LD(E) SERIES
Contents
1. If the flue vent is blocked or if there is a bend too close to the fan inlet it is normal that the switch does not close the circuit causing a shutdown of the burner It is also possible that the switch closes the circuit when the gases are cold and not closes when the gases are hot This indicates a problem that must be corrected immediately 14 Technologies WARNING A safe and efficient operation requires an adequate evacuation of combustion gases Bypassing a safety device such as a pressure switch on a gas appliance is dangerous and can cause death It can also prevent proper operation of the device and void the warranty 3 6 HIGH LIMIT CONTROL All devices use a high temperature control limit installed to detect a high temperature in the exchanger The main cause of the upper limit circuit opening is a lack of air A lack of air can be caused by several reasons either a fan failure a broken belt a component an insufficient tight belt reverse motor rotation clogging filters too high gas capacity etc Figure 6 High temperature limit probe A second high temperature sensor is installed near the burner to detect a flame outside the heat exchanger If a problem related to this probe is detected it must be repaired immediately The high limit sensors are not adjustable and must be replaced with compatible components installed in the same place and with the same temperature setting Consult the manufacturer for re2. THIS WARRANTY DOES NOT COVER a Damage caused by accident neglect misuse or improper riot fire flood or acts of God b damage caused by the operation of the product in a corrosive atmosphere c damage modification or unauthorized repair the system affects the reliability or performance of the product d damage caused by improper use or improper coupling of the product or its components e damage caused by maintenance inadequate product f any expenses incurred by the erection dismantling or disconnection of the product g parts used for normal maintenance such as filters or belts h products that are at the place of the original installation i products that are not installed or used in accordance with written instructions installation standards applicable local building codes and sound business practices products lost or stolen Nobody is allowed to modify this warranty or create for us or on our behalf any other obligation or liability for our products There are no representations warranties or conditions of any kind express or implied is made implied granted by us or we can link other than those mentioned above nor be liable some way of incidental or consequential damages consequential damages whatever the cause such as but not limited to loss of productivity damages resulting from delays loss of profits or time management To obtain replacement parts under this warranty the product contact the dealer or c
3. FIGURE 1 COMPONENT AND POSITION Combustion flue gas Fresh air intake exhaust Optional Na Electrical connection wi service disconnect Combustion air intake Sealing asket MA u Gas connection WARNING It is important to mechanically fix the unit to the roof base or supporting structure with bolts or other suitable attachment to prevent its movement bag Technologies 2 2 AIR DUCT The ducts are provided on site and it is important that they be installed to Avoid air leakage seal Respect the pressure loss calculated in the design Be isolated if they are in an unheated space Prevent air direction change as little as possible Have an access door to inspect the heat exchanger Be rigid and self supporting Have a low limit sensor installed Respect the rules of art Where fire dampers are used in the ducts they must be equipped with trigger connected to the electrical safety control circuit so that the heater stops when there is presence of intense heat in the ducts or when there is no air flow These electrical triggers must be arranged so that the safety circuit is powered only when fire dampers are fully open WARNING If the unit does not come with a minimum temperature sensor the installer should add this type of probe to prevent any risk of frost in the interior of the building 2 3 ELECTRICAL CONNECTION The electrical connections and grounding must conform to local standards
4. propane gas Control option S2 Si and Cube 17 c Operating pressure propane gas Control option Sib burner 1 only 17 J CODESO OAI D ta 20 19 2 SWC CHOM and mealmte ANG C ai a a a Dana sn mt net et cet 22 FIGURES A ROMO OMG FIA NCD SIN ON ieee D ne OR ee ec 7 2 Electrical connection and high voltage disconnect ss 8 3 Optional wall control pane E 9 EE Leen EE 10 5 Exhaust fan with air pressure switch sise 14 ZER Figh temperature limit ege e 15 API COM Voe DUNO ee 15 o Main two stage gas VA ME sive a ana ee RL nn ces te bee eee eee de 18 9 Solenoid VAIVE JA 18 10 Main and solenoid valves arrangement sise 19 11 Exhaust fan with damper and guillotine adjustment 2 sess enenennnnenzannenzzunznnznnzznnnamzzananzznznnnzzzz 20 180 e aid 69 Bee i o L aen E 24 SZ Technologies GENERAL This manual is designated for the ventilation units with heat exchanger gas bearing the LD E designation These devices bear the certification mark cE TLus with code requirements CSA C22 2 No236 UL 1995 The capacity of your device and the type of gas can be found on the nameplate The electrical characteristics of the device are also listed on the nameplate All internal and external electrical installations must comply with the electrical schematics of the heater For more information refer to the following sections of this manual and wiring diagram included with this unit D
5. 16 SZ Technologies 4 1 2 Capacitv and pressure Propane Gas TABLE 7A Capacity Propane gas S1 Control and S2 option Heat exchanger model LDE 120 LDE 180 LDE 240 LDE 300 LDE 350 LDE 400 High fire capacity 100 S1 and S2 120 MBH 180 MBH 240 MBH 300 MBH 350 MBH 400 MBH Low fire capacity 60 S2 only 72 MBH 108 MBH 144 MBH 180 MBH 210 MBH 240 MBH TABLE 7B Capacity Propane gas Control option Si and SiB Burner capacity low fire 60 1 burner capacity SIB only ow fre Ill 1 40 MBH 40 MBH 40 MBH TABLE 8A Operating pressure Propane gas SIControl Heat exchanger model LDE 120 LDE 180 LDE 240 LDE 300 LDE 350 LDE 400 Inlet pressure max min 14 12 in w c 14 12 in w c Operating pressure High fire 100 Altitude from 0 to 2000 foot POI One Operating pressure High fire 100 TABLE 8B Operating pressure Propane gas Control option S2 Si and SiB Heat exchanger model LDE 120 LDE 180 LDE 240 LDE 300 LDE 350 LDE 400 14 12 neg 14 12 inwec Operating pressure High fire 100 e l k Altitude from 0 to 2000 foot 10 0 3 5 in w c 11 0 4 0 in w c Operating pressure High fire 100 Altitude from 2001 to 4500 foot Except burner 1 see table 8C 6 9 2 3 in w c 7 6 2 8 in w c TABLE 8C Operating pressure Propane gas Control option Sib Burner 1 only Heat exchanger model LDE ans CE e
6. In Canada refer to the Canadian Electrical Code CSA C22 1 and the United States NFPA 70 In addition this connection must be installed according to the rules of art and must meet local codes having jurisdiction The connection must be made at the prescribed place within the electrical control panel See the wiring diagram supplied with the unit FIGURE 2 Electrical connection and high voltage disconnect un a Technologies FIGURE 3 Optional wall control panel Model S 10 1 2 1 x 5 1 2 h Model M 10 1 2 1 x 10 1 2 h STANDARD EQUIPEMENT Selector stop fan burner Fan operation light Burner operation light Terminal blocks Temperature selector M model only BOUSQUET Model S WARNING If a portion of the wiring supplied with the unit must be replaced or if wiring must be added to the unit it must be replaced by wiring sheathed with an approved material to withstand a temperature of 2212F 105 C or more The wirings of the flame sensing probe the igniter and control of high limit must be replaced by wiring sheathed with an approved material to withstand a temperature of 3022F 150 C or more 2 4 GAS CONNECTION The gas supply piping must be designed according to the requirements of installation of gas appliances of the edition in force of the Code CSA B149 1 for Canada and the ANSI Z 223 1 and NFPA 54 for the United States In addition the same piping must be installed according to the ru
7. S2 120 MBH 180 MBH 240 MBH 300 MBH 350 MBH 400 MBH Low fire capacity 60 S2 only 72 MBH 108 MBH 144 MBH 180 MBH 210 MBH 240 MBH TABLE 5B Capacity natural gas Control option Si and SiB Burner capacity low fire 60 TABLE 6A Operating pressure natural gas S1Control Heat exchanger model LDE 120 LDE 180 LDE 240 LDE 300 LDE 350 LDE 400 14 7 in w c 14 7 in w c Operating pressure High fire 100 P k Altitude from 0 to 2000 foot 3 9 IN W C 4 2 in w c Operating pressure High fire 100 TABLE 6B Operating pressure natural gas Control option S2 Si and SiB Heat exchanger model LDE 120 LDE 180 LDE 240 LDE 300 LDE 350 LDE 400 14 7 mwe 14 7 inw Operating pressure High fire 100 Mi k Altitude from 0 to 2000 foot 3 5 1 3 in w c 4 2 1 6 in w c Operating pressure High fire 100 Mi S Altitude from 2001 to 4500 foot 2 3 0 9 in w c 2 8 1 1 in w c Except burner 1 see table 6C TABLE 6C Operating pressure natural gas Control option Sib Burner 1 only Heat Ee mode LDE 120 a LDE 240 LDE 300 LDE 350 LDE 400 14 7 in w c oe pressure Get fire 100 5 0 0 9 in w c 5 0 1 0 in w c Altitude from 0 to 2000 foot Operating pressure High fire 100 Altitude from 2001 to 4500 SC 3 5 0 6 in w c 3 5 0 7 In w c The gas pressure is measured at the manifold output of the main valve
8. air inlet and outlet from the heater and the combustion air inlet Check the fresh and return air dampers operation MEAN IT Ensure that all safetv controls are functional MENT INN Check the exhaust system and the pressure switch Te Ensure there is no gas leaks in the piping fittings and valves and check the gas pressure at the manifold Make sure the fan and motor are firmly anchored Pf fe Verify the control sequence and ignition system Pf fe Clean the cage and the wheel fan of the burner TL o Clean the inside and outside of the exchanger remove surface rust dust etc Clean the flame sensor probe and the igniter PP e IMPORTANT BEFORE START UP AND AFTER 8 HOURS OF OPERATION Check the alignment and lubrification of bearings Check the bearing collars Check the alignment and belt tension AFTER 48 HOURS OF OPERATION Check belt tension 22 SZ Technologies WARNING If you turn off the power of the unit close the manual gas valve WARNING If the air contains a large amount of dust a second cleaning may be required during the heating season Failure to clean gas appliance is dangerous and can cause death It can also prevent proper operation of the device and void the warranty 6 1 ASSEMBLY DISMANTLING For dismantling and assembly of a component refer to the appropriate section Always follow the steps in commissioning described in Section 3 of this manual before turning on gas equipment 6 2
9. authorities before installation and startup Additional suggested checklist before starting the unit 1 Check the strength of the installation The unit must be well supported and level 2 Check clearances of combustible material specified in this manual and make sure to respect them 3 Check the supply of combustion air 4 Check the exhaust system and make sure it meets the requirements prescribed in this manual and the codes in your area 5 Check gas piping for leaks and the supply pressure 6 Check the wiring make sure that the wires used the circuit breaker and fuses have good rating 7 Make sure there is good airflow in the unit 8 Check the location of temperature sensors and the control sequence without gas supply Ignition sequence Adjust the heating demand to the off position Open the main manual gas valve Open the manual gas valve on the electric combined valve Turn power on of the unit The fan should start and the dampers position should be set correctly Adjust the heating demand of the controller to the desired temperature The flue gas exhaust fan starts The flow switch in the exhaust fan closes the contact A pre purge of 30 seconds occurs 10 The ignition occurs the gas valve opens and the burners ignite instantly If this sequence is not followed properly check wiring installation and the gas supply and try again Se ORNE Additional suggested checklist after start up 1 With the burner
10. disconnect the piping seal the ends install the device and perform the test For a supply pressure of 14 in w c 3 5Kpa or less close the valve and install the device Perform the pressure test to ensure you have a quality device and well calibrated Once the unit is installed and prepared for safe operation the operating pressure of the piping downstream of the gas valve should be adjusted according to the procedure and the pressures specified in Section 4 1 of this manual Use the chart below to size your gas supply pipe For different operating pressures refer to the CSA B149 1 codes in Canada and ANSI Z 223 1 NFPA 54 for the United States TABLE 3 Gas piping capacity GAS PIPING CAPACITY MBH For an operating pressure of 7 in w c For natural gas with a pressure drop of 1 in w c Length External diameter of piping in m 20 f 28 TA 8 1401 29 24 5 w 1 250 55 963 28 9 a a w 20 429 778 7 20 LL tT 662 2 5 2 f a y or f a e y Cu 531 CAUTION All pipe unions must be tested before starting the unit Never test for gas leaks with an open flame The supply pressure must be tested and must not exceed a maximum pressure of 14 in w c 3 5Kpa A non respect of one of these requirements is hazardous and can cause death It can also prevent proper operation of the device and void the warranty 10 SZ Technologies 2 5 EXHAUST SVSTEM It is verv important to not direct the out
11. gas valve See the sequence of operation of the burner with multiple levels mg Technologies 1 4 CONDENSATION The combustion produces huge amounts of water vapor This water vapor is contained in the flue gas of the appliances and can condense if the temperature falls below the dew point The condensate should be controlled by taking certain precautions to prevent their formation They can settle in the tubes the collector the fan and exhaust system To avoid damaging the heat exchanger just follow the directions for installing the drainage system specified in Section 2 5 of this manual To avoid the accumulation of condensation in the flue gas collector it is possible to add a drain ensuring to prevent freezing of condensation and install a gooseneck The drain is located on the flue gas manifold below the exhaust fan WARNING A safe and efficient operation requires regular inspection and proper maintenance of drainage system A broken exhaust system or a gas leak is dangerous and can cause death It can also prevent proper operation of the device and void the warranty 2 INSTALLATION INSTRUCTIONS 2 1 GENERAL The LD E units model are designed for outdoor installation on a roof a structure or ground on a concrete base The air intake must be located so as to avoid the snow rain flammable or toxic gases and other substances harmful to the health of occupants and the unit from entering in the air intake of the air heater
12. of the unit will be reduced in the same proportion 4 per 1000 ft 304m For operations at a higher altitude consult the manufacturer WARNING Carbon monoxide CO is an odourless and deadly gas A device operating with the wrong orifices may produce a high amount of CO in the combustion gases This high amount of CO can also prevent the proper functioning of the device and may void the warranty Exposure to this gas is dangerous and can cause death 18 SZ Technologies 4 2 BURNER OPERATION SEQUENCE SIMPLE STAGE S1 Option Devices with the S1option come with a one stage gas valve running on a power supplv of 24 volts The gas valve is open or closed either 0 or 100 of the capacity of the unit S1 option combined valve includes a pressure regulator an internal redundant valve and manual valve closure Control of a valve at one level is simple and provides good accuracv of the temperature with a 24 volts thermostat well localized or a drv contact in a centralized control svstem when heating a large enough Space warehouse garage gym etc The design of the main valve maintains a stable manifold pressure with a range of inlet pressure ranging from 7 w c to 14 w c DOUBLE STAGE S2 Option In the event that heated a smaller room or a room where the comfort level must be higher classroom large office shopping center exhibition hall etc the use of a two stage gas valve is essential It must be operated by a two
13. operating at full capacity measure the gas pressure to the tubing immediately after the main gas valve The pressure at full capacity should be consistent with data from section 4 1 of this manual 2 Turn OFF then ON the burner while waiting one minute between each cycle to verify that the lighting is soft and without flashback On systems with multiple levels make sure that all heating systems work well in the sequence of operation of the burners described in Section 4 2 3 Observe the flame at full capacity ensuring a good combustion with the use of a calibrated combustion analyzer Follow the instructions in Section 4 3 to determine the characteristics of such devices 4 Check the high limit controller by cutting the air flow It should stop the burner in about a minute and restarts once it is cooled 5 Check the air flow switch in the gas exhaust fan by blocking the flue outlet The burner should stop immediately and re ignite after a pre purge of 30 seconds 6 Make any checks deemed necessary depending on the application options selected and the mode of operation specific to this project 7 Leave a copy of this manual in a safe place near the unit 13 SZ Technologies WARNING For safe operation of a gas appliance it is verv important that the ignition sequence is checked to ensure proper ignition A gas appliance which is incorrect ignition timing is dangerous and can cause death It can also prevent proper operation of t
14. CORROSION Corrosion can occur in exhaust ducts and in the heat exchanger if the combustion air contains chemical vapors Products containing chlorine are the most frequently encountered In the process of combustion the chlorine molecules are converted into hydrochloric acid which is very aggressive on metals even stainless steel 300 series Such corrosion can lead to very fast degradation of the exchanger The following are examples of sources of corrosion aerosols cleaning solvents refrigerants pool chemicals calcium and sodium chloride waxes glues etc In the presence of these products the heat exchanger and vent system may in one heating season to be damaged enough to need replacing Such products should not be stored or disposed of so that their vapors can contaminate the combustion air or come into contact with the gas appliance WARNING Failure to meet these requirements is dangerous and can cause death It can also prevent proper operation of the device and void the warranty 6 3 GAS VALVE The main gas valve is supplied with 24 volts from the ignition controller The primary function of the gas valve is shut off gas supply to the burner by a request to stop from the ignition controller The second function is to reduce the inlet pressure to the pressure of operation necessary to the tubing using a diaphragm type regulator The pressure is adjustable with an adjustment screw which is located under the unscrewed protective cover
15. INDIRECT GAS FIRED AIR HEATERS LD E SERIES Model 120 180 240 300 350 and 400 outdoor INSTALLATION AND SERVICE MANUAL APPROVALS Our gas fired air heater of LD E series with output up to 400MBH are listed cETLus for Canada and United States as per standards CAN CSA C22 2 No 236 05 3 edition and ANSI UL 1995 respectively for an outside installation only Made by a BOUSQUET Technologies V2 Technologies WARNING Installation and service must be performed by a qualified installer service agency or gas supplier qualified to followed and understand the instructions in this manual the codes having jurisdiction as well as those requires for the particular application of this equipment WARNING Improper Installation modification adjustment or maintenance may cause property damage personal injury or death Carefully read the installation and maintenance instructions before installing or servicing this unit A ATTENTION GAS ODOR If a gas odor is detected 1 Open all doors and windows 2 Do not touch any electrical switch 3 Extinguish all open flames 4 Immediately notify your gas supplier WARNING Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WARNING A gas equipment is not designed for use in a place that contains flammable vapors combustible dust an atmosphere of hydrocarbon chlorides or silicone particles in Suspen
16. ONO LE 23 SE 23 b OS TA E EEEE AEE EEEE 23 6 5 Ignition system sequence HA EE AKE A EEKEHEKEIEEKENEEKENEKENTEEEEnzEnEnzzEnzEn 24 he General WAIN ali a ee 25 old UP IONA ae A D D a ne om 26 SZ Technologies ABBREVIATIONS The following abbreviation of words and expressions are used in this manual BHP Break Horse Power Btu h British thermal unit per hour C Degree Celsius W C Water column F Degree Fahrenheit h heure PSI Pound per square inches of relative pressure M meter mm millimeter MBH 1000 BTU h ft foot in inche in W C inche of water column rom rotation per minute TABLES 1 Minimum clearances l KEEA EE AKE NE EEA NE HEKEIEEKENEENEN TEEN NI KEEEI ZEKZIK NENEEIKENEnEEEEzz Enti 6 PER MOM a e Et 6 a Qas e elle CAPAGIW ma iressaq a B a A E 10 4 Clearances from the gas exhaust of the unit 11 5 a Capacity natural gas S1 Control and S2 option 16 b Capacity natural gas Control option Si and GR 16 6 a Operating pressure natural gas S1Control ss 16 b Operating pressure natural gas Control option S2 Si and Gi 16 c Operating pressure natural gas Control option Sib burner 1 only 16 7 a Capacity propane gas S1 Control and S2 option 17 b Capacity propane gas Control option Si and GR 17 8 a Operating pressure propane gas S1Control ss 17 b Operating pressure
17. See Section 4 of this manual The solenoid valves on all burners are supplied with 24 Volts or 120 Volts WARNING The valve is the only way to ensure an automatic shutdown of gas flow It is therefore very important to ensure that the gas supply pipe is clean and contains no metal burrs or water Incomplete closure of the valve is dangerous and can cause death It can also prevent proper operation of the device and void the warranty 6 4 EXHAUST FAN The gas combustion exhaust fan motor is permanently lubricated clean surface as needed It runs on a voltage 110 1 60 see the nameplate and model number If it is necessary to replace one of the following motor fan cage or squirrel cage it is very important to replace them with original parts only See photo of the exhaust fan figure 11 23 SZ Technologies WARNING The exhaust fan is the only way to ensure evacuation of combustion gases to the outside It is therefore very important to make sure it is in good condition and properly connected Inadequate evacuation is dangerous and can cause death It can also prevent proper operation of the device and void the warrantv 6 5 INGNITION SVSTEM SEQUENCE This unit has a direct ignition svstem that monitors and controls flame ignition and gas valve This svstem uses an ignition distributor combined with the probe for detecting the flame The flame is detected bv the method of correction works as follows a weak electrical signal isol
18. and the sequence of operation of the electrical diagram prior to the start or work on the device 3 2 MAIN FAN ADJUSTMENT Before undertaking checks on gas it is important to have good air flow Adjustment of the air flow is required to obtain the required capacitv and minimum capacitv of air to prevent overheating of the exchanger Check the voltage of each phase to the main switch Check the direction of fan rotation and interchange phases if needed Make sure that the overload relay of the switch is set to the maximum current FLA indicated on the motor nameplate Check alignment and belt tension do this test without power supply When the dampers are fully open take a reading of the amperage on each phase of the motor the rotation speed of the fan RPM and see if they meet the criteria for project design placed on the fan curve Make a test air flow and adjust the fan speed necessary to get the proper air flow 12 SZ Technologies 3 3 BURNER ADJUSTMENT It is verv important to ensure that the installation of the unit complies with all the instructions in this manual Vou must ensure that it meets all the requirements for installation of gas appliances up to date edition of the CSA B149 1 code for installation in Canada and the ANSI 2223 1 NFPA 54 for installation to United States The unit must be installed according to the rules of art and must meet code requirements in force in vour area Consult the relevant
19. ated from the ground is applied to the detection probe through the ignition controller When there is a flame in the immediate vicinitv of the rod the flame acts as a conductor to the ground It is said that the flame corrects and completes the circuit DC which is automatically detected by the controller of ignition The ignition sequence is simple but it must be understood before undertaking a correction of a defective unit or new one Following a thermostat demand the secondary circuit feeds a 24 volt relay The relay produces a contact to start the exhaust fan running on the current primary system 110 volts Depending on the exhaust fan applies a negative pressure on the pressure switch that closes the secondary circuit and feeds the ignition controller Pre purge of 30 seconds before ignition occurs In series with pressure switch there is two high limits of air If one of them is open the circuit remains open and the ignition will not occur Then the controller produces an ignition spark to the igniter and gas FIGURE 12 ignition controller valve opens simultaneousiv The controller will wait a maximum of 7 seconds for a flame detection before closing the valve The controller will not attempt to light the burner again if the lighting fails For the proper functioning of the flame sensing probe a minimum signal of 1 5 microamps is required It can be measured with a microammeter The spacing between the rod of the ignitor and the stem of the g
20. cific installation requirements for this type of device If you have questions contact the manufacturer Verify if the unit is supplied with separate options that require field installation for example a modulating probe a room thermostat a seal a fresh air intake a gas regulator etc 1 2 CLEARANCES The units must be installed to comply with the clearances to combustible materials such that it is shown in TABLE 1 It is strongly recommended to have no obstacles within 10 feet 8m of the fresh air intake to avoid water and snow from entering TABLE 1 Minimum clearances VENT FRONT FRONT REAR SIDES FLOOR CONNECTOR ACCES PANEL 1 3 MINIMUM AIR FLOW REQUIRED The minimum air flow in each unit is limited by the temperature rise that should not exceed 120 F 67 C when the burner operating at full capacity TABLE 2 Air flow EC LD E 120 LD E 180 LD E 240 LD E 300 LD E 350 LD E 400 1481 699 2222 1049 2963 1398 3705 1749 4321 2039 4938 2330 740 350 1111 524 1481 698 1851 872 2160 1018 2469 1164 Min reduce flow contact open 444 210 667 314 889 419 1111 523 1296 611 1481 698 The air volume of these devices can be reduced to 60 of the maximum specified by opening the contact of reduced air flow This contact reduces the position of the fresh air damper opening to the potentiometer set point and prevents the high fire mode on the main
21. e Start up Voltage read before the unit Vac Electric circuit low voltage read V Amperage 1 Low voltage Amps 2 Motor Amps Gas pressure STOP HIGH FIRE LOW FIRE HIGH FIRE ____INLET PRESSURE__ _MANIFOLD PRESSURE _ Various checks Flame OK low fire one tube LI Sufficient air inlet opening for combustion LI Flame OK low fire all tubes LI Prepurge 30 sec delay correct LI Flame OK high fire LI Burner lit in a 7 seconds delay max OI Logic module program installed and the sequence 1s correct LI Pressure reading access are closed gas valve LI Signal stages control 0 10 volts CC verified Start up completed L If not whv comments Signature Date 26 SZ Technologies INSTALLATION AND MAINTENANCE MANUAL FOR INDIRECT FIRED AIR HEATER LD E SERIES PROJEGT ADDRESS MODEL SERIAL NUMBER INSTALLER ADDRESS PHONE INSTALLATION DATE MANUFAGTURER BOUSQUET Technologies inc ADDRESS 2121 NOBEL SAINTE JULIE QUEBEC J3E 129 PHONE 514 874 9050 1 800 363 9197 FAX 450 649 8756 EMAIL bousquet bousquet ca WEB SITE www bousquet ca THIS MANUAL SHOULD ALWAYS BE STORED WITH THE HEATER AND BE READABLE 2 Rev 24 11 2011 28
22. ee LDE 180 LDE 240 LDE 300 ME 350 LDE 400 Inlet pressure max min 14 12 in w c Operating pressure High fire 100 A ie uniz Altitude from 0 to 2000 foot 11 0 7 0 in w c Operating pressure High fire 100 Altitude from 2001 to 4500 7 6 4 8 in w c The gas pressure is measured at the manifold output of the main valve 17 bag Technologies FIGURES 8 Main two stage gas valve High fire adjustment Low fire adjustment Manifold pressure reading Figure 8 shows the screws HI and LO to adjust the high and low pressure in the manifold tubing Adjust the high pressure first and then adjust the low then make a verification of high pressure to ensure it has not changed Figure 9 shows a solenoid valve used with the Si and Sib option These valves are installed upstream of each burners and the orifices are installed on that valve No adjustment is required on these valves Figure 9 Solenoid valve At high altitude a decrease in oxygen in the air for combustion decreases the ability of a device at a rate of approximately 4 for each 1000 feet elevation 304 m in altitude above sea level it is therefore very important to reduce the gas pressure according to Tables 6 A B or C or 8A B C depending on the option of your device Without this pressure reduction combustion will be incomplete and excessive production of carbon monoxide CO will occur It should be noted that the net capacity
23. evice installed in Canada The heater must be installed according to the code for installing gas appliances CAN CGA B149 1 in force and the provincial regulations that applv to this categorv In addition the facilitv must be made according to the rules of art and must meet code requirements in force in vour area All electrical installations must meet the standards C22 1 Canadian Electrical Code and comply with local codes applicable to that class of device Device installed in the United States The heater must be installed according to the code for installing gas appliances NFPA 54 in force and regulations applicable to this categorv In addition the facilitv must be made according to the rules of art and must meet code requirements in force in vour area Electrical installations must meet the standards set out in the U S electrical code NFPA 70 and comply with local codes applicable to that class of device SZ Technologies 1 INSTALLATION PARAMETERS 1 1 RECEIVING AND PREPARATION This equipment has been tested for operational safety at the plant before being delivered If the product has been damaged contact vour dealer Check that the name plate indicates the right number of required model the right capacity the right voltage and that the gas supplv is compatible Read and familiarize vourself with all instructions in this installation manual before beginning the installation and contact local authorities that mav have spe
24. g The first sample must be taken in an opening provided for that purpose on the collector of exhaust gases This opening is to the right of the exhaust fan and under the insulation The probe must be placed at the mouth of the burner tube 1 of the exchanger For this test it is important that the firing rate is adjusted to obtain the high pressure to the manifold and the minimum burners lit for this setting For example the model 400 of 8 natural gas burners you must have five burners lit with a tubing pressure of 4 2 w c This setting serves as a reference for a good operation on all other setting Adjust the combustion after a representative sample by closing or opening the shutter manual fan outlet of combustion or the guillotine placed on the gas collector box see Figure 11 Note that a very small movement of the guillotine will be a big change in the combustion Use the samper to make final adjustments Following the adjustment of the plan according to data from above table it will be needed to check the fire setting up and down with all burners on For example the model 400 of 8 burners check the flue to the chimney outlet manifold pressure of 1 6 w c and 4 2 w c this with all burners on To change the pressure or the firing rate to the manifold adjust the 0 10Vdc signal to the multiple levels controller up you ll get the high pressure high fire For low pressure low fire disconnect the 24V power supply that powers up the h
25. he device and void the warrantv 3 4 IGNITION CONTROL Verification procedure of ignition control during unit start up e Check the spacing of the igniter it should be 0 164 in 4 17 mm e Check the grounding Improper grounding can cause intermittent ignition and flame detection problems e Make sure the power is on and the manual valve is closed e Set an heating demand and check the spark at the igniter that will last 7 seconds It should be in the igniter gap and have a good intensity e Make sure the gas supply is open e Set an heating demand and check the spark igniter to light the burner as expected in 3 to 5 seconds e Make sure that after 7 seconds of ignition the gas valve is fully open the burners are lit and the Spark igniter makes no more sparks e f ignition does not occur check the ignition sequence in section 6 5 of this manual 3 5 FLOW SWITCH FOR EXHAUST FAN A pressure switch is used to ensure the proper functioning of the combustion gases exhaust fan which is used to exhausts gases and admitted air into the burner The function of this sensor is to read the presence of a sufficient flow of exhaust gases The switch closes the circuit at a lower pressure of 0 53 0 03 in w c and opens when pressure reaches the level of 0 40 0 03 in w c This contact is connected to the ignition controller as proof of safe operation of the fan FIGURE 5 Exhaust fan with air oressure switch d i a
26. igh pressure of the main valve Note that the combustion reading from analyzer differ depending on the calibration the gas pressure air temperature and quantity on the exchanger dust and wind environment If you cannot reach the specified data in Table 9 contact the manufacturer Damper adjust MAN to 307 at Guillotine pP factory i FIGURE 11 Exhaust fan with damper and guillotine adjustment WARNING Carbon monoxide CO is an odourless and deadiv gas A device operating with the wrong orifices mav produce a high amount of CO in the combustion gases This high amount of CO can also prevent the proper functioning of the device and may void the warranty Exposure to this gas is dangerous and can cause death 20 SZ Technologies 5 SHUTDOWN PROCEDURE 5 1 EXTENDED SHUTDOWN When the heater is not used for a long period of time it is recommended to shut off gas and electric power Before turning the heater on after an extended shutdown it is recommended to purge air from gas lines and to verifv that the gas pressure is appropriate It is recommended to inspected the unit and do all start up steps to ensure that evervthing is in order 5 2 EMERGENCY SHUTDOWN When the heater shuts down in an emergency situation place the main switch in the off position and turn off the gas supply by closing the power and the manual valve outside of the heater 5 3 RESTART AFTER A FLAME FAILURE Following a flame failu
27. is dangerous and can cause death It can also prevent proper operation of the device and void the warranty 2 6 COMBUSTION AIR Gas combustion requires a significant amount of air to ensure complete combustion and maximum efficiency of the device The combustion air intake must not at any time be blocked or obstructed by snow or otherwise The air intake opening must be located a minimum of 12 inches 800 mm above any surface that can accumulate snow If your area has high annual snowfall it is better to increase this clearance WARNING NEVER obstruct the combustion air intake or ventilation NEVER install a gas appliance in a room that has no outside air supply for combustion NEVER install this unit inside 11 SZ Technologies 3 START UP INSTRUCTION IMPORTANT The following information should be used only by qualified technician in gas appliance with qualification cards with knowledge of electricity and ventilation CAUTION It is important to not smoke during the start up of the heater Equipment required for start up Voltmeter Ammeter Temperature reader Combustion analvser Tachometer read speed of the fan and motor Velocitv pressure sensor Pitot tube Gas pressure gauge o Scale of 0 to 5 in w c o Scale of 0 to 15 in w c 3 1 WIRING DIAGRAM The wiring diagram is located inside the access panel in an envelope and a copy is pasted on the inside of the access panel It is important to underst
28. les of art and must meet local codes having jurisdiction The units were designed to operate with a supply pressure of not more than 14 in w c 3 5Kpa For a higher pressure system a high pressure regulator must be installed Its capacity should be designed to reduce supply pressure to a level below the maximum prescribed at any time off or on In addition the regulator must be able to maintain a stable supply pressure at reduced capacity The reduced capacity of these units can be as low as 5 of their maximum capacity The units were manufactured for use with natural gas having a calorific value of 1007 Btu cubic foot If the gas distributor does not meet this specification contact the manufacturer for proper selection of the orifices Close to and upstream of the unit a union followed by an approved manual valve should be installed see FIGURE 4 A gas connection must be provided to allow a reading of the supply pressure Check with a leak detection solution to all joints of the pipe for gas leaks Outlet to unit nn a Technologies FIGURE 4 Gas connection Gas inlet Manual gas valve t Gas inlet The connection must be outside the unit E Drip leg check with your local codes for this application Gas supply from the low pressure regulator 14 w c maximum Perform a pressure test on all installations as follows For a supply pressure of more than 14 in w c 3 5Kpa close the manual valve
29. ontractor who installed our product or who performs maintenance Only dealers or contractors who are registered with us are allowed to honor the warranty If your dealer or contractor needs assistance his distributor is available for this purpose and it has our support KEEP THIS IN YOUR RECORDS FOR FUTURE REFERENCE This warranty is expressly given and accepted in lieu of all other warranties expressed or implied including without limiting the generality of the foregoing all warranties of merchantability fitness for purpose or a particular function In some provinces the laws do not allow the limitation or exclusion of liability implied warranties or conditions in certain circumstances and limitations and exclusions above may not apply to you 29 SZ Technologies START UP FORM FOR INDIRECT FIRED LD E MODEL Companv Project Technician Project manager Installer Address Manufacturing informations Unit model Serial number Exhaust fan model Identification number Burner model Burner serial number Fan tvpe Surcharge amps Motor pullev Belts Fan pullev C C of pullevs HA Motor information hp Vac amps Inspection Fan rotation verified C Belts correctly installed C Air duct installed LI Remote control panel installed LI All ALLEN screws of bearing collar are tighten _ No gas leaks detected L The joint between the air inlet and the unit is caulked with sealant on top and sides L Not
30. placement parts WARNING A lack of tube cooling will cause an accelerated degradation of the area not cooled and it can also prevent proper operation of the device and void the warranty Degradation can cause a leak of flue gases in the air Leakage of combustion gases is dangerous and can cause death 4 BURNER These units use injection and venturi type burner They allow a stable flame and efficiently without flash back and this without any adjustment The burners are installed on removable media to allow an annual inspection of tubes The burners should be aligned with the longitudinal axis of the tubular heat exchanger Contact of the flame on a non centered heat exchanger will cause a degradation and even perforation of the exchanger In a device with the option Sib the burners do not all have the same capacity See Tables 5A and 5B for more information Figure 7 Air injection type burner Model 120 180 and 240 Model 300 350 and 400 15 SZ Technologies 4 1 CAPACITV AND OPERATION PRESSURE Each burner uses an orifice with a specific opening according to its rated capacitv The following tables provide the capacitv and operating pressure for each model depending on the control option selected 4 1 1 Capacitv and pressure Natural Gas TABLE 5A Capacitv natural gas S1 Control and S2 option Heat exchanger model LDE 120 LDE 180 LDE 240 LDE 300 LDE 350 LDE 400 High fire capacity 100 S1 and
31. put to a fresh air intake a combustion air inlet of another device an opening of the building or wall It is possible that the clearances given in TABLE 4 are not suitable because of the horizontal projection of the combustion products Particular attention should be made to each application A safe appropriate distance mav be added to the clearance shown in TABLE 4 depending on application TABLE 4 Clearances from the gas exhaust of the unit Minimal clearance from vent Cap Motorized air intake less than 3 m 10 ft 3 m 10 ft on side or 0 9 m 3 ft over Combustion air inlet of another device 1 8 m 6 pi Door operable window gravity air intake or any other 3 m 10 ft on side or 0 9 m 3 ft over opening Electric or gas meter regulator 0 9 m 3 ft on side Vent outlet of another device 0 9 m 3 ft Building or adjacent wall or guard 1 8 m 6 ft Sidewalk or parking vehicles 2 1 m 7 ft over Ground 0 3 m 1 ft over the snow level Obstacle around the unit Over any obstacle from less than 1 8 m 6 ft If the local codes have more restricted clearances you must respect them Do not install the chimney outlet over a service regulator or gas meter Take precautions to avoid installing vent outlet where snow accumulation can be done either by a shift from a roof or near a wall WARNING A safe and efficient operation requires an adequate evacuation of combustion gases A broken exhaust system or a gas leak
32. re alarm check the following FAN Place the switch to the OFF position Check the fan belts and replace or adjust them if necessary Check the condition of filters and replace if needed Make sure nothing is blocking partially or completely the air intake and exhaust of the heater Make sure that nothing prevents the proper functioning of the components of the air intake and exhaust PE a HEAT EXCHANGER Make sure all gas valves are open Make sure there Is no gas leaks Check if the unit is damaged Place the disconnect to ON position with the gas valve in closed position Adjust the thermostat or controller to the desired temperature Make sure the exhaust motor fan works Make sure the ignition works properly Repair if needed and repeat the start up procedure e E bd Ke 21 SZ Technologies 6 MAINTENANCE The instructions for installation and maintenance of this manual are designed to help a qualified technician To ensure optimum performance and safety all gas equipment must be properly inspected and maintained periodically A list of maintenance tasks to be performed is provided in the following table TABLE 10 Inspection and maintenance VERIFICATION cian Check air filters Replace them if necessary Pe ff Check bearings lubrification adjust the screws on the collar and condition of belts Ensure that no combustible material is stored near the heater ce J o Make sure nothing is blocking the
33. rners turned on at low fire it will have a capacity of 72 MBH 4x18MBH After increasing the manifold pressure and reduction from 4 to 3 burners the capacity will be 90 MBH 3x30MBH then 120 MBH 4x30MBH for an increase to 4 burners FIGURE 10 Main and solenoid valves arrangement 4 3 COMBUSTION CONTROL lt is possible that due to the transport installation or during normal operations of this unit maladjustment of the combustion occurs To restore data from combustion and thermal efficiency specified by the manufacturer a recently calibrated combustion analyzer is required It is important to understand the operation of such devices prior to the adjustment of the burner as an inadequate combustion can produce overheating of the exchanger excessive production of carbon monoxide CO and or a carbonized exchanger 19 SZ Technologies For units equipped with S1 and S2 control options it is sufficient to sample combustion in the chimnev outlet near the exhaust fan The samples must be taken at high fire for S1option and high and low fire for S2 option The results should be comparable to the following Table 9 Combustion reading Model Reading CO2 90 Excess air 96 Thermal efficiencv LDE 120 180 et 240 55 to 80 lt 100 ppm 80 82 LDE 300 350 et 400 7 5 to 9 35 to 55 80 82 For units equipped with the Si or Sib control option take three samples in two different places depending on the modulation settin
34. round must be 0 164 inch 4 17 mm The igniter must be connected and grounded in ensuring continuity between the burner and ignition controller For more information on the ignition controller refer to the operation manual and installation of the controller provided by the manufacturer WARNING The ignition system operates at high voltage For safe handling disconnect the power before handling the ignition components 24 SZ Technologies 7 GENERAL WARRANTV During the first vear following the installation of our product or eighteen 18 months from the date of shipment bv Bousquet Technologies Inc according to the first of these events but subject to the terms and conditions of the this we will provide free anv part component of our product with a defect or manufacturing defect Anv parts supplied in replacement is guaranteed for the unexpired portion of the original warrantv for our product The defective part must be available to trade against the new part All costs for labor materials transportation shipping or other incurred in the performance of this warranty will be charge by the owner s current rates and prices then in effect This limited warranty applies to new and unused products purchased from us or our authorized dealers provided that the instructions contained in the manual have been met You acknowledge and understand that our only obligation is to replace the defective part and you have no recourse against us
35. sion SZ Technologies TABLE OF CONTENT PATO WLU e EE 4 TAO SAGO Ke ao ee D ee RO de E 4 IS ue renter E E 4 LS TS i E 5 1 Installation parameters ccccccsecccsecccseeceeeeceseeecsuceceueesseeseeeeceueeseeessueeecsusecsusessueesseeeeesueesseeessaeeess 6 1 1 Receiving ana Prep e de E 6 kee Gea e et 6 1 3 Minimum ar HOw FOOTING aan ae a ke ee mr ee 6 rA CONCESSION ke 7 23 Installa tOmM Si ett A si aa 7 e OO a be 7 SE 8 2 3 EIEGIIGAI GONMEGCHOM karta di ta E A G ne te di 8 2 4 Gas connection ses nomecsc entree nnenmosmerc sondes mere ssbedveduetebuatseosneenlenedeciedasreeendinsdests 9 20 EXMALISt G EE 11 2 0 CONMIDUS HOM AI ne A sa er 11 ig Old CD WS OO e 12 l VIII CCCI A an ia a a S 12 3 2 Main fan adjustment is AKRA NE KAME NE EEARENENENEZZNENENZNNNEEZZNENEEEZZENZEZEZI 12 33 el E EE 13 Al IO aide ee d e a an ten ob O 14 90 FOW Ne for RAS PA ae ee De nie 14 Oe ON Tan W ON HO EE 15 OUR AEA 15 4 1 Capacity and operation pressure cccccceeecceceeeeceeeeeceeeeeesaeeesaeeeesseuceeseeeeseeeessegeeesaaeeessneees 16 4 1 1 Capacity and pressure Natural Gas 16 4 1 2 Capacity and pressure Propane Gas 17 4 2 B rner operation SEQUENCE EE 19 4 3 Combustion Control 19 E a Breed eelere TEE 21 Del EXTON StU EE 21 5 2 ECO rQenewEntieo WA a iii ee a iea r E REO A a 21 5 3 Restart after a flame failure E 21 b Me aa ann ae a ii ke a Re State 22 6 L ASSEMbDIV diema dee DE 23 O G
36. stage 24 volt thermostat well localized or two dry contacts of a centralized control system Redundant gas valves used are adjusted at the factory to maintain a capacity of 100 at high fire and 60 at low fire The design of the main valve maintains a stable pressure in manifold with a range of inlet pressure ranging from 7 w c to 14 w c MULTIPLE STAGES Si and Sib Option A multi stage device has a solenoid valve installed at each burner Each of the solenoids is controlled individually allowing a reduction in the capacity of the unit by the number of tubes on and the setting of the two stage valve This type of modulation control is required in an application of fresh air and is suggested for comfort heating in a specific application laboratory museum senior citizens residence For this option a temperature controller with relay outputs is included to start levels individually The ignition sequence will be in the following order a heating demand the first burner turns on 60 40 Sib of the burner capacity followed by number 2 3 4 till the maximum of tubes are themselves 60 of capacity When the burners are lit on low fire and heating demand increases the control signal increases the main valve increases the pressure of the manifold tubing to feed the burners at 100 capacity Instantly the controller will reduce the amount of burners fed in order to have a linear increased heating capacity For example If a 120 Si model with 4 bu
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