Bradford White SW-2-40R-L Installation And Operating Manual page 24

Electrical Connections continued-
SEQUENCE OF OPERATIONS
1. Aquastat senses stored water temperature drops below desired
setting.
a. Domestic hot water priority only: Normally closed contacts
open to interrupt space heating.
2. Aquastat satisfied.
a. Aquastat contacts open, turning off domestic hot water
circulator and de-energizing relay.
b. Normally open contacts open, stopping boiler operation.
c. Domestic hot water priority only: Normally closed contacts
close, returning boiler control to space heating.
WATER TEMPERATURE ADJUSTMENT
1. The aquastat controls the maximum water temperature in the
tank. The differential is variable 5 to 30°F with a 160°F maximum
setting set by a factory installed stop. Set at the factory to a 5°F
differential and 120°F temperature.
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 aquastat 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 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. Such valves are available from the manufacturer
of this water heater or a local plumbing supplier. Please consult
with a plumbing professional.
WARNING
SCALDING
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