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3.
For the Electrician
3. For the Electrician
3.1 Electrical connections
The boiler and related accessories are designed to be installed only in dry areas (protection type IP 10). Installa-
tion of electrical components may only be performed by a qualified technician. The regulations and specifications
of ÖVE, VDI, SEV and local ordinances must be followed.
Attention!
– The mains connection must be protected against short circuit with a 13 A delayed-action fuse.
– On site, the technician must install an all-pole disconnection with at least 3 mm contact gap at
the mains access point. Current-operated r.c.d. or frequency conversion protection switches
are considered all-pole disconnections (ÖVE regulation).
We recommend using fine-wire PVC sheathed cables, e.g., H05VV-F (YMM-J) with a 3 x 1.5 mm
2
nominal crosssection.
Two separate cables are required for connecting the changeover unit (located in the pellet store).
– Cable for limit switch (extra-low voltage): min. 3 x 0.5 mm
2
(no earth), we recommend using a shielded cable if
the cable is longer than 5 m.
– Cable for changeover unit motor (low voltage): 4 x 1.5 mm
2
The boiler is pre-wired and internally fused with a T 6.3 A fine-wire fuse to protect against short circuit. By special
order, up to 3 MESplus modules (including boiler sensor) will be installed in the control panel and wired at the
factory – Fig. 67. if there are more than 3 modules, they are installed in the wall-mount casing (accessory: MES
004) and need to be electrically wired on site.
Maximum MESplus module switching capacity: Relay outputs: 230 V AC, 6 A (2 A inductive), 50 Hz
WVF and B-PLM modules with X1/X2 contact:
Solid-state relay: 230 V AC, 1 A
The electrical rating is dependent upon the number of modules installed in the unit, that is, the number of actua-
tors powered (pumps, mixing valves, etc.).
In areas with increased power surge risk (e.g., lightning strikes in regions prone to storms), we recommend ins-
tallation of an appropriate surge protector.
Fig. 67 Control panel BioWIN 100–260
Information!
Electrical cables must not touch heating and exhaust pipes, nor must they come in contact with no-
ninsulated boiler components. They are to be sufficiently braced and provided with a protective tube.
All electrical connections are located in the control panel. The
control panel
is set up on
2 levels
(control panel
top part and control panel bottom part). The control panel top part contains the BioWIN main board while the
control panel bottom part contains the connection terminals (screwless spring-type terminals) for connecting the
MESplus control.
Fuse T 6.3 A
MESplus module
Control panel