CHF2-I&S-02 - Installation and Service Manual - Hot Water Heating Boilers - Domestic Hot Water Supply Boilers - 300,000 and 990,000 - 2,070,000 - BTU Models

Oct 25, 2026

Installation and service manual for hot water heating boilers and domestic hot water supply boilers covering 300,000 and 990,000 through 2,070,000 BTU models. Provides warranty limits, emphasizes qualified installation, and explains common operating issues caused by improper system design rather than equipment defects. Includes owner instructions, safety warnings for fire or explosion risk, gas odor response steps, and receiving/checking procedures plus guidance on flooded units and replacement.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages60

Reading Time2 h 31 min

AccessFree to download

Warranty

Safety Warnings

Codes

Location

Clearances

Combustion/Ventilation Air

Conventional Venting

Sidewall Venting

Vertical DirectAire

Horizontal DirectAire

Outdoor Installations

Gas Supply

Gas Pressures & Piping

Manifold Pressure Adjustment

Water Connections

Relief Valve

Gas Valves

Electrical Requirements

Temperature Adjustment (Boiler)

Lighting Instructions

Ignition Module

Operation & Diagnostic Lights

Maintenance

Burner Cleaning

Heat Exchanger Inspection

Combustion Air Adjustment

Gas Train

Heating Boiler

Pump Requirements

Pressure Drop Chart

Primary/Secondary Piping

Low Temperature Systems

Three Way Valves

CHF2-i&s-02 INSTALLATION AND SERVICE MANUAL Hot Water Heating Boilers Domestic Hot Water Supply Boilers 300,000 and 990,000—2,070,000 • BTU Models Installation and service must be performed by a qualified service installer, service agency or the gas supplier. WARRANTY Factory warranty (shipped with unit) does not apply to units improperly installed or improperly operated. Experience has shown that improper installation or system design, rather than faulty equipment, is the cause of most operating problems. 1. Excessive water hardness causing a lime build up in the copper tube is not the fault of the equipment and is not covered under the manufacturer’s warranty. (See Water Treatment and Water Chemistry) 2. Excessive pitting and erosion on the inside of the copper tube may be caused by too much water velocity through the tubes and is not covered by the manufacturer’s warranty (See Boiler Flow Rate s and Temperature Rise for flow requirements) . SPECIAL INSTRUCTIONS TO OWNER | NOTE: | Retain this manual for future reference. | | --- | --- | This manual supplies information for the installation, operation and servicing of the appliance. It is strongly recommended that this manual be reviewed completely before proceeding with an installation. | WARNING: | | --- | | Improper Installation, Adjustment, Alteration, Service or Maintenance
can cause injury or property damage. Refer to this manual. For assistance or additional information consult a qualified installer, service agency or the gas supplier. | CHECKING EQUIPMENT Upon receiving equipment, check for signs of shipping damage. Pay particular attention to parts accompanying the boiler which may show signs of being hit or otherwise being mishandled. Verify total number of pieces shown on packing slip with those actually received. In case there is damage or a shortage, immediately notify the carrier. | DO NOT | Use this appliance if any part has | | --- | --- | | been under water. The possible damage to a flooded appliance can be extensive and present numerous safety hazards. Any appliance that has been underwater must be replaced. | | | WARNING: | | | --- | --- | | If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. | | | —WHAT TO DO IF YOU SMELL GAS— | | | • Do not try to light any appliance.
• Do not touch any electric switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbors phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department. | | | Installation and service must be performed by a qualified installer, service agency or the gas supplier. | | | CONTENTS | | --- | | Warranty ............................................................................... 1
Safety Warnings ................................................................... 1
Codes 2
Location 3
Clearances 4
Combustion/Ventilation Air 4
Conventional Venting ........................................................... 6
Sidewall Venting ................................................................... 10
Vertical DirectAire 12
Horizontal DirectAire 15
Outdoor Installations 17
Gas Supply ........................................................................... 18
Gas Pressures & Piping ....................................................... 19
Manifold Pressure Adjustment ............................. 21
Supply Pressure Measurement .............................. 22
Water Connections 23
Relief Valve 23
Gas Valves 24
Electrical Requirements ....................................................... 24
Temperature Adjustment (Boiler) ........................................ 25

FAQs

What voids the factory warranty for these boilers?

Factory warranty shipped with the unit does not apply to units improperly installed or improperly operated. Many operating problems stem from improper installation or system design rather than faulty equipment.

What are the key safety instructions if someone smells gas?

Do not try to light appliances and do not touch electrical switches or use phones. Call the gas supplier immediately from a neighbor’s phone and follow their instructions; if unreachable, call the fire department.

What should be done when equipment arrives with possible shipping damage or shortage?

Check for shipping damage, verify the total number of pieces with the packing slip, and if damage or shortage is found, notify the carrier immediately.

Oct 25, 2026

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