assembly instructions

JULIANA VANLET IRRIGATION SYSTEM
Congratulations on purchasing your JULIANA VANLET, which is the result of 15 years’ experience of automatic drip irrigation
systems.
PLEASE READ THESE INSTRUCTIONS THROUGH CAREFULLY BEFORE USING THE SYSTEM.
The JULIANA VANLET consists of a tank unit (1) with a lid (2). Within this is a fertilizer tank (3) with a dosing spoon (4) and
float/swimmer (5).
The idea is that when the mixing tank is filled with water, the spoon is raised as the water rises, causing a dose of fertilizer to be
added.
A red measuring glass (6) is fitted to the tank unit. This contains a regulating cock (7). This is designed to give the approximate water
flow rate that has been set, even through the pressure of the main water varies from 0.5 to 8.0 atm. The water flow rate can be
adjusted by slowly turning the regulating cock from approx. 10 to 150 litres/day. When the water level in the measuring glass is at
the bottom of the scale, the system will give the lowest water flow rate. When the level is at its highest, it will give the highest flow
rate. Three or four turns of the regulating cock are sufficient to give the maximum water flow rate.
Note that water will flow faster through the hole from the measuring glass when it its heated. The water column will therefore fall
when the temperature rises during the day and rise again at night when the temperature falls. However, the flow rate of the water
passing through will remain approximately constant.
When the water in the tank unit reaches the bend in the siphon hose (8), the content of approx. 4 litres of water mixed with
fertilizer will flow out to the plants.
NB: The siphon hose may have moved. To check that it is placed correctly, add about 4 litres of water to the mixing tank, so that the
water level reaches the bend in the siphon hose. You will then be able to see water flowing out of the hose.
When the level falls below the bottom of the small siphon plug, air will again be sucked in, and the water flow will be stopped. The
tank unit will then be refilled.
Always ensure good drainage in the greenhouse or bed, so that large quantities of water can be added without damaging the plants.
During the summer, 2-3 litres of water per day can be fed to cucumber and tomato plants, which can grow to 2 metres tall, and
other plants of the same size. The system can empty 4 litres in less than 10 minutes. This is achieved by having as large an opening
in each drip pin as possible. The further out the red regulating plug (12) is placed on the drip pin, the more water will flow out. If
only a few plants are to be watered, more drip pins per plants should be used, so that at least 12 are in use.
Water can drip or flow out of the drip pins, but this is of no importance.
NB: Inside the cock (7) there is a small neoprene gasket (7a), which controls the water flow rate. The cock must never be screwed
fully out with the water pressure on, as the neoprene gasket could be forced out and lost.
Turn off the water supply before cleaning the measuring glass. Remove the measuring glass from the device. Turn off the cock
completely and carefully shake the gasket out of the chamber.