Viessmann SCU345 Manual page 59

OHQM / FMAX
Flow rate in l/min
Adjustment range: 0.5 ... 100.0
in steps of 0.1
Factory setting: 6.0
OHQM / MEDT
Heat transfer fl uid
Adjustment range: 0 ... 3
Factory setting: 3
Energy metering with fi xed fl ow rate value
The energy metering calculation (estimation) uses the
difference between the fl ow and return temperatures
and the entered fl ow rate (at 100 % pump speed).
Î Adjust 1 in the channel FTYPE
Î Read the fl ow rate (l/min) and adjust it in the
channel FMAX.
Î Adjust the antifreeze type and concentration of
the heat transfer fl uid in the channels MEDT and
MED%.
Note
FMAX cannot be selected in systems with
2 solar pumps (ARR 3, 4, 6, 8, 9).
Note
The energy metering calculation (estima-
tion) uses the difference between the fl ow
and return temperatures and a fl ow rate val-
ue calculated from the entered fl ow rate (at
100 % pump speed) and the current pump
speed.
OHQM / MED%
Antifreeze concentration in vol. %
(MED% is "hidden" when MEDT 0 or 3 is used)
Adjustment range: 20 ... 70 %
in steps of 1 %
Factory setting: 45 %
Antifreeze type:
0 : water
1 : propylene glycol
2 : ethylene glycol
3 : Tyfocor LS / G-LS
®
OHQM / FIMP
Pulse rate
Adjustment range: 0.5 ... 99.0
in steps of 0.1
Factory setting: 1.0
Energy metering with V40 fl owmeter
The energy metering calculation uses the difference
between the fl ow and return temperatures and the
volume fl ow transmitted by the fl owmeter.
Î Adjust 2 in the channel FTYPE
Î In the channel FIMP, adjust the impulse rate cor-
responding to the V40 fl owmeter used.
Î Adjust the antifreeze type and concentration of
the heat transfer fl uid in the channels MEDT and
MED%.
HQM sensors
OHQM / SFHQM
Flow sensor
Adjustment range: 1, 3, 5
Factory setting: 1
OHQM / SRHQM
Return sensor
Adjustment range: 2, 3, 5
Factory setting: 2
For this function, free sensors at an appropriate posi-
tion can be selected as fl ow and return sensors.
Î In the channel SFHQM, select the fl ow sensor.
Î In the channel SRHQM, select the return sensor.
59