Lochinvar SNA285-125, SNA500-125 Ratings, Installation & Service Manual, High Altitude, Notes

TM

Installation & Service Manual

Ratings

Model Number		CSA
	Input Modulation Btu/hr
				Water Content	Water	Gas	Vent/Air Size
Note: Change “N” to				Gallons	Connections	Connections
“L” for L.P. gas models.		(Note 2)
	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 Maximum allowed working pressure is located on the rating plate.

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.

UNIT EQUIPPED FOR

HIGH ALTITUDE

3,000 FT. TO 12,000 FT.

Figure A High Altitude Label Location

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