Aprilaire 445 - Reservoir and Pump Maintenance; Cleaning the Reservoir; Cleaning the Hose and Nozzle; Cleaning the Pump

MAINTENANCE INSTRUCTIONS
FOR MODELS 445A-445
RESERVOIR PUMP SECTIONS
WARNING! 120 volts may cause serious injury from electrical shock. Disconnect power and shut off water supply
before servicing.
IMPORTANT: Clean and refill reservoir, hose, pump and float every 30 days during heating season.
Key
Pump Impellor Cap1.
Cap Sides2.
Impellor3.
Cap Flow Control Opening4.
Float5.
Arm Mechanism6.
TO CLEAN RESERVOIR
Hold bottom of reservoir (IT IS FILLED WITH WATER) and loosen retainer knob. Carefully lower reservoir,
disengaging from metal frame.
1.
Empty water, remove partition and reservoir liner.2.
Clean or replace reservoir liner. Reinstall partition in liner. To replace reservoir, hook back of reservoir over
lip of dark metal frame and tighten knob.
3.
A.
TO CLEAN HOSE
Disconnect hose from pump and pull hose up through hole.1.
Flex hose to loosen scale and flush clean with a stream of water.2.
Clean nozzle at the same time.3.
B.
TO CLEAN PUMP
Remove pump impellor cap (1) by pushing down on projecting sides (2).1.
Clean scale from inside of cover and impellor (3) with dull blade.2.
Clean flow control (4) in pump outlet with 5/32" bit.3.
Snap pump impellor cap (1) back in place.4.
Pull water hose down through hole, connect to pump, and attach nozzle into water distribution pan.5.
C.
TO CLEAN FLOAT
Clean scale off float (5) and arm mechanism (6) with dull blade.1.
D.