Nagas DT Series, Installation, Operation And Maintenance Manual

Page 1: ...ww nagasinnovation com INDIRECT GAS FIRED DUCT FURNACE INSTALLATION OPERATION AND MAINTENANCE MANUAL FOR INDOOR OR OUTDOOR INSTALLATIONS Gas Unit Heaters Gas Packaged Heaters Gas Utility Heaters And G...

Page 2: ...uctions o If you cannot reach your gas supplier call the fire department Installation and service must be performed by a qualified installer service agency or the gas supplier THIS INSTRUCTION MANUAL...

Page 3: ...r maintenance that are important but not related to personal injury or property damage Before starting the installation of the unit read understand and follow all the instructions given in this manual...

Page 4: ...______________________________________________________ ADDRESS ___________________________________________________________ PHONE ___________________________________________________________ EMAIL _____...

Page 5: ...SPECIFICATIONS 12 4 INSTALLATION GUIDELINES 13 4 1 GENERAL 13 4 2 TYPICAL ARRANGEMENT 14 4 3 INSTALLATION 15 4 4 LIFTING 15 4 5 MOUNTING 16 4 6 UNPACKAGING 17 4 7 ELECTRICAL OR CONTROL SERVICE CONNEC...

Page 6: ...SEQUENCE 34 13 4 TROUBLESHOOTING CHECK LIST 35 14 HEATER MAINTENANCE 37 15 START UP REPORT 38 NOTICE The features illustrations and description in this document were to our knowledge accurate at the t...

Page 7: ...e is required under the heater Allow sufficient space on both sides of the heater for maintenance and allow sufficient space on the air inlet hood side to prevent snow accumulation and do not block th...

Page 8: ...n for gas heating units CSA B149 1 ANSI Z223 1 NFPA 54 to the electrical code CSA22 1 NFPA 70 and to local laws rules and regulations All the electrical installation located inside or outside of this...

Page 9: ...om wet ground dew or rain Do not store where the equipment could be physically damaged Make sure that all protective coverings that were provided for shipping are not damaged and are properly installe...

Page 10: ...y way for incidental consequential or special damages however caused such as but not limited to loss of productivity damages caused by delays loss of profits and management time In order to obtain rep...

Page 11: ...r installation in air ducts or in air handling unit made by original equipment manufacturers OEM of listed heating equipment in cabinet It must be mounted on the positive side of the circulating air b...

Page 12: ...83 18 1 15432 37037 7285 17483 250 3125 911 2500 729 15 1 19290 46296 9106 21854 300 3750 1093 3000 874 15 1 23148 55556 10927 26225 350 4375 1275 3500 1020 18 1 27006 64815 12748 30596 400 5000 1457...

Page 13: ...will measure the average duct temperature field testing may be required to find the optimal position The installation must be adjusted to obtain a temperature rise within the range specified on the un...

Page 14: ...e or Twin DWDI blowers with diffuser plate and horizontal arrangement Do not use SWSI blower Single or multiple plenum blower can be used in any configurations For application with high air flow Tempe...

Page 15: ...he roof or in a horizontal arrangement through the wall or a combination of both The heater should be attached to the roof curb or supporting structure with screws bolts or any other appropriate faste...

Page 16: ...adequate steel beam Refer to the shop drawing for mounting information 2 Roof curb mounting Roof curbs are fabricated of heavy gauge load bearing galvanized steel and must be fully insulated after ins...

Page 17: ...built with unit casing and floors designed to prevent water from penetrating the building through the installed equipment All penetrations through the unit walls must be caulked and sealed to prevent...

Page 18: ...hases power supply check for the correct rotation of all motors and fans If the rotation is incorrect reverse the rotation at the incoming power only All electrical conduit outlets in the control pane...

Page 19: ...5 to 75 N A 3 4 NPT 85 to 175 N A 3 4 NPT 200 to 350 1 2 NPT 1 NPT 400 to 500 3 4 NPT 1 1 2 NPT Table 4 Vent sizes NOTES 1 Table 3 should not be used to size the gas supply line 2 If gas pressure exce...

Page 20: ...ulator 6 Automatic safety shut off valve 7 Automatic safety shut off valve 8 Manual ignition cock 9 1 8 NPT diameter test port 10 Piping union 11 Modulating valve OPTIONS 12 Low gas pressure switch re...

Page 21: ...0 300 350 400 500 500 Table 6 Inlet gas pressure Note Consult factory or rating plate for propane gas inlet and manifold pressures 9 HEATER SHUTDOWN 9 1 EXTENDED SHUTDOWN When the heater is shut down...

Page 22: ...om 6 to 14 inches The heater is designed to operate effectively and safely against a positive pressure of 0 25 in w c with a positive stack category IV type corrosion resistant single wall or double w...

Page 23: ...ith the National Fuel Gas Code ANSI Z223 1 NFPA 54 or the Natural Gas and Propane Installation Code CSA B149 1 Local codes always supersede the above provisions Take all necessary precautions to avoid...

Page 24: ...ere the condensation may accumulate Cover the flue vent on its entire length with thermal liner material to prevent condensation formation while the burner is operating If the room temperature is main...

Page 25: ...for each unit The installation of two units onto one same exhaust system is forbidden and dangerous A repression of combustion gas of one of the devices could migrate towards the second and cause comb...

Page 26: ...26 DT Series Installation manual V4_2022 Figure 5 Recommended wall horizontal Flue Vent Exhaust and Combustion Air Duct Concentric kit Figure 6 Recommended wall vertical Flue Vent Exhaust...

Page 27: ...ny interlock or safety switches under any circumstances Proper commissioning of this equipment is the responsibility of the installing contractor It is recommended that an air balance be completed bef...

Page 28: ...5 in w c pressure gauge on the test port located at burner inlet downstream of the modulating valve butterfly valve see figure 8 Figure 8 Burner pressure test port location Model C Ensure that all th...

Page 29: ...detector In that case the UV tube must be placed in the same support used to install the flame rod 11 3 PILOT ADJUSTMENT Turn ON main electrical disconnect and turn control panel selector to BURNER p...

Page 30: ...specified in table 2 is obtained by adjusting the gas pressure regulator of the burner Figure 11 Gas pressure regulator NOTE Turning the adjustment screw clockwise increases the gas pressure and burne...

Page 31: ...ow fire adjustment Run burner to LOW FIRE position Take combustion readings and adjust to measure 0 04 CO 400 ppm maximum NOTE It is normal to have high O2 reading Mark the position Make adjustments f...

Page 32: ...flue gas from the heat exchanger 8 Burner stops and is now ready for a new heat demand Note For general guidance purpose only always refer to the control sequence and wiring diagram provided with the...

Page 33: ...hem 13 2 STATUS OF WARNING LIGHTS FIREYE The table below lists the most common and important codes concerning unit operation Refer to manufacturer for other codes not listed in this table NOTE A compl...

Page 34: ...emand and the pilot control valve coil as well as the ignition transformer is energized 3 The FLAME light is ON when the flame safeguard relay detects a pilot flame signal for 10 seconds 4 The MAIN li...

Page 35: ...valves are opened 5 Check condition of the flame rod ceramic replace if necessary 6 Check the flame safeguard amplifier replace if necessary 7 Refer to the manufacturer Flame failure MTFI CODE 19 FIR...

Page 36: ...he temperature switch 5 Consult factory Ground fault CODE 54 FIREYE 1 Check grounding of the heater frame and flame safeguard relay 2 Check for ground default in electrical wiring between the heater a...

Page 37: ...d outlet of the heater Check combustion and flame quality Check that all safety controls are operational Check the operation of the high temperature limit thermostat Ensure that there are no gas leaks...

Page 38: ...ir openings High limit adjustment Flue vent Top air baffle installed Condensate drain Neutralizer kit Note ____________________________________________________________________ START UP Flame signal __...

Page 39: ...________________________________________________________________________ ______________________________________________________________________________________ ________________________________________...

Page 40: ...ies Installation manual V4_2022 1385 Lionel Boulet blvd Varennes QC J3X 1P7 Canada Direct line 1 888 514 8007 Tel 438 338 1101 Fax 450 649 8756 Email service nagasinnovation com Website www nagasinnov...