Electrical Wiring - Aprilaire 850 Installation & Maintenance Instructions Manual

INSTALLATION INSTRUCTIONS

ELECTRICAL WIRING

Disconnect all power to the Steam Humidifier
before wiring the Fan Pack . Use standard 24
volt thermostat wire .
Mount the humidistat in the area to
be humidified according to installation
instructions included with the control . Install
the humidistat in the same room or area as the
Fan Pack discharge, but at least ten feet away .
Wire the Manual Humidistat to the Model
800 using standard 24 volt thermostat wire .
See Figure 8 . Remove the 40VA transformer
from the Steam Humidifier and replace with
the 75VA transformer supplied with the Fan
Pack (necessary for service part 5658 only) . If
using the Model 65 Digital Manual Humidistat,
place the provided wire harness between
the control board and the 24VAC output
of the transformer . Connect R and C of the
humidistat to the red and white wires of the
wire harness .
When using the Model 801 Modulating
Steam Humidifier with the Modulating Control
(#5558), use the wiring diagram in Figure 9 .
DO NOT USE the included wire harness .
(CONTINUED)
FIGURE 8 – Wiring Diagram for Manual Humidistat and Fan Pack
MODEL 65 DIGITAL CONTROL
C
R
H
H
STEAM HUMIDIFIER
FAN PACK
WIRE:
18 AWG ACCEPTABLE FOR
24 VAC APPLICATION
90-2198
FIGURE 9 – Wiring Diagram for Modulating Control and Fan Pack
MODEL 63 ADMC
1
2
36.
%RH
7
6
12
13
14
24VAC
STEAM HUMIDIFIER
FAN PACK
ON
1
2
3
4
MODULATING STEAM HUMIDIFIER
DIP SWITCH POSITION
WIRE:
18 AWG ACCEPTABLE FOR
24 VAC APPLICATION
90-2199
WHITE
24VAC
RED
HUMIDISTAT
24VAC
YELLOW
FAN PACK
BLUE
WHITE
RED
BLUE
YELLOW
TRANSFORMER
APRILAIRE MODEL 800 STEAM HUMIDIFIER
+24V
IN
GND
APRILAIRE MODEL 801 MODULATING STEAM HUMIDIFIER
P4
CIRCUIT
BOARD
7