Bard PH1224, Installation Instructions Manual

Page: 11 / 23

Manual 2100-344
Page
9
TABLE 6 – THERMOSTAT WIRE SIZE
r e m r o f s n a r T
A V
A L F
e r i W
e g u a G
h t g n e L m u m i x a M
t e e F n I
5 5 3 . 2 0 2
8 1
6 1
4 1
2 1
5 4
0 6
0 0 1
0 6 1
0 5 2
WIRING – MAIN POWER
Refer to the unit rating plate for wire sizing information and
maximum fuse size. Each outdoor unit is marked with a
“Minimum Circuit Ampacity”. This means that the field
wiring used must be sized to carry that amount of current. If
field installed heaters are added to the basic unit, a second
separate power supply circuit will be required. The heater
rating plate located adjacent to the basic unit rating plate
will show the appropriate circuit ampacity fuse size, etc.
(Also see “Electrical Data” on pages 2.) All models are
suitable for connection with copper wire only. These
instructions must be adhered to. Refer to the National
Electrical Code for complete current carrying capacity data
on the various insulation grades of wiring material.
The electrical specifications on page 2 lists fuse and wire
sizes (75° F copper) for all models including the most
commonly used heater sizes.
The unit rating plate lists a “Maximum Time Delay Fuse” or
“HACR” type circuit breaker that is to be used with the
equipment. The correct size must be used for proper circuit
protection and also to assure that there will be no nuisance
tripping due to the momentary high starting current of the
compressor.
WIRING – 24V LOW VOLTAGE CONTROL
CIRCUIT
Ten (10 ) wires should be run from thermostat subbase to
the 24V terminal board in the unit. A ten conductor,
18 gauge copper, color-coded thermostat cable is
recommended. The connection points are shown in
Figure 8.
FIGURE 8 – LOW VOLTAGE WIRING
MIS-1187