HALE SmartFOAM 1.7AHP, Описание, установка и руководство по эксплуатации, Страница: 57 / 93

Page 56
SmartFOAM
FOAM TANK LOW LEVEL SENSOR INSTALLATION
The foam low tank level sensor(s) must be installed and wired to monitor the foam concentrate level (see Figure 39 : Low
Level Sensor Mounting Options ).
Figure 39 : Low Level Sensor Mounting Options
CAUTION!
FOAM TANK LOW LEVEL SENSORS MUST BE USED TO PROTECT THE HALE SMARTFOAM FROM DRY
RUNNING. FAILURE TO USE LOW LEVEL SENSORS WITH THE HALE SMARTFOAM SYSTEM VOIDS THE
WARRANTY.
Side Mount Installation
A side mount low tank level sensor is used if the bottom of the foam tank is not accessible.
1. The sensor has
1/2” (13mm) NPT threads. If tank design and construction allows, the side mount sensor is
threaded directly into the side of the tank at the proper height (see Figure 40 : Side Mount Sensor Location
Dimensions ).
Also, the sensor can be mounted on the foam tank using a 1/2” x 1” (13x 25mm) NPT bushing and
a bulkhead fitting with 1” (25mm) FNPT threads.
2. The center of the switch must be located at least 1-½ to 2 inches (38 to 51 mm) from the bottom of the foam tank
with the float positioned on top of the switch to allow up and down movement.
Note : When the side mount low level sensor senses a low concentrate condition the system operates for an
additional one minute unless the foam concentrate level is restored. If the foam concentrate level is not restored
the system SHUTS DOWN. When locating the side mount low tank level sensor on the tank sufficient foam
concentrate should be present for one minute of operation at the rated flow.
3. Coat the threads of the sensor with a suitable sealant and insert into tank fitting. Tighten sensor making sure the
float is on the top of the sensor (see Figure 39 : Low Level Sensor Mounting Options ).
4. After installation, check operation of the side mount low tank level sensor with a powered test light. With no foam
in the tank, the light should be ON. If light does not illuminate, rotate the side mount low tank level sensor until the
test light is ON.