USER MANUAL
Series HC
Reference No. 145 Final Rev 5
Page 30
September 2004
3.3
PROGRAM STEPS:
(Continued)
6
240 min.
If the dewpoint rises above the analyzer set-point or the
Dewpoint/ +stdby Timer selector switch is on Timer then;
De-energize SV5-1;
Closes V13
De-energize SV1-1
Energize SV1-2
Opens V4, 5, 7 & 10
Closes V3, 6, 8 & 9
“Right Tower Onstream”
Start time delay of 60 seconds;
When time delay times out if pressure switch PS2 is greater than 10
“Fail to Shift” alarm
7
242 min.
De-energize SV2-2
Energize SV2-1;
Opens V1 & 15
Closes V2
“Heating Left Tower
8
330 min.
De-energize SV2-1
Energize SV2-2;
Opens V2
Closes V1 & 15
Energize SV4-1;
Opens V12
Energize SV3-1;
Opens V11
“Stripping Left Tower”
9
420 min.
De-energize SV4-1;
Closes V12
“Re-pressurizing Left Tower”
When PS3 reaches setpoint of 60 PSI then,
Energize SV5-1;
Opens V13
“Cooling Left Tower”
10
480 min.
If dewpoint is below the analyzer set-point and the Dewpoint/Timer
selector switch is on Dewpoint then;
Begin standby
“Standby”
