SAMUEL JACKSON HO-1-114, Руководство по обслуживанию, Страница: 10 / 36

PAGE 6 of 32 HO-1-1143 OIL-FIRED HEATER
© SAMUEL JACKSON, INCORPORATED, 2009 ALL RIGHTS RESERVED
Adjusting Air Volume from Heater Fan
A variable pitch sheave on the fan motor can be adjusted to fine tune the output of the
fan. The maximum fan RPM for the 3 HP motor is about 1670 RPM. The fan will deliver
up to 4,000 CFM of air depending on the fan’s speed and the total resistance to air flow
for the duct system.
TIPS
It is better to change the speed of the fan to get close to the desired air volume
than severely gating down the air flow from an over sped fan.
A positive static pressure at the heater’s outlet is ok. However a negative static pressure
lower than -0.8 inches water column should be avoided. Consult the factory if it is
necessary to operate the burner at a pressure lower than -0.8 inches water column.
Variable
pitch sheave
5097-b
Static pressure here
should not be lower than
-0.8 inches water column.