IOM-007
Installation Operation Manual for TC3A-107 and Similar EDUs
Page 7 of 19
No carbon steel must be present in the storage of the products.
Please note; maximum storage temperature takes into account solar gain. Skin temperature must
not exceed 70°C. Suitable protection must be used to ensure maximum storage temperature is
not exceeded.
7.3 AquaTRON Oil Tube Storage
Storage temperature range: -40°C to 70°C
Storage humidity: 0% to 85% R.H.
Maximum storage period: 2 years stored in accordance with ISO 2230 (pressurised).
If storage is outside the above guidelines, then protective covering is available on request.
Where Junction Boxes are used ensure protection from strong sunlight and strong
artificial light.
7.4 Long term storage of elastomers
For the recommended storage of elastomeric components e.g. termination sleeves and cable
boots, please refer to Tronic document MH006 - Procedure for Storage and Handling of
Elastomeric Materials.
8.
ELECTRICAL FLYING LEADS DESIGN
The EFL’s associated with this assembly are completely independent and are fitted with Diver
installable connectors at each end. All EFL’S are oil filled, pressure compensated and are
supplied complete. They are used to connect various subsea equipment.
All EFL’S should be retrievable and when installed should not cross-over each other.
The DigiTRON range of connectors have been developed for long term reliable signal and low
power control system applications associated with offshore installations. The underwater mate
able capacity of these connectors is achieved using pressure compensated electrical inserts
employing the CE principle.
All mild steel sealing surfaces shall be inlayed with Inconel 625, or similar, with no additional
protection (e.g. CP, Paint etc.) required. This is to prevent localised pitting of the interface.
If the connectors are to be left unmated, in seawater, for any length of time dummy connectors
must be used to protect the pin contacts in the receptacle connectors. Over exposure will
increase the risk of corrosion damage or marine growth on the contact surfaces of the receptacle
contact pins. This could lead to damage to the seals and insulation within the socket contacts.
Plug connectors do not require full dummy connectors for protection. Tronic advise the fitting of
acetal caps to protect plugs against marine growth. It is good practice to always fit the protective
cap when a connector is unmated topside prior to deployment to provide mechanical protection.
NOTE: 28 DAYS IS THE MAXIMUM CUMMULATIVE ALLOWABLE EXPOSURE OF
UNPROTECTED CONTACT PINS TO SEAWATER OVER THE LIFE OF THE CONNECTOR.
THIS ONLY APPLIES WITH POWER OFF.
9.
CATHODIC PROTECTION
EDU is equipped with external earth straps to provide CP protection to each connector installed
on the junction box. 2 off earth straps are also provided to be fitted to the mounting bracket and
the host structure that is providing a CP connection
