LAARS NeoTherm NTV (Sizes 150–850 MBTU/h) - Install and Operating Manual - Manual (Page 2)

LAARS Heating Systems
Section 1 -
General Information
1.1 Introduction ....................................................... 1
1.2
Model Identification ........................................... 1
1.3 Appliance Overview .......................................... 2
1.4 Warranty ........................................................... 6
1.5 Unpacking ......................................................... 6
1.6 Dimensions ....................................................... 6
Section 2 -
Locating the Appliance
2.1 General Information .......................................... 8
2.2 Locating Appliance for Correct Vent Distance
from Outside Wall or Roof Termination ............. 8
Section 3 -
Venting and Combustion Air
3.1 Combustion Air ................................................. 9
3.2 Venting ............................................................ 10
3.3 Locating Vent & Combustion Air Terminals ..... 12
3.4 Common Vent Test ......................................... 15
Section 4 -
Gas Supply and Piping
4.1 Gas Supply and Piping ................................... 15
Section 5 -
Pump Requirements
5.1 NeoTherm Boiler Flow and
Head Requirements ........................................ 16
5.2 NeoTherm Water Heater
Flow and Head Requirements ........................ 16
Section 6A -
Water Connections - NTH Boiler
6A.1 NTH System Piping: Hot Supply
Connections .................................................... 17
6A.2 NTH Cold Water Make-Up .............................. 17
6A.3 Condensate Drain ........................................... 18
6A.4 Freeze Protection ........................................... 18
6A.5 NTH Suggested Piping Schematics ............... 18
6A.6 Recognized Chemicals ................................... 18
Section 6B -
Water Connections - NTV Water Heater
6B.1 NTV Water Quality .......................................... 26
6B.2 Piping Requirements ...................................... 26
6B.3 Cold Water Make-Up ...................................... 27
6B.4 Condensate Drain ........................................... 27
6B.5 Freeze Protection ........................................... 27
6B.6 NTV Suggested Piping Schematics ................ 27
6B.7 NTV Suggested Pumps .................................. 27
Section 7-
The User Interface
7.1 About the User Interface ................................. 30
7.2 Navigating through the User Interface ............ 30
7.3 The Home Display .......................................... 31
7.4 Customizing your Home Display .................... 31
7.5 Entering/Changing Control Settings ............... 31
Section 8A -
Quick Start Menu
8A.1 Quick Start Menu ............................................ 35
Section 8B -
Basic Installation and Wiring
8B.1 Installation Warnings ...................................... 36
8B.2 Main Power Connections ................................ 37
8B.3 Pump Connections and Operation ................. 37
Section 8C -
Detailed Setup Instructions and Diagrams
8C.1 24 VAC Transformer with Integral
Circuit Breaker ................................................ 38
8C.2 Hydronic Heating Demand ............................. 38
8C.3 Anti-Short-Cycle ............................................. 38
8C.4 Outdoor Air Temperature Sensor .................... 38
8C.5 Outdoor Reset ................................................ 38
8C.6 Warm Weather Shutdown ............................... 40
8C.7 Domestic Hot Water........................................ 40
8C.8 Cascading Lead/ Lag Operation ..................... 42
8C.9 Hydronic Heating Using External
Modulation Control ......................................... 45
8C.10 Optional Field Connections ............................ 46
8C.11 Connections to a
Building Automation System ........................... 46
8C.12 Ladder and Wiring Diagrams .......................... 47
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