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Installation Manual - Contents
Accessories Included with the Water Heater -------------------------- 3
Optional Accessories --------------------------------------- 4
Specifications -------------------------------------------------------------------- 5
Components & Dimensions Key Components : NR-A ----------------------------------- 6
Key Components : NP-A ----------------------------------- 7
Dimensions : NR-A,NP-A ---------------------------------- 8
Key Components : NR -------------------------------------- 9
Key Components : NP -------------------------------------- 10
Dimensions : NR, NP --------------------------------------- 11
Warnings Installation Warnings ---------------------------------------- 12
Rating Plate Getting Started ------------------------------------------------ 13
Check Rating Plate ------------------------------------------ 14
Location Selection Locating the Water Heater -------------------------------- 15
Mounting the Unit to the Wall ----------------------------- 16
Plumbing Plumbing and Water Connection Guidelines --------- 17
Water Piping Guidelines ----------------------------------- 18
Pressure Relief Valve -------------------------------------------------------------------- 19
Condensate Disposal Disposal of Condensate ----------------------------------- 20
Condensate Drain & Cleaning --------------------------- 21
Gas Piping Gas Piping Guidelines ------------------------------------- 22
Gas Supply Line Pressures ------------------------------- 22
Gas Piping Sizing Chart ----------------------------------- 23
Gas Pressure Testing Measuring Inlet Gas Pressure ---------------------------- 24
Venting Warning -------------------------------------------------------- 25
Venting Guidelines ------------------------------------------- 25
Contaminated Make-up Air Will Damage the Unit ---- 28
Exhaust Vent Pipe Materials ------------------------------- 28
Venting Clearances ------------------------------------------ 29
Allowable Vent Lengths ------------------------------------- 30
Vent Configuration Options -------------------------------- 31
Electrical Connections -------------------------------------------------------------------- 36
Remote Cotroller Installation -------------------------------------------------------------------- 37
PCB Board Settings -------------------------------------------------------------------- 38
Cascade Connection and Set-up Procedures ----------------------------------------------- 39
DIP Switch Settings -------------------------------------------------------------------- 45
Installation Checklist -------------------------------------------------------------------- 49
Factory Setting of DIP Switch ------------------------------------------------------------------ 56
Completing the Install -------------------------------------------------------------------- 56
Wiring Diagram -------------------------------------------------------------------- 57
Ladder Diagram -------------------------------------------------------------------- 61
Components Diagram & Parts List ------------------------------------------------------------- 65