Install Sheet
ZHM-21 // Wireless M-Bus Interface
Document Ref. EPI-086-00
Installation & Safety Notes
➔EpiSensor equipment should be installed, operated, serviced and
maintained only by qualified personnel. EpiSensor does not
assume any responsibility for any consequences arising out of
the use of this equipment.
➔NEVER work alone.
➔Use appropriate personal protective equipment (PPE) and follow
safe electrical work practices.
➔Turn off all power supplying the area in which the device is being
installed before working on it.
➔Always use a properly rated voltage sensing device to confirm
that all power is off.
➔The mains power supply is rated for up to 264 V AC. Consult the
product datasheet for more information on safe operating
conditions.
➔Clearly label the device’s disconnect circuit mechanism and
install it within easy reach of the operator.
➔The fuses / circuit breakers must be rated for the installation
voltage and sized for the available fault current.
HAZARD OF ELECTRIC SHOCK,
EXPLOSION, OR ARC FLASH
Wiring Diagram
Important: Fused
disconnect or circuit
breakers (not
supplied) to protect
0.75mm2 conductor
according to local
electrical
regulations (min.
500mA)
Live
Neutral
Connect to
M-Bus
Supply Voltage: 85 - 264 VAC
Keyhole
Spacing:
122mm
(4.8 inches)
Connect
to Valve
Important: Mains
voltage
See ZHM user manual for
detailed instructions
M-Bus
Valve
