Chromalox MicroTherm, Руководство по установке и эксплуатации

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6
HAZARD OF ELECTRIC SHOCK. Disconnect all
power before installing or servicing the heat
transfer system. This system must be installed
by a qualified person in accordance with Na-
tional Electric Code, NFPA 70. Failure to com-
ply can result in personal injury or equipment
damage. The heat transfer system must be ef-
fectively grounded to the grounding means
provided in control box in accordance with Na-
tional Electric Code.
Fusing or other over-current protection must be sup-
plied to the system by the user.
The unit is completely wired when shipped. The only
wiring necessary is to the blue colored terminals L1,
L2, L3, and the green and yellow colored ground. To
make these connections:
Figure 2.3 Power Connection Terminals
L1, L2, L3
1. Loosen the screw on the front electrical enclosure
door to unlock the latch.
2. Open the front electrical enclosure door. Using
90°C wire sized per National and local codes, run
each leg of the three phase supply power and
ground to the appropriate terminals as shown in
Figure 2.3.
3. A separate fused disconnect is required. Locate
this fused disconnect near the equipment. Codes
may require the location of disconnect in sight of
operation standing next to the equipment. Consult
applicable codes for details.
4. With power off, check the wiring connections by
tugging on the lines. Tighten all terminals in the
control area. These can loosen due to vibration in
shipping.
Pump Rotation Check
5. Close the front electrical enclosure door. Pull the
top cover off of the heat transfer system and locate
the pump motor.
6. Press the
START STOP
and
START STOP
buttons in quick succes-
sion. Watch the rotation on the pump motor to in-
sure it matches the label.
7. If rotation is incorrect, disconnect power to the
system and swap any two of the supply lines. Re-
peat rotation check.
ELECTRIC SHOCK HAZARD. Close the front
electrical enclosure door and retighten the
locking screw. This must be done to limit ac-
cess to high voltage components. Failure to
comply result in personal injury or equipment
damage.
Control Voltage Fusing
Figure 2.4 contains a 120V fuse for the control circuitry.
This fuse protects the control transformer and circuitry.
1. Should the fuse blow, an indicator will light on the
terminal block.
2. Disconnect power from the system.
3. Determine the cause of the blown fuse.
4. Replace with an equivalent fuse.
5. Reconnect power.
Figure 2.4 Control Voltage Fuse
Hydraulic Installation