Evacuated tube solar water heating
- Thread starter lilman
- Start date
Help Support Talk Electrician Forum:
what sort of solar water heating is it?
solar thermal?
solar thermal?
You should get a wiring diagram with the control panel,
Basically you will prob have the following,
Stat at tube on roof, stats at top and bottom of cylinder, pump(possibly 2), and control box,
Not much to them really.
Basically you will prob have the following,
Stat at tube on roof, stats at top and bottom of cylinder, pump(possibly 2), and control box,
Not much to them really.
Agreed. Wiring is fairly straightforward. The control box gets a permanent supply, and it handles the primary pumping, based on the inputs it receives from the stats. Its pretty much "stand-alone", as far as control goes - it just does its own thing, with little regard for DHW & CH requirements.
The primary reason for this is that you can`t "switch the sun off"- if you don`t power the control, the fluid in the collectors will overheat; so the system pumps it around to control the temp. of the fluid at the collectors. The only time this becomes an issue is on "thermal store" type cylinders, which have a max. temp limit; beyond which you have to operate a "shunt" radiator or similar, to remove excess heat from the cylinder - however that wiring is all part of the CH / DHW system, and not directly connected to the solar system.
KME
The primary reason for this is that you can`t "switch the sun off"- if you don`t power the control, the fluid in the collectors will overheat; so the system pumps it around to control the temp. of the fluid at the collectors. The only time this becomes an issue is on "thermal store" type cylinders, which have a max. temp limit; beyond which you have to operate a "shunt" radiator or similar, to remove excess heat from the cylinder - however that wiring is all part of the CH / DHW system, and not directly connected to the solar system.
KME
