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Installation and operation manual
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DTHR-V9-2020
Table of contents
Code and regulation .................................................................................................. 3
Specifications ............................................................................................................. 4
Gas supply .................................................................................................................. 4
Gas pressure adjustments ......................................................................................... 5
Unit Dimensions ........................................................................................................ 6,7
Installation guidelines ................................................................................................ 8,9,10,11
Installation dimensions .............................................................................................. 12,13,14
Electrical controls ...................................................................................................... 15
Components .............................................................................................................. 15,16,17
Flue vent and combustion air .................................................................................... 18,19,20,21
Start-up instruction ................................................................................................... 22,23
Control sequence ....................................................................................................... 24,25,26
Programmable logic controller features & I/O .......................................................... 27,28,29
Display (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 alarms............................................................................................. 38
Flame safeguard troubleshooting ............................................................................. 39
Typical wiring diagram ............................................................................................... 40,41
Start / stop recommendations .................................................................................. 42
Unit maintenance ...................................................................................................... 43
Warranty .................................................................................................................... 44
Start-up report ........................................................................................................... 45,46
The features, illustrations and description in this document were, to our knowledge,
accurate at the time they were printed. We reserve the right to change or stop
offering some feature as well as stop producing a given model without prior notice
and commitment on our part.
