Trane RSDH0012 User manual

Rental Services
Desiccant Dehumidification Units
Installation, Operation and Maintenance
July 2020 SRV-SVX04B-EN
SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of
heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training.
Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury.
When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are
attached to the equipment.

© 2020 Trane SRV-SVX04B-EN
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 defined as follows:
WARNING Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTIONsIndicates 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.
NOTICE Indicates a situation that could result in
equipment or property-damage only
accidents.
Important Environmental Concerns
Scientific research has shown that certain man-made
chemicals can affect the earth’s naturally occurring
stratospheric ozone layer when released to the
atmosphere. In particular, several of the identified
chemicals that may affect the ozone layer are refrigerants
that contain Chlorine, Fluorine and Carbon (CFCs) and
those containing Hydrogen, Chlorine, Fluorine and
Carbon (HCFCs). Not all refrigerants containing these
compounds have the same potential impact to the
environment. Trane advocates the responsible handling of
all refrigerants-including industry replacements for CFCs
and HCFCs such as saturated or unsaturated HFCs and
HCFCs.
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 according to local rules. For
the USA, 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
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
MUST put on all PPE required for the work being
undertaken (Examples; cut resistant gloves/sleeves,
butyl gloves, safety glasses, hard hat/bump cap, fall
protection, electrical PPE and arc flash clothing).
ALWAYS refer to appropriate Safety Data Sheets
(SDS) and OSHA guidelines for proper PPE.
• When working with or around hazardous chemicals,
ALWAYSrefer totheappropriateSDSandOSHA/GHS
(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, or
flash, technicians MUST put on all PPE in accordance
with OSHA, NFPA 70E, or other country-specific
requirements for arc flash protection, PRIOR to
servicing the unit. NEVER PERFORM ANY
SWITCHING, DISCONNECTING, OR VOLTAGE
TESTING WITHOUT PROPER ELECTRICAL PPE AND
ARC FLASH CLOTHING. ENSURE ELECTRICAL
METERS AND EQUIPMENT ARE PROPERLY RATED
FOR INTENDED VOLTAGE.

WARNING
Follow EHS Policies!
Failure to follow instructions below could result in
death or serious injury.
• All Trane personnel must follow the company’s
Environmental, Health and Safety (EHS) policies
when performing work such as hot work, electrical,
fall protection, lockout/tagout, refrigerant handling,
etc. Where local regulations are more stringent than
these policies, those regulations supersede these
policies.
• Non-Trane personnel should always follow local
regulations.
Introduction
SRV-SVX04B-EN 3
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.
Revision History
Updated for Trane Technologies.

4SRV-SVX04B-EN
Table of Contents
Desiccant Dehumidification Unit Overview . 5
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Units Affected . . . . . . . . . . . . . . . . . . . . . . . . . 5
General Information . . . . . . . . . . . . . . . . . . . 5
Unit Specifications . . . . . . . . . . . . . . . . . . . 6
Weights and Dimensions . . . . . . . . . . . . . . 6
Rigging Guidelines . . . . . . . . . . . . . . . . . . . . . . 7
Electrical Information . . . . . . . . . . . . . . . . . . . . 8
Unit Controls and Sequence of Operation . . 9
Fan Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . 14
Installation/Start-up Guidelines . . . . . . . . . . 19
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Start-up Guidelines . . . . . . . . . . . . . . . . . . . 19
Shut Down Guidelines . . . . . . . . . . . . . . . . 19
Maintenance Guidelines . . . . . . . . . . . . . . . 19

SRV-SVX04B-EN 5
Desiccant Dehumidification Unit Overview
Introduction
This Installation, Operation and Maintenance (IOM)
manual covers the desiccant dehumidification units (DHU)
available to rent from Trane Rental Services for temporary
dehumidification solutions. This includes DHU technical
information, start-up information and unit maintenance.
The information contained in this manual is provided to
ensure the safe installation and operation of the
equipment and its surroundings.
The information provided in this IOM is to be used as a
reference for each DHU to aid in determining unit size,
power requirements, or lifting requirements. If additional
information regarding a particular unit is required, please
contact Trane Rental Services.
Contact Trane Rental Services Marketing for availability of
equipment (including ancillary items: electrical cable,
flexible duct, etc.) prior to securing rental equipment.
Equipment is available on a first-come, first-serve basis,
but can be reserved with a signed rental agreement.
Call Rental Services 24/7 at 1-800-755-5115 for specific
questions.
Units Affected
RSDH0012F0XX –Desiccant Dehumidification Unit (DHU)
with post cooling coil
Note: Where XX represents the unique inventory
number.
General Information
The Trane Rental Services DHUs are highly efficient at
providing clean, dehumidified air with minimal electrical
power required. The DHUs can be used in free blow or
ducted applications. Each unit has a single horizontal
supply air connection and a single return air connection
and is equipped with a post-cooling coil to aid in reducing
leaving air temperatures when required. When used in
free blow applications, ducting on the front of the unit
must be removed. Flexible duct is available upon request.
Table 1.
Model RSDH0012
Manufacturer Munters™
Airflow Orientation Horizontal
Nominal Airflow 4,750 cfm
Blower RPM 3500
Max Static Discharge
Pressure 1.70 in. ESP
Post-cooling 
Coil Water
Connection(s)1
Type Flanged
Size 3 inches
Supply Air
Connection(s)
Type Round
Quantity 1
Size 17.75 inches
Return Air
Connection(s)
Type Round
Quantity 1
Size 17.75 inches
Reactivation Air
Connection (s) None (Free Blow)
Pre Filter Type 30% efficient
Quantity and
Dimensions
(2) 12 in x 24 in
(2) 24 in x 24 in
Inlet Delta P 0.21 in. WC
Final Delta P 0.42 in. WC
1 Unit can be provided with reducer to provide either 2.5 inch or 4 inch
grooved water connection to allow connection to our flexible water hose
accessories.

Desiccant Dehumidification Unit Overview
6SRV-SVX04B-EN
Unit Specifications
Table 2.
Dehumidifier
Process Air Reactivation Air
Desiccant
Type SCFM
Moisture
Removal
(lb/hr)
WheelP 
(in WC)
Unit P 
(in WC) SCFM WheelP  (in WC)
Unit P 
(in WC)
Energy 
Type Input kW
SiGel 4750 102 1.82 2.12 1050 1.63 3.00 Electric 84
Fans
Fan Data Performance
Location Size Rotation Motor HP RPM SCFM TSP 
(in WC)
Sys Loss 
(in WC)
ESP 
(in WC) 
Supply 15 CW 10 3500 4750 7.04 5.34 1.70 3
React 12-1/4-7 CW 3 3450 1050 4.50 3.00 1.50
Post Cooling Coil
Airside Values Coil Dimensions Fluidside values
Type SCFM Load MBH P (in WC) Face ft2Rows FPI Flow (gpm) P (ft)
Post Cool 4750 366 1.58 10 10 12 57 24.5
Weights and Dimensions
Table 3.
Length Width Height Weight
15 ft 2 in 6 ft 2 in 6 ft 5 in 4,175 lbs

SRV-SVX04B-EN 7
Rigging Guidelines
The DHUs are equipped with fork pockets on two sides and
lifting rings along the base of the unit.
WARNING
Heavy Objects!
Ensure that all the lifting equipment used is properly
rated for the weight of the unit being lifted. Each of the
cables (chains or slings), hooks, and shackles used to
lift the unit must be capable of supporting the entire
weight of the unit. Refer to Table 3 for unit weight.
Lifting cables (chains or slings) may not be of the same
length. Adjust as necessary for even unit lift. Other
lifting arrangements could cause equipment or
property damage. Failure to follow instructions above
or properly lift unit could result in death or serious
injury.
Figure 1.

8SRV-SVX04B-EN
Electrical Information
The DHUs have connections to allow for use with our
available 2/0 electrical cable. Below is a list of electrical
data for these units. If additional information is needed,
please contact Trane Rental Services.
Table 4.
Model RSDH0012
Fused Disconnect? Yes
Unit Power 460V, 3-phase
Unit MCA 154.1 A
Unit MOP 175 A
Supply Motor FLA 11.6 A
Reactivation Motor FLA 3.6 A

SRV-SVX04B-EN 9
Unit Controls and Sequence of Operation
1 - Customer Interface
1. Sequence is as follows:
a. “AUTO / OFF / MANUAL” selector switch is
provided for starting the system in the Auto mode
by interfacing with the customer supplied
equipment. A contact closure via the “ON/OFF”
selector switch between TB06#61 and TB06#I0.1
will let the system start in auto mode. The MANUAL
mode does not require the dry contact closure input
to enable the system to start. The selector switch
has an integral light and will stay illuminated at all
times to indicate the equipment has power.
2 - Auxiliary Dry Contacts
1. Operational System States
a. SYSTEM FAULT: Auxiliary dry contacts of CR02 are
provided for customer interlocking and shall close
whenever the dehumidifier goes into any fault as
described in Section 6.
b. SYSTEM RUN (MASTER CONTROL RELAY):
Auxiliary dry contacts of MS03 are provided for
customer interlocking and shall close whenever the
process blower is in operation.
c. SYSTEM WARNING: Auxiliary dry contacts of CR03
are provided for customer interlocking and shall
close whenever the dehumidifier goes into a
warning condition.
d. D/H RUN: Auxiliary dry contacts of MS02 are
provided for customer interlocking and shall close
whenever the dehumidifier is in operation.
3 - Start-up
1. Main Power Initialization Sequence:
a. Energize the main power to the equipment by
supplying correct voltage directly to the unit by
using the system’s main fused disconnect. (The
selector switch will illuminate indicating the
equipment is energized.)
b. The equipment’s high voltage is supplied to all
motor starters and the control transformer(s). The
control voltage (115V/1Ø/60Hz) is now being
supplied to the control circuits.
c. The HMI LCD, located on or in (visible through the
door) the Main control enclosure is energized and
will display the “System Screen” (Figure 2).
d. There is a 10 sec delay in the equipment startup of
the system once power is activated via the selector
switch.
Figure 2.
2. Startup:
a. Normal startup operation shall occur once the main
selector switch (SS01) is placed in the MANUAL or
in AUTO position with a customer-supplied
auxiliary interlock (dry-contact) closed between
TB06#61 and TB06#I0.2.
4 - Shutdown
1. Normal Shutdown
A Shutdown shall occur with the following.
a. Selector Switch (SS01) is maintained in the OFF
position.
b. Selector Switch (SS01) is maintained in Auto
position with a contact opening across TB06 # 61
and TB06 # I0.2.
c. A fault has occurred.
2. Sequence of Normal Shutdown
a. The reactivation control Proportional Control Loop,
and associated fault circuits are de-energized.
b. The process control loops are de-energized (section
6).
c. A purge timer in the (PLC1) is a delay time with a
fixed on time of three (3) minutes. This allows the
air to continue to cool the desiccant wheel. When
the timer has completed its count cycle, the
desiccant wheel drive motor (MTR1), the
reactivation blower motor (MTR2), and supply
blower motor (MTR3-optional) are all de-energized.
NOTICE
Improper Shutdown!
Improperly shutting down equipment could cause
equipment-only damage.
Do not shut down unit by de-energizing main power
prior to completion of purge cycle. (Wait for
“PURGING” to change to either “STANDBY” or
“READY” before de-energizing main power.).
5 - Faults & Warnings
Note: ESC or Help button may be pressed twice quickly to
exit back to the system screen at any time during
screen navigation.
1. Alarm Indication

Unit Controls and Sequence of Operation
10 SRV-SVX04B-EN
a. Fault and warning indication is seen in two possible
manners on the equipment’s control enclosure. The
HMI display and fault warning lights. The HMI will
display the blinking triangle with exclamation point
and the fault message on the Alarm screen 
(Figure 3).
b. A fault results in the Red Light (LT02) remaining
illuminated constantly.
Figure 3.
2. List of System and DH Faults
a. FAULT - D/H WHEEL MOTOR STARTER
PROTECTOR TRIPPED
i. If the desiccant drive motor starter/protector
(MSP1) trips the system is faulted.
ii. The system will go into the shutdown sequence
as described in Section 4, and the system
auxiliary dry contacts close in sequence
(described in Section 2), also process blower
(optional) will purge.
iii. The dehumidifier will be held in the 'Fault'
condition by (PLC1). To restart the dehumidifier
clear the alarm pressing the acknowledge ACK
on the HMI, reset the overload, and go to the
ALARM screen and press the F4 RESET key this
resets the PLC. To restart the system, the
selector switch (SS01) must be moved to the
“OFF” position, then move (SS01) back to the
“AUTO” or “MANUAL” position.
b. FAULT - REACTIVATION MOTOR STARTER
PROTECTOR TRIPPED
i. If the reactivation blower motor starter/protector
(MSP2) trips the system is faulted.
ii. The dehumidifier goes into the shutdown
sequence, as described in Section 4, and the
system auxiliary dry contacts sequence as
described in Section 2 The dehumidifier will be
held in the 'Fault' condition by (PLC1). To restart
the dehumidifier clear the alarm pressing the
acknowledge ACK on the HMI, reset the
overload, and go to the ALARM screen and press
the F4 RESET key this resets the PLC. To restart
the system, the selector switch (SS01) must be
moved to the “OFF” position, then move (SS01)
back to the “AUTO” or “MANUAL” position.
c. FAULT - SUPPLY BLOWER MOTOR STARTER
PROTECTOR TRIPPED/ VFD FAULT (optional)
i. If the supply blower motor starter/protector
(MSP3) trips or the customer-supplied variable
frequency drive (VFD) goes into a Fault, the
system is faulted.
ii. The system will go into the shutdown sequence
(described in Section 4), and the system
auxiliary dry contacts close in sequence
(described in Section 2).
iii. The dehumidifier will be held in the 'Fault'
condition by (PLC1). To restart the dehumidifier
clear the alarm pressing the acknowledge ACK
on the HMI, reset the overload, and go to the
ALARM screen and press the F4 RESET key this
resets the PLC. To restart the system, the
selector switch (SS01) must be moved to the
“OFF” position, then move (SS01) back to the
“AUTO” or “MANUAL” position.
d. FAULT - DEHUMIDIFIER WHEEL ROTATION
i. Limit switch (LS01) is wired normally closed,
and is located inside the dehumidifier wheel
compartment next to desiccant wheel. As the
wheel turns, a cam fastened to the wheel
housing opens this limit switch.
ii. If limit switch (LS01) is not opened once every
600 seconds, a timer in (PLC1) times out the
system is faulted.
iii. The system will go into the shutdown sequence
(described in Section 4), and the system
auxiliary dry contacts close in sequence
(described in Section 2).
iv. The dehumidifier will be held in the 'Fault'
condition by (PLC1). To restart the dehumidifier
clear the alarm pressing the acknowledge ACK
on the HMI, reset the overload, and go to the
ALARM screen and press the F4 RESET key this
resets the PLC. To restart the system, the
selector switch (SS01) must be moved to the
“OFF” position, then move (SS01) back to the
“AUTO” or “MANUAL” position.
e. FAULT – REACTIVATION ELECTRIC HEATER
OVERTEMPERATURE
i. Temperature switch (TS01) is located in the
reactivation Electric Heater and is furnished to
detect extreme temperature level or heat
buildup.
ii. Temperature switch (TS01) is located in the
reactivation “Heated To” duct and is furnished
to detect extreme temperature level or heat
buildup.
iii. The system will go into the shutdown sequence
(described in Section 4), and the system
auxiliary dry contacts close in sequence
(described in Section 2).
iv. The dehumidifier will be held in the 'Fault'
condition by (PLC1). To restart the dehumidifier

Unit Controls and Sequence of Operation
SRV-SVX04B-EN 11
clear the alarm pressing the acknowledge ACK
on the HMI, reset the overload, and go to the
ALARM screen and press the F4 RESET key this
resets the PLC. To restart the system, the
selector switch (SS01) must be moved to the
“OFF” position, then move (SS01) back to the
“AUTO” or “MANUAL” position.
6 - List of System and DH Warnings
1. WARNING – REACTIVATION LOW TEMP
a. LOW TEMP (Reactivation Low Temperature Fault
Set point). The adjustment range is 90.0 to 110.0.
The parameter corresponds to the value of the set
point in engineering units (Typical set point =
110°F).
7 - Proportional Control Loops/ Dh Interlocks
1. Reactivation Heat Energy Control
a. The Reactivation Electric Heater Solid State Relays
accepts a 0-10V modulating signal from the logic
controller to control the Reactivation Inlet air
temperature, as sensed by the reactivation air inlet
temperature transmitter (TC01 The Reactivation
Inlet temperature set point will be varied based on
the Reactivation outlet control PID loop to maintain
maximum required Reactivation inlet temperatures
over a wide range of DH load conditions.
b. When the reactivation outlet PID loop output is 0%
the Reactivation inlet set point will be 200°F. When
the reactivation outlet PID loop output is 100% the
Reactivation Inlet set point will be 325°F.
8 - Human Machine Interface Control (Op73
Simatic Panel)
1. Screen descriptions, navigation and security:
Note: Other visual options are password protected for
FACTORY USE ONLY.
a. System Screen This screen is the first screen that
comes up when power is applied to the equipment
(Figure 2). The System screen displays the
equipment’s operational status along with separate
indication for the Reactivation air stream. The
System screen also acts as the navigation portal for
all of the screens configured in the system. All
navigation references in this section assume the
operator starts on the System screen. At any time
during navigation, the ESC button on the Simatic
Panel may be pressed twice to return to the System
screen. 
Equipment Status Indications
“SYSTEM” displays the modes of operation of the
process as listed below:
READY = The system is ready to run and there are no
faults and the interlocks are made.
RUNNING = The systemis running and process control
loops are running if they are enabled.
FAULTED = The system has faulted.
PURGING = The system is going thru a shutdown
sequence and is purging.
“REACT” displays the modes of operation of the
dehumidifier as listed below:
READY = The DH is ready to run and there are no faults
and the interlocks are made.
RUNNING = The DH is running and process control
loops are running if they are enabled.
FAULTED = The DH has faulted.
PURGING = The DH is going thru a shutdown sequence
and is purging.
STANDBY = The System is Running and the DH is
stopped because there is no call for dehumidification
(full bypass).
2. Reactivation Temperature 
Pressing the Up Arrow once navigates to this screen
(Figure 4). The Reactivation Temperature screen
displays the real time indication of the reactivation
inlet and outlet temperatures (degrees Fahrenheit).
Figure 4.
3. Date/Time 
Pressing the Up Arrow twice navigates to this screen
(Figure 5). The Date/Time screen displays the current
date and time. This may be configured by the customer
using the correct username and password. The display
will change to the Username and Password screen
(Figure 6), prompted by pressing F1.
Figure 5.
Figure 6.

Unit Controls and Sequence of Operation
12 SRV-SVX04B-EN
4. Username & Password 
The operator will be prompted by the appearance of
the password screen (Figure 6) on occasions where
secure parameters are attempting to be accessed.
(Contact Rental Services Technical Support if a
password is required.). Then ENTER button will
reverse highlight the character for editing. Use the
arrows buttons as necessary to select the desired
characters. Once the last character has been located
press enter, NOT ANY ARROW, to proceed to the
password window. Press ENTER again to allow editing
again for the password. Once the last character has
been located press enter, NOT ANY ARROW, the “OK”
shall display a dotted box within, press ENTER to
accept and the screen will return to make the selection
without security restriction.
5. Run Time Meter 
Pressing the Down Arrow once navigates to this screen
(Figure 7). The Run Time Meter screen displays the
amount of time in hours that the equipment has been
in operation. There is an indication for DH displaying
the amount of time dehumidification has been
requested and in operation. These values, shown in
hours, may vary dependant on the equipment’s
configuration.
Figure 7.
6. Control Group Selection 1* 
Pressing F1 (PID) will navigate to this screen (Figure 8).
The OP73 Display may prompt the operator for
Username and Password (figure 9); this must be
entered to proceed (section 7.7). See Section 834 for
information regarding Username and Password. The
Control Group Selection 1 screen displays the various
system loops available on the equipment.
a. Alarms 
Pressing F2 (ALM) will navigate to this screen
(Figure 8). The Alarm screen displays the Faults and
Warnings the system encountered during
operation. The triangle with exclamation point will
indicate to the operator when an alarm condition
exists. The current alarm message may be cleared
without clearing the history by pressing the ACK
button.
The Alarm Screen displays and records information
on triggered alarms. Each time an alarm is
triggered, it is added to the Alarm History list

Figure 9, and the last alarm shall be displayed.
Figure 8.
Figure 9.
b. F4 RESET 
The operator must press the F4 button to reset a
fault in the PLC; this will clear all system faults and
enable the equipment to be restarted by cycling the
selector switch. The selector switch may also be
used as the system reset by turning it to the off
position and return it to the auto or manual
position. The acknowledge button (ACK) must be
pressed to clear the message and alarm symbol
indication. The system screen will display READY
after a fault has been reset.
c. F1 CLEAR History 
The alarm history (Figure 9.) can be viewed by
pressing the down arrow first and both up and
down arrows to scroll the alarms stored. Clearing
the alarm history press F1. It will prompt for the
Username and Password, upon entering the correct
characters the operator has the ability to clear the
history.

SRV-SVX04B-EN 13
Fan Curve
Figure 10.

14 SRV-SVX04B-EN
Wiring Diagrams
Figure 11.
Figure 12.

Wiring Diagrams
SRV-SVX04B-EN 15
Figure 13.
Figure 14.

Wiring Diagrams
16 SRV-SVX04B-EN
Figure 15.
Figure 16.

Wiring Diagrams
SRV-SVX04B-EN 17
Figure 17.
Figure 18.

Wiring Diagrams
18 SRV-SVX04B-EN
Figure 19.
Figure 20.

SRV-SVX04B-EN 19
Installation/Start-up Guidelines
Installation
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote
disconnects, before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
[ ] Confirm unit is properly leveled.
[ ] Verify air inlet and outlet are clear of any debris or
obstructions.
NOTICE
Proper Airflow!
The reactivation air from the unit could be in excess of
180°F. Do not position unit where reactivation outlet air
could come into contact with sensitive materials and
cause equipment and property damage.
[ ] Connect power cable from unit to the power source
and confirm that the wires are properly phased,
connected and locked securely to panel.
[ ] For ducted applications:
•Install the supply and return air ducts on the duct
adapters on the front of the unit. Ensure as straight
a run of duct as possible.
[ ] For free blow applications:
•No duct installation required.
Start-up Guidelines
[ ] Verify that the unit disconnect is in the “OFF” position
on the unit.
[ ] Energize the source power to the DHU.
[ ] Switch the unit disconnect to the “ON” position to
supply power to the unit.
Figure 21. Main Unit Disconnect
[ ] Consult the “Unit Controls and Sequence of
Operation” section on page 8 of this document for unit
operation.
[ ] Close all covers (local and remote panels) and secure.
Shut Down Guidelines
[ ] Consult the “Shutdown Sequence” section on page 8
of this document for unit shutdown procedure.
Maintenance Guidelines
The motor and blower bearings are permanently
lubricated and require no maintenance. The desiccant
wheel is belt driven. The drive belt should be examined
periodically for wear and correct tension.
Each unit is provided with disposable filters that are
installed in the return air section. The filter access panel
must be removed to gain access to the filters. Check filters
periodically to verify that they are clean.

©2020 Trane
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efficient indoor environments for commercial and residential applications. For more information,
please visit trane.com or tranetechnologies.com.
SRV-SVX04B-EN 20 Jul 2020
Supersedes SRV-SVX04A-EN (June 2012)