Model 8870 Thermostat Specifications; Hvac System Pre-Installation Check List; What's In The Box; Select The Thermostat Location - Aprilaire 8870 Installation Instructions Manual

MODEL 8870 THERMOSTAT SPECIFICATIONS:

Control Voltage
Switched Voltage
Maximum Operating Current
Maximum Surge Current
Control Accuracy
Control Range
Operating Range

1. HVAC SYSTEM PRE-INSTALLATION CHECK LIST

Before getting started determine what type of heating system is/will be installed in the house.
Then use Table 1 to determine if the proper numbers of wires are available depending on the
HVAC System. Additional wires will be required for communication system.
TABLE 1
APPLICATION
Single Stage Furnace & AC
Two Stage Furnace & Two Stage AC
Roof Top Unit (Two Stage Heat & Two Stage Cool)
Boiler with AC (Two Transformers)
Single Stage Heat Pump
Two Stage Heat Pump
First Stage Radiant Floor Heat
Second Stage Furnace One Stage of Cooling
2
24V AC ± 20%
18 – 30V AC
2.0A total at rated voltage, through all outputs.
1.0A through any one output.
2.0A
± 1.0°F
40° – 90°F
32° – 99°F
# OF HVAC WIRES DIAGRAM
5 1
7 2
7 3
5 4
7 5
9 6
6 7

2. WHAT'S IN THE BOX

• Thermostat ( Figure 1 ): front panel, cover, and base
• Installation Manual
• Owners Manual
• Hardware bag: screws and wall anchors
FIGURE 1
Front Panel

3. SELECT THE THERMOSTAT LOCATION

PAGE #
Determine if the thermostat will be operating alone, or with remote temperature sensors.
16
If the unit is stand-alone there are certain measures that must be taken to ensure accurate
17
temperature control.
18
STAND-ALONE THERMOSTAT MOUNTING CRITERIA:
19
• Mount on an interior wall.
20
• In a room frequently occupied.
21
• At least 18 inches from any outside wall.
• Approximately 5 feet above the floor. Check with local building codes for height
22
requirements in commercial applications.
Cover
Base
3