Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 374)

<6. Maintenance>
6-21
IM 11B08A01-01E
EPC Box
EPC for Carrier Gas 1
Outlet
Side
Inlet Side
EPC for Carrier Gas 2
EPC for FID Hydrogen
(or Nitrogen) 1 for combustion
EPC for FID Combustion Air 1
EPC for FID Combustion Air 2
EPC for FID Hydrogen
(or Nitrogen) 2 for combustion
EPC Support
Screw (two)
Figure 6.18
6.2.3 Components for Pressure/Flow Control Section
The instructions for replacing the following parts in the Pressure/Flow Control section are
explained.
(1) Regulator valve for carrier gas
(2) Regulator valve for utility gas
(3) Regulator valve for purge air and solenoid valve air
(4) Vortex tube
(5) Hydrogen Limiting Unit
(1) Regulator for Carrier Gas
This regulator is installed in the isothermal oven and used to control the carrier gas pressure (see
Figure 6.19).
(1) Stop the operation. (See “3.3.4 Stopping operation” for this procedure).
(2) Stop the supply of power.
CAUTION
The isothermal oven is extremely hot after turning off the power immediately. Keep the purging
air supplied for more than an hour after turning off the power. Keep hands away from the oven
components.
(3) Turn off supplies of carrier gas, utility gases (FID hydrogen gas for combustion and FID
combustion air) and samples.
(4) Open the control unit door using a key included in the accessory kit. And remove the cover
by removing the two screws of the pressure/fl ow control section.
2nd Edition : May 11, 2012-00
6