MODEL 8870 THERMOSTAT SPECIFICATIONS:
Control Voltage | 24V AC ±20% |
Switched Voltage | 18 – 30V AC |
Maximum Operating Current | 2.0A total at rated voltage, through all outputs. |
| 1.0A through any one output. |
Maximum Surge Current | 2.0A |
Control Accuracy | ±1.0°F |
Control Range | 40° – 90°F |
Operating Range | 32° – 99°F |
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 | # OF HVAC WIRES | DIAGRAM | PAGE # |
Single Stage Furnace & AC | 5 | 1 | 16 |
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Two Stage Furnace & Two Stage AC | 7 | 2 | 17 |
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Roof Top Unit (Two Stage Heat & Two Stage Cool) | 7 | 3 | 18 |
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Boiler with AC (Two Transformers) | 5 | 4 | 19 |
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Single Stage Heat Pump | 7 | 5 | 20 |
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Two Stage Heat Pump | 9 | 6 | 21 |
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First Stage Radiant Floor Heat |
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Second Stage Furnace One Stage of Cooling | 6 | 7 | 22 |
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