5
– FUNCTIONING AND USE
COD.
60M12/24.D.2018
EN
THE PRESENT MANUAL BELONGS TO -
Schenker Italia
- ALL RIGHTS RESERVED
36
5.2 Introduction
– by pass mode
The by-pass mode disables the low pressure and the cycling controls.Then the watermaker can work but not
in a safe condition, and has to be directly and continuously monitored.
The bypass mode has to be activated only in the following situations:
1. Chemical washing. The by-pass is necessary to avoid low pressure.
2.
Probe (signal pressure switch) fault. In this case the system gets an alarm (SYSTEM BLOCKED
message) because the probe gives to the controller a false indication, not because a real problem is
exsisting. The bypass mode allows the watermaker to by-pass the sensor and work.
CAUTION
Please, avoid to use the bypass mode if not strictly necessary. In this mode all the main electronic
controls of the watermaker and automatic sensors are disabled.
5.3 First start-up procedure
The first start-up procedure is necessary to start a new plant for the first time or to restart it after having
performed the laying up procedure.
The purpose of the start-up procedure is to essentially purge the air contained in the system.
5.3.1
Preliminary checks before proceeding with the start-up procedure
Please, be sure to perform all the following checks before proceeding with the start-up procedure:
1. Verify that all plant components are connected correctly.
2. Verify the 5 micron is installed correctly.
3. Be sure the seawater inlet valve and salt water drain valve are opened (If existing).
4. Be sure the reset valve is closed (lever
orthogonal
to the body valve) and the positioner completely
unscrewed.
5. Be sure the fresh water pressurizing pump of the vessel is on.
6. Be sure the valve on the active carbon filter is opened.
7. Be sure the fresh water tank is full enough (at least 50lt) to perform washing procedure.
