Name: Velux CLI U12 SD0(W/L/F/P) 118 El B/U
Brand: Velux
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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

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

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

Table of Contents

Questions and Answers:

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