Filter
Top Products
Ratings
Notes:
1. Shield water heaters require special gas venting. Use
only the vent materials and methods specified in the
Shield Installation and Service Manual.
2. Standard Shield water heaters are equipped to operate
from sea level to 4,500 feet only with no adjustments.
The water heater will de-rate by 4% for each 1,000 feet
above sea level up to 4,500 feet.
3. High altitude Shield water heaters are equipped to
operate from 3,000 to 12,000 feet only with no field
adjustments. The water heater will de-rate by 2% for
each 1,000 feet above 3,000 feet. High altitude models
are manufactured with a different control module for
altitude operation, but the operation given in this
manual remains the same as the standard models. A
high altitude label (as shown in FIG. A) is also affixed
to the unit.
7
Maximum allowed working pressure is located on the rating plate.
Model Number
Note: Change “N” to
“L” for L.P. gas models.
CSA
Input Modulation Btu/hr
(Note 2)
Water Content
Gallons
Water
Connections
Gas
Connections
Vent/Air Size
Min Max
(Note 1)
SNR150-100 30,000 - 150,000 92 1-1/2" 1/2" 3"
SNR200-100 40,000 - 199,999 93 1-1/2" 1/2" 3"
SNA285-125 57,000 - 285,000 124 2" 3/4" 4"
SNA400-125 80,000 - 399,999 125 2" 1" 4"
SNA500-125 100,000 - 500,000 126 2" 1" 4"
NOTICE
Figure A High Altitude Label Location
UNIT EQUIPPED FOR
3,000 FT. TO 12,000 FT.
HIGH ALTITUDE
Installation & Service Manual
TM