10
HARDI
®
FOAM MARKER STANDARD VERSION
1. Mix foam marker concentrate in the foam tank following the mixing
instructions (Section 5).
2. The In-Cab control box is used as follows: (Fig. 5)
Switch “A” is used to alter the frequency of foam
drops. Regulation is done using a poten-
tiometer. Turning the knob clockwise will
increase the frequency and turning the
knob coun ter clock wise will decrease the
frequency.
Switch “B” has three positions. In the center posi-
tion the foam marker is switched off.
Activate switch to the left or right cor-
responding to which side foam mark ing
is required.
3. Check the performance of the foam marker.
5.0 MIXING OF FOAM CONCENTRATE
Note: Foam concentrate needs to be stored in a frost free place and
shaken well before using. If frozen, raise to room temperature,
thaw completely and thoroughly mix prior to use.
CAUTION: FOAM MARKER TANK CONTENTS ARE
UNDER PRESSURE
1. Remove fi ll cap on Foam Marker tank. Open fi ll cap slowly and allow air
pressure to be released before removing the cap completely.
2. Fill tank 1/2 full of fresh clean water.
3. Add recommended rate of foam concentrate. We recommend using
HARDI
®
foam concentrate at a 80:1 ratio (approx. 16 oz. to 10 gallons)
(29 ml. to 38 liters of water). Amounts may need to be varied depend-
ing on hardness of water and weather con di tions. Refer to the HARDI
®
foam concentrate label for further in struc tions.
4. Continue fi lling Foam Marker tank with water.
A
B
CONTROL BOX
Fig. 5
4.0 OPERATION OF THE HARDI
®
FOAM MARKER
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