Ventilation; Logic; Alarms - ProMinent DULCOMETER PH-501 Assembly And Operating Instructions Manual

5.2.3.2 Alarms

Alarm Alarm Description
TALL-7911 Temperature Alarm Low Low
TALL-7941 Temperature Alarm Low Low
TALL-7961 Low Low Temp Aalrm

5.2.4 Ventilation

A single fan (F-7963) located in the MBR Process container acts to exhaust the container during
the warmer months. Temperature is monitored by the temperature sensor and a high setpoint
turns the exhaust fan on. There are also exhaust blowers to de-rate classified areas.

5.2.4.1 Logic

Tag / Mode Description
Ventilation
B-7911
Blower
Aeration Exhaust
B-7941
Blower
F-7963 Building Fan
5.2.4.2 Alarms
Alarm Alarm Description
PAL-7911 Pressure Alarm Low
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Actuation Control
TSLL-7911 = Active
TSLL-7941 = Active
LSLL-7961 = Active
Control Logic
The continuous ventilation blower will always be ON.
This blower is used as means to de-rate the screen
building to a Class 1 Division 2 area. Air exchanges must
be a minimum of 12 per hour,
On when B-501/502 is on OR B-601/602 is on
Always on controlled by Wall Mount Termostat
Actuation
Control
PSL-7911 =
InActive
1291 California Avenue, Brockville, ON K6V 5W3
Delay Resetting
5s
5s
Output
Type
Direct (not
PLC controled)
Discrete
Direct (not
PLC controled)
Self
Delay Resetting
(Y)
Alarm indicates possible
continuous ventilation
5s Y failure, indicating risk that
the room may become
Class 1 Division 1 rated.
newterra ltd.
(800) 420-4056 / www.newterra.com
Self
(Y)
Y
Y
HOA
Control
Auto
Notes
44