Service Manual

Page 4
GENERAL INFORMATION
General Controls Layout
Pressure
Gage
(optional)
Control Circuit
Transformer
Thermostat
Control
Heating Element
Time Delay
Sequencers
(optional)
Terminal strip
High Limit
(ECO)
Power Circuit
Fuse Blocks
Terminal
Block
Control Circuit
Fuse Block
Contactors
High Limit
Immersion Bulb
Thermostat
Immersion
Bulb
Heating
Element
Alarm
Horn
(optional)
Alarm
Horn Relay
(optional)
Low Water
Level Control
(optional)
Low Pressure
Limit Switch
(optional)
High Pressure
Limit 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
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