System Start-Up Procedure - Michell Instruments Condumax II Installation Operation & Maintenance

OPERATION
3.1

System Start-Up Procedure

Proceed as follows:
1. Unscrew and remove the Condumax II flameproof enclosure cover after
first loosening the hex grub screw.
2. The user interface/display assembly uses two ¼-turn bayonet style fasteners
to secure it and are finger operated - clockwise to lock, counter-clockwise
to release. Temporarily, the user interface/display once disconnected from
the two ¼-turn fasteners, can be re-positioned on the instrument by
securing the right-hand fastener in the left-hand fastener position. This
will situate the user interface/display assembly in an overhanging position
outside of the enclosure, allowing greater access. If there is insufficient
space to accommodate the overhanging user interface/display assembly
on the left-hand side then it can be fully disconnected from the instrument
by disconnecting the ribbon cable connection to the main processor PCB.
3. Locate the solenoid valve and the manual override operating adjuster
(brass screw handle) mounted on the base of the solenoid valve body.
4. Adjust the solenoid valve to the
clockwise) as shown on the label attached to the solenoid valve.
5. Ensure the Letdown Gas Vent Isolation Valve (BV3) is
6. OPEN the Gas Outlet Isolation Valve (BV2).
OPEN
7. Slowly
enter the Sampling System.
8. Fully OPEN
9. Adjust the Bypass Flow Flowmeter/Metering Valve (FM2) to indicate a gas
flow rate of approximately 0.4m³/hour (6.7 Nl/min) (full-scale).
OPEN
10. Slowly
through the Condumax II (2 full turns).
11. Adjust the HCdp Flow Metering Valve (FV1) to indicate a sample gas flow
rate of approximately 0.12m³/hour (2 Nl/min) (full-scale) on the HCdp
Flowmeter (FM1).
12. Fully OPEN
13. Adjust the H
sample gas flowrate of approximately 0.2 to 0.3m
mid to three-quarters full scale).
14. Allow the sample gas to purge the system for a minimum period of 3
minutes.
15. Re-adjust the solenoid valve to the
unscrewed counter-clockwise) as shown on the label attached to the
solenoid valve.
16. Re-fit the Condumax II user interface/display assembly and flameproof
enclosure cover.
10
the Gas Inlet Isolation Valve (BV1) to allow sample gas to
the Bypass Flow Letdown Pressure Regulator (PR2).
the HCdp Pressure Regulator (PR1) to provide a purge flow
the H Odp Letdown Pressure Regulator (PR3) {if fitted}.
2
Odp Flowmeter/Metering Valve (FM3) {if fitted} to indicate a
2
Condumax II Sampling System -
NEC Compatible IOM Manual
PURGE POSITION (fully screwed in
CLOSED
/hour (3.3 to 5 Nl/min)
3
Normal Operating Position
97525, Issue 1, November
.
(fully