HTP EP-220 VWH, Installation, Start-Up, Maintenance, Parts, Warranty

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LP-551 Rev. 3.9.16
47
B. Cascade Menu
This menu is accessed by pressing < at the default menu or >
at the status menu.
Screen Description
CASCADE MASTER READY
SYS PUMP OFF
This screen displays when the boiler
is configured as a Cascade Master
and the system is ready to accept
a demand for heat. The second line
indicates the cascade system pump
output status. This screen alternates
with the default screen every 5
seconds or can be accessed by
pressing the
<
key from the default
screen.
CASCADE NO FOLLOWER
SYS PUMP OFF
This screen displays when the boiler
is configured as a Master Boiler and
there are no connected follower
boilers, or the follower boilers are not
powered. The second line indicates
cascade system pump output status.
This screen alternates with the
default screen every 5 seconds or
can be accessed by pressing the
<
key from the default screen.
CASCADE NO SENSOR
SYS PUMP OFF
This screen displays when the boiler
is configured as a Master Boiler and
there is no system temperature
sensor connected or the system
sensor is defective. The cascade
system will still function in this
situation with reduced efficiency.
All boilers will run simultaneously
rather than in a staged fashion.
The second line indicates cascade
system pump output status. This
screen will alternate with the default
screen every 5 seconds or can be
accessed by pressing the
<
key from
the default screen.
Press v once.
BLOCKING HISTORY 10
08/28/2009 Fr 5:19A
This screen displays the tenth oldest
boiler control blocking error. The
top line will alternate between the
words ‘BLOCKING HISTORY’ and
the blocking code encountered.
Table 27 - Boiler Fault Screens
CASCADE VWH 0123 567
SYS PUMP ON 12:47P
This screen displays information
about cascade status. The VWH in
the center of the top line shows that
cascade demand is coming from
the tank sensor or thermostat. You
may also see 0-10 if the demand
is from a 0-10 volt input. The
following numbers show which
boiler addresses are currently
communicating to the master.
If a boiler address is not used or
communicating, the number will
not display. In the example to
the left, boiler address #4 is not
communicating. When a boiler in the
system is firing, its address number
will alternate with a ‘.’ to signify it
is firing. The bottom line shows the
status of the system pump output
contacts.
Press v once.
CASCADE PWR 100%
PRESENT 01234567
This screen displays overall cascade
power output. The range of this
value is the number of boilers
communicating with the Master x
100. For example, if 8 boilers are
connected and firing, the maximum
cascade power is 800%. The second
line shows which boiler addresses
are communicating with the Master.
Press v once.
CASCADE SYST 118
o
F
CASCADE SET 190
o
F
This screen displays current system
temperature sensor reading on the
top line and the cascade system
temperature setting on the bottom.
Press v once.
BOILER 0 100%
BOILER 1 56%
This screen displays the current
cascade power demand output
on a per connected boiler basis
for boilers addressed as 0 and 1.
In the example, boiler 0 is being
commanded to fire at 100% and
boiler 1 at 56%. If this were a 2 boiler
system, the ‘CASCADE PWR’ screen
above would read 156%.
Press v once.
BOILER 2 0%
BOILER 3 0%
This screen displays the current
cascade power demand output on a
per connected boiler basis for boilers
addressed as 2 and 3.
Press v once.
BOILER 4 0%
BOILER 5 0%
This screen displays the current
cascade power demand output on a
per connected boiler basis for boilers
addressed as 4 and 5.
Press v once.
BOILER 6 0%
BOILER 7 0%
This screen displays the current
cascade power demand output on a
per connected boiler basis for boilers
addressed as 6 and 7.