FloAire FAV-M - Manual (Page 21)

21
Setting High Fire – Discharge Temp Method
Open the Burner Gas Shut Off Valve
Measure the intake air temperature.
Add the intake air temperature to the units nameplate design temperature rise.
This result will be the desired high fire discharge temperature.
Example: Intake Temp 70 F
Design Temp Rise
72 F
Discharge Temp 142 F
Use the Maxitrol Amplifier to override the heater
into high fire.
On the A1014 amplifier remove the #4 wire
On the A1044 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.
OPEN VALVE
GAS TYPE: NATURAL
MAX. TEMP. RISE: 140 F
DESIGN TEMP. RISE: 72 F
MAX. DISCHARGE TEMP.: 80
F
HIGH FIRE
HIGH FIRE
MR212
M511 & M611