Lochinvar SNA285-125 Manuale Utente

Observe  a  minimum  of  one  inch  clearance  around  all           
un-insulated hot water pipes when openings around the pipes 
are not protected by non-combustible materials.  

2.  If this water heater is installed in a closed water supply 

system, such as the one having a backflow preventer in 
the cold water supply, provisions must be made to control 
thermal expansion.  DO NOT operate this water heater in 
a closed system without provisions for controlling thermal 
expansion.  Warranties do not cover damages from thermal 
expansion such as pressure bulges and/or deformities. 

 

Your water supplier or local plumbing inspector should be 
contacted on how to control this situation.  

3.  After installation of the water lines, open the main water 

supply valve and fill the water heater. While the water 
heater is filling, open several hot water faucets to allow air 
to escape from the water system. When a steady stream of 
water flows through the faucets, close them and check all 
water connections for possible leaks.

4.  Never operate the water heater without first being certain it 

is filled with water.      

This water heater can deliver scalding temperature water at any 
faucet in the system. Be careful whenever using hot water to 
avoid scalding injury. Certain appliances such as dishwashers 
and automatic clothes washers may require increased 
temperature water. By setting the thermostat on this water 
heater to obtain the increased temperature water required by 
these appliances, you may create the potential for scald injury. 
To protect against injury, you should install an ASSE approved 
mixing valve in the water system. This valve will reduce point of 
discharge temperature by mixing cold and hot water in branch 
supply lines.  Such valves are available from the local plumbing 
supplier.

 WARNING

Failure to install and maintain a new, 
listed temperature and pressure relief valve 
will release the manufacturer from any 
claim, which might result from excessive 
temperature and pressures.

Keep clear of the combination temperature 
and pressure relief valve discharge line 
outlet. The discharge may be hot enough 
to cause scald injury. The water is under 
pressure and may splash. 

Hydrogen gas can be produced in an 
operating water heater that has not 
had water drawn from the tank for a 
long period of time (generally two 
weeks or more). HYDROGEN GAS IS 
EXTREMELY FLAMMABLE. To prevent 
the possibility of injury under these 
conditions, we recommend the hot water 
faucet to be open for several minutes at the 
kitchen sink before you use any electrical 
appliance, which is connected to the hot 
water system. If hydrogen is present, there 
will be an unusual sound such as air 
escaping through the pipes as hot water 
begins to flow. Do not smoke or have an 
open flame near the faucet at the time it 
is open.

Basic steps are listed below along with illustrations on the 
following pages (FIG.’s 5-2 thru 5-4), which will guide you 
through the installation of the Shield water heater.

1.  BEFORE PROCEEDING WITH THE INSTALLATION, 

CLOSE THE MAIN WATER SUPPLY VALVE. After 
shutting off the main water supply, open a faucet to 
relieve the water line pressure to prevent any water 
from leaking out of the pipes while making the water 
connections to the water heater.  The COLD water inlet 
and HOT water outlet are identified on the water heater.  
Make the proper plumbing connections between the 
water heater and the plumbing system to the building.  
Install a shutoff valve in the cold water supply line.  

Water temperatures over 125°F (52°C) can cause severe 
burns instantly or death from scalds.
Children, disabled, and elderly are at highest risk of being scalded.

See instruction manual before setting the thermostat at the 
water heater.

Feel water before bathing or showering.

Temperature limiting valves are available, consult local plumbing 
supplier.

       

Installation & Service Manual

TM