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A.O. Smith 100 Power Vent DV Series 120 Benutzerhandbuch

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teMperatures (cont)
descrIptIon/actIon
dIsplaY
tank temperature
• 
 - non adjustable - control system sensed 
temperature from the Temperature Probe.
tank probe offset
• 
 - adjustable user setting, range -5° to +5° 
(factory setting 0°). 
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 the temperature 
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.
Operating Set Point  
140°F
Differential  
8°F
Tank Temperature  
120°F
Tank Probe Offset
 
                               0°F
  CHANGE 
BACK 
HELP
Temperatures
heater status
descrIptIon/actIon
dIsplaY
Select Heater Status from the Main Menu and press the Operational 
Button under "SELECT" to enter this menu. This menu contains non 
adjustable operational information. Use the Up & Down Buttons to 
navigate the menu.
status
• 
 - displays the current Operating State, see Table 4 for a 
description of the various operational states.
eco contact
• 
, 
blocked Inlet ps, blocked outlet ps, blower 
prover ps - displays the current state of the switch contacts; 
open or closed.
blower low on
• 
, 
blower high on - displays whether the 
blower is running at high speed during Pre/Post purge and 
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 
running at the designated speed.
Igniter on
• 
, 
Gas valve on - displays whether or not the control 
system is currently energizing these water heater components; 
yes = energized, no = de-energized.
Igniter current
• 
 - displays whether or not the control system 
has detected the required minimum current.
flame detected
• 
 - displays whether or not the control system 
has detected Main Burner flame during ignition from the Flame 
Sensor.
E
• 
xternal Input enable - displays whether or not the S1 
dipswitches have been configured to activate the Enable/
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.
Top of Menu
Status  
Standby
ECO Contact  
Closed
Blocked Inlet PS  
Closed
Blocked Outlet PS  
Closed
Blower Prover PS  
Open
Blower Low On  
No
Blower High On  
No
 
 
BACK 
HELP
Heater Status
Bottom of Menu
Blower High On  
No
Igniter On  
No
Igniter Current  
No
Gas Valve On  
No
Flame Detected  
No
External Input Enable  
No
Ignition Trials  
3
 
 
BACK 
HELP
Heater Status