Instruction Manual

9
4.6 PULSAlarm Leak Detection Electrical Connections
Figure 9
If equipped with an optional vacuum or pressure switch, install electrical wiring and conduit in
accordance with local electrical codes.
The switch is rated as follows:
30 VDC or 125 VAC 1 Ampere Resistive.
The switch is the SPDT (single pole, double throw) type and can therefore be connected to either open
or to close upon detection of diaphragm leak condition. Contacts or wires are identified as follows:
Normally Open (NO) wire color WHITE
Normally Closed (NC) wire color RED
Common (Com) wire color BLACK
THE ENCLOSURE IS LABELED WITH APPLICABLE SAFETY AGENCY RATINGS FOR HAZARDOUS
AREA INSTALLATION
. SINCE THE SWITCH IS OF THE MECHANICAL CONTACT TYPE, IT CAN
NEVER QUALIFY AS NON
-SPARKING (NON-INCENDIVE, OR “M”) FOR OCCASIONAL AND SHORT-
TERM HAZARDOUS AREA USE. PROTECTION MUST BE PROVIDED BY THE ENCLOSURE.
Pressure
Gauge