Roth BW/H Komfort, Installation Manual

Page: 54 / 172

BW/H Komfort
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Cooling function:
The cooling function can be used in 1-store systems. If the
store is at maximum limitation, the surplus energy in the
collector can be derived. The pump output (provided that
it is activated) is controlled with relative maximum pump
speed.
Operation mode (switching conditions):
If the store is at maximum limitation and the switch-on
temperature difference DeltaTon between collector and
store is reached, the solar circuit (primary) and the cooling
relay are operated.
If the switch-off temperature difference
∆
Toff is underrun
in this period, the solar circuit and the cooling relay are
switched-off.
2-collector systems: Only the collector circuit, which complies with the above
described switch-on criteria, is operated in these systems.
Collector security switch-off:
In case of high collector temperatures (dependant on e.g.
system pressure or content of frost protection), the heat
transport medium evaporates. That means, that a solar
charge is no longer possible.
If the adjusted temperature threshold Tcolnot is exceeded,
the charge at each collector is suspended.
Note: if the option „collector cooling“ is activated, the secu-
rity switch-off temperature can not be adjusted lower than
the maximum collector temperature (Tcolmax).
Collector blocked: A collector is considered to be blocked if either the sen-
sor is defect or the securtiy switch-off temperature is
reached.
Solar collector blocked:
A collector for solar operation is considered to be blocked
if the adjusted minimum temperature is not exceeded or
the condition „collector blocked“ is achieved.
Store charging:
If the adjusted switch-on difference
∆
Ton between collector
and store is exceeded, the store is charged.
If this difference falls under the adjusted switch-off diffe-
rence
∆
Toff, the store is again charged.
The store charge is also suspended if the relevant store or
collector is blocked (collector solar blocked) or if the store
is at maximum limitation.
Tcolnot:
Adjustment range 110 ... 200 °C
Factory setting 130 °C
Hysteresis 10 K
∆
Ton:
Adjustment range 1,5 ... 20,0 K
Factory setting 5,0 K
∆
Toff:
Adjustment range 1,0 ... 19,5 K
Factory setting 3,0 K
Tcolmin:
Adjustment range 10 ... 90 °C
Factory setting 10 °C
Hyteresis 2 K
B