Smoke Alarm User Manual

Installation, Operation and Maintenance Manual
Issue 1 Page 7-1
February 2001
7 ROUTINE MAINTENANCE
7.1 Introduction
This chapter contains maintenance instructions for the High Sensitivity Smoke Detection (HSSD) system.
These procedures should be accomplished on a scheduled basis. In the event that system problems are
found during the performance of a procedure, reference should be made to Trouble Shooting and
Corrective Maintenance which can be found in Section 8 of this manual.
7.2 Scheduled Maintenance
The scheduled maintenance of the system should be performed at an established interval. The interval
between scheduled maintenance procedures being carried out should not exceed any imposed
regulations. See BS5389 part 1, or other local requirements.
7.3 Maintenance Procedures
The following paragraphs outline general scheduled maintenance procedures to be performed on an
as-necessary basis.
7.3.1 Visual Check
A visual check must be performed every six months. This check is recommended to ensure pipe network
integrity. To perform the visual check, observe the entire piping network and check for abnormalities in
the pipe including any breaks, blockages, crimps, etc.
7.3.2 Battery-Status Check
The battery backup used on the power-supply powering the Detector must be tested every six months as
follows:
A battery-status check is best accomplished by running the load with the batteries for about one hour
then, while the load is still on measuring the individual battery voltages. If any battery reads 1.5 volts or
more below its rated voltage, that battery should be replaced. Generally, if one of a series set of batteries
is low, the others will soon fail. Therefore, it is advisable to replace all the batteries of a series set when
one requires replacement. Any battery that has been in service for 48 months or more must be replaced.
7.3.3 Gross Smoke Test
The gross smoke test is a Go/No-Go type test which insures the Detector responds to smoke. This test
must be performed at system commissioning and every year there after.
To perform this test, smoke must be introduced into the last sampling port and the proper response must
be verified at the Detector. Smoke from a punk or cotton wick may be used. Aerosol test smoke may
also be used. Refer to Chapter 6 for further information.
NOTE
For clean-room applications consult with supplier for gross smoke test methods.