Trane Intellipak 2 Service Manual

							Service and Maintenance
RT-SVX24K-EN181
Fan Belt Adjustment
The supply fan belts and optional exhaust fan belts must
be inspected periodically to assure proper unit operation.
Replacement is necessary if the belts appear frayed or
worn. Units with dual belts require a matched set of belts
to ensure equal belt length.
When removing or installing the new belts, do not stretch them over the sheaves. Loosen the belts using the belt
tension adjustment bolts on the motor mounting base.
Once the new belts are installed, using a Browning or
Gates tension gauge (or equivalent), see Figure 121,
adjust the belt tension as follows:
1. To determine the appropriate belt deflection:
a. Measure the center-to-center shaft distance (ininc
 hes) between the fan and motor sheaves.
b. Divide the distance measured in Step 1a by 64; the resulting value represents the amount of belt
deflection that corresponds to the proper belt
tension.
Table 57. Grease Recommendation
Recommended Grease 
for Fan Bearings Recommended 
Operating Range
Exxon Unirex #2
Mobil 532  -20 F to 250 F
Mobil SHC #220
Texaco Premium RB
Table 58. Air-Cooled Condenser—Refrigerant Coil Fin Data
Tons Coil Type Coil Fin 
Config. Tube Dia. Coil Rows Fins per foot Coil Face 
Area (sq. ft.) Tube Type
90 
Evaporator Enhanced 1/2 3 16873.75 Internally  Finned
Hi-Cap Evap Enhanced 1/2 5168 73.75 Internally Finned
Condenser Enhanced 25 mm 1240 134 Microchannel
105 EvaporatorInternally 
Finned 1/2 4 168 73.75 Internally Finned
Hi-Cap Evap Internally 
Finned 1/2 6 168 73.75 Internally Finned
Condenser Enhanced 25 mm 1 240 161 Microchannel
120 Evaporator Internally 
Finned 1/2 3 168 106.25 Internally Finned
Hi-Cap Evap Internally 
Finned 1/2 6 168 106.25 Internally Finned
Condenser Enhanced 18 mm 2 276 161 Microchannel
130Evaporator Internally 
Finned 1/2 4 168 106.25 Internally Finned
Hi-Cap Evap Internally 
Finned 1/2 6 168 106.25 Internally Finned
Condenser Enhanced 18 mm 2 276 161 Microchannel
150Evaporator Internally 
Finned 1/2 6 168 106.25 Internally Finned
Condenser Smooth 18 mm 2 276 161 Microchannel
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by Trane
or others, refer to the appropriate manufacturer’s
literature for allowable waiting periods for discharge of
capacitors. Verify with an appropriate voltmeter that all
capacitors have discharged. Failure to disconnect
power and discharge capacitors before servicing could
result in death or serious injury.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN 
						

							Service and Maintenance
182RT-SVX24K-EN
2. Set the large O-ring on the belt tension gauge at the
deflection value determined in Step 1b.
3. Set the small O-ring at zero on the force scale of the g
 auge plunger.
4. Place the large end of the gauge at the center of the belt span;
 then depress the gauge plunger until the large O-
ring is even with the top of the next belt—-or even with
a straightedge placed across the fan and motor
sheaves. See Table59, p. 183.
5. Remove the belt tension gauge. The small O-ring now indicates
 a number other than zero on the plunger’s
force scale. This number represents the force (in
pounds) required to give the needed deflection.
6. Compare the “force” scale reading (Step 5) with the appropriate
 “force” value listed in Table59, p. 183.If
the “force ”reading
 is outside the range, readjust the
belt tension.
Note: Actual
 belt deflection “force” must not exceed the
maximum “force” value shown in Table 59, p. 183.
7. Recheck the belt tension at least twice during the first 2
 to 3 days of operation. Belt tension will decrease
rapidly until the new belts are “run in”.
Figure 121.Tension GaugeFigure 122.Belt Tension 
						

							Service and Maintenance
RT-SVX24K-EN183
Scroll Compressor Replacement
The compressor manifold system was purposely designed
to provide proper oil return to each compressors. The
refrigerant manifold system must not be modified in any
way.
Note: Altering the compressor manifold piping may
cause oil return problems and compressor failure.
Should a compressor replacement become necessary and
a suction line filter drier is to be installed, install it a
minimum of 18 inches upstream of the oil separator tee.
See Figure 123, p. 183.
Anytime a compressor is replaced, the oil for each compressor within the manifolded set must be replaced.
The scroll compressor uses Trane OIL00079 (one quart container) or OIL00080 (one gallon container) without
substitution. The appropriate oil charge for CSHN250 and
CSHN315 scroll compressors is 14.2 pints. For CSHN374
scroll compressor, use 15.2 pints.
The recommended method for evacuation and dehydration is to evacuate both the high side and the low
side to 500 microns or less. To establish that the unit is
leak-free, use a standing vacuum test. The maximum
allowable rise over a 15 minute period is 200 microns. If
the rise exceeds this, there is either still moisture in the
system or a leak is present. Note:
Do Not release refrigerant to the atmosphere! If
adding or removing refrigerant is required, the
service technician must comply with all Federal,
State and local laws.
Table 59. Belt Tension Measurement and Deflection Ranges
Belt 
Cross 
Section Smallest 
Sheave 
Diameter 
Range (In.) RPM Range Belt Deflection Force (Lbs.)
Super Gripbelts and 
Unnotched Gripbands Gripnotch Belts and 
Notched Gripbands
Min. Max. Min. Max.
A, AX
3.0-3.6 1000-2500 3.7 5.54.1 6.1
3.8-4.8 1000-2500 4.5 6.85.0 7.4
5.0-7.0 1000-2500 5.4 8.05.7 8.4
B, BX3.4 – 4.2 860-2500 ----4.9 7.2
4.4 – 5.6 860-2500 5.37.97.110.5
5.8 – 8.6 860-2500 6.39.48.512.6
3V, 3VX2.2 - 2.4 1000-2500 ----3.3 4.9
2.65 - 3.65 1000-2500 3.6 5.14.2 6.2
4.12 - 6.90 1000-2500 4.9 7.35.3 7.9
5V, 5VX4.4 – 6.7500-1749
1750-3000 -- -- 10.2
8.8 15.2
13.2
7.1 –10.9 500-1740 12.7 18.9 14.8 22.1
11.8-16.0 500-1740 15.5 23.417.125.5
Figure 123.Suction Line Filter/Drier Installation
Sight glass
Suction servicevalve Replaceable core
drier
Note: These components are also located at circuit #1 side 
						

							Service and Maintenance
184RT-SVX24K-EN
VFD Programming Parameters
Units shipped with an optional variable frequency drive
(VFD) are preset and run tested at the factory. If a problem
with a VFD occurs, ensure that the programmed
parameters listed inTable 60, p. 185have been set before
replacing the drive.
Note: Check to make sure that parameter 1-23 is set to 60
Hz.To check parameter 1-23 press the [Main Menu]
button (press [Back] button if the main menu does
not display), use the [▼] button to scroll down to
Load & Motor, press OK, use the [▼] button to
select 1-2, press OK, and finally use the [▼] button
until parameter 1-23 is displayed. Parameter 1-23
can then be modified by pressing OK button and
using [▲] and [▼] buttons. When the desired
selection has been made, press the OK button.
Should replacing the VFD become necessary, the
replacement is not configured with all ofTranes operating
parameters. The VFD must be programmed before
attempting to operate the unit.
To verify and/or program a VFD, use the following steps: 1. At the unit, turn the 115 volt control circuit switch to the “Off” position.
2. Turn the 24 volt control circuit switch to the “Off position. HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK OR
UNIT

DISCONNECT SWITCH.
3. To modify parameters: a. Press Main Menu button (press [Back] button if themain
 menu does not display)
b. Use the [▲] and [▼] buttons to find the parameter menu group (first part of parameter number)
c. Press [OK]
d. Use the [▲] and [▼] buttons to select the correct parameter sub-group (first digit of second part of
parameter number)
e. Press [OK]
f. Use the [▲] and [▼] buttons to select the specific parameter
g. Press [OK]
h. To move to a different digit within a parameter setting, use the [ ►◄] buttons (Highlighted area
indicates digit selected for change)
i. Use the [▲] and [▼] buttons to adjust the digit
j. Press [Cancel] button to disregard change, or press [OK] to accept change and enter the new setting
4. Repeat step (3) for each menu selection setting in Table 60, p. 185.
5. To reset all programming parameters back to the factory
 defaults:
a. Go to parameter 14-22 Operation Mode
b. Press [OK]
c. Select “Initialization”
d. Press [OK]
e. Cut off the mains supply and wait until the displayturns off.
f. Reconnect the mains supply - the frequency converter is now reset.
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by Trane
or others, refer to the appropriate manufacturer’s
literature for allowable waiting periods for discharge of
capacitors. Verify with an appropriate voltmeter that all
capacitors have discharged. Failure to disconnect power
and discharge capacitors before servicing could result
in death or serious injury.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by Trane
or others, refer to the appropriate manufacturer’s
literature for allowable waiting periods for discharge of
capacitors. Verify with an appropriate voltmeter that all
capacitors have discharged. Failure to disconnect
power and discharge capacitors before servicing could
result in death or serious injury.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN 
						

							Service and Maintenance
RT-SVX24K-EN185
g. Ensure parameter 14-22 Operation Mode has
reverted back to “Normal Operation”.
Notes:
 Item 5 resets the drive to the default factory settings.
The program parameters listed in Table 60, p. 185will
need to be verified or changed as described in Item 3
and 4.
 Some of the parameters listed in the Table are motor
specific. Due to various motors and efficiencies
available, use only the values stamped on the specific
motor nameplate. Do not use the Unit nameplate
values.
 A backup copy of the current setup may be saved to the
LCP before changing parameters or resetting the drive. See LCP Copy in the VFD Operating Instructions for
details.
6. Follow the startup procedures for supply fan in the
“Variable Air Volume System” section or the
“Exhaust Airflow Measurement” startup proceduresfor the exhaust fan.
7. After verifying that the VFD(s) are operating properly
 , press the STOP key at the Human Interface
Module to stop the unit operation.
8. Follow the applicable steps in the “Final Unit Chec
 kout” section to return the unit to its normal
operating mode.
Note: If
a problem with a VFD occurs, ensure that the
programmed parameters listed for supply and
exhaust VFD Table 60, p. 185 andTable 61, p. 190
have been set before replacing the drive.
Monthly Maintenance
Before completing the following checks, turn the unit OFF
and lock the main power disconnect switch open.
Filters
Inspect the return air filters. Clean or replace them if
necessary. Refer to Table 55, p. 179andTable 56, p. 180 for
filter information.
Cooling Season
 [ ] Check the unit drain pans and condensate piping to ensure that there are no blockages.
 [ ] Inspect the evaporator and condenser coils for dirt, bent
 fins, etc. If the coils appear dirty, clean them
according to the instructions described in “Coil
Cleaning” later in this section.
 [ ] Manually rotate the condenser fans to ensure free movement and check motor bearings for wear. Verify
that all of the fan mounting hardware is tight.
 [ ] Inspect the F/A-R/A damper hinges and pins to ensure
 that all moving parts are securely mounted.
Keep the blades clean as necessary.
Table 60. Supply and Exhaust VFD Programming Parameters
Menu Parameter Description
SettingDescription
Load & Motor 1-21 Motor Power Set Based on Motor Nameplate  Set only for application using 3hp motors. 
Set to 2.2 kW/3 hp
1-22 Motor Voltage Set Based on Motor Nameplate Set only for 380/415 50 Hz applications
1-24 Motor Current Set Based on Motor Nameplate Sets the motor FLA
1-25 Motor Speed Set Based on Motor Nameplate Sets the motor RPM 
Limits & Warnings 4-18 Current Limit Rated Current 100% Limits the maximum current to motor
Notes:  1. These parameters are motor specific and the actual motor nameplate rating must be used. Do not use the unit nameplate.
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by Trane
or others, refer to the appropriate manufacturer’s
literature for allowable waiting periods for discharge of
capacitors. Verify with an appropriate voltmeter that all
capacitors have discharged. Failure to disconnect
power and discharge capacitors before servicing could
result in death or serious injury.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN
WARNING
Rotating Components!
During installation, testing, servicing and
troubleshooting of this product it may be necessary to
work with live and exposed rotating components. Have
a qualified or licensed service individual who has been
properly trained in handling exposed rotating
components, perform these tasks. Failure to follow all
safety precautions could result in rotating components
cutting and slashing technician which could result in
death or serious injury. 
						

							Service and Maintenance
186RT-SVX24K-EN
 [ ] Verify that all damper linkages move freely; lubricate
with white grease, if necessary.
 [ ] Check supply fan motor bearings; repair or replace the
 motor as necessary.
 [ ] Check the fan shaft bearings for wear. Replace the bearings
 as necessary.
 [ ] Lubricate the supply fan shaft bearings with a lithium based
 grease. Refer to Table57, p.181for
recommended greases.
Note: The
 bearings are manufactured using a special
synthetic lithium based grease designed for long
life and minimum lube intervals. Over lubrication
can be just as harmful as not enough.
Use a hand grease gun to lubricate these bearings; add
grease until a light bead appears all around the seal. Do
not over lubricate!
After greasing the bearings, check the setscrews to ensure that the shaft is held securely to the bearings and fan
wheels. Make sure that all bearing supports are tight.
 [ ] Check the supply fan belt(s). If the belts are frayed or worn,
 replace them. Refer to the “Fan Belt
Adjustment” section for belt replacement and adjustments.
 [ ] Check the condition of the gasket around the control panel
 doors.These gaskets must fit correctly and be in
good condition to prevent water leakage.
 [ ] Verify that all wire terminal connections are tight.
 [ ] Remove any corrosion present on the exterior surfaces
 of the unit and repaint these areas.
 [ ] Generally inspect the unit for unusual conditions (e.g.,
 loose access panels, leaking piping connections,
etc.)
 [ ] Make sure that all retaining screws are reinstalled in the
 unit access panels once these checks are complete.
 [ ] With the unit running, check and record the: ambient temperature;
compressor
 oil level (each circuit);
compressor suction and discharge pressures (each
circuit);
superheat and subcooling (each circuit);
Record this data on an “operator’s maintenance log” like
the one shown in Table 63, p. 191. If the operating
pressures indicate a refrigerant shortage, measure the
system superheat and system subcooling. For guidelines,
refer to “Charging by Subcooling”.
Note: Do Not release refrigerant to the atmosphere! If
adding or removing refrigerant is required, the
service technician must comply with all federal,
state and local laws.
Heating Season
Before completing the following checks, turn the unit OFF
and lock the main power disconnect switch open.
 Inspect the unit air filters. If necessary, clean or replace
them.
 Check supply fan motor bearings; repair or replace the motor
 as necessary.
 Lubricate the supply fan shaft bearings with a lithium based
 grease. Refer to Table57, p.181for
recommended greases.
Note: The
 bearings are manufactured using a special
synthetic lithium based grease designed for long
life and minimum lube intervals. Too much
lubrication in a bearing can be just as harmful as
not enough.
Use a hand grease gun to lubricate the bearings; add
grease until a light bead appears all around the seal. Do
not over lubricate!
After greasing the bearings, check the setscrews to ensure that the shaft is held securely. Make sure that all bearing
braces are tight.
 [ ] Inspect both the main unit control panel and heat section
 control box for loose electrical components
and terminal connections, as well as damaged wire
insulation. Make any necessary repairs.
 [ ] Gas Heat Units only - Check the heat exchanger for an
 y corrosion, cracks, or holes.
 [ ] Check the combustion air blower for dirt. Clean as necessary
 .
Note:Typically, it is not necessary to clean the gas
furnace. However, if cleaning does become
necessary, remove the burner inspection plate
from the rear of the heat exchanger to access the
drum. Be sure to replace the existing gaskets with
new ones before reinstalling the inspection plate.
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by Trane
or others, refer to the appropriate manufacturer’s
literature for allowable waiting periods for discharge of
capacitors. Verify with an appropriate voltmeter that all
capacitors have discharged. Failure to disconnect
power and discharge capacitors before servicing could
result in death or serious injury.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN 
						

							Service and Maintenance
RT-SVX24K-EN187
 [ ] Open the main gas valve and apply power to the unit
heating section; then initiate a “Heat” test using the
startup procedure described in “Gas Furnace Startup”.
 [ ] Verify that the ignition system operates properly.
Air-Cooled Coil Cleaning
Regular coil maintenance, including annual cleaning
enhances the unit operating efficiency by minimizing:
– compressor head pressure and amperage draw;
– water carryover;
– fan brake horsepower; and,
– static pressure losses
At least once each year—or more often if the unit is located in a “dirty” environment—clean the evaporator and
Microchannel Condenser Coil and Hot Gas Reheat Coil
using the instructions outlined below. Follow these
instructions as closely as possible to avoid damaging the
coils.
Refrigerant Coils
To clean refrigerant coils, use a soft brush and a sprayer.
Important: DO NOT use any detergents with
microchannel condenser coils. Pressurized
water or air ONLY.
For evaporator and reheat coil cleaners, contact the local
Trane Parts Center for appropriate detergents.
1. Remove enough panels from the unit to gain safe access to coils.
Important: Bridging between the main supports
required before attempting to enter into the
unit. Bridging may consist of multiple 2 by
12 boards or sheet metal grating.
2. Straighten any bent coil fins with a fin comb.
3. For accessible areas, remove loose dirt and debris from
 both sides of the coil. For dual row microchannel
condenser coil applications, seek pressure coil wand
extension through the local Trane Parts Center.
4. When cleaning evaporator and reheat coils, mix the detergent
 with water according to the manufacturer’s
instructions. If desired, heat the solution to 150° F
maximum to improve its cleansing capability.
Important: DO
 NOT use any detergents with
microchannel coils. Pressurized water or air
ONLY.
5. Pour the cleaning solution into the sprayer. If a high- pressure
 sprayer is used:
a. The minimum nozzle spray angle is 15 degrees.
b. Do not allow sprayer pressure to exceed 600 psi.
WARNING
Hazardous Gases and Flammable Vapors!
Exposure to hazardous gases from fuel substances
have been shown to cause cancer, birth defects or other
reproductive harm. Improper installation, adjustment,
alteration, service or use of this product could cause
flammable mixtures or lead to excessive carbon
monoxide. To avoid hazardous gases and flammable
vapors follow proper installation and set up of this
product and all warnings as provided in this manual.
Failure to follow all instructions could result in death or
serious injury.
WARNING
Hazardous Pressures!
When using dry nitrogen cylinders for pressurizing units for leak testing, always provide a pressure
regulator on the cylinder to prevent excessively high
unit pressures. Never pressurize unit above the
maximum recommended unit test pressure as specified
in applicable unit literature. Failure to properly regulate
pressure could result in a violent explosion, which
could result in death or serious injury or equipment or
property-only-damage.
WARNING
Hazardous Chemicals!
Coil cleaning agents can be either acidic or highly
alkaline and can burn severely if contact with skin
occurs. Handle chemical carefully and avoid contact
with skin. ALWAYS wear Personal Protective
Equipment (PPE) including goggles or face shield,
chemical resistant gloves, boots, apron or suit as
required. For personal safety refer to the cleaning agent
manufacturer’s Materials Safety Data Sheet and follow
all recommended safe handling practices. Failure to
follow all safety instructions could result in death or
serious injury.
WARNING
No Step Surface!
Do not walk on the sheet metal base. Walking on the
base could cause the supporting metal to collapse,
resulting in the operator/technician to fall. Failure to
follow this recommendation could result in death or
serious injury. 
						

							Service and Maintenance
188RT-SVX24K-EN
c. Spray the solution perpendicular (at 90 degrees) to
the coil face.
d. For evaporator and reheat coils, maintain a minimum clearance of 6 between the sprayer
nozzle and the coil. For microchannel condenser
coils, optimum clearance between the sprayer
nozzle and the microchannel coil is 1-3”.
6. Spray the leaving-airflow side of the coil first; then spray the opposite side of the coil. For evaporator and
reheat coils, allow the cleaning solution to stand on the
coil for five minutes.
7. Rinse both sides of the coil with cool, clean water.
8. Inspect both sides of the coil; if it still appears to be dir
 ty, repeat Steps 6 and 7.
9. Reinstall all of the components and panels removed in Step
 1; then restore power to the unit.
10. For evaporator and reheat coils, use a fin comb to straighten
 any coil fins which were inadvertently bent
during the cleaning process.
Steam or Hot Water Coils
To clean a steam or hot water coil, use a soft brush, a steam-cleaning machine, and water.
1. Verify that switches 1S1 and 1S70 are turned “OFF”,
 and
that the main unit disconnect is locked open.
2. Remove enough panels and components from the unit to gain sufficient access to the coil.
3. Straighten any bent coil fins with a fin comb. (Use the data
 inTable 58, p.181to determine the appropriate fin
comb size.)
4. Remove loose dirt and debris from both sides of the coil
 with a soft brush.
5. Use the steam-cleaning machine to clean the leaving- air
 side of the coil first; start at the top of the coil and
work downward; then clean the entering-air side of the
coil, starting at the top of the coil and working
downward.
6. Check both sides of the coil; if it still appears dirty, repeat
 Step 5.
7. Reinstall all of the components and panels removed in Step
 2; then restore power to the unit.
Evaporative Condenser Coil Cleaning
Sump Water Management
Water Supply
Overall performance of any water- cooled device can be
affected by suspended particulates, mineral
concentration, trash and debris resulting in clogging and
heat transfer loss.The unit is designed to greatly minimize
problems with these impurities, however, float valves and
solenoid valves are used to control the incoming water.
If the incoming water contains contaminants, sand or
other objects, it is best to insert an incoming line strainer
having a mesh of 80 to 100.The inlet line should be flushed
prior to connection to the unit, whether or not there is a
strainer.
There is an air gap between the water inlet float valve and sump water level to prevent back flow; however, if local
code dictates, a backflow prevention valve may be
required (field-provided and installed by a qualified
technician).
Water Drain
Local Site Discharge: Rooftop or simple storm sewer
discharge is generally acceptable. Do not routinely direct
the sump discharge onto an area that will be adversely
affected. For example, continued sump discharge into a
flower bed where the input water contains CaCO3 (lime)
will eventually decrease the pH of the soil.
Sewer Discharge: The quantities of mineral and debris
flushed are actually very small and do not cause problems
when diluted in normal sewer flow. However, local, state
or federal standards and restrictions must be followed in
any given locality.
Traditional Bleed Method
ASHRAE recommendation for continuous bleed rates:
With good, quality makeup water, the bleed rates (0.8 - 2 GPH/ton) may be as low as one-half the evaporation rate
(1.6 -2 GPH), and the total water consumption would range
from 2.4 GPH/ton for air conditioning to 3 GPH/ton for
refrigeration (Chapter 36.17 of ASHRAEs “Systems and
Equipment Handbook”)
Operation and Care
The sump should be inspected at least every 6 months for possible build up of scale pieces that has been shed from
the coils. The sump flush frequency or bleed rate should
be increased if large amounts of scale are present.
If the water has a “milky or cloudy” appearance, then
minerals are concentrating in the sump and the number of
flushes should be increased.
If the water remains clear between flushes, then the
number of flushes can be decreased. Through field trials,
the optimum flush frequency can be determined. Please
note that in some areas, water quality can vary during
WARNING
No Step Surface!
Do not walk on the sheet metal drain pan. Walking on
the drain pan could cause the supporting metal to
collapse, resulting in the operator/technician to fall.
Failure to follow this recommendation could result in
death or serious injury. 
						

							Service and Maintenance
RT-SVX24K-EN189
different times of the year. The sump water clarity should
be checked periodically.
The evaporative condenser has several design features to reduce the possibility of biological growth in the sump.
These features include:
 air inlets constructed to eliminate direct sunlight in the sump
 The sump flush sequence replenishes the sump with fresh
 water 1 to 12 times per day depending on the
flush setting
 The copper tubing in the coils is a natural biocide
Important: Do
 not use chlorine tablets directly on
stainless steel surface as it can adversely
affect its corrosion resistance.
Always consult local codes for water treatment and waste water removal requirements. Consult a water treatment
expert for water analysis and chemical treatment methods
and recommendations for specific applications.
If deemed necessary after consultation with local water
experts, there are various means of water treatment
available which can be field installed.
Microchannel Condenser Coil Repair and
Replacement
If microchannel condenser coil repair or replacement is
required, seek HVAC Knowledge Center information or
Service Guide document RT-SVB83*-EN for further details. 
						

							Service and Maintenance
19 0RT-SVX24K-EN
Final Process
Record the unit data in the blanks provided.
Table 61. Evaporative Condenser Models—Maintenance and Troubleshooting
 Maintenance Schedule 
 Component   Action   Frequency   Comments 
Fan Motor  None Required    Non-grease bearings 
Sump Pump  Inspect / Clean   1 – 2 times per year Clean inlet openings to pump
Sump  Inspect / Clean  1 – 2 times per year depending 
on water hardness and unit run  time  Sump can be drained and hosed out using hose bib 
provided at water fill solenoid valve. Vacuuming scale out  is an alternate method 
Sump Float Switch  Inspect 1 – 2 times per year  Float should be free for full float travel
Sump Float Make Up  Valve  Inspect for proper water 
level  1 – 2 times per year 
 
Spray Nozzles  Inspect / Clean  1 – 2 times per year Inspection through access panel
Conductivity Sensor Inspect / Clean 1 – 2 times per year Clean sensor to ensure accurate readings
Conductivity Controller Inspect / Recalibrate 1 – 2 times per year  Recalibrate controller
 Troubleshooting 
 Component   Problem   Check   Fix 
Fan Motor  Does not run Condenser Fan Relay closure and 
control voltage indicating a call from compressor control panel 
for the condenser fan to operate.  Sump Pump Overload Trip. Fan  Motor Overload Trip. Fan fuse  trip. Check each motor overload and reset if necessary. 
Check amp draw for each leg. 
Sump Pump  Does not run Sump Pump Overload Trip Low 
Water Level or faulty float switch. Unit in ‘Dry Mode’  Operation  Reset – check amps on each leg to determine if faulty motor. 
Check and clean debris around float switch. Check Ambient  thermostat setting and mode of operation (close on rise).  See section 2 for T’stat setup instructions. 
Sump Pump  Low Flow Pump may be operating 
backwards or impeller inlet may  be slightly blocked.  Change pumping direction by changing any two legs to the 
pump motor. Disconnect Power and remove pump to inspect  for possible impeller obstruction. 
Spray Nozzle  Dry area on coil  Check for proper spray pattern 
over each quadrant.  Remove debris from clogged nozzle. 
Table 62. Unit Data Log
Complete Unit Model Number:
Unit Serial Number:
Unit “DL” Number (“design special” units only):
Wiring Diagram Numbers (from unit control panel): 
-schematic(s)
-connections
Network ID (LCI/BCI):