silkscreen next to the terminal blocks as well as in the diagram on page 54. The relay state is
labeled for the physical state of the relay when the control panel is not powered. In the default
configuration, all relays will operate independently of one another. To use multiple-speed fans,
you will need to assign different relay levels in the settings and invert the wiring connections to
avoid damaging ventilation equipment.
Do not exceed the specified voltage and power limits of the relays (see page 7). Most
installations require motor starters or larger relays to provide the necessary power
requirements for the ventilation components.
For more information concerning ventilation system operation, read page 17 of this manual.
Step 5 – External Alarms
Determine if the installation requires an external alarm. If so, provide the proper wiring and
connect the wires to the required voltage source. Any relay may be used to trigger an external
alarm. To synchronize the internal control panel alarm with external alarms, make sure the
setpoints and delay times are the same in both the
Zone Settings
Screen
and
Relay Settings
Screen
.
Refer to page 18 for more information concerning the alarm feature.
Step 6 – Applying Power
Once you are sure that the wiring connections are correct, apply power to the control panel
circuit. When power is first applied to the transmitters, they will begin a 150 second warm-up
period. During this time, the control panel will display “--” in place of gas concentration values
on the
Zone Screen
and
Relay Screen
. Once the warm-up has finished, the gas concentration
values will appear.
See page 18 for more information concerning the initial startup.
Step 7 – Testing the System
The manual overrides on this control panel can be used to open and close the relays to verify
that ventilation and warning equipment is connected properly. This feature can be accessed
from the individual
Relay Settings
screens.
Page 19 contains a more complete procedure for testing the system.
At this point, the control panel and transmitters are now ready to monitor for the presence of
the target gas(es) and control the ventilation system to efficiently remove the gas from the
protected area.
IOM03
Rev 1.1 – May 18, 2021
12
