Part No. 4801-5309 rev 1-15
Evolution Back-Up
5 of 17
4.2 Emergency
Operation
In this mode of operation, the system still maintains the temperature as it does in Normal Operation. In
addition, it will begin running the first cooling stage (Cool 1) on a 5 minute timer. The timer percentage is
determined by the setting in P3 (Emergency Timer Percentage). This mode of operation is entered if
communication is lost between the master controller and the Back-Up System. In this case, the Back-Up
System assumes that the master controller is lost and tries to maintain the minimum ventilation until
someone recognizes the problem. Emergency Operation is indicated by a “LnE” flashing in the display of
the Back-Up System. The alarm relay on the Back-Up System is also engaged in this mode operation.
4.3 Override
Operation
In this mode of operation, the system still maintains the temperature as it does in Normal Operation. In
addition, it receives commands from the master controller to turn on certain stages of heating or cooling.
There are many different circumstances that could cause this to happen, in this manual, we will list one of
the most common. For example, if communication were lost inside the EV-3000, the master controller
would be unable to turn the appropriate stages on in the usual way. Therefore, the master controller would
communicate to the Back-Up System and indicate which stages that it is trying to turn on. At this point,
the Back-Up System would obey the command and turn the appropriate stages on. For this mode of
operation to work to its fullest potential, care must be taken to insure that the stage jumpers on the relay
strips match the stage setting in the master controller (Refer to Section 12). Override Operation is
indicated by a “LnO” flashing in the display of the Back-Up System. The alarm relay is also engaged in
this mode of operation.
4.4
Fail-Safe Relay Operation
There are two types of Relay strips used in the Evolution 3000. The Normally Open (NO) strip requires a
signal from the controller board in order to energize a stage of ventilation. Should power be removed from
the EV-3000 the Normally Open Relay strips would not be able to energize a ventilator. On the other hand
the Fail-Safe relay strip would close each of the relays in the strip resulting in energizing the ventilators in
case of a controller power failure. Each of the relay strips contains four relays for controlling four stages.
In the EV-3000 there are a total of four relay strips, three will be N.O. and one will be a Fail-Safe. The
operator must insure that the Fail Safe relay strip is connected only to stages that should be turned on in
case of a controller failure. See the EV-3000 Owners manual Part No. 4801-5307 for a physical
description of the relay strips. It is not recommended to place heating equipment on Fail-Safe stages.
5. Inlet Operation During Back-up
The EV-Back-Up contains a relay that can operate the Vents
and/or Tunnel during Back-up operation of the EV-3000.
The Inlets will automatically open during back-up.
Cool 1 controls Vents Inlet. Cool 3 controls Tunnel Inlets.
When Cool 1 and Cool 3 are not set, Back-up reverts to Normal
operation.
6. Setting EV-Back-Up Stage Jumpers
Pictured at the right is a Stage Relay Board consisting of four
stage relays and the associated stage jumper for each stage relay.
The stage jumpers are labeled COOL 1, COOL 2, COOL 3 and
HEAT. Location of the jumper places the stage in one of these
four modes, or if the jumper is
not
inserted, the stage is
not
placed on Back-Up. The jumpers should be placed based on the
operation of stage equipment and should be the same as assigned
in the EV-3000 Controller. Jumpers are placed according the
following table:
Stage Relay
Stage Harness
connector
cables to
Terminal Block
COOL 3
COOL 2
COOL 1
HEAT
Stage
Jumpers
STAGE RELAY BOARD
