Trane SRV-SVX04C-EN Installation and operating instructions

Trane Rental Services
Desiccant Dehumidification Units
Installation, Operation, and Maintenance
August 2022 SRV-SVX04C-EN
product image goes here, centered on page
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.

©2022 Trane SRV-SVX04C-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 AirAct (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/national 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,
ALWAYS refer to the appropriate SDS and OSHA/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-SVX04C-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 the General Information chapter.
• Updated the Installation and Start-up Guidelines in the Unit
Specifications chapter.
• Updated the Installation Controls chapter.

4SRV-SVX04C-EN
Table of Contents
General Information . . . . . . . . . . . . . . . . . . . . . . . 5
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Unit Specifications and Weights . . . . . . . . . . . . 6
Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Start-up Guidelines . . . . . . . . . . . . . . . . . . . . . 7
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Installation - Controls . . . . . . . . . . . . . . . . . . . . . . 9
Customer Interface . . . . . . . . . . . . . . . . . . . . . 9
Auxiliary Dry Contacts - Operational System
States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Main Power Initialization Sequence . . . . . . . 9
Normal Start-up . . . . . . . . . . . . . . . . . . . . . . 9
Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Faults and Warnings . . . . . . . . . . . . . . . . . . . 10
Alarm Indication . . . . . . . . . . . . . . . . . . . . . 10
List of System and DH Warnings . . . . . . . . 11
Proportional Control Loops/ DH Interlocks . 11
Human Machine Interface Control 
(Op73 Simatic Panel) . . . . . . . . . . . . . . . . . 12
Fan Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Shutdown and Maintenance . . . . . . . . . . . . . . . 15
Shut Down Guidelines . . . . . . . . . . . . . . . . . . 15
Maintenance Guidelines . . . . . . . . . . . . . . . . 15
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . 16

SRV-SVX04C-EN 5
General Information
Overview
This 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. Information contained in this manual is provided
to ensure the safe installation and operation of the equipment
and its surroundings.
Use this manual as a reference to determine unit size, power
requirements, or lifting requirements. If additional information
is required, contact Trane Rental Services (TRS).
Prior to securing rental equipment, contact TRS for availability
including ancillary items: electrical cable, flexible duct, etc.
Equipment is available on a first-come, first-serve basis, but
can be reserved with a signed rental agreement.
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, 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. RSDH5000 Desiccant dehumidification unit
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)
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
Note: 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.

6SRV-SVX04C-EN
Unit Specifications and Weights
Table 2. Unit specifications
Dehumidifier
Desiccant Type
Process Air Reservation Air
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
Location
Fan Data Performance
Size Rotation Motor HP RPM SCFM TSP
(in. wc)
Sys Loss
(in. wc)
ESP
(in. wc) T
Supply 15 CW 10 3500 4750 7.04 5.34 1.70 3
React 12-1/4-7 CW 33450 1050 4.50 3.00 1.50
Post Cooling Coil
Type
Airside Values Coil Dimensions Fluidside Values
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
Table 3. Dimensions and weights
Length Width Height Weight
15 ft 2 in. 6 ft 2 in. 6 ft 5 in. 4175 lb
Rigging
DHUs are equipped with fork pockets on two sides and lifting
rings along the base of the unit.
WARNING
Heavy Objects!
Failure to follow instructions below could result in unit
dropping which could result in death or serious injury,
and equipment or property-only damage.
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. Lifting cables (chains or slings) may
not be of the same length. Adjust as necessary for even
unit lift.
Figure 1. Desiccant dehumidification unit

SRV-SVX04C-EN 7
Installation
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. Verify that no power is present
with a voltmeter.
1. Confirm unit is level.
2. Verify air inlet and outlet are clear of any debris or
obstructions.
NOTICE
Proper Airflow!
Failure to follow the instructions below could result in
equipment damage.
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.
3. Connect power cable from unit to the power source and
confirm wires are properly phased, connected, and locked
securely to panel.
a. For ducted applications, install the supply and return air
ducts on the duct adapters (front of the unit). Ensure
duct is straight.
b. For free blow applications, no duct installation is
required.
Start-up Guidelines
1. Verify that the unit disconnect is in the OFF position on the
unit.
2. Energize the source power to the DHU.
3. Switch the unit disconnect ON to supply power to the unit.
Figure 2. Main unit disconnect
4. Refer to “Installation - Controls,” p. 9 for unit operation.
5. Close all covers (local and remote panels) and secure.

8SRV-SVX04C-EN
Electrical Data
DHUs have connections to allow for use with TRS available 
2/0 electrical cable. Below is a list of electrical data for these
units. If additional information is needed, contact Trane Rental
Services.
Table 4. Electrical data - RSDH5000
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-SVX04C-EN 9
Installation - Controls
Customer Interface
• Start the system in Auto mode using the AUTO/OFF/
MANUAL selector to interface with customer supplied
equipment.
• Start the system in Auto mode by selecting the contact
closure through the ON/OFF selector switch between
TB06#61 and TB06#10.
• 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 illuminate
to indicate the equipment has power.
Auxiliary Dry Contacts -
Operational System States
•SYSTEM FAULT - Auxiliary dry contacts of CR02 are
provided for customer interlocking and will close when the
dehumidifier goes into any fault as described in the list of
system and DH warnings. See “List of System and DH
Warnings,” p. 11.
•SYSTEM RUN (CONTROL RELAY) - Auxiliary dry
contacts of MS03 are provided for customer interlocking
and will close when the process blower is in operation.
•SYSTEM WARNING - Auxiliary dry contacts of CR03 are
provided for customer interlocking and will close when the
dehumidifier goes into a warning condition.
•D/H RUN - Auxiliary dry contacts of MS02 are provided for
customer interlocking and will closed when the
dehumidifier is in operation.
WARNING
Hazardous Service Procedures!
Failure to follow all precautions in this manual and on
the tags, stickers, and labels 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 following
instructions: Unless specified otherwise, disconnect all
electrical power including remote disconnect and
discharge all energy storing devices such as capacitors
before servicing. Follow proper lockout/tagout
procedures to ensure the power can not be
inadvertently energized. When necessary to work with
live electrical components, have a qualified licensed
electrician or other individual who has been trained in
handling live electrical components perform these
tasks.
Start-up
Main Power Initialization Sequence
1. Energize the main power to the equipment by supplying
correct voltage directly to the unit using the system main
fused disconnect.
Note: The selector switch will illuminate indicating the
equipment is energized.
2. High voltage is supplied to all motor starters and control
transformer(s). The control voltage (115V/1Ø/60Hz) is
supplied to the control circuits.
3. The HMI LCD (located on or in, visible through the door)
main control enclosure is energized and will display
System Screen. See Figure 3.
4. There is a 10 second delay in the equipment start-up once
power is activated by the selector switch.
Figure 3. HMI LCD
Normal Start-up
Normal start-up occurs when the main selector switch (SS01)
is placed in the MANUAL or AUTO position with a customer-
supplied auxiliary interlock (dry-contact) closed between
TB06#61 and TB06#I0.2.
Shutdown
A normal shutdown will occur if:
• Selector switch (SS01) is maintained in the OFF position.
• Selector switch (SS01) is maintained in AUTO position
with a contact opening across TB06 # 61 and TB06 # I0.2.
• A fault has occurred.
Normal shutdown sequence of operation:
1. The reactivation control proportional control loop and fault
circuits are de-energized.
2. The process control loops are de-energized in the list of
system and DH warnings. See “List of System and DH
Warnings,” p. 11.
3. A purge timer in the (PLC1) is a delay time with a fixed, on
time of three 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

Installation - Controls
10 SRV-SVX04C-EN
reactivation blower motor (MTR2), and supply blower
motor (MTR3-optional) are all de-energized.
NOTICE
Equipment Damage!
Failure to follow all instructions could result in
equipment damage!
Do not shut down unit by de-energizing main power
prior to the completion of the purge cycle. Wait for
PURGING to change to STANDBY or READY before de-
energizing main power.
Faults and Warnings
Important: Press ESC or Help button twice quickly to exit
back to the system screen at any time during
screen navigation.
Alarm Indication
Fault and warning indication include 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.
See Figure 4.
A fault results in the red light (LT02) constantly illuminating.
Figure 4. HMI alarm indication
Table 5. List of system and DH faults
Fault Description
FAULT - D/H WHEEL MOTOR STARTER PROTECTOR
TRIPPED
If the desiccant drive motor starter/protector (MSP1) trips, the system is faulted.
The system will go into the shutdown (“Shutdown,” p. 9) sequence and the system auxiliary dry
contacts close in sequence (“Auxiliary Dry Contacts - Operational System States,” p. 9), process
blower (optional) will purge.
The dehumidifier will be held in the Fault condition by (PLC1).
To restart the dehumidifier:
1. Clear the alarm pressing the acknowledge ACK on the HMI.
2. Reset the overload, go to the ALARM screen, and press the F4 RESET key, which resets
the PLC.
To restart the system:
1. Move the selector switch (SS01) to the OFFposition.
2. Move the (SS01) back to the AUTOor MANUAL position.
FAULT - REACTIVATION MOTOR STARTER
PROTECTOR TRIPPED
If the reactivation blower motor starter/protector (MSP2) trips, the system is faulted.
The dehumidifier goes into the shutdown sequence. See “Normal shutdown sequence of
operation:,” p. 9 and “Auxiliary Dry Contacts - Operational System States,” p. 9.
The dehumidifier will be held in the Fault condition by (PLC1).
To restart the dehumidifier:
1. Clear the alarm pressing the acknowledge ACK on the HMI.
2. Reset the overload, and go to the ALARM screen, and press the F4 RESET key, which
resets the PLC.
To restart the system:
1. Move the selector switch (SS01) to the OFFposition.
2. Move the (SS01) back to the AUTOor MANUAL position.
FAULT - SUPPLY BLOWER MOTOR STARTER
PROTECTOR TRIPPED/ VFD FAULT (optional)
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.
The system goes into the shutdown sequence. See “Normal shutdown sequence of operation:,”
p. 9, and “Auxiliary Dry Contacts - Operational System States,” p. 9.
The dehumidifier will be held in the Fault condition by (PLC1).
To restart the dehumidifier:
1. Clear the alarm pressing the acknowledge ACK on the HMI.
2. Reset the overload, and go to the ALARM screen, and press the F4 RESET key, which
resets the PLC.
To restart the system:
1. Move the selector switch (SS01) to the OFF position.
2. Move the (SS01) back to the AUTO or MANUAL position.

Installation - Controls
SRV-SVX04C-EN 11
List of System and DH Warnings
WARNING – REACTIVATION LOW TEMP
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).
Proportional Control Loops/ DH Interlocks
Reactivation Heat Energy Control
• The reactivation electric heater solid state relays will
accept a 0-10V modulating signal from the logic controller
to control the reactivation inlet air temperature.
• This is sensed by the reactivation air inlet temperature
transmitter (TC01).
• The reactivation inlet temperature set point will vary based
on the reactivation outlet control PID loop to maintain
maximum, required reactivation inlet temperatures over a
wide range of DH load conditions.
• 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.
FAULT - DEHUMIDIFIER WHEEL ROTATION
Limit switch (LS01) is wired normally closed and 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.
If limit switch (LS01) is not opened once every 600 seconds, a timer in (PLC1) times out the
system is faulted.
The system goes into the shutdown sequence. See “Normal shutdown sequence of operation:,”
p. 9 and “Auxiliary Dry Contacts - Operational System States,” p. 9.
The dehumidifier will be held in the Fault condition by (PLC1).
To restart the dehumidifier:
1. Clear the alarm pressing the acknowledge ACK on the HMI.
2. Reset the overload, and go to the ALARM screen, and press the F4 RESET key, which
resets the PLC.
To restart the system:
1. Move the selector switch (SS01) to the OFF position.
2. Move the (SS01) back to the AUTO or MANUAL position.
FAULT – REACTIVATION ELECTRIC HEATER
OVERTEMPERATURE
Temperature switch (TS01) is in the reactivation electric heater and will detect extreme
temperature level or heat buildup.
Temperature switch (TS01) is in the reactivation heated to duct and will detect extreme
temperature level or heat buildup.
The system goes into the shutdown sequence. See “Normal shutdown sequence of operation:,”
p. 9 and “Auxiliary Dry Contacts - Operational System States,” p. 9.
The dehumidifier will be held in the Fault condition by (PLC1).
To restart the dehumidifier:
1. Clear the alarm pressing the acknowledge ACK on the HMI.
2. Reset the overload, and go to the ALARM screen, and press the F4 RESET key, which
resets the PLC.
To restart the system:
1. Move the selector switch (SS01) to the OFF position.
2. Move the (SS01) back to the AUTO or MANUAL position.
Table 5. List of system and DH faults (continued)
Fault Description

Installation - Controls
12 SRV-SVX04C-EN
Human Machine Interface Control 
(Op73 Simatic Panel)
Note: Other visual options are password protected for
FACTORY USE ONLY.
Table 6. Screen descriptions, navigation, and security
System 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.
“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 system is running, and process control loops are running if enabled.
FAULTED The system has faulted.
PURGING The system is going through 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 enabled.
FAULTED The DH has faulted.
PURGING The DH is going through a shutdown sequence and is purging.
STANDBY The system is running, and the DH stopped because there is no call for dehumidification (full bypass).
1. Reactivation Temperature
a. Pressing the Up Arrow once navigates to this screen
(Figure 5).
b. The Reactivation Temperature screen displays the real
time indication of the reactivation inlet and outlet
temperatures (degrees Fahrenheit).
Figure 5. Reactivation temperature
2. Date/Time
a. Press the Up Arrow twice navigates to this screen
(Figure 6).
b. The Date/Time screen displays the current date and
time. This may be configured by the customer using the
correct username and password.
c. The display will change to the Username and Password
screen (Figure 7), prompted by pressing F1.
Figure 6. Date and time
Figure 7. Username and password
3. Username and Password
The operator will be prompted by the password screen
(Figure 7) when secure parameters are accessed.
Important: Contact Rental Services Technical Support if a
password is required.
The ENTER button will reverse highlight the character for
editing.
a. Use the arrow buttons as necessary to select the
desired characters.
b. Once the last character has been located, press
ENTER, to proceed to the password window. Important!
Do not press any arrow.

Installation - Controls
SRV-SVX04C-EN 13
c. Press ENTER again to edit the password.
d. Once the last character has been located press
ENTER. Do not press any arrow.
e. OK will display a dotted box. Press ENTER to accept,
and the screen will return to make the selection without
security restriction.
4. Run Time Meter
a. Press the Down Arrow once to navigate to this screen
(Figure 8).
Figure 8. Runtime meter
b. The Run Time Meter screen displays the amount of
time in hours the equipment has been operating. There
is an indication for DH displaying the amount of time
dehumidification has been requested and operating.
These values, shown in hours, may vary dependent on
the configuration of the equipment.
5. Control Group Selection 1*
a. Press F1 (PID)to navigate to this screen (Figure 9).
b. The OP73 Display may prompt the operator for
Username and Password (Figure 10). Enter this to
proceed. See section 834 for information regarding
Username and Password. The Control Group Selection
1 screen displays the various system loops available on
the equipment.
Table 7. System loops
Alarms
1. Press F2 (ALM) to navigate to this screen (Figure 9).
2. 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.
3. Press the ACK button to clear the current alarm message without clearing the history.
Note: 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 10, and the last alarm is displayed.
F4 Reset
1. 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.
2. The selector switch may also be used as the system reset by turning it to the OFFposition and return it to the AUTO or MANUAL
position.
3. Press the acknowledge button (ACK) to clear the message and alarm symbol indication.
4. The system screen will display READY after a fault has been reset.
F1 CLEAR History
1. The alarm history (see Figure 10) can be viewed by pressing the Down Arrow first and both Up and Down Arrows to scroll the
alarms stored.
2. To clear the alarm history, press F1.
3. Enter the Username and Password to clear the history.
Figure 9. Alarm
Figure 10. Alarm history list

14 SRV-SVX04C-EN
Fan Curve
Figure 11. Fan curve

SRV-SVX04C-EN 15
Shutdown and Maintenance
Shutdown Guidelines
Refer to “Shutdown,” p. 9 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.

16 SRV-SVX04C-EN
Wiring Diagrams
Figure 12.
Figure 13.

Figure 14.
Figure 15.
Wiring Diagrams
SRV-SVX04C-EN 17

Figure 16.
Figure 17.
Wiring Diagrams
18 SRV-SVX04C-EN

Figure 18.
Figure 19.
Wiring Diagrams
SRV-SVX04C-EN 19

Figure 20.
Figure 21.
Wiring Diagrams
20 SRV-SVX04C-EN