background image

 

Series-LA/LX/LXR 

                     Page 20                        

6/15/2010 

Venting / Combustion Air Ducting 

General Requirements 

 

Refer to the 

National Fuel Gas Code,

 ANSI Z223.1 (NFPA 54) in the US and CAN/CGA B149.1 

and B149.2  

Installation Codes

 in Canada, as well as all local requirements for general venting 

guidance. 

 

Series LA/LX/LXR Infrared Heaters may be installed vented or unvented. 

 

Series LA/LX/LXR Infrared Heaters may be vented horizontally or vertically using conventional 
venting materials. 

 

If heater is to be vented horizontally, the vent from building must: 

o

 

Be not less than seven feet above grade when located adjacent to public walkways. 

o

 

Terminate at least three feet above any forced air inlet located within ten feet. 

o

 

Terminate at least four feet below, four feet horizontally from or one foot above any door, 
window, or gravity inlet into any building. 

o

 

Be located at least 12" inches from any opening through which vent gases could enter a 
building. 

o

 

Be beyond any combustible overhang. 

o

 

Be installed at a height sufficient to prevent blockage by snow. 

 

Optional outside air supply may be directed to the heater horizontally or vertically. 

 
 

Important 

Maximum total vent length allowed for any model heater is 30' 
feet. 

Maximum total fresh air inlet duct length allowed for any 
model heater is 30

'

 feet. 

Total of vent length plus outside air supply duct length cannot 
exceed 50

'

 feet for any heater with maximum heat exchanger 

length. 

If condensation outside the vent pipe duct is a problem, then 
make provisions for removal or containment. 

Note:

  The above stated requirements assume a maximum of 2 

elbows in the total combination of vent and air supply duct.  
Subtract 5

'

 feet of allowable length for each elbow if 3 or more 

elbows are used. Do not use flexible duct for fresh air supply 
duct. 

 
 

Un-Vented Operation 

 

In general, where heaters are installed without direct outside combustion air, fresh air ventilation 
must be provided to the building space (4 cfm per 1000 BTU/Hr in USA, 3 cfm per 1000 BTU/Hr 
in Canada).  Verify applicable codes. 

 

Optional outside air supply is not recommended for unvented heaters due to possible pressure 
imbalances in the building space. 

 

Ensure that minimum combustible clearances are maintained for unvented heaters.  Refer to Table 
2, for required clearance dimensions. 

Summary of Contents for LA series

Page 1: ...reek Ontario L8E 3N9 www superiorradiant com If you smell gas 1 Open windows 2 Don t touch electrical switches 3 Extinguish any open flame 4 Immediately call your gas supplier Il est interdit d utilis...

Page 2: ...ON FIRE OR EXPLOSION HAZARD This heater is equipped with an automatic ignition device Do not attempt to light the burner by hand Failure to comply could result in a serious fire and personal injury ha...

Page 3: ...STIBLES 6 Clearance to Combustibles Materials 7 INSTALLATION DETAIL 8 Installation Sequence 11 VENTING COMBUSTION AIR DUCTING 20 General Requirements 20 Un Vented Operation 20 Vented Operation 21 Hori...

Page 4: ...expertise in a cost effective unitary heater design as culmination of that commitment Series LA LX LXR models are field assembled low intensity infrared heaters that are easy to install and maintain a...

Page 5: ...th all local requirements Venting Refer to the National Fuel Gas Code ANSI Z223 1 NFPA 54 in the US and CAN CGA B149 1 and B149 2 Installation Codes in Canada for proper location sizing and installati...

Page 6: ...nsional Information Figure 2 Component Dimensional Information 14 44 12 12 9 15 16 6 10 4 10 24 18 U BEND 24 18 ELBOW 16 WHEN INSTALLING ORIENT BAND CLAMP LOCK BOLTS TO TOP AT 10 O CLOCK OR 2 O CLOCK...

Page 7: ...ction of Baffle See Figure 5 for installation details In the case of a 100 000 BTU system place 4 sections of baffle in the end of each of the last 3 10 sections of tube See Figure 6 for installation...

Page 8: ...ension shields standard U tube mounting and opposite 45 U tube reflector mounting Bottom shields are also approved The below clearance dimension for the horizontal configuration dimension C in Table 2...

Page 9: ...8 3 3 18 18 3 3 18 18 4 3 20 20 One Side Extension D A C B A B C D 2 2 35 6 2 2 35 6 2 2 35 6 2 3 36 6 Two Side Extension D A B C A B C D 2 2 38 2 2 2 38 2 2 2 38 2 2 3 38 3 U Tube Horizontal D A B C...

Page 10: ...relationship Figure 4 Installation Configurations for 40 000 60 000 BTUH Model LA LX LXR 60 000 BTU 30 Long For 40 and 50 Heaters follow the same sequence The 12 baffle is Installed in the last sectio...

Page 11: ...or End Cap Loose Screws Install J Bolt at first hanger Tube Flange Gasket 3 Burner Assembly Reflector Overlap Approx 8 Fasten Endcap with Screws Loose Screws Tight Screws LA LX LXR 80 000 BTU 40 Long...

Page 12: ...be Flange Gasket 3 Combustion Non Heat Treated Silver Color Tube Tight Screws Burner Assembly Reflector Overlap Approx 4 to 8 Fasten End cap with Screws Loose Screws Tight Screws Loose Screws Loose Sc...

Page 13: ...inder of the heat exchanger At no time should hangers be more than 12 feet apart Always use all the hangars supplied As a rule the combustion tube first tube utilizes 2 hangers and there after 1 hange...

Page 14: ...nded S hooks and turnbuckles to avoid unhooking chain with inadvertent contact Figure 9 8 9 Tube Reflector Hangers Combustion Tube Reflector Support Coupling Should Be Loosely Fitted Locate Tube and R...

Page 15: ...er box to snugly hold the combustion tube from rotating Figure 10 Note For all coupling joints ensure that the tube joint is in the center of the coupling length and that the overlap joint of the coup...

Page 16: ...heater assembly Ensure heat exchanger sections line up straight Couplings should be tightened as heat exchanger is placed since it is more difficult to do so once the reflector is in position Reflect...

Page 17: ...m movement If required for your heater model refer to Table 1 install the baffle at the end of the heat exchanger The small tab on the baffle is folded over the end of the tube and clamped in place by...

Page 18: ...tors see figure 15 and refer to Clearance to Combustibles information Figure 16 90 Elbow and U Tube Assembly Detail Elbows or U Tubes must be located not less than 20 feet from the burner in LA LX LXR...

Page 19: ...ector with 8 x 3 8 inch screws Use three side shield brackets per side shield Space about 48 inches apart Assemble Corner Bracket to Mitered Reflectors as shown Installation of Mitered Reflector Secti...

Page 20: ...x 3 8 screws Support Bracket Tubing Section Installation of Side Reflector Overlaps Reflector Side Reflector Retainer Bracket Screws to be installed from inside of side reflector Install screws on on...

Page 21: ...hield and held by Screws from outside Installation of Deco Grille Mounted Directly to Heater Notch Deco Grille Support for Hangers and Supports Deco Grille End Angle Fastened to Deco Grille Supports a...

Page 22: ...Optional outside air supply may be directed to the heater horizontally or vertically Important Maximum total vent length allowed for any model heater is 30 feet Maximum total fresh air inlet duct len...

Page 23: ...iple heaters venting through a common roof vent are defined in the appropriate gas installation code Refer to common venting section below Use of an approved thimble to pass through combustible roof m...

Page 24: ...sure simultaneous operation Common Horizontal Venting Figure 26 INCREASE TO DETERMINED B VENT SIZE 6 VENT TERMINAL P N CT044 NOTES FOR HORIZONTAL VENTING 1 USE 4 SINGLE WALL VENT WITH HEATERS OF COMBI...

Page 25: ...er to allow for some thermal expansion of the heater this short piece should be in a linear position and should not have a length longer than 24 inches Outdoor Installation LXR Models Only When a heat...

Page 26: ...that high pressure testing of the system has been completed Failure to do so may expose the burner components to damaging high pressure requiring replacement of key components Flexible gas connectors...

Page 27: ...r to Figure 29 for guidance on electrical wiring of heaters If any of the original wire as supplied with the heater must be replaced it must be replaced with wiring having a rating of at least 105 C t...

Page 28: ...This allows the products of combustion to be removed from the heat exchanger to avoid nuisance condensation and increase heat exchanger life When using a line voltage thermostat and the heat requireme...

Page 29: ...s closed Gas pressure downstream of gas control can be measured by connecting a manometer to pressure tap on control If the valve is closed either the gas valve or the ignition module is faulty Burner...

Page 30: ...If Damaged Is Gas Present At Valve Is Gas Pressure Sufficient Rectify As Required YES Unplug Motor Does Motor Impeller Spin Freely Replace Ignition Control Module Rectify As Required Is Pressure Switc...

Page 31: ...P P N LG004 SPARK ELECTRODE P N LE001 IGNITION LEAD P N CE006 LA LX INDICATOR LIGHT NOT SHOWN YELLOW P N CE057 ROUND GAS VALVE HONEYWELL P N CG003 NAT HONEYWELL P N CG010 LP IGNITION MODULE P N CE015...

Page 32: ...Series LA LX LXR Page 30 6 15 2010 Notes...

Page 33: ...chase In no event shall the Manufacturer be liable for incidental expense or consequential damages of any kind This warranty does not cover any shipping installation or other costs incurred in the rep...

Reviews: