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Electronic Expansion Valve Overheating Controller EC3-X33
Main Parameters – change if other settings are desired
Code
Parameter description and options
Password
H5
Coolant:
u0
0 = R22 1 = R134a 2 = R507 3 = R404A 4 = R407C 5 = R410A 6 = R124
7 = R744 (subcritical conditions)
The used sensor type:
uP
0 = PT4-07M (for R22/R134a/R507/R404A/R407C/R124) 1 = PT4-18M (for R410A)
2 = PT4-30M (for R744, subcritical)
The used valve type:
ut
1 = EX4 2 = EX5 3 = EX6 4 = EX7 5 = EX8
Additional properties (set if necessary)
uu
Initial opening of the valve (%)
u9
Valve opening time (seconds)
Low overheating reporting
uL
0 = N/A (for flooded evaporator) 1 = Yes with auto-reset
switches at 0.5K (if it lasts 1 min); switches immediately at 3K
Rated overheating (K)
If uL used (auto run)
u5
If uL not used
MOP function
u2
0 = Yes 1 = No
MOP settings (°C), saturated temperature
Set by the manufacturer according to the used coolant.
u3
+13°C for R22 +15°C for R134a +7°C for R507 +7°C for R404A +15°C for R407C+15°C for R410A
+50°C for R124
Used units (only for u3, u5,
5
0 = °C, K, bar 1 = °F , R, psig
(Psig is divided by 10 - example: displayed 12.5 equals 125 psig)
Displayed value
1
0 = measured overheating
3 = measured water output temperature 4 = calculated evaporation temperature (°C) from measured pressure
Overheating control method
u4
0 = normal, 1 = slow
Action of the battery if it fails.
b1
(only for EC3-X33), according to the table:
Number
0
1
2
3
If b1 is set to 0 or 1, the user must ensure suitable protection to protect the system against failures
caused by power supply breakdowns.
*) Maximum and minimum values are dependent on the coolant type
1
1 = measured evaporating pressure, (bar); 2 = valve opening (%),
Display
Failure relay
–
–
Ab
–
Ab
switches
Ab (flashes)
switches
Control units VCS
Min.
Max.
1
199
0
7
0
1
1
5
2 = No with manual reset
Valve
Reset option after replacement
controls
controls
fully closed
fully closed
Factory
Actual
settings
settings
12
1
0
5
10
100
50
1
30
5
0
2
1
3
30
6
0.5
30
6
0
1
1
*
*
X
0
1
0
0
4
0
0
1
0
0
–
–
automatically
manually
107
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