Nagas DTHR Series Installation And Operation Manual Download

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DTHR-V9-2020

DTHR Series

For installation inside an

OEM air handler

INSTALLATION AND OPERATION MANUAL

1385, Lionel-Boulet blvd, Varennes,

Quebec, Canada, J3X1P7

Summary of Contents for DTHR Series

Page 1: ...DTHR V9 2020 21 DTHR Series For installation inside an OEM air handler INSTALLATION AND OPERATION MANUAL 1385 Lionel Boulet blvd Varennes Quebec Canada J3X1P7...

Page 2: ...cause serious injury death or property damages Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS o Do not t...

Page 3: ...ay HMI features 30 Run window 31 Level 1 Air Gas relation 32 Level 1 Alarm history 33 Level 2 Fan RPM auto tuning 34 Level 2 Signal supervision 35 Level 2 Step timer 36 PLC alarms 37 Flame safeguard a...

Page 4: ...nt Install the unit on a non combustible floor Allocate enough space around the unit for maintenance and around the combustion air intake and the inlet air hood to prevent harmful accumulation of snow...

Page 5: ...c a high pressure regulator must be installed at gas piping inlet The regulator must be suitable for modulation ratio of 40 1 to properly regulate gas pressure at low fire The regulator vent must be p...

Page 6: ...c kPa At maximum capacity In w c kPa In w c kPa MBH Kw 35 7 1 74 10 2 5 2 3 0 57 3 5 0 87 30 8 79 40 2 9 0 72 50 4 6 1 15 55 3 1 0 77 40 11 7 65 2 8 0 69 75 2 3 0 57 85 2 9 0 72 100 3 8 0 95 125 2 6...

Page 7: ...n manual DTHR V9 2020 See installation dimensions section for more details Unit dimensions Note The controls shown are on the left hand side of the unit for a right hand unit the drawing is mirrored a...

Page 8: ...21 2 26 26 Weight Lbs 380 383 423 475 476 560 582 652 647 726 Weight with options 451 454 503 566 564 670 692 762 773 852 Dim Metric mm A 1194 1194 1194 1334 1334 1422 1473 1549 1721 1721 B 1016 1016...

Page 9: ...ng on the model the flue vent connection diameter ranges from 6 to 10 inch The DTHR models are designed to operate effectively and safely with a positive stack category III type sealed single wall or...

Page 10: ...sibility to test for safety and functionality Horizontal discharge Step 1 Install the unit on an insulated floor Step 2 Install walls on each side see dimension table The walls must be in contact with...

Page 11: ...imension table The walls must be in contact with the guides on the support structure The walls must be insulated with 2 of high temperature insulation Step 3 Install the air baffle on the internal sid...

Page 12: ...is essential for the proper operation of the unit Improper positioning of the supply temperature sensor could result in high temperatures in the supply ducts a thermal protection shutdown the closing...

Page 13: ...en facing air stream Installation dimensions WARNING Improper installation adjustment alteration can cause serious injury death or property damages Note The controls shown are on the left hand side of...

Page 14: ...THR V9 2020 DTHR Vertical discharge Left hand control when facing air stream Note The controls shown are on the left hand side of the unit for a right hand unit the drawing is mirrored and dimensions...

Page 15: ...2 54 1 2 54 1 2 60 60 60 75 1 2 S 45 45 45 45 51 51 56 1 2 56 1 2 56 1 2 72 U 10 11 1 2 14 1 2 16 17 19 1 2 20 23 29 28 V 13 7 8 13 1 8 11 5 8 13 3 8 12 7 8 11 5 8 11 3 8 9 7 8 9 1 2 10 Dim Metric mm...

Page 16: ...for remaining wiring connections Main 120V 60Hz 1ph ac power supply see wiring diagram for current On Off contact for heating demand This heating demand must be wired in series with at least one of th...

Page 17: ...h screen interface 2 Programmable logic controller PLC 3 Heating element 4 Input Output expansion module I O 5 Ignition transformer 6 High limit protection set at 160oF 7 Flame safeguard module 8 Ther...

Page 18: ...off valve 1 7 Valve proving system with IRI option 8 Main gas safety shutoff valve 2 9 Modulating gas valve actuator 10 Modulating gas valve 11 Low fire orifice bypass 12 Test firing gas valve 13 High...

Page 19: ...standards 1 2m 4 to the side U S A standards Vent outlet from another service 0 9m 3 Building or adjacent wall or parapet 1 8m 6 might have to be increased for horizontal discharge Sidewalk or parkin...

Page 20: ...s these units can produce condensate This corrosive liquid must be treated and drain correctly with provision to prevent freezing It is very important not to orient the vent outlet towards a fresh air...

Page 21: ...20 Installation and operation manual DTHR V9 2020 Recommended roof top Flue Vent Exhaust and or Combustion Air Duct Recommended wall horizontal Flue Vent Exhaust and Combustion Air Duct Concentric kit...

Page 22: ...of straight sections of the flue vent to the equivalent length of all the elbow pipes used A 90 degree elbow pipes has an equivalent length of 3m 10 and a 45 degree angle elbow pipes has an equivalent...

Page 23: ...ntification section for location Ensure that the gas inlet pressure complies with the following value Standard inlet pressure Natural Gas Propane LP Minimum 7in w c 1 74 kPa 11in w c 2 74 kPa Maximum...

Page 24: ...xcess air Compare the manifold pressure with the name plate indication Adjust the gas regulator if needed to obtain the right value At high fire you should have a combustion reading of 3 5 O2 approx a...

Page 25: ...st is above 2 3 VDC the safety verification is enabled Step 2 Safety verification S20 S25 The burner air proving switch PAB1 is verified during the two following tests 1 Activation of the air proving...

Page 26: ...begin Modulating gas valve and the blower follow the request signal value According to the gas valve position the blower modulates following an air gas relation curve pre set into the PLC memory to a...

Page 27: ...ximately in order to purge the heat exchanger After the post purge delay the sequence returns to the standby step But if an alarm is active a manual reset is required on the HMI touch screen When the...

Page 28: ...slot Not used 5 LEDs I O states Digital inputs relay outputs and fast output LEDs 6 USB mini B port For terminal connection to a computer for programming need SoMachine program 7 Clip on lock For 35m...

Page 29: ...ules 16 Protective cover Cover for SD card Run Stop switch and USB mini B programming port 17 Locking hook Hook not included PLC status LEDs description 1 System status LEDs Label Function Color Descr...

Page 30: ...le TM3 3 Used PLC I Os Input Description I0 Blower Speed RPM I5 Start Stop Burner request by others I6 Burner air proving switch Alarm I7 Flue vent back pressure Alarm I8 Burner On status proof relay...

Page 31: ...manual DTHR V9 2020 The following diagram describes the structure of different levels in the HMI Display HMI features Home page Run window Level 1 menu Level 3 menu Password protected Level 4 menu Pa...

Page 32: ...ollowing a linearization curve and the air blower will follow the gas valve feedback position with the correspondent value determined in the fan modulation table 1 Heat Heating demand signal VDC 2 Gas...

Page 33: ...Graphic Fan modulation curve for each 0 5 V of gas valve position The vertical rectangle shows the position you have selected for modification If the unit is running vertical and horizontal dashed lin...

Page 34: ...codes The number 1 being the most recent code 1 Code The alarm code number is related to an alarm type first digit and in which steps it s happened second digit See PLC Alarms section for details 2 E...

Page 35: ...is possible only if the demand contact I5 on the PLC is open not activated At the end of the process a confirmation will be asked see item 4 2 Fan command in 3 rpm Fan rpm feedback during the process...

Page 36: ...valve modulation signal demand first row and actual position feedback signal second row Expressed in volt V Gas demand can be different to Heat command 3 Air Burner air blower modulation demand first...

Page 37: ...tive In this example the prepurge step is now at 6 seconds on a 40 seconds timer 1 Actual count Timer count in real time sec 2 Maximum Maximum value of the count In some situation it s a goal or it s...

Page 38: ...n the flame safeguard Flame safeguard in alarm see next section Fan feedback lost Combustion air fan feedback signal is missing during 40 Burner ignition step 4 41 Flame stabilization step 5 42 Modula...

Page 39: ...e Trouble code Trouble description alarms Red Lights OPR CTRL Air flow PTFI Flame Alarm 6 Frequency noise O O 7 Pilot flame failure PTFI O 19 Burner flame failure MTFI O O 21 Lockout Interlock open O...

Page 40: ...temperature maximum temperature safety switch opens at 160 F Verify the temperature sensor position need to read average temperature Verify burner modulation all controls and temperature signal Verify...

Page 41: ...40 Installation and operation manual DTHR V9 2020 Typical wiring diagram TYPICAL WIRING DIAGRAM...

Page 42: ...41 Installation and operation manual DTHR V9 2020 TYPICAL WIRING DIAGRAM...

Page 43: ...tch in OFF position 2 Check fan belts and adjust or replace if necessary 3 Check the condition of filters and replace if necessary 4 Make sure nothing partially or completely obstructs the air inlet a...

Page 44: ...y Semi Annual Annual Make sure there are no flammable materials near the unit Make sure that the combustion air inlet and flue vent are not blocked or obstructed Verify flame state and combustion Veri...

Page 45: ...d damages caused by improper matching or applications of the product or the product s components e damages caused by failing to provide routine and proper maintenance or service to the product f expen...

Page 46: ...ent Top air baffle installed Low limit installed Condensate drain Note ______________________________________________________________________________________________ Start up Flame signal _________ VD...

Page 47: ..._____________________________________________________________ ___________________________________________________________________________________________________ ______________________________________...

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