Installation, Operation & Maintenance Manual CO2-TFT
Rev 3 11-20
7
CO2 PRE-ALARM
This relay can send a signal to a Building Management System
(BMS) or Merlin panel when CO
2
reaches pre-alarm level.
FAN ENABLE
The [FAN ENABLE] relay output can be connected to a fan switch
which can energise fans via a signal.
This relay will switch on a fan from the current CO
2
level only, by
current temperature only or by the status of both (whichever is
greatest) as follows:
N/C: >600ppm / > 73.4°F / 23°C
N/O: <550ppm / < 71.6°F / 22°C
These levels cannot be altered.
0-10V ANALOGUE OUT 1 & OUTPUT 2
These connections are used to regulate external fan speed
controllers (supplied separately). Connect direct to fan speed
controllers or via your Merlin panel [0-10V] terminal if available.
Minimum voltage output can be configured in settings menu from 0
to 5 volts.
0-10V output can be driven by the status of current CO
2
level only,
by current temperature only or by the status of both levels
(whichever is greatest).
12-24V POWER
To power the CO2-X with 12-24V power – this should be supplied
to the [12-24V POWER INPUT] connector (+ / -).
This connection can be either AC or DC.
