5
Important Note for the State of Massachusetts
Table of Contents
Safety Information .................................... 2
Important Note for the State
of Massachusetts
....................................... 4
General Information
.................................. 6
Included Items ................................................................... 6
Optional Accessories
........................................................ 6
Specifications......................................................................7
Rating Plate
......................................................................... 8
Warning label
..................................................................... 9
Dimensions
........................................................................10
Components
.....................................................................12
Installing the Water Heater .....................16
Installer Qualifications ................................................... 16
Compliance Requirements
..........................................16
Location
..............................................................................16
Connecting the Gas Supply .................... 19
Gas Pipe Sizing Tables....................................................19
Gas Piping
..........................................................................20
Inlet Gas Pressure
............................................................21
Connecting the Water Supply ................. 23
Water Piping ......................................................................23
Pressure Relief Valve
....................................................... 25
Condensate Drain
...........................................................25
Condensate Trap
..............................................................26
Installing a Vent
(For indoor installation only) .................. 27
Vent Type ............................................................................ 28
Vent Pipe Materials
.........................................................32
Vent Length
....................................................................... 32
Connecting the Vent Clip
.............................................33
Vent Termination
.............................................................33
Common Vent System Information
(Optional) ................................................. 36
About the Common Vent System ..............................36
Guideline for a Common Vent System.....................36
Determining the Length of Common
Vent System
.......................................................................38
Installing a Vent
(For common vent installation only) ......39
Install the Venting ...........................................................39
Install the Venting
...........................................................40
Maintenance
.....................................................................43
Common Vent Clearances
........................................... 45
Setting the DIP Switches ......................... 47
Connecting the Power Supply
................ 48
Setting the Program data
....................... 49
Self Calibration Mode
.............................. 51
Installation Checklist
............................... 53
Appendix
.................................................. 55
Gas Conversion ................................................................55
Cascade System
...............................................................59
Remote Controller - VD-100 (optional)....................61
Grundfos Comfort System
...........................................63
Wiring Diagram ........................................64
Ladder Diagram
....................................... 66
Component Assembly Diagrams and
Parts Lists
................................................. 67
Case Parts (VRP & VRS) ...................................................67
Flue Parts (VRP & VRS)
...................................................69
Water Parts (VRP Model)
............................................... 71
Water Parts (VRS Model)
...............................................73
Normal Operating Sequence ..................75
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