Bell & Gossett 176R0649C Technologic 502 Series Pump Controller - Manual (Page 45)

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39-63 High Suction Cut-Out
Pressure
0.0 Depends on
P3965
0.0 If a Suction Pressure source is selected
in P39-65 then this parameter sets the
pressure above which the timer in P39-
62 is started. If the timer expires while
the suction pressure remains above
this value then the pumps are not
needed and are shut off.
39-64 High Suction Reset
Pressure
0.0 Depends on
P3965
0.0 If the pumps have been shut off due
to High Suction Pressure and if the
pressure drops below this point then
the first pump will be turned on.
39-65 Suction Pressure Source
- No function
- Analog input 54
- Analog input X30/11
- Analog input X30/12
This parameter tells the controller
which analog input is connected to the
suction pressure sensor. Input scaling
for the sensor is defined in parameter
group P06-xx.
39-69 Suction Pressure A display of the current Suction
Pressure.
39-7* PB Sys
Press
Feat.
39-70 High System Pressure
Level (Old Par. 774)
0.0 PSI 999999.0PSI 0.0 PSI If the pressure feedback signal
exceeds this value for the amount
of time set in parameter P39-71, the
controller will cause a system shutdown
and display ALARM, HIGH SYSTEM
PRESSURE. It will be necessary to
cycle power to the controller to reset
this alarm if P39-77 is set to Alarm Trip
Lock.
39-71 High System Pressure
Proof Time (Old Par. 775)
0s 999s 0s This determines the amount of time
that the system must have pressure
greater than the value set in parameter
P39-70 before it goes into an alarm
condition.
39-72 Low System Pressure Level 0.0 Depends on
P3965
0.0 If a System Pressure source is selected
in P39-75 then this parameter sets the
pressure below which the timer in P39-
73 is started. If the timer expires while
the system Pressure remains below
this value then the action defined in
P39-76 is performed.
39-73 Low System Pressure Proof
Time
0s 60s 0s This determines the amount of time
that the system pressure must be lower
than the value set in parameter P39-73
before it performs the action selected
by P39-76.
Table 6-2. Parameter 39-** Group, Detailed Description (continued)