Crestron electronic 3 Manual De Usuario

        

Installation & Operation Manual

1.  Visually inspect the entire flue gas venting system and air 

piping for blockage, deterioration or leakage.  Repair any 
joints that show signs of leakage. Verify that air inlet pipe 
is connected and properly sealed.

2.  Verify that boiler vent discharge and air intake are clean 

and free of obstructions.

Failure to inspect for the above conditions 
and have them repaired can result in 
severe personal injury or death.

1.  Verify all system components are correctly installed and 

operational.

2.  Check the cold fill pressure for the system.  Verify it is 

correct (must be a minimum of 12 psi (82.7 kPa)).

3.  Watch the system pressure as the boiler heats up (during 

testing) to ensure pressure does not rise too high. 

 

Excessive pressure rise indicates expansion tank sizing or 
performance problem.

4.  Inspect automatic air vents and air separators.  Remove 

air vent caps and briefly press push valve to flush vent.  
Replace caps.  Make sure vents do not leak.  Replace any 
leaking vents.

1.  Expansion tanks provide space for water to move in 

and out as the heating system water expands due to 
temperature increase or contracts as the water cools.  
Tanks may be open, closed or diaphragm or bladder 
type.  See Section 5 - Hydronic Piping for suggested best 
location of expansion tanks and air eliminators.

1.  Inspect the relief valve and lift the lever to verify flow.  

Before operating any relief valve, ensure that it is piped 
with its discharge in a safe area to avoid severe scald 
potential.  Read Section 5 - Hydronic Piping before 
proceeding further.

Safety relief valves should be re-inspected 
AT LEAST ONCE EVERY THREE YEARS, 
by a licensed plumbing contractor or 
authorized inspection agency, to ensure 
that the product has not been affected by 
corrosive water conditions and to ensure 
that the valve and discharge line have not 
been altered or tampered with illegally. 

 

Certain naturally occurring conditions 
may corrode the valve or its components 
over time, rendering the valve inoperative.  
Such conditions are not detectable unless 
the valve and its components are physically 
removed and inspected.  This inspection 
must only be conducted by a plumbing 
contractor or authorized inspection 
agency – not by the owner.  Failure to 
re-inspect the boiler relief valve as directed 
could result in unsafe pressure buildup, 
which can result in severe personal injury, 
death, or substantial property damage.

Following installation, the valve lever 
must be operated AT LEAST ONCE 
A YEAR to ensure that waterways are 
clear.  Certain naturally occurring 
mineral deposits may adhere to the valve, 
rendering it inoperative.  When manually 
operating the lever, water will discharge 
and precautions must be taken to avoid 
contact with hot water and to avoid water 
damage.  Before operating lever, check 
to see that a discharge line is connected 
to this valve directing the flow of hot 
water from the valve to a proper 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 warning directions, if the relief 

valve weeps or will not seat properly, replace the relief 
valve.  Ensure that the reason for relief valve weeping is 
the valve and not over-pressurization of the system due 
to expansion tank waterlogging or undersizing.

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