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Installation and operation manual

DTHR-V9-2020 

 
 
 

 

Subject to the terms and conditions hereof, during the first (1) year after the original installation of the 
product  or  eighteen  (18)  months  from  date  of  shipment  by  Nagas  Innovation  whichever  occurs first, 
we will supply free of charge any component part(s) of our product found to be defective in material or 
workmanship. Any replacement part(s) so supplied will be warranted for the balance of our product's 
original  warranty.  The  part(s)  to  be  replaced  must  be  available  in  exchange  for  the  replacement 
part(s).  Any  labor,  material,  transportation,  freight  or  other  charges  incurred  in  connection  with  the 
performance of this warranty will be the responsibility of the owner at the hourly rates and prices then 
in  force.  This  limited  warranty  is  only  applicable  to  new  and  unused  products  purchased from  us or 
from our authorized distributors, provided that our user instructions contained in our user guide have 
been  adhered  to.  You  recognize  and  understand  that  our  obligation  is  limited  to  replacing  the  part 
found to be defective and that you have no further recourse against us. 
 
In addition, if in the five (5) years that follows the initial installation of the device, the guarantor states 
that the heat exchanger perforated for reasons of improper assembly or of manufacturing defects, it 
will be replaced or repaired under the terms of the guarantee. 
 

THIS WARRANTY DOES NOT COVER

 
(a)  damages  caused  by  accident,  abuse,  negligence,  misuse,  riot,  fire,  flood  or  Acts  of  God  (b) 
damages  caused  by  operating  the  product  in  a  corrosive  atmosphere  (c)  damages  caused  by  any 
unauthorized  alteration  or  repair  of  the  system  affecting  the  product's  reliability  or  performance  (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) 
expenses incurred for erecting, disconnecting or dismantling the product (g) parts used in connection 
with  normal  maintenance,  such  as  filters  or  belts  (h)  products  no  longer  at  the  site  of  the  original 
installation  (i)  products  installed  or  operated  other  than  in  accordance  with  the  printed  instructions, 
with the local installation or building codes or with good trade practices (j) products lost or stolen. 
No  one  is  authorized  to  change  this  WARRANTY  or  to  create  for  us  or  on  our  behalf  any  other 
obligation  or  liability  in connection  with  our  product(s).  There  is  no  other  representation,  warranty  or 
condition in any respect, expressed or implied, made by or binding upon us other than the above, nor 
will we be liable in any 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  replacement  parts  under  this  product's  warranty,  contact  the  dealer  or  contractor 
who  installed  or  services  our  products.  Only  dealers  or  contractors  who  are  registered  with  us  are 
authorized  to  perform  this  warranty.  Should  the  dealer  or  the  contractor  need  assistance,  the 
authorized  agent  for  Nagas  is  available  for  support,  and  we,  at  Nagas,  in  turn,  support  our  agent's 
efforts. 
 

RETAIN THIS WARRANTY IN YOUR FILES FOR FUTURE REFERENCE 
 

This  warranty  is  expressly  given  and  accepted  in  lieu  of  any  and  all  other  warranties,  expressed  or 
implied,  including  without  any  limitation  any  warranty  of  merchantability  or  fitness  for  a  particular 
purpose. Some states/provinces do not allow for the disclaimers, limitations and exclusions identified 
above; as a result, they may not apply to you. 

 

 

Warranty 

 

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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