Janus FM-200 Sv Series - 6 System Inspection and Maintenance; 6.1 Monthly Inspection

Page: 57
FM-200® OPERATION, DESIGN, & SERVICE MANUAL
Revision F
Document # DOC102
Issued: February 1, 2009
Revised: 11-Nov-2011
40YE
Section 4 System Installation
4.1.5 Installing Discharge Pressure Switch
Pressure to operate the discharge pressure switch is supplied by the primary cylinder. In a single cylinder
system, it can be connected to the pilot actuation port or a tee in the discharge piping. In a multiple cylinder
systems, it can be connected to the discharge manifold or the pilot actuation port of the nal slave cylinder.
e discharge pressure switch has a SPDT contact for connection to the control panel. e switch will send
a signal to the control panel conrming system actuation. If a control panel is not included, the discharge
pressure switch can provide necessary control functions for closing any doors or dampers in the room or
enclosure or to initiate the shut down of equipment that may deplete agent concentration.
1. Mount the switch box securely onto a wall or structural member using the mounting holes provided.
e switch should be located so that it can be manually reset following actuation. Preferred mounting is
upright with pipe connections to the bottom.
2. Connect 1/2 inch conduit and appropriate wiring to the electrical connection on the switch box.
3. To switch loads heavier than the switch rating, or requiring more than two contacts, the switch should be
used to operate a relay or contactor to control the load.
4. Connect the 1/4 inch NPT connection at the bottom of the front plate to the agent piping using 1/4
inch steel pipe or 1/4 inch or 3/16 inch O.D. copper tube. Install a union tting at base of cover to allow
removal of front plate for testing.
4.1.6 Installing Pilot Actuation Line
On a multiple cylinder system, the primary and slave cylinders must be interconnected with the pilot
actuation line. Flex hose and ttings necessary to assemble the pilot actuation line can be ordered from
Janus Fire Systems, but the pilot actuation line may also be assembled using copper tubing or schedule 40
pipe provided by the installer. Refer to Sections 4.1.6.1 through 4.1.6.4 for requirements to each specic
type of pilot actuation line arrangement.
Up to 16 cylinders can be actuated simultaneously on a single system. e primary cylinder valve is discharged
electrically or manually and up to 15 slave cylinders can be actuated pneumatically using pressure from the
primary cylinder through the pilot actuation line.
A pilot actuation check valve must be installed into the pilot actuation port with the direction of ow out
of the valve. is pilot actuation check valve is used to maintain pressure in the pilot actuation line and
pneumatic valve actuators to ensure the valve remains open during discharge and a complete dispersal of
slave cylinder contents is achieved.
e pilot actuation line connects to each slave cylinder at a 1/4 in (8 mm) female NPT inlet port in the
pneumatic valve actuator. One pneumatic valve actuator is required for each slave cylinder.
A vent check must be installed in the pilot actuation line downstream of the pilot actuation check valve
typically at the last cylinder. It is used to bleed o pressure that may accumulate in the pilot actuation line,
reducing the chance of inadvertent operation of the pneumatic valve actuators. e vent check contains a
ball seat that seals the vent check during the rapid pressure accumulation of an actual discharge.
Before assembling the pilot actuation line, all hose, tubing, pipe and/or ttings should be carefully cleaned
internally to remove all oil, dirt, or foreign material.