Trane TR200 Series Programming Manual page 235

Parameter Description
23-66 Reset Continuous Bin Data
Option:
[0] * Do not reset
[1] Do reset
23-67 Reset Timed Bin Data
Option:
[0] * Do not reset
[1] Do reset
23-8* Payback Counter
The frequency converter includes a feature which can give a rough calculation on payback in cases where the
frequency converter has been installed in an existing plant to ensure energy saving by changing from fixed to
variable speed control. Reference for the savings is a set value to represent the average power yielded before
the upgrade with variable speed control.
The difference between the Reference Power at fixed speed and the Actual Power yielded with speed control
represent the actual saving.
As value for the fixed speed case, the rated motor size (kW) is multiplied with a factor (set in %) representing
the power produced at fixed speed. The difference between this reference power and the actual power is accu-
mulated and stored. The difference in energy can be read in par.23-83
The accumulated value for the difference in power consumption is multiplied with the energy cost in local cur-
rency and the investment is subtracted. This calculation for Cost Savings can also be read in par.23-84
Savings.
{
t
∑
(
Cost Savings Rated Motor Power
=
t
=0
Actual Power Consumption
−
Break even (payback) occurs when the value read in the parameter turns from negative to positive.
234
Function:
Do reset
Select [1] to reset all values in par.23-61
After pressing OK the setting of the parameter value will automatically
Do not reset
change to
Function:
Do reset
Select [1] to reset all counters in par.23-62
After pressing OK the setting of the parameter value will automatically
Do not reset
change to
Power Reference Factor
∗
}
Energy Cost Investment Cost
× −
[0].
[0].
Energy Savings.
)
TR200 Programming Guide
Continuous Bin Data.
Timed Bin Data.
Cost