Programming
made Simple
See page 7
INDEX
Thermostat Installation
2-4
Wiring
2
Installer Menu
3-4
Test Equipment
4
Using the Thermostat
5-7
Thermostat Overview
5
User Menu
6
Thermostat Operation
6
7
Thermostat Schedule
7-8
Troubleshooting
8
Homeowner Help Line
SPECIFICATIONS
Electrical Rating:
Battery Power ..................................... mV to 30 VAC, NEC Class II, 50/60 Hz
Input-Hardwire .................................... 20 to 30 VAC, NEC Class II, 50/60 Hz
Terminal Load .......................................... 1.5 A per terminal, 2.5A maximum all terminals combined
Setpoint Range ........................................ 45° to 99° F (7° to 37° C)
Rated Differentials (@ 6°F/ Hr):
Fast
Heat (Conventional Gas / Oil / Elect) ..... 0.5°F
Cool (Central Air) ................................. 0.9°F
Heat Pump (Heat and Cool) ................ 0.9°F
Heat Pump Aux. .................................. 0.5°F
Operating Ambient .................................. 32°F to +105°F (0° to +41°C)
Display Temperature Range ....................... 32°F to +99°F (0 to 37°C)
Operating Humidity ................................. 90% non-condensing maximum
Shipping Temperature Range ................... -20°F to + 150°F (-29° to +65°C)
Thermostat Dimensions ........................... 3-3/4" H x 6" W x 1-1/8" D
OH-522 (Programmable)
Installation and Operating Instructions
Universal Thermostat
Battery Powered or Hardwired with Common
Optional Accessory: Wall
Cover-Up Plate F61-2663,
6 3/4" W x 4 1/2" H
Maximum
Thermostat Applications
Stages
Heat/ Cool
Conventional Gas, Oil, Electric
(mV and 24V), Heat only, Cool only or
Heat/Cool Systems
Heat Pump (Air Source or Geothermal)
with Aux. Heat
MERCURY NOTICE: This product does not contain
mercury. However, this product may replace a product
that contains mercury. Mercury and products containing
mercury must not be discarded in household trash.
Refer to www.thermostat-recycle.org for information
on disposing of products containing mercury.
Med
Slow
0.75°F
1.9°F
1.2°F
1.7°F
1.2°F
1.7°F
0.75°F
1.9°F
PART NO. 37-7639B
Replaces 37-7639A
2/2
2/1
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