CIAT XtraConnect 2 - 19.3 Condensing pressure control on 3-circuit machines

EN - 52
Refrigerating circuit 2 Refrigerating circuit 1
Circuit 2 0-10V output Circuit 1 0-10V output
For speed control
2 ‘common’
1 ‘common’
Common 0-10V output
Refrigerating circuit 2 Refrigerating circuit 1
Circuit 2 0-10V output Circuit 1 0-10V output
For speed control
Refrigerating circuit 2 Refrigerating circuit 1
Circuit 2 0-10V output Circuit 1 0-10V output
For speed control
2 ‘common’
1 ‘common’
Common 0-10V output
 LX 3050 - 3500 with one stage of two or three fans plus one speed-controlled common fan and three stages of two or three fans plus one
on/off common fan per circuit:
 LX 3600 – 3900 with one stage of three fans plus one speed-controlled common fan and three stages of three fans plus one on/off common
fan per circuit:
 LX 4200 to 4800 with one stage of four speed-controlled fans and three stages of four on/off fans per circuit:
19.3 Condensing pressure control on 3-circuit machines:
Three-circuit machines are always made up of two separate modules (machines), each with its own circuits. Module 1 has two circuits and
module 2 has one circuit. Their designations are provided in the table below:
Sizes
Module
Number
of V-frame
modules
Standard condensation pressure control (fan assignments) Speed control option
Number Reference Stage 1 Stage 2 Stage 3 Stage 4 Stage 5 Stage 6
Controlled
stages
On/Off
stages
4850
1 3050 6 Same as table in previous section.
2 1800 4
MC31
MC33
MC35 MC37 MC32 MC34
MC36
MC38
1- 2- 3 4 -5 - 6
5400
1 3600 7 Same as table in previous section.
2 1800 4
MC31
MC33
MC35 MC37 MC32 MC34
MC36
MC38
1- 2- 3 4 -5 - 6
6000
1 4200 8 Same as table in previous section.
2 1800 4
MC31
MC33
MC35 MC37 MC32 MC34
MC36
MC38
6600
1 4800 8 Same as table in previous section.
2 1800 4
MC31
MC33
MC35 MC37 MC32 MC34
MC36
MC38
1- 2- 3 4 -5 - 6