Installation, Operation & Maintenance Merlin CO2 TFT
Rev 1 05-21
8
Operation
Initial Power-Up & Indicators
On connecting power, the CO2-TFT monitor enters a stabilisation phase for approximately 60 seconds – during this
period, your device not yet ready for operation.
a.
CARBON DIOXIDE READING
Current CO
2
gas level in parts per million (ppm).
b.
0-10V ANALOGUE OUTPUT LEVEL
0-10V analogue outputs one and two.
c.
FLAME ICON
Appears only when the CO2-TFT receives a signal
from a gas valve and gas supply is open/on and set
to Natural or Mechanical Ventilation Type mode.
d.
BOOST ON
Message appears when BOOST is activated - press and hold the touch button (f) for three (3) seconds. The
analogue outputs will run at optimum voltage (10V) for a pre-set number of minutes. Boost can only be activated
if either analogue outputs is set to CO2
or DUAL mode only.
e.
MUTE
Message appears when the touch button (f) is pressed. The audible alarm buzzer must be set to on or every 10
minutes and can only occur when gas is in use or KITCH. Ventilation mode is selected and when CO
2
levels rise
above 2800ppm.
f.
VENTILATION MODE
Displayed under normal operation. K (Kitchen) / M (Mechanical) / N (Natural). The mode determines the
configuration and alarm levels.
g.
TOUCH BUTTON
To activate Boost or Mute feature and to view the screen for 10 seconds during screen saver mode.
h.
TEMPERATURE READING
i.
GAS IN USE MESSAGE
Appears only when the CO2-TFT receives a signal from a gas valve and gas supply is open/on.
When the gas valve is closed, this message is not displayed.
Appears with Flame Icon.
j.
BLANK – see K.
(Natural or Mechanical mode), this is left blank when the current CO
2
reading is below 550ppm.
In kitchen ventilation mode – this is constantly left blank.
k.
AVERAGE CO
2
The monitor will display the average CO
2
reading over periods of 8 hours and appear only when current CO
2
levels reach or exceed 600ppm.
Natural or Mechanical ventilation type modes only.
