Bard WH-301 Manual De Usuario
Manual 2100-193O
Page
Page
15 of 26
WIRING — MAIN POWER
Refer to the unit rating plate for wire sizing information
and maximum fuse or “HACR Type” circuit breaker
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.
Depending on the installed KW of electric heat, there
may be two field power circuits required. If this is the
case, the unit serial plate will so indicate. All models
are suitable only for connection with copper wire. Each
unit and/or wiring diagram will be marked “Use Copper
Conductors Only”. These instructions must be adhered
to. Refer to the National Electrical Code (NEC) for
complete current carrying capacity data on the various
insulation grades of wiring material. All wiring must
conform to NEC and all local codes.
and maximum fuse or “HACR Type” circuit breaker
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.
Depending on the installed KW of electric heat, there
may be two field power circuits required. If this is the
case, the unit serial plate will so indicate. All models
are suitable only for connection with copper wire. Each
unit and/or wiring diagram will be marked “Use Copper
Conductors Only”. These instructions must be adhered
to. Refer to the National Electrical Code (NEC) for
complete current carrying capacity data on the various
insulation grades of wiring material. All wiring must
conform to NEC and all local codes.
The electrical data lists fuse and wire sizes (75ºC
copper) for all models, including the most commonly
used heater sizes. Also shown are the number of field
power circuits required for the various models with
heaters.
copper) for all models, including the most commonly
used heater sizes. Also shown are the number of field
power circuits required for the various models with
heaters.
The unit rating plate lists a “Maximum Time Delay
Relay 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 motor.
Relay 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 motor.
The disconnect access door on this unit may be locked to
prevent unauthorized access to the disconnect. To
convert for the locking capability, bend the tab located
in the bottom left hand corner of the disconnect opening
under the disconnect access panel straight out. This tab
will now line up with the slot in the door. When shut, a
padlock may be placed through the hole in the tab
preventing entry.
prevent unauthorized access to the disconnect. To
convert for the locking capability, bend the tab located
in the bottom left hand corner of the disconnect opening
under the disconnect access panel straight out. This tab
will now line up with the slot in the door. When shut, a
padlock may be placed through the hole in the tab
preventing entry.
WIRING — LOW VOLTAGE WIRING
230/208V, 1 phase and 3 phase equipment dual primary
voltage transformers. All equipment leaves the factory
wired on 240V tap. For 208V operation, reconnect from
240V to 208V tap. The acceptable operating voltage
range for the 240 and 208V taps are shown in Table 4:
voltage transformers. All equipment leaves the factory
wired on 240V tap. For 208V operation, reconnect from
240V to 208V tap. The acceptable operating voltage
range for the 240 and 208V taps are shown in Table 4:
If no motorized vent option is used, nine (9) wires
should be run from the thermostat subbase to the 24V
terminal board in the unit. A nine (9) conductor, 18
gauge copper color-coded thermostat cable is
recommended. If a motorized vent option is used,
terminal O1 on the unit low voltage terminal block will
also be used. This requires a ten (10) conductor
thermostat cable to be run. The connection points are
shown in Figure 10.
should be run from the thermostat subbase to the 24V
terminal board in the unit. A nine (9) conductor, 18
gauge copper color-coded thermostat cable is
recommended. If a motorized vent option is used,
terminal O1 on the unit low voltage terminal block will
also be used. This requires a ten (10) conductor
thermostat cable to be run. The connection points are
shown in Figure 10.
LOW VOLTAGE CONNECTIONS
These units use a grounded 24 volt AC low voltage
circuit.
circuit.
The "R" terminal is the hot terminal and the "C"
terminal is grounded.
terminal is grounded.
"G" terminal is the fan input.
"Y" terminal is the compressor input for cooling and
heat pump.
heat pump.
"B/W1" terminal is the reversing valve input. The
reversing valve must be energized for heating mode.
reversing valve must be energized for heating mode.
"R" terminal is 24 VAC hot.
"C" terminal is 24 VAC grounded.
"L" terminal is compressor lockout output. This
terminal is activated on a high or low pressure trip by the
electronic heat pump control. This is a 24 VAC output.
terminal is activated on a high or low pressure trip by the
electronic heat pump control. This is a 24 VAC output.
"W2" terminal is second stage heat (if equipped).
"01" terminal is the ventilation input. This terminal
energizes any factory installed ventilation option.
energizes any factory installed ventilation option.
"E" terminal is the emergency heat input. This terminal
energizes the emergency heat relay.
energizes the emergency heat relay.
TABLE 4
OPERATING VOLTAGE RANGE
NOTE: The voltage should be measured at the
field power connection point in the
unit and while the unit is operating at
full load (maximum amperage
operating condition.)
unit and while the unit is operating at
full load (maximum amperage
operating condition.)
P
A
T
E
G
N
A
R
V
0
4
2
6
1
2
-
3
5
2
V
8
0
2
7
8
1
-
0
2
2
LOW VOLTAGE CONNECTIONS
FOR DDC CONTROL
Fan Only
Energize G
Cooling Mode
Energize Y, G
Heat Pump Heating
Energize Y, G, B
2nd Stage Heating
Energize G, W2, Y, B/W1
(if employed)
Ventilation
Energize G, O1
Emergency Heat
Energize B, W2, E, G