Velux CLI U12 SD0(W/L/F/P) 1110 NG B/U, Instruction Manual, Page: 2 / 50

2 – Contents
Contents
Part 1: Product and safety information
Page – 3
− Defi nitions Page – 3
− Local installation regulation Page – 3
− Water temperature adjustment Page – 3
Part 2: General information
Page – 4
− Preface Page – 4
− Introduction Page – 4
− System description Page – 4
− Specifi cations Page – 4
− Collectors and fl ashings Page – 4
− Solar storage tank Page – 5
− Collector loop piping Page – 5
− Pump station controller Page – 5
− Other system components Page – 5
Part 3: Kit installation
Page – 6
− Installation check list Page – 6
− VELUX solar water heating system with electric back-up Page – 7
− VELUX solar water heating system with boiler back-up Page – 8
− VELUX solar pre-heat water heating system Page – 9
− VELUX solar system components Page – 10
− Solar collector orientation Page – 13
− Collector installation Page – 13
− Collector location on 16” o.c. rafters Page – 14
− Collector location on 24” o.c. rafters Page – 15
− Flashing installation Page – 19
− Solar storage tank and pump station controller location Page – 20
− Inspection of solar storage tank Page – 21
− Solar storage tank and pump station controller installation Page – 21
− Solar loop piping to collectors Page – 22
− Solar loop piping to heat exchanger Page – 22
− Tank temperature sensor installation Page – 23
− Tank and collector temperature sensor connection to
pump station controller Page – 23
− Expansion tank installation Page – 23
− Boiler back-up heat exchanger connection Page – 24
− Boiler loop circulator sizing Page – 24
− Boiler loop control Page – 24
− Electrical connection Page – 25
− Potable water piping Page – 26
− Solar loop and potable water piping insulation and support Page – 26
− Freeze protection Page – 26
− Thermostat adjustment Page – 27
− Combination – Thermostat and high limit control (ECO) Page – 27
− Charging the potable water system Page – 27
− Commissioning the solar system Page – 28
− Programming system controller Page – 29
− System controller operation Page – 29
Part 4: Maintenance
Page – 30
− Maintenance check list Page – 30
− Shut down procedures Page – 30
− Vacation planning Page – 30
− Estimated life of components Page – 31
Part 5: Specifi cations
Page – 32
− VELUX solar collector Page – 32
− VELUX fl extubes and connections Page – 33
− VELUX glass lined solar storage tanks Page – 34
− VELUX solar pump station Page – 37
− VELUX heat transfer fl uid – Inhibited propylene
glycol-based heat transfer fl uid Page – 38
− Testing your fl uid’s pH level Page – 38
− Spill, leak and disposal procedures for propylene glycol Page – 38
− Propylene glycol emergency overview Page – 39
Part 6: Component lists
Page – 40
− VELUX solar system kits Page – 40
− VELUX pump station controller Page – 44
Part 7: Troubleshooting
Page – 45
VELUX solar SRCC OG-300 label set
Page – 47
Maintenance notes
Page – 48
Service Information
Page – 49