Install Instructions

60
SECTION XII: OPERATING (CONTINUED)
d. If the thermostat is not satised and the
Operating Setpoint (SP) is reached the system
circulator will continue to operate and the burner
will stop. When the boiler water temperature
drops below the setpoint less the differential
setting the burner will restart.
e. After the thermostat is satised the burner and
circulator are stopped.
f. The Warm Start Boiler Control also includes
a low limit control function. When the boiler
water temperature falls below the Low Limit
Setpoint less the Low Limit Differential the
“ZC” terminal and System Circulator outputs
are de-energized and the oil primary is energized
to start the burner. As temperature rises above
the Low Limit Setpoint the burner is stopped,
the “ZC” output is energized and the System
Circulator is enabled to run in response to a call
for heat.
g. On burner start, if the CAD cell does not see
ame within approximately 15 seconds, primary
control will shut down the burner and enter into
a lockout mode. A lockout is reset by pressing
the reset button located on the primary control.
If the ame is lost while the burner is ring, the
primary control shuts down the burner, enters a
60 second recycle delay, and repeats the ignition
sequence. If after three (3) trials for ignition,
ame is not detected, primary control will enter
into restricted mode. Restricted mode is reset by
holding down the reset button for 15 seconds.
3. Using Cold or Warm Start Boiler Control (Boiler
Control) Features
The Boiler Control is located on front of boiler.
The Boiler Control display, along with Up ñ,
Down ò, and “I” keys may be used to view boiler
operating status (Figure 33).
4. Viewing the Operating Mode Options
In operating mode the user may view (but not
change) boiler operating status, settings and
troubleshooting information. To view Boiler
Control display information:
Press and release the
“I” key on the Boiler Control
to change from one parameter to the next. Each
setting will alternately ash between the relevant
display code and its corresponding value.
Operating Mode Options
t
Status Numbers:
 Standby
 Running
 Self Test)
bt
Boiler Temperature
P
Operating Setpoint (Outdoor Reset)
HL
High Limit Setting
HdF
High Limit Differential
LL
Low Limit Setpoint (warm start only)
LdF
Low Limit Differential (warm start only)
hr
Heat Request Status
dh
DHW Request Status
Err
Boiler Error
For example, when the “I” key is pressed on the
Boiler Control until “bt” is displayed, it will then
ash a three digit number (such as “0”) followed
by either “F” (or “C”). This indicates that the
boiler water temperature is 180°F. Other operating
parameters display the information in a similar
fashion.
Please note that in operating mode to hold the
display on the value the user can press and hold
either the Up ñ or Down ò keys and the value
will be continuously shown. This may be helpful in
watching a value “live”.
5. Changing the Adjustable Parameters
To adjust parameters such as the High Limit
Setpoint and High Limit Differential:
a. Using the Boiler Control display, access the
adjustment mode by pressing and holding the Up
ñ, Down ò, and “I” keys simultaneously for
three (3) seconds. This procedure is intended to
discourage unauthorized changes or accidental
changes to limit settings.
b. Press the "I" key to display available Adjustment
Mode options. Select an option.
Figure 33: Boiler Control
Key Function & Orientation