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. Shield water heaters will de-rate by 4% for each 1,000
feet above sea level.
Derate values are based on proper combustion
calibration and CO
2
’s adjusted to the recommended
levels.
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)
SWR125(N,L)
25,000 - 125,000
65
1-1/2"
1/2"
3"
SWR150(N,L)
30,000 - 150,000
90
1-1/2"
1/2"
3"
SWA150(N,L)
30,000 - 150,000
91
1-1/2"
1/2"
3"
SWR200(N,L)
39,800 - 199,000
91
1-1/2"
1/2"
3"
SWA200(N,L)
39,800 - 199,000
91
1-1/2"
1/2"
3"
SWR285(N,L)
57,000 - 285,000
91
1-1/2"
3/4"
4"
SWA285(N,L)
57,000 - 285,000
110
1-1/2"
3/4"
4"
SWR400(N,L)
79,800 - 399,000
110
1-1/2"
1"
4"
SWA400(N,L)
79,800 - 399,000
110
1-1/2"
1"
4"
SWA500(N,L)
100,000 - 500,000
110
1-1/2"
1"
4"
NOTICE
Installation & Service Manual
HLW
LOW LEAD CONTENT
