Polaris PGC Instruction Manual page 40

TEMPERATURES (CONT)
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 and lower temperature probes).
• Tank Probe Offset - adjustable user setting, range -5° to +5°F
(factory setting 0°F).
NOTE: These settings should only be used if the 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 sensed temperature from a
temperature probe is 120°F (49°C) and the Offset setting is
adjusted to a value other than 0°F, 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°F setting results in +5°F hotter water.
These settings are adjusted in the same way described for
Operating Set Point And Differential Adjustment on page 39
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 Table 13
on page 38.
• ECO Contact, Blocked Inlet PS, Blocked Outlet 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 RPM.
• Blower RPM - displays the actual blower RPM.
NOTE: The menu display is shown with the Enable/Disable
switch in Enabled position and the water heater is in Standby
mode. When the Enable/Disable switch is in the Disabled
position, the water heater will be in "Water Heating Disabled"
mode.
The menu displays shown are for informational
NOTE:
purposes only. The actual heater display will vary dependent
upon the operational state of the water heater.
Temperatures
Operating Setpoint
Differential
Tank Temperature
Tank Probe Offset
Heater Status
Status:
ECO Contact
Blocked Inlet PS
Blocked Outlet PS
Igniter On
Bottom of Menu
Heater Status
Gas Valve On
Flame Detected
Blower RPM CMD
Blower RPM
40
DISPLAY
120°F >
8°F >
120°F
0°F >
BACK HELP
DISPLAY
Top of Menu
Standby
Closed
Closed
Closed
No
BACK HELP
No
No
0
0
BACK HELP