Bradford White 80A Manuel d'instructions Page 28

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Page 4
GENERAL INFORMATION
General Controls Layout
P
ressure
G
age
(optional)
Control Circuit
T
ransformer
Thermostat
Control
Heating Element
Time Delay
Sequencers
(optional)
Terminal strip
High Limit
(
ECO)
P
ower Circuit
F
use Blocks
T
erminal
Block
Control Circuit
Fuse Block
Contactors
High Limit
Immersion Bulb
T
hermostat
I
mmersion
Bulb
Heating
Element
Alarm
Horn
(optional)
A
larm
Horn Relay
(optional)
Low Water
L
evel Control
(optional)
Low Pressure
L
imit Switch
(optional)
H
igh Pressure
L
imit Switch
(
optional)
Contactor
Terminal connections to the
fuse block and/or terminal block
Terminal connections to the
heating elements
Terminal connections of
contactor operating coil.
Contactor operation is achieved by energizing a 120 volt operating coil located within the contactor in response to a call
for heat from the immersion thermostat. Upon a call for heat, one or more contactors will energize all heating elements
simultaneously. Optionally, time delay sequencers may be used to stage contactor activation thereby reducing the
inrush of current to the water heater.
Standard Controls
4
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