Aprilaire 1150 ユーザーズマニュアル

Run wire to the outdoor temperature sensor. Sensor is not affected by lead
length up to 300 feet. Use standard thermostat wire. Do not run outdoor
temperature sensor alongside wires carrying high voltage (120 VAC
or higher).

Wire the Control to the field wiring terminal block of the Steam Humidifier
according to Figure 9. Use 3-wire shielded cable with ground for the wiring
from the Control to the Humidifier. Note the terminal designations below.

I+, I- Serial Communications (for optional devices)

+24 VDC input power

Common

Command Signal to Steam Humidifier

Command Signal to ground (not used)

ODT Outdoor Temperature Sensor

+24 VDC output power

Humidifier Common

Command Signal from Control

Strip wires 1/4 inch, and insert the wires from the Sensor into the terminals
labeled “ODT” on the Automatic Steam Humidifier Control.

1. Insert the Manual Mode Resistor Case into the terminals

labeled “ODT” on the Automatic Steam Humidifier Control.

2. Snap the Manual Mode Resistor Case into the slot

provided so that Resistor Case sticks out from the bottom
edge of the base.

3. Remove the control knob and apply the Manual Mode

label to the cover, aligning the sticker and knob holes.
Re-install the knob.

6

9

12

15

H-

ODT

I+

I-

C

24V

H+

3

2

1

JP2

R17

90-899

3-WIRE SHIELDED
CABLE W/GROUND

HUMIDIFIER PANEL

SHIELD GND LUG

COMMAND
SIGNAL

+24VDC

COMMON

TO OUTDOOR

TEMPERATURE

SENSOR

SERIAL COMMUNICATION

TO APRILAIRE MODEL 8570

THERMOSTAT (OPTIONAL)

STEAM
HUMIDIFIER
FIELD WIRING
TERMINAL 
BLOCK

90-900

1. For system test, be sure that all Steam Humidifier plumbing, distribution,

and electrical connections are set-up in accordance with the instructions
in the Steam Humidifier Installation, Operation, and Maintenance Manual
and all precautions therein are followed.

2. Turn on the water supply to the humidifier. Make sure the drain valve 

is closed.

3. Turn on power to the humidifier.

4. Set up a fan call at the thermostat. If the humidifier is configured to bring

on the equipment fan when a demand for humidity is recognized, skip to
the next step.

5. Initiate a humidity demand from the Control by rotating the control 

knob of the Automatic Steam Humidifier Control clockwise to the 
‘Test’ position.

36" MAX.

CENTER
LINE

OUTSIDE WALL

FRESH AIR INTAKE

90-896