10 – Part 3: Solar water heater system installation
VELUX solar pre-heat water heating system
System models:
CLI U12 SD0(W/L/F/P)118 AUX EL
CLI U12 SD0(W/L/F/P)118 AUX GAS
CLI U12 SK0(W/L/F/P)218 AUX EL
CLI U12 SK0(W/L/F/P)218 AUX GAS
CLI U12 SK0(W/L/F/P)318 AUX EL
CLI U12 SK0(W/L/F/P)318 AUX GAS
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 fluid 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 storage tank.
4.
The anti-scald mixing valve provided must always be installed as shown.
5.
For all electric back-up models, make sure solar storage tank is fully purged of air before power is turned on to the back-up heat source.
8.
11.
6.
5.
9.
12.
12.
12.
4.
2.
3.
1.
10.
4.
4.
4.
Cold water
Cooled glycol
Hot water
Heated glycol
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. Anti-scald mixing valve
10. Temperature sensor
11. Existing gas or electric
water heating
12. Solar system bypass
valves
7.