Desert Aire SelectAire Plus SP Series, Installation And Operation Manual

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Desert Aire - SP Manual
bubbles indicate a shortage of refrigerant or a restriction in the liquid line such as a plugged drier.
- Oil: When a system is circulating an excessive amount of oil, the See-All indicator paper may
become saturated. This causes the indicator to appear brown or translucent and lose its ability to
change color, but does not permanently damage the See-All. Let the See-All remain in the system.
The circulating refrigerant will remove the excess oil, and the indicator element will return to its
proper color.
2.18 Crankcase Heaters, Heat Tape, GFI Outlets and Lighting
2.18.1 Crankcase Heaters and Heat Tape
The power source to the SP unit should be installed and energized for a minimum of 24 Hours before
starting the compressors. This allows the heaters to properly heat the compressor, water and
condensate lines to warm to the required temperature for operation. Heat tape is used on condensate
and waterlines in outdoor applications.
2.18.2 GFI Outlets and Lights
There are two configurations for the installation of GFI Outlets. Either the GFI outlet receptacles will
be powered by a dedicated 120V circuit or powered by the dehumidifier circuit (optional) using a
dedicated transformer.
2.18.2.1 Dedicated 120V AC Powered Lights, GFI, and Receptacle (Standard)
In a standard configuration dehumidifier 120 VAC power will be supplied to the
dehumidifier’s panel by others. A separate terminal is available for this connection. It
will be necessary to take precautions when powering up and when powering the unit
down that the separate source must be considered.
2.18.2.2 GFI and Lights Powered by the Dehumidifier (Optional)
If your unit was ordered with the option to power the receptacles, lights and heat tape
by the dehumidifier the main disconnect will turn the power on and off to both the
primary circuit (i.e. 208/230V, 460V, or 575V) as well as to the 120 VAC circuit.
2.18.3 Receptacle for Gas Heat Trap Heat Tape (Outdoor Units Only)
When an outdoor rated unit is equipped with the gas heating option, a receptacle is included in the
gas heating section vestibule. This will allow for installation of customer supplied heat tracing on the
condensate lines if necessary. The receptacle is on the same circuit as the GFI Outlet and lights. This
receptacle is powered by a separate 120V field-supplied circuit, or optionally, an integral transformer.
After connection has been completed, the power at this receptacle should be tested to ensure it is
receiving power.