48
en-US/C
A
COL (1) / OCFR / CFR F
Antifreeze temperature off
Adjustment range:
-39.0 ... +8.0 °C [-39.0 ... +48.0 °F]
in steps of 0.5 °C [1.0 °F]
Factory setting: +5.0 °C [+42.0 °F]
COL (1) / OCFR / FRPST
Tank sensor selection
(in 2- and 3-tank systems only)
Selection: 1, 2, 3
Factory setting: 1
The antifreeze function activates the loading circuit
between the collector and the tank when the collec-
tor temperature falls below the adjusted temperature
CFR O. This will protect the fl uid against freezing or
coagulating. If CFR F is exceeded, the solar pump will
be switched off again. The antifreeze function will be
suppressed if the tank temperature of the selected
tank falls below 5 °C [42 °F]. In 2-tank systems, the
function will in this case be switched to the 2nd
tank. In a system with vertical tank loading it will be
switched to the upper tank zone. If the temperature
of the 2nd or 3rd tank (or of the upper tank zone
respectively) also falls below 5 °C [42 °F], the system
will be switched off.
Note
Since this function uses the limited heat
quantity of the tank, the antifreeze function
should be used in regions with few days of
temperatures around the freezing point.
Note
This function can only become active if the
tank temperature is higher than the collec-
tor temperature.
Priority logic
LLOGI/LogiC
Priority logic
Selection:
Prio, SuLA, StUF, PAr, bLO
Factory setting: PRIO
LLOGI / PRIO1 (2, 3)
Priority
Adjustment range: 1, 2, 3
Factory setting: 1
LLOGI / tLB
Loading break time
Adjustment range: 1 ... 30 min
in steps of 1 min
Factory setting: 2 min
LLOGI / tRUN
Oscillating loading runtime
Adjustment range: 1 ... 30 min
in steps of 1 min
Factory setting: 15 min
Priority logic can be used in 2-tank systems, 3-tank
systems or systems with vertical tank loading and de-
termines how the heat is divided between the tanks.
Different types of priority logic are adjustable:
1. Tank sequence control (PRIO)
2. Successive loading (SuLA)
3. Progressive loading (StUF)
4. Parallel loading (PAr)
5. Loading in blocks (bLO)
1. In tank sequence control (PRIO), a priority (1 =
highest priority) is assigned to the tank (PRIO1 = tank
1, PRIO2 = tank 2; the priority of the 3rd tank is de-
termined by the priority of the fi rst 2 tanks).
Summary of Contents for SCU345
Page 71: ...en US CA 71 Notes ...
