Installation / Operation Instruction Manual

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Table 7 details the approximate relationship of water temperature and
time with regard to scald injury and may be used as a guide in
determining the safest water temperature for your applications.
For the most energy efficient operation, adjust the aquastat for the
minimum water temperature necessary to meet domestic hot water
needs. Refer to Figure 8. Use a small flat screwdriver to rotate the
temperature dial through the hole directly below the temperature
indication window. The temperature setting is aligned with the notch in
this window. IT IS NOT NECESSARY TO REMOVE THE COVER TO
ADJUST THE TEMPERATURE SETTING. THE AQUASTAT COVER
SHOULD NEVER BE REMOVED WITHOUT ELECTRICITY BEING
FIRST DISCONNECTED.
CAUTION
Before adjusting the aquastat, turn off all power supplied to
the indirect-fired water heater.
Figure 7 - Scald Warning
APPROXIMATE
TIME/TEMPERATURE
RELATIONSHIPS IN SCALDS
120°F (49°C)
More than 5 minutes
125°F (52°C)
1 ½ to 2 minutes
130°F (54°C)
About 30 seconds
135°F (57°C)
About 10 seconds
140°F (60°C)
Less than 5 seconds
145°F (63°C)
Less than 3 seconds
150°F (66°C)
About 1 ½ seconds
155°F (68°C)
About 1 second
Table 7 – Scald Relationships