
Page
45
of
116
©HALE PRODUCTS, INC. Our policy is one of continuous development. We therefore
reserve the right to amend specifications without notice or obligation.
FOAM TANK LOW LEVEL SENSOR
The unit is supplied with a connector for a low foam level sensor. The sensor is supplied with the unit
ready for installation (instructions supplied with the sensor (Hale P/N: 200-2110-02-0).
The low foam level sensor is part of the Safety Interlock system and must be installed.
Note:
The low foam level sensor must be installed in the tank in the correct orientation. The sensor
has an arrow indicating the required orientation and must point upward.
The foam tank requires a ½” NPT tapped hole for secure mounting of the sensor. The maximum
allowable thickness of the tank wall material is 3/4 in [19mm].
The center of the level switch should be located a minimum of 1-1/2 in [40mm] above the foam
concentrate outflow to the foam pump.
Additional Installation Points
FOAM TANK TO FOAM PUMP
The foam feed line must not at any point be lower that the foam pump and be fitted with a valve for
maintenance purposes. The isolating tap should be located as close to the tank as possible. A
flushing point should be fitted close to the isolating tap to ensure that the maximum length of hose
line can be flushed out. The flushing line should also be fitted with an isolating valve.
Foam supply line I.D.
Class A
3/4 in [19mm] minimum
Class B
1 in [25.4mm] minimum
The foam tank must be located to provide positive head pressure of foam concentrate to the Foam
unit, and the supply hose should be arranged to fall gradually from the tank to the foam pump inlet to
avoid air pockets. A tank drain valve must also be installed.
The foam tank should be made of plastic or stainless steel, compatible with foam chemicals, with a
volume of 6.6 gallons [25 litres] or greater to allow an entire drum of foam agent to be contained. Refer
to
Foam unit Model 3.3/5.0/6.5
Manual.
Note:
To ensure correct operation of the Foam unit pump, all connections must be secure and pressure
tight.
Содержание HALE SmartCAFS
Страница 106: ......