Solutions

Hot Thermostat Solutions

Robertshaw’s hot thermostats are designed for any appliance that needs temperature protection. They are the top choice for OEMs around the world for both residential and commercial applications.

K and S Series Thermostat

K and S Series

K and S Series Thermostat

Application: Commercial Cooking

The Robertshaw^® K and S Series Thermostat is a snap-acting, single pole single throw (SPST) type thermostat. The K models have a 25 Amp rating and the S models have a 30 Amp rating. The S and K each use silver contacts and have heavy-duty terminals for durability and sustained accuracy. The snap-action mechanism is precise and reliable. Thermostat applications include commercial appliances and industrial equipment.

Features and Benefits:

Temperature ranges up to 600°F (316°C)
K Series with NAK filled diastats, temperature ranges to 975°F (524°C)
Rugged and compact design for versatility and long life
Bulb and capillary available in copper, nickel plated copper and stainless steel
Plastic coating available for protection against moisture, dust, etc.
Heat resistant plastic dials available

Specifications:

Ambient temperature range: 32°F to 200°F (0°C to 93°C)
Single pole single throw (SPST) type switch
See chart on page 13 for options
Various voltages

Agency Certifications:

CSA 164327-1195960
UL E12103
CE US18299BIUL

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RX Series Millivolt Thermostat

RX Series

RX Series Millivolt Thermostat

Application: Commercial Cooking

The Robertshaw^® RX Series Millivolt Thermostat is a single pole single throw (SPST) thermostat designed for today’s demanding Millivolt/Milliamp direct current applications. The RX thermostat features a hermetically sealed reed switch to provide durability and accuracy in the harshest environments.

Features and Benefits:

Millivolt/Milliamp control for reliable low current/low voltage performance
Sealed contacts provide survival in the harshest environments
Robust design for increased reliability, durability, and reduced down time
Precise and proven snap-action mechanism
Screw type terminals ensure electrical integrity
Rugged steel case design
Bulb and capillary assemblies supplied in copper, nickel plated copper or stainless steel

Specifications:

Rated for 0.67 Amps at 5V DC
Ambient temperature rated 230°F (110°C)
SPST – Break on temperature rise
Nickel plated brass stuffing boxes available (.250″ or .375″ NPT and BSP)
Flat of shaft is down in the OFF position unless otherwise specified
Dials available in common temperature ranges
RXN models available up to 900°F (482°C) maximum

Agency Certifications:

UL E12103
CSA LR36461
CE 665984

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D1 Series Thermostat

D1 Series

D1 Series Thermostat

Application: Commercial Cooking

The Robertshaw^® D1 Series Thermostat is a heavy-duty control designed for use in harsh applications where precise temperature control is required. The thermostat uses a double pole single throw (DPST) snap-action mechanism that is instantaneous, positive and non-fatiguing. The D1 Series is recommended for applications that require double pole operation and accurate temperature control.

Features and Benefits:

Temperature ranges to 650°F (343°C)
DPST with positive OFF
Reacts to minute movements of the diaphragms for very close temperature differential
Diaphragm assembly features two stainless steel diaphragms electrically welded together for maximum sensitivity without overstressing the metal
Supplied with 4 terminals
Bulb and capillary available in copper, nickel plated copper, or stainless steel
Plastic coating available to protect against moisture, dust, etc.
Optional pilot light

Specifications:

Ambient temperature range: 0°F to 150°F (-18°C to 66°C)
Double pole single throw contacts (DPST)
Positive OFF – Contacts are mechanically open in OFF position
Electrical rating:
- 120, 277V AC, 30 Amps
- 480V AC, 10 Amps
- 277V AC, 250VA
- 125V AC, 125VA

Agency Certifications:

UL and CSA File No. E12103

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B10 Series Thermostat

Application: Commercial Cooking

The Robertshaw^® B10 Series Thermostat is a direct acting, single pole, slow make and break type thermostat. Typical applications are for incubators, laboratory ovens, water baths, sterilizers, dishwashers, steam tables, scalding tanks and other equipment where a close temperature differential is required.

Features and Benefits:

Temperature ranges to 550°F (288°C)
Single pole, slow make and break design
Very sensitive to temperature change
Small temperature differential between make and break
Fine silver contacts to assure consistent switch action and long life
Rugged and compact design for versatility of application
Bulb and capillary available in copper, nickel plated copper or stainless steel
Plastic coating available to protect against moisture, dust, etc.

Specifications:

Ambient temperature range: 32°F to 150°F (0°C to 66°C)
Electrical rating:
- 20 Amps @ 125V AC
- 15 Amps @ 250V AC
- 125VA PD @ 125V AC

Agency Certifications:

UL E12103
CSA LR36461

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C1 Series Thermostat and High Limit Control

C1 Series

C1 Series Thermostat and High Limit Control

Application: Commercial Cooking

The Robertshaw^® C1 Series Thermostats and High Limit Controls are standard hydraulic sensing thermostats and manual reset high limit controls for applications that require precise temperature control. The C1 Series is designed for applications such as pool and spa heaters, coffee brewers, hot water boosters, bain marie’s, pasta cookers, re-thermalizers, space heaters, and heated display units.

Features and Benefits:

C1 Series use a single pole or double pole, snap-acting switch for switching heavy resistive or inductive loads
Optional gold flash contact switch is offered to switch millivolt or pilot duty applications
Ambient temperature compensated to maintain accurate temperature control over a wide range of environmental conditions
C1-RX limit control features a manual reset M1 type switch or an automatic reset switch

Specifications:

Ambient temperature range: 32°F to 200°F (0°C to 93°C)
Single pole single throw (SPST) type switch

Agency Certifications:

UL E16835
CSA LR10499

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LC Series High Limit Control

LC Series

LC Series High Limit Control

Application: Commercial Cooking

The Robertshaw^® LC Series High Limit Control is designed for any appliance where temperature protection is needed. All LC Series controls are factory calibrated and non-adjustable. The LC Series is a proven high limit control for commercial and specialty applications.

Features and Benefits:

Calibrated temperature settings 340°F to 600°F (170°C to 316°C) in 5°F increments
Bulb and capillary assemblies available in copper, nickel plated copper or stainless steel
Available in manual reset or automatic operation
Control function designed to interrupt power in the appliance circuit at the calibrated temperature
Circuit automatically opens if the pressure integrity of the thermal element is compromised
Several mounting configurations available

Agency Certifications:

CSA 36461
UL 12103
CE 665982 and 665983

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ST Series Electric Thermostat

ST Series

ST Series Electric Thermostat

Application: Commercial and Residential Water Heating

The Robertshaw^® ST Series Electric Water Heating Thermostat is designed to meet the stringent requirements of the OEM in the residential and commercial electric water heating market. The control incorporates two thermostat functions – a cycling thermostat fitted with a vibration resistant range dial, and a high limit manual reset thermostat.

Features and Benefits:

Quick-fit lugs allow easy installation on the tank via mounting clips
Protective cover for terminals available
Bi-metal actuators in direct contact with the tank for faster reaction to temperature changes
Fast and easy wiring
High limit function switches both active and neutral lines
Custom temperature ranges available
ST12 models features M1 reset style
ST14 model features M2 reset style

Specifications:

Maximum ambient temperature: 185°F (85°C)
Differential of 14°F ± 7°F (8°C ± 4°C)
Cycling temperature ranges available:
- 110°F – 150°F (43°C – 65°C)
- 110°F – 170°F (43°C – 76°C)
- 90°F – 130°F (32°C – 54°C)
- 90°F – 144°F (32°C – 62°C)
Rated for 30 Amps at 240V AC
SPST or SPDT cycling contacts

Agency Certifications:

UL approved E110428

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