LILIE GmbH & Co. KG Heinrich-Hertz Straße-30 D-74354 Besigheim Germany
Tel. +49 (0)7143 9623-0 Fax +49 (0)7143 9623-23 [email protected] www.lilie.com
Seite 2
Stand 16.01.2019 / # E-6103_A-en / 11 / 04.2019
© LILIE GmbH & Co. KG
Subject technical changes
ELECTRICAL CONNECTION
•
Ideally, the pump should be connected to its own electric circuit, with a respective circuit breaker and a fuse which meets the require-
ments specified on the type label.
•
A 15-Ampere-switch is recommended, for the (positive current-carrying) wire.
•
Adequately sized cables are required for proper operation of the pump. Too small of cable size leads to low voltage and impairment of
the pump function.
•
SWITCH OFF THE POWER OF THE PUMP WHEN YOU LEAVE THE MOTOR HOME OR WHEN IT IS UNSUPERVISED!
Data concerning wire cross section
at 10% voltage drop for connection
with 12VDC/ 10 Amps.
The length is the total length from
the power source to the pump and
to the ground.
Operation
The pumps are designed for intermittent use and operation. The pump usually operates until the preset pressure of the internal bypass.
Here, a spring loaded pressure valve opens, whereby the output-side volume flow of the pump is fed back into the input side. This allows
the pump to operate very smoothly and evenly, without „stuttering“, across nearly the entire flow range of the pump. When opening a
water faucet, the pressure drops, the internal bypass closes, and the maximum flow rate is achieved. This always allows for the best
possible flow, even with today‘s conventional water saving nozzles for shower heads, faucets, as well as shower mixer valves. The flow
rate naturally changes depending on the voltage (lower voltage = lower flow rate, higher voltage = higher flow rate). Please be careful
and always follow general electrical safety rules. When leaving your motorhome or when it’s unattended, we recommend switching off the
power supply to the pump.
TUBE SYSTEM AND CONNECTION
•
To prevent the intrusion of particles, a suitable coarse filter should be connected to the input side of the pump. Particles can damage
the pump. Such damages are not covered by the existing warranty when a suitable course filter is not installed.
•
In order to minimize vibration and noise, a suitable pressure hose with an inside diameter of at least 12 mm (1/2") and a length of
least 50 cm should be used at the inlet and outlet of the pump. To reduce vibrations and their transmission, this tubing should have a
support at the junction to rigid tubing. The pump and coarse filter should not be rigidly tubed.
ADJUSTING THE PRESSURE SWITCH
The Pressure switch and Bypass are factory-preset. In general, no adjustment should be required. If your specific operating conditions
require this, please proceed as follows:
SOFT
SERIE
®
BYPASS
The internal bypass is a spring-loaded diaphragm, which opens when the pressure increases, thereby returning a portion of the exit-side
flow rate back to the input side. For pump models with a pressure switch value of 2.80 bar [40 psi], the internal bypass is set to start to
open at a pressure of approximately 1.75 bar (25 psi) and is completely open at a pressure of approximately 3.1 bar (45 psi). The pressure
switch begins to switch off the pump at a pressure of 2.8 bar (40 psi).
For pumps with a lower pressure switch value, the bypass valves are correspondingly lower. The switch-off pressure is dependent on the
model of the pump and is set to the value specified on the label. This value lies below the maximum pressure that is reached through the
bypass. If the pressure switch is set too high, it may cause it to not switch off.
Turn the screw in the center of the pump head clockwise, to increase the switching value.
To decrease the switch-off point, turn counterclockwise. Turning the screw on the bypass increases the value at which the bypass begins
to work. Turning the screw counterclockwise will decrease the pressure range at which the Bypass is operating. The bypass should be set
so that the maximum pressure reached is approximately 0.3 bar [5 psi] above the switch-off point of the pressure switch.
If the bypass value is too low, the switch point of the pressure switch can no longer be attained and the pump will not be able to switch off.
The bypass/pressure switch combination allows the pump to adapt very well to specific conditions of the installation and no additional
pressure compensation vessel is required.
CLASSIC
SERIE
™
PRESSURE SWITCH
The cut-off pressure can be increased or decreased to a limited degree (0.5 bar / 14 psi). Slowly turn the central adjustment screw on the
housing switch clockwise (to increase pressure) or counterclockwise (to decrease pressure). Start with minor changes (max 1/2 turn).
Avoid excessive changes (fully screwing it in/out). This can permanently damage the pump.
Meter
mm² [AWG]
0-7.5
1.5 [16]
7.5-20.0
2.5 [14]
20.0-30.0
4.0 [12]
