UTICA BOILERS UB125, Инструкция по установке, эксплуатации и обслуживанию

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Xiii. cHecKoUt ProceDUre & aDjUstMeNts
sEt tHERMostat to dEsIREd tEMpERatuRE
Set thermostat to desired room temperature and observe
several complete cycles to verify proper operation.
FInal REVIEW and sIgn-oFF
Review all instructions shipped with this boiler with
owner or maintenance person. Instructions must be
affixed on or adjacent to the boiler. Then complete
and sign the “Installation and Checkout Certificate” at
the end of this manual.
aDjUstMeNts aND cHecKoUt
It is important that this appliance operate between 8.5 and 10% CO
2
. To verify that the
appliance is operating in this range, follow the steps below.
Important: Under all conditions CO levels should not exceed 100ppm.
1. Check incoming gas pressure to the appliance using a pressure gauge with a resolu-
tion of 0.1” w.c. or better and a range from 0” to at least 14” w.c. Close the gas shut-off
inside the boiler jacket. Locate the inlet pressure tap on the gas valve (see Figure #15
in Section XI). Open the inlet pressure tap screw ½ turn and connect the positive side of
the pressure gauge to the inlet pressure tap. Open the gas shut-off. The gas pressure
should read between 4” and 10” w.c. for natural gas and between 10” and 14” w.c. for
propane gas.
2. Drill a hole in the plastic CPVC vent pipe or exhaust tee, just large enough to allow
access for the sample probe of your combustion analyzer.
3. Turn the thermostat to the closed position so the appliance is activated.
4. Allow the appliance to run for approximately 5 minutes.
5. Insert the sample probe of your combustion analyzer into the hole you drilled in step 2
above, about halfway into the exhaust gas stream. Take a flue gas reading and observe
the CO
2
value. Adjust the throttle screw until the CO
2
value is between 8.5 and 10%.
(O
2
between 5.5% and 2%) Turning the throttle screw counterclockwise increases the
rate and the CO
2
value. Turning the throttle screw clockwise decreases the rate and
the CO
2
value. Allow the appliance to stabilize for approximately 1 minute after adjust-
ing the throttle screw before you take a reading with your combustion analyzer.
6. After adjustments are made stop the appliance, disconnect the pressure gauge, tight-
en the inlet pressure tap on the gas valve, remove the CO
2
meter from the CPVC pipe,
and seal the hole with an appropriate material.
7. Return the thermostat switch to its original position.
FiNal cHecKoUt oF tHe iNstallatioN
After any adjustment to the appliance, observe several complete cycles to ensure that all
components function correctly.