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11

Operating the Boiler

2.  Rotate the Command dial (

) to the right to 

select the DHW temperature.

3.  Press the Command dial (

) to select the DHW 

temperature (

). The highlighted section will 

flash.

4.  Rotate the Command dial (

) to the right or 

left to increase or decrease the temperature.

5.  Press the Command dial (

) to confirm the 

new temperature.

6.  Press the Back button (

) to return to normal 

operation mode, or rotate the Command dial  
(

) to adjust other operation conditions.

You can adjust the temperature while the display is 
flashing. Once the display stops flashing, the current 
temperature setting is stored.

Note

 

Ɣ

Take note of the original DHW 
temperature in case you want to 
restore it to the default. 

 

Ɣ

The DHW temperature range is 86°F 
(30°C) to 140°F (60°C) with 120°F as 
the default setting.

 

Ɣ

The boiler will retain your settings 
during a power outage.

5.  Press the Back button (

) to return to normal 

operation mode, or rotate the Command dial  
(

) to adjust other operation conditions.

You can adjust the temperature while the 
highlighted section is flashing. Once the flashing 
stops, the current temperature setting is stored.

Note

 

Ɣ

The space heating temperature 
cannot be adjusted when the Outdoor 
Reset Control is used.

 

Ɣ

In case of outdoor reset sensor 
malfunction, the boiler will operate at 
this set temperature.

 

Ɣ

Take note of the original heating 
temperature in case you want to 
restore it to the default.

 

Ɣ

The default space heating supply 
water temperature range is 104°F 
(40°C, Absolute MIN) to 180°F (82°C, 
Absolute MAX).

 

Ɣ

The default space heating return 
water temperature range is 86°F 
(30°C, Absolute MIN) to 149°F (65°C, 
Absolute MAX).

 

Ɣ

You can adjust the temperature ranges 
in the parameter settings menu.

 

Ɣ

The boiler will retain your settings 
during a power outage.

3.2.2    Adjusting the DHW Temperature

To adjust the water temperature:

1.  In normal operation mode, rotate the Command 

dial (

). The space heating temperature (

) is 

highlighted on the screen.

Содержание NFC-250/200H

Страница 1: ...ur gas supplier call the fire department Installationandservicemustbeperformedbyaqualifiedinstaller serviceagencyorthegas supplier Theinstallationmustconformwithlocalcodesor intheabsenceoflocalcodes t...

Страница 2: ...On or Off 10 3 2 Adjusting the System Temperatures 10 3 3 Accessing Basic Menu Items 12 3 4 Resetting the Boiler 13 4 Maintaining the Boiler 14 4 1 Cleaning the Boiler 14 4 2 Draining the Boiler 14 4...

Страница 3: ...pliance does not have a pilot It is equipped with an ignition device which automatically lights the burner Do not try to light the burner by hand B BEFORE OPERATING smell all around the appliance area...

Страница 4: ...boiler with the front cover opened Doing so may result in fire or carbon monoxide CO poisoning which may result inpropertydamage personalinjury ordeath Do not operate this boiler without proper ventin...

Страница 5: ...o 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...

Страница 6: ...ater temperatures at or above 125 F 52 C can cause instant scalding severe burns or death Before you decide to change the temperature setting read the following charts carefully Water Temperature Time...

Страница 7: ...n Each boiler is specially grounded both internally and externally to protect against lightning strikes Carbon Monoxide Protection The boiler is designed to maintain a safe air to gas ratio and combus...

Страница 8: ...eeze mode Auto air purge Displayed when an auto air purge is being performed e Cascade Main mode Flashes when configuring a cascade system Turns on solid if the boiler is set as the Main unit in a cas...

Страница 9: ...for the boiler s operation such as space heating and DHW supply temperatures Refer to the following table for detailed information a Back button Return to the previous menu or screen b Mode button En...

Страница 10: ...the boiler on or off press the Power button When the power is on the boiler automatically enters normal operation mode and the boiler s operating conditions are displayed on the screen Note The boile...

Страница 11: ...on to return to normal operation mode or rotate the Command dial to adjust other operation conditions You can adjust the temperature while the highlighted section is flashing Once the flashing stops t...

Страница 12: ...ter Pressure Water pressure psi 17 Flame Value Flame detector AD value Flame On 8bit AD values equal to or lower than 70 Flame Off 8bit AD values equal to or higher than 175 18 Fan Target RPM Set fan...

Страница 13: ...xhaust temperature F 25 Outdoor Reset Outdoor reset status Enable Disable 26 Outdoor Reset Curve Outdoor reset curve load type displayed when the outdoor reset option 25 Outdoor Reset is enabled 1 Fin...

Страница 14: ...t it is not waterproof Keep it as dry as possible 4 2 Draining the Boiler You will need to drain the boiler under certain circumstances such as when the boiler is not used for an extended period of ti...

Страница 15: ...ded or as part of the annual maintenance To clean the air intake filter 1 Press the Power button on the front panel to turn off the boiler 2 Disconnect the power supply to the boiler 3 Unfasten the 4...

Страница 16: ...Place the filter assembly back into the boiler and secure it with the screw 9 Replace the front cover 10 Reconnect the power supply to the boiler 11 Press the Power button on the front panel to turn o...

Страница 17: ...boiler at the beginning of every heating season and or when there is a problem 4 4 Protecting the Boiler from Freezing CAUTION Damage due to freezing is not covered by the Navien limited warranty Fre...

Страница 18: ...severe personal injury death or substantial property damage The boiler should be inspected annually only by a qualified service technician In addition the maintenance and care of the boiler must be pe...

Страница 19: ...s Addressing the Reported Problems Inspect any problems reported by the owner and correct before proceeding Inspecting the Installation Area 1 Verify that boiler area is free of any combustible materi...

Страница 20: ...er place of disposal Otherwise severe personal injury may result If no water flows valve is inoperative Shut down the boiler until a new relief valve has been installed 2 After following the above war...

Страница 21: ...ted with water 3 hoses A water circulation pump 2 flush valves if not installed Note Before flushing the heat exchanger additional flush valves A and B must be installed on the near boiler piping incl...

Страница 22: ...and allow the solution to circulate through the boiler Refer to the manufacturer s literature for information about the circulation time 10 Rinse the cleaning solution from the boiler a Remove the fre...

Страница 23: ...Temperatures on page 10 Check for cross piping 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 the boiler s temperature s...

Страница 24: ...an motor Manual RESET E110 Abnormal air pressure Manual RESET E205 Abnormal operation heating supply thermistor Auto RESET E218 Abnormal operation heating return thermistor Auto RESET E278 Abnormal op...

Страница 25: ...peration Pre Heat Aquastat Alarm E762 Abnormal flue gas duct Vent pipe not properly inserted Auto RESET E773 Using the wrong gas Parameter RESET E777 Abnormal operation LWCO limit external device Auto...

Страница 26: ...eriod replacement of the Product or components may be authorized by Navien only Navien does not authorize any person or company to assume for it any obligation or liability in connection with the repl...

Страница 27: ...ncluding but not limited to installation in violation of applicable rules laws or building codes inadequate water quality condensate damage improper venting incorrect gas type water pressure absence o...

Страница 28: ......

Страница 29: ...er When you contact Technical Support please have the following information at hand Model number Serial number Date purchased Installation location and type Error code if any appears on the front pane...

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