Dunkirk Hotline Indirect Water Heater - Manual (Page 6)

Page 6
SECTION II: GENERAL INFORMATION
LOCATION
The indirect coil tank water heater should be located in a central location to the piping
system, as close as practical to the boiler and in an area not subject to freezing temperatures.
Leave sufficient space for servicing and maintaining the heater.
Note: Long heating supply runs can lengthen recovery times.
WATER TREATMENT/FILTRATION
In areas where poor water conditions are suspected (i.e. lime, iron, and other minerals), it is
essential that the water be tested and appropriate action taken to prevent damage to the
indirect heater and ensure the quality of the water.
TEMPERATURE CONTROL
Water temperature from the heat source / boiler to the indirect coil tank water heater is
controlled by an immersion aquastat. This control operates the circulator, and provides
limited control for domestic hot water temperature. The proper temperature setting for
domestic hot water use is 120°F/49°C. If hotter water is required a tempering device or
anti-scald device must be installed at the domestic hot water outlet of the heater or at the
point of use.
CAUTION: Hot water in excess of 120°F
can cause scalding!
HotLine recommends a tempering valve or anti-scald valve be installed and used according
to the manufacturer’s directions to prevent scalding. Many state and local codes now require
installation of these devices. The tempering valve or anti-scald valve will ensure potable
water temperatures at the desired set point with a higher degree of accuracy.
IMMERSION CONTROL
HL30SK • HL40SK • HL50SK
HL80SK • HL119SK
APPROXIMATE
TEMPERATURE/TIME
RELATIONSHIPS TO
SCALDING
1 20 °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