Navien NPE-240A Installation Manual

2 Contents
1. Safety Information 3
2. About the Water Heater
5
2.1 Items Included 5
2.2 Accessories
5
2.3 Specifications
6
2.4 The Front Panel
7
2.5 Components
8
2.6 Dimensions
11
2.7 Rating Plate
13
3. Installing the Water Heater 14
3.1 Choosing an Installation Location 14
3.2 Mounting the Water Heater to the Wall
15
3.3 Connecting the Gas Supply
16
3.4 Connecting the Water Supply
20
3.5 Connecting the Condensate Drain
26
3.6 Venting the Water Heater
28
3.7 Connecting the Power Supply
35
3.8 Setting the DIP Switches
35
4. Installing a Cascading System 37
4.1 Connecting Water Supplies 37
4.2 Connecting the Communication Cables
38
5. Appendixes 40
5.1 Gas Conversion 40
5.2 Technical Data
46
5.3 Wiring Diagram
49
5.4 Ladder Diagram
51
5.5 Component Assembly Diagrams and Parts Lists
53
5.6 Installation Check list
65
5.7 Navien ComfortAir+ Add-on Controller Kit (Optional)
67
5.8 Navien On-Demand Control Kit (Optional)
68
5.9 Requirements for the State of Massachusetts
69
Contents

Navien NPE-240A Specifications

General

Type	Tankless
Fuel Type	Natural Gas or Propane
Energy Factor	0.97
Energy Efficiency	97%
Voltage	120V
Ignition Type	Electronic
Maximum Input	199, 900 BTU/h
Water Connection Size	3/4"
Gas Connection Size	3/4"
Warranty	15-year on heat exchangers, 5-year on parts, 1-year on labor
Dimensions	17.3" W x 13.2" D x 27.4" H