Lennox EMEA FRIGA-BOHN DUO CU 114, Installation Instructions Manual

Page: 33 / 72

DUO CU
-
33/72 -
GB

R450 Values
Pressure switch setting sheet
Designation Abbreviation Temperature °C Cut-off in bar Interlocking in bar
General safety LP switch
BPG -26,0 0,02 0,72
Compressor safety HP switch 1
HPS1 68 17,00 13,00
Regulated LP switch 1
BPR1 -8 0,47 1,17
Compressor safety HP switch 2
HPS2 68 17,00 13,00
Regulated LP switch 2
BPR2 -9 0,39 1,09
LP frame switch
BPE 2,0 1,45 2,1
HP frame switch
HPE 50,0 8,18 12,2

Adjust the thermal magnetic circuit breakers GV(x) according to the values shown in the wiring diagram on page 6
or 7

Disconnect all circuit-breakers in the electrical cabinet

Set the KT7 delay time to 30 minutes, ie the top slider for 6 to 60 minutes and the bottom slider on 5

Set the KT1 delay time to 6 minutes, ie the top slider for 1 to 10 minutes and the bottom slider 6

Set the KT2 delay time to 7mn, ie the top slider for 1 to 10 min and the bottom slider 7

Equip yourself with your electrical PPE

Close the main disconnect switch

Check the voltage before and after of the disconnect switch and before of all circuit-breakers

Using the phase controller check the order of these, the direction must be clockwise otherwise the compressors
will be irreversibly damaged.

Close the control circuit breaker Q77 (both condenser fans will run after 30 minutes if the low pressure (LP) is
higher than the BPE switch-on value. To avoid this, lower the LP
pressure below the BPE and the HP pressure below
HPE)

Close transformer circuit breaker QF2

Adjust the fluid used in the P RACK controller by following the instructions below