SERVICE MANUAL
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Service manual V1.08 | Nov-2015 | LM0002-EN
Page 22 of 97
NOTE:
“Service” mode can be controlled only locally, via device LCD panel.
Details are documented in “KNX bus communication” section 6.
For examples of KNX communication see section 6.4.
3.4
Bottom drain recirculation
3.4.1
Overview
With the installation of a push-pull 3-way valve or any combination of 2-way valves, the water can flow
either over the skimmer, overflow channel or over the bottom drain. This is useful especially for outdoor
pools when the low outside temperature can cool down the water temperature. Energy loss can be
reduced, when the water doesn’t flow over the channel or skimmer. This option can work in 3 scenarios:
Automatic mode – when enabled (see section 0), bottom drain valve will switchover when
the following conditions will apply:
o
Pool cover is installed and closed
o
Outside temperature is lower than water temperature
Custom timer – when custom timer is defined (see section 0), bottom drain valve can
switchover during defined schedule. This is useful when cover is not installed or in case
the Automatic mode cannot be used.
In combination with pool cover drain – when the bottom drain and pool cover drain (see
3.8.2.3 for details) is enabled, the bottom drain will open when cover will be closed. This
is to ensure circulation on overflow edge pool when the water level is decreased by the
pool cover drain.
NOTE:
This option can be used only with push-pull backwash valve type (read details in section 3.11).
With an installed multi-port (6-way) valve this option cannot be used!
3.4.2
Electrical connection
The device has a powered relay output (230V AC,
50/60 Hz) and enables direct switching of small
loads. This enables to connect push-pull (like
Besgo) or similar valve from any vendor with 230V
coil. Built-in circuit breaker has “LVLØ System” sign
on devices front panel. Example of connecting a
Besgo 3-way valve is on a picture bellow. Connect
terminals of “6 WAY VALVE” output to the valve
using two wires:
CLOSED – (L1) to valve coil phase L
N - to valve coil neutral N
3.4.3
Configuration
Setup of bottom drain option has to be performed via LVLØ mobile application in Service section; select
Basic setup. Relevant settings are:
Bottom drain control: <installed/not installed> Enable or disable the bottom drain feature. The water can
flow either over the skimmer, overflow channel or over the bottom drain. This is useful especially for
outdoor pools when the low outside temperature can cool down the temperature of the water.
