SAMUEL JACKSON HG-1-1501, Руководство по эксплуатации и обслуживанию

Страница: 24 / 49

PAGE 21 of 46 HG-1-1501 GAS-FIRED HEATER
© SAMUEL JACKSON, INCORPORATED 2011 ALL RIGHTS RESERVED
AIR FLOW SWITCH -- The blower will turn on for this test. Before proceeding, check
that the rotation of the blower is correct.
If the rotation is wrong, disconnect 3 phase power to the Heater following
OSHA lockout/tag-out procedures before proceeding.
Swapping the positions of two of the 3
∅
wires at the supply side of the motor contactor
(MC) will reverse the blower motor. After checking the wires a final time for tightness,
reconnect the power.
A variable pitch sheave on the blower motor can be adjusted to fine tune the air output of
the blower. The maximum blower RPM for the 3 HP motor is 2150 +/- 20 RPM. The
pulley comes from the factory set for maximum blower speed. It may be necessary to
slow the blower down for lower airflow applications. The blower will deliver between
750 and 3000 CFM of air depending on the blower’s speed and the total resistance to air
flow for the duct system.
TIPS
It is better to change the speed of the blower to get close to the desired air
volume than severely gating down the air flow from an over sped blower.
Variable pitch
sheave on motor.
Drive guard
removed for
illustration – do not
operate without
guard in place.