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Safety Information        5

CAUTION

 

Do not attempt to repair or replace any part of the boiler, 

unless it is specifically recommended in this manual. 

For all other service, contact an authorized technician or 

licensed professional. Improper adjustments, alterations, 

service, or maintenance may lead to property damage, 

personal injury, or death and will void your warranty.

 

Do not operate the boiler if you feel something is wrong 

with it.

 

Doing so may result in product damage or personal injury.

 

Do not allow children to operate or access the boiler.

 

Doing so may result in product damage or personal injury.

 

Do not attempt to change the DHW water temperature 

while the boiler is being used.

 

Doing so may result in personal injury.

 

Do not turn on the boiler unless the water and gas 

supplies are fully opened.

 

Doing so may damage the boiler.

 

Do not turn on the water if the cold water supply shut-

off valve is closed.

 

Doing so may damage the boiler.

 

Do not use this boiler for anything other than its 

intended purpose, as described in this manual.

 

Do not remove the front cover unless the power to the 

boiler is turned off or disconnected.

Failure to do so may result in electric shock.

 

When servicing the controls, label all wires prior to 

disconnecting them.

Failure to do so may result in wiring errors, which can lead to 

improper or dangerous operation.

 

Do not use unapproved replacement or accessory parts.

 

Doing so may result in improper or dangerous operation 

and will void the manufacturer’s warranty.

 

Do not place anything in or around the vent terminals, 

such as a clothes line, that could obstruct the air flow in 

or out of the boiler.

 

This boiler has been approved for use in the USA and 

Canada only.

 

Using the boiler in any other country will void the 

manufacturer’s warranty.

 

Should overheating occur or the gas supply fail to shut 

off, turn off the manual gas valve to the appliance.

WARNING

 

Shut off the gas supply if the boiler is damaged.

Have your installer or plumber show you the location of the 

gas shut off valve and demonstrate how to close the valve. 

If the boiler is damaged as a result of overheating, fire, flood, 

or any other reason, close the manual shut off valve and do 

not operate the boiler again until it has been inspected by a 

qualified technician.

 

Do not store or use gasoline or other flammable liquids 

near this boiler.

Doing so may result in fire or explosion.

 

Do not place combustibles, such as newspapers or 

laundry, near the boiler or venting system.

Doing so may result in a fire.

 

Do not place or use hair sprays, spray paints, or any other 

compressed gases near the boiler or venting system, 

including the vent termination.

Doing so may result in fire or explosion.

 

Do not operate the boiler with the front cover opened.

 

Doing so may result in fire or carbon monoxide (CO) 

poisoning, which may result in property damage, personal 

injury, or death.

 

Do not operate this boiler without proper venting.

 

Doing so may result in fire or carbon monoxide (CO) 

poisoning, which may result in property damage, personal 

injury, or death. Inspect the vent termination and air intake 

supply annually to ensure proper operation of the boiler. 

Turn off and discontinue use of the boiler if any of the vent 

pipes, vent elbows, or intake pipes are damaged in any way, 

separated at a joint, or show evidence of corrosion, rusting, 

or melting.

 

Do not touch the power cord or internal components of 

the boiler with wet hands.

Doing so may result in electric shock.

 

Do not make any electrical connections before turning 

off the electrical power supply at service entrance panel.

Doing so may result in severe personal injury or death.

Summary of Contents for NCB-180

Page 1: ...navienamerica com For warranty service always contact Technical Support first Contact the technician or professional who installed your boiler Contact a licensed professional for the affected system f...

Page 2: ...fire or explosion may result causing property damage personal injury or death Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHATTO D...

Page 3: ...9 3 3 Viewing Basic Information 10 3 4 Resetting the Boiler 11 4 Maintaining the Boiler 12 4 1 Cleaning the Boiler 12 4 2 Draining the Boiler 12 4 3 Cleaning the Inlet Water Filter DHW side 13 4 4 Cle...

Page 4: ...tment C Use only your hand to push in or turn the gas control knob Neverusetools Iftheknobwillnotpushinorturnbyhand don t try to repair it call a qualified service technician Force or attempted repair...

Page 5: ...130 F 55 C 10 seconds 120 F 49 C 10 minutes 100 F 37 C very low scald risk DANGER HOT BURN To prevent burns Use the lowest operating temperature setting necessary to provide comfortably hot water If...

Page 6: ...ler in any other country will void the manufacturer s warranty Should overheating occur or the gas supply fail to shut off turn off the manual gas valve to the appliance WARNING Shut off the gas suppl...

Page 7: ...side the boiler automatically detects the temperature and if necessary initiate a safety heating cycle to prevent internal equipment damage due to freezing temperatures Short Circuit Protection Any sh...

Page 8: ...important information required for the boiler s operation Refer to the following table for detailed information a Space heating mode f S Supply water control Indicates space heating mode operation In...

Page 9: ...t the values required for the boiler s operation such as space heating and DHW supply temperatures Refer to the following table for detailed information k Diagnostics button n Up button For installers...

Page 10: ...er settings menu The boiler will retain your settings during a power outage 3 1 Turning the Boiler On or Off To turn the boiler on or off press the Power button for 0 3 seconds MODE When the power is...

Page 11: ...he water temperature read To prevent burns on page 4 carefully Water above 120 F can cause instant scalding severe burns or death To adjust the water temperature 1 Make sure that all hot water faucets...

Page 12: ...to the Troubleshooting section of this manual or contact Technical Support at 1 800 519 8794 Display Description psi O R S R Outdoor reset curve Not in use 1 Finned tube baseboard 2 FAN coil 3 Cast ir...

Page 13: ...Boiler You will need to drain either both the space heating side and domestic hot water DHW side or one side only before performing maintenance tasks such as cleaning the inlet water filter or to pre...

Page 14: ...require draining and open a purge valve to drain the space heating side Open all domestic hot water faucets completely to drain the water heating side The water that remains in the plumbing lines will...

Page 15: ...rinse it with clean running water cold 4 Reinsert and tighten the strainer 5 Fill the boiler and check for proper operation 4 5 Cleaning the Air Intake Filter If the air intake filter becomes clogged...

Page 16: ...rew 10 Replace the front cover 11 Reconnect the power supply to the boiler 12 Press the Power button on the front panel to turn on the boiler 4 Remove the screw that secures the air intake filter the...

Page 17: ...t there is sufficient make up air to avoid such a situation and the owner is responsible for ensuring that protection against freezing is maintained To avoid freezing issues we strongly recommend the...

Page 18: ...e boiler Failure to perform the service and maintenance could result in damage to the boiler or system Failure to follow the directions in this manual and component literature could result in severe p...

Page 19: ...glycol test for proper concentration as recommended by manufacturer Excessive pressure rise indicates expansion tank sizing or performance problem 4 Inspect automatic air vents and air separators Remo...

Page 20: ...ignition flame detector electrode making sure gasket is in good condition and correctly positioned Checking the Ignition Ground Wiring 1 Check that the ground wire is in good condition and securely a...

Page 21: ...on the supply and return water lines 4 Connect one tube to the A valve and place the free end in the bucket 5 Connect one of the tubes to the circulation pump outlet and the return water line at the B...

Page 22: ...fer to 3 2 Adjusting the Temperature on page 9 Check for cross plumbing between the cold and hot water lines The water from the hot water faucet is too hot Is the set temperature set too high Check th...

Page 23: ...r open or short circuit Contact Technical Support at 1 800 519 8794 E351 Abnormal Auto feeder valve make up water Contact Technical Support at 1 800 519 8794 E352 High water pressure Contact Technical...

Page 24: ...al and shall be subject to Navien s schedule of approved labor allowances Warranty Exclusions Navien s Limited Warranty shall be void in the event of an occurrence of any of the following Improper ins...

Page 25: ...nited States and Canada Removal or alteration of the rating plate OtherTerms This Limited Warranty is subject further to the terms and conditions set forth herein and as may be further specified in th...

Page 26: ...Memo...

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