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(©October, 2006)
CyberChiller Series Installation, Operation & Maintenance Manual
2-4
NOTE
In the following (3) charts, the line sizes repre-
sent the sizing for individual refrigeration circuits.
CyberChiller units have two separate pairs of re-
frigeration lines. (One per compressor.)
*Equivalent Ft. accounts for the linear pipe length as well as
equivalent length of Valves, Elbows & Tee’s as shown in the
previous chart.
Equivalent Length (ft) of Straight Pipe
OD (In.) Globe Angle 90º 45º Tee Tee
Line Size Valve Valve Elbow Elbow Line Branch
1/2 9.0 5.0 0.9 0.4 0.6 2.0
5/8 12 6.0 1.0 0.5 0.8 2.5
7/8 15 8.0 1.5 0.7 1.0 3.5
1-1/8 22 12 1.8 0.9 1.5 4.5
1-3/8 28 15 2.4 1.2 1.8 6.0
1-5/8 35 17 2.8 1.4 2.0 7.0
2-1/8 45 22 3.9 1.8 3.0 10
2-5/8 51 26 4.6 2.2 3.5 12
3-1/8 65 34 5.5 2.7 4.5 15
3-5/8 80 40 6.5 3.0 5.0 17
NOTE
Vertical runs are based on a total rise of 30 equivalent
feet. For longer sizes, individual calculations must be
made. Sizes assume the use of single risers; double
risers may be necessary.
*Equivalent Ft. accounts for the linear pipe length as well as
equivalent length of Valves, Elbows & Tee’s as shown in the
previous charts.
2.5.2.2 Water/Glycol Fluid Cooled Systems
Piping connections for the water/glycol fluid coolers
are sweat connections. (See Figure 4.) Pipe sizes
may not necessarily be the same as the unit connec-
tion. Piping should be sized to match the system
pressure drop and pump capacity and may require a
reducing fitting to match the connection size on the
pump package and CyberChiller.
Copper is adequate for closed loop systems and
ground water which is not high in mineral content and
is pH neutral. In situations where scaling could be
heavy, or where biological growth will be present, a
closed loop system is recommended. Untreated water
in the unit heat exchangers may cause, over a period
of time, a loss of heat exchange capacity due to a
mineral deposit build-up inside the exchanger. Only a
qualified service mechanic should clean these.
Glycol-cooled systems with low entering fluid tempera-
tures should have insulated piping. The recommended
ethylene glycol solution ratio is 40% glycol to 60%
water. (SATS recommends Dowtherm SR1 manufac-
tured by Dow Chemical Co.) Use only ethylene glycol
with inhibitors for corrosion protection.
Recommended Liquid Line Sizes
(For R-22 or R-407C Refrigerant)
Model No./ Receiver to Evaporator
(Equivalent Ft.)*
Total Unit
50' 100' 150'
Capacity or less or less or less
120 / 120,000 1/2 5/8 5/8
210 / 210,000 5/8 7/8 7/8
260 / 260,000 7/8 7/8 7/8
320 / 320,000 7/8 7/8 7/8
Recommended Discharge Line Sizes
(For R-22 or R-407C Refrigerant)
Model No./
Equivalent Length Ft.*
Total Unit
50' 100' 150'
Capacity or less or less or less
120 / 120,000 7/8 1-1/8 1-1/8
210 / 210,000 1-1/8 1-1/8 1-3/8
260 / 260,000 1-1/8 1-3/8 1-3/8
330 / 330,000 1-1/8 1-3/8 1-3/8