oventrop Regtronic RH HT, Installation And Operating Instructions For The Specialised Installer, Page: 42 / 56

42
Installation
Commissioning
Settings
Data comm
unication
Tr
oubleshooting
en
8 HQM
In the HQM menu, up to 5 internal heat quantity measurements can be activated
and adjusted.
By selecting the menu item new HQM..., a new heat quantity measurement can
be activated.
A menu opens in which all adjustments required for the heat quantity measure-
ment can be made.
If the Flow rate sensor option is activated, an impulse input or, if available, a
Grundfos Direct Sensor™ can be selected. Grundfos Direct Sensors™ are only
available if they have been previously registered in the In-/Outputs menu. The
impulse rate must be adjusted in that menu as well.
If the Flow rate sensor option is deactivated, the controller calculates the heat
quantity by means of a fixed flow rate value.This is called heat quantity balancing.
For this purpose, the flow rate must be read from the flowmeter at 100 % pump
speed and adjusted in the adjustment channel Flow rate. In addition to that, a
Relay must be allocated. Heat quantity balancing is in effect whenever the allo-
cated relay is active.
In the adjustment channel Fluid type the heat transfer fluid must be selected.
If either propylene glycol or ethylene glycol is selected, the adjustment channel
Ratio is indicated in which the antifreeze ratio of the heat transfer fluid can be
adjusted.
When the Alternative unit is activated, the controller will convert the heat
quantity into the quantity of fossil fuels (coal, oil or gas) saved, or the CO
2
emis-
sion saved respectively. The alternative Unit can be selected. A Conversion fac-
tor must be adjusted for the calculation. The conversion factor depends on the
arrangement in use and has to be determined individually.
Heat quantity measurements already activated will appear in the HQM menu
above the menu item new HQM … in numerical order.
If an activated heat quantity measurement is selected, the above mentioned menu
with all adjustment values will re-open.
To deactivate a heat quantity measurement, select the menu item Delete func-
tion at the bottom of the menu.
The heat quantity measurement deleted will disappear from the list and become
available for selection in the new HQM menu again. The numeration of the other
activated heat quantity measurements will not change.