Caleffi solar iSolar WMZ Manual - Halaman 9

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Function

Indication and adjustment channels

Display channels

• FL (flow temperature in °C / °F)

• RE (return temperature in °C / °F)

• heat quantity

(in Wh / MBTU or kWh / MMBTU respectively)

• volumetric flow rate (in l/min or gpm)

• power (in kW)

Safety prompt:

Save?

6.1 Heat quantity

6.2 Flow and return temperatures

During the calculation of the transferred heat quantity, the

calorimeter iSolar WMZ takes into account that the specific

heat capacity c and the density r depend on the temperature

and the mixing proportion (access to limited values). Using

these parameters, the measurement of the flow and return

temperatures with two precision temperature sensors, and

the evaluation of the impulses of a volumetric flowmeter, the

iSolar WMZ calculates the transferred quantity.

This device can be used in systems which use water or wa-

ter-propylene glycol mixtures as the heat transfer fluid. The

proportion (in vol%) used in a system and the specification

of the selected flowmeter (in liters per impulse) are adjusted

locally after the installation.

adjustment channels

• antifreeze type

• antifreeze

• flow measurement (V40 or VTP)

• volume per impulse

• subaddress

• bus mode

• bus master

• sensor offset

• language

• temperature unit

• flow rate unit

• energy unit

note:

After a change in the adjustment channel has been made,

a safety prompt appears. The adjustment is saved after the

Yes

question has been confirmed with "yes".

The determined heat quantity is indicated. If the heat quantity

15 kWh

is smaller than 1 MWh, the quantity is indicated with the

Heat

unit Wh (MBTU). If the quantity is larger, it is indicated using

the unit kWh (MMBTU).

85,6 °C

45,7 °C

note:

When the indication has reached 999,999 kWh (3412.138

MMBTU), it will start again at 0.

FL = indicates the current flow temperature

15 kWh

Heat

RE = indicates the current return temperature

85,6 °C

45,7 °C

(example: 85.6 °C)

(example: 45.7 °C)

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