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W-562
Always depressurize
the entire system,
disconnect all power
sources and lockout/
tagout all components
before any maintenance
or troubleshooting is
attempted. Failure to
comply with the above
warning could cause
electrical shock and
inadvertent activation of
equipment resulting in
death or serious injury.
W-506
OSHA requires blast
cleaning nozzles be
equipped with an
operating valve, which
shall be designed to
be held open only
by continuous hand
pressure and shall
close immediately upon
release of hand pressure
(i.e., a "deadman"
control). The valve
shall not be modified in
any manner that would
allow it to remain open
without the application
of continuous hand
pressure by the
operator. Failure
to comply with the
above warning could
result in release of
high speed abrasive
and compressed air
resulting in death or
serious injury. OSHA
29CFR 1910.244(b)
W-511
For equipment
manufactured by entities
other than Marco,
you must consult the
Original Equipment
Manufacturer operator's
manuals, information,
training, instructions
and warnings, for the
proper and intended
use of all equipment.
Failure to comply with
the above warning
could result in death or
serious injury.
9
Blastmaster
121P Remote Control System
®
OPERATING INSTRUCTIONS
Description
Remote control systems give an operator the ability to remotely activate and deactivate the
flow of air and abrasive at the nozzle. Pressure-release remote control systems pressurize
and depressurize the blast pot each time the operator activates and deactivates the remote
control switch, allowing the blast pot to be filled between activation cycles. This increases
productivity and eliminates the need for a pot tender. The Blastmaster
Control System is a pressure-release remote control system that uses a pneumatic signal
from the remote control switch to remotely activate and deactivate a blast pot. Typical
applications include blast rooms, blast yards, bridges, oil refineries, pipelines, railcar shops,
shipyards, and storage tanks.
Operational Requirements
The following is required for proper installation of a Blastmaster
Control System:
• A blast pot with an air inlet and air exhaust outlet of 1" I.D. or greater.
The following may cause safety hazards or reduced performance:
• Improper installation and/or maintenance of components
• Improper air supply pressure (operating pressure: 50–150 PSI)
• Improper electric power supply
Operating Instructions
Before using:
• Ensure blast pot is depressurized. See blast pot Operator's Manual for instructions.
• Inspect all remote control lines ensuring they are free of obstructions or damage. Remove
obstructions or replace control lines before use.
• Inspect components of Blastmaster
leaks. Repair or replace damaged components before use.
• Ensure Petcock (4) on Inlet Valve (9) is in the OPEN position.
• Test Pneumatic Remote Control Switch (8) for proper functioning. (See pneumatic remote
control switch Operator's Manual for instructions).
• Connect air supply hose from compressor to Inlet Port (5).
During use:
• To begin abrasive blasting, activate the Pneumatic Remote Control Switch (8), this will
complete an air circuit to the Inlet Valve (9) and Outlet Valve (2) to begin pressurizing the
blast pot.
• Monitor all components of the Blastmaster
functioning.
• Inspect and clean Abrasive Trap (1) at least twice daily to ensure correct functioning.
Repair or replace damaged components.
• To cease abrasive blasting, deactivate the Pneumatic Remote Control Switch (8), this will
interrupt the air circuit, allowing the blast pot to depressurize.
After use:
• Inspect Blastmaster
®
replace damaged components.
121P Remote Control System for damage and air
®
121P Remote Control System for proper
®
121P Remote Control System components for damage. Repair or
121P Remote
®
121P Remote
®
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