98 RT-SVX36G-EN
Unit Start Up
solenoid valve closed. If the minimum water level switch opens during a blowdown cycle, the unit
will de-energize the sump pump in order to protect the compressors and sump heater from
insufficient water levels. Once the water level reaches the minimum level input and this input closes
for 10 seconds, the compressors and sump heater operations will be allowed to restart.
Evaporative Condenser Drain Valve Setup
The drain valve is shipped to “Drain During Unit Power Loss Conditions.” This means that when
the unit disconnect is turned off, the 1S2 toggle switch is turned off, or the unit loses power, the
drain will open. The valve is spring loaded and will travel from fully closed to fully open in
approximately 25 seconds.
This is desirable in cold climates where a risk of freezing exists. In milder climates it may be
desirable to keep the water in the sump when unit power is off to avoid unnecessarily wasting water
whenever the unit disconnect is turned off.
To convert the unit to “Hold During Unit Power Loss Conditions”:
1. Remove powe r from the unit.
2. Remove the weather shield cover (Figure 44, p. 98).
3. Loosen the shaft set screw (Figure 44), remove the locking clip, and remove the shaft adapter
(Figure 45, p. 99).
4. Lift the drain valve actuator and rotate it to the “hold during power loss” position (Figure 46,
p. 99).
5. Reinstall the shaft adapter and locking clip and reinstall the actuator onto the base. Make sure
the arrow on the shaft adapter is set to 0°.
6. Make sure the valve is in the fully closed position, then tighten the shaft set screw.
7. Reinstall the weather shield cover.
8. Restore power to the unit.
9. At the Human Interface, press SETUP, NEXT until 'Head Pressure Control Setup Submenu” is
seen. Press ENTER.
10. Change the “Sump Drain Valve Relay Control” from Drain to Hold
Figure 44. Drain valve actuator with weather shield
Weather Shield
Shaft Set Screw
Drain Valve Actuator
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