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SYMBOLS
used on the display
PRS
Pressure
Ra
CO/CO
2
XAIR
Excess Air
Tf
Flue temperature
Ta
Inlet temperature
∆T
Nett temperature / Differential temperature
EfG
Gross efficiency
EfCG
Gross condensing Efficiency
EfN
Nett efficiency
EfCN
Nett condensing efficiency
- PO -
Pump off
‘O2++%
Calculated oxygen greater than 18% so calculation is disabled
N/F
Temperature input not fitted
CAL
Number of days left before recalibration is due
BAT
Battery level symbol
N/F
Not fitted.
INT
Interval in seconds
ppm
parts per million
p
parts per million
ppm(n)
parts per million normalized
O2ref
reference level in % for normalization calculation