Crowcon Gasmaster - Module and Battery Replacement

Maintenance Crowcon Gasmaster
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4.3 Detector Calibration
Crowcon recommends that you check detectors
routinely to ensure correct calibration and opera-
tion.
Gas detectors require recalibration at least every 3
to 6 months. Fire detectors should be tested with
the same frequency. Site procedures may require
more frequent testing. See section 2.12 on page
14 for calibration instructions.
For detailed instructions on the routine functional
testing of detectors, please refer to the relevant
Installation, Operating and Maintenance Instruc-
tions provided with each detector.
4.4 Changing Batteries
During routine servicing, it is recommended that
the power be isolated from Gasmaster temporar-
ily to ensure that the back-up batteries are opera-
tional. Crowcon recommend that batteries are
changed every two years, and replaced as a pair.
Replacement batteries should be Yuasa UCEL
Y1.2-12, 12 v 1.2 Ah C20 lead-acid type cells.
A 10 A fuse is fitted to the batteries, for replace-
ment part number see Spare Parts and Acces-
sories section.
Figure 4.1
Batteries
Battery
connection
diagram
Battery replacement
Batteries should be checked regularly on units
operating over 40ºC.
Warning
When replacing batteries, care should be taken
to ensure cables are re-fitted as shown on the
battery connection diagram. Incorrect fitment
of battery cables may result in a fire and/or
harm to personnel.
4.5 Module Replacement
In the unlikely event of a Gasmaster compo-
nent failure, Crowcon recommend that repair
should not be undertaken by anyone other than
Crowcon approved personnel. Please contact
Crowcon for details of your nearest service centre.
4.6 Event logging
Gasmaster records alarms, faults and display
panel button activities in an Event Log. A maxi-
mum of 300 events are logged, after which data
is over-written on a first-in-first-out basis. This
function provides a record of all system activities
which can be uploaded using Gasmaster PC soft-
ware at any time.
The event log is held in RAM (volatile memory),
so in the event of a complete power failure all
data will be lost.
4.7 Service card
A card is fitted to the inside of the front cover for
logging service activity. It is recommended that
this card be filled in with the dates of services, and
details of any parts replaced.
4.8 Cleaning
If required, the outside of the Gasmaster case can
be cleaned by gently wiping with a damp cloth
using a mild soap solution only.