Bc Controller Control - Mitsubishi Electric PURY-P200YLM-A(1) Service Handbook

Table of Contents

Advertisement

[5-3 BC Controller Control ]

5-3

BC Controller Control

1. Control of SVA, SVB, and SVC
SVA, SVB, and SVC turn on or off depending on the operation mode of the branch.
SVA
Port
SVB
SVC
2. Control of SVM1 snd SVM1b
SVM turns on or off depending on the operation mode.
Operation
Cooling only
mode
SVM1,1b
ON
*1. Pressure differential control: The detected differential pressure (PS1 and PS3) is controlle every minute
so as to be within a certain range.
3. Control of LEV
LEV opening (sj) is controlled as follows depending on the operation mode.
Operation mode
LEV1
G1,GA1
HA1
LEV3
type
GB1,HB1
LEV3
type
*1. Liquid level control: The liquid level detected by the liquid inlet temperature (TH11 sensor) is controlled so as to be within
a certain range.
*2. Pressure differential control: The detected differential pressure (PS1 and PS3) is controlle every minute so as to be within
a certain range.
*3. Can be 110 or more due to pressure rise on the liquid side (PS1).
*4. Superheat control: The amound of superheat that is calculated on the bypass inlet and outlet temperature (TH12, TH15)
is controlled every minute so as to be within a certain range.
4. Control of SVM2, and SVM2b
Operation
Cooling only
mode
SVM2,2b
*1. Pressure differential control: The detected differential pressure (PS1 and PS3) is controlled every minute so as to be
within a certain range.
HWE1314A
Cooling
ON
OFF
ON
Cooling main
Heating only
Pressure dif-
ferential con-
*1
trol
Cooling only
2000
Liquid level
control
Superheat
ferential
*4
control
control
Superheat
Superheat
*4
control
Cooling main
OFF
OFF
Mode
Heating
Stopped
OFF
OFF
ON
OFF
OFF
OFF
Heating main
OFF
OFF
Cooling
Heating only
main
110
*1
dif-
Pressure dif-
ferential con-
*2
*2
trol
60
*4
control
Heating only
Heating main
Pressure differ-
Pressure differ-
*1
ential control
ential control
- 152 -
Defrost
OFF
OFF
OFF
Defrost
Stopped
ON
OFF
Heating
Defrost
main
*3
110
2000
Pressure dif-
G1:1000
ferential con-
GA1,HA1:2000
*2
trol
60
60
Defrost
OFF
*1
Stopped
1200
60
60
Stopped
OFF
GB

Advertisement

Table of Contents
loading

Table of Contents