IOM-007
Installation Operation Manual for TC3A-107 and Similar EDUs
Page 8 of 19
Stainless steel 316L (UNS S31603) diver mate connectors must be connected to the CP
(Cathodic Protection) system at all times. Super Duplex stainless steel (UNS S32550) connectors
should be isolated from the CP system to reduce the possibility of hydrogen embrittlement.
10. INSTALLATION & DEPLOYMENT
Tools Required for installation
1. Allan keys 5mm and 6mm
2. ¼ inch drive torque wrench 0-25 Nm – with 5mm and 6mm Allan key drive
10.1 Pre – installation checks for EFL’s and EDU
The following section details installation & deployment of Electrical Flying Leads and the EDU.
•
Check tagging and any label information is correct according to Project tagging document.
•
Ensure all equipment has passed Site installation Test.
•
Make sure prior to installation a final visual inspection of the equipment is completed.
•
No part of the connectors should be dismantled prior to or during deployment, apart from the
removal of protective caps, since there are no user serviceable parts inside.
•
Any defects need to be recorded on the punch list at section 16 of this document and where
possible take photos of any issues that need to be recorded and inform Technical Dept.
•
Before mating, the receptacle connector should be checked for debris. The connectors have
been designed to accommodate sand and silt contamination; however large pieces of debris
should be removed. Use a water jet if subsea.
•
Before mate / demate all power is to be switched off – The DigiTRON range is designed to
be mated with POWER OFF. In exceptional circumstances it is possible to mate the
connectors with power on but the following is to be considered:
Note:
It is important to isolate and earth prior to disconnect in order to remove any stray
charges in the system. If left, this can induce corrosion on the exposed pins once the plug
is removed.
10.2 Installation of Junction box and mounting brackets
•
The junction box is designed to be mounted and deployed in a horizontal position only .
•
It is critical the brackets for the junction box are installed as identified on DRG T31014
1. Drill interface holes as required for installation as per drawing T31014 sht 1.
4-off M8X1,25-6H TAPPED HOLES MIN THREAD LENGTH 40mm
Or
4-off M8 THRO’ HOLES – (Client to provide nuts for thro hole fitting option).
See fig 1 & 2 which highlight dimensions from drg T31014 sht1 for hole centres
(images provided for reference only.)
