Data Aire gForce Ultra Installation, Operation & Maintenance Manual page 86

gForce Ultra IOM
It is desirable to use the energy saver mode as much as possible. However, fluid temperature that is
too cold can cause excessive dehumidification and coil sweating. Fluid temperature that is too high can
also cause the indoor space temperature to rise. This could cause the evaporator's microprocessor
control to lock out the energy saver mode for one hour while it reverts to compressor (mechanical)
cooling. Adjust the set points of the thermostats to allow the maximum free cooling time. Over cooling
or under cooling the fluid should be avoided. Every application will have a different ambient temperature
and indoor heat load/air distribution profile. Therefore it is not possible to dictate the exact water-
sensing thermostat set points. Field adjustments are typical to allow fi ne-tuning to specific conditions.
With an Energy Saver coil, the condenser fan motor runs whenever there is a call for cooling via an
auxiliary signal sent by the indoor evaporator.
The water-sensing thermostats have adjustable set points which are typically staggered to maintain
water temperature in the 85° to 105°F (29.4° to 40.6°C) range. This is generally the desired range for
glycol cooled systems.
A surge tank is standard on all fluid coolers. This is enough on most applications; however, an
expansion tank should be installed at the highest point in the system and the point of least pressure.
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