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GAS-FIRED BOILER Boiler Manual
PART 11: START-UP PROCEDURES FOR THE INSTALLER
A. PROGRAMMING FOR THE INSTALLER
This section allows the installer to set system
limits and the heat curve for the Mod Con Boiler.
These system limits should not be changed by
the user. It is important to document your set-
tings within this manual after you program the
sytem parameters so this will be recorded for
future reference. Record settings in Fig. 11-3.
B. PROGRAM ACCESS
To start, press down and hold the {S/3} and {S/4}
simultaneously for three seconds. You will notice
that the display will change to |000|. Then, with
your {S1/–} key on the display press down until
you see |925|. This is the pass code. To confirm
that the pass code is correct, you will need to
press and hold the {S3/Program} for 1 second to
confirm. If the pass code is entered incorrectly,
the controller program function will be cancelled
and the control returns to normal operation. If the
code is entered correctly, the control will switch
off the gas valve and purge fan while showing a
solid |
---
| in the display. The display will than
show a |1| alternating to |de|. This first function ver-
ifies that the control will address the require-
ments of the Superstor Indirect Fired Water
Heater.
C. PROGRAM NAVIGATION
Next you will have to press the {S/3} key to move
through each function. To increase or decrease
a value, you will need to press either the {S/1
-
}
key or {S/2+} key to change the default values. If
there is no key action for 1 minute, the display
returns to normal operation. Changes are effec-
tive immediately but not directly stored until the
{S/4} key is pressed down for 3 seconds then the
new values are stored. Listed below are the vari-
ety of functions the installer can program into
the 926 Control.
NOTE: See Chart 11-1 in Part 11 to set outdoor
reset curve.
Function Default Function
Number Value Description
1 de Not Applicable
2 149ºF Not Applicable
3 180˚ Maximum Domestic water heater
delivery temperature allowed in
user menu. Installer can set the
maximum temperature that
4 36ºF Not Applicable
5 7ºF Allows the installer to change the
differential in the Indirect Fired
Water Heater (Does not apply if
used with a Mechanical Control)
Range: 1ºF to 18ºF
6 0 Min. Allows the installer to change
the Indirect Circulator Post Purge
Time once the sensor is satisfied
(Note: it is recommend that
Circulator Post Purge Time be
set no greater than 5 minutes).
Range: 0 to 10 minutes
7 68ºF Outdoor temperature that you
wish the central heating should be
disabled—(warm weather shut-
off) Range: 41ºF to 122ºF
*8 5ºF Allows the installer to change the
Minimum Outside Design
Temperature. Range: –49ºF to
32ºF (See Chart 11-1 to set out-
door reset curve)
*9 180ºF Allows the installer to change the
Design Supply Water Temperature
from the Mod Con based on the
Minimum Outside Design
Temperature Range: 77ºF to 200ºF
*10 68ºF Allows the installer to change the
Maximum Outside Design
Temperature for Central Heating.
Range: 95ºF to 32ºF
*11 95ºF Allows the installer to change the
Design Supply Water
Temperature from the Mod Con
based on the Maximum Outside
Design Temperature. Range: 32ºF
to 200ºF
CAUTION
The Boiler cannot be programmed while
there is a call for heat.
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