Blue Box - 39
4.9.8 Connection of Sigma 2002 LC/HP units to a remote air cooled condenser.
In motoevaporating units LC/HP during the winter operating mode (heat pump), the finned coil of the remote
condenser operates as an evaporator; the refrigerant pipes connecting the remote condenser/evaporator will
therefore need to have an increased diameter.
If the remote condenser is supplied by Blue Box, the installer make the connection between the defrost tempera-
ture sensor terminals (inside the electric box) and the thermostat terminals inside the electric control box of the
motoevaporating unit (see the electrical diagram).
If the remote condenser is not supplied by Blue Box, the defrost is controlled only by the evaporating pressure (for
more information see the paragraph “Defrost”) and there is not a temperature sensor on the remote condenser.
TABLE 2 - PIPE DIAMETER FOR VERSIONS LC
MODEL
SIGMA 2002/LC
Delivery Liquid Delivery Liquid Delivery Liquid
[mm] [mm] [mm] [mm] [mm] [mm]
3.2 22 16 22 16 22 16
4.2 22 18 22 18 22 18
5.2 22 18 22 18 28 18
6.2 28 22 28 22 28 22
7.2 28 22 28 22 28 22
8.2 28 22 28 22 28 22
9.2 35 28 35 28 35 28
10.2 35 28 35 28 35 28
12.2 35 28 35 28 35 28
13.2 35 28 35 28 35 28
14.4 28 22 28 22 28 22
16.4 28 22 28 22 28 22
18.4 35 28 35 28 35 28
20.4 35 28 35 28 35 28
24.4 35 28 35 28 35 28
26.4 35 28 35 28 35 28
30
Diameter connection pipes between unit
Distance between unit and remote air cooled condenser [m]
and remote air coole condenser
10 20
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