Model 350, 360 - Aprilaire 220 Service Manual

INDIVIDUAL UNIT SERVICE—MODELS 350 & 360
WARNING: 1. 120 VOLTS may cause serious injury from electrical shock. Disconnect
power and shut off water supply before servicing or troubleshooting
these units.
2. Rotating or electrical components may cause serious injury from con-
tact. Keep hands and face clear when checking operation.
I. LACK OF HUMIDITY
●
Check The Home — See Pages 2 and 3.
●
Check Furnace Operation — See Page 3.
●
Check The Humidity Control — See Page 4.
●
General Maintenance — See Pages 4 and 5.
1. AIR FLOW — Disconnect electrical power and remove the inlet grille and Wet Pak
With hands and face clear, reconnect electrical power. If the fan blade is not rotating and
the motor shaft is, disconnect electrical power and secure the blade on the shaft. When
the blade is in the proper position, 1/3 of the blade extends thru the orifice towards the
outlet adapter or grille and 2/3 is thru the orifice towards the motor.
(2) YELLOW WIRES
TO HUMIDISTAT
CORD & PLUG
TO 120VAC
60Hz POWER
SUPPLY
2. ELECTRICAL COMPONENTS — All components should be tested in place before
removal, making sure all electrical connections are secure and there are no breaks in the
service. The 120 volt humidifier control replaces the relay/transformer after Serial No.
17500 (Model 350) and after Serial No. 16715 (Model 360).
II. EXCESS HUMIDITY
III. LEAKING WATER
IV. NOISE
— See Page 4.
V. GENERAL MAINTENANCE
RELAY TRANSFORMER OR
120 VOLT HUMIDIFIER CONTROL
GREEN
BLACK
WHITE
GREEN
GROUND
— See Page 4.
— See Page 4.
— See Pages 4 and 5.
- 19-
BLUE
FAN
BLACK
BLACK
BLACK
BLACK
®
.