FIELD CONTROLS Oil Venting Systems User's Manual
Contents
1. S y Hh M S Uf A The exit termination of a mechanical draft system must not be less than 7 above grade when located adjacent to a public walkway B The venting systems with the exception of direct vent appliances must terminate at least 4 below 4 horizontally or 1 above any door window or gravity air inlet into the building C A venting system must terminate at least 3 above any forced air inlet located within 10 D The bottom of the vent terminal must be located at least 1 above finished grade E The vent termination should not be mounted directly above or within 3 horizontally from an oil tank vent or gas meter not shown in diagram F The vent termination point must not be installed closer than 3 from an inside corner of an L shaped structure G For basement installations where a window well must be used or in installations where the vent terminal cannot be mounted to maintain the minimum 12 clearance above grade use a Field Vent Riser The Vent Riser ensures the vent termination is above grade or the snow line and is in compliance with local codes not shown in diagram 10 or larger should be 10 minimum above public walkway 10 or larger should be 4 above finished grade Clearance to Combustibles If mounting the venting system near combustible materials refer to Diagram A for allowable installation clearances Clearances are bas2. A woe T Venting The Venting Solutions Company for Oil Applications O I LC V E N TASATU DE www fieldcontrols com INSIDE The Evolution of Venting Power Venters Sizing amp Installation Specs Control Kits amp Safety Switches System Setup amp Maintenance Direct Venting May 2008 Field Controls Product Evolution Field Controls has made products for the oil and gas Controls focuses on draft control combustion air and heating markets since 1927 Starting with draft controls power venting products that improve and support oil for large commercial furnaces Field quickly began to and gas burning equipment develop products for the residential market Today Field 1982 The PVO Power Venter The indoor mounted PVO Power Venter provides an economical power venting system for oil appliances All controls are built into these units A Vent Hood is required to terminate the vent system f 1988 The SWG Aluminized Power Venter Combined motor blower and vent hood into one compact easy to install unit Primarily used with gas applications 1993 The SWG Stainless Power Venter Developed for oil applications Designed to withstand New England and Canadian winters 2007 The ComboVent All stainless unit includes combustion air connection and extendable body for walls up to 14 thick Note A separate Gas Venting Guide is available for gas applications For more information on Field Con
3. thick B Combustion air connection included Provides fresh air directly to burner Coupler rotates 360 for easy installation C Two piece backing plate Can be mounted at any point during installation SATE Pez i i A eS Easier to Service Safest way om D Slotted hood with larger screws Saves time during annual service E Quick connect electrical coupling Allows for easy motor access Telescoping stainless steel body Accommodates walls up to 14 thick e A fuel Stainless Steel Sires 6 se Slotted hood with larger screws Quick connect electrical coupling WALL Up to 14 i f s amp 1 i a F q hy i f a z d E a r x F K Combustion air connection included e Coupler rotates 360 for easy installation Specitications and Dimensions Thermal Model Volts Hz Amps Watts RPM Protection wa ns 60 17 138 3000 nee oe E o 13 7 3100 MAT SWG Stainless Power Venter Benefits of the SWG Power Venter include e 100 negative pressure in the vent pipe for maximum safety e Standard galvanized pipe can be used instead of expensive stainless steel e No need to seal vent pipe joints saving time and money Se ROME Phe e Significantly longer vent lengths than positive Sa pressure direct vent systems A Fe 4 safe est way e The SWG is recommended by major heating appliance manufactur
4. Find out the manufacturer s recommended over tire or breeching draft Close the choke plate on the SWG until the draft above the draft control reads approximately 0 04 w c greater than the recommended breeching draft Example If the appliance manufacturer recommends a 0 02 breech draft adjust the choke plate to get an approximate 0 06 draft above the draft control 4 Adjust the barometric draft control to obtain the manufacturer s recommended draft over fire or at the breech The draft control gate should be open approximately half its full swing during normal operation This allows the gate to swing open or closed depending on changes in atmospheric pressure or operating conditions 5 If the proper draft cannot be obtained at the breech or if the gate does not open as described then adjust the choke plate in the SWG to reduce or increase the airflow Re adjust the draft control to obtain the required draft since moving the choke plate will change the system draft Procedure for adjusting the pressure switch e Turn pressure switch adjustment clockwise until the burner quits e Turn counter clockwise slowly until the burner starts e Turn an additional 1 4 to 1 2 turn counter clockwise Note Every installation will require unique pressure switch adjustment Adjustable Venter Ean ilat Choke Paie C Oa Boromeine Draft Cantral ii Gote opens approx 30 ajeran SWG Power Venter FHE Bee Approx 200 F Minimum
5. If the input of the If the calculated equivalent feet is greater than that allowed for appliance is higher than the max allowable for that size Power the venter increase the diameter of the vent pipe to be used and Venter move to the next larger size refer to the table or use the next larger size Power Venter SWG and ComboVent CV Table 1 Sizing The Venter Use Maximum GPH Input A Maximum Equivalent Feet of Vent Pipe VENT INPUT AT MAX AT 60 OF MAX PIPE SIZE 140psi GPH INPUT GPH INPUT 100 s 100 100 100 100 l SWG 4HD 4HDs CV 4 5 100 Select venter according to the actual rated maximum GPH input ComboVent GPH ratings at 100 psi Do not exceed maximum oil GPH input For multiple venting system applications add the input for each Unit sizing may vary depending on specific application Consult your dealer or factory representative for the proper sizing for your particular application 100 100 100 100 100 100 100 100 100 100 100 100 0 T o 100 O0 N N A On NO oe A gt paes A N 2 Ny Ov Co On On On On Oo y e s g On On Oo On On Note In Table 1 the maximum equivalent footage allowable for the vent pipe is given for two points the maximum GPH venting capacity and at 60 of the maximum This allows for estimating values between the two given points Locating The Power Venter Calculating Equivalent Feet of a Vent System Procedure 1 Determine
6. the total equivalent feet for each type of fitting used in the venting system from Table 2 2 Calculate the total feet for the straight lengths of pipe 3 Add the equivalent feet of the fittings to the total amount of feet of straight length pipe This will approximate the total equivalent feet of the vent system Example System Pipe Size 4 Step 1 2 90 Elbows 4 14 Ft Step 2 10 2 Ft Lengths of 4 Pipe 20 Ft Step 3 Total Equivalent Feet 14 Ft 20 Ft 34 Ft Table 2 Vent Pipe Vent Pipe Diameter iis I MZ EC EP Te 19 25 31 38 44 50 56 63 75 89 tbo 51719 1112 14 16 18 21 25 bw 13 a as e 7 els fois Using a Reducer Increaser Small Pipe Size MER ERE Eee ee DEERE eee 2 ERGE Ba a aa fa oo a g E E 7 a FAE aD a AE aidalla dla N y at Lar ge ripe size J 1 Nf A iy To estimate the equivalent foot length of the Reducer Increaser chart find the figure at the intersection of the small pipe size and the large pipe size Terminal Locations of a Vent System Location of the termination of the venting system should comply with the National Fuel Gas Code ANSI Z223 1 manutacturer s recommendations and or applicable local codes See diagram for typical terminal locations S i YY M i Witt V
7. ION COVER RING 2 ADAPTER CLAMP Installs with one hole through the wall e Zero clearance to combustibles e AIR INTAKE e Seamless inner pipe heavy duty clamps and sealant prevent leakage of vent gases e Combustion Air Tee can be rotated within 180 degrees INNER PIPE CLAMP 2 APPLIANCE ADAPTER COVER SLEEVE 2 on SAMPLING PORT INSULATED VENT PIPE EXHAUST COMBUSTION AIR TEE INTAKE ACCESS PANEL 14 FIELDCONTROLS The Venting Solutions Company www tieldcontrols com Field Controls LLC www fieldcontrols com 2630 Airport Road Kinston NC 28504 TEL 252 522 3031 FAX 252 522 0214 2008 Field Controls form 4318 Printed in U S A CP08
8. calls for heat starting venter motor 2 Atter the venter motor has come up to speed the pressure switch closes This closes the circuit to the burner and allows the burner to operate This occurs in approximately 1 to 2 seconds 3 After the heating requirement is satisfied the thermostat circuit opens and deactivates the burner and power venter circuit 4 Oil venting systems require a post purge device During the post purge cycle the venter operates for a period after the burner has shut off This is to purge the remaining flue gases and to cool the combustion chamber Typical post purge times are 3 to 5 minutes Longer purge times may be required depending on system installation as SWG Super Lube ANNUAL MAINTENANCE e Oil motor and fan shaft with SWG Super Lube annually e Works in conditions of 40 to 300 F 1 Motor Inspect the motor once a year it should rotate freely To prolong the life of the motor lubricate with six drops of SWG Super Lube Part 46226200 annually Use of any other type of lubricant may cause premature motor failure e Synthetic lubricant which maintains specified viscosity 2 Wheel Inspect the venter wheel annually to clear any soot ae e Use of any other lubricant ay ash or coating which inhibits either rotation or air flow cause premature failure Remove all foreign materials before operating 3 Vent System Inspect all vent connections annually for looseness for evidence of corrosi
9. ed on an installation using single wall galvanized steel vent pipe If manutactured double wall vent pipe is required or used for the installation clearance should be based on the vent pipe s rated clearance Always check local code requirements for code restrictions Routing of the vent system and clearances for the vent pipe may be planned once the termination location is determined Route the vent pipe from the appliance to the venter using as few elbows as possible The horizontal section of the vent pipe should have a slight upward slope from the appliance to the venter The vent pipe size diameter can be smaller than a typical chimney vented system and still overcome the higher pressure losses because the power venter mechanically creates the required draft or air flow to vent the system Single Pipe System For estimating the minimum vent pipe diameter for an oil system multiply GPH by 140 000 BTU GAL then divide by 12 600 BTU sgq in This will give the minimum cross sectional area required See Table 3 for area to diameter conversion For multiple equipment venting systems divide the total BTU hr input for all appliances by 9 300 BTU sq in This will give you the minimum vent pipe diameter needed for the common breaching of the vent system As a rule of thumb size the vent pipe to the outlet diameter of the heating equipment for a single appliance venting system For multiple appliance venting systems use the outle
10. ers The SWG must be sized to match the appliance or appliances input firing rate Most firing rates are published in the manutacturer s installation Note SWG 4HD 5 amp 6 Motor Kits include a stainless steel manual SWGs must be installed with a CK blower wheel for better performance and extended life Control Kit to ensure proper listing and sate efficient venting Replacement Motor Kit and Stainless Steel Model shown WALL 0 Yo PN XXNX 0 64 XXIX OXX RY XXIX PY i a eo Specifications and Dimensions Model D A B C D 10 B NOTE Control Kits are required for operation of the SWG s Designates stainless steel model recommended for oil applications Sizing The Power Venter Size the Power Venter based on the input firing rate of the Do not select a venter with a maximum GPH lower than the appliance If the power venter is being used to vent multiple appliance The equivalent feet of vent pipe for the installation appliances add the input firing rates for each appliance and must be calculated Based on the vent pipe diameter to be used use that total to size the venter Knowing the total input GPH for compare the calculated equivalent feet of vent pipe with the oil the venter can be sized from Table 1 Select the venter rated maximum equivalent feet allowable for the venter see Table 1 closest to the total input GPH for installation
11. fo 550 F Maximum inlet i temperature Approx 0 04 WC Diferentiol Moximum efficiency at zero imak above finished grade Toetie Dro SANS N WEN Figure 12 System Setup and Maintenance 6 Once proper draft is achieved measure CO2 and smoke level If necessary adjust the intake airflow at the burner to obtain the highest possible CO2 reading with a zero smoke reading As the intake airflow is increased or decreased the draft may change Repeat steps 3 through 6 to re adjust the draft control and choke plate before attempting any other adjustments 7 Measure combustion efficiency and exhaust gas temperature at the venter inlet Combustion efficiency should be adjusted to maximum attainable at zero smoke Exhaust gas temperature at the venter inlet should range between 200 F and 550 F 8 If maximum efficiency and zero smoke yields a temperature below 200 F at the inlet to the venter the following suggestions must be considered A Use a larger oil nozzle or higher oil pump pressure to raise the firing rate of the burner Repeat steps 3 through 7 until all combustion parameters are within the specified ranges B Reduce the length of the duct from the appliance to the venter which will increase the venter inlet temperature C Insulate the vent pipe to minimize heat loss D Seal the vent pipe joints to reduce uncontrolled dilution air TESTING 1 The thermostat wall thermostat or aquastat
12. g combustion air to the burner Vent Gases Out Combustion Air Direct Oil Burner A S Venting Combustion Air Provides fresh air for combustion while exhausting combustion gases through one hole in sidewall Power Venting In the early 1980 s Field Controls introduced the PVO power venter It was an indoor mounted power venter connected to the outside wall via a vent hood The PVE PVO and PVG series venters are still popular and in use today In 1988 Field introduced and patented the outdoor mounted SWG power venter It combined the motor blower and vent hood in one convenient package The double wall pipe allows for near zero clearance to combustibles The SWG is available aluminized for gas applications and stainless steel for oil use In 2007 The tan is a part of the furnace and forces Eed anion auaa ine Comboer Pover Venter combustion gases out the sidewall via double walled sealed pipe Combustion air is pulled into the The ComboVent is all stainless and includes a structure simultaneously combustion air connection and an extendable body for walls up to 14 inches thick Gases Out Oil Burner ComboVent Combustion Air Power Venting Combined Introducing the most versatile easiest to install easiest to service all inclusive combustion air vent system ever made A total system for combustion air and venting A Telescoping stainless steel body Accommodates walls up to 14
13. omes without chimneys Today many homeowners are converting their heat from electric to gas or oil In these cases the contractor is faced with a challenge of venting the equipment Choices include constructing a chimney or mechanically venting through the sidewall Sidewall venting is much less expensive easier and faster Power Venting NWI NAN WW NWN VV KAAI N Vent Gases Out Oil Burner A S Mechanically pulls gases through the sidewall saving the cost and space required for a chimney Deteriorating Chimneys Another factor contributing to the use and growth of power venting has been the deteriorating chimney Oil and gas combustion generate acid rich gas that can eventually destroy a clay or masonry chimney A deteriorating chimney can be relined with metal duct but even metal duct is subject to rust and corrosion due to the destructive nature of the acid and condensation Sidewall venting is safer and less expensive than relining a chimney The Evolution of Venting Direct Venting Power Venting In response to the growing use of direct vent burners Field with Combustion Air Controls developed the Field Direct Venting System in 2005 The FDVS is included as part of the original equipment on many popular brands of furnaces and Saeed d boilers and is not yet available through wholesale distributors The FDVS includes a double wall system that simultaneously vents combustion gases while bringin
14. on and for flue gas leakage Replace seal or tighten pipe connections if necessary Check the venter choke plate to ensure it is secured in place Check the barometric draft control to ensure the gate swings freely 4 System Safety Devices With the heating system operating disconnect the pressure sensing tube from the pressure switch on the CK Kit This should stop the burner operation Re connecting the tube should relight the burner 13 FieldDirect Venting System Benefits of FieldDirect Venting System e No adverse reactions to direct wind loads up to 50mph e Burner efficiency actually improves under direct wind load e Decreased chance of exhaust gases recirculating into the structure e Virtually impossible for snow to block the air intake e Stainless 316 construction e Inner pipe is angled to drain condensation outside e Stainless seam welded inner pipe reduces potential of corrosion and leakage e Exhaust angle reduces migration e Nozzle configuration accelerates combustion gases l l away from the structure Patent Pending Design How FieldDirect Venting Systems Work Allows combustion air to enter from the top of the unit Fresh Air In Combustion gases are accelerated at the nozzle and exit the structure at an optimal angle Combustion S i Air Vent Gases Out Combustion Gases Out Installation Advantages of FieldDirect Venting System TERMINATION INNER PIPE VENT TERMINAT
15. s Electronic post purge is included shown with cover off CK kits can be mounted up PPC 4 Post Purge to 100 feet from venter Thermal Safety Switch Our thermal safety switches efficiently detect flue gas spillage due to a blocked flue continuous down drafting or inadequate draft condition With the safety switch wired in series with the burner circuit the switch will de energize the system s burner or burner control once it senses the spillage of hot flue gases It will not allow the burner to restart until the switch has been manually reset Contact Load Rating Load Rating Material Amps Volts Normally Closed Switch Switch Type Application Model Part No Manual reset Designed for use with power 46086900 Silver 10 Amps 120 AC 200 F M SPDT venting and chimney vented systems for oil fired applications 11 System Setup SYSTEM SETUP Figure 1 shows a typical oil fired appliance and the expected ranges of several readings taken at various locations in the system Note If a vent pipe reducer is required use a smooth walled gradual reducer Place it at the venter inlet as shown in Figure 1 1 Set the choke plate in the power venter or extension kit to its full open position Set the draft control adjustment weight to its midpoint position 2 Adjust the thermostat so that the unit will run continuously Allow the unit to operate for 5 to 10 minutes to ensure stack temperature stabilization 3
16. t diameter of the largest unit and add 50 SQUARE HOLE THROUGH WALL METAL LINING FOR A 550 F 400 F INPUT TEMP Allowable Inlet Temperature Clearance B 00 F or Les 550 F or Les 550 F or Les Double Pipe System Allowable Inlet Temperature Clearance A 40 F or Les 550 F or Les 550 F or Les With galvanized sheet metal liner or equivalent COMBUSTIBLE MATERIAL INPUT TEMP LOCATION Table 3 Nominal COMBUSTIBLE fe MATERIAL FLOOR JOIST 7 SWG SERIES Pipe Size Cross Sectional Area AB cen we POWER VENTER Sq Inches el _ WAR B LOCATION I aR J OUTER PIPE E EXTENSION a TOOK END PIPE COVER FOUNDATION FROM SWG UNIT B VENT or L VENT ELBOW 10 Control Kits Control Kits Control Kits CK control the operation of Power Venters See the chart below to select the proper kit for your application Control Ki 7 Adjustable Electronic Post Purge Applications All oil fired systems Has adjustable electronic post purge All oil fired systems Has thermally activated post purge All oil fired systems May require optional delay oil valve for simultaneous burner operation Ps sts RJR 6 120V Relay Control Kits are ETL approved accessories when used in conjunction with the SWG and ComboVent Power Venters Control Kit Installation CK 63 remote mounted For use with 120 VAC oil fired system
17. trols products wiring diagrams and installation manuals visit www fieldcontrols com or call 252 522 3031 The Evolution of Venting As long as people have used fire to heat it has been necessary to vent the smoke and combustion gases from the dwelling Since heat rises the natural solution was to allow the gases to vent through the roof via a hole or chimney For centuries this natural draft style of venting has been the accepted standard for venting stoves furnaces and boilers Whether fired by wood coal oil or gas this system worked well and when possible is still used today Energy Efficiency and Tighter Homes In the late 1970 s and early 80 s energy efficiency became a top priority in America resulting in tighter homes and more efficient heating equipment Tight Conventional Venting Oil Burner A S Hot air rises As long as a chimney exists it is in good condition and the combustion gases are warm enough to rise naturally this method can be effective and safe homes restrict the infiltration of outside air which also restricts natural draft Higher efficiency furnaces generate cooler exhaust gases which are more difficult to exhaust naturally as well These factors led to the development of a mechanical method of venting to properly remove combustion gases from the dwelling Homes without Chimneys Electric heat grew in popularity through the 1960 s and 70 s resulting in the construction of h
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