State Water Heaters 301 Series Instruction Manual page 49

Temperatures Menu
Description/Action
• Differential - Adjustable user setting that changes the tank
temperature differential with a range of 2° to 20°F. The factory
setting is 8°F.
• Tank Temperature - Non adjustable. Control system sensed
temperature (averaged from upper & lower temperature probes).
• Tank Probe Offset - adjustable user setting, range -5° to +5°
(factory setting 0°).
Note: These settings should only be used if hot water supply
temperature varies greatly from the Operating Set Point
setting.
• The Tank Probe Offset is used to calibrate control system
temperature sensing. This can improve the precision of
temperature control in the storage tank and at points of use.
This feature can also be used to compensate for building
recirculation loops (hot water returning to the storage tank) that
may cause the heating cycles to terminate prematurely.
• Example: If the current temperature from a temperature probe is
120°F (49°C) and the Offset setting is adjusted to a value other
than 0°, the control system would calibrate or "offset" the sensed
temperature from the probe and the averaged tank temperature.
Heating cycles would be activated and deactivated based on
the calibrated (offset) temperature. A -5° setting results in +5°
hotter water.
• These settings are adjusted as described in
and Differential Adjustment
HEATER STATUS MENU
Description/Action
Press Heater Status from the Main Menu to enter this menu. This menu
contains non adjustable operational information. Use the slidebar to navigate
the menu.
Status - displays the current Operating State, see
•
47).
ECO Contact, Low Gas PS, Blocked Inlet PS, Blocked Outlet
•
PS, Blower Prover PS - displays the current state of the switch
contacts; open or closed.
• Igniter On, Gas Valve On - displays whether or not the control
system is currently energizing these water heater components; yes
= energized, no = de-energized.
• Flame Detected - displays whether or not the control system has
detected Main Burner flame during ignition from the flame sensor.
• Blower RPM CMD – displays the controls commanded blower
rpms.
• Blower RPM – displays the actual blower rpms.
• Anode Current, Anode Tank Voltage, Anode Drive Voltage –
displays the powered anodes current and voltage levels.
Note: Menu displays shown are for informational purposes only. The
actual heater display will vary dependent upon the operational
state of the water heater.
Operating Set Point
(page 48).
Table 19
Operating Setpoint
Differential
Tank Temperature
Tank Probe Offset
Status:
ECO Contact
(page
Low Gas PS
Blocked Inlet PS
Blocked Outlet PS
Igniter On
Gas Valve On
Flame Detected
Blower RPM CMD
Blower RPM
Anode Current
Anode Tank Voltage
Flame Detected
Blower RPM CMD
Blower RPM
Anode Current
Anode Tank Voltage
Anode Drive Voltage
49
Display
Temperatures
120°F >
8°F >
120°F
0°F >
BACK HELP
Display
Top of Menu
Heater Status
Standby
Closed
Closed
Closed
Closed
No
BACK HELP
Middle of Menu
Heater Status
No
No
51.500mA
2.641V
BACK HELP
Bottom of Menu
Heater Status
No
0
0
51.500mA
2.641V
3.539V
BACK HELP
0
0