Tweco PAK 10 - Manual (Page 19)

Manual No. 0-0515 7 Installation
5. Check the three phase power service to be used.
Recommended fuse or circuit breaker sizes are given
in Table 2-A.
Power
Trans-
former Line
Voltages
Accepted
Fuse or
Circuit
Breaker
Amperes
Recommended
Minimum
Primary
Wire size *
1
208
230
460 80
60
30 4
6
10
2
230
460
575 60
30
25 6
10
10
3
380
415
460 40
40
30 8
10
10
4
380
460
500 40
30
30 8
10
10
5
220
380
500 60
40
30 6
8
10
6
180
200
220 90
80
60 4
6
6
* From the National Electric Code, 1978
Table 2-A Line Voltages, Circuit Protection &
Recommended Wire Size
NOTE
Larger wires may be required if the length is over
25 feet.
6. With the primary power disconnect switch open,
connect the electrical ground and primary power
leads to the terminals on the upper right hand side
(facing the unit from the front.) Recommended wire
sizes are given in Table 2-A. The leads are led
through the “INPUT” fitting in the back (1, Figure
2-E). A proper ground connection must be made to
the brass stud as shown (2, Figure 2-D). The other
leads are attached to terminals L1, L2, and L3 (1,
Figure 2-D).
WARNING
Do Not Turn on Power Until Step 10.
7. Connect the gases to be used to the fittings on the
back of the unit (2 & 3, Fig. 2-E). Pressure regula-
tors for use with PAK units and specifically cali-
brated for use with nitrogen (Cat. #9-2722), argon/
hydrogen (Cat. #9-3053), carbon dioxide (Cat. #9-
2759), and compressed air (Cat. #9-3022) are avail-
able from Thermal Dynamics. The gas supplies
must be equipped with adjustable pressure regula-
tors capable of being set between 0 and 60 psi (0-4.1
bar) and of delivering 15 Standard Cubic Feet per
Hour (SCFH) (7 lpm) of N2 and 250 SCFH (118 lpm)
of C0
2
or compressed air.
1
2
A-03359
1. Primary Lead Terminals
2. Ground Terminal
Figure 2-D Primary Lead Connections