64
B. PROGRAM ACCESS
To start, press and hold
{S3}
and
{S4}
simultaneously for three seconds. You will notice the display
change to
|000|
. Then, press and hold
{S1}
until you see
|925|
. (If you go past
|925|
, you can use
{S2}
to
decrease the number.) This is the pass code. To confirm that the pass code is correct, press and hold the
{S3}
key for 1 second. If the pass code is entered incorrectly, the controller program function will cancel
and return 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 then show a
|1|
alternating to
|de|
.
This first function verifies that the control is configured as a boiler.
C. PROGRAM NAVIGATION
Next you will have to press the
{S3}
key to move through each function. To increase or decrease a value,
you will need to press either
{S1}
or
{S2}
to change the default values. If there is no key action for 1
minute, the display returns to normal operation. Changes are effective immediately but not directly stored
until the
{S4}
key is pressed down for 3 seconds then the new values are stored. Listed below are the
varieties of functions the installer can program.
The boiler cannot be programmed while there is a call for heat.
NOTE:
See Figure 29 to set outdoor reset curve.
DEFAULT
FUNCTION VALUE
DESCRIPTION
1
|de|
N/A (no change allowed)
2
149
o
F
N/A (no change allowed)
3
180
o
F
Allows the installer to set the maximum domestic water heater delivery temperature.
Range: 95
o
F
to 185
o
F
4
36
o
F
N/A (no change allowed)
5
7
o
F
Allows the installer to change the differential temperature (dh) in the indirect fired water heater
(does not apply if used with mechanical control)
Range: 1
o
F to 18
o
F
6
0 min.
Changes the indirect circulator post purge time once the sensor is satisfied.
(
NOTE:
Post purge time should be set no greater than 5 minutes.)
Range: 0 to 10 minutes
7
68
o
F
Outdoor temperature that will disable central heating (warm weather shutdown)
Range: 41
o
F to 122
o
F
*8
5
o
F
Changes the minimum outside design temperature
Range: -49
o
F to 32
o
F
*9
180
o
F
Changes the design supply water temperature based on the minimum outside design temperature
range
Range: 77
o
F to 200
o
F
*10
68
o
F
Allows the installer to change the maximum outside design temperature for central heating.
Range: 95
o
F to 32
o
F
*11
95
o
F
Changes the design supply water temperature from the boiler based on the maximum outside design
temperature
Range: 32
o
F to 200
o
F
12
68
o
F
Sets the lowest temperature for central heating.
Range: 32
o
F to 200
o
F
13
0 min.
Changes the central heating circulator post purge time once the thermostat is satisfied.
Range: 0 to 10 minutes
14
30 min.
Sets the maximum run time for the indirect fired water heater and the minimum run time for central
heating.
Range: 0 to 60 minutes
Summary of Contents for Mod Con 300 HL
Page 13: ...13 Figure 2 ...
Page 31: ...31 Figure 13 ...
Page 37: ...37 J SIDEWALL VENTING DIAGRAMS Figure 16 Sidewall Venting with Tee and Coupling ...
Page 38: ...38 Figure 17 Sidewall Venting Diagrams ...
Page 39: ...39 K VERTICAL VENTING DIAGRAMS Figure 18 Two Pipe Roof Venting with Tee and Coupling ...
Page 40: ...40 Figure 19 Roof and Sidewall Venting with Stainless Steel ...
Page 44: ...44 E GAS VALVE Figure 21 ...
Page 45: ...45 Figure 22 ...
Page 55: ...55 Figure 28 Mod Con Internal Connection Diagram ...
Page 73: ...73 Figure 32 ...
Page 74: ...74 Figure 33 ...
Page 75: ...75 Figure 34 ...
Page 76: ...76 Figure 35 ...
Page 77: ...77 Figure 36 ...
Page 80: ...80 ...
Page 81: ...81 ...
Page 82: ...82 MAINTENANCE NOTES ...
