Electrical Wiring; Grille Installation - Aprilaire 850 Installation & Maintenance Instructions Manual

InSTallaTIon InSTRUCTIonS

eleCTRICal WIRInG

Mount the Manual Humidistat in the area to be humidified according to installation instructions included with control . Install the
humidistat in the same room or area as the Model 850 discharge, but at least ten feet away . Wire the Manual Humidistat to the Model 800
using standard 24 volt thermostat wire . See Figure 8 .
Disconnect all power to Model 800 before wiring the Model 850 terminals to the FAN PACK terminals on the Model 800. Use standard 24 volt
thermostat wire . See Figure 8 .
FIGURe 8 – Wiring Diagram for Manual Humidistat and Model 850
Model 65 Digital Control
4851 Bower Activation Relay
Yellow (C)
120VAC 24VAC
Continuous Powered
Transformer (24V)
Model 850 Steam Humidifier Fan Pack

GRIlle InSTallaTIon

Use the two 5/8" screws to attach the Model 850 grille to the fan housing and drywall. See Figure 6 . If painting the grille is desired, see a
painting professional for acceptable paint products for high temperature (212°F), high humidity environments .
(ConTInUeD)
C
24VAC
R
H
H
White/Yellow
White/Blue
Blue (NC)
Cap
Not Used
Aprilaire Model 800 Steam Humidifier
TRANSFORMER
24V COM
Tap Connectors
Circuit Board
Transformer
90-1816
7