Trane IntelliPak Installation, Operation And Maintenance Manual page 181

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 others).
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 ASHRAE's "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
Table 79. Evaporative Condenser Models—Maintenance and Troubleshooting
Component
Fan Motor None Required
Sump Pump Inspect/Clean
Sump Inspect/Clean
Sump Float Switch
Sump Float Inspect for proper
Make Up Valve
Spray Nozzles Inspect/Clean
Conductivity Sensor Inspect/Clean
Conductivity Controller Inspect/Recalibrate
Component
Fan Motor Does not run
RT-SVX36K-EN
Maintenance Schedule
Action
1 – 2 times per year depending on water
hardness and unit run time
Inspect
water level
Problem
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
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
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
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.
Frequency
1 – 2 times per year
1 – 2 times per year
1 – 2 times per year
1 – 2 times per year
1 – 2 times per year
1 – 2 times per year
Troubleshooting
Check
trip.
stainless steel surface as it can adversely
affect its corrosion resistance.
Comments
Non-grease bearings
Clean inlet openings to pump
Sump can be drained and hosed out using hose
bib provided at water fill solenoid valve.
Vacuuming scale out is an alternate method.
Float should be free for full float travel
Inspection through access panel
Clean sensor to ensure accurate readings
Recalibrate controller
Fix
Check each motor overload and reset if
necessary. Check amp draw for each leg.
Maintenance
181