Introduction
This manual describes how to understand, install and wire
the MFH 230 Control Module. MFH 230 is pre-congured
to automatically re the boiler(s) only when one or more
time/temperature zone controls call for heat, eliminating
the need for a separate boiler clock and so prevents
boiler dry-cycling.
IMPORTANT:
ONLY use 0.5 mm2to 1.5 mm2 wiring cable when connecting to the
MFH 230
unit.
Wiring external to the printed circuit board MUST be in accordance with
current statutory wiring regulations and any local regulations that apply.
The power supply must be 230 V~, 50/60 Hz, Single Phase. Attaching the
MFH 230 board to more than one phase will cause irreparable damage.
To ensure single phase, we recommend that power be introduced only
at the mains input terminals (7, 8) and that all other mains inputs be
derived from suitable outputs on the board itself.
Devices attached to MFH 230 MUST be properly earthed in accordance
with manufacturer’s specications. The method of connection to the
mains electricity supply MUST facilitate complete electrical isolation of
the entire installation.
A fused double pole switch, with at least 3 mm (1/8”) contact separation
in both poles, serving only the MFH 230 panel should be used. The point
of connection to the mains should be readily accessible and, if possible,
adjacent to the MFH 230 unit.
WARNING & INFORMATION SYMBOLS
The addition of this symbol to a “Danger” or “Warning” safety label
indicates that an electrical hazard exists which will result in personal
injury if the instructions are not followed. Obey all safety messages that
follow this symbol to avoid possible injury or death.
The Information symbol is used to address practices not related to
physical injury and to indicate where useful facts will assist in installing
or using the device correctly.
CAUTION indicates a hazardous situation which, if not avoided, could
result in minor or moderate injury.
DANGER indicates a hazardous situation which, if not avoided, will result
in death or serious injury.
IMPORTANT! Disregard will lead to permanent equipment damage!
INFORMATION! indicates an explanation containing information that is
useful to know, a supplementary operating procedure, or other data.
IMPORTANT INFORMATION
