Emerson dixell XC650CX User Manual

1592001431 XC650CX GB r3.5 21.07.2020 XC650CX 35/56
20.1 Regulation with screw compressors like Bitzer/ Hanbell/
Refcomp etc
Screw compressors like Bitzer use up to 3 valves for the power regulation.
20.1.1 Relay activation
ES. Compressor with 4 steps:
oA1 = CPr1; oA2 = StP; oA3 = StP; oA4 = StP; CtyP = Scr
a. Activation with valves ON due to voltage presence (StP=cL).
oA1 = Screw1
oA2 = StP
oA3 = StP
oA4 = StP
Step 1 (25%)
ON
ON
OFF
OFF
Step 2 (50%)
ON
OFF
ON
OFF
Step 3 (75%)
ON
OFF
OFF
ON
Step 4 (100%)
ON
OFF
OFF
OFF
b. Activation with valves ON due to voltage absence (StP=oP).
C1 = Screw1
C2 = stp
C3 = stp
C4 = stp
Step 1 (25%)
ON
OFF
ON
ON
Step 2 (50%)
ON
ON
OFF
ON
Step 3 (75%)
ON
ON
ON
OFF
Step 4 (100%)
ON
ON
ON
ON
21. Fan regulation
The fan regulation band Pb is divided by the number of fans:
The numbers of fans switched ON is proportional to the value of the input signal: when this
distances itself from the target set point and enters the various bands, the fans are switched ON,
to be then turned OFF when the signal brings near the set point.
In this way if the pressure is greater than regulation band, all the fans are on, if the pressure
(temperature) is lower than the regulation band all the fans are off.
Naturally also for this regulations all the delays (Fon and FoF) are valid.
Regulation according to the running hours
The algorithm switch on and off the loads according to the running hours of each load. In this way
the running hours are balanced.
Example
4 Fans: oA2 =FAn; oA3 = FAn; oA4 = FAn; oA6 = FAn:
rot = yES rotation enabled

Emerson dixell XC650CX Specifications

General

Brand	Emerson
Model	dixell XC650CX
Category	Controller
Language	English