Velux CLI U12 SD0(W/L/F/P) 118 El B/U User Manual

8 – Part 3: Solar water heater system installation – VELUX solar water heating system with boiler back-up
VELUX solar water heating system with boiler back-up
System models: CLI U12 SD0(W/L/F/P) 119 HX B/U
CLI U12 SK0(W/L/F/P) 219 HX B/U
CLI U12 SK0(W/L/F/P) 319 HX B/U
Notes:
1. This drawing is meant to show a system piping concept only. The installer is responsible for all equipment and detailing by local codes.
2. Anti-freeze, non- potable heat transfer fl uid shall be used for the solar storage tank heat exchanger circuit only. Never introduce Anti-freeze solution to any
other solar storage tank connection other than the solar heat exchanger.
3. If there is a check valve on the cold water feed line, a thermal expansion tank suitable for potable water must be sized and installed within this piping system
between the check valve and the cold water inlet of the solar water heater.
4. The an anti-scald mixing valve provided must always be installed as shown.
5. Circulators shown in the hydronic boiler piping above should have an integral fl ow check or alternately use a stock pump with an external spring type check
valve. (Circulators with integral fl ow checks are not to be used in solar systems due to extreme temperatures.)
1. Collectors
2. Flashing/racking
3. Connector tube
4. Flextubes
5. Air Separator
6. Pump station/controller
7. Expansion tank
8. Solar storage tank
9. Mixing valve
10. Temperature sensor
11. Auxiliary heat exchanger
12. Backup heat source
provided by another
installation
8.
12.
11.
7.
6.
5.
9.
4.
2.
3.
1.
10.
4.
4. 4.
Cold water
Cooled glycol
Hot water
Heated glycol

Velux CLI U12 SD0(W/L/F/P) 118 El B/U Specifications

General

Brand	Velux
Model	CLI U12 SD0(W/L/F/P) 118 El B/U
Category	Heating System
Language	English