Page 41
Stratos-Micra • INSTALLER’S HANDBOOK • Iss. 16
11.6 Flow fault errors
• These occur when the airflow rate into the detector is outside the pre-programmed
limits. As the detector ‘learns‘ the flow setup from the initial installation, this
usually means that there has been some change in conditions. A Flow high fault
may indicate that a sampling pipe is damaged, and a Flow low fault may indicate
that the pipe has been blocked, e.g. by nearby building operations.
• If the detector input is sampled from one area and the exhaust is in another area
with different pressure (e.g. the detector is in a roof space and sampling from an
enclosed room), this may lead to flow faults. In this case it would be necessary to
lead a pipe from the exhaust to the protected area to ensure normal flow. This will
require the detector to be installed using the piped exhaust docking station (see
section 6.1).
• Intermittent flow faults may indicate local short-term fluctuations in air pressure.
To overcome this problem, the flow fault delay is programmable from 30 to 240
seconds.
11.6.1 "Low flow" error messages.
• Check that the pipe giving the error is not blocked
• Check that the low flow fault threshold is not set too high (see section 3.29)
• In the case of intermittent fault indications, try increasing the flow fault delay time
(see section 3.30).
11.6.2 "High flow" error messages
• Check that the pipe is pushed home into the inlet and is not broken or cracked
• Check that installed pipe-work is fitted with an end-cap.
PipeCAD
®
pipe modeling software prompts the use of appropriate end-caps.
Open bore pipes are not recommended.
• Check that the high flow fault threshold is not set too low (see section 3.28)
• In the case of intermittent fault indications, try increasing the flow fault delay time
(see section 3.30).
www.acornfiresecurity.com
www.acornfiresecurity.com
To Next Page
Loading...
