LP-605 Rev. 000 Rel. 009 Date 8.16.18
4
Table of Contents
Part 1 - General Safety Information 4
A. Operation and Installation Warnings 4
B. Improper Combustion 6
C. Gas 6
D. When Servicing the Water Heating System 6
E. Water Chemistry Requirements 6
F. Freeze Protection 6
G. Water Temperature Adjustment and Scalding 6
H. High Elevation Installations 7
Part 2 - Before You Start 7
A. What’s in the Box 7
B. Optional Equipment 8
Part 3 - Prepare the Water Heater Installation 9
A. Locating the Water Heater 9
B. Leveling 10
C. Clearances for Service Access 10
D. Residential Garage and Closet Installations 10
E. Exhaust Vent and Intake Pipe 11
1. Direct Vent of Exhaust and Intake 11
2. Power Venting, Indoor Combustion Air in Conned or Unconned Space
11
F. Carbon Monoxide Detectors 11
G. Prevent Combustion Air Contamination 12
H. Removing a Heater from a Common Vent System 12
I. Technical Specications 13
J. Installing the Water Heater Stand, Exhaust Pipe Clamp, and
Condensate Trap 16
1. Assembling the Water Heater Stand 16
2. Floor Mounting the Water Heater 16
3. Installing the Exhaust Pipe Clamp and Condensate Trap 17
Part 4 - Water Piping 17
A. General Plumbing Guidelines 17
B. Backow Preventer 18
C. Potable Expansion Tank 18
D. Piping the Water Heater 18
E. Applications 19
F. Temperature and Pressure Relief Valve 23
G. Filling the Heater 23
H. Draining the Water Heater 23
Part 5 - Venting 24
A. General 24
B. Approved Materials for Exhaust Vent and Intake Pipe 25
C. Additional Requirements for Installation in Canada 25
D. Exhaust Vent and Intake Pipe Location 26
E. Exhaust Vent and Intake Pipe Sizing 27
G. Exhaust Vent and Intake Pipe Installation 27
H. Applications 28
1. Direct Vent Installation of Exhaust and Intake 28
2. Venting Through an Existing System 31
3. Power Venting, Indoor Combustion Air in Conned or Unconned Space
32
Part 6 - Installing the Condensate Drain 34
Part 7 - Connecting Electrical Service 36
A. Wiring 36
B. Dip Switches 36
Part 8 - Gas Connections 38
A. Gas Pipe Sizing Tables 38
1. Gas Pipe Sizing 38
2. Natural Gas Pipe Sizing 38
3. LP (Liquid Propane) Gas Pipe Sizing 38
B. LP Gas Conversion 39
C. Gas Connection Requirements 40
D. Additional Precaution for Excess Flow Valve (EFV) 40
E. Checking Gas Pressure at the Water Heater 40
F. Setting and Verifying the Combustion Setting 41
Part 9 - Controls 42
A. Start-Up 42
B. How to Use the Control Interface 42
C. How to Set the Water Heater for High Output Operation 42
D. Temperature Setting Procedure 42
E. Water Temperature Adjustment and Scalding 43
F. Diagnostic Button Function 44
Part 10 - Troubleshooting 44
A. Error Code Screens 44
B. Suggested Corrective Actions 45
Part 11 - Installation Checklist 47
Part 12 - Maintenance 49
Part 13 - Replacement Parts 53
Limited Warranty for RGH Floor Mounted Water Heaters 57
Notes 59
Customer Installation Record Form 60
Part 1 - General Safety Information
This water heater is approved for indoor installations only and is
not intended for use as a pool heater. Clearance to combustible
materials: 0” top, bottom, sides, and back. Heater must have room
for service: 2” front, 2” left and 3” right sides, 12” top, 2” back are
minimum recommended service clearances. (A combustible door
or removable panel is acceptable front clearance. A 3” minimum
clearance must be provided from the appliance front cover to the
removable panel or combustible door.) This water heater has been
approved for closet installation and installation on combustible
ooring. Install the water heater in a location where temperature
and pressure relief valve discharge or a leak will not result in damage
to the surrounding area. If such a location is not available, install an
auxiliary catch pan. The appliance is rated Category IV (pressurized
vent, likely to form condensate in the vent) and requires a special
vent system designed for pressurized venting. Use only Category IV
vent systems.
Installer - Read all instructions in this manual before installing.
Perform steps in the given order.
User - This manual is for use only by a qualied heating installer
/ service technician. Have this water heater serviced / inspected
annually by a qualied service technician.
FAILURE TO ADHERE TO THE GUIDELINES ON THIS PAGE
CAN RESULT IN SUBSTANTIAL PROPERTY DAMAGE, SEVERE
PERSONAL INJURY, OR DEATH.
NOTE: Obey all local codes. Obtain all applicable permits before
installing the water heater.
NOTE: Install all system components and piping in such a manner
that does not reduce the performance of any re rated assembly.
A. Operation and Installation Warnings
To avoid serious injury or death, read, understand, and follow all of
the precautions listed here.
Vapors from ammable liquids will explode and can cause a re,
resulting in personal injury or death. The water heater has a burner
that can come on at any time and ignite vapors. DO NOT use or
store ammable liquids around the water heater.
Improper venting can cause a build-up of carbon monoxide.
Breathing carbon monoxide can result in brain damage or death.
DO NOT operate the water heater unless it is properly vented to
the outside and has an adequate fresh air supply for safe operation.
Inspect the exterior exhaust gas outlet port and fresh air inlet port
on a regular basis to ensure they are functioning properly.
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