Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 373)

<6. Maintenance>
6-20
IM 11B08A01-01E
Pressure Switch for Carrier Gas 2
Pressure Switch for Carrier Gas 1
Figure 6.17
(6) EPC
(1) Stop the operation. (See “3.3.4 Stopping operation” for this procedure).
(2) Stop the supply of power.
(3) Turn off the supplies of the carrier gas, utility gases (FID hydrogen gas (or nitrogen) for
combustion, FID combustion air) and supply of samples.
(4) Open the door for the isothermal oven of the oven unit.
(5) Loosen the four screws on the EPC container cover (front right side of the isothermal oven)
using a hexagon wrench and remove the cover.
(6) Remove the couplings to the inlet (IN) and outlet (OUT) of the EPC (see Figure 6.18).
Label the couplings for ease of identifi cation later.
(7) Disconnect the connector of the cable for EPC from the EPC card.
(8) Remove the two screws which fi x the EPC.
(9) Install a new EPC in the reverse order of steps (6) to (8).
(10) Reinstall the EPC box cover. Firmly tighten all of the four screws on the EPC box cover to
maintain the explosionproof condition.
(11) Close the door to the isothermal oven.
(12) Turn on the power.
(13) Start supplying FID hydrogen (or nitrogen) for combustion, FID combustion air, and carrier
gas. Perform a leak test around the couplings.
K9630KS
2nd Edition : May 11, 2012-00