Hydro Instruments VPH-10000-1 Series, Instruction And Operation Manual

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Water Level Alarm Testing
a. Turn on the vaporizer unit and allow the water to automatically fi ll the tank.
b. The low water level alarm should be on until the water in the sight glass reaches the low water
alarm level marking.
c. The solenoid should remain open until the water level in the sight glass reaches the high water fi ll
level marking. Then the solenoid should automatically close.
d. If desired, open the drain valve to bring the water level down to the low fi ll level to verify that the
solenoid will then automatically open to start refi lling water into the tank.
e. If desired, test the water level overfi ll alarm by manually opening the solenoid valve until the water
level in the sight glass reaches the overfi ll level. At this level, the overfi ll alarm should activate.
Water Tank Temperature Alarm Testing
a. Remove the water temperature thermocouple from the water tank fl ange, leaving the thermocouple
extension cable (yellow) connected.
b. Place in a bath of room temperature water, allow the sensor to reach equilibrium and check the low
water temperature alarm will activate.
c. To check the high water temperature alarm, boil water in a separate container. Place the
thermocouple in the nearly boiling water (approximately 210ºF / 99ºC) to verify that the high water
temperature alarm will activate.
d. Reinstall the thermocouple onto the water tank fl ange.
Superheat Alarm Testing
The superheat alarm can be tested by placing the chlorine gas temperature probe in ice water during
the pressure switch alarm testing.
Cathodic Protection Testing
At the top of the water tank fl ange, unfasten the screw and wire connectors from the magnesium anode
nearest the ammeter. The current value should then drop to zero.
1.3 Component Preventative Maintenance
All rupture discs should be replaced on a yearly basis. O-rings and gaskets should also be replaced
yearly or sooner if they appear cracked/damaged in any way. Before proceeding to perform any testing
or maintenance ensure that there is no chlorine in the system and that the chlorine inlet piping is shut
off. Please refer to Section III.4.2 for system shut down.
Magnesium Anode Replacement
Based on normal operating conditions, the four (4) sacrifi cial magnesium anodes will need to be
replaced yearly or more often if necessary. This is a very important step as it protects the chlorine
pressure chamber and all other system components from corrosion.
a. Remove wires connected to the anodes.
b. Remove anodes.
c. Install new anodes into the respective locations and attach the anode wires.