Honeywell SV2 Serie Betriebsanleitungen Seite 3

– Partial blockage of the air intake of the V2MU mixing unit
can potentially influence the air pressure signal to the
valve.
• Proper measures shall be taken to avoid a partial air
intake blockage of the V2MU mixing unit. Inspection
of the V2MU air intake shall be part of the annual
maintenance of the appliance.
Premix Air Pre-Filter
IMPORTANT
– The filter should be mounted as close to the valve
FARMOD as possible.
– Replacement of the filter shall be included in the annual
appliance maintenance procedures.
Fig. 17. Premix installation with valve, mixing unit, pre-filter, heat exchanger and
FARMOD insulation.
Premix Outdoor Air Installations
WARNING
Direct water ingress (e.g. from mist, rain or pressure wash)
into the pulse lines should be avoided or prevented
IMPORTANT:
– When the valve is installed in an area with a temperature
continuously lower than the combustion air intake
temperature, a risk of condensate formation in the air
pulse line is present, which can affect the fuel/air ratio
control, depending on the appliance and permanently
damage the FARMOD and the system.
– In this case it is strongly recommended to install the
Honeywell SV2 Series HEATEXCHANGER-000 kit for a
complete condensation/dehumidification solution to
avoid permanent damage to the FARMOD and the system.
– When using the Honeywell HEATEXCHANGER-000 kit,
the valve + FARMOD may be installed above or below the
mixing unit + Heat Exchanger, but above is preferred.
– If the potential for condensation exists and the full
Honeywell dehumidification system is not used,
Honeywell cannot provide any guidance regarding the
valve/FARMOD position versus the mixing unit as this
configuration has not been designed or tested.
– To prevent condensation formation due to back draft, it is
recommended to purge the application after each burner
operation.
– If there is never a risk of condensation, meaning the
ambient room temperature is above the combustion air
dew point at all times, the complete dehumidification
system is not needed. In this case the valve + FARMOD
can be mounted above or below the mixing unit.
Premix Start-Up
IMPORTANT:
– The FARMOD (Fuel/Air Ratio Module) is standard
equipped with a heating device. The heater will be
powered whenever the valve electronics are powered. The
FARMOD will feel warm after 1 hour of being powered.
This is normal.
– As part of the appliance adjustments during
commissioning, the site-specific calibration of the
SV2 Series valve/appliance should be performed when
the valve/appliance has reached a typical operating
temperature for its installation/application in order to
minimize the impact of component temperature changes
on the fuel/air ratio.
3
SV2 Series Safety Shut-off Valves
32-A00018M-03