Spirax Sarco RIM20, Инструкция по установке и обслуживанию, Страница: 61 / 132

IM-P198-05 MI Issue 2 61
4.10 Energy menu - For EM energy meters only
Configuration:
There are several possibilities regarding the measurement of water or steam energy given
the location of the meter and the use of a second RTD. The table below summarizes the
possibilities:
Fluid Meter location Second RTD Measurement
Water "Sent" Flow Line "Return Flow Line Change in Energy
Water "Return" Flow Line "Sent" Flow Line Change in Energy
Water "Sent" Flow Line None Outgoing Energy
Steam "Sent" Flow Line "Return" Flow Line (condensate) Change in Energy
Steam "Sent" Flow Line None Outgoing Energy
As above, you must properly configure the meter in the Energy Menu.
1. Loc in Sent Flow? Select Yes or No based on where the meter is located. Refer to the
above table
2. Heating System? Select Yes for a hot water system used for heating. Select No for a chilled
water system used for cooling. Always select Yes for a steam system.
3. % Returned. Select a number between 0% and 100%. Estimate the amount of water that
returns.
It is usually 100%, or can be less than 100% if historical data shows the amount of makeup
water used. If a second RTD is not used, set to 0%. When 0% is selected, the energy
calculation represents the outgoing energy only (no return energy is subtracted).
NOTE: the meter ships from the factory assuming 0% return and has a 1000 ohm
resistor installed in the RTD #2 wiring location. This needs to be removed if the meter
is to be used in a manner other than with 0% return and with the customer supplied
RTD in its place.