HTP RGH-199 - Table of Contents

lp-590 Rev. 003 Rel. 007 Date 4.2.19
4
Table of Contents
Part 1 - General Safety Information 5
A. Operation and Installation Warnings 5
B. Improper Combustion 6
C. Gas 6
D. When Servicing the Water Heating System 6
E. Water Chemistry Requirements 6
F. Freeze Protection 7
G. Water Temperature Adjustment and Scalding 7
H. High Elevation Installations 7
Part 2 - Before You Start 8
A. What’s in the Box 8
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 Conned or Unconned 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 Specications 13
J. Wall-Mounting 16
Part 4 - Water Piping 17
A. General Plumbing Guidelines 17
B. Backow Preventer 18
C. Potable Expansion Tank 18
D. Piping the Water Heater 18
E. Applications 18
F. Circulator Sizing 26
G. Pressure Relief Valve 27
H. Filling the Heater 28
Part 5 - Venting 28
A. General 28
B. Approved Materials for Exhaust Vent and Intake Pipe 29
C. Additional Requirements for Installation in Canada 30
D. Exhaust Vent and Intake Pipe Location 31
E. Exhaust Vent and Intake Pipe Sizing 32
F. Tightening Water Heater Collar to Exhaust Vent and Intake Pipe
32
G. Exhaust Vent and Intake Pipe Installation 32
H. Applications 33
1. Direct Vent Installation of Exhaust and Intake 33
2. Venting Through an Existing System 36
3. Power Venting, Indoor Combustion Air in Conned or Unconned
Space 37
Part 6 - Installing the Condensate Drain 38
Part 7 - Connecting Electrical Service 39
A. Wiring 39
B. Dip Switches 39
C. Wiring a Cascaded System 40
Part 8 - Gas Connections 45
A. Gas Pipe Sizing Tables 45
1. Gas Pipe Sizing 45
2. Natural Gas Pipe Sizing 45
3. LP (Liquid Propane) Gas Pipe Sizing 45
B. Gas Connection Requirements 45
C. Additional Precaution for Excess Flow Valve (EFV) 46
D. Checking Gas Pressure at the Water Heater for Proper
Operation 46
E. Setting and Verifying the Combustion Setting 46
Part 9 - Controls 47
A. Control and Display Overviews 47
B. Start-Up Sequence 47
C. Changing the DHW Set-Point 48
D. Changing the Time 48
E. Lock Function 48
F. Status Display 49
G. Installer Mode 50
H. Setting Up a Cascaded System 51
I. Using Recirculation Modes - Step 1 52
J. Recirculation Functions - Using Recirculation Modes - Step 2 53
1. Smart Auto-Learn Recirculation Function 54
2. Pro1, Pro2, Pro3, and PULS Recirculation Function 54
Part 10 - Troubleshooting 55
A. Error Code 55
B. Error Tree Analysis 59
1. Flame Detection 59
2. Air Pressure Switch Detection 59
3. Recirculation / Inlet / DHW / Operating Temperature / Exhaust Sensors
60
C. Suggested Corrective Actions 60
Part 11 - Installation Checklist 62
Part 12 - Maintenance 64
Part 13 - Replacement Parts 67
Limited Warranty for RGH Water Heaters 72
Notes 74
Customer Installation Record Form 75
From the Uniform Plumbing Code 2000 - Section 510 -
Protection From Damage
1. Water heaters generating a glow, spark or ame capable of igniting
ammable vapors may be installed in a garage, provided the pilots,
burners or heating elements and switches are at least eighteen (18)
inches (457 mm) above the oor level.
2. Where such water heaters installed within a garage are enclosed in
a separate, approved compartment having access only from outside
of the garage, such water heaters may be installed at oor level
provided the required combustion air is also taken from the exterior
of the garage. Fuel burning water heaters having sealed combustion
chambers need not be elevated.
3. All water heaters installed in areas where they may be subjected to
mechanical damage shall be suitably guarded against such damage
by being installed behind adequate barriers or by being elevated or
located out of the normal path of a vehicle using any such garage.
4. In seismic zones 3 and 4, water heaters shall be anchored or
strapped to resist horizontal displacement due to earthquake
motion. Strapping shall be at points within the upper one-third (1/3)
and lower one-third (1/3) of its vertical dimensions. At the lower
point, a minimum distance of four (4) inches (102 mm) shall be
maintained above the controls with the strapping.
5. An water heater supported from the ground shall rest on level
concrete or other approved base extending not less than three (3)
inches (76 mm) above the adjoining ground level.
6. When an water heater is located in an attic, attic-ceiling assembly,
oor-ceiling assembly, or oor-suboor assembly where damage
may result from a leaking water heater, a watertight pan of corrosion
resistant materials shall be installed beneath the water heater with
a minimum three-quarter (3/4) inch (20 mm) diameter drain to an
approved location.