Honeywell SV2 Serie Installationsanleitung Seite 3

IMPORTANT (Refer to Fig. 2)
• To avoid condensate from a backdraft entering any pulse
line of the Fuel/Air Ratio Module, downwards pointing
pressure tabs on the V2MU mixing unit or any other device
shall not be used.
• 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.
NOTE: If the appliance is equipped with a sealed air chamber
and the SV2 Series valve with FARMOD (Fuel/Air
Ratio Module) is contained in the sealed chamber, it is
allowed to not use the air pressure pulse line.
Air Pre-Filter
The air pre-filter is included with every premix valve and is
available as a field replacement part as well. The air pre-filter
MUST be installed in every premix system, regardless of
whether the Heat Exchanger is used.
The filter must be mounted between the V2MU mixing unit
and the valve FARMOD in the air pulse line.
NOTES:
– Due to the variety of possible appliance configurations, the
fittings and tubing must be ordered separately.
– The customer must furnish an appropriate filter mounting
bracket for their chosen location.
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.
SV2 SERIES VALVES MIXING UNITS INSTALLATION INSTRUCTIONS
Fig. 3. Pre-Filter installation.
Outdoor Air Installations
WARNING
Direct water ingress (from mist, rain, or pressure wash,
for example) 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 because this configuration
has not been designed or tested.
• To prevent condensation formation due to backdraft, 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 SV2 Series Heat Exchanger kit is not necessary.
In this case the valve + FARMOD can be mounted above or
below the mixing unit.
3 32-00044EFSPIGDC—05