Wiring - Viessmann VITOCAL 100-AW Installation, Service And Operating Instruction

Vitocal 100-AW AM2V Installation, Service and Operating
Maintenance
Repairs to parts that operate in a combustible atmosphere
H Unless it can be established that the permissible voltage and current values will not be
exceeded, no capacitive or inductive loads must be connected to the device.
H Only those components that meet the requirements for operation in a flammable atmosphere
may be connected to voltage in a flammable atmosphere.
H Use only original spare parts or parts approved by the Viessmann. In the event of a leak, all
other parts may ignite the refrigerant.

Wiring

H Check that the wiring is not exposed to wear, corrosion, stretching, vibration or any adverse
environmental conditions and that it is not located near sharp edges.
H When inspecting, also consider the effects of ageing and the effects of continuous vibration
on the compressors and fans.
Refrigerant detectors
H Under no circumstances use ignition sources to detect the refrigerant and refrigerant leaks.
H No flame detectors may be used to detect leaks.
Leak detection
The methods described below are suitable for detecting leaks in systems filled with a flammable refriger-
ant: Leak detection with electronic refrigerant detectors:
H Electronic leak detectors may not be adequately sensitive or need to be calibrated for a
specific detection range. Calibrate the detector in a refrigerant-free environment.
H The refrigerant detector must be suitable for detecting R32.
H The refrigerant detector must contain no potential ignition sources.
H Calibrate the refrigerant detector for the refrigerant used. Set the trip threshold < 3 g/a,
which is suitable for R32. Leak detection using leak detection fluids, Leak detection fluids
are suitable for most of refrigerants.
Note:
Chlorine-containing leak detection fluids may react with the refrigerant.
As a result, rust may form.
Do not use any leak detection fluids that contain chlorine.
Procedure when leaks are found in the refrigeration circuit:
H Immediately extinguish any fire in the vicinity of the heat pump.
H Do not solder leaks on the refrigeration circuit.
Refrigerant suction and evacuation
Perform the steps described in the "Refrigerant suction" section.
Perform the steps described in the "Vacuum generation in refrigerant lines and indoor unit"
section.
Refrigerant filling
Follow the steps described in the "Filling the refrigerant lines and indoor unit" section.
Marking (inscriptions on the heat pump)
A plate with the date and signature and the following information must be placed in a clearly visible posi-
tion on the heat pump which has been decommissioned:
H Flammable refrigerant
H Installation is not working.
H Refrigerant has been removed.
Service
71