Reznor YDSA Unit Installation Manual User Manual
Page 45
Form I-Y, P/N 273646R6, Page 45
Step 4 Modulating Valve Adjustment Instructions (See FIGURE 24B, page 43) - HIGH FIRE SETTING (BUTTON
#1)
1. To enter the high fire setting mode, press and hold button #1 until the LED lights solid red. Release. The valve is
now in the high fire setting mode. Buttons #1 and #2 are used to set desired high fire setting.
2. Press or hold Button #1 to increase gas flow. Each button press equates to the minimum available step size and
will increase flow slowly. Holding the button down auto steps and eliminates the need to repeatedly press the
button. Use the feature to rapidly increase the flow.
Press or hold Button #2 to decrease gas flow. Each button press equates to the minimum available step size and
will decrease flow slowly. Holding the button down auto steps and eliminates the need to repeatedly press the
button. Use this feature to rapidly decrease the flow.
3. To save the high fire setting, simultaneously hold Buttons #1 and #2 until the LED turns off.
NOTE: Controls left
in any setting mode will default to the current settings and return to normal operating mode after 5 minutes of
inactivity.
4. When the high-fire pressure measurement is correct, proceed to Step 5 to check low fire pressure. If high fire
cannot be accomplished, consult the factory service department.
Step 5 Modulating Valve Adjustment Instructions (See FIGURE 24B, page 43.) - LOW FIRE SETTING (BUTTON
#2)
1. To enter the low fire setting mode, press and hold button #2 until the LED light blinks red. Release. The valve is
now in the low fire setting mode. Buttons #1 and #2 are used to set desired low fire setting.
2. Press or hold Button #2 to decrease gas flow. Each button press equates to the minimum available step size and
will decrease flow slowly. Holding the button down auto steps and eliminates the need to repeatedly press the
button. Use this feature to rapidly decrease the flow.
Press or hold Button #1 to increase gas flow. Each button press equates to the minimum available step size and
will increase flow slowly. Holding the button down auto steps and eliminates the need to repeatedly press the
button. Use the feature to rapidly increase the flow.
3. To save the low fire setting, simultaneously hold Buttons #1 and #2 until the LED turns off.
NOTE: Controls left
in any setting mode will default to the current settings and return to normal operating mode after 5 minutes of
inactivity.
4. When the low-fire pressure measurement is correct, proceed to Step 6. If low fire setting cannot be
accomplished, consult the factory service department.
Step 5 - Low-Fire Manifold Pressure Reading
From the Test Mode
Screen E.a.5:
•
Press the enter key until the cursor is flashing on the
Heat Capacity: field.
Adjust the Heat Capacity value to 0% which will result in a signal of 2vdc to the
modulating gas valve.
Using the manometer, measure the manifold pressure on low fire.
Check the pressure
with the chart on page 49. Normally adjustments to the factory settings should
not be necessary.
Follow the procedure in Step 5 to adjust the low fire output pressure of the modulating
valve.
Step 6 - Close the manual valve. Remove the manometer. Check for a leak at the
pressure taps using a leak-detecting solution.
If further unit component testing is required proceed with the instructions in paragraph
10.3 for the remaining test mode menu screens. If further unit testing is not required,
press the enter key in succession until the cursor is flashing in the uppermost left hand
corner of screen E.a.5 and use the up arrow key to navigate to Test Mode
Screen
E.a.1. Press the enter key to select the Enable: field. Press the down arrow key to set
the value to OFF.
Instructions for Measuring Manifold Pressure - Option AG73
(modulation with one heat sections) (cont’d)