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61
Installation
Indications,
functions and options
Messages
Commissioning
Operation and function
This function is used for improving the switch-on behaviour in systems with
non-ideal sensor positions (e. g. with some tube collectors). This function operates
within an adjusted time frame. It activates the collector circuit pump for an adjust-
able runtime between adjustable standstill intervals in order to compensate for the
delayed temperature measurement.
If the runtime is set to more than 10 s, the pump will be run at 100 % for the first
10 s of the runtime. For the remaining runtime, the pump will be run at the adjusted
minimum speed. If the collector sensor is defective or the collector is blocked, this
function is suppressed or switched off.
TCEN
Tube collector function ending time
Adjustment range: 00:00 … 23:45
Factory setting: 19:00
TCRU
Tube collector function runtime
Adjustment range: 5 … 500 s
Factory setting: 30 s
TCIN
Tube collector function standstill interval
Adjustment range: 1 … 60 min
Factory setting: 30 min
In system 7, both collectors are operated independently from each other by means
of this function. If the store is being loaded by one collector, the other one is nev-
ertheless operated.
Note
If the drainback option ODB is activated, TRCU will not be available. In
this case, the runtime will be determined by the parameters tFLL and
tSTB.
Grundfos Direct Sensor™ registration
GFD
Grundfos Direct Sensor™ registration
Selection: OFF, 12, 40, 40F
Factory setting: OFF
Registration of a digital flow rate sensor which can be used for heat quantity mea-
surement.
OFF : no Grundfos Direct Sensor™
12 : VFD 1 - 12 (water / propylene glycol mixture)
40 : VFD 2-40
40F : VFD 2-40 Fast (water only)
Heat quantity measurement
OHQM
Heat quantity measurement option
Adjustment range: OFF / ON
Factory setting: OFF
If OHQM is activated, the heat quantity gained can be calculated and displayed.
The heat quantity measurement can be carried out in 3 different ways (see below):
with a fixed flow rate value, with a VFD Grundfos Direct Sensor™ or with a PWM
feedback signal.