First EMV 110 502 Series, Manual

Page: 66 / 104

page
66
4. Setting the working regimes - C.n.b and C.d.t.
On the display appears signs “C.n.b.” or “C.d.t.”
Regime: C.n.b.
Normal state of thermostat. Limitations of temperatures valid
for collector circuit and after-heating circuit. This regime must
be used in systems with heat pump.
Regime: C.d.t.
Thermostat heats domestic water from collector circuit irrespective of setting of max.
temperature in boiler (no limitation of max. temperature of the boiler for collector circuit).
Choose that regime in case, that you want to use max. energy of collector and the crossing
temperature of the boiler will not damage no one of connected consumer of hot water.
With keys T2 in T3 set required regime.
When you set the required regime, press key T1 and hold it!
On the display appears P.r. and hold down the key (approximately 3s), until the sign
P.r. disappears and on display appears the temperature T1 (tem pera ture of
collector circuit). Now release the key.
If you release the key too soon, entered values are not effective.
We mentioned before, that we have the possibility to disconnect the collector circuit and
after-heating circuit. For such step we decide in following cases:
Disconnection of Collector Circuit Operation
It is used in cases of mechanical faults of collector system, which requires draining of liquid
(water) from collector system, but after-heating circuit should operate in au to matic mode.
Disconnection is useful also in systems where water is discharged from collectors during
winter, which prevents “dry operation” of the pump.
The procedure of disconnection is described in point 2 - set the parameter C to value 0.
When you want again connection of the collector circuit, set the parameter C to value
different from 0 (factory set to 5K).
Disconnection of After-heating Circuit Operation
It is used in cases of mechanical faults of after-heating system which requires draining of
liquid (water) from the system but collector circuit should operate in automatic mode. It
disconnects after-heating pump operation as well as burner (or electric heating element)
switching on.
The procedure of disconnection is described in point 3 - set the parameter P to value 0.
When you want again connection of the after-heating circuit, set the parameter P to value
different from 0 (factory set to 8K).