Danfoss vlt aqua Programming Guide

0
hours
*
[0 – 2147483647
hours]
Readout of the value for Pump ON Time. The Cascade Controller
has separate counters for the pumps and for the relays that
control the pumps. Pump ON Time monitors the “operating
hours” of each pump. The value of each Pump ON Time counter
can be reset to 0 by writing in the parameter, e.g. if the pump
is replaced in case of service.
25-85 Relay ON Time
Array [2]
0
hours
*
[0 – 2147483647
hours]
Readout of the value for Relay ON time. The Cascade Controller
has separate counters for the pumps and for the relays that
control the pumps. Pump cycling is always done based on the
relay counters, otherwise it would always use the new pump if
a pump is replaced and its value in par. 25-85, Pump ON Time
counter is reset. In order to use par. 25-04, Pump Cycling, the
Cascade Controller is monitoring the Relay ON time.
25-86 Reset Relay Counters
Option: Function:
[0]
*
Do not reset
[1] Do reset Resets all elements in
Relay ON Time counters, par. 25-85.
2.21.7. 25-9* Service
Parameters used in case of service on one or more of the pumps controlled.
25-90 Pump Interlock
Array [2]
[0] *
Off
[1] On In this parameter, it is possible to disable one or more of the
fixed lead pumps. For example, the pump will not be selected
for staging on even if it is the next pump in the operation se-
quence. It is not possible to disable the lead pump with the
Pump Interlock command.
The digital input interlocks are selected as
Pump 1-3 Interlock
[130 – 132] in Digital Inputs , par. 5-1*.
Off [0]: The pump is active for staging/destaging.
On [1]: The Pump Interlock command is given. If a pump is
running it is immediately destaged. If the pump is not running
it is not allowed to stage on.
VLT
®
AQUA Drive Programming Guide 2. Parameter Description
MG.20.O2.02 - VLT
®
is a registered Danfoss trademark 243
2

Danfoss vlt aqua Specifications

General

Supply Voltage	200-240V, 380-500V, 525-600V
Enclosure	IP20
Features	Energy optimization
Approvals	CE, UL, cUL
Input Voltage Range	200-240V, 380-500V, 525-600V
Output Voltage Range	0 to supply voltage
Protection Features	Overvoltage, Undervoltage, Overcurrent, Short circuit, Ground fault
Communication Interfaces	PROFIBUS
Cooling Method	Air-cooled