7.5 kVA - 15 kVA UPS
Parallel for Redundancy System
User’s and Installation Manual
1012833
Revision 4
21
Environment Alarm Input
The environment alarm input is used for connecting the UPS to your building alarms, such
as overtemperature or smoke detector alarms.
The environment alarm input contact wires are connected on terminal X222 behind Relay
Interface connector X102 (see figure 5b).
NOTE!
The programmable auxiliary inputs (Generator ON, External Bypass Switch, Remote
Output On/Off, Environment Alarm) must not be galvanically connected to any mains
connected circuits. Reinforced insulation to the mains is required for equipments and
cables connected to these connections.
8. Users guide to operations
This chapter contains the necessary information on how to use the UPS units. The starting
up and shutting down procedures described here are only used on a few occasions for
example when preparing for a long term mains failure or changing the batteries. In normal
operation the UPS units run automatically.
Initial start up is always performed by service personnel of the manufacturer or by a
representative of an agent authorised by the manufacturer. Otherwise the safety of personnel
during installation or use, or that the units will function properly, can not be guaranteed.
During commissioning the manufacturers representative will train the users to operate the
UPS system.
NOTE!
The maintenance switches in the parallel module are used only by service personnel from
the manufacturer or from an agent authorised by the manufacturer.
8.1 Starting up the Parallel for redundancy system
Make sure that UPS installations have been carried out correctly and ground connections
of both UPS units and parallel module have been connected. Figure 9 shows the location
of the switches and breakers of the UPS units and the parallel module.
In the parallel for redundancy system start up of the UPS units have to be performed one
after another. It does not matter which UPS is started first.
Starting up the UPS
Before starting up the UPSes ckeck that the maintenance bypass switch of the parallel
module is in the UPS position *)
Remove the front panels of UPS. Fig. 5a.
Turn the circuit breakers F1 and F2 to ON-position
Start the UPS by turning the main switch S1 to I position
Reinstall the front panels
The UPS will now check its internal functions, synchronise inverters and start supplying
power to the output. The UPS starts after 3-4 minutes. During this start up the UPS ON
LED is blinking.
When the UPS ON LED is lit the other UPS can be started up in the same way.
*) If the UPSes are necessary to start up the parallel system with the maintenance bypass switch in BYPASS
position, turn the parallel system to the normal operation mode according to the section 8.4 of this manual.
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