TOTAL SYSTEM DESCRIPTION
2012-MAY-18 REV. 02 PAGE 1
CHECKFIRE MP-N Electric
Detection and Actuation System Manual
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TYPICAL SYSTEM
TOTAL SYSTEM DESCRIPTION
The fire detection/suppression package is designed and approved
for use in mining vehicles, including those that operate in an explo-
sive methane/air atmosphere.
The CHECKFIRE MP-N Electric Detection and Actuation System,
FM Approval No. 3036795, is a modified version of the FM
approved SC-N Electric Detection and Actuation System, FM
approval No. J.I.0B8A8. The modification has been done to meet
the intrinsically safe requirements of MSHA.
Modification includes the addition of intrinsically safe circuitry to
the battery assembly and the main control board.
Due to the inability to make intrinsically safe wiring connections,
trouble and alarm relay contacts normally provided with the
CHECKFIRE SC-N control module have been removed on the
CHECKFIRE MP-N control module.
The complete CHECKFIRE MP-N system is composed of compo-
nents which are combined to provide automatic fire detection and
actuation for equipment hazard areas. The electric detection and
actuation system is designed for use only with ANSUL fire
suppression systems requiring pneumatic input as a means of
actuation.
The CHECKFIRE MP-N system is typically used with an ANSUL
A-101 Vehicle Fire Suppression system for 24-hour protection of
equipment. The system is particularly suited for the protection of
mining equipment that is subjected to extreme environmental and
physical conditions.
Some of its features include linear (wire) and/or spot (thermal)
detection, supervised circuitry, internally powered, adjustable
shutdown and discharge time delays, and auxiliary shutdown
relay.
CHECKFIRE MP-N Electric Detection and Actuation System
consists of the following components:
1. Control Module
2. Manual/Automatic Actuator
3. Mounting Bracket
4. Detection Wire
5. Thermal Detectors
6. Pneumatic/Linear Detection
7. Gas Motor
8. LT-10-R Cartridge
9. Check Valve
10. MSHA Approved Pressure Switch (by others) or pneumatic
shutdown device
11. Gas Motor Circuit Test Module (not shown)
12. Automatic Actuator
The control module is a self contained system, powered by its own
internal lithium battery. This allows the detection system to operate
around-the-clock without use of external power.
The control module may be installed where the ambient tempera-
ture is between –40 °F to 140 °F (–40 °C to 60 °C).
The CHECKFIRE MP-N Detection and Actuation System is
approved by MSHA for permissible applications in an explosive
methane/air atmosphere.
