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PRESSURE BALANCE CONTROL
The PH Series Proportioner has been designed with a pressure balance control system.
This system will give the operator of this machine the ability to control a pressure
imbalance within certain predetermined parameters.
The system consists of:
Selector Switch
Fault Light
On Light
Control Unit
Pressure Transducers
Relay
OPERATION
Position the selector switch on one of the three options:
Pressure differential number – these consist of 300, 400, 500, 600, and 700
PSI. Selecting any of these numbers with the switch will activate the green ON
light. While the pressure differential numbers are selected, the control box will
continually monitor pressure on both sides of the Proportioner. In the event that
the pressure differential between both sides of the Proportioner is equal to or
larger than the selected number, a fault is given (the red fault light is turned on
and the active green light is turned off) and shuts down.
Off – if the selector switch is placed in this position, the Proportioner will operate
as though there is NO PRESSURE BALANCE CONTROL SYSTEM (neither the
red fault light nor the active green light will be lit). The over pressure system will
remain active for the machine and personnel protection.
Reset – in the event of a pressure imbalance, resolve the Proportioner
imbalance, position the selector switch on reset to clear the fault light and restore
power to the Proportioner. After the fault has been cleared, position the switch in
either a Pressure Differential number or in the Off Position to continue
operations.
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