Paloma PTG-74X User Manual

AP13592 (06/04)
FOR YOUR SAFETY!
— Do not store or use gasoline or other
flammable vapors or liquids or other
combustible materials in the vicinity of this or
any other appliance. To do so may result in an
explosion or fire.
— WHAT TO DO IF YOU SMELL GAS
● Do not try to light any appliance.
● Do not touch any electrical switch; do not
use any phone in your building.
● Immediately call your gas supplier from a
neighbor’s phone. Follow the gas
supplier’s instructions.
● If you cannot reach your gas supplier, call
the fire department.
● Do not return to your home until authorized
by the gas supplier or fire department.
— Improper installation, adjustment,
alteration, service or maintenance can cause
property damage, personal injury, or death.
Refer to this manual. Installation and service
must be performed by a qualified installer,
service agency or the gas supplier.
!
WARNING: If the information in these instructions is not followed exactly,
a fire or explosion may result causing property damage, personal injury or death.
!
The purpose of this manual is twofold: one, to provide the installer with
the basic directions and recommendations for the proper installation and
adjustment of the water heater; and two, to the owner–operator, to
explain the features, operation, safety precautions, maintenance and
troubleshooting of the water heater. This manual also includes a parts
list.
It is imperative that all persons who are expected to install, operate or
adjust this water heater read the instructions carefully so they may
understand how to perform these operations. If you don’t understand
these instructions or any terms within it, seek professional advice.
Any questions regarding the operation, maintenance, service or
warranty of this water heater should be directed to the seller from whom
it was purchased. If additional information is required, refer to the
section on If You Need Service.
Do not destroy this manual. Please read carefully and keep in a safe
place for future reference.
Recognize this symbol as an indication of Important Safety
Information!
California Proposition 65 Warning: This product contains
chemicals known to the State of California to cause cancer, birth
defects or other reproductive harm.
!
!
Use & Care Manual
With Installation Instructions for the Installer
Printed in Japan
Tankless Water Heater
D
E
S
I
G
N
C
E
R
T
I
F
I
E
D
®
Warning: This water heater is not suitable
for use in manufactured (mobile) homes!
!
31-51482
Residential Outdoor Gas
199,900 BTU Max Input

Paloma PTG-74X Specifications

General

Brand	Paloma
Model	PTG-74X
Category	Water Heater
Language	English

Summary

Introduction and Safety Warnings

Mobile Home Incompatibility Warning

Explicit warning that this water heater is unsuitable for manufactured or mobile homes.

Gas Leak Detection and Safety Actions

Provides critical steps to take if a gas leak is detected, emphasizing safety precautions.

Critical Safety Information

Proper Installation Safety Concerns

Highlights dangers of improper installation, especially regarding carbon monoxide and air supply.

Flammable Materials and Vapors Hazard

Warns of extreme danger from flammable liquids and vapors near the appliance.

Water Temperature Safety

Scalding Risk from High Temperatures

Details the severe burn risk from water over 125°F, especially for vulnerable individuals.

Gas Supply Safety

Gas Type Compatibility and Conversion Warning

Warns against converting between natural gas and LP, stating it's unsafe and voids certification.

LP Gas Properties and Handling Caution

Gas Leak Detection and Emergency Response

Provides comprehensive steps for detecting leaks and responding safely to emergencies.

General Safety and Installation Compliance

California Earthquake Bracing Mandate

User Safety Precautions and Servicing

Installation Location and Clearances

Outdoor Installation Requirement

Specifies that the water heater must be installed outdoors only, not indoors or in confined spaces.

Clearances from Combustible Construction

Mounting and Water Connections

Water Heater Mounting Requirements

Water Supply Connection Guidelines

Outlines requirements for water quality, temperature, pressure, and piping materials for connections.

Water Supply and Safety Valve Installation

Pressure Relief Valve Installation Requirements

Details the mandatory installation of a pressure relief valve, including specifications and discharge line setup.

Gas Supply and Testing Procedures

Gas Supply Line and Shut-off Valve

Specifies gas supply line materials, installation of shut-off valves, and sediment traps.

Gas Leak Testing Methodology

Explains the procedure for testing gas connections for leaks using a soapy water solution.

Gas Supply System Pressure Testing

Outlines critical steps for safely pressure testing the gas supply system before operation.

Ventilation and Location Considerations

Flue Terminal Placement Guidelines

Electrical Connections

Electrical Wiring and Grounding Requirements

Details the need for qualified electricians, proper grounding, and an ON/OFF switch for the 120VAC power.

Water Heater Wiring Diagram

Installation Checklist

Pre-Installation and Final Checks

Initial Operation and Safety

Pre-Operation Safety Checks

Lists essential safety warnings and checks required before turning on the water heater for the first time.

Step-by-Step Operating Instructions

Operating the Water Heater

Operational Safety Precautions

Water Temperature Setting and Scald Prevention

Explains how to set the water temperature and the risks associated with excessively hot water.

Water Temperature Adjustment

Remote Control Temperature Management

Draining and Freeze Protection

Water Heater Draining Instructions

Freeze Protection Methods

Troubleshooting Common Issues

No or Low Hot Water Diagnosis

Water Temperature Too High or Low

Error Code Guide

Interpreting and Resolving Error Codes

Provides a table of error codes, their causes, and recommended actions for troubleshooting.

Service and Support Information

Contacting for Technical Assistance