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 Drain enough fluid to drop the system pressure down to the recommended pressure
from Table 5-4. Be sure to add one-half PSI for every 1000 feet of altitude above
sea level.
It may be desirable to use the charging pump to return fluid from the bucket into the
original container. Disconnect and drain the hoses.
Determining the Final Fill Pressure
To use the fill pressure chart, determine the following:
o
the
total fluid volume of the system
o
the
number and size of the expansion tanks
o
the
temperature of the system fluid, during the charging process
o
the
system's elevation above sea level, to the nearest thousand feet
TABLE 5-4: Component Fluid Capacities
Fluid Capacity
Component
1.00 gallon
Typical 3' by 8' collector
1.25 gallons
Typical 4' by 8' collector
1.50 gallons
Typical 4' by 10' collector
0.012
gallons
1/2" copper tubing (per foot)
0.025
gallons
3/4" copper tubing (per foot)
0.042
gallons
1" copper tubing (per foot)
0.065
gallons
1 1/4" copper tubing (per foot)
0.093
gallons
1 1/2" copper tubing (per foot)
0.161
gallons
2" copper tubing (per foot)
0.18 gallons
15' coil-in-tank heat exchanger
0.24 gallons
20' coil-in-tank heat exchanger
multiply shell diameter in
Typical shell and tube heat
inches times shell length in
exchanger
inches times 0.02 gallons
multiply heat exchanger length
Typical tube-in-tube heat
in feet times 0.03 gallons
exchanger
REPAIR
5.2 REPAIR PROCEDURES
185
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