QUANTUM™ LX EVAPORATOR CONTROL PANEL
OPERATION
090.610-O (MAR 2016)
Page 46
SETPOINTS – Heating Timers
DESCRIPTION: This screen allows for the setup of the Heating
Timers, as they apply to Heating Modes 1, 2, 3 and 4.
Pre-Heat:
• Pump Out - The time in minutes to pump out
the liquid in the coils. During this step, the liquid
and hot gas valves are closed, the suction valve
is opened, and the fans are running. The fan runs
according to the fan settings that were entered
on the “Heating Setpoints” screen. If it is a two-
speed fan, the selected fan speed is energized. If
it is a variable speed fan, the fan is turned on the
amount of the variable percent.
• Pump Out Fan Speed – The speed setting of the
fan while it is running during pump out.
• Soft Hot Gas - The time in minutes to provide
soft hot gas heating of the coils. During this
step, the soft hot gas valve is opened, the other
valves are closed, and the fans are stopped. -
(enhanced unit only).
• Fan Delay - The time in minutes to provide hot
gas heating of the coils without fans running.
During this step the hot gas valves are opened, the
other valves are closed, and the fans are stopped.
Post-Heat:
• Bleed - The time in minutes to bleed (bleed valve
is opened). During this step, all other valves are
closed, and the fans are not running.
• Fan Delay - The time in minutes to delay after
heating, prior to starting the fans and the cool-
ing process. This is the last step of the sequence.
This step is important for preventing liquid from
being blown off the evaporator coils and into the
room. Opening the liquid valve will start frosting
the evaporator coils. During this step the liquid
and suction valves are opened. The soft hot gas,
hot gas, and bleed valves are closed, and the
fans are not running.
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