Installation Sheet
5 Page
Introducon
Installaon Manual
Combuson secons
The 910 has two combustion sections. The combustion section that turns on first is the primary section.
The secondary section will activate when the flow rate through the primary section meets the flow listed
in the table below.
Set temperature °F (°C )
Flow rate at which the
secondary section activates
GPM (L/min)
100-120 (38-49) 3.2 (12)
125,130 (52,54) 2.9 (11)
140 (60) 2.6 (9.8)
145,150 (63,65.5) 2.4 (9)
155-185 (68-85) 2.1 (8)
Example:
If the set temperature is 120 °F (49 °C ):
The section(s) in operation is indicated by the black square(s).*
910
OR
Total Flow < 0.5 GPM (1.9 L/min.)
(standby)
0.5 GPM (1.9 L/min) < Total Flow < 3.2 GPM (12 L/min.)
Total Flow > 3.2 GPM (12 L/min)
910910
910
*The primary and secondary combustion sections will alternate every 100 firing cycles or every 12 hours of opera-
tion.