Maintenance; Guarantee - Weinmann & Schanz DRAIN-UNIT Manual De Instrucciones

3. Once the operation has finished cover the filling plug (3) with the flat seal and the cup supplied
and close the filling / draining tap (2).
4. Run the system for at least 15 minutes to dislodge any possible air bubbles. Stop the pump again
and check whether the fluid level has been maintained; if not, top it up.
5. After a period of time, verify that the flow is suitable for the installation and, if not, change the values
of PWMmin and/or PWMmax as necessary.
• Adjust controller parameters
For Drain Units that do not include an solar controller, the following control parameters should be
set:
- Activation temperature difference between collector and storages tank: 15ºC.
- Maximum permissible temperature in the collector field: 130ºC.
- Pump speed lower limit (PWMmin): 60% or higher.
- Set filling time (with PWM at 100%): minimum 5 minutes.
• Pump operation
LED
Green switched on Pump in operation
Pump ready for service but
Flashing red / green
does no work
Flashing
Pump out of service
Red
There is no power supply
8.

MAINTENANCE

1. Open the cap of the air separator during maintenance operations when the system is not running and
re-plug it.
2. Ensure that there is flow when filling the collectors.
3. Check the liquid level in the system and ensure that there are no leaks that would cause the fluid level
to go down and not have enough volume to fill the collector field.
9.

GUARANTEE

The Drain-Unit is guaranteed against material defects for 3 years from the date of manufacture marked
on it. This warranty does not apply if the unit has been manipulated, altered or damaged by use or
installation, and not installed according to the instructions provided by the manufacturer.
Significance Operating Status
Pump operates according to
its setting
The pump restarts
automatically when the
problem is resolved
Pump stopped (blocked)
The electrical system is not
receiving voltage
Cause
Normal operation
Low voltage (<160 V) or
excess voltage (>253 V)
Overheating of the module:
the temperature of the motor
is too high
Pump does not start again
automatically
The pump is not connected
to the power supply
The LED is defective
The electrical system is
faulty
14
Solution
Check the power supply
Check ambient temperature
and that of the fluid
Replace the pump
Check the cable connection
Check if the pump operates
Replace the pump