8
HAZARD OF ELECTRIC SHOCK. The heat trans-
fer system must be grounded using grounding
means provided in control box and employing
wiring by a qualified electrician in accordance
with National Electric Code. Failure to comply
can result in electrical shock or electrocution.
HAZARD OF ELECTRIC SHOCK. Disconnect all
power before servicing the heat transfer sys-
tem. Failure to comply can result in electrical
shock or electrocution.
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 2.5 Power Connection Terminals
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 2.5.
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.
Pump Rotation Check:
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.
5. Close the front electrical enclosure door. Pull the
top cover off of the heat transfer system and locate
the top of the pump motor.
6. With the supply water connected, and adequate
pressure present, Press the
START
and
STOP
but-
tons in quick succession. Watch the rotation on the
pump motor to insure it matches the label on its
top.
7. If rotation is incorrect, disconnect power to the
system and swap any two of the supply lines. Re-
peat rotation check.
Close the front electrical enclosure door and
retighten the locking screw. This must be done
to limit access to high voltage components.
Failure to comply could lead to electric shock
or electrocution.
Control Voltage Fusing
Terminal block #1 (see Figure 2.5) 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.
Electrical Installation
Thermal Devices, Inc. Mount Airy, Maryland USA www.thermaldevices.com
Thermal Devices, Inc. Mount Airy, Maryland USA www.thermaldevices.com