20
(1) LEV opening correction by suction superheat (COOL, DRY)
(Suction superheat) = (Minimum gas pipe temperature) - (Evaporation temperature)
When COOL and DRY , correct the LEV openings corrected from the table below
(2) Separate correction (COOL,DRY)
(When number of operation unit is 2 units or more)
(a) Correction by the separate superheat
Correct the LEV separately by temperature difference between each gas pipe temperature thermistor and evaporator
temperature thermistor.
1
Calculate each superheat of the unit from the expression below;
(Superheat) = (Gas pipe temperature thermistor) - (Evaporation temperature thermistor)
2
Select a minimum superheat from among them.
3
Each LEV opening is corrected by difference between each superheat and minimum superheat.
Suction superheat (S.H.)
LEV opening
correction (pulse)
more than 12
10 to12
8 to 10
6 to 8
6 or less
6
4
3
2
0
1
Suction superheat
(MIN gas pipe temperature thermistor - Evaporation temperature thermistor)
2
Each correction
w
1
• (Each gas pipe temperature thermistor - Evaporation temperature thermistor)
• (Main pipe temperature thermistor - sub pipe temperature thermistor)
w
1 Perform this, when number of operation units is 2units or more
w
2 When the correction opening of suction superheat is 0, correct the LEV opening by discharge temperature.
3
Discharge temperature
COOL
DRY
HEAT
•
•
-
•
w
2
•
w
2
•
<Correction>
OB287B--1.qxp 06.6.7 11:13 AM Page 20
Summary of Contents for MXZ-24UV
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