LP-179 Rev. 6.7.16
4
D. Outdoor Reset 34
E. Test Mode 35
F. Maintenance 35
Part 9 - Shutdown 36
A. Shutdown Procedure 36
B. Vacation Procedure 36
C. Failure to Operate 36
D. Important Notice 36
Part 10 - Troubleshooting 36
A. Error Code 36
B. Heater Error 37
C. Lockout 37
Part 11 - Installation Checklist 41
Part 12 - Maintenance 42
Limited Warranty 46
Maintenance Notes 48
Customer Installation Record Form 49
Table of Contents
Part 1 - General Safety Information 4
A. Improper Combustion 5
B. Gas 5
C. When Servicing the Water Heating System 5
D. Heater Water 5
E. Freeze Protection 5
F. High Elevation Installations 5
G. Water Temperature Adjustment 5
Part 2 - Before You Start 6
A. What’s in the Box 6
B. How the Heater Operates 6
C. Optional Equipment 6
Part 3 - Prepare the Water Heater 6
A. Locating the Water Heater 7
B. Leveling 7
C. Clearances for Service Access 8
D. Residential Garage and Closet Installations 8
E. Exhaust Vent and Intake Pipe 8
1. Direct Vent of Exhaust and Intake 9
2. Indoor Combustion Air in Conned or Unconned Space 9
F. Prevent Combustion Air Contamination 9
G. Removing a Heater from a Common Vent System 9
H. Water Chemistry Requirements 10
Part 4 - Piping 14
A. Heater Plumbing 14
B. Auxiliary Connections 14
C. Backow Preventer 14
D. Potable Expansion Tank 14
E. Temperature and Pressure Relief Valve 14
F. Scalding 15
G. Filling the Heater 15
H. Applications 16
Part 5 - Venting and Condensate Removal 20
A. General 20
B. Approved Materials for Exhaust Vent and Intake Pipe 21
C. Additional Requirements for Installation in Canada 21
D. Exhaust Vent and Intake Pipe Location 22
E. Exhaust Vent and Intake Pipe Sizing 23
F. Longer Vent Runs 23
G. Exhaust Vent and Intake Pipe Installation 23
H. Applications 24
1. Direct Vent Installation of Exhaust and Intake 24
2. Venting Through an Existing System 26
3. Indoor Combustion Air in Conned or Unconned Space 27
I. Condensate Removal System 28
Part 6 - Wiring 29
A. Line Voltage Input 29
B. Line Voltage Condensate Output 29
C. Low Voltage Outdoor Sensor Input 29
D. Alarm Connections 29
E. Optional 0-10 Volt Building Control Signal 29
F. Internal Wiring Diagram 30
Part 7 - Gas Connections 31
A. Gas Piping 32
B. Gas Table 32
Part 9 - Start-Up Procedure 34
A. Operating Instructions 34
B. Overall Water Heater and Control Operation 34
C. Status Menu 34
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: 24” front and 12” sides are
minimum recommended service clearances. (A combustible
door or removable panel is acceptable front clearance.) This
water heater has been approved for closet installation and
installation on combustible ooring. Do not install directly
on carpeting. 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. 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.
DO NOT USE THIS WATER HEATER IF ANY PART HAS
BEEN SUBMERGED IN WATER. Immediately call a qualied
service technician. The water heater MUST BE replaced if it
has been submerged. Attempting to operate a water heater
that has been submerged could create numerous harmful
conditions, such as a potential gas leakage causing a re
and/or explosion, or the release of mold, bacteria, or other
harmful particulates into the air. Operating a previously
submerged water heater could result in property damage,
severe personal injury, or death.
NOTE: Water heater damage due to ood or submersion is
considered an Act of God, and IS NOT covered under product
warranty.
Altering any HTP, Inc. water heater with parts not
manufactured by HTP, Inc. WILL INSTANTLY VOID the
water heater warranty and could result in property damage,
personal injury, or death.
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