Maytag POF1HD140AVFA Operations Instructions download pdf (Page 7)

19. CIRCULATING AIR BLOWER

(POF1HD140AVFAand POF1HD091AVFA)

The POF1HD140AVFA and POF1HD091AVFA furnace

models are equipped with direct drive blower systems.

POF1HD140AVFA and POF1HD091AVFA models are

equipped with electronically commutated motors (ECM).

Direct drive blower speed adjustments are not normally

required in properly sized extended plenum duct

systems. The motor RPM and air CFM delivery will vary

automatically to accommodate conditions within the

usual range of external static pressures typical of

residential duct systems. Under-sized duct systems may

require a higher blower speed to obtain a reasonable

system temperature rise. Some older duct systems were

not designed to provide static pressure. They typically

feature special reducing fittings at each branch run and

lack block ends on the trunk ducts. These systems may

require modification to provide some resistance to the

airflow to prevent over-amping of the direct drive blower

motor.

DISCONNECT THE POWER SUPPLY TO THE

FURNACE BEFORE OPENING THE BLOWER

ACCESS DOOR TO SERVICE THE AIR FILTER,

FAN AND MOTOR. FAILURE TO SHUT OFF

POWER COULD ALLOW THE BLOWER TO

START UNEXPECTEDLY, CREATING A RISK OF

DEATH OR PERSONAL INJURY.

19b. CIRCULATING AIR BLOWER

(POF1HD140AVFA and POF1HD091AVFA)

(See Section 22 Page 9)

1 2 3 4 5 6 7 8 9 10 11 12 ... 35 36

No comments

Maytag POF1HD140AVFA Operations Instructions Page 7