106 / 221
WELL IMMERSION
CONTROLS
HYDRONIC
CONTROLS
11D18-1
SPDT Contact Structure
HH Rated Controls
Switch Action
R-B Open on Rise
R-W Close on Rise
CONTRACTOR TIP:
TESTING AUTOMATIC TEMPERATURE CONTROLS
To verify a control is opening and closing properly,
disconnect all power before testing. Testing must be performed with the sensing element at a temperature within the setting range of the
control. For most hydronic controls with a range of 100 to 240°F, a pan of hot water is sufficient to reach the control range.
Attach an ohmmeter or continuity tester across the Open on Rise contacts. Lower the temperature setting dial to the lowest setting.
If the lowest setting is below the temperature of the sensing element minus the differential of the control, the contacts should be open.
Raise the temperature dial slowly. When the setting is raised above the temperature of the sensor, the contacts should close.
TYPES WITH BULBS DIRECTLY INTERCHANGEABLE WITH HONEYWELL
(3
9
/
16
” x
3
/
8
”
)
No wells included.
Model
Number
Range
Differential
Switch
Action
Full
Electrical
Rating
Motor Rating
(Full Load)
Valves and
Relays
120 VAC 240 VAC
24 VAC 0.3-12v DC
11D18-1
➀
100 to 240°F
(38 to 116°C)
5 to 45°F
(3 to 25°C)
Open on Rise
HTV
See page 222
10.0A
6.0A
6.0A
1.0A
11D31-1
100 to 240°F
(38 to 116°C)
7 to 45°F
(4 to 25°C)
SPDT
HH
See page 222
7.4A
3.7A
2.9A
—
➀
Has U.L. approved adjustable dial stop, factory set at 150°F maximum.
TYPES WITH TAPERED BULBS
(2
7
/
16
” x
7
/
16
”
)
All types include
1
/
2
”
standard shank well, unless otherwise specified.
Model
Number
Range
Differential
Switch
Action
Full
Electrical
Rating
Motor Rating
(Full Load)
Valves and
Relays
120 VAC 240 VAC
24 VAC 0.3-12v DC
1131-102
➀
100 to 240°F
(38 to 116°C)
7 to 45°F
(4 to 25°C)
SPDT
HH
See page 222
7.4A
3.7A
2.9A
—
11B18-101
➀
100 to 240°F
(38 to 116°C)
5 to 45°F
(3 to 25°C)
Open on Rise
HTV
See page 222
10.0A
6.0A
6.0A
1.0A
➀
Has U.L. approved adjustable dial stop, factory set at 150°F maximum.
WELL IMMERSION SINGLE CONTROL
Types for Use as High Limit, Reverse Action or SPDT Switching
Action: May be Mounted Either Horizontal or Vertical
FEATURES
• Extra capillary length for extended shank wells.
• Special screw terminals with “ears” securely hold solid and stranded wires.
• Screwdriver-adjustable differential with direct-read indicator.
• Knockouts on top and bottom and plenty of wiring room.
• Hydraulic action element – fast acting.
SPECIFICATIONS
Dimensions . . . . . . . . . . . . 5
3
/
8
”
H + 2
5
/
16
”
coil x 2
9
/
16
”
D
Finish . . . . . . . . . . . . . . Grey
Agency . . . . . . . . . . . . . . . . . . . . . . . . . . . U.L. listed and C.S.A. approved
PARTS AND ACCESSORIES
See end of this section for additional parts and accessories
• F145-0163 — Tube heat conductive compound
• Immersion wells — see page 108
www.white-rodgers.com107
HYDRONIC /
APPLIANCE