Raypak 503-2003, Installation And Operating Instructions Manual

Page: 8 / 58

SECTION B: General Safety
6
Time/Temperature Relationships
in Scalds
The following chart details the 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.
Water Temp. Time to Produce Serious Burn
120°F More than 5 minutes
125°F 1-1/2 to 2 minutes
130°F About 30 seconds
135°F About 10 seconds
140°F Less than 5 seconds
145°F Less than 3 seconds
150°F About 1-1/2 seconds
155°F About 1 second
Table courtesy of The Shriners Burn Institute
Table B: Time to Produce Serious Burn
The temperature of the water in the heater can be regu-
lated by using the Raypak Modulating Temperature
Control. To comply with safety regulations, the control
is set at 120°F when shipped from the factory (Mode 3
default setting for Tank Target).
To adjust the water temperature, follow the instruction
for the operation of the control starting on page 28 of
this manual. The control is shown below for identifica-
tion purposes only. (See Fig. 4.)
Fig. 4: Modulating Temperature Control
CAUTION:
Hotter water increases the risk of scald-
ing! There is a hot water scald potential if the
thermostat is set too high.