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MV & LV SERIES ENGINEERED DRY CHEMICAL FIRE EXTINGUISHING SYSTEM
OPERATION, DESIGN, & SERVICE MANUAL
REV C
Document # DOC324
Issued: April 26, 2018
Revised: March 22, 2022
UL FILE # EX27541
Section 5 Commissioning System
5.3 Installing Pneumatic Valve Actuator
Attaching the pneumatic valve actuator to the cylinder valve when the actuation pin is not fully locked into the
“up” position may cause the cylinder valve to actuate, resulting in potential injury and/or property damage.
Reset the pneumatic valve actuator by pushing up on the actuation pin until it bottoms out on the inside
of the actuator body. If the pin is not reset, it will depress the valve core stem when the pneumatic valve
actuator is threaded onto the valve actuation connection causing the valve to open.
e pneumatic valve actuator should be installed hand tight until contact is made between the actuator
and the top of the cylinder valve. A small gap will be present between the bottom of the pneumatic valve
actuator and the valve body.
5.4 Installing Electric Valve Actuator
Do not install the electric valve actuators until all pipe and nozzles are securely installed and system has been
fully commissioned. Failure to comply could result in personal injury or death from violent cylinder movement or
over-exposure to high concentrations of agent.
Attaching the electric valve actuator to the cylinder valve when the actuation pin is not fully locked into the “up”
position may cause the cylinder valve to actuate, resulting in potential injury and/or property damage.
Reset the electric valve actuator by pushing the pin up until it latches. If the pin is not reset, the valve core
stem could be depressed when the electric valve actuator is threaded onto the valve top causing the cylinder
valve to actuate.
Do not install the electric valve actuator if the control panel is in alarm or trouble. Clear all alarm conditions
and trouble conditions on the panel before installing the electric valve actuator.
e electric valve actuator assembly has a swivel base that is threaded onto the valve top.
e actuator is to be installed hand tight until contact is made between the actuator and valve top. A small
gap will be present between the bottom of the actuator and the valve body.
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