Honeywell SV2 Series Installation Instructions page 4

4. Inspect/clean the sealing and mating surfaces.
5. Attach the combination to the valve body using the (4)
M4 x 54 screws and (4) 4.3 x 8 x 11 spacers provided.
Verify the insulated FARMOD is flush against the valve
casting. The maximum tightening torque is 2 ± 0.2 Nm
(18 ± 2 in-lbf).
B. Heat Exchanger Mounting
1. Remove the selected mixing unit port "C" plug. Refer to
the Installation Considerations section for appropriate
mounting location selection.
2. Mount the Heat Exchanger to one of the V2MU mixing
unit "C" ports using the included union nut and washer.
Refer to Fig. 3, Fig. 4, and Fig. 7. The recommended
tightening torque is 1.5Nm (13.3 in-lbf). Ensure the seal
is in place.
Fig. 7. Heat Exchanger mounting hardware.
NOTE: DO NOT connect the Heat Exchanger to a
downwards pointing port C on the Mixing Unit!
Refer to Fig. 1.
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3. Use the tubing and fittings (purchased as separate kits)
to connect the Heat Exchanger to the pre-filter "In" port
(see section C).
4. Attach the 2 remaining pulse lines to the FARMOD ports
A (gas) and port B (reference), following the instructions
of the burner or boiler manufacturer. Refer to Fig. 5.
Attach each pulse line to its corresponding fitting on the
mixing unit or burner to the FARMOD.
5.
Use the pulse line insulation sleeve included with the
Heat Exchanger kit to insulate the air feedback line(s) for
the system.
C. Air Pre-Filter Mounting
1. Select the appropriate mounting location, as close to the
FARMOD as possible.
NOTE: The customer must furnish an appropriate
mounting bracket for their chosen location.
2. Use the tubing and fittings (purchased as separate kits)
to connect the pre-filter "Out" port to the valve FARMOD
port C (air). Refer to Fig. 2 and Fig. 5.
3.
If using the Heat Exchanger, use the pulse line insulation
sleeve included with the Heat Exchanger kit to insulate
the air feedback line(s) for the system.
IMPORTANT:
• Replacement of the filter shall be included in the annual
appliance maintenance procedures.
• The FARMOD 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.
For more information on this product and the
entire SV2 Series product line, please refer
to the SV2 Series User Guide located on our
website at https://combustion.honeywell.
com/sv2
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