IBC Technologies Inc.
34
VFC 15-150 and VFC 45-225
require amendment at most
installation sites. The mapping
feature allows reassignment of the
sensor contacts to support non-
standard functions. For example, re-
allocation of the Water Temp. signal
from “(boiler)
Outlet
” to “
Secondary
Loop
” will allow the throttle
management routine to manage a
secondary loop temperature rather
than the boiler’s own direct supply
temperature. Use this when injecting
into a commercial heating: cooling
loop. Another possibility: two
separate reset channels – each with
its own indoor trim. Sensor ports
open for such re-assignment are
DHW, Indoor, Outdoor and
Secondary Loop.
14.
The final 3 lines are for the
motorized mixing valve option. See
separate documentation for this.
15.
To compensate for altitude at the
installation site, use the
Altitude
adjustment feature, found in the
front
Installer Setup
menu (several
lines below “
Heat Load
Configuration”
. Key in the altitude
– in hundreds of feet above sea
level. For example, an installation at
2,860 feet should be entered as “29”
(as rounded to the nearest hundred).
16.
Two lines below
Altitude
adjustment
is the field for amendment of the
primary pump heat purge time. To
shorten the 5 minute post-firing
period, reduce the 300 second
interval to as low as 60 sec. Similar
adjustment of secondary pump run
time can be made in the
Heat Load
Configuration / Configure Load
1,2,3
fields (down to zero sec.= off).
17.
Upon completion of the input of
load parameters, use the left button
to step back through the menu
system to return to the Operating
Status screen.
18.
To enact the control arrangements as
input, it is necessary that the piping
structure and system wiring are
configured appropriately. Refer to
Section 1.5.2. -
Installation Rules
for piping layouts and the Wiring
Schematic (Page 16). Ensure that
DHW aquastat or thermistor probe
leads, thermostat and pump (or zone
valve) leads are connected at their
respective contact points on the
terminal block.
19.
Forced shutdown: – use the
Heat
Load Configuration
screen to switch
off load(s) to remove a call for heat,
if no other means are readily
available.
Simple removal of
power to boiler is to be avoided –
this interrupts the moisture
management routine.
Treat the unit
as you would treat a computer,
allowing an orderly shutdown.
