Lochinvar SNR200-100 用户手册

1.  Expansion tanks provide space for water to move in and 

out as the water expands due to temperature increase or 
contracts as the water cools.  Tanks must be approved for 
potable water systems.  See Section 5 - System Piping for 
suggested best location of expansion tanks.

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 - System 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 water 
heater 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 water heater 
until a new relief valve has been installed.

2.  After following the 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.

 WARNING

 WARNING

       

Installation & Service Manual

TM

1.  Remove the ignition and flame sense electrodes from the 

water heater heat exchanger access cover.

2.  Remove any deposits accumulated on the ignition/flame 

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

3.  Replace ignition/flame sense electrode, making sure gasket 

is in good condition and correctly positioned.

1.  Inspect water heater 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 water heater wiring, making sure wires are in 

good condition and securely attached.

1.  Set the control module display to Parameter Mode and 

check all settings.  Adjust settings if necessary.  See Section 
1 of this manual for adjustment procedures.

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

if necessary.

1.  Start water heater 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.