Carrier Graviner Mk7 User Manual

OMD Technical Note TN18001
Carrier Fire & Security
8 Newmarket Court, Page 1 of 14
Chippenham Drive,
Kingston, Milton Keynes, MK10 0AQ
Graviner Mk7 Oil Mist System Detector Head Inspection &
Cleaning Process
Introduction
The Graviner OMD Detector is made of 2 assemblies, the Detector Head and the Detector
Base. The Detector Head is attached to the Detector Base with 2 Allen bolts.
The oil mist detection chamber in each Detector Head must be inspected at regular intervals
and cleaned to remove any buildup of oil splash or carbon deposits created by the operation
of the engine.
Our experience indicates that the cleaning interval will be unique to each engine and
dependant upon many factors such as the way the vessel engine is operated, the engine
temperature, the condition of the engine oil and the engine service intervals.
This Technical Note describes the tools required and the cleaning procedure to be used to
inspect and clean the Mk7 Detector.
As required by IACS M67 Graviner Mk7 OMD systems will automatically warn the Users
when the detection window becomes partially obscured and must be cleaned. Graviner
recommend establishing a cleaning and maintenance regime to minimise any Fault message
warnings of this type and maximise the service life of each Detector Head.
As a guide, the Detector Head should be cleaned and inspected every 6 months and the
sample pipe in the Detector Base cleaned and inspected every 12 months.
Detector Head
Detector Base
Detector Sample Pipe

Carrier Graviner Mk7 Specifications

General

Brand	Carrier
Model	Graviner Mk7
Category	Security Sensors
Language	English

Summary

Cleaning the Detector

Inspect the contents of the Mk7 Event log

Checks the event log for fault messages indicating detector contamination.

Check the Status of each Detector

Carry out Parameter readings of each Mk7 Detector

Records parameter readings for each detector before cleaning.

Power Down and Disconnect Detector

Remove Detector Head and Inspect Base Unit Seal

Detaches the detector head, exposes the fan, and checks the base unit seal.

Clean Oil Mist Detection Opening

Uses recommended fluid and buds to clean the detector head's internal aperture.

Thoroughly Clean Detector Head Aperture

Reassemble Fan to Detector Head

Reattach Detector Head and Power Up System

Check Contamination Level Post-Cleaning

Measures and records the contamination level after cleaning to assess effectiveness.

Detector Head Replacement Criteria

Defines conditions for replacing the detector head based on contamination level readings.

6 months

Final Assessment and Support

Final Contamination Level Assessment

Compares post-cleaning contamination levels to original values to determine detector service life.