24 / 221
THERMOSTATS
1C26-101
1C20-101
MECHANICAL
THERMOSTATS
?
PAGE
165
ECONOMY MECHANICAL thermostats –
MERCURY-FREE
Reliable Performance in an Attractive Design
FEATURES
• Rugged snap-action contacts.
• Adjustable heat anticipator.
• Bi-Metal thermometer.
• Heat / Cool model includes switching subbase.
• Heat / Cool model compatible with Electric Heat systems.
SPECIFICATIONS
Anticipation Rating, Heating . . Adjustable from 0.15 to 1.2 Amps
Anticipation Rating, Cooling . . Fixed
Differential, Heating . . . . . . 2°F (1.1°C)
Differential, Cooling . . . . . . 4°F (2.2°C)
Dimensions . . . . . . . . . 3
3
/
4
”
H x 2
7
/
8
”
W x 1
1
/
2
”
D
Dimensions, Switching Models . 3
3
/
4
”
H x 3
1
/
8
”
W x 1
5
/
8
”
D
Electrical Rating . . . . . . . . . . . . . . mV to 30V, 50/60 Hz or DC
PARTS AND ACCESSORIES
See end of thermostats section for additional parts and accessories
• Wallplate F61-2499 — 5
1
/
8
”
H x 5
”
W
• Thermostat Guards — see pages 34–35
TECHNICAL HELP
Configuration/Wiring . . . . . . . . . See page 165
Model
Number
Typical
Application
Stages
Heat / Cool
System
Switch
Fan
Switch Contacts
Anticipation
Heat / Cool
Range
Shape
Terminals
1C20-101
Heat Only
➂
1
None
➀
None Snap-Action
Adjustable
50-90°F (10-32°C)
Vertical
R, W
1C20-102
Heat Only
1
None
None Snap-Action
Adjustable
50-90°F (10-32°C)
Vertical
R, W
1C21-101
Cool Only
1
None
None Snap-Action
Fixed
50-90°F (10-32°C)
Vertical
R, Y
1C26-101
Heat / Cool
➁
➂
1 / 1 Heat-Off-Cool
Auto-On Snap-Action Adjustable / Fixed 50-90°F (10-32°C)
Vertical
RC, RH, W,
Y, O, B, G, A
➀
Lowest temperature setting is “OFF” position
➁
Includes optional “A” terminal connection for Electric Heat systems that require the thermostat to energize the Blower (G terminal) on a call for heat
➂
Includes F61-2499 wall mounting plate to cover marks left by previous thermostat
24 VOLT
www.white-rodgers.com25