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 Spare Parts List
The exact number of spare parts depends on the number, size and types of
systems. Experience has shown a range of inventory levels appropriate for each
component. The following percentages are based on the total number of that
component on base, not the number of systems.
An asterisk indicates that at least one of that component should be in stock at all
times, regardless of the number of systems or components in service, as long as
that component is used on at least one system.
The minimum quantity of solar fluid is the amount required to refill the largest
system.
TABLE C-3: Recommended Spare Parts List
Percentage Range
Component
0.3%
-
5.0%
Collector Glazings, with Gaskets*
1.0%
-
3.0%
Complete Collectors, or Absorbers*
2.5%
-
10.0%
Collector Sensors*
2.5%
-
5.0%
Storage Sensors*
5.0%
Differential Thermostats*
2.5%
-
1.5%
-
5.0%
Wet Rotor Pumps (or Cartridges)
1.5%
-
3.0%
Solar Loop Dry Rotor Pumps
3.0%
Storage Loop Dry Rotor Pumps
1.0%
-
Tempering Valves*
2.0%
0.5%
-
Pressure Relief Valves*
2.0%
0.5%
-
1.0%
-
3.0%
Pressure and Temperature Relief Valves*
2.0%
-
5.0%
Check Valves*
4.0%
2.5%
-
Heat Exchangers
Expansion Tanks*
1.5%
-
4.0%
Draindown Control Valves*
5.0%
-
25.0%
10.0%
Gallons of Solar Fluid*
5.0%
-
APPENDIX C
C-5
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