PRODUCT DESCRIPTION
These Aprilaire
®
thermostats are designed for new or replacement heat pump applications. Each
one represents the latest in solid-state, surface-mounted electronics and manufacturing
techniques, incorporated into a unique, ultra-thin ABS plastic case. They offer “user-friendly” control
{and programming with model 8555} of the heat pump system along with an easy-to-read vertical LCD
that displays complete equipment operation status. An easily installed direct wire sub-base mounts on
a standard vertical outlet box or any dry wall surface using provided anchors and hardware.
STANDARD FEATURES
8555
8537
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Energy Star Compliance.
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Meets CA Title 24 Requirements
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Selectable Celsius or Fahrenheit temperature display.
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Fan button for continuous fan operation.
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Built-in short cycle protection.
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Electronic circuitry instead of conventional mechanical anticipator.
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Built-in fossil fuel kit for dual fuel applications with optional
adjustable balance points {requires outdoor Temperature Sensor Model 8041}.
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Internal keypad lockout switch to prevent unauthorized tampering.
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Lockable access cover.
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No battery required {always maintains the program and mode
of operation following power outages of any duration}.
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O and B reversing valve outputs.
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Day/Night button for one-touch set-back.
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Outdoor temperature sensor {optional}.
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Indoor remote temperature sensor {optional}.
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Adapter plate to cover unpainted walls or discolored wallpaper {optional}.
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Independent circuit switching {allows 24-volt AC or DC power}.
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Remote clock terminals for automatic temperature set-back.
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Built-in auxiliary heat light indicator.
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Two free LEDs.
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Dry contact relay outputs.
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Switchable LCD service symbols {icons}.
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7 day programming with 2 or 4 events per day.
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12- or 24-hour clock.
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Copy feature to allow one program to be copied to subsequent days.
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Temperature override {3 hours} and Continuous override {Hold}.
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2˚F {1˚C} minimum Heat/Cool separation.
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Short cycle protection – minimum on/off time {2- or 4-minute selectable}.
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3-stage heat; 2-stage cool.
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2-stage emergency heat.
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Product Profile:
Actual Size
P R O D U C T S P E C I F I C A T I O N S
Multi-Stage Heat Pump Thermostats
Models 8555 and 8537
(SHP 2) and (DSL 600)
