Honeywell NXL Series Applications Manual page 63

Honeywell
2= Autochange with frequency converter and auxiliary pumps
The drive controlled by the frequency converter is included in the automatics and a contactor is
needed for each drive to connect it to either the mains or the frequency converter
auxiliary
connection
Drive 1
Figure 1- 36. Autochange with all drives
3= Autochange and interlocks (only auxiliary pumps)
The drive controlled by the frequency converter remains the same. Therefore, mains contactor is
needed for one auxiliary drive only. Interlocks for autochange outputs 1, 2, 3 (or DIE1,2,3) can be
selected with par.
4= Autochange and interlocks (Freq. conv. & aux pumps)
The drive controlled by the frequency converter is included in the automatics and a contactor is
needed for each drive to connect it to either the mains or the frequency converter. DIN 1 is
automatically interlock for Autochange output 1. Interlocks for Autochange output 1, 2, 3 (or DIE1,2,3)
can be selected with par.
2.10.5 Autochange interval
After the expiry of the time defined with this parameter, the autochange function takes place if
the capacity used lies below the level defined with parameters 2.10.7 (Autochange frequency
limit) and 2.10.6 (Maximum number of auxiliary drives). Should the capacity exceed the value
of P2.10.7, the autochange will not take place before the capacity goes below this limit.
•
The time count is activated only if the Start/Stop request is active.
•
The time count is reset after the autochange has taken place or on removal of Start request
Description of parameters
auxiliary
connection
M Drive 2
2.1.15.17 2.1.15.18
and
2.1.15.17
NXL
NX12k97.fh8
M
.
2.1.15.18
and .
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