TO INSTALL HIGH TEMPERATURE BLOW OFF CAPS:
Standard Nozzle:
Remove standard blow off cap – thread the loop of the high temp. cap onto the
base of the male threads on the nozzle. Install o-ring on nozzle tip, place cap on
nozzle tip.
Swivel Adapter:
Remove standard blow off cap – thread the loop of the high temp. cap onto the
supply pipe before installing the nozzle body. Install o-ring on nozzle tip, place the
cap on nozzle tip.
INSTALLING A MECHANICAL GAS VALVE MRM, MRM II OR PRM:
Refer to the design section for limitations regarding mechanical gas valve installations.
WARNING:
CONFIRM THAT THE GAS IS SHUT OFF AT THE SOURCE OF SUPPLY BEFORE
ATTEMPTING TO INSTALL THE MECHANICAL GAS VALVE. A QUALIFIED, LICENSED
CONTRACTOR SHOULD PERFORM INSTALLATION OF THE GAS VALVE INTO THE GAS
LINE.
The mechanical gas valve shall be located where it can be accessed for resetting, maintenance, service and
where the status indicator may be viewed. The listed temperature range for the mechanical gas valves is 32°F –
120°F (0°C – 49°C).
Before beginning installation of the mechanical gas valve, associated
cable, conduit and fittings, confirm that:
1.
The MRM/PRM has the set-up/lock-out tool installed.
2.
The tension bar is in the “down” (relaxed) position.
3.
The nitrogen actuation cylinder has not been installed.
.
Install the gas valve into the gas line. If any strainers are to be
used they shall be placed upstream of the gas valve. Confirm that
the valve is installed with the correct gas flow direction as
indicated by the arrow on the gas valve body. Wrenches must be
placed on the valve at the point closest to the connection being
tightened and a “hold” must be placed on the valve when fitting
pipe downstream of the valve body.
DO NOT USE THE GAS VALVE AS A LEVER FOR
TIGHTENING PIPE.
If pipe joint compound is used, it must be applied sparingly to the
back male threads.
Pipe joint compound entering the gas valve
and collecting on the valve seat will cause the valve to fail.
Test the gas valve and connections for leaks using a soapy
solution.
December 2008
Section 4 Installation
Page 4– 17
Amerex Restaurant Fire Suppression System (EX 4658)
Improper installation of the Red Vinyl Cap
may cause failure of the gas valve to
close.
Remove the protective plug from the MRM / MRM II or PRM and
install the gas valve trip assembly (P/N 12740). The gas valve trip
assembly must be purchased separately for use with ASCO and
Ansul gas valves
AMEREX P/N 12740
Apply wrench to gas
Valve hex flat only