Delta Faucet DF-745 Manuel D’Utilisation
Installation, Start Up and Shut Down DF-745
15
Be sure to use a backup wrench when making all connections to the
aspirator.
aspirator.
4.1.1.2 Vacuum Pump
An optional vacuum pump can be purchased for those cases where there is insufficient gas
pressure or flow to operate the aspirator, or when the analyzer is installed in a portable cart
and connection to a continuous gas supply is inconvenient. See page 25 for information on
the installation of the optional vacuum pump.
pressure or flow to operate the aspirator, or when the analyzer is installed in a portable cart
and connection to a continuous gas supply is inconvenient. See page 25 for information on
the installation of the optional vacuum pump.
4.1.2 Pneumatic Pressure Line Connection - Optional
The pneumatic gas connection (required for the optional gas panel) is a 1/8 inch
compression fitting as shown in Figure 5 and requires 70 – 125 psig air or N2 pressure. For
ease of installation, the pneumatic feed line can be connected directly to the ¼ inch aspirator
source by way of a 1/8 inch adapter.
compression fitting as shown in Figure 5 and requires 70 – 125 psig air or N2 pressure. For
ease of installation, the pneumatic feed line can be connected directly to the ¼ inch aspirator
source by way of a 1/8 inch adapter.
4.1.3 Sample Gas Connections
4.1.3.1 Sample Gas Inlet Connection
Sample gas is connected to the analyzer via a ¼ inch male swivel VCR fitting labeled
Process Inlet at the rear of the instrument as shown in Figure 4. Sample pressure of 30 –
150 psig is required and is regulated internally.
Process Inlet at the rear of the instrument as shown in Figure 4. Sample pressure of 30 –
150 psig is required and is regulated internally.
Pre-purge the line by connecting to the analyzer (with a new VCR filter gasket) only finger
tight and flowing gas for 15 minutes. Then tighten the inlet fitting.
tight and flowing gas for 15 minutes. Then tighten the inlet fitting.
NOTE: A VCR filter gasket (supplied) should always be used to protect the gas delivery
system from any particulate matter that may have collected in the line.
system from any particulate matter that may have collected in the line.
When power is applied to the analyzer, the internal gas control valves will automatically go
to a state as determined by the user. See the section on Power Up Defaults on page 63 for
additional information.
to a state as determined by the user. See the section on Power Up Defaults on page 63 for
additional information.
NOTE: When received from the factory, if equipped with internal gas valves, the moisture
cell will be isolated with pressure in the system. See the sections on Moisture Gas Valves
Control on pages 38 for instructions on starting the gas flow through either sensor.
cell will be isolated with pressure in the system. See the sections on Moisture Gas Valves
Control on pages 38 for instructions on starting the gas flow through either sensor.
See Figure 9 for an overview of the gas flow through the analyzer.
See the section on Gas Pressure and Flow Settings on page 20 for important information on
plumbing and powering up the analyzer.
plumbing and powering up the analyzer.
4.1.3.2 Sample Gas Outlet Connection
The sample gas outlet connection is a ¼ inch compression fitting labeled Moisture Sensor
Outlet as shown in Figure 4. A ¼ inch stainless tube is connected from the analyzer sample
outlet to the Aspirator assembly. See Figure 3. Open the needle control valve (CCW) on
the top of the aspirator assembly completely. NOTE: If the Hydrogen Service Safety
System is included, the sample outlet line must be made of steel. See page 89 for additional
information.
Outlet as shown in Figure 4. A ¼ inch stainless tube is connected from the analyzer sample
outlet to the Aspirator assembly. See Figure 3. Open the needle control valve (CCW) on
the top of the aspirator assembly completely. NOTE: If the Hydrogen Service Safety
System is included, the sample outlet line must be made of steel. See page 89 for additional
information.