T822/T827 Series • Owner's Manual
69-2251EFS—03 2
System Types
• Gas or oil
• Warm air, hot water, high-efficiency furnaces, heat pumps, steam, gravity
• Normally closed hot water valves (
T822K
)
• 2-wire cooling systems (
T822L
)
• Normally open hot water valves (
T822L
)
System Settings
• Heat, Off (select models only)
Fan Settings
• Auto, On (select models only)
Specifications
Temperature Control Range
• 45° to 95°F (7° to 35°C)
• 35° to 85°F (2° to 29°C)*
Operating Ambient Temperature
• 0° to 120°F (-18° to 49°C)
Operating Relative Humidity
• 5% to 90% (non-condensing)
Dimensions (vertical model)
• 2.88W x 4.75H x 1.5D (inches)
• 73W x 121H x 38D (mm)
Dimensions (horizontal model)
• 4.75W x 2.88H x 1.5D (inches)
• 121W x73H x 38D (mm)
Product application
This thermostat provides control of:
• 24 Vac heating systems (
T822K
)
• 750 mV or 12 Vdc heating systems (
T827K
)
• 24 Vac cooling systems (
T822L
)
* CAUTION:
Do not use a product with
this temperature control range in
a home. Temperatures at or below
freezing can occur. A product with this
temperature range is for use in areas
where temperatures below freezing
can occur, such as a garage.
Electrical Ratings
Terminal
Voltage (50/60Hz)
Running Current
W
1
Heating
20-30 Vac
0.02-1.2 A
W
2
(Powerpile)
750 mVdc
100 mAdc
W
2
(DC Powered)
12 Vdc
0.1 A
Y
3
Cooling
20-30 Vac
0.02-1.2 A
Y
3
Normally open zone valve
20-30 Vac
0.02-1.2 A
1
T822K
2
T827K
3
T822L
