Lochinvar SNA285-125 Manuale Utente

The Shield water heater gas manifold 
and controls met safe lighting and other 
performance  under  tests  specified  in        
ANSI Z21.10.3 – latest edition.

Failure to keep water heater area clear and 
free of combustible materials, gasoline, 
and other flammable liquids and vapors 
can result in severe personal injury, death, 
or substantial property damage.

•  Local, state, provincial, and national codes, laws, 

regulations, and ordinances.

•   National Fuel Gas Code, ANSI Z223.1 – latest edition.
•   National Electrical Code.
•   For Canada only:  B149.1 Installation Code, CSA C22.1 

Canadian Electrical Code Part 1 and any local codes.

1.  Check for nearby connection to:

• Water piping
• Venting connections
• Gas supply piping
• Electrical power

2.  Locate the appliance so that if water connections should 
 

leak, water damage will not occur. When such locations 

 

cannot be avoided, it is recommended that a suitable 

 

drain pan, adequately drained, be installed under the 

 

appliance. Under no circumstances is the manufacturer 

 

to be held responsible for water damage in connection 

 

with this appliance, or any of its components.

3.  Check area around the water heater. Remove any 
 

combustible materials, gasoline and other flammable 

 liquids.

4.  The Shield water heater must be installed so that gas 

control system components are protected from dripping 
or spraying water or rain during operation or service.

 WARNING

Clearances from combustible materials
1.  Hot water pipes—at least 1/4" from combustible 

materials.

2.  Vent pipe – at least 1" from combustible materials.
3.  See FIG.’s 1-1 and 1-2 on page 9 for other clearance 

minimums.

Clearances for service access
1.  See FIG.’s 1-1 and 1-2 on page 9 for recommended 
 

service clearances.  If you do not provide the minimum 

 

clearances shown, it may not be possible to service the 

 

water heater without removing it from the space.

This appliance requires a special venting 
system. The vent connection to the 
appliance must be made with the CPVC 
pipe section installed in the appliance. 

 

The field provided vent fittings must 
be cemented to the CPVC pipe section. 
Use only the vent materials, primer and 
cement specified in this manual to make 
the vent connections. Failure to follow 
this warning could result in fire, personal 
injury, or death.

For closet and alcove installations as 
shown in FIG.’s 1-1 and 1-2, CPVC or 
stainless steel vent material must be used 
inside the structure. The ventilating air 
openings shown in  FIG.’s 1-1 and 1-2 are 
required for this arrangement. Failure to 
follow this warning could result in fire, 
personal injury, or death.

 WARNING

 WARNING

 WARNING

       

Installation & Service Manual

TM

A closet is any room the water heater is installed in which 
is less than 455 cubic feet for SNR150-100 and SNR200-
100 models and 671 cubic feet for the SNA285-125 through 
SNA500-125 models.

An alcove is any room which meets the criteria for a closet 
with the exception that it does not have a door.

Example:  Room dimensions = 6 feet long, 6 feet wide, and       
9 foot ceiling = 6 x 6 x 9 = 324 cubic feet. This would be 
considered a closet for a Shield Water Heater.

This appliance is certified as an indoor 
appliance.  Do not install the appliance 
outdoors or locate where the appliance will 
be exposed to freezing temperatures or to 
temperatures that exceed 100°F.
Do not install the appliance where the 
relative humidity may exceed 93%.  Do not 
install the appliance where condensation 
may form on the inside or outside of the 
appliance, or where condensation may fall 
onto the appliance.
Failure to install the appliance indoors 
could result in severe personal injury, 
death, or substantial property damage.