IBC VFC 15-150 Manual

2-1
BOILER SYSTEMS AND OPERATION
VFC 15-150 - VFC 45-225 MODULATING GAS BOILERS
BOILER SYSTEMS AND OPERATION 2.0
2.1 GENERAL
VFC modulating series boilers are designed to service three separate, directly
piped heating loads using different pre-selected water temperatures and heat
regulation routines. External controls can extend applications.
Thecontrolisoutttedtoprovideforoutdoorreset,setpointregulationandDHW.
ThedesignobjectiveisDHWplusradiantoorandbaseboardspaceheating,
each operable at a unique temperature.
While the three load “channels” are shipped pre-programmed with default values,
they can each be programmed with DHW, set-point control or outdoor reset
parameters (see Section 2.7 Set Up and Load Denition). The strategy is to
deliver high temperature water, as required by most indirect DHW tanks on the
market,andbynnedtubebaseboards,butdefaulttothelowestpossibleboiler
supplytemperaturetomaximizeefciency.TheVFCmodulatingseriesboilers
can handle supply temperatures within the range 34°F to 185°F.
CONTROL
The control unit provides overall management of boiler operations, including:
1. Power-up / set-up / boiler state machine (standby / heat call management
etc).
2. Burner, pumps (primary + external) and/or zone valve management.
3. Temperature and throttle operation.
4. Maintenance of a service log with diagnostics.
5. 2 way communications.
Operating and historical data may be accessed at any time, using the Log and
AdvancedSettingselds,availableusingthepermanentlylitLCDscreen.See
below. Data includes the following:
• Ignition counter
• Time records, including burn time by load and the throttle duty cycle
• Error log
USER INTERFACE
2.3.1 Keypad Functions
Avebuttonkeypadisprovidedforintuitivenavigationaroundthescreen.The
four outer keys are used to move the cursor up or down, and side to side. The
centrebuttonisusedtomakeselectionsandconrminputs.Thelefthandkey
is also used to back-step to the previous screen; multiple key stokes are used to
withdraw back to the operating status screen.
2.2
WARNING
If the boiler can become
exposed to uid temperatures
below 34°F (1°C), a method of
protection to prevent freezing
of condensate should be
employed. Contact the factory
for further information.
2.3

IBC VFC 15-150 Specifications

General

Brand	IBC
Model	VFC 15-150
Category	Boiler
Language	English