Tweco 1000 Merlin(Dec2004) - Manual (Page 24)

INSTALLATION 3-6 Manual 0-2708
A. Using Shop Air
NOTE
The Two Stage Air Line Filter Assembly is to be
used when using shop air as the Plasma Gas.
An inline pneumatic dryer/evaporator type air filter, ca-
pable of filtering particulates to at least 5 microns with a
dew point of 35°F (1.7°C), is required when using air from
a compressor. This type filter will insure that moisture,
oil, dirt, chips, rust particles, and other contaminants from
the supply hose do not enter the torch. For highly auto-
mated applications, a refrigerated drier plus a particulate
filter may be used to chill the air to remove all moisture.
CAUTION
Excessive oil or moisture in compressed air will
reduce torch parts life and cutting performance and
may cause torch failure.
All Merlin 1000 Systems are supplied with a Two Stage
Air Line Filter attached to the rear of the Power Supply.
The following procedure is the recommended shop air
connection method:
Connect the air supply hose (see note) to the Air Line Filter
input port (IN) barb fitting and secure with a customer
supplied hose clamp.
A-02161
Air Supply Hose
(Customer Supplied)
Two-Stage
Air Filter
PLASMA GAS
SECONDARY
GAS
Barb Fitting
Figure 3-6 Supply Hose Connections
NOTE
The supply hose must be 1/4 inch (6.3 mm) mini-
mum inside diameter to provide adequate air flow.
B. Using High-Pressure Gas Cylinders
NOTES
Refer to the regulator manufacturer’s specifica-
tions for installation and maintenance procedures.
Refer to Section 6.05, System Options and Acces-
sories, or a listing of available high-pressure regu-
lators.
Do not use an air line filter with high pressure gas
cylinders.
1. Examine the cylinder valves to be sure they are clean
and free of oil, grease or any foreign material. Mo-
mentarily open each cylinder valve to blow out any
dust which may be present.
WARNING
Do not stand in front of the valve outlet when open-
ing.
2. Each cylinder must be equipped with an adjustable
high-pressure regulator capable of pressures up to 125
psi (8.6 bar) maximum and flows of up to 700 scfh
(328 lpm) for cutting or gouging.
CAUTION
Maximum input pressure to the internal regula-
tor on the Power Supply must not exceed 125 psi
(8.6 bar).
NOTE
A typical 50 lb. CO2 cylinder can deliver a con-
tinuous flow rate of 35 scfh (16.5 lpm). To obtain
the required flow rate for the torch, it may be nec-
essary to manifold several CO2 cylinders. Con-
tinuous flow requirements will depend on the spe-
cific application and duty cycle.