FLA

Digit 10, 11 — Design Sequence

** = Design Sequence

Digit 12, 13 — Coil Letter
Designation

(Single Coil Options)

AA = 2 R, 12 FPI CW/HW Changeover
AB = 2 R, 16 FPI CW/HW Changeover
AC = 3 R, 12 FPI CW/HW Changeover
AD = 4 R, 12 FPI CW/HW Changeover
AE = 4 R, 16 FPI CW/HW Changeover
H1 = 1 R, 12 FPI Heating Coil
H2 = 1 R, 14 FPI Heating Coil
H3 = 1 R, 16 FPI Heating Coil
H4 = 2 R, 12 FPI Heating Coil
H5 = 2 R, 14 FPI Heating Coil
H6 = 2 R, 16 FPI Heating Coil
K1 = 1 R Low Capacity Steam Coil
K2 = 1 R High Capacity Steam Coil
E4 = 4 Element Heating Only Coil
E6 = 6 Element Heating Only Coil
E8 = 8 Element Heating Only Coil
G0 = 2 R, 12 FPI DX Coil

(Coupled Coil Options)

DA = 1 R, 12 FPI HW Coil with 2 R,

12 FPI CW Coil

DC = 1 R, 12 FPI HW Coil with 2 R,

14 FPI CW Coil

DD = 1 R, 12 FPI HW Coil with 3 R,

12 FPI CW Coil

DE = 1 R, 14 FPI HW Coil with 3 R,

14 FPI CW Coil
DK = 1 R Steam with 3 R CW Coil
X3 = 3 Element Elec Coil with

3 R CW Coil (2 R on Sz 125)
X4 = 4 Element Elec Coil with

3 R CW Coil (2 R on Sz 125)
X6 = 6 Element Elec Coil with

3 R CW Coil (2 R on Sz 125)
GK = 1 R Steam Coil with 2 R DX Coil
GA = 1 R Heating coil with 2 R DX Coil
G3 = 3 Element Elec Heat Coil with

2 R DX Coil
G4 = 4 Element Elec Heat Coil with

2 R DX Coil
G6 = 6 Element Elec Heat Coil with

2 R DX Coil
R1 = 3 R, 12 FPI CW Coil with 1 R,

12 FPI HW Coil
R2 = 3 R, 14 FPI CW Coil with 1 R,

12 FPI HW Coil

Digit 14 — Coil Connections

A = Right Hand Supply
B = Left Hand Supply
C = Left Hand Cool/Right Hand Heat
D = Right Hand Cool/Left Hand Heat

Digit 15 — Control Types

0 = Unit-Mounted Speed Switch
Q = Tracer™ ZN520
R = Tracer ZN520 w/Low Temp
T = Tracer ZN520 w/Time Clock
U = Tracer ZN520 w/Low Temp &

Time Clock
X = Tracer ZN520 ICS w/Fan Status
Y = Tracer ZN520 ICS w/Low Temp &

Fan Status
8=CSTI
9 = CSTI w/Low Temp
L = Tracer UC400
M = Tracer UC400 w/Time Clock

Digit 16 — Heating/Change Over
Coil Control

0=None
1 = Face & Bypass Damper Actuator
2 = 2-Pipe Face & Bypass Damper

Control
3 = 4-Pipe Face & Bypass Damper

Control & Isolation Valve
4 = Single Stage Electric Heat

Control
5 = Dual Stage Electric Heat
7 = Face & Bypass Damper w/2-Pipe

Control & Isolation Valve
9 = 2-Way 1/2-in. 3.3 CV; 3-Wire Mod
W = 2-Way 1/2-in. 1.9 CV; 3-Wire Mod
G = 2-Way 3/4-in. 4.7 CV; 3-Wire Mod
H = 2-Way 1-in. 6.6 CV; 3-Wire Mod
Z = 3-Way 1/2-in. 1.9 CV; 3-Wire Mod
Q = 3-Way 1/2-in. 3.8 CV; 3-Wire Mod
R = 3-Way 3/4-in. 6.6 CV; 3-Wire Mod
T = Steam: 3-Wire Mod 1/2-in. 1.9 CV
U = Steam: 3-Wire Mod 1/2-in. 4.7 CV
V = Steam: 3-Wire Mod 3/4-in. 8.6 CV

Digit 17 — Cooling Coil Control

0=None
1 = Single Stage DX Controls
A = Field-Supplied Analog Valves
W = 2-Way 1/2-in. 1.9 CV; 3-Wire Mod
G = 2-Way 3/4-in. 4.7 CV; 3-Wire Mod
H = 2-Way 1-in. 6.6 CV; 3-Wire Mod
Z = 3-Way 1/2-in. 1.5 CV; 3-Wire Mod
Q = 3-Way 1/2-in. 3.8 CV; 3-Wire Mod
R = 3-Way 3/4-in. 6.6 CV; 3-Wire Mod

Digit 18 — Damper
Configuration

0 = Field Installed Damper Actuator
1 = 100% Return Air/No Damper or

Actuator

(Modulating ASHRAE Cycle II)

F = RA/OA Damper and Actuator

(2–10 Vdc)
A = RA/OA Damper and Actuator

(3-Point Modulating)
E = RA/OA Damper and Actuator

with Exhaust (3-Point Mod)

(Two Position Control)

D = Damper w/Manual Quad Adjust

6 UV-SVN02C-EN

Model Number Descriptions

Digit 19 — Zone Sensor/Fan
Speed Switch

0 = No Sensor - Unit Mounted Fan

Speed Switch

J = Wall Mt Zone Sensor (OALMH;

Setpoint Dial; On/Cancel)

K = Wall Mt Zone Sensor (OALMH;

Setpoint Dial)

L = UNIT Mt Zone Sensor (OALMH;

Setpoint Dial)

M = Wall Mount Display Sensor

w/Setpoint Adjust

P = Wall Mt Sensor (Setpoint dial;

On/Cancel) w/Unit-Mt Speed
Switch

Q = Wall Mt Sensor (Setpoint Dial)

w/Unit Speed Switch

3 = Wireless Display Sensor

(H-L-A-O)

4 = Wireless Sensor - Ext Adjust

Digit 20 — Inlet Arrangement

A = FA Duct Top/RA Duct Lower Back
B = FA Duct Top/RA Duct Bottom
C = FA Duct Top/RA Bar Grille

Bottom
D = FA Duct Top/RA Open Bottom
E = 100% FA Duct Top
F = FA Duct Upper Back/RA Duct

Lower Back
G = FA Duct Upper Back/RA Duct

Bottom
H = FA Duct Upper Back/RA Bar

Grille Bottom
J = FA Duct Upper Back/RA Open

Bottom (no grille)
K = 100% FA Duct Upper Back
L = 100% RA Duct Lower Back
M = 100% RA Duct Bottom
N = 100% RA Bar Grille Bottom
P = 100% RA Open Bottom (no grille)

Digit 21 — Discharge
Arrangement

1 = Bar Grille Discharge
2 = Duct Collar Discharge 7-1/8 in.

from Top
3 = Duct Collar Discharge 3/4 in.

from Top
4 = Duct Collar Discharge 3-5/8 in.

from Top
5 = Front Double Deflection Grille

Discharge
6 = Front Double Deflection Opening

Only (no grille)
7 = Bottom w/Double Deflection

Grille

Digit 22 — Unit Access Panel

0 = Std. Horizontal Access Panel
1 = Safety Chain/Std. Access Panel
2 = Removable Access Panel
3 = Safety Chain/Removable

Access Panel

Digit 23 — Recessing Flange

0 = No Recessing Flange
1 = Standard Recessing Flange

Digit 24 — Piping Package

0 = No Factory Installed Piping

A = Package 1; Standard Package
C = Package 2; Standard Package

D = Package 3; Standard Package

Package

w/Circuit Setter

w/Strainer and Circuit Setter

Digit 25 — Filter

1 = Throwaway Filter
2 = MERV 8 Filter
3 = MERV 13 Filter

Digit 26 — Color Selection

1 = Deluxe Beige Cabinet
2 = Cameo White Cabinet
3 = Soft Dove Cabinet
4 = Stone Gray Cabinet
5 = Driftwood Gray Cabinet

Digit 27 — Motor Disconnect

0 = No Disconnect
A = Non-Fused Toggle
B = Circuit Breaker

Digit 28 — Control Accessories

0=None
A= C0
B = Wall Mounted Relative Humidity

2

Sensor

Sensor

UV-SVN02C-EN 7

General Information

Unit Description

Configuration. This classroom unit ventilator is

configured in a horizontal (ceiling mount) configuration.
The units range from 750 cfm to 2000 cfm for the
horizontal configuration.

Cabinet. The units are constructed of 14- and 16-gauge

zinc coated steel. All steel surfaces are cleaned,
phosphatized, rinsed and dried before application of final
finish paint. The paint is applied by an electrostatic powder
spray system, minimum thickness of 1.5 mil which results
in an appliance grade finish.

Front Panels. The front panels are retained by Allen

wrench operated locks which open with a 180-degree
rotation.

The bottom panel is constructed of heavy gauge material.

End Pockets. Unit Ventilators are equipped with end

pockets to provide field installation of valves, piping, and
controls. The units have a large pipe access opening in
both end pockets and large knockouts for piping and
electrical connections. All electrical connections are made
in the left-hand end pocket, with exception of units
equipped with the electric heating coil option.

Drain Pan. The drain pan is positively sloped in all planes

to assure proper drainage and help eliminate the risk of
microbial growth. To help ensure indoor air quality, the
drain pan is insulated on the bottom to help prevent
condensate formation. The drain pan can be easily
removed for cleaning purposes. The drain pan is drilled­out and pitched toward the cooling coil connection during
assembly per model number selection.

are permanently lubricated. Motors are capable of starting
at 50 percent of rated voltage and operating at 90 percent
of rated voltage on all speed settings. Motors can operate
up to 10 percent over voltage.

Filter. Standard units are equipped with a single 1-inch

thick filter (MERV 8) that is accessible without removal of
the unit front panel. Filter options include throwaway,
MERV 8 and MERV 13 options.

OA/RA Damper. Trane unit ventilators are equipped

with dual blade type mixing damper to ensure proper
modulation and mixing of return and outdoor air designed
in accordance to ARI 840. A splitter is placed between the
damper blades to separate the fresh-air and return-air
compartments to prevent draft blow-through.

Options

OA/RA Actuator (Option). The OA/RA actuator

provides true spring return operation for positive close-off
of the OA/RA damper. The spring return system of the
actuator closes the outside damper if power is lost to the
building. When ordered with factory mounted controls,
the actuator is 3-point floating. A 2 to 10 Vdc actuator is
also available when other than Trane controls is required.
See Ta b l e 1 , p . 8 for technical data of the OA/RA actuator.

Table 1. Technical data for OA/RA actuator

Fanboard. The fanboard assembly is acoustically

designed in a single, rigid assembly that includes the fans,
fan housing, bearings, fan shaft and motor. The fan motor
is mounted on the fanboard. The fanboard is made from
14-gauge galvanized steel to resist corrosion and increase
strength.

Electrically Commutated Motor (ECM). All motors

are brushless DC (BLDC)/electronically commutated
motors (ECM) factory-programmed and run-tested in
assembled units. The motor controller is mounted in a
control box with a built-in integrated user interface and
LED tachometer. If adjustments are needed, motor
parameters can be adjusted through momentary contact
switches accessible without factory service personnel on
the motor control board.

Motors will soft-ramp between speeds to lessen the
acoustics due to sudden speed changes. Motors can be
operated at three speeds or with a field-supplied variable
speed controller. The motor will choose the highest speed
if there are simultaneous/conflicting speed requests.

All motors have integral thermal overload protection with
a maximum ambient operating temperature of 104°F and

8 UV-SVN02C-EN

Power Supply 24 Vac ±20% 50/60Hz

24 Vac ±10%
Power Running: 2.5W
Consumption Holding: 1W
Transformer Sizing 5VA (class 2 power source)
Overload Electronic throughout
Protection 0- to 95-degree rotation
Control Signal 2–10 Vdc 3 point floating w/ Trane controls
Rotation Angle 95-degree max. Adjustable w/mechanical stop
Torque 35-inch/lb
Rotation Direction Spring return reversible w/CW/CCW mounting
Position Indication Visual indicator, 0- to 95-degrees
Noise Level Running: 30dB

General Information

Face and Bypass (Option). The face and bypass option

consist of an actuator, damper blade and 2-position water
valve (option).

During bypass mode, the damper moves to prevent air
from traveling through the coil. The damper blade is
tightly sealed to eliminate heat pickup while in the full
bypass mode.

A two-position isolation valve control (option) further
enhances this system by closing off all water flow to the
coil during full bypass operation. Two-pipe main steam
systems utilize the face and bypass as part of the standard
operation and may incorporate the optional isolation
valve.

Face and Bypass Actuator (Option). The face and

bypass damper actuator incorporates a direct couple
design for the horizontal configurations. The actuator is
provided with electronic protection against overload. It
does not contain, nor require a limit switch. When reaching
the damper end position, the actuator automatically stops.
The gears can be manually disengaged with a button on
the actuator housing. See Tab l e 2 for technical data.

Table 2. Technical data for face and bypass actuator

The actuator on the valve is a 24V, 3-point floating type.
See Ta b l e 3 , p . 9 for more technical data.

Table 3. Technical data for modulating water valves

Power Supply 24V - 50/60 Hz
Power Consumption 4W
Maximum Duty Cycle 15%
Operating Ambient Temperature 0°C to 65°C

32°F to 150°F

Min./Max. Fluid Temperatures 1°C to 95°C

34°F to 203°F
Operating Pressure Differential Max. - 4 bar (60 psi)
Pressure Rating Static - 20 bar (300 psi)

Burst - 100 bar (1500 psi)
Flow Characteristics Linear

Power Supply 24 Vac ±20% 50/60Hz

24 Vac ±10%
Power Consumption 2W
Transformer Sizing 3VA (class 2 power source)
Manual Override External push button
Control Signal 3-point floating w/Trane controls
Rotation Angle 95-degree max. Adjustable w/mechanical stop
Torque 35-inch/lb
Rotation Direction Reversible with switch L/R
Position Indication Clip-on indicator
Noise Level Less than 35dB

Modulating Water Valves (Option). The modulating

control valve option provides optimum control of hot and
chilled water flow in various heating and cooling
applications. They are designed to provide sinusoidal
valve actuator travel and operate silently, resisting water
hammer.

Isolation Valves (Option). The isolation valves are two

position 24V, spring return type. They provide added
control in heating and cooling applications when used in
conjunction with the face and bypass damper.

On heating coils and two-pipe change-over applications,
the valve is a normally open type to prevent the coil from
freezing in case of power loss.

For cooling, the valve is normally closed and opens when
there is a call for cooling. See Table 4, p. 10 for more
technical data.

UV-SVN02C-EN 9

General Information

Table 4. Technical data for isolation water valves

Power Supply 24V - 50/60 Hz
Power Consumption 5W
Max. Fluid Temp. 200°F / 94°C
Min. Fluid Temp. 34°F / 1°C
Max. Operating Pressure 300 psi
Max. Close-off Pressure 1/2 in.= 30 psi

3/4 = 20 psi
1 = 15 psi

Unit Ventilator Controls

Options

Field-Installed Controls (Option). The unit comes

equipped with a fan speed switch, damper blade (only),
and an optional low temperature detection.

Customer Supplied Terminal Interface (CSTI)
(Option).

will incorporate a pre-wired, selected control components
to a terminal strip for wiring a field-provided controller and
temperature sensor.

Note: For controller operation malfunction of any non-

Tracer ZN520 Control Package (Option). The Tracer

ZN520 electronic digital controller is a factory installed,
tested and commissioned LonTalk
may be used in a stand-alone control scheme, or as part of
a building automation system. The controller is pre-wired
to Trane selected control components best suited for room
comfort. For more information on the Tracer ZN520 unit
controller operation and service issues, refer to
CNT-SVX04A-EN (Installation, Operation, and
Programming Guide: Tracer ZN520 Unit Controller), or the
most recent version.

Units containing the end device control design

Trane, field installed controls, consult the literature
or technical support of the controls manufacturer.

®

certified design. It

Figure 1. Tracer ZN520 unit controller

Tracer UC400 Control Package (Option). The Tracer

UC400 electronic digital controller is a factory installed,
tested and commissioned BACnet
Tracer UC400 operates as a single zone VAV controller and
ramps fan speed based on space load. It may be used in a
stand-alone control scheme, or as part of a building
automation system. The controller is mounted, pre-wired,
and pre-programmed to selected control components
best suited for room comfort. For more information on the
Tracer UC400 unit controller operation and service issues,
refer to BAS-SVX48B-EN (Installation, Operation, and

10 UV-SVN02C-EN

®

certified design. The

Programming: Tracer UC400 Programmable Controller),
or the most recent version.

Figure 2. Tracer UC400 unit controller

When Trane controls are ordered for an installation, the
controls are shipped already installed and factory-tested
to ensure proper operation at start-up.

Notes:

• For more details on the ZN520 unit controller option or

operation and service/replacement issues, please refer
to CNT-SVX04A-EN (Installation, Operation, and
Programming Guide: Tracer ZN520 Unit Controller), or
the most recent version.

• For more details on the UC400 unit controller option or

operation and service/replacement issues, refer to
BAS-SVX48B-EN (Installation, Operation, and
Programming: Tracer UC400 Programmable
Controller), or the most recent revision.

General Information

Automatic Controls

Regardless of type of controls, all systems provide a
sequence of operation designed to provide rapid warm-up
of the room and increase ventilation while offsetting
overheating.

In addition, air conditioning installations will usually
provide a means of system changeover from heating to
cooling as well as provisions for drawing a pr e-determined
amount of outside air into the room.

Unit Switch

The unit “On-Off” switch, provided by Trane, is typically
housed in the control box mounted in the left hand end
pocket immediately below the discharge grille.

When Tracer ZN520 or Tracer UC400 unit controllers are
used, the unit switch is located on the switch module in the
end pocket behind the front panel rather than below the
grille.

UV-SVN02C-EN 11

ECM Application Notes

The new Trane BLDC system has some notable differences
to traditional designs.

RPM Mode

The motors are programmed from the factory to run in
rpm mode and will not change rpm based on external
static pressure, except at the performance limits of the
motor/controller. For ducted units, the units are shipped
with the rpm set for 0.2 in. ESP for High, Medium, and Low
speeds. The speeds can for high, medium, and low
operation, but should not be changed for the electric heat
actuation speeds.

Generally, the fans deliver less cfm for the same rpm, if the
static is increased and the power will decrease. The fan will
deliver more cfm for the same rpm, if the static is
decreased and the fan power will increase. A unit with high
static configuration should not be used to free-deliver air
(i.e., with no ducting attached).

Field Power Wiring

Note: This product uses an electronic variable speed

motor control, which includes a line reactor to
minimize power line harmonic currents. It is
recommended that good wiring practices be
followed to manage building electrical power
system harmonic voltages and currents to avoid
electrical system problems or other equipment
interaction.

Performance Boundaries

While the speeds of the fan motors can be adjusted, never
program a fan speed higher than 1700 rpm, or lower than
450 rpm. In many cases, units configured for high-static
operation will not achieve the desired rpm if the ESP of the
unit is too low, or the unit is allowed to “free-discharge.”
The ECM engine contains settings that will limit the output
power of the motor under these overload conditions. If the
motors cannot achieve rpm close to the target for a specific
period of time, the unit will disable electric heat and fan­status indicators.

perform the function of a two 3-pole contactors.

Figure 3. Sample arrangement: electric heat relay

Troubleshooting Other Unit Functions

In some cases, the normal or abnormal operation of the
BLDC system may interact with other components in the
system. Generally, verification of the engine and adapter
boards’ wiring and configuration should be checked if
there are unexplained abnormalities in other areas of the
unit:

1. Valve operation

2. Electric Heat operation

3. Changeover sensor operation

4. Damper operation

5. Condensate overflow switch

A high degree of protection is provided on electric heat

nits. If electric heat fails to actuate, it may be because of

u
one of the following events:

1. Fans are failing to meet target speed. If a second motor
is not present, all settings for speeds for Motor 2
should be set to 0000.

2. Hot water may be available in the changeover coil.

3. The connection to analogue input 1 on the Tracer ZN
controlle

4. Target speeds for motor
a. The  parameter may be set incorrectly.

b. The

r may be reversed in polarity.

s may be set too high:

 parameter may be set incorrectly.

MCA/MFS and Power Draw

The Trane BLDC motors have variable output but are
shipped at specific settings to deliver proper performance
and reliability. The power draw indicated in the catalogue
indicates the power consumed when applied properly (as
shipped and with the nominal ESP applied). However, the
nameplate of the unit indicates the maximum input draw
of the motor, as the motor settings can be changed to draw
more power.

Electric Heat Relays

For quiet operation, the new BLDC units employ power
relays instead of definite purpose contactors for electric
heat actuation. The coils of multiple relays are hooked in
parallel to simulate a multi-pole contactor, as shown in

Figure 3. In Figure 3, two sets of three relays are used to

12 UV-SVN02C-EN

Dimensions and Weights

Unit Location and Clearances

Locate the unit in an indoor area. The ambient
temperature surrounding the unit must not be less than
45°F. Do not locate the unit in areas subject to freezing.

Electrocution and Fire Hazards with
Improperly Installed and Grounded Field
Wiring!

NOTICE:

Equipment Damage!

Do not locate the unit in areas subject to freezing. Pipes
could burst at lower temperature resulting in
equipment damage.

Attention should be given to service clearance and
technician safety. The unit should contain enough space
for service personnel to perform maintenance or repair.
Provide sufficient room to make water, and electrical
connection(s).

Table 5. Weights and measurements: horizontal unit ventilators

Unit Size 075 100 125 150 200

Unit Length (in.) 70-1/4 82-1/4 94-1/4 106-1/4 106-1/4
Unit Height (in.) 16-5/8 16-5/8 16-5/8 16-5/8 17-5/8
Unit Width (Front Discharge) (in.) 35-5/8 35-5/8 35-5/8 35-5/8 43-1/8
Unit Width (Bottom Discharge) (in.) 48-3/4 48-3/4 48-3/4 48-3/4 57-1/4
Shipping Weight (lb)
Filter Size (inches-actual) 41-1/2 x 15-1/4 x 1 53-1/2 x 15-1/4 x 1 65-1/2 x 15-1/4 x 1 77-1/2 x 15-1/4 x 1 77-1/2 x 15-1/4 x 1

(a) Working weight is approximately 10% less than shipping weight. Trane recommends 1/4-inch rods for hanging suspension

(a)

340* 375* 435* 500* 600*

Improperly installed and grounded field wiring poses
FIRE & 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. All field wiring MUST
be performed by qualified personnel.

Failure to follow these requirements could result in
death or serious injury.

A 36-inch clearance at the unit front is sufficient for
maintenance and service of the equipment.

WARNING

Table 6. Control methodology

Fan Speed

FSS 3 or infinite
CSTI 3 or infinite
Tracer ZN520 3
Tracer UC400 Infinite

(a)With a field-supplied 2–10 Vdc controller.

(a)
(a)

Table 7. Control sequences

Fan Speeds

(b)

(a)

(b)

(a)

1
1
2
2

DX operation
Electric heat operation
Sidewall Exhaust
ERSA

(a) Fan speed during sequence operation.
(b)Unit Ventilator when operating with option.

UV-SVN02C-EN 13

Dimensions and Weights

3"

4"

4"

1 3/4"

10 1/8"

6 1/2"

10 1/2"

32 1/2"

35 5/8"

11"

14 1/2"

16 5/8"

7 1/8"

7 7/8"

B17 1/8"

12 1/8"

13 1/2" 13 1/2"

4 7/8"

2 3/8"

2"-DIA K.O.
FOR PIPING

7/8"-DIA K.O.

FOR ELECTRICAL

17 1/8"

A

C

D

F.A. UPPER BACK

R.A. LOWER BACK

BACK VIEW SIDE VIEW

TOP VIEW

NOTE:

WHEN ELECTRIC HEAT IS PRESENT, ALL POWER
CONNECTIONS ARE MADE IN THE RIGHT HAND
END POCKET. ON ALL OTHER CONFIGURATIONS,
POWER CONNECTIONS ARE MADE IN THE LEFT
HAND END POCKET.

ISO VIEW

7/8" x 2" SLOTS
FOR HANGING BRACKETS

RIGHT HAND
END POCKET

LEFT HAND
END POCKET

DISCHARGE

Figure 4. Horizontal unit ventilator with ducted front discharge dimensional data; sizes 075–150 (dimensions in

inches)

Size A B C D

75 70-1/4 36 46 43-1/4
100 82-1/4 48 58 55-1/4
125 94-1/4 60 70 67-1/4
150 106-1/4 72 82 79-1/4

14 UV-SVN02C-EN

Dimensions and Weights

4"

5"

5"

2 3/4"

10 1/8"

7 1/2"

11 1/2"

39 1/2"

26 1/2"

43 1/8"

13 1/2"

15 1/2"

17 5/8"

6 1/8"

9 7/8"

72"17 1/8"

12 1/8"

13 1/2" 13 1/2"

4 7/8"

2 3/8"

2"-DIA K.O.
FOR PIPING

7/8"-DIA K.O.

FOR ELECTRICAL

17 1/8"

106 1/4"

82"

79 1/4"

F.A. UPPER BACK

R.A. LOWER BACK

BACK VIEW SIDE VIEW

TOP VIEW

ISO VIEW

7/8" x 2" SLOTS
FOR HANGING BRACKETS

RIGHT HAND
END POCKET

LEFT HAND
END POCKET

DISCHARGE

NOTE:

WHEN ELECTRIC HEAT IS PRESENT, ALL POWER
CONNECTIONS ARE MADE IN THE RIGHT HAND
END POCKET. ON ALL OTHER CONFIGURATIONS,
POWER CONNECTIONS ARE MADE IN THE LEFT
HAND END POCKET.

72"

Figure 5. Horizontal unit ventilator with ducted front discharge dimensional data; size 200 (dimensions in inches)

UV-SVN02C-EN 15

Dimensions and Weights

3"

6 1/2"

10 1/2"

14 1/2"

B

R.A. LOWER BACK

17 1/8"

4 7/8"

2 3/8"

2"-DIA K.O.
FOR PIPING

7/8"-DIA K.O.

FOR ELECTRICAL

17 1/8"

3/4"

7 1/4"

5 1/8"

4"

A

4"

16 5/8"

10 1/8"

32 3/4"

46"

48 3/4"

11"

12 1/8"

13 1/2" 13 1/2"

C

D

BACK VIEW SIDE VIEW

TOP VIEW

NOTE:

WHEN ELECTRIC HEAT IS PRESENT, ALL POWER
CONNECTIONS ARE MADE IN THE RIGHT HAND
END POCKET. ON ALL OTHER CONFIGURATIONS,
POWER CONNECTIONS ARE MADE IN THE LEFT
HAND END POCKET.

ISO VIEW

7/8" x 2" SLOTS
FOR HANGING BRACKETS

RIGHT HAND
END POCKET

LEFT HAND
END POCKET

BOTTOM DISCHARGE

B

Figure 6. Horizontal unit ventilator with double deflection discharge dimensional data; sizes 075–150 (dimensions in

inches)

Size A B C D

75 70-1/4 36 46 43-1/4
100 82-1/4 48 58 55-1/4
125 94-1/4 60 70 67-1/4
150 106-1/4 72 82 79-1/4

16 UV-SVN02C-EN

Dimensions and Weights

4"

7 1/2"

11 1/2"

15 1/2"

72"

R.A. LOWER BACK

17 1/8"

4 7/8"

2 3/8"

2"-DIA K.O.
FOR PIPING

7/8"-DIA K.O.

FOR ELECTRICAL

17 1/8"

3/4"

9 1/4"

5 1/8"

5"

106 1/4"

5"

17 5/8"

10 1/8"

26 1/2"

53 3/4"

57 1/4"

13 1/2"

12 1/8"

13 1/2" 13 1/2"

82"

79 1/4"

BACK VIEW SIDE VIEW

TOP VIEW

ISO VIEW

7/8" x 2" SLOTS
FOR HANGING BRACKETS

RIGHT HAND
END POCKET

LEFT HAND
END POCKET

NOTE:

WHEN ELECTRIC HEAT IS PRESENT, ALL POWER
CONNECTIONS ARE MADE IN THE RIGHT HAND
END POCKET. ON ALL OTHER CONFIGURATIONS,
POWER CONNECTIONS ARE MADE IN THE LEFT
HAND END POCKET.

BOTTOM DISCHARGE

Figure 7. Horizontal unit ventilator with double deflection discharge dimensional data; size 200 (dimensions in

inches)

UV-SVN02C-EN 17

Dimensions and Weights

Figure 8. Supply/return air arrangements for the horizontal unit ventilator

DIGIT 20 = A

FA DUCT TOP
w/RA DUCT LOWER BACK

DIGIT 20 = B

FA DUCT TOP
w/RA DUCT BOTTOM

DIGIT 20 = C & D

(C) FA DUCT TOP
w/RA BAR GRILLE BOTTOM

(D) FA DUCT TOP
w/RA OPEN BOTTOM

DIGIT 20 = E

DIGIT 20 = F

FA DUCT UPPER BACK
w/RA DUCT LOWER BACK

DIGIT 20 = G

FA DUCT UPPER BACK
w/RA DUCT BOTTOM

DIGIT 20 = H & J

(H) FA DUCT UPPER BACK
w/RA BAR GRILLE BOTTOM

(J) FA DUCT UPPER BACK
w/RA OPEN BOTTOM (no grille)

DIGIT 20 = K

DIGIT 20 = L

100% RA DUCT LOWER BACK

DIGIT 20 = M

100% RA DUCT BOTTOM

DIGIT 20 = N & P

(N) 100% RA BAR GRILL BOTTOM

(P) 100% RA OPEN BOTTOM
(no grille)

100% FA DUCT TOP

100% FA DUCT UPPER BACK

18 UV-SVN02C-EN

Receiving and Handling

The unit ventilator is packaged in clear stretch wrap and
protective cardboard.

Note: Before unwrapping, make a visual inspection of the

unit for any damage that may have occurred during
shipping. All orders are shipped FOB (Freight on
Board) from the factory, therefore any claims must
be made with the delivering carrier.

Figure 9. Horizontal unit ventilator as shipped

Following visual inspection, carefully begin the following
procedures:

1. Carefully remove the stretch wrap and the top
cardboard cover.

2. Remove remaining cardboard blocking.

3. Remove the bottom access panel with a 7/32-in. Allen

h.

wrenc

4. Verify nameplate sales order number is correct.

5. Remove shipping bracket from the lower rear corners
of the unit and shipping skid. Access to the screws
holding unit to the skid is obtained inside the unit.

Figure 10. Shipping skid removal

6. Rotate fan wheels manually. Wheels should move
freely and be in proper alignment. Visually inspect the
fan area for obstructions or shipping damage.

7. Remove all applicable knock-outs for coil piping and
electrical connections

Figure 7, p . 17).

UV-SVN02C-EN 19

(see Figure 5, p. 13 through

Pre-Installation

Jobsite Inspection

Always perform the following checks before accepting a
unit:

1. Verify that the nameplate data matches the data on the
sales order and bill of lading (including electrical data).

2. Verify that the power supply complies with the unit
nameplate specifications.

3. Visually inspect the exterior
shipping damage. Do not sign the bill of lading

accepting the unit(s) until inspection has been
completed. Check for damage promptly after the
unit(s) are unloaded. Once the bill of lading is signed at
the jobsite, the unit(s) are now the property of the
SOLD TO party and future freight claims MAY NOT be
accepted by the freight company.

Jobsite Storage

This unit is intended for indoor use only. To protect the unit
from damage due to the elements, and to prevent possible
IAQ contaminant sources from growing.

1. Place the unit(s) on a dry surface or raise above the
ground to assure adequate air circulation beneath the
unit.

2. Cover the unit(s) with a water proof tarp to protect

from the elements.

them

of the unit, for signs of

NOTICE:

Microbial Growth!

Wet interior unit insulation can become an
amplification site for microbial growth (mold), which
may cause odors and damage to the equipment and
building materials. If there is evidence of microbial
growth on the interior insulation, the insulation should
be removed and replaced prior to operating the system.

3. Make provisions for continuous venting of the covered
units to prevent moisture from standing on the unit(s)
surfaces.

4. Do not stack units.

20 UV-SVN02C-EN

Installation—Mechanical

Location Considerations

Selecting the appropriate location for installing a unit is
very important. The following factors should be
considered:

1. Ceiling hung design must be of sufficient structure to
support the weight of the unit (see Ta bl e 8 for weight
data). Figure 5, p. 13 through Figure 9, p. 17 show
hanging rod location and placement.

Note: Isolator and suspension rods are to be provided

by the installer. For hanging suspension, Trane
recommends 3/8-in. rods.

Ta b l e 8. Typical unit weights

Unit Size lb kg

075 340 154
100 375 170
120 435 197
150 500 227
200 600 272

(a) Weight at time of shipping. Subtract approximately 10% for actual

hanging weight.

2. Service access is gained through the access panels on
the bottom of the unit. Sufficient space should be
allowed for panel removal. If the hinged panel option
is ordered, allow for a swing radius of 14-in.

3. Sufficient free area around both the discharge and wall

ox should be maintained to ensure proper

b
ventilation. If any part of the discharge is blocked off,
unit performance may be affected. If the wall box is too
small on the inlet, water or debris could be pulled into
the unit (see Ta bl e 9) for minimum wall box free area
requirements).

Table 9. Wall box free area requirements

Unit Size Discharge (in2)Inlet (in

075 232 169
100 296 217
120 364 265
150 430 313
200 576 391

4. Use the shortest and most efficient ductwork possible
when ducting the discharge and/or return air grille.
Units ordered with a duct collar discharge
arrangement are equipped with a 1-in. duct flange.

Note: Ductwork

for ducted units will be provided by

the installer.

5. If installing a split system, refe
installation instructions provided with that unit for
special location considerations.

(a)

r to the condenser

2

)

Note: M

easurements in Figure 5, p. 13 through

Figure 9, p. 17 do not include adjusted leveling

legs. Adjustment of Leveling legs should be
done first. New measurements from the floor
should be retaken before installation.

Unit Mounting

The horizontal unit ventilator may be attached directly to
the ceiling or suspended from the ceiling by hangers.
Hanger rods should be at least 3/8 in. diameter steel to
support unit weight, as given in Table 8, p. 21.

WARNI NG

Heavy Objects!

Always lift unit with fork trucks or other special lifting
device following the recommended procedures. Failure
to properly lift the unit as instructed, could result in
death or serious injury.

Install the hanging devices before hoisting the unit. A fork
lift or other special lifting device is required to hoist the
unit into mounting position.

Protect the unit finish by covering the lifting platform.

To hoist the unit into place, follow the instructions below:

1. Secure 2 x 4s to the lift forks. These two supports must
be long enough and spaced properly on the forks to
support the unit while it is being lifted and clear the
duct flanges on the unit.

2. Tip the unit onto the supports and slide it toward the lift

til the unit weight balances.

un

3. Lift the unit. Once in position, temporarily secure the

nit to the hanger rods or mounting studs with nuts

u
and washers.

4. Align the unit with the du
alignment, tighten the mounting nuts securely.

5. Recheck the unit alignment and make sure the unit is

.

level

6. Replace all covers, panels and filters
the unit.

Note: Un

it must be mounted level. Coils and drain pans
inside unit are pitched properly for drainage before
shipment.

Horizontal Recessed Mounting

The recessing flange assembly ships in a box separate
from the unit. The assembly includes pre-cut flanges,
corner transition pieces, mounting screws, filler pieces,
and pressure sensitive gaskets. Refer to Figure 11 and

Figure 12, p. 22 for typical horizontal installation.

ct work. When in proper

before starting

UV-SVN02C-EN 21

Installation—Mechanical

Supply Air

G

Access Panel

Recessing Flange

Return Air
Inlet Grille

Supply Air
Grille

Access Panel

Recessing Flange

Return Air
Inlet Grille

Intake Panel

Bottom Front Panel

Discharge Panel

End Cover

Figure 11. Recess flange installation around horizontal

unit ventilator access panel and inlet

rille

Figure 12. Recess flange installation around bottom

and front of horizontal unit

1. Measure and cut the pressure sensitive gaskets to the
correct lengths and attach to the flanges.

2. Starting at a corner, attach the top flange with the
mounting screws provided.

3. Press the corner transition pieces

onto the end of the
flange and attach the adjoining flanges and filler
pieces at the bottom of the unit. Work around the unit
in this manner until all flanges and corners are
installed.

4. Mounting holes are pre-drilled in
assembled flanges as a template to drill all 7/32-in.
mounting holes in the cabinet.

5. Attach the flange section to

the flanges. Use the

the unit cabinet with the

mounting screws provided.

6. Open and remove the front access panel.

7. Tighten the mounting fastener
unit is level.

8. Open the unit access panel and remove the bottom
front panel

(see Figure 13, p. 22).

, making sure that the

Figure 13. Horizontal unit ventilator with front panel

removed

9. Hoist the unit onto a forklift and mount in place as
described in “Unit Mounting,” p. 21, ensuring the unit
is secured and aligned in place, and that the mounting

are tightly fastened.

nuts

Note: Un

it must be mounted level. Coils and drain
pans inside the unit are pitched internally for
proper drainage.

10. Replace all covers, panels and filters before starting the
it.

un

22 UV-SVN02C-EN

Installation—Piping

13-5/8"

3"

Horizontal Unit

Note: Before installation of piping package, the shipping

bracket holding the piping in place, must be
removed.

Proper installation of piping is necessary to provide
efficient coil operation and to prevent damage during
operation. Follow standard piping practices and include all
accessories as necessary.

Piping connection knockouts are shown in Figure 5, p. 13
through Figure 9, p. 17. Field connection types and sizes
for units without piping packages are listed in Tab l e 10 ,

p. 23.

Table 10. Coil data for field piping

Coil Type Connection Location Field Connection Size

4-pipe chilled water /
hot water

2-pipe changeover coil Left or right 7/8 in. OD
Hot water only Left or right 7/8 in. OD
Steam Left or right 1 in. MPT
Chilled water / electric

heat
Chilled water / steam Left or right 7/8 in. OD / 1 in. MPT
DX Left 7/8 in. suction, 3/8 in.
DX / hot water Left cooling / right

DX / steam Left cooling / right

DX / electric heat Left cooling / right

Left or right (opposite
ends)

Left cooling 7/8 in. OD

heating

heating

heating

7/8 in. OD / 5/8 in. OD

7/8 in. suction,
3/8 in. / 5/8 in. OD

7/8 in. suction,
3/8 in. / 1 in. MPT

7/8 in. suction,
3/8 in. / NA

Trane Piping Packages (Option)

Trane Standard Piping Package includes a two- or three­way valve with bypass balance valve, ball valves, Pete’s
plugs, and unions. A strainer and circuit balancing valve
are optional.

All union connections should be tightened in the field.
Units are shipped with union connections hand-tightened
only in the factory.

Notes:

• All connections made in the field should be sweat

connections.

• Piping packages are not shipped insulated. Any

insulation should be provided in the field by the
installing contractor.

Split System Units

The following refrigerant piping and interconnecting
wiring instructions apply to unit ventilators with direct
expansion type cooling coils used in conjunction with air­cooled condensing units. Reference must also be made to
the condensing unit installation and wiring manuals which
are shipped with the condensing unit.

Note: A UL listing mark applied to a unit ventilator does

not apply to any associated refrigerant condensing
unit.

Refrigerant Piping

A 3/4-in. OD condensate drain connection is provided on
the chilled water supply end of the unit. Attach a flexible
condensate drain hose over the drain pan connection and
secure with a hose clamp.

Figure 14. Condensate drain pan location

Hazard of Explosion and Deadly Gases!

Never solder, braze or weld on refrigerant lines or any
unit components that are above atmospheric pressure
or where refrigerant may be present. Always remove

WARNING

refrigerant by following the guidelines established by
the EPA Federal Clean Air Act or other state or local
codes as appropriate. After refrigerant removal, use dry
nitrogen to bring system back to atmospheric pressure
before opening system for repairs. Mixtures of
refrigerants and air under pressure may become
combustible in the presence of an ignition source
leading to an explosion. Excessive heat from soldering,
brazing or welding with refrigerant vapors present can
form highly toxic gases and extremely corrosive acids.

The drain pan on the horizontal unit is internally pitched.
To field reverse, remove the screws and drain pan, rotate

Failure to follow all proper safe refrigerant handling
practices could result in death or serious injury.

the pan and reinstall.

After the condensate drain piping has been completed,
check water flow to be sure the system properly carries and
away all condensate accumulation.

A P-trap is recommended for installations that drain
directly into a sewer system. A P-trap is not necessary for
operation but will eliminate sewer gas odor.

Unit ventilators with direct expansion cooling are
dehydrated and shipped with a dry air holding charge.
Connections are “pinched off” at the factory.

To connect the condensing unit lines, cut off the stubouts
and swage. The condensing unit lines can then be brought
into the swage and brazed. Trane recommends the use of
nitrogen purge when brazing refrigerant lines to prevent
formation of oxides in the lines.

UV-SVN02C-EN 23

Installation—Piping

Vacuum Equalizer

H= 12"
minimum

F&T Trap

See text for sizing

Gravity flow to

vented receiver

Coil

To Condensate

return

Temp. Regulating Valve

Install the refrigerant suction and liquid lines as described
in the condensing unit installation instructions. The
thermal expansion valve (TXV) is factory-installed on the
Unit Ventilator.

Note: The R-410A direct expansion (DX) refrigerant coil

includes a factory-mounted adjustable thermal
expansion valve (TXV) set to 90 psig superheat and
an equalizing tube.

Piping should be run straight out through the back of the
unit. Access piping knockouts are located in the rear
panels of the unit, as shown in Figure 5, p. 13 through

Figure 9, p. 17.

Recommended refrigerant line connections for various
unit combinations are given in Table 9, p. 21. Typical
Superheat Charging Charts are shown in the Trane Service
Facts found in the condensing unit section manual.
Refrigerant charge weights can also be determined with
your local Trane account manager using a valid Trane
Selection Program.

Steam Piping

When air, water or another product is heated, the
temperature or heat transfer rate can be regulated by a
modulating steam pressure control valve. Since pressure
and temperature do not vary at the same rate as load, the
steam trap capacity, which is determined by the pressure
differential between the trap inlet and outlet, may be
adequate at full load, but not some lesser load.

There are detailed methods for determining condensate
load under various operating conditions. However, in
most cases this is not necessary if the coils are piped as
shown in Figure 15. Follow the procedure documented in
the ASHRAE Systems Handbook, Steam Systems.

actuator 45° counter-clockwise (see Figure 16). The two­way valves are bi-directional flow. The three-way valves
can be mixing or diverting (see Figure 17).

Note: The actuator must be removed if soldering is being

conducted near the valve. High heat may cause
damage to the actuator’s plastic body/
mechanisms.

On applications without factory-installed piping packages
(option), it is important to remove the cartridge assembly
from the valve body with the provided tool (see Figure 18,

p. 25).

Figure 16. Remove modulating valve actuator by

pressing in tab (inset) and turning actuator
45° clockwise

Figure 15. Steam piping

Modulating Water Valves (Option)

The actuator on the valve is a 24 V, three-point floating
valve. The actuator can be easily removed from the valve
body by pressing in on the locking tab and rotating the

24 UV-SVN02C-EN

Installation—Piping

Two-way valve

AB<->B

AB

B

AB<->A

A

AB

Three-way valve

Figure 17. Steam piping: two-way valve (top) and three-

way valve (bottom)

Closed

B

A

Open

A

B

Figure 18. Cartridge removal tool

Use the following steps to complete cartridge assembly
removal:

1. Remove valve actuator.

2. Remove the cartridge assembly from the valve body

with the enclosed tool.

3. Solder the valve in accordance with normal soldering

practices.

4. Re-install the cartridge after soldering by tightening
til it bottoms out. The top surface of the cartridge

un
will be flush with the top edge of the body casting.

Note: D

5. Replace valve actuator and wire in accordance with

instructions

o not over-tighten. Maximum torque is 40

in·lb.

.

UV-SVN02C-EN 25

Plumbing

The valve may be plumbed in any angle but preferably not
with the actuator below horizontal level of the body. Make
sure there is enough room around the actuator for
servicing or replacement.

For use in diverting applications, the valve is installed with
the flow water entering through the bottom AB port and
diverting through end ports A or B. In mixing applications
the valve is installed with inlet to A or B and outlet through
AB.

Mount directly to the tube or pipe. Do not grip the actuator
while making or tightening plumbing connections. Either
hold valve body by hand or attach an adjustable spanner
(38 mm/1-1/2”) across the hexagonal or flat faces on the
valve body (see Figure 19, p. 26).

Installation—Piping

Figure 19. Proper plumbing technique for modulating

valves

Manual Opener

The manual opener can be manipulated only when in the
up position. The A port can be manually opened by firmly
pushing the white manual lever down to the midway
position and pushing the lever in. In this position, both A
and B ports are open. This “manual open” position may be
used for filling, venting and draining the system or
opening the valve during power failure.

The valve can be closed by depressing the white lever
lightly and then pulling the lever outward. The valve and
actuator will return to the automatic position when power
is restored.

Note: If the valve is powered open, it cannot be manually

closed, unless the actuator is removed.

Figure 20. Proper mounting for isolation valves

Servicing/Removal of Valves

The actuator can be removed from the valve body.
Removing the actuator is recommended of soldering is
being conducted near the valve.

To remove the actuator:

1. Place the manual operating lever in the Open position

(see Figure 21, p. 26).

Figure 21. Removing isolation valve actuator

Typical floating controller is an SPDT controller with a
center-off position. On a change in temperature from the
set point, the controller will close the NO or NC contacts,
driving the valve to an intermediate position until a further
change at the controller.

The valve is set between the limits of the controller to
satisfy various load requirements. In the event of power
failure, the valve will stay in the position it was in before
loss of power. When power is restored, the valve will again
respond to controller demand.

Isolation Valves

Installation

The valve can be mounted in any position on a vertical line.
If the valve is mounted horizontally, the actuator must be
even with or above the center line. Make sure there is
enough room to remove actuator cover for servicing.
Mount the valve on the tube or pipe.

Note: Make sure the flow through the valve is in the

direction indicated by the arrow stamped on the
valve body.

2. Depress the locking button and lift actuator until it

separates from the valve body.

To install the actuator to the valve body:

1. Align the slot on the shaft of the valve with the valve

body notch on side of body (see Figure 22, p. 27).

26 UV-SVN02C-EN

Installation—Piping

Figure 22. Installing isolation valve actuator

2. Install body valve into pipe.

3. Wiring connections may be made either before or after
tor installed on body.

actua

4. Place the manual operating leve

OPEN position.

5. Align actuator coupling to slot on the shaf

body and fit the head onto the valve body to ensure the
shaft seats correctly (see Figure 22).

6. Press the actuator and valve body until it secures

together

Soldering procedures are as follows:

. Remove actuator as stated earlier.

1

2. Place valves on the pipe. Rotate valve stem so the shaf

slot points at the notch in the side of the body (90O to
flow direction). This protects the plug inside the valve
by removing it from the seat (see Figure 23).

.

r on the actuator in the

t of the valve

Heating Coils with Direct Expansion Cooling

Heating options for direct expansion cooling in the unit
ventilator are hot water, steam or electric heat.

These coils facilitate direct expansion cooling with
standard capacities. The supply and return connections
are located in the right hand end pocket. Hot water field
connections are made with a 5/8 in.\[15.9\] OD male
sweated joint, while steam coils have a 1 in.\[25.4\] male
pipe thread (MPT) connection (see Tab l e 10 , p . 2 3 ).

Electric heat coils provide a third way to supply heating to
the direct expansion cooling. The coil utilizes three to six
preheat elements which are factory-wired.

t

Figure 23. Preparation for soldering

3. Sweat the joints, keeping outer surface free from

solder.

Note: Do not use silver solder due to high

temperature requirements.

UV-SVN02C-EN 27

Installation—Sensors

X13790822-04 (wall)
X13790855-01 (unit)

X13790492-01 (wall)
X13790855-01 (unit)

X13790842-01 (wall)
X13651467-02 (comm)

X13790843-01 (unit)

X13511527-01 (wall)
X13790849-01 (unit)
X13651467-02 (comm)

X13511529-01 (wall)
X13790849-01 (unit)
X13651467-02 (comm)

Control Options

Figure 24. Wireless temp sensor with display

(SP, OALH, COMM)
Digit 19 = 3

Figure 25. Wireless temp sensor

(SP, OALMH, COMM)
Digit 19 = 4

Figure 27. Unit mtd temp sensor

(SP, OALH, COMM)
Digit 19 = L

Figure 28. Split mtd zone sensor, unit mtd fan speed

switch, and wall mtd setpoint dial
with On/Cancel
Digit 19 = P

Figure 29. Split mtd zone sensor,

unit mtd fan speed switch, and
wall mtd setpoint dial

Figure 26. Wall mtd temp sensor

(SP, OCC/UNOCC, OA, LMH, COMM)
Digit 19 = J

28 UV-SVN02C-EN

Digit 19 = Q

Installation—Sensors

X13790841-01 (wall)
X13651467-02 (comm)

X13790886-04 (wall)
X13651467-02 (comm)

1

2

3

4

5

6

7

8

9

0

-

=

Figure 30. Wall mtd temp sensor

(SP, OALMH, COMM)
Digit 19 = K

Figure 31. Wall mtd display temp sensor

(SP, OCC/UNOCC, OALMH, COMM)
Digit 19 = M

Figure 32. Wall-mounted wired and wireless zone

sensor dimensions

Installing Wall-Mounted Wired Sensors

Reference the wall-mounted zone sensor dimensions in

Figure 32, p. 29. Position the sensor on an inside wall three

to five feet above the floor and at least 18 inches from the
nearest outside wall. Installing the sensor at a lower height
may give the advantage of monitoring the temperature
closer to the zone, but it also exposes the sensor to airflow
obstructions. Ensure that air flows freely over the sensor.

1. 0.31 in

2. TYP R.07 in (R1.9)

3. TYP 0.24 in)

4. 2.9 in

5. 1.08 in

6. 0.12 in

7. 3.39 in

8. 4.68 in

9. 2.48 in

10. 0.6 3 i n

11. 1.45 in

12. 2.62 in

Sensor

When selecting a sensor location, avoid the following:

• Areas of direct sunlight

• Areas in the direct airstream of air diffusers

• Exterior walls and other walls that have a
differential between the two sides

• Areas that are close to heat sources
appliances, concealed pipes, chimneys, or other heat­generating equipment

• Drafty areas

• Dead spots behind doors, projection screens, or

s

corner

• Walls that are subject to high vibration

• Areas with high humidity

• High traffic areas (to reduce acci
tampering)

dental damage or

temperature

such as sunlight,

UV-SVN02C-EN 29

Installation—Sensors

• Metal barriers between the receiver and the sensor (for
example, plastered walls with metal lathe or metal roof
decks)

• Thick, solid concrete walls between the receiver and
the sensor

• Placing the sensor inside metal enclosures

Height Requirements

It is recommended that you mount the back plate a
maximum distance of 54 inches above the floor. If a
parallel approach by a person in a wheelchair is required,
reduce the maximum height to 48 inches.

Note: Consult section 4.27.3 of the 2002 ADA (Americans

with Disability Act) guideline, and local building
codes, for further details regarding wheelchair
requirements.

Mounting Surfaces

Using the hardware provided, mount the back plate of the
sensor to a flat surface such as sheetrock or plaster, or an
electrical junction box. The sensor must be mounted
plumb for accurate temperature control and to ensure
proper air movement through the sensor.

• If mounting onto sheetrock or plaster
threaded anchors (pre-drilling holes is not usually
necessary) and the two M3.5 x 20 mm mounting
screws.

• For mounting onto an electrical junction box, use the
two 6-32 x 3/4 in. screws.

Before beginning installation, consider the location

nsiderations below. Also, refer to the unit wiring

co
schematic for specific wiring details and point
connections.

, use the plastic

Location Considerations

Avoid mounting the sensor in an area subject to the
following conditions:

• Dead spots, such as behind do
not allow free air circulation.

• Air drafts from stairwells, outside doors, or

sectioned hollow walls.

un

• Radiant heat from the sun, fireplaces, appliances, etc.

• Airflow from adjacent z

• Unheated or uncooled spaces behind the controller,

ch as outside walls or unoccupied spaces.

su

• Concealed pipes, air ducts, or chimneys in partition

aces behind the controller.

sp

ors or in corners that do

ones or other units.

Location Considerations for Wireless Zone Sensors

Placement of the sensor is critical to proper operation (the
receiver is factory mounted on fan-coil units). For most
installations, barriers limit proper radio signal strength
more than distance. For best radio transmission range and

reliability, mount the receiver and sensor in line of sight.
Where this is not possible, try to minimize the number of
barriers between the pair of devices. In general, sheetrock
walls and ceiling tiles offer little restriction to the
transmission range for the sensor is as follows:

• Open range: 2,500 ft (packet error rate = 2%)

• Usable range: 200 ft

• Typical range: 75 ft

Fan Mode Switch Installation

The fan mode switch ships loose inside the unit accessory
bag. Follow the steps below to install the fan mode switch.

Items needed:

2 x 4 electrical junction box

1. Remove the brown wire if not using a field-supplied
damper.

2. Remove the terminals, cut and strip wires as required

r installation.

fo

3. Level and position a 2 x 4 electrical

4. Follow the instructions given in “Wall-Mounted

Control Interconnection Wiring,” p. 41 and route the

wires as shown in the wiring diagram. R
typical wiring diagram or to the unit specific diagram
on the unit.

5. Position the fan mode switch over the junction box
with the two screws supplied.

junction box.

efer to the

Zone Sensor Installation

Follow the procedure below to install the wired zone
sensor module.

1. Note the position of the setpoint adjustment knob and
gently pry the adjustment knob from the cover using
the blade of a small screwdriver.

2. Insert the screwdriver blade behi
of the module and carefully pry the cover away from
the base.

3. To mount the sensor back plate:

a. Hold the back plate against the mounting surface

and ma

b. Secure the back plate against the mounting surface

using included hardware.

4. To install the zone sensor module to a standard

nction box:

ju

a. Level and install a 2 x 4-in.

supplied) vertically on the wall.

b. Pull the control wires through the cutout. Attach the

module to the wall using the screws provided.

5. Strip the insulation on the i

0.25-inch and connect to TB1 (for wired sensors).

6. Screw down the terminal blocks (for wired sensors).

7. To replace the cover:

rk the screw locations.

nd the cover at the top

junction box (installer

nterconnection wires back

30 UV-SVN02C-EN