Electric boilers series MB, 35 - 150 kW
MB 35 - 150 kW
The smallest series of Varmeteknikk's ridgid and reliable element boilers
35-150 kW are delivered for 3-phase power connection in 3x230V, 3x400 V or 3x690 V. Other voltages may be delivered on request.
The regulator/controller is very user friendly, and regulates the power in 7 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 MB boilers are delivered with standard DN65 - PN16 flanges.
Design data
| Design pressure | 6 bar |
| Design temperature | 110 °C |
| Max operational temperature | 100 °C |
| Connection type | Flange DN65 - PN16 |
| Connection side | Rear |
| Drain and expansion/vent | G 1" |
| Water volume | 75 l |
| Min. flow | 0,2 l/s, 0,72 m3/h |
| Max flow | 6 l/s, 22 m3/h |
Hydraulic connection
| Connection type | Flange DN65 - PN16 |
| Connection side | Rear |
| Drain and expansion/vent | G 1" |
Regulation data
| Temperature range | 5 - 100 °C |
| Regulation steps | 7 |
| Steptime up | 1-250 s |
| Steptime down | 1-20 s |
| Regulation type | PI |
Power connection
| No. of connection boxes | - |
| Connetion side | Under - sides |
| No. of cables each box | - |
| No. of terminals each phase | 1-2 hook-on clamps/shoes (not supplied) |
| Cable cross section | 35 - 240 mm2 |
| Max terminal current | - |
| 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 = 0-7 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 = 0-7 steps |
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) |
| MB 2035 | 8205335 | 35 | 88 | - | - | 130 |
| MB 2045 | 8205336 | 45 | 113 | - | - | 130 |
| MB 2060 | 8205337 | 60 | 151 | - | - | 135 |
| MB 2075 | 8205338 | 75 | 188 | - | - | 135 |
| MB 2090 | 8205339 | 90 | 226 | - | - | 140 |
| MB 2105 | 8205341 | 105 | 264 | - | - | 140 |
| MB 2120 | 8205342 | 120 | 301 | - | - | 145 |
| MB 2140 | 8205343 | 140 | 351 | - | - | 145 |
| MB 2150 | 8205344 | 150 | 377 | - | - | 150 |
| MB 4035 | 8205345 | 35 | - | 51 | - | 130 |
| MB 4045 | 8205346 | 45 | - | 65 | - | 130 |
| MB 4060 | 8205347 | 60 | - | 87 | - | 135 |
| MB 4075 | 8205348 | 75 | - | 108 | - | 135 |
| MB 4090 | 8205349 | 90 | - | 130 | - | 140 |
| MB 4105 | 8205351 | 105 | - | 152 | - | 140 |
| MB 4120 | 8205352 | 120 | - | 173 | - | 145 |
| MB 4140 | 8205353 | 140 | - | 202 | - | 145 |
| MB 4150 | 8205354 | 150 | - | 217 | - | 150 |
| MB 6035 | 35 | - | - | 29 | 130 | |
| MB 6045 | 45 | - | - | 38 | 130 | |
| MB 6060 | 60 | - | - | 50 | 135 | |
| MB 6075 | 75 | - | - | 63 | 135 | |
| MB 6090 | 90 | - | - | 75 | 140 | |
| MB 6105 | 105 | - | - | 88 | 140 | |
| MB 6120 | 120 | - | - | 100 | 145 | |
| MB 6140 | 140 | - | - | 117 | 145 | |
| MB 6150 | 150 | - | - | 126 | 150 |
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).