11
Rigid 3 x 1 or 1.5 power supply cable preparation
The conductor wires should be stripped bare by 7 mm.
Prepare and put in place the conductor wires ensuring provision
for movement of the electrical box, without straining the existing
wiring.
Proceed in the same way for the connection to the wall mounted controls
300 mm
7 mm
25 mm
All the connections are made to screwless terminals. To thread in the conductor wires,
use a 3.5 x 0.5 mm screwdriver blade as illustrated below.
12.1. CHANGE OVER SENSOR CONNECTION (MODELS 2 PIPES)
Depending on the season, the cassette units are either supplied with hot water in winter or with chilled water in
summer and during the mid season periods.
A 3-way valve must be installed on the water circuit supplying
the unit.
²
Summer and mid-season: The
3 way valve
is controlled by the thermostat to obtain cooling.
²
Winter: The
3 way valve
is controlled by the thermostat to obtain heating.
CHANGE OVER SENSOR
The change over sensor supplied in the unit is to be located
on the water inlet pipe
. It enables the thermostat
action to be reversed in relation to water temperature.
12.1.1. THERMOSTAT INSTALLATION
The thermostat is already wired up at the factory.
1. Shut off the unit’s electrical power supply.
2. Fit the thermostat on the water inlet pipe.
3. Cover the connection with a protective
sheath.
INSULATE IMPERATIVELY
Temperature effect: T° < 15 °C - T° > 30 °C.
Summary of Contents for K 12 OG LN
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