Differential Controller - Promatic WDC10B Manual

DIFFERENTIAL CONTROLLER

The WDC20 controller has a built-in autonomous differential controller. The latter is activated
with parameter S1.4. Differential controller function is possible in hydraulic schemes, where
R6, T1 and T8 are free. R6 output is implemented with triac and enables the control of by-
pass pump rotation rate.
EXAMPLE OF DIFFERENTIAL CONTROLLER USE FOR SOLAR COLLECTORS (S1.4=4):
EXAMPLE OF DIFFERENTIAL CONTROLLER USE FOR SOLID FUEL BOILER (S1.4=5):
Differential controller can be activated in schemes 408, 408b, 409, 409b, 411, 413,
416, 416b, 416c, 417, 418, 419, 420, 421, 422, 422b, 422c, 422d, 423e, 423f and
423h.
Schemes 404, 404b, 404c, 404d, 404e, 404f, 405, 406 and 407b already include a
differential regulator for the solar system.
67 Service setting manual