Owner’s Manual
Quantum Energy Technologies
Document number: QDC0030PD-16.4 Page 31 of 36
A.8: Signs Of Correct Charge
During normal operation with the correct amount of refrigerant gas, the sight glass should show clear
liquid. A very few small bubbles may be present when the system is started or when the TX valve opens
quickly. But it should return to clear liquid shortly after. Current draw and delivery pressure will be within
the nominal range and temperatures should be consistent with gas properties. Correct amount of charge is
listed in the Table A10.
A.9: Signs Of Undercharge
When bubbles through the sight glass persist for a significant time or repeat frequently then it is a sign of
refrigerant undercharge. This can be confirmed by a low current draw together with low pressures. Note
that unusual current draw could also be a sign of other defects in the system. If the sight glass shows clear
gas (not liquid), current draw is too low and discharge gas is not hot or suction pressure too low then the
system is nearly or totally empty.
Note that low suction pressure could also indicate a blockage in low-pressure side or a closed TX valve.
A.10: Signs Of Overcharge
Continuous liquid through sight glass: Assuming TX valve is functioning normally, evaporator tends to
flood, head pressure tends to be high, current draw is high and compressor is noisy.
A.11: Technical Data For Service Personnel – Mitsubishi Compressors – R134a
Parameters
150/200-08ACW-134
150/200-08ASW-134
270/340-11AC3/4-134
270/340-11AS4-134
340-17ACW-134
340-17ASW-134
(340-TIH-134)
TX valve & Setting
Danfoss TDEN1.1TR
1 1/4 turns clockwise
from factory setting
Danfoss TDEN1.1TR
1 turns clockwise from
factory setting
Danfoss TEN2 + #2
3 1/2 turns from full open
Danfoss TEN2 + #3
3 1/2 turns from full open
Danfoss TEN2 + #4
Factory setting
Emerson AAE 2MC
8 turns from full open
Emerson AAE 2MC
7 turns from full open
Winding Resistance
@20
℃
C-R: 2.13Ω,C-S: 3.91Ω
C-R: 0.96Ω, C-S: 1.77Ω
Run Capacitor
30μF (+10, -5%)
370VAC
30μF (+10, -5%)
370VAC
60μF (+0, -15%)
400VAC
Rated power supply 220-240VAC, 50Hz
220-240VAC, 50Hz
220-240VAC, 50Hz
Rated
circuit
breaker
1Φ, 10A
1Φ, 15A
1Φ, 15A
De-ice
control
setting
On -5
℃
, Off +8
℃
(Timed De-icing)
On -5
℃
, Off +8
℃
(Timed De-icing)
On -5
℃
, Off +8
℃
(Timed De-icing)
Liquid
injection
capillary
ID 0.6mm x 1.5m
ID 1.1mm x 2.9m
ID 1.1mm x 2m
Liquid
injection
thermostat
On at 85
℃
, Off at 75
℃
On at 85
℃
, Off at 75
℃
On at 85
℃
, Off at 75
℃
Water temperature
setting
58
℃
/8
℃
(Del.
≥
60
℃
)
58
℃
/8
℃
(Del.
≥
60
℃
) 60
℃
/8
℃
(Del.
≥
60
℃
)
Refrigerant charge
1650g
1850g
1900 g
2650g
Thermal
cut-out
setting
105
℃
, manual reset
105
℃
, manual reset
105
℃
, manual reset
