Control
Single-pole regulating thermostat
The stem's thermal expansion opens a snap-action switch and holds the water at the set temperature.
- Connection for a signal lamp
BALÇIK TORMEC stem-type thermostats
Control and safety in one head, plugged onto the element.
A rigid sensing stem in the pocket tube acts on a snap-action switch: direct switching without electronics, tolerant of the humidity and temperature inside a water-heater terminal cover.
BALÇIK TORMEC acquired the Italian brand Tormec in 2006; today stem thermostats are designed and manufactured by BALÇIK TORMEC for storage water heaters, boilers and some industrial tanks. The current range covers mechanical and liquid-expansion designs, supplied separately or fitted to our water-heater elements.
Tormec
Key specifications
Typical values for water-heater duty.
From our specifications master. Settings, stem length and terminals are configured per project.
| Parameter | Typical series value |
|---|---|
| Stem diameter and length | Ø 6 – 8 mm stem; stem lengths 150 – 450 mm typical (e.g. 270, 300, 350, 450 mm) |
| Materials | Stem: copper or stainless steel; housing: thermoset or thermoplastic insulating body; contacts: silver alloy |
| Regulating range | Adjustable, typically 20 – 80 °C (hot water); fixed or adjustable to 90 °C on request |
| Safety cut-out | Fixed, typically 85 – 110 °C; manual reset (non-self-resetting) for storage water heaters, automatic reset only where the appliance standard allows it |
| Switching capacity | 16 A / 20 A at 250 V AC single-pole; 16 A / 400 V three-pole versions for 3-phase heaters |
| Voltage | 230 V single phase; 400 V three phase |
| Terminal types | 6.3 mm flat tabs, screw terminals, M4 studs; earth connection via mounting bracket |
| Mounting | Bracket clamped to element flange, pocket tube Ø 8 – 10 mm; adjusting knob or screwdriver setting |
Values are typical; the final design is confirmed by BALÇIK TORMEC engineering. All eight product groups: Specifications by product group.
Versions
One platform, four versions.
How the temperature is controlled, how the safety limiter acts and who sets the temperature – every version plugs directly onto the heating element.
Control and safety
Regulating and safety cut-out combination
Single-pole control and a double-pole safety limiter in one tamper-proof head. The limiter opens both poles on over-temperature and stays open until reset by hand.
- Stem-actuated limiter, or an independent bimetal limiter as an option
Three-phase
Two-pole and three-pole versions
Versions that switch all live conductors, for 400 V three-phase water heaters and tanks.
- 16 A / 400 V three-pole
Setting
Factory-set or adjustable
Fixed temperature set during calibration and protected by the housing, or adjusted by the appliance maker in production or by the end user with a knob.
- Multiple control-knob options
Archive: the 2016 brochure of the hybrid (electronic) stem thermostat stays available as a PDF of the hybrid thermostat brochure and as an online flip-book of the brochure. The hybrid model is not in current sales, and values in the archive edition may be outdated – current specifications are in the table above.
Anatomy
A stem that senses, a switch that snaps, a cut-out that stays open.
The stem sits in the pocket tube next to the element. Its expansion drives the snap-action switch of the regulating contact; a separate safety cut-out opens on over-temperature and needs a manual reset.
Element and controlBALÇIK TORMEC thermostats are supplied separately or fitted to our water-heater elements as one assembly.
One supplier for element and control
Matched assemblies, fewer interfaces.
Specifying element and thermostat together removes a supplier interface and a wiring step from your line – and puts one engineering team behind the assembly.
- Plugs directly onto the element – less wiring and lower mounting cost than a separately mounted thermostat.
- Specified together through co-design: stem length, pocket position, settings and terminals.
- Calibrated in a computerised process and protected by a tamper-proof housing.
- Earth connection through the mounting bracket.
Design considerations
Four choices that decide how the water heater behaves.
Stem, contacts, cut-out and the control standard – fixed on the drawing together with the element.
Stem length and position
The stem senses the water around it. Its length – typically 150 – 450 mm – and the pocket position decide which water layer the thermostat controls.
Contacts and current
Silver-alloy contacts rated 16 A / 20 A at 250 V AC single-pole. Size the rating to the element current: a 3000 W element at 230 V draws about 13 A.
Safety cut-out
Fixed, typically 85 – 110 °C, and independent of the setting knob. Manual reset for storage water heaters; automatic reset only where the appliance standard allows it.
Control standards
Designed to EN 60730-1 and EN 60730-2-9 (automatic electrical controls, temperature sensing controls); RoHS and REACH declarations available.
Validation: each thermostat is calibrated in a computerised process; element-and-thermostat assemblies are checked in our validation laboratory – functional check, dielectric strength, insulation resistance and leakage current. How we test – quality and laboratory
Liquid heating elementsFlange elements the thermostat plugs onto
CataloguesArchive editions, including the 2016 brochure
Energy efficiencyHow control accuracy affects losses
Co-designElement and thermostat specified together
CertificatesISO 9001, VDE approvals and declarations
Download centreCertificates and declarations
Online catalogue
TR-1 and TRS in our online catalogue.
Data sheets of the single-pole regulating thermostat and the regulating and safety combination.
Specify the element and its control in one drawing.
Send the tank volume, element power, voltage and required settings. We propose stem length, pocket position and cut-out temperature together with the element.