Trane IntelliPak SAHL Series Installation, Operation And Maintenance Manual page 100

Unit Start Up
Chemical Water Treatment Tree
The Trane evaporative condenser comes with a PVC tree to
allow easier inputs for third party water treatment. The tee
labeled A is a ¾ inch NPT threaded input, see
B and C are 1/2 inch NPT threaded inputs. The ball valve can
be used to stop the water flow through the tree to allow the
customer to add hookup of water treatment, or to change and
update water treatment with the unit running.
Units with Dolphin WaterCare or conductivity sensor will have
the conductivity sensor installed into the ¾ inch tee with the
other tees plugged. For all other units, A, B and C will be
plugged, see
position when water treatment is being operated in the system
to make sure water flows through the tree and transports
treatment to the unit sump.
Conductivity Controller
Upon startup, the conductivity controller must be calibrated
and setup for operation. Below are the necessary steps to
accomplish those tasks. The controller has two setpoints that
control two relays. Both of these setpoints will need to be set
by Dolphin or a local water treatment expert.
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Procedure to calibrate conductivity
Note: Visit this webpage for additional documentation: <http://www.gfsignettools.com/products/
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Figure 47. Ensure the ball valve is in the open
The first setpoint is the standard point blowdown point.
– When the setpoint is exceeded the relay (K1) will be
energized and a blowdown request will close the Water
treatment request binary input on the MCM.
The second setpoint will be the emergency point
– The second setpoint will open the normally closed K2 relay which will interrupt the sump
proving circuit which will generate a manual lockout. This second setpoint will be used to
protect the unit from extremely high conductivity that would indicate a failure in the system.
Inside the enclosure for the controller, there will be a thermostat and strip heater that will
protect LCD from cracking at low ambient conditions. The thermostat closes at 15°F and opens
at 25°F .
pdf/8860eng.pdf>
Use a calibrated thermometer and a known conductivity rating
There are two different options for having a liquid with known conductivity
Purchase a liquid with known conductivity rating
Purchase a handheld conductivity reader
Close the ball valve on the chemical treatment tree and remove the conductivity sensor from
the tree
Enter service test mode on the unit and turn the pump on, ensuring the compressors are set
to Off
With the conductivity controller connected to the sensor and power, enter the CALIBRATE menu
by holding down the enter key for 2 seconds
When asked for the calibration key code, hit the UP-UP-UP-DOWN arrow keys in sequence
Figure 47. Chemical Water
Figure 47. Tees
Treatment Tree
A
B
C
RT-SVX36G-EN