Page: 95
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 6 System Inspection and Maintenance
6.2.4 Six Year Maintenance
Dry chemical in stored pressure systems shall not require a semiannual examination for evidence of caking,
but shall be examined every six (6) year as per NFPA 17. If there is evidence of caking, the dry chemical shall
be discarded and the system be recharged in accordance with the Janus Fire Systems recharge procedure.
6.2.5 Additional Notes on Maintenance
The Mv and Lv Series low-pressure supervisory switch assembly and the pressure gauge assembly shall not be
removed from the cylinder valve while the contents are under pressure. Removal while the contents are under
pressure may damage the O-ring seal, gauge, or switch, requiring the replacement of the entire assembly.
Any time the pressure gauge assembly or low-pressure supervisory switch assembly is removed from the
cylinder valve, the assembly o-ring must be replaced with a new o-ring (P/N 98791 - Pack of 25). Prior to
re-installing the pressure gauge or switch assembly, both the new o-ring and the inside of the pressure gauge
connection on the cylinder valve must be lightly lubricated with Molykote 55 by Dow Corning (P/N 19056)
or equivalent.
To Next Page
Loading...
Need help?
General