37
Fig. 60 — 62X Sequence of Operations Flow Chart, Dehumidification Mode
NO
IS SYSTEM
IN ALARM OR
SHUTDOWN?
Compressor #2 takes over
for Compressor #1.
Clear condion and reset
alarm in Equipment
Touch.
See IOM For more
informaon.
YES
NO
IS
COMPRESSOR #2
INCLUDED?
YES
COMPRESSOR #1
TURNS ON.
NO
IS SYSTEM
IN ALARM OR
SHUTDOWN?
Clear condion and reset
alarm in Equipment
Touch. See IOM For more
informaon.
YES
Y2 TURNS ON
COMPRESSOR #2
TURNS ON.
IS THERE A
DEMAND FOR
2
ND
STAGE
DEHUMIDIFICATION?
Y1 TURNS ON
If Compressor #2 is included and on due
to Compressor #1 Alarm Condion which has
now been cleared, Compressor #2 will turn off,
subject to minimum run me.
IS HGRH
INCLUDED?
YES
IS THERE A CALL
FOR HGRH?
YES
IS HGRH
MODULATING?
YES
NO
HGRH TURNS ON.
HGRH TURNS ON AND MDV
MODULATES TO MAINTAIN
LAT COOLING SET POINT.
IS HGRH
INCLUDED ON BOTH
CIRCUITS?
YES
DCM WILL RAMP
UP TO 100%
IS
COMPRESSOR #1
DIGITAL?
YES
NO
COMPRESSORS ARE SUBJECT TO A 4-MINUTE
MINIMUM RUN-TIME WHICH INITIATES WHEN
THE COMPRESSOR TURNS ON.
COMPRESSORS ARE SUBJECT TO A 5-MINUTE
MINIMUM TIME OFF WHICH INITIATES WHEN
THE COMPRESSOR TURNS OFF.
5 MINUTE DELAY
FIXED
First me only upon
start-up of controller.
YES
FROM FIG. 58
