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9
Start-up
Check flame and combustion
4. Navigate to the Service Screen from the Home Screen by
pressing the MAIN MENU button and then the SERVICE
button.
5. On the Service Screen place heater into Service Mode by
selecting the START button, then selecting Set Gas Valve
1 - High.
6. Insert the probe from a combustion analyzer into the hole
left by the removal of the fitting.
7. Once the boiler has modulated up to rate, measure the
combustion. The values should be in the range listed in
Table 9A below. CO levels should be less than 200 ppm
for a properly installed unit. If the combustion is not
within range reference the Troubleshooting Section in the
Crest Service Manual for possible causes and corrective
actions.
Table 9A Flue Products Chart
Natural Gas
Flue Products
Gas Valve
CO 2 (%)
Valve 1 High
9.2
Valve 1 Low
9.0
Valve 2 High
9.3
Valve 2 Low
8.7
Propane
Valve 1 High
11.0
Valve 1 Low
10.0
Valve 2 High
11.1
Valve 2 Low
10.7
**All set points should be within +/- 0.2%**
8.
Once the heater analysis is complete, test the safety
shutoff device by turning the manual shutoff valve to the
OFF position and ensuring that the heater shuts down
and registers an alarm. Open the manual shutoff valve
and reset the control.
9. Turn the main power off to the boiler and replace the
fitting into the flue pipe connection.
10. Place the boiler back into normal operation.
You must replace the fitting to prevent
WARNING
flue gas spillage into the room. Failure
to comply could result in severe personal
injury, death, or substantial property
damage.
(continued)
(continued)
O 2 (%)
4.6
4.9
4.4
5.5
4.1
5.6
4.0
4.6
Installation & Operation Manual
Set space heating operation
Verify space heat circulator mode
The system pump output can be programmed to never
run (OFF), run only when a space heating demand is
present (ON), or run continuously except during warm
weather shutdown (WWSD). If the boiler is not heating
an indirect HWG (Hot Water Generator) tank, it also
turns on the boiler pump. After the space heating call
for heat ends, and the system pump is programmed
as ON, the system pump continues to run for a short
period of time. If the boiler pump was running, it
continues to run for a short period of time as well.
These pump delays are factory set to 30 seconds. If
different delays are desired, the appropriate parameters
in the control must be changed. See the Crest Service
Manual for a detailed explanation of this procedure.
Set space heating set point temperature
During normal operation, space heating set point
temperatures can be adjusted from the Set Points Menu.
Press the following buttons to navigate to the Set Points
Menu from the Home Screen:
>>
After pressing SETUP, the Password Screen will appear.
Entering the correct password will allow access to all
Installer Level adjustable parameters.
without a password to access the User Level parameters.
1.
To change a set point, use the arrows to highlight a
user set point parameter and press the SELECT
button.
2.
The description of the selected parameter and its
current setting will appear at the bottom of the
screen.
3.
To adjust the set point, press the following
buttons to change the value being displayed:
or
4.
Once the set point has been adjusted to the desired
setting press the SAVE button to change the set
point.
5.
Once all the necessary adjustments have been made,
press the HOME button to return to the Home
Screen.
Note: The SAVE button must be pressed to ensure proper
programming of the controls. Failure to press the SAVE
button will require all changes to be reprogrammed.
>>
Press ENTER
47
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