Honeywell SV2 Series User manual

32-00180-01
SV2 Series Valves Premix Accessories
HEAT EXCHANGER-000
FARMODFILTER-000
FARMODINSULATE-000
V2MUTUBEXX-000
V2MUFITXXXXX-000
INSTALLATION INSTRUCTIONS
INTRODUCTION
This document provides installation instructions and tubing
connection information for the Honeywell SV2 Series valves
Heat Exchanger, air pre-filter, FARMOD insulation shoe, fitting
and tubing kits for use with premix valves.
Other applicable publications are:
– 32-00018, SV2 Series Installation Instructions
– 32-00029, SV2 Series User Manual
– 32-00044, V2MU Installation Instructions
SPECIFICATIONS
Heat Exchanger Kit Contents:
Heat Exchanger, 1 pulse line insulation sleeve (1 m/39.4 in
each), sealing nut + washer for mounting to V2MU mixing
unit, (4) M4 x 54 screws, FARMOD (Fuel/Air Ratio Module)
insulating shoe and (4) 4.3 x 8 x 11 spacers.
NOTE: Fittings and tubing must be ordered separately due
to the variety of possible appliance configurations.
Preferred Pulse Line Materials and Dimensions
–Air and Gas pressure line: Polyurethane
–Dimensions: 6mm ID / 8mm OD
–Fittings should not restrict the inner pulse line diameter
–Reference pressure line: Aluminum or Stainless steel
Air Pre-Filter Kit Contents:
–Air Pre-Filter
NOTE: Fittings and tubing must be ordered separately due
to the variety of possible appliance configurations.
The customer must furnish an appropriate filter
mounting bracket for their chosen location.
Accessory Kits:
Tubing kit part numbers:
Plastic V2MUTUBEPL-000
Metal V2MUTUBEAL-000 (1000mm/39.4 in long)
Fitting kit part numbers for plastic tubing:
Straight V2MUFITPLSTR-000
90 Degree Swivel V2MUFITPL90D-000
Tee Swivel V2MUFITPLTEE-000
Fitting kit part numbers for metal tubing:
Straight V2MUFITMESTR-000
90 Degree Swivel V2MUFITME90D-000
NOTE: Metal (aluminum) pulse line kits come with straight
tubing that can be formed to specific application
needs by the customer.
INSTALLATION
When Installing These Products…
1. Read these instructions and the appropriate product
literature carefully. Failure to follow them could damage
the product or cause a hazardous condition.
2. Installer must be a trained, experienced combustion
service technician.
3. Check the ratings on the product to make sure the product
is suitable for your application
4. After installation is complete, carry out a thorough
checkout of product operation as laid out in this
document and documents 32-00018 (SV2 Series safety
shut-off valve Installation Instructions) and 32-00040
(FARMOD Installation Instructions).
INSTALLATION CONSIDERATIONS
Pulse Line Assembly
IMPORTANT:
• The Fuel/Air Ratio Module operates properly only if the pulse
line fittings are properly tightened and the flow through the
pulse lines is un-obstructed.
–Proper measures shall be taken to ensure the pulse lines
are not twisted or kinked during connection or that they
can be unintentionally kinked after the installation has
been taken into operation.

SV2 SERIES VALVES PREMIX ACCESSORIES
32-00180—01 2
–Protect pulse lines against damage and keep the lines free
from any contact to potential vibrating surfaces.
• In all cases, avoid creating a siphon-like shape.
• A wide variety of pulse line slopes and shapes may be
needed to fit into a particular appliance; best engineering
practice would be ‘1/2 bubble’ on a level (¼ inch of drop per
1 foot of run or about 6mm drop per 0.31m of run). However,
practical limitations may require some deviation from it.
Please consult Honeywell Thermal Solutions with your
particular geometrical arrangement if at doubt.
Fig. 1. V2MU mixing unit pulse line connections.
• (Refer to Fig. 1) To avoid condensate from back draft
entering any pulse line of the Fuel/Air Ratio Module,
downwards pointing pressure ports 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 the (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.
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 is designed
to remove fine dust particles from the air stream to the valve
FARMOD, which can collect at the internal FARMOD orifice
entrances, affecting flow resistance to the internal sensors
and eventually cause nuisance lockouts.
The filter must be mounted between the V2MU mixing unit
and the valve FARMOD in the air pulse line. When the Heat
Exchanger is used, it must also be mounted between the
V2MU mixing unit and the valve FARMOD, with the Heat
Exchanger first and the filter second.
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. 2. Pre-Filter installation.
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 SV2 Series Heat Exchanger kit is not needed.
In this case the valve + FARMOD can be mounted above or
below the mixing unit.
NOTE: The Heat Exchanger and the filter must be mounted
between the V2MU mixing unit and the FARMOD,
with the Heat Exchanger first and the filter mounted
as close to the FARMOD as possible
INSTALLATION SEQUENCE
WARNING
Explosion or Fire Hazard Can cause severe injury,
death, or property damage.

3 32-00180—01
SV2 SERIES VALVES PREMIX ACCESSORIES
• Turn off gas supply before starting installation.
• Disconnect power supplies before beginning installation.
• More than one disconnect can be involved.
The heat exchanger can be directly mounted to the V2MU
mixing unit as shown in Fig. 3-Fig. 4 and can be mounted
in either a vertical or horizontal position, depending on the
appliance configuration and available space.
For remote mounting the heat exchanger, the customer must
provide the appropriate bracket and/or install and connect as
part of their appliance offering. Pulse line tubing and fitting
between the mixer and heat exchanger is then required.
The inner diameter of the connection between the heat
exchanger and the mixer shall not be smaller than 9mm at
any point.
NOTE: The Heat Exchanger must always be mounted in
a position that allows condensate to drain to the
mixing unit. Accordingly, ensure that the mixer
connection on the heat exchanger is the lowest
point in regards to the heat exchanger mounting,
otherwise water will be trapped inside the heat
exchanger and will not drain appropriately.
Fig. 3. Heat exchanger mounting example with horizontal
mixing unit orientation (shown with 300kW Mixing Unit).
Fig. 4. Heat exchanger mounting example with vertical
mixing unit orientation (shown with 300kW Mixing Unit)
IMPORTANT:
• The SV2 series premix valve and its accessories have
been developed to provide an optimum fuel-air ratio
performance.
• Honeywell cannot guarantee the valve or mixer
performance, operation, efficiency or reliability if any non-
Honeywell accessories are used with the SV2 Series premix
platform.
• When mounting the heat exchanger vertically, orient its
port C connection facing upwards so that the condensate
from the FARMOD drains through the heat exchanger and
into the mixing unit. Refer to Fig. 2-Fig. 4.
Excessive moisture can partially or fully clog the pulse lines
between the mixing unit and the FARMOD and damage the
FARMOD. In this case, the system will fail safely by causing
a flame out, a valve lockout and/or may render the FARMOD
unusable. Note that the FARMOD is field replaceable should
this last instance occur.
A. FARMOD Insulation Installation
1. Take care that dirt does not enter the gas valve or pulse
lines during handling.
2. Remove the original four (4) torx screws as shown in
Fig. 5 and completely remove the Fuel Air Ratio Module
from the valve body.
Fig. 5. FARMOD pulse line connections/mounting.
3. Place the FARMOD into the insulation shoe and thread
the long screws provided with the kit through the
combination. Refer to Fig. 6.
Fig. 6. FARMOD with insulation shoe.

® U.S. Registered Trademark.
© 2018 Honeywell International Inc.
32-00180—01 M.S. 11-18
Printed in U.S.A.
For More Information
The Honeywell Thermal Solutions family of products includes Honeywell
Combustion Safety, Eclipse, Exothermics, Hauck, Kromschröder and Maxon. To
learn more about our products, visit ThermalSolutions.honeywell.com or contact
your Honeywell Sales Engineer.
Honeywell Process Solutions
Honeywell Thermal Solutions (HTS)
1250 West Sam Houston Parkway
South Houston, TX 77042
ThermalSolutions.honeywell.com
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
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.
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.