Winter / Summer Optional Kit

4
POTABLE WATER TEMPERATURE ADJUSTMENT
Table 2 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.
Figure 3 – Scald Warning
IMPORTANT DECISIONS REQUIRED BEFORE INSTALLATION
SIZING
1. Boiler Heating Capacity – The indirect-fired water heater will provide the rated performance only if used
in conjunction with a heat source with a heating capacity (Boiler Output) at least as much as the minimum
noted in Table 1. If the heat source has less capacity, the output of the tank will be reduced. To determine
the approximate reduction in output from the tank, use the following formula:
New Rating = (Continuous Draw Rating) x
For example, what would the 140°F Continuous Draw Rating be if a Solar Single-wall 75-gallon indirect-fired
heater were installed with a heat source having a Boiler Output Capacity of 175,000 BTU/h?
DANGER
Hotter water increases the risk of scald injury. Scalding may occur within 5 seconds at a setting of 140°F
(60°C). Water temperature over 125°F (52°C) can cause severe burns or death from scalds. Children,
disabled and the elderly are at the highest risk of being scalded. Please feel the water before bathing or
showering.
WARNING
SCALDING
This water heater can deliver scalding temperature water at any faucet in the system. Be careful
whenever using hot water to avoid scalding injury. By setting the thermostat on this water heater to
obtain an increased water temperature, you may create the potential for scald injury. To protect
against injury, you should install an ASSE approved thermostatic mixing valve (a device to limit the
temperature of water to protect against scald injury via mixing hot and cold water supply) in the
water system. This valve will reduce point of discharge temperature in branch supply lines. This
water heater was shipped with an ASSE approved thermostatic mixing valve. Install this valve
according to the directions in the mixing device container. DO NOT OPERATE THIS WATER
HEATER WITHOUT AN ASSE APPROVED THERMOSTATIC MIXING DEVICE. If this water
heater was shipped without an ASSE approved thermostatic mixing valve, contact the manufacturer.
New Boiler Output Capacity
Listed Boiler Output Capacity
APPROXIMATE
TIME/TEMPERATURE
RELATIONSHIPS IN SCALDS
120°F More than 5 minutes
125°F
1 ½ 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 ½ seconds
155°F
About 1 second
Table 2 – Scald Relationships