28
Press and release the
“
I
”
key on the Boiler Control
to change from one parameter to the next. Each
setting will alternately flash 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
flash 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”.
4.
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.
VII: OPERATING (continued)
Warm Start Boiler Control
Adjustment Mode Options
HL_
140-240°F
Adjust High Limit Setting
LL_
110-220°F
Adjust Low Limit Setting
Ldf
10-25°F
Adjust Low Limit Differential
Setting
ZC_
ZR
or
dh
ZC and ZR Terminal Function
Or_
0-10 minutes
Pump Overrun Time
PP_
0-20 minutes
Pump Pre-purge Time
t_
140 - 180°F
Start Temperature
Pt_
On
or
Off
Priority Time
f-C
F
or
C
Select degrees F or C Mode
bac
Back to Operating Mode
c. Press the Up
ñ
and Down
ò
keys to adjust the
displayed setpoint to the desired value.
d. To return to the normal operating mode from
the Adjustment Mode, when the “
bc
” option is
displayed, press either the Up
ñ
or Down
ò
key.
If no keys are pressed, after five (5) minutes the
Boiler Control will automatically return to the
Operating Mode.
5.
More Information about Adjustable Parameters
a. High Limit (
HL_
)
The Boiler Control is factory programmed with
a High Limit Setpoint of 180
°
F. The boiler turns
“off” when the boiler water temperature (
bt
)
is above this value. The High Limit setpoint
is adjustable between 140
°
and 240
°
F. The
Operating Setpoint (
P
) will equal the High
Limit Setpoint.
b. High Limit Differential (
HdF
)
On Warm Start Boiler Control the High Limit
Differential is not adjustable and is fixed at 10°F.
c. Low Limit (LL_)
The Warm Start Boiler Control is factory
programmed with a Low Limit Setpoint of
110°F. On falling temperature the boiler
turns “on” and the “ZC” terminal and System
Circulator outputs are de-energized when the
boiler temperature is less than the Low Limit
Setpoint less the differential. On a rising
temperature when the boiler temperature is above
the Low Limit Setpoint the boiler turns “off”,
the “ZC” terminal output is energized and the
System circulator is enabled to respond to a call
for heat. The Low Limit Setpoint is adjustable
between 110°F and 220°F.
d. Low Limit Differential (
Ldf
)
The Warm Start Boiler Control is factory
programmed with a Low Limit Differential
