American Hometec AHQ-TB32 Manual De Instalación Y Funcionamiento página 11

3) Take voltage readings from the Second L1 to the Second L2 you should
register 208 to 240 volts. If this is true, continue to the next step. If the reading
is low then both sides of this circuit are on the same phase (connected to the
same Hot Bus Bar) and the unit will not work. You must repair electric service
before installation.
4) Take voltage readings from the Third L1 to the Third L2 you should register
208 to 240 volts. If this reading is true, continue to the next step. If the reading
is low then both sides of this circuit are on the same phase (connected to the
same Hot Bus Bar) and the unit will not work. You must repair electric service
before installation.
5) Take voltage readings from Fourth L1 to the Fourth L2 you should register
208 to 240 volts. If this reading is true, continue to the next step. If the reading
is low then both sides of this circuit are on the same phase (connected to the
same Hot Bus Bar) and the unit will not work. You must repair electric service
before installation.
6) Take the voltage reading from L1 in the first circuit to the L2 of each of the
other circuits starting with the L2 in the second circuit; you should register 208
to 240 Volts. If this is true, continue to test the first L1 to the L2 in the third and
the fourth circuit. If any of these tests are not true the circuit of the L2 being
tested is out of Phase reverse the L1 and L2 of this circuit and retest the circuit.
You should get 208 to 240 Volts from the first L1 to second, third or fourth L2. If
it is true, your circuits are in Phase correctly. Turn off the circuit breakers and
proceed to "Start UP" section of the manual. Hint: keep the L1 and L2 of the
first circuit as is maintains a constant base to test all the other circuits to. Do
not reverse L1 and L2 in the first circuit or you will have changed your base and
will be once again be out of phase. Retest the electrical phasing once again
performing steps 1 through 6 repeatedly until correct.
Rule of Thumb: The voltage reading from any L1 to all other L2s should be 208
to 240 Volts. The Voltage reading between any L1 and any other L1 should be
low voltage. Similarly the reading between any L2 and any other L2 should be
low voltage. And any L1 or L2 to ground should have a voltage reading of
between 110 and 120 Volts.
CAUTION: Make sure all breakers are turned off before going to START UP.
11