Solar Storage Tank
The Solar Storage Tank shall be glass lined steel, stainless steel or polymer construction. Tank in-
sulation shall be R-12 or higher. The maximum working temperature shall be no less than 180oF
and the maximum working pressure shall be no less than 75 psi.
Circulator Pumps
The circulator pump shall be a wet rotor small circulator with a cast iron, stainless steel, brass or
polymer body and a metal or polymer impeller. The pump motor shall be induction or permanent
magnet ECM driven. The pump shall be rated for: maximum fluid temperatures of no less than
180
°
F and pressures of no less than 125 PSI. The maximum rated amperage shall be no more than
1.5 Amps and the maximum rated power draw shall be no more than 135 Watts.
Thermostatic Mixing Valve
The thermostatic mixing valve shall have a bronze, brass or stainless steel body with a rated maxi-
mum working temperature no less than 200oF and a rated maximum working pressure no less than
125psi. The range of temperature set points shall be at least 18ºF (10ºC) and shall include a set
point of 120ºF (50ºC). The Thermostatic Mixing valve shall be third party listed and certified to one
of the following ASSE standards: ASSE 1016; ASSE 1017; ASSE 1070.
Ball Valves
Ball valves shall be of bronze, brass or stainless steel construction. Maximum working temperature
shall be no less than 200
°
F and maximum working pressure shall be no less than 125 psi.
Three-Way Valves (Optional)
Three-Way valves shall be of bronze, brass or stainless steel construction. Maximum working tem-
perature shall be no less than 200
°
F and maximum working pressure shall be no less than 125 psi.
Boiler Drains (A.K.A. Charge Valves; Fill Valves; Drain Valves)
Boiler Drains shall be of bronze, brass or stainless steel construction. Maximum working tempera-
ture shall be no less than 200
°
F and maximum working pressure shall be no less than 125 psi.
Pressure Relief Valve
The pressure relief valve shall be of bronze, brass or stainless steel construction with a pressure
setting between 30psi and 150psi. The pressure relief valve shall be set to discharge at a pressure
below the maximum design pressure of all other components in the collector loop.
Thermometers (Optional)
Thermometers shall be dial or scale type and shall have a metallic body and casing and a glass
lens. The range of measurement shall be not less than 30oF to 200oF with an accuracy of +/- 2%.
An electronic temperature sensing system may be used in place of dial or scale thermometers (see
below).
Temperature Sensors (Electronic)
An electronic temperature sensing system may be used in place of dial or scale thermometers.
Temperature sensors shall be shall be of metallic construction and have a maximum temperature
APPENDIX A
Summary of Contents for CASCADE 2
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