Sunhome Tech SR1568 User Manual

Operation manual of solar controller SR1568
Page 84 of 87
Tanks cool down at night.
Collector circuit pump runs during the night?
No
Yes
Check controller
Check the non-return valves in
the flow and the return pipe for
functional efficiency.
Collector temperature at night is higher than
the outdoor temperature.
No
Yes
Sufficient tank insulation?
Insulation closes enough to the tank?
Increase insulation.
Yes
No
Replace insulation or increase it
Yes
No
Are the tank connections insulated?
Insulate the connections.
Yes
No
Warm water outflow upwards?
Change connection and let the
water flow side wards or
through a siphon downwards);
less tank losses
now?it.one.
Yes
No
Circulation pump and blocking valve should
be switched off for 1 night; less tank losses?
Check whether the pumps of the
after-heating circuit run at night; check
whether the non-return valve is
effective; problem solved?
No
Does the DHW circulation run for a very long time?
Use the circulation pump with timer and
switch-off thermostat energy-efficient
circulation
No
Yes
Yes
No
Ok
Yes
The gravitation circulation in the
circulation line is too strong; insert
A stronger valve in the non-return
Valve or an electrical 2-port valve
behind
The circulation pump; the 2-port
Valve is open when the pump is
activated, otherwise it is closed; connect
pump and 2-port valve electrically in
parallel; activate the circulation again.
Deactivate pump speed control!
Further pumps which are connected to
the solar tank must also be checked.
Yes
No
Check the non-return valve in warm water
circulation - o.k.
Clean or replace it.
No

Sunhome Tech SR1568 Specifications

General

Brand	Sunhome Tech
Model	SR1568
Category	Controller
Language	English