Thermal Dynamics SIGNATURE PAK 1250XRTM, Руководство пользователя

Страница: 24 / 68

12
2.3 INSTALLATION (continued)
INSTALLATION
1. Units with 200/220V transformers are factory-wired for
220V input. If actual input power to the unit is less than
210V it is recommended that the unit be rewired to the
low voltage taps on the transformers. 380/415V units
are factory-wired for 415V input and should similarly
be rewired if input voltage falls below 390V.
Input Power Connections
Figure 2-E Contactor Connections
CAUTION Disconnect primary power to the system before starting
the low-voltage change-over procedure.
a. Remove side panels from power supply.
b. Locate the three unused low voltage taps (labeled
105L, 106L and 107L) on the main transformers T1,
T2, and T3. The low voltage leads are color-coded
yellow.
c. Remove the tie wraps securing the insulated sleeving
on the low voltage taps.
d. Remove the high voltage transformer taps (color-
coded red) from contactors W1, W2, and W3.
The unused transformer taps must be properly insulated
to prevent possible shock to the operator or damage to
the equipment.
e. Use tie wraps to securely enclose the unused high
voltage taps in the insulated sleeving from the low
voltage taps. Secure the high voltage taps onto the
transformer where the low voltage taps were origi-
nally placed.
f. Install the low voltage taps in the contactors as
shown in Figure 2-E.
g. Reinstall side panels.
To avoid damage to the unit, always make sure all three
contactors are rewired at the same time.
Low Voltage
Change-over
Procedure
CAUTION
WARNING