Outdoor Temperature Sensor (Optional) - Aprilaire 8400 Series Safety & Installation Instructions

INSTAllATION

OUTDOOR TEmpERATURE SENSOR (OpTIONAl)

Outdoor temperature can be measured by attaching an
8052 sensor to the S1 and S2 terminals. System setting
#05 (Remote sensor) is used to enable sensor.
Heat pump models can use the outdoor temperature to
effectively utilize the heat pump:
• W hen the outdoor temperature is less than the Low
Balance Point, the heat pump will be locked out and
only auxiliary heating will be used.
• W hen the outdoor temperature is higher than the High
Balance Point, the auxiliary heating will be locked out
and only the heat pump will be used to provide heating.
4
61000652C 8400 Tstat Install.indd 4
• I nstall on side of building out of direct sunlight
(north side recommended) .
• M ount above snow line.
• M ount at least 3' away from exhaust vents and
condensing lines .
• M aximum wire length is 300'.
• D o not route wires along 120 VAC lines.
RC R W Y G C S1 S2 O/B L W2 Y2
10/13/09 11:08:57 AM