Crestron electronic 2 Manual De Usuario

        

Installation & Operation Manual

1.  Remove the ignition and both flame sense electrodes 

from the burner plate.

2.  Remove any deposits accumulated on the ignition/

flame sense electrodes using sandpaper.  If the 
electrodes cannot be cleaned satisfactorily, replace 
with new ones.

3.  Replace ignition/flame sense electrodes, making 

sure the gaskets are in good condition and correctly 
positioned.

1.  Inspect boiler ground wire from the heat exchanger 

access cover to ground terminal strip.

2.  Verify all wiring is in good condition and securely 

attached.

3.  Check ground continuity of wiring using continuity 

meter.

4.  Replace ground wires if ground continuity is not 

satisfactory.

1.  Inspect all boiler wiring, making sure wires are in 

good condition and securely attached.

1.  Navigate to the Setup Screen and check all settings.  

See Section 1 of the Crest Service Manual.  Adjust 
settings if necessary.  See Section 1 of the Crest 
Service Manual for adjustment procedures.

2.  Check settings of external limit controls (if any) and 

adjust if necessary.

1.  Start boiler and perform checks and tests specified 

in Section 9 - Start-up.

2.  Verify cold fill pressure is correct and that operating 

pressure does not go too high.

1.  Inspect flame through observation windows.

2.  If the flame is unsatisfactory at either high fire 

or low fire, remove and clean the burner.  Clean 
the burner thoroughly using a vacuum cleaner 
or compressed air.  Do not use compressed air to 
clean the burner if cleaning is performed inside a 
building.

 

• Shut down the boiler:

 

  

- Follow the “To Turn Off Gas to Appliance” instructions 

  

   for the boiler in Section 9 - Startup.

 

  

- Do not drain the boiler unless it will be exposed to 

  

  freezing temperatures.  If using freeze prevention fluid 

  

   in system, do not drain.

 
3.  Allow time for the boiler to cool to room temperature if it has 

been firing.

4.  Remove the top access panel to remove the gas/air manifold 

assembly.

5.  Remove the nuts securing the burner to the burner mounting 

plate.  Remove the burner (FIG. 11-2).

6.  When replacing the burner, ensure gaskets are in good condition 

and positioned correctly (FIG. 11-2).

7.  When securing the burner, be sure to tighten the nuts, but DO 

NOT over-tighten. Tighten the nuts to a torque setting of no 
more than 6.2 ft.-lbs.  When securing the burner mounting plate 
be sure to tighten the nuts, but DO NOT over-tighten.  Tighten 
the nuts to a torque setting of no more than 15.5 ft.-lbs.

BURNER
ASSEMBLY

MANIFOLD
GASKET

AIR/GAS
MANIFOLD

INSULATION

BURNER
GASKET

BURNER PLATE

FIBERBOARD

1.  At high fire of each combustion system, the flame signal shown 

on the display should be at least 10 microamps.

2.  A lower flame signal may indicate a fouled or damaged flame 

sense electrode.  If cleaning the flame sense electrodes does 
not improve, ground wiring is in good condition, and ground 
continuity is satisfactory, replace the flame sense electrode.

3.  See Section 3 - Troubleshooting in the Crest Service Manual for 

other procedures to deal with low flame signal.