Carrier Graviner Mk7 Configuration guide

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

OMD Technical Note TN18001
Carrier Fire & Security
8 Newmarket Court, Page 2 of 14
Chippenham Drive,
Kingston, Milton Keynes, MK10 0AQ
Graviner recommend that the Detector Base and sample pipe are blown through with Clean
Air to remove any potential blockages as shown in the image below.
Clean Air at a working pressure of up to 90 PSI should be used.
WARNING - Do NOT remove the Detector Base from the engine crankcase
whilst the engine is in operation.
This action should be carried out whilst the engine is stopped to avoid the
possibility of hot oil coming out of the Detector Base.
Please Note
Graviner Detector Heads should only be cleaned with the recommended cleaning fluid and
cleaning buds.
Many cleaning fluids have been evaluated by Graviner but only the Electrolube ASC fluid is
recommended by Graviner as our tests have shown it offers the best cleaning ability and
leaves no residue on the glass chamber.
(Note: Do not use any third-party electronic contact cleaners, isopropyl alcohols, flux
removers, any harsh chemical cleaners, etc., as these will affect the Detector
performance.
Only use the official Graviner Cleaning products).
These items are included in the Graviner Service Kit (D9221-027), see contents list below :-
The items are also available from Graviner as individual parts.

OMD Technical Note TN18001
Carrier Fire & Security
8 Newmarket Court, Page 3 of 14
Chippenham Drive,
Kingston, Milton Keynes, MK10 0AQ
Service Kit (part number) D9221-027 consists of:
Description
Part No
Qty
Category
Fan Retainer
1-B3741-902
5
Spares
Compression Spring
1-B3721-006
5
Spares
Base Moulding Seal
1-C1513-802
5
Spares
Fan Connector Seal (1 Screw)
1-C1413-801
5
Spares
Fan Connector Seal (2 Screw)
1-35134-K037
5
Spares
M3 Screw
1-21833-H01
5
Spares
Glass Cleaner 250ml
1-A7311-002
1
Consumables
Foam Buds Pkts –Packet of 25pcs
1-B6910-217
2
Consumables
4mm Hexagon Key
1-B691 0-219
2
Tools
Pulling Tool
1-D9131-002
1
Tools
Materials Safety Data Sheet
-
2
Information

OMD Technical Note TN18001
Carrier Fire & Security
8 Newmarket Court, Page 4 of 14
Chippenham Drive,
Kingston, Milton Keynes, MK10 0AQ
Cleaning the Detector
1. Inspect the contents of the Mk7 Event log.
It is important to check the contents of the Mk7 Event log as it may show Fault messages
which indicate the condition of a defined Detector.
A Contamination Low Fault or Photodiode Fault message is typically an indication that the
Detector is contaminated by oil and should be cleaned.
Photograph and document the Event Log screens on the Remote Display Unit.
Alternatively, if available, use the Mk7 Oil Mist Engine Manager Tool and USB cable to
download the Event Log. The event log should be saved to the PC for future records.
At this time the System Test Log should also be saved for future records.
On the engine screen select Logs > View System Test Log
2. Check the Status of each Detector prior to any cleaning taking place.
Using the Remote Display Unit access the Detector Status Screen for each Detector.

OMD Technical Note TN18001
Carrier Fire & Security
8 Newmarket Court, Page 5 of 14
Chippenham Drive,
Kingston, Milton Keynes, MK10 0AQ
Ensure:-
The Alarm and Pre-Alarm level settings are correct,
The Detector is NOT Isolated,
There are NO active Faults shown.
If any Faults are indicated, please take appropriate actions to clear the indication(s).
3. Carry out Parameter readings of each Mk7 Detector prior to any cleaning taking place.

OMD Technical Note TN18001
Carrier Fire & Security
8 Newmarket Court, Page 6 of 14
Chippenham Drive,
Kingston, Milton Keynes, MK10 0AQ
This will show the current status of the selected Detector and should be used to advise
the end customer of the expected service life of the Detector.
The parameters displayed also include the Serial Number of the Detector (which is
sometimes no longer visible on the external label due to exposure to oil) and the
software version.
Note the readings for each Detector
4. If safe to do so power down the OMD system or Isolate the Detector as described in the
Mk7 OMD system Installation, Operation & Maintenance (IOM) Manual.
5. Disconnect the cable connector fitted to the top of the Detector Head.
6. Using a 4mm hexagonal key, loosen the two fixing screws in the Detector Base unit. The
screws are self-retaining.
7. Remove and invert the top part of the Detector Head so the Fan is visible.
8. Wipe off any excess oil from the surface of the base and fan.
9. Examine the Detector Base unit seal and replace if damaged or perished or not seated
firmly in its channel.
CAUTION: - Do NOT press the fan label, handle only the fan outer housing.
10. Using the Pulling Tool (see below), slowly remove the Fan Retaining Plug by capturing
the shoulder and pulling. Carefully remove the Fan from its mountings.
BEWARE: - Please take extreme care NOT to lose any of the Compression Springs or the
Fan Retaining Plug.

OMD Technical Note TN18001
Carrier Fire & Security
8 Newmarket Court, Page 7 of 14
Chippenham Drive,
Kingston, Milton Keynes, MK10 0AQ
11. Examine the 4 Compression Springs and the Fan Retaining Plug; replace any damaged
items. Spares for these items are included in the Service Kit (part number) D9221-027.
12. Ensure the Fan is free running and not clogged by oil residues.
13. If Fan damage is suspected refer to the section on Fan Replacement, in the Mk7 IOM
Manual.
14. Using the following images on this page as a guide, apply the Graviner recommended
glass cleaning fluid to a foam bud and wipe carefully around the inside of the oil mist
detection opening in the Detector Head.
(Note: Do not use any electronic contact cleaners, isopropyl alcohols, flux removers, any
harsh chemical cleaners, etc., as these will affect the Detector performance.)
Fan Retaining
Plug
One Fixing
Screw

OMD Technical Note TN18001
Carrier Fire & Security
8 Newmarket Court, Page 8 of 14
Chippenham Drive,
Kingston, Milton Keynes, MK10 0AQ
15. Ensure that the glass ring around the side of the Detector Head and the small aperture
shown in the image above are thoroughly cleaned with the foam cleaning buds.
16. To ensure thorough cleaning Graviner recommend that steps 14 and 15 are repeated
with cleaning fluid applied to another foam bud.
17. Examine the Detector base body and sample tube and wipe clean where necessary.
18. Reassemble the Fan to the Detector Head using the Fan Retaining Plug.
CAUTION: Do not press the centre label of the fan, only handle the fan by the outer
housing.

OMD Technical Note TN18001
Carrier Fire & Security
8 Newmarket Court, Page 9 of 14
Chippenham Drive,
Kingston, Milton Keynes, MK10 0AQ
19. Reattach the Detector head to base and re-tighten the fixing screws. Attach the cable to
the Detector Head.
20. If the OMD system was powered off, switch the power back on and allow the system to
initialise.
21. Otherwise De-Isolate the Detector, Press OK on the Mk7 Remote Display Unit and
ensure the display returns to normal.
22. Using the Mk7 OMD Remote Display Unit or Mk7 Oil Mist Engine Manager tool measure
and note the Contamination Level of the Detector being cleaned.
23. If the Contamination Level reading does NOT return to within 20% of the original
Contamination Level reading the Detector Head should be replaced as it is approaching
the end of its operational service life.
24. Repeat the above procedure for all Detectors to be cleaned.

OMD Technical Note TN18001
Carrier Fire & Security
8 Newmarket Court, Page 10 of 14
Chippenham Drive,
Kingston, Milton Keynes, MK10 0AQ
12 Month Service
At 12-month intervals it is recommended that the Detector sample pipe is removed so it can
be cleaned and inspected.
Please ensure that the vessel engine is not rotating when the sample pipe is removed
from the engine to prevent against hot oil being sprayed from the opening.
Graviner recommend that the Detector Base and sample pipe are blown through with Clean
Air to remove any potential blockages as shown in the image below.
Clean Air at a working pressure of up to 90 PSI should be used.
6 months
Perform a visual inspection
1. Externally inspect all Mk7 Control Unit(s) in the OMD system taking note of the
condition of all Glands, External Wiring and LED indications displayed.