Electric boilers series SB, 450 - 1200 kW
SB 450 - 1200 kW
The largest series of Varmeteknikk's ridgid and reliable element boilers
750-1200 kW are delivered for 3-phase power connection in 3x400 V or 3x690 V, and 450-750 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 | 620 l (310 l for 230 V models) |
| Min. flow | 1,3 l/s, 4,7 m3/h |
| Max flow | 21 l/s, 75 m3/h |
Hydraulic connection
| Connection type | Flange DN125 - PN16 |
| Connection side | Right (standard) Left (option) |
| Drain and expansion/vent | G 2" |
Regulation data
| 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.
Power connection
| No. of connection boxes | 2 |
| Connection side | Right (standard) Left (option) |
| 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
| Control 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 |
SB2450-2600. These 230 V models are for Norwegian deliveries only.
All dimensions in mm.
SB4750-41200, SB6750-61200
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 2450 | 8205355 | 450 | 2 x 565 | - | - | 950 |
| SB 2500 | 8205356 | 500 | 2 x 628 | - | - | 950 |
| SB 2600 | 8205357 | 600 | 2 x 753 | - | - | 950 |
| SB 2750 | 8205366 | 750 | 2 x 941 | - | - | 950 |
| SB 4750 | 8205378 | 750 | - | 2 x 542 | - | 950 |
| SB 4800 | 8205379 | 800 | - | 2 x 577 | - | 950 |
| SB 4900 | 8205381 | 900 | - | 2 x 650 | - | 950 |
| SB 41000 | 8205382 | 1000 | - | 2 x 722 | - | 950 |
| SB 41100 | 8205383 | 1100 | - | 2 x 794 | - | 950 |
| SB 41200 | 8205384 | 1200 | - | 2 x 866 | - | 950 |
| SB 6750 | 8205396 | 750 | - | - | 2 x 314 | 950 |
| SB 6800 | 8205397 | 800 | - | - | 2 x 335 | 950 |
| SB 6900 | 8205398 | 900 | - | - | 2 x 377 | 950 |
| SB 61000 | 8205399 | 1000 | - | - | 2 x 418 | 950 |
| SB 61100 | 8205401 | 1100 | - | - | 2 x 460 | 950 |
| SB 6120 | 8205402 | 1200 | - | - | 2 x 502 | 950 |
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).