MAX POWER
DIRECTIONAL CONTROL VALVE
The directional control valve (DCV) must be placed between the pump and the
RETRACT unit, it is recommended to locate the DCV as near to the RETRACT as
possible (in an accessible and dry place).
The DCV block used must be equipped with a pressure gauge so as to check
operating pressure on commissioning and for maintenance.
The block must be equipped with a pressure relief valve set to 220 bars.
If a central system is used a cross line relief valve can be used.
(See Drawing N°6)
ELECTRICAL SYSTEM INSTALLATION
Although MAX POWER has used the best materials available, the installer should
endeavour to install all electrical equipment with the view that it should be in a
ventilated and dry environment at all times. Control panels mounted at helm stations
must be provided with protection if the station is exposed to the weather.
All wiring must be insulated from ground and its installation executed in compliance
with safety and classification standards.
CONTROL SYSTEM
The Retract R450 control system is all centralised in the electronic control box
All numbers indicated on our diagrams must be connected 1 to 1 and 2 to 2 wire
sections must be respected to the letter.
The control box command’s the up down unit and hydraulic power spool valves in the
correct sequence with correct timing. (Sequence chart with diagrams)
There is scope for modifying sequence timing in this box but consult MAX POWER
FIRST! (See diagram N° 8)
All Retract equipment is connected to this box
(See diagram N° 9)
All wires should be carefully
labelled to reduce the chance of error
and simplify
checking and troubleshooting.
All wire ends for terminals should be tinned before inserting into terminal blocks.
The control system of the RETRACT requires 30 amps of stabilised 24 v dc power.
The 24 volt input power is automatically transformed to produce 12 volts for the
control panel use
control panel only
.
The major power consuming components of the RETRACTS electrical system (the
raise/lower unit, the directional valve solenoids, and the electromagnetic clutch) are
supplied with 24 volts
from the
control box.
Complimentary alarms may be added at will (over heat, low oil, etc etc) as on
Diagram N°10
Switching the thruster
system
on is achieved by a two-pole 32-amp circuit breaker
(not supplied by Max Power), which should normally be located on the main electrical
panel.
- 10 INSTALLATION MANUAL RETRACT R 450
