A.O. Smith 100 Power Vent DV Series 120, 317443-000 instruction manual Temperatures, Heater Status

Temperatures (cont)
Description/Action		Display
• Tank Temperature - non adjustable - control system sensed
temperature from the Temperature Probe.	Temperatures
• Tank Probe Offset - adjustable user setting, range -5° to +5°	Operating Set Point		140°F
(factory setting 0°).
The Tank Probe Offset is used to calibrate control system	Differential		8°F
temperature sensing. This can improve the precision of	Tank Temperature		120°F
temperature control in the storage tank and at points of use.	Tank Probe Offset		0°F
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 the temperature	CHANGE	BACK	HELP
probe is 120°F (49°C) and the Offset setting for the probe is
adjusted to a value other than 0°, the control system would
calibrate or “offset” the sensed temperature from the probe.
Heating cycles would be activated and deactivated based on
the calibrated (offset) temperature.

Note: The Tank Probe Offset should only be used if the hot water supply temperature varies greatly from the Operating Set Point setting. These settings are adjusted in the same way described for the Operating Set Point and Differential Adjustment.

Heater Status

Description/Action	Display
Select Heater Status from the Main Menu and press the Operational	Top of Menu
Button under "SELECT" to enter this menu. This menu contains non	Heater Status
adjustable operational information. Use the Up & Down Buttons to	Status	Standby
navigate the menu.
• Status - displays the current Operating State, see Table 4 for a	ECO Contact	Closed
description of the various operational states.	Blocked Inlet PS	Closed
• ECO Contact, Blocked Inlet PS, Blocked Outlet PS, Blower	Blocked Outlet PS	Closed
Prover PS - displays the current state of the switch contacts;	Blower Prover PS	Open
open or closed.	Blower Low On	No
• Blower Low On, Blower High On - displays whether the	Blower High On	No
blower is running at high speed during Pre/Post purge and	BACK	HELP
the Heating operational states or the blower is running at low
speed during the Igniter Warm Up operational state; yes =
blower is running at the designated speed, no = blower is not	Bottom of Menu
running at the designated speed.
• Igniter On, Gas Valve On - displays whether or not the control	Heater Status
system is currently energizing these water heater components;	Blower High On	No
yes = energized, no = de-energized.
• Igniter Current - displays whether or not the control system	Igniter On	No
has detected the required minimum current.	Igniter Current	No
• Flame Detected - displays whether or not the control system	Gas Valve On	No
has detected Main Burner flame during ignition from the Flame	Flame Detected	No
Sensor.	External Input Enable	No
• External Input Enable - displays whether or not the S1	Ignition Trials	3
dipswitches have been configured to activate the Enable/	BACK	HELP
Disable circuit; yes = the Enable/Disable circuit has been
activated, no = the Enable/Disable circuit has not been
activated. The factory setting is "no" or deactivated.

•Ignition Trials - displays whether or not the S1 dipswitches have been configured to allow 1 or 3 trials for ignition before declaring an "Ignition Failure" Fault condition. The factory setting is for 3 trials.

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