LP-551 Rev. 3.9.16
45
Screen
Description
SUPPLY SEN 180
o
F
RETURN SEN 150
o
F
This is the first screen that appears
after pressing
>
, and shows the
actual temperatures measured
by the supply and return sensors.
NOTE: If the boiler is configured to
use a 0 – 10 volt input, the return
sensor is disabled and the second
line of the display will be blank.
Press v once.
NA NA
SUPPLY SEN 122
o
F
The actual temperature measured
by the supply sensor is displayed on
the bottom.
Press v once.
0-10 SIGNL ON
*
Shows if 0-10 volt is enabled.
Press v once.
This screen appears only when the
boiler is set as a Master Boiler.
CAS SET 190
o
F
SYSTEM 112
o
F
This screen displays the cascade set
point (maximum 190
o
F) on the top
line. The system sensor reading is
on the second line. The control will
cascade the boilers up to this set
point depending on demand.
Press v once.
TANK SET 120
o
F
RET / TANK OFF
Displays
the
current
tank
temperature set point on the top line.
The actual temperature measured
by the tank or return sensor (HTP
7250P-325) is displayed on the
bottom line. If a mechanical aquastat
is used in place of the recommended
sensor, the second line will display
‘OFF’ in place of the temperature
if the aquastat measures close to
its set temperature, or ‘ON’ if the
aquastat temperature is too low.
Press v once.
NA 11
o
F
FLUE 95
o
F
The second line displays the current
boiler flue temperature.
Press v once.
FLAME 0.0uA
FAN SPEED 3497 RPM
This screen displays boiler flame
current on the top line. The second
line displays boiler fan speed.
Press v once.
0-10 V 0.0V
*
The top line displays the voltage on
the optional input. This voltage is
only relevant if an external 0-10 volt
signal is being used to control the
boiler.
Press v once.
BUS COMM NO CONN
This display shows the status of
the communication bus between
multiple boilers. If in a single boiler
configuration, the display will
show ‘NO CONN’. In a multiple
boiler configuration, if this is the
Master Boiler and other boilers are
connected to the communication
bus and powered, this screen will
show the address of each boiler
connected to the bus.
Press v once.
POWER ON 0H
CH ON 0H
The top line indicates the amount of
hours the boiler has been powered
over its life. The second line is not
applicable.
Press v once.
VWH ON 0H
GOOD IGNIT 1X
The top line indicates the hours the
burner has been on for hot water
demand over the boiler’s life. The
second line indicates how many
times the burner has successfully
ignited over the boiler’s life.
Press v once.
SYS CH ON 0H
SYS VWH ON 0H
The top line is not applicable. The
second line registers system pump
hours on the cascade master ONLY.
Press
>
once at any status
screen.
TEMPERATURE CONTROL
ANALOG SIG 0.2 V
Displays 0-10V status when 0-10V is
connected.
Table 25 - Boiler Control Status Menu Screens
The next ten screens display the last ten boiler lockout faults.
Press
v
to scroll through the faults from most recent to oldest.
Screen
Description
FAULT HISTORY 1
07/27/2009 Mo 5:19A
This screen displays the most recent
boiler control lockout fault. The
top line will alternate between the
words ‘FAULT HISTORY’ and the
fault code encountered. The bottom
line displays the date and time the
fault occurred.
Press v once.
FAULT HISTORY 2
08/28/2009 Fr 5:19A
This screen displays the second
oldest boiler control lockout fault.
The top line will alternate between
the words ‘FAULT HISTORY’ and
the actual fault encountered. The
bottom line will display the date and
time that the fault occurred.
Press v once.
FAULT HISTORY 3
08/28/2009 Fr 5:19A
This screen displays the third oldest
boiler control lockout fault. The top
line will alternate between the words
‘FAULT HISTORY’ and the actual
fault encountered. The bottom line
will display the date and time that
the fault occurred.
Press v once.
Summary of Contents for EP-220 VWH
Page 33: ...LP 551 Rev 3 9 16 33 Figure 24 Cascade Master and FollowerWiring ...
Page 34: ...LP 551 Rev 3 9 16 34 Figure 25 Internal Connection Diagram ...
Page 57: ...LP 551 Rev 3 9 16 57 Figure 30 Combustion System Replacement Parts 220kBTU Model ...
Page 58: ...LP 551 Rev 3 9 16 58 Figure 31 Combustion System Replacement Parts 299 399kBTU Models ...
Page 59: ...LP 551 Rev 3 9 16 59 Figure 32 Replacement Parts All Models ...