Wire Requirements; Select A Mounting Location - Aprilaire 8570 Safety & Installation Instructions

WIRE REQUIREMENTS

Figure 1 and the table show the number of wires that must be available at the thermostat in stand-alone thermostat systems
(i.e. not as part of an Aprilaire ® Model 6504 Intelligent Zoned Comfort System). Figure 1 shows optional connections to both
an outdoor temperature sensor and an Aprilaire ® Automatic Digital Humidifier Control (ADHC), but only one or the other is
necessary. All wire is standard 18-24 gauge thermostat cable.
Figure 1 – Thermostat Wire
OPTIONAL –
AUTOMATIC
HVAC
DIGITAL HUMIDIFIER
EQUIPMENT
CONTROL
(ADHC)
SEE
OPTIONAL –
OPTIONAL –
2-WIRES
TABLE
INDOOR
OUTDOOR
TEMPERATURE
TEMPERATURE
SENSOR
SENSOR
2-WIRES
2-WIRES
MODEL 8570
THERMOSTAT
When this thermostat is connected to a Model 6504 as
shown in Figure 2, only one four-wire cable need be run
from the thermostat to the Model 6504. Use standard
18-24 gauge thermostat cable.
Application # Wires Diagram (Page)
Single-Stage Furnace/AC 5 1 (9)
Two-Stage Furnace/AC 7 2 (10)
Two-Stage Roof Top Unit 7 3 (11)
Boiler w/AC (2-transformer) 6 4 (12)
Radiant 1st Stage Heat, 6 5 (13)
Furnace 2nd Stage and AC
Single-Stage Heat Pump 6 6 (14)
Single-Stage Heat Pump 7 7 (15)
w/Two Stages Aux. Heat
Two-Stage Heat Pump 8 8 (16)
Figure 2 –
MODEL 8570
4-WIRES
Model 6504 MODEL 6504
THERMOSTAT
Wire
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(1) SELECT A MOUNTING LOCATION

If installing the thermostat alone...
• Mount on an interior wall, in a frequently occupied space.
• Keep the thermostat 18" from an outside wall.
• Mount the thermostat approximately 5 feet above the floor.
Height requirements are different for compliance with the
Americans with Disabilities Act (ADA) – 48" maximum height
for forward reach and 54" maximum height for side reach.
• Thermostat can be mounted to a vertical junction box (j-box).
• DO NOT mount the thermostat:
– behind doors, in corners or other dead air spaces.
– in direct sunlight or near lamps, appliances or other
sources of heat.
– on an outside wall or wall exposed to an unconditioned
space (i.e. garage).
– in the flow path of a supply register, in stairways or near
outside doors.
– on a wall where concealed pipes or ductwork could
influence the sensor.
– near sources of electrical interference such as arcing
switch contacts.
If installing an indoor temperature sensor...
• Mount the thermostat where it can be readily accessed.
Note that the backlighting illuminates whenever a button
is pressed.
• Thermostat can be mounted on a vertical junction box (j-box).
• DO NOT mount the thermostat where the operating range
temperatures will be exceeded (i.e. attic or unventilated
equipment room).
• Mount the sensor in the same location as if installing a
thermostat alone.
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