53
GAS-FIRED BOILER Boiler Manual
PART 10. START-UP PROCEDURE (CONTINUED)
rain, etc.) during appliance operation and
service (circulator replacement, condensate
trap, control replacement, etc.)
A. OPERATING INSTRUCTIONS
Remove boiler cover. If you smell gas, STOP.
Follow listed safety instructions. If you do not
smell gas, follow the next steps.
1. Turn on all electric power to appliance.
2. Adjust the temperature setpoint of the Mod
Con Boiler if desired. The factory default
setting is 180°. If changes are necessary
follow “Adjusting The Mod Con Setpoint” in
this section.
3. On the intial start-up of this boiler, you will
note a lock-out code of |F01|. This is a low gas
pressure switch lock-out from the factory-
installed low inlet gas pressure switch
(located on the left for the Mod Con 500 and
on the right for the Mod Con 850). You will
also see a yellow LED illuminated under the
cover of the inlet gas pressure switch. Once
the gas is turned on, reset the gas pressure
switch by FIRMLY pressing on top of the
plastic cover over the red reset button. You
will note that yellow LED has now gone out.
Press and hold the {S4} key on the control
panel for about 4 seconds to begin normal
operation.
4. Set the thermostat to the desired setting.
5. If the appliance fails to start, refer to the
Troubleshooting section in the back of this
manual.
B. ADJUSTING THE SETPOINT
NOTE: Before you can change the temperature
from the factory setting of 180 degrees, you
must make sure none of the thermostats are
calling for heat. The controller will not memo-
rize a program setting while in a heating cycle.
To adjust the temperature to the Mod Con Boiler:
– Press the {S3/Program} Key for 3 seconds
until you see a flashing “C” alternating to
“180” (this number is the factory set point
of 180°)
To change the temperature set point:
– Press the {S1/
-
} to decrease temperature
(Boiler temperature can go as low as 50°)
– Press the {S2/+} to increase temperature
(Boiler temperature can go as high as
200°)
To access additional setting options:
– Press {S3} to scroll through and view the
following settings:
1st time – |C| Boiler Temperature Set Point
2nd time – |Ch| Boiler Differential Set Point
3rd time – |D| Indirect Temperature Set
Point
4th time – |DH| Indirect Differential Set
Point
5th time – |f| Temperature measurement
in Fahrenheit to Celsius
To increase or decrease the values, press the
{S1/
-
} to decrease and {S2/+} to increase.
Changes are directly stored and the display
returns to normal mode after one minute.
C. STATUS MENU
Installers are also able to check the current sta-
tus of the Mod/Con Boiler parameters by press-
ing the {S4/RESET} key for 3 seconds. Once acti-
vated, the display will show |d1| alternating value
of the actual supply temperature. To change to
the next function value, the user can press the
{S1/
-
} (alternating down to previous function
value) or press the {S4/RESET} key (alternating up
to the next function value). Actual values are dis-
played for each function. Listed below are the
values which can be displayed. These values
cannot be changed. To exit menu, simply press
{S3/Program} key to resume normal operation.
Function Value
d1 — Actual Temperature from supply sensor
d2 — Actual Temperature from return sensor
d3 — Indirect Temperature will be displayed if
a Superstor indirect fired water tank and
a 7250P-325 sensor is connected.
If a mechanical control is used, the
display will show a |0| if the control is
open and a |1| if it is closed. If an DHW
tank is not connected the display will
read |0|.
d4 — |320| Not used
d5 — Actual Temperature from the outdoor
sensor if connected |NC|.
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