Wine Guardian SP25 Installation, Operation And Maintenance Manual page 32

Examples of adjustments: (Less than 25'/7.62 meters): If a WGS40 system that is only
15'/4.57 meters (10'/3.05 meters less than factory charge baseline from table above) in
total length. At .50oz/foot & .0465kg/meter adjustment, that equals a decrease in total
system charge from factory baseline of 5oz /.142kg. Now a total system charge of
53oz/1.498kg. You then can subtract the initial factory charge of 16oz/.453kg from this
new total, and that is the amount you ADD to the system upon start-up.
In this example = 37oz/1.045kg ADDED
(Greater than 25'/7.62 meters): If a WGS40 system that is 35'/10.67 meters (10'/3.05
meters greater than factory charge baseline from table above) in total length. At
.50oz/foot & .0465kg/meter adjustment, that equals an increase in total system charge
from factory baseline of 5oz /.142kg. Now a total system charge of 63oz/1.78kg. You
then can subtract the initial factory charge of 16oz/.453kg from this new total, and that is
the amount you ADD to the system upon start-up.
In this example = 47oz/1.327kg ADDED
Additional Charge for Extreme Climate Protection/XLA Option Systems
For systems that have Wine Guardian's Extreme Climate Protection/XLA Option
installed. Add the following additional charge to the system.
SP25
Once the system has been charged, compare the high side system pressure to the
"discharge line pressure" found below in the "Split System Operations Chart" for proper
operation. If actual discharge pressures do not match the chart, then compare
subcooling values as additional charge may be needed.
Split System Operations Chart
*** Operation data is based on typical wine cellar conditions of 57°F (14 Deg C)
DB/49°FWB (55%RH)
OD Ambient (F) Suction (psig)
10 ºF / -12 ºC
40 ºF / 4 ºC
60 ºF / 15 ºC
70 ºF / 21 ºC
80 ºF / 26 ºC
100 ºF / 37 ºC
115 ºF / 46 ºC
SP25
Discharge (psig)
21 100
24 104
24 107
24 108
24 108
27 150
30 190
4.0 oz
Suction Sub-cooling (F)
Superheat (F)
7 ºF / -14 ºC 23 ºF / -5 ºC
13 ºF / -10 ºC 24 ºF / -4 ºC
22 ºF / -5 ºC 20 ºF / -6 ºC
25 ºF / -4 ºC 18 ºF / -7 ºC
31 ºF / -1 ºC 16 ºF / -8 ºC
38 ºF / 3 ºC 19 ºF / -7 ºC
40 ºF / 4 ºC 21 ºF / -6 ºC
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