For The Electrician; Electrical Connections - Baxi Bioflo Installation & Servicing Instructions Manual

For the Electrician

3.1

Electrical connections

The pellet flue-connected boiler and related accessories are designed to be installed only in dry areas (protec-
tion type IP 10).
Installation of electrical components may only be performed by a qualified technician. The regulations and spec-
ifications of ÖVE, VDI, SEV and local ordinances must be followed.
– 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. protection switches are considered all-pole disconnections (ÖVE regulation).
The boiler is pre-wired and internally fused with a T 6.3 A fine-wire fuse to protect against short circuit. If an MES
module is ordered (including boiler sensor), this will be installed in FireWIN and electrically wired at the factory. When
there are several MES modules, they are all installed in the wall-mount casing to facilitate operation:
Maximum MES module switching capacity:
WVF and solar modules with X1/X2 contact:
Be sure to note the separate wiring of the extra-low voltage line (sensor) and low-voltage line
(230 VAC)!
The electrical power consumed depends on whether a fully automated pellet feed (suction turbine) is connect-
ed, and on the number of actuators supplied (pumps, mixing valves, etc.).
In areas with increased power surge risk (e.g., lightning strikes in regions prone to storms), we recommend
installation of an appropriate surge protector.
Electrical connection of the FireWIN pellet flue-connected
boiler:
with fine-wire PVC sheathed cables, e.g. H05VV-F (YMM-J)
Electrical connections of the suction turbine:
Note: Each cable must be routed separately together with the deliv-
ery and return air hose. The cables can be routed together with the
hoses through the fire protection collars to the suction turbine or to
the changeover unit.
Connection of FireWIN pellet flue-connected boiler to the suction tur-
bine:
Two separate cables (5 and 8-core) are required –
this is a requirement of the guarantee conditions!
The cable cross-section must be selected according to the length
of the electric cables so that the suction turbine always has a sta-
ble voltage supply (min. 220 VAC under load).
Recommended accessory:
Ribbon cable 5 x 2.5 mm
Note: The 8-core cable must be connected in the suction turbine,
because this also carries the LON bus and is required for service
work.
Connection of suction turbine to the changeover unit:
Two separate cables (3 and 4-core) are required –
this is a requirement of the guarantee conditions!
Cable for limit switch (extra-low voltage): min. 3 x 0.5 mm
earthed)
Cable for changeover unit motor (low voltage): 4 x 1.5 mm
Relay outputs: 230 VAC, 6 A (2 A inductive), 50 Hz
Solid-state relay: 230 VAC, 1 A
2 2
and 8 x 1 mm (FIRE 042 or FIRE 043).
2
(not
2
Fig. 44
33
1 FireWIN pellet flue-
connected boiler
2 Suction turbine
3 Changeover unit
1
230 VAC
2
8 x 1 mm
2
5 x 2,5 mm
3
2
min. 3 x 0,5 mm
2
4 x 1,5 mm
2