108
SS-SVX11K-EN
Table 32.
Thermal expansion valve manufacturer settings - no bleed — Danfoss
Standard off the shelf nominal valve settings
Valve
Body size
SHT, °F
CW turns
available
CCW turns
available
Superheat
change per
turn
Field adjust
for 18°F (DX
evap coil)
Field adjust
for 15°F
(EVP only)
TGEL 3.5 TR
TGE 10
14.4
4
3
4.5°F
.75 CW
—
TGEL 4.5 TR
TGEL 6.5 TR
TGEL 9 TR
TGEL 13 TR
TGEL 15 TR
TGE 20
7
3
1.25 CW
.25 CW
TGEL 19 TR
TGEL 23 TR
TGEL 31 TR
TGE 40
4
TGEL 35 TR
TGEL 46 TR
Information in tables above is approximate and
intended to simplify field adjustment by presetting
valves to approximately 18°F superheat for DX evap
coils and 15°F superheat for EVP chillers. Actual
operating superheat will typically be less than 18°/15°F
and varies depending on many factors including those
listed above. Superheat gradient (superheat change
per turn) is also approximate and will not be constant
throughout the valve adjustment range. Check
superheat after startup to confirm proper control.
Tag or mark valve to keep a record of any field
adjustments.
Adding Preliminary Charge
1. Leak check must be completed and system
evacuated.
2. Verify that oil levels are near or above the top of all
compressor sight glasses.
W
WA
AR
RN
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H
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de
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erriio
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D
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nn
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utt//tta
ag
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3. Insure field supplied unit disconnect is "OFF". Then
verify that the unit 1S2 115 volt control circuit
switch is "OFF" and that reset relays 1K21 & 1K22
have been unplugged to prevent inadvertent
compressor starts.
4. Turn field supplied unit disconnect "ON" to energize
crankcase heaters. Verify crankcase heaters are
operating.
5. Verify that discharge, suction, and liquid line
service valves are open. Liquid line service valve
must be closed 1/4" turn from full open to allow for
fan pressure switch operation.
6. If system is equipped with hot gas bypass, insure
hot gas bypass is closed and remains closed during
charging.
7. Refer to table below for the charge estimate for the
condensing unit circuit and piping at the
appropriate piping length.
Table 33.
Approximate charge per circuit (lbs)—
condensing unit and lines only
(does not include evaporator)
Unit
Size
Total Interconnecting Line Length (ft)
50
100
150
20
19
25
32
25
25
37
50
30
25
38
50
40
25
37
50
50
25
38
50
60
24
36
48
80
49
69
88
100
52
73
94
120
55
76
98
