Check List After Start-Up - Johnson Controls YORK D4IC-360 Instructions D'installation

2. Make sure both the combustion air intake
and the gas discharge have no obstruc-
tions.
3. Make sure the gas supply line is in
compliance with safety regulations and
is prepared to supply adequate gas flow
and pressure.
Gas supply pipes to the unit must be
air-purged.
Start-up
This burner is equipped with automatic igni-
tion systems.
Do not attempt to ignite it manually.
Start-up, without the YKTOOL
portable test tool (accessory)
. Disconnect power supply to the unit.
2. Set the ambient thermostat to its lowest
temperature in heat.
3. Connect power supply to the unit.
4. Open the gas supply valve to the unit.
5. Set the ambient thermostat to its maxi-
mum temperature in heat.
6. The burner assembly will ignite. (It could
take a few minutes, depending upon the
mode established on the thermostat.)

Check list after start-up

After having activated the entire control
circuit and the gas heating is in operation,
check the following:
. Make sure there are no gas leaks in the
unit and supply pipes.
2. Check gas supply pressure with all gas
units in the building operating at full ca-
pacity.
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Fig.12
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In no case should the pressure in the
gas auxiliary line above 25 mbar, nor
the incoming pressure in the burner as-
sembly below 2.5 mbar.
3. Make sure the gas pressures in the
manifold are correct. (See "Gas valve
adjustment" and Fig. 2.)
4. Visually check the flame at the burners
(Fig. 3).
5. Using a combustion gas analyzer, check
the CO and CO2 content at both smoke
discharges.
With the 4 heat stages in operation, the
carbon monoxide (CO) content should
be below 0.% (000 ppm), and the
CO/CO2 ratio should be below 0.02.
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