Cosmo Multi 2 User Manual

94
collector blocked
A collector is considered to be blocked, if either the
sensor is defective or the emergency shutdown tem-
perature is reached.
Pump speed is controlled according to collector tem-
perature rather than (usual) temperature difference.
The aim is to maintain constant collector temperature,
adjustable with parameter “Tcolset“.
Target temperature:
Solar/Options/Target tem.
selection „Yes“, „No“
factory setting: „No“
if you select „Yes“.
Solar/adj. values/tcolset
adjustment range: 20 ... 110 °C
factory setting: 65 °C
Parallel relay:
Solar/Options/Par. Relay
selection: „Yes“, „No“
factory setting: „No“
If the solar circuit pump is switched on, this relay is
activated in parallel.
In 2-collector systems which are working with 2 pumps,
the parallel relay is activated if one of the 2 pumps is
activated.
CS-Bypass:
Solar/Options/CS-Bypass
selection: „Yes“, „No“
factory: setting „No“
if you select „Yes“:
Solar/adj. values/CS-Byp.
adjustment range: 100 ... 500 W/m
2
factory setting: 200 W/m
2
If the irradiation exceeds the adjusted value CS-bypass,
the collector circuit is operated. It is switched off when
the irradiation has fallen below the value „CS-bypass“
for at least 2 minutes.
The collector circuit is operated with minimum pump
speed.
2-collector systems:
If a loading of the store is carried out in these systems,
the function is switched off.
Collector emergency shutdown:
Solar/adj. values/Tcolsec
adjustment range: 110 ... 200 °C
factory setting: 120 °C
hysteresis: 10 K
At high collector temperatures (depending on system
pressure or antifreeze concentration etc.) the systems
stagnates. This means that solar loading is not possible.
If the adjusted temperature threshold „Tcolsec“ is ex-
ceeded, the corresponding collector will no longer be
used for loading.
Afterheating suppression:
Solar/Options/ah suppress.
selection: „Yes“, „No“
factory setting: „No“
if you select „Yes“:
Solar/Expert/ah suppress.
adjustment range: St 1 ... St 4
factory setting: St 1
This function is active if a previously selected solar
store (parameter designation: “AH suppress.“ in the
menu solar expert) is being loaded.
Solar loading means that store loading is only carried
out for energy supply and not for cooling purposes etc.
4. Functions and options

Cosmo Multi 2 Specifications

General

Brand	Cosmo
Model	Multi 2
Category	Controller
Language	English