Laars NTH, Installation And Operation Instructions Manual

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LAARS Heating Systems
Section 1 -
General Information
1.1 Introduction ....................................................... 1
1.2 Model Identification ........................................... 1
1.3 Appliance Overview .......................................2-7
1.4 Dimensions, Indoor Models .............................. 8
1.5 Dimensions, Outdoor Models ......................... 10
1.6 Warranty ......................................................... 12
1.7 Unpacking ....................................................... 12
Section 2 -
Locating the Appliance
2.1 General Information ........................................ 13
2.2 Locating Appliance for Correct Vent Distance
from Outside Wall or Roof Termination ........... 13
Section 3 -
Venting and Combustion Air
3.1 General Venting .............................................. 14
3.2 Combustion Air ............................................... 14
3.3 Venting ............................................................ 16
3.4 Locating Vent & Combustion Air Terminals ..... 18
3.5 Common Vent Test ......................................... 21
Section 4 -
Gas Supply and Piping
4.1 Gas Supply and Piping ................................... 22
Section 5 -
Pump Requirements
5.1 NeoTherm Boiler Flow and
Head Requirements ........................................ 23
5.2 NeoTherm Water Heater
Flow and Head Requirements ........................ 23
Section 6A -
Water Connections - NTH Boiler
6A.1 NTH System Piping: Hot Supply
Connections .................................................... 24
6A.2 NTH Cold Water Make-Up .............................. 24
6A.3 Condensate Drain ........................................... 25
6A.4 Freeze Protection ........................................... 25
6A.5 NTH Suggested Piping Schematics ..........25-31
6A.6 Recognized Chemicals ................................... 25
Section 6B -
Water Connections - NTV Water Heater
6B.1 NTV Water Quality .......................................... 33
6B.2 Piping Requirements ...................................... 33
6B.3 Cold Water Make-Up ...................................... 34
6B.4 Condensate Drain ........................................... 34
6B.5 Freeze Protection ........................................... 34
6B.6 NTV Suggested Piping Schematics ................ 34
6B.7 NTV Suggested Pumps .................................... 34
Section 7 –
Electrical and Wiring Diagrams
7.1 Installation Warnings ....................................... 37
7.2 Main Power Connections ................................ 37
7.3 Pump Connections and Operation .................. 37
7.4 Hydronic Heating Using External Mod ............ 37
7.5 Optional Field Connection ............................... 39
7.6 Connections to a Building Automation Sys ..... 39
7.7 Ladder and Wiring Diagrams .......................... 39
Table of Contents
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