AprilairePartners.com
P.O. Box 1467 Madison, WI 53701-1467
800-334-6011 F: 608-257-4357
Printed in USA
©2015 Aprilaire – A division of Research Products Corporation
10006011 B2202110B 2.15
STep 4 – WIre The SenSor To The aprIlaIre conTrol
• Use 18–22 awg wire (2-wire thermostat cable).
• Use the two small wire nuts provided.
• Use less than 300' of wire.
• Do not route wire along 120VAC lines.
cauTIon
Excessive bare wire can lead to shorts.
Strip only as much insulation as is necessary.
• The sensor is not polarity specific. Either sensor lead may be
connected to either terminal on the Aprilaire control to which it
is wired.
– For support modules, use T1 and T2 or T3 and T4 terminals.
– For thermostats, use S1 and S2 (Outdoor) or T1 and T2 (Remote)
terminals.
– For zone controls, use DAT, Plenum Sensor or ODT terminals.
– For Home Comfort Control, use RAT, LAT or ODT terminals.
• Use care when routing and stripping the wire. Sharp bends (kinks)
or cuts in the wire (particularly susceptible where the insulation has
been stripped) can lead to eventual conductor failure.
STep 5 – reconnecT poWer To The aprIlaIre conTrol
Sensor Specifications:
Resistance @ 77°F (25°C): 10 k
Tolerance @ 77°F (25°C): ±3%
STep 2 – dISconnecT poWer To The aprIlaIre conTrol To
WhIch The SenSor WIll be WIred
cauTIon
Damage to components can occur if power is not disconnected.
STep 3 – VerIfy The SenSor reSISTance
Use an ohm-meter or multimeter to measure the resistance of the
sensor. Measure at the wires near the Aprilaire control to check any
wire splices. Confirm the resistance corresponds (within 5%) to the
temperature where the sensor is installed.
Temperature (°F)
Resistance (k )
30
34.6
40
26.1
50
19.9
60
15.3
70
11.9
80
9.4
90
7.4
100
5.9
note:
This measurement should be done without the sensor
connected to the Aprilaire control.
2