FloAire FAV - Manual (Page 19)

19
Use the Amplifier to override the heater into high
fire.
On discharge temperature control amplifier
remove the #4 wire
On the space temperature control amplifier
remove the #2 and #4 wire
On the M-Series adjust the set-point to be
160 F
Adjust the manifold gas pressure to achieve the
desired discharge air temperature.
See the details for the high fire pressure
adjustment locations.
On manifolds with an MR212 modulation
valve, adjust the small regulator inside the
MR212 modulation valve
On manifolds with either an M511 or M611
modulation valve, adjust the regulator located
before the main gas valves
On manifolds with a combination gas valve,
adjust the regulator under the brass cap on
the combination gas valve.
Measure the discharge temperature using a
thermometer. Laser thermometers are not as
accurate as a thermocouple type.
If the discharge ductwork outlet is hard to reach,
you may feed a thermocouple into the mixing tube inside the blower discharge.
Setting High Fire – Manifold Pressure Method
Turn the burner service switch OFF
Measure the manifold pressure with the burner in high fire as described above
Adjust to match design manifold pressure on nameplate
Measure discharge temperature and calculate temperature rise as described above to account for
variances in airflow from design
HIGH FIRE
HIGH FIRE
HIGH FIRE
MR212
M511 & M611
36C68
GAS TYPE: NATURAL
MAX. TEMP. RISE: 140 F
DESIGN TEMP. RISE: 72 F
MAX. DISCHARGE TEMP.: 80
F