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T822/T827 Series • Owner's Manual
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)
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)
Electrical Ratings
Terminal
1
W
Heating
W
2
(Powerpile)
W
2
(DC Powered)
Y
3
Cooling
Y
3
Normally open zone valve
1
T822K
2
T827K
3
T822L
69-2251EFS—03
Voltage (50/60Hz)
20-30 Vac
750 mVdc
12 Vdc
20-30 Vac
20-30 Vac
2
*
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.
Running Current
0.02-1.2 A
100 mAdc
0.1 A
0.02-1.2 A
0.02-1.2 A
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