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140
(08-010)
TKOmax
TKOprotection off
TKOprotection
130
120
110
100
90
80
50
60
70
(08-011)
(08-010)
– 10K
TKO
Txprotection
TKOmax off
PS1 on
Overheating
protection on
TxU
(08-011)
– 10K
(08-060)
12.4.7. Overheating protection (08-005)
If overheating protection is activated, the collector pump operates in normal mode.
(PS1 with collector temperature TKO less than collector maximum temperature TKOmax (08-011) and temperature
in the consumer bottom TxU less than Txprot protection temperature)
If the collector temperature TKO rises above the collector maximum temperature TKOmax (08-011),
the overheating protection is activated and attempts to keep the collector temperature TKO within the collector
maximum temperature TKOmax by speed control of the collector pump.
If the collector temperature reaches the protection temperature TKOprot (08-010) or the consumer protection
temperature Txprot (08-060) is exceeded at storage tank sensor bottom TxU, the solar pump PS1 switches off and
charging is blocked.
As soon as the limit temperatures have been undershot again, the overheating protection is continued.
When the collector temperature TKO drops below the collector maximum temperature TKOmax (08-011) minus 10K,
overheating protection mode is terminated.