TRANE TCD, TCH, TFD, TFH, YCD Installation Instructions

...

Page 1

Installation Instructions

Voyager Light Commercial Constant Volume to Single Zone Variable Air Volume or Multispeed Conversion

Models:

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.

June 2020

TCD, TCH, TFD, TFH, YCD, YCH, YFD, YFH, TSD, TSH, THD, THH, YSD, YSH, YHD, YHH

SAFETY WARNING

PART-SVN227B-EN

Page 2

Introduction

Read this manual thoroughly before operating or servicing 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

WARNING

CAUTION

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 handli ng 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.

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

Personal Protective Equipment (PPE) Required!

Failure to wear proper PPE for the job being undertaken could result in death or serious injury. Technicians, in order to protect themselves from potential electrical, mechanical, and chemical hazards, MUST follow precautions in this manual and on the tags, stickers, and labels, as well as the instructions below:

• Before installing/servicing this unit, technicians MU

ST put on 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 Safety Data Sheets (SDS) and OSHA guidelines for proper PPE.

• When working with or around hazardous chemicals, ALWAYS (Global Harmonized System of Classification and Labeling 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, 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.

all PPE required for the work being

refer to the appropriate SDS and OSHA/GHS

Page 3

WARNING

Hazardous Voltage and Gas!

Failure to turn off gas or disconnect power before servicing could result in an explosion or electrocution which could result in death or serious injury. Turn off the gas supply and disconnect all electric power, including remote disconnects, before servicing the unit. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized.

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

All trademarks referenced in this document are the trademarks of their respective owners.

Introduction

Revision History

PART-SVN227A-EN (17 Sep 2015):

First version of this literature

PART-SVN227B-EN 3

Page 4

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Warnings, Cautions, and Notices . . . . . . . . 2

Important Environmental Concerns . . . . . 2

Important Responsible Refrigerant Practices 2

General Information . . . . . . . . . . . . . . . . . . . . . 5

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Tool List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Part Identification . . . . . . . . . . . . . . . . . . . . . . 5

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Inverter Duty Motor and Vibration Reduction Bracket

Discharge Air Sensor . . . . . . . . . . . . . . . . . . . 8

VFD Assembly Mounting . . . . . . . . . . . . . . . 8

Control Panel Components . . . . . . . . . . . . . 9

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Control Panel to Drive Connections . . . . . 11

Motor and Drive . . . . . . . . . . . . . . . . . . . . . . 11

Control Panel . . . . . . . . . . . . . . . . . . . . . . . . 12

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . 13

Setting Economizer Damper Positions . . . 13

Zone Sensor . . . . . . . . . . . . . . . . . . . . . . . . . 13

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Motor to Drive . . . . . . . . . . . . . . . . . . . . . 11

4 PART-SVN227B-EN

Page 5

General Information

Introduction

The information provided in this manual is intended for use when converting a Voyager™ Light Commercial rooftop unit, shipped from the factory with ReliaTel™ controls, from constant volume supply air to single zone variable air volume or a multispeed (Title 24) supply fan. The work involved in the upgrade consists of replacing the existing supply fan motor with an inverter duty motor, adding a TR200 variable frequency drive and various control panel changes and wiring adaptations.

re referred to at

In this manual other pieces of litera various points. The literature referred to is not included in the upgrade package unless noted and is available for download in e-Library.

If technical assistance is nee process, contact Light Commercial Technical Service in Clarksville. If the installation is not being performed by a Trane/American Standard service technician, please contact your national account executive for assistance.

ture a

ded du

ring the installation

Part Identification

Important: Verify all parts before unit disassembly.

Table 1. VFD assembly and motors included in k

its

Tool List

• Cordless Drill

– Phillips driver bit (#2/Standard)

– 3/8-in. hex nut driver bit

• Socket Wrench

– 3/8-in. and 1/2-in. sockets

• Phillips and flat head screwdrivers

• Needle nose pliers

• Fish Tape or Rod

• Electrical tape

• Medium Crescent wrench or standard combination wrenches

•Flashlight

• Sharpie/Magic Marker

Part Number Quantity Factory Number Kit

VFD Assembly DRV01841 1 438570930300 Motor MOT14568 1 X70371159010 VFD Assembly DRV01842 1 438570930400 Motor MOT14568 1 X70371159010 VFD Assembly DRV01844 1 438570930100 Motor MOT14568 1 X70371159010 VFD Assembly DRV01845 1 438570930200 Motor MOT14569 1 X70371160010

KIT17846

KIT17847

KIT17848

KIT17849

PART-SVN227B-EN 5

Page 6

General Information

Table 2. Common parts included in kits

Common Parts

RTOM to Com Wire WIR04125 1 X19051428010 Relay RLY02138 1 X13300552020 Terminal Block BLK01437 1 X13491348010 Terminal Strip BLK01438 1 X13491349010 Multispeed Harness WIR07166 1 507113970100 Fully Modulating (SZVAV) Harness WIR07167 1 507113870100 Motor to Drive Harness WIR06995 1 X19052292010 Discharge Air Sensing Kit KIT08676 1 BAYTUBE008AA Vibration Bracket BRK04367 1 438572550100 RTRM MOD02665 1 X13650867170 RTOM MOD02554 1 X13650868090 Grounding Ring BAYSHGR001AA 1 N/A Terminal Block Screw SCR01871 1 X25330033210 Relay and Strip Screw SCR00909 8 X25330033130 Vibration Bracket and Drive Screws X25240209030 10 N/A Vibration Bracket Nut NUT00963 1 X28022600000 Drill Bit TOL03949 1 0308396 Vibration Bracket Washer WAS00720 6 X22050242010 Hole Location Template 50711426 1 N/A Installation Literature PART-SVN227A-EN 1 N/A Wiring Diagrams 018600350100 1 N/A RTEM MOD02618 1 X13651513030

(a)Each kit (KIT17846, KIT17847, KIT17848, and KIT17849) comes with the common parts listed in this

table (Table 2), along with the VFD assembly and motor listed in Table 1, p. 5.

(a)

Number Quantity Factory Number

6 PART-SVN227B-EN

Page 7

Installation

Voltage Plug

Reuse wire collar from motor that was removed

Remove

Inverter Duty Motor and Vibration Reduction Bracket

WARNING

Hazardous Voltage!

Failure to disconnect power before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized.

1. Remove the supply fan drive belt.

2. Unbolt and remove the existing motor. Remove the sheave from the motor shaft.

drive

Note: As the dr

ive sheav replace due to wear and a different sheave is not needed when upgrading to SZVAV or Multispeed, a new sheave is not included as part of the upgrade program. Sheaves are available through Trane Supply or your Trane or American Standard parts distributor.

3. Affix the sheave to the shaft A new shaft key is provided with the inverter duty motor.

4. A new wiring harness to connect the motor to the VFD is provided and will need The gauge of the wire in the motor to drive harness might be smaller than the wires that the existing motor was using, this is in line with the current production design.

Note: The m

otors used in the upgrade are dual voltage. If the unit that is being upgraded is not 460V the voltage plug on the back of the motor will need to be taken out, rotated 180° and reinserted.

Figure 1. Inverter duty motor

e is a common component to

of the inverter duty motor.

to be connected to the motor.

motor, follow a, b, and c below to install the grounding ring.

a. Remove the two screws from th

e back of the motor

as shown in Figure 2.

Figure 2. Back side of inverter duty motor

b. Slide the grounding ring over the end of the shaft

d ali

gn the holes in the ring with the holes that the

an screws were in.

c. Using the screws and washers provided wi

th the

grounding ring secure the ring to the motor.

6. Install the inverter duty motor into

the unit.

7. Determine the location of the holes used to hold the vibration bracket onto the motor mounting panel.

a. Dry fit the bracket according to Figure 3.

b. Use a marker to mark the lo

cation to

drill the holes for the screws that will hold the bracket to the motor mounting panel.

8. Drill the holes that were marked

using the 1/

8 inch drill

bit provided.

9. Install the vibration dampening bracket. See Fi

gure 3

for details.

Table 3.

Balloon Part

1 Inverter Duty Motor 2 Vibration Reduction Bracket 3 Screw, 1/4-14 X 0.625 (X25240209030)

(a)

(b)

5. For additional motor bearing protection, a motor shaft grounding ring is provided. Before installing the

PART-SVN227B-EN 7

(a) The torque applied to the nuts on the end of the extended bolts is to

(b)Use 1 washer on each bolt for 3 and 5 HP motors.

6 Nut (attached by motor supplier)

be as follows: 18–25 in·lb (~2 ft·lb) for 3 and 5 HP motors

Nut, 10-32 Hex Lock (X28022600000) Washer, 0.328 ID X 2.00 OD (X22050242010)

Page 8

Installation

Orient template as shown.

Marks for holes on left side should be fully into slots for holes drilled on the right side to line up correctly.

Figure 3. Vibration bracket installation

Figure 4. 3 or 5 HP vibration bracket installed

seen in Figure 6. In order to mount the assem in

ch holes will need to be drilled.

1. Use the paper template provid of the four holes to be drilled. Note the location of the temperature sensor for some gas heat units as the wiring will need to reach around the drive assembly after it is installed.

Figure 5.

ed to

bly four 1/8th

mark the locations

Discharge Air Sensor

For multispeed or single zone VAV operation a discharge air sensor is required. A discharge air sensing kit ships with each upgrade kit. Literature RT-SVN02*-EN ships along with the discharge air sensor parts kit and should be referenced for installation of the sensor. If a discharge air sensor is already installed it does not need to be replaced.

VFD Assembly Mounting

Hazardous Voltage!

WARNING

2. After locating and drilling the four holes, screw in two of the sheet metal screws a small gap still remains between the bottom of the screw head and the sheet metal wall.

3. Slide the left side of the drive assembly for m

ounting instead of holes on to the screws that are part way screwed in. Holding the drive in place, screw the two screws on the left side the rest of the way down.

4. Screw in the two screws on the assembly.

Figure 6. Field installed VFD assembly

in the left two holes so that

that has slots

right side of the drive

The VFD assembly is to be mounted on the interior wall in the supply fan section using four sheet metal screws as

8 PART-SVN227B-EN

Page 9

Installation

Figure 7. Factory installed VFD assembly

Control Panel Components

WARNING

Hazardous Voltage!

1. Remove and replace the existing RTRM module with the new RTRM module provided. Reconnect all plugs/ wires that were removed from the existing module to the new module. Refer to the Control Box Connections diagram when connecting plugs to the module.

2. Remove and replace (or add) the RTOM the new RTOM module provided. Reconnect all plugs/ wires that were removed from the existing module to the new module. Refer to the Control Box Connections diagram when connecting plugs to the module.

3. Communications module location is highlighted in the

cture below. It is not necessary to add or replace the

pi communications module for the upgrade, it will be referred to in terms of locating the new ground terminal and relay(s).

4. Remove and replace the supply fan motor contactor with the terminal block (HTB3 most likely not be two existing holes that will line up with the mounting holes of the terminal block. Use an existing hole and then using a 1/8-in. drill bit drill a hole to provide a location for the second screw. Reconnect wires 1A, 2A, 8A and 9A after the terminal block has been secured to the back panel. (1A to L1, 2A to L2, 8A to T1, 9A to T2)

5. *Install the terminal st

6. *Install the relay(s) (VRR, VRS) provided. (For Multispeed operation both r SZVAV only one relay is needed (VRR).)

7. Replace the Economizer Module (RTEM) if the unit is

uipped

eq Module is located behind the small access panel on the outside of the economizer hood.

*Note:I

with an economizer. The Economizer

n units built before single zone VAV or multispeed was available VRR and VRS will need to be drilled using a 1/8-in. drill bit. Positioning should be to the right of the communications module as seen in Figure 10. If the area to th not available then use the area to the left of the communications module.

e right of the communications module is

rip (GTB

from the factory, holes for the GTB,

) prov

) provided.

elays are needed, for

module with

ided. There will

Figure 8. Control panel installation

PART-SVN227B-EN 9

Page 10

Installation

GTB

VRR

Figure 9. Terminal block install

ation

Figure 10. Field installed terminal strip and relay

(SZVAV)

Table 4. Multispeed upgrade wires

Terminal Wire Number Terminal Usage

VRR-3 36CC GTB All VSR-3 36CD GTB

RTRMP1-2 36CF GTB All

PPF7-3 36CG GTB

GV PPF10-2 36CK GTB Gas Heat

PPF27-1 600B VRR-2 All PPF27-2 601B VRR-4 All PPF27-3 603B VSR-5 All PPF27-4 604B VSR-6 All PPF27-4 604E RESISTOR All

PPF27-6 607C RESISTOR All RTRM P2-5 608A VSR-1 All RTRM P9-1 609A RTRM P9-2

PHM Y-OUT W38 RTRM P1-12 All COMM PPF5-5 W63 RTOM PPF8-1 All COMM PPF5-4 W64 RTOM PPF8-2 All COMM PPF5-2 W65 RTOM PPF8-3 All COMM PPF5-1 W66 RTOM PPF8-4 All

Note: -GTB = New terminal strip installed next to communications module

-VRR = New relay

-VSR = New relay (Multispeed Only)

All

Electric Heat

All

Note: For multispeed conversion the second relay (VSR)

would be installed to the right of the VRR pictured.

Wiring

The tables below contain the connection information for the control panel wires that ship with the upgrade package based on the type of upgrade being performed. Directions and diagrams in the sections to follow will detail the connections to be made.

Table 5. New wiring for SZVAV upgrade

Terminal Wire Number Terminal Usage

VRR-3 36CC GTB All

RTOM P12-2 36CE GTB

GV 36CK GTB Gas Heat

PPF7-3 36CG GTB PPF27-1 600B VRR-2 All PPF27-2 601B VRR-4 All PPF27-5 604D RTOM P11-2 All PPF27-6 607B RTOM P11-1 All

COMM PPF5-5 W63 RTOM PPF8-1 All COMM PPF5-4 W64 RTOM PPF8-2 All COMM PPF5-2 W65 RTOM PPF8-3 All COMM PPF5-1 W66 RTOM PPF8-4 All

Note: -GTB = New terminal strip installed next to communications module

-VRR = New relay

-VSR = New relay (Multispeed Only)

All

Electric Heat

10 PART-SVN227B-EN

Page 11

Installation

Chase to Control Panel

Removed Screw

FTB

FU18 FU17 FU16

Wires to run back to the control panel

PPF27/ PPM27

Control Panel to Drive Connections

WARNING

Hazardous Voltage!

1. Take the nine pin connector (PPF27) that the signal control wires (600B, 601B etc.) are plugged into and using steel fish tape/stick run the opposite end of that wire harness through the wire chase that runs between the indoor fan section and upper left hand corner of the control panel.

2. Plug PPF27 into PPM27.

3. Remove the screw that holds closed in order to make the power connection of wires 3A, 8A, and 9A to FTB. After the connections have been made close the fusholder cover and re-secure it with the screw that was removed.

the fuseholder cover

Figure 12. Control panel to drive schematic

Figure 11. Control panel to drive connections

Motor and Drive

Motor to Drive

WARNING

Proper Field Wiring and Grounding Required!

For 3 and 5 hp motors a separate harness containing wires 505B, 504B and 503B is used to connect the inverter duty motor to terminal FTB2. After connecting the power wires, connect the ground wire (506A) from the motor to the ground screw on the bottom of the drive assembly.

PART-SVN227B-EN 11

Page 12

Installation

GND

FTB2

Figure 13. Motor to drive connections

Figure 14. Motor to drive schematic

Control Panel

WARNING

Hazardous Voltage!

Figure 15. GTB, VRR, and VSR wire connections

1. Connect the ends of the 600B and 601B to VRR terminals 2 and 4 as shown in Figure 15, p. 12.

a. For multispeed applications conne

and 604B to VSR

terminals 5 and 6 as shown in

ct wires 603B

Figure 15, p. 12.

b. For SZVAV conversions, connect pl

ug P11 (wires 604D and 607B) to the J11 pins on the RTOM module.

2. Connect the end of wire 64A that was connected to the supply fan

motor contactor to VRR-1 along with w

ire 64B. (Wire 64B only applies to electric heat/cooling only units.)

3. Remove wire 36W (one end is curr TNS1); it is re

placed by 36CC which is included with the

ently connected to

wiring kit. Connect one end of wire 36CC to VRR terminal 3 and the other end to the GTB.

or Multispeed conversions, take wire 36CD (suppli

4. F

ed in wiring kit) and connect one end to terminal 3 of the VSR and the other end to the GTB. Also, for Multispeed conversions connect the pl

ug that jumps RTRM P9-1 to RTRM P9-2 to the RTRM board as shown in connection diagram 01860036.

or Multispeed conversions, connect wire 608A to

5. F terminal 1

of the VSR. Land the other end of the 608A on plug P2, hole 5. P2 connects to the RTRM module at J2. To attach wire 608A to pl

ug P2, slide the press fitting

into hole 5 of P2. This connection is shown on diagram

01860036. Use this diagram to find the correct hole location on fitting P2.

6. For SZVAV conversions take the end of wire 36CE that has th

e 7 pin

plug and connect it to the RTOM J12

location and plug the other end on to the GTB.

7. For gas heat units connect the end of wire 36AS that

connected to th

was

e supply fan contactor to the GTB. For electric heat units connect the end of wire 36C that was connected to the supply fan contactor to the GTB.

8. Connect Wire 36A to the GTB. In production ult

ispeed/SZVAV units this wire is labeled as 36CF as

M seen in Table 5, p. 10.

Note: Wire 36CF is i

ncluded in the wiring kit as a substitute for wire 36A however, replacement is not necessary.

Table 6. Wire number differences

Wire Number Changes, Multispeed/SZVAV vs Constant Volume

Multispeed/SZVAV Constant Volume Notes

36CC 36W

12 PART-SVN227B-EN

36CF 36A

36CG 36C

36CK 36AS

Wire 36CC is included

ing package

in wir

Wire 36CG is used

with elec

Wire 36CK is used

with ga

tric heat

s heat

Page 13

Installation

9. The wire harness for W63 through W66 is included with the wiring kit along with the gender change wire for units where an RTOM module was previously not installed. Check the original Control Box Connections diagram for how to use the gender change wire along with the W63 through W66 harness to make the connection from the RTOM J11 to Communications J2 pins. If the unit already had an RTOM and Communications Module these wires will not be needed.

Wiring Diagrams

Kit 018600350100 contains the wiring diagrams seen in

Table 7. The electrical and connection schematic diagrams

are common for all units but the electrical control and power diagrams will need to be selected based on the unit voltage and the type of heat that the unit has. Control electrical, power electrical and schematic electrical diagrams can be stuck over the existing electrical diagrams on the inside of the control panel cover however the schematic connection should not be placed over the existing diagram as it only has wire labels for the wiring that was changed or added during the conversion.

(a)

Table 7. Wiring diagrams

Number Type Heat Voltage

23130064 Control Electrical Electric/None All 23130067 Control Electrical Gas All 23130053 Pow er Electrical Electric/None 208-230 23130054 Pow er Electrical Electric/None 460 23130345 Pow er Electrical Gas 208-230 23130347 Pow er Electrical Gas 460 23130376 Schematic Electrical All All 01860036 Schematic Connection All All

(a) Always refer to the most recent revision of each wiring diagram.

In addition to the wiring diagrams, affix the name number and serial number near the original unit nameplate sticker.

plate sticker that contains the upgrade order

in kit 018600350100

the top section of

Setting Economizer Damper Positions

Note: New settings are needed for the economizer

damper position so that the amount of outdoor air can keep up with the varying fan speed.

For units not configured with demand control ventilation

additio

(DCV), outdoor airflow accuracy is supported; directions for setting damper positions with DCV installed are included in the DCV installation literature (ACC-SVN16*-EN). The operation is similar to OA CFM Compensation on

nal minimum position setpoints to increase

Traditional VAV units, with the addition of a Design Minimum Position setpoint at Middle Fan Speed Command. The following setpoint potentiometers will be used on the RTEM:

1. Design Min at Minimum Fan Speed Command (RTEM DCV Min)

2. Design Min at Middle Fan Speed DCV Setpoint LL)

3. Design Min at Full Fan Speed Command (RTEM Design Min)

The contro position between the user-selected setpoints based on the supply fan speed command. By default, the Design Minimum Position schedule is a linear line through all user selectable Design Minimum Position setpoints. As with Demand Controlled Ventilation, if the Design Minimum Position at Middle fan speed command is set to a point that would be higher than the calculated linear line between the Design Minimum Position setpoints at Minimum and Maximum fan speed command, the minimum position is limited to the point that would make the Design Minimum Position schedule linear.

Provisions have been made in Service Test Mode to allow

r prope

1. To set the Design Minimum Position setpoint at

2. To set the Design Minimum Position setpoint at Middle

3. To set the Design Minimum Position setpoint at Full

ller calculates the a

r damper minimum position setup:

inimum Fa

M (Fan ON) or Step 2 (Economizer Open) and make the proper adjustment.

an Spe

F make the proper adjustment.

Fan Spe make the proper

n Speed, set the unit to operate at Step 1

ed, set the unit to operate at Step 3 (Cool 1) and

ed, set the unit to operate at Step 4 (Cool 2) and

adjustment.

ctive

Command (RTEM

OA Damper Minimum

Zone Sensor

For fully modulating Single Zone VAV operation, a zone temperature sensor is required. A zone temperature sensor does not ship with the upgrade kit. Wiring for the zone temperature sensor is included with the sensor if purchased separately.

If thermostat control is being replaced b to achieve fully modulating single zone VAV operation, it is possible to reuse the thermostat wires to connect in the zone sensor. If the unit has been upgraded using the single zone VAV parts and wiring method found in this manual, no additional settings are needed for the unit perform as a single zone VAV unit.

A thermostat will NOT provide fully modulating single zone VAV contro single zone VAV parts and wiring but still has thermostat control, the unit will revert to 2-speed fan control unless a zone sensor is added.

l. If the unit has been upgraded using the

y the zone sen

sor

PART-SVN227B-EN 13

Page 14

Page 15

Page 16

Trane and American Standard create comfortable, energy efficient indoor environments for commercial and residential applications. For more information, please visit trane.com or americanstandardair.com.

Trane and American Standard have a policy of continuous product and product data improvement and reserve the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.

PART-SVN227B-EN 25 Jun 2020

Supersedes PART-SVN227A-EN (Sep 2015)