Electric boilers series SB, 375 - 600 kW
SB 375 - 600 kW
The larger series of Varmeteknikk's ridgid and reliable element boilers
350-600 kW are delivered for 3-phase power connection in 3x400 V or 3x690 V, and 450-600 kW in 3x230 V (other boiler dimensions). Other voltages may be delivered on request.
The regulator/controller is very user friendly, and regulates the power in 30 steps.
An optional outdoor sensor is avalable for optimized economical operation. The boiler output temperature is then compensated for the outdoor teperature according to a heat curve.
The boilers have digital and analogue in- and outputs for external control an monitoring, so that they may be visulized and controllerfrom the customers SCADA system. Optionally bus couplers may be delivered preinstalled for MODbus or BACnet communication.
The boilers may normally also be controlled directly from a heat pump.
Varmeteknikk boilers are delivered with standard DN125 - PN16 flanges.
Design data
| Design pressure | 6 bar |
| Design temperature | 110 °C |
| Max operational temperature | 100 °C |
| Water volume | 310 l |
| Min. flow | 1,3 l/s, 4,7 m3/h |
| Max flow | 21 l/s, 75 m3/h |
Hydraulic connection
| Connetion type | Flange DN125 - PN16 |
| Connection side | Rear |
| Drain and expansion/vent | G 2" |
Regulation
| Temperature range | 5 - 100 °C |
| Regulation steps | 30 |
| Steptime up | 1-250 s |
| Steptime down | 1-20 s |
| Regulation type | PI |
The boilers may also be delivered with connection box on left side.
This series may also be delivered in a 16 bar version.
230 V versions of the 450-600 kW boilers are delivered with side connection and two connection boxes.
See info for the larger models SB 450 - 1200 kW.
Power connection
| No. of connection boxes | 1 |
| Connection side | Right (standard) Left (optional) |
| No. of cables each box | 4 |
| No. of terminals each phase | 4 |
| Cable cross section | 35 - 240 mm2 |
| Max terminal current | 380 A Al - 425 A Cu |
| N-conductor | No |
Control voltage
| Voltage | 230 Vac - 50 Hz |
| Amperage | 10 A |
| Internal fuse | Ø5x20 mm, 10 A |
Signals for external control
| Control signals | |
| Start/stop | External potential free closing contact |
| Temp. setpoint | 0-10 Vdc = 0-100 °C |
| Max step/power | 0-10 Vdc = 0-30 steps |
| Monitoring | |
| Operation | Internal potential free closing contact |
| Alarm | Internal potential free changeover contact |
| Setpoint | 0-10 Vdc = 0-100 °C |
| Temp. | 0-10 Vdc = 0-100 °C |
| Step/power | 0-10 Vdc = 0-30 steps |
SB2375-2400, SB4375-4600, SB6375-6600
All dimensions in mm.
Technical data
| Type | NRF no. | Power (kW) | 3 x 230 V Current (A) | 3 x 400 V Current (A) | 3 x 690 V Current (A) | Net weight (kg) |
| SB 2375 | 8205361 | 375 | 941 | - | - | 450 |
| SB 2400 | 8205362 | 400 | 1004 | - | - | 450 |
| SB 4375 | 8205373 | 450 | - | 541 | - | 450 |
| SB 4400 | 8205374 | 400 | - | 577 | - | 450 |
| SB 4450 | 8205375 | 450 | - | 650 | - | 450 |
| SB 4500 | 8205376 | 500 | - | 722 | - | 450 |
| SB 4600 | 8205377 | 600 | - | 866 | - | 450 |
| SB 6375 | 8205391 | 375 | - | - | 314 | 450 |
| SB 6400 | 8205392 | 400 | - | - | 335 | 450 |
| SB 6450 | 8205393 | 450 | - | - | 377 | 450 |
| SB 6500 | 8205394 | 500 | - | - | 418 | 450 |
| SB 6600 | 8205395 | 600 | - | - | 502 | 450 |
Accessories
Outdoor sensor
Outdoor sensor for temperature compensated heatcurve regulation.
Dim. 60x60x30 mm.
Connection 2-core min. 0,5 mm2. Max length 50 m.
BUS-communication
Transfers all the standard digital and analoug signals to desired protocol MODbus TCP, MODbus RTU (RS485) or BACnet IP (different bus couplers).