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