Bard WPV48D, Руководство по установке

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Manual 2100-250
Page 4
MIS-380
WIRING
All electrical connections are made through the top of the unit. High voltage connections are made with wire
nuts to the factory-provided pigtail leads in the junction box. Low voltage connections are made to the terminal
strip mounted on the top of the unit. Refer to the wiring diagram for connecting the terminals.
MAIN POWER
Refer to the unit serial plate for wire sizing information and correct protection size. Each unit is marked with a
"Minimum Circuit Ampacity." This means that field wiring connections must be sized to carry that amount of
current. Each unit and/or wiring diagram is also marked "Use Copper Conductors Only," meaning the leads
provided are not suitable for aluminum wiring. Refer to the National Electric Code for complete current-
carrying capacity data on the various grades of wiring material.
The unit rating plate lists "Maximum Overcurrent Protective Device" that is to be used with the equipment.
This device may be a time delay fuse or HACR type circuit breaker. The correct size overcurrent protective
device must be used to provide for proper circuit protection and to avoid nuisance trips due to the momentary
high starting current of the compressor motor.
THERMOSTAT LOW VOLTAGE WIRING
A 24 volt terminal strip is mounted on top of the unit with an optional terminal board cover included with the unit
installation instructions. See Figure 3. Two types of thermostats are available: 1) Single stage heat, single
stage cool to operate the heat pump alone without backup duct style electric heaters. This thermostat is
equipped with a signal light to indicate when the unit is "locked out" because of the low temperature or high
pressure control. Refer to the wiring diagram 4091-810 for correct connection of the terminals. 2) Two stage
heat, single cool to operate the heat pump or duct heaters on heating or the heat pump on cooling. This
thermostat is also equipped with a signal light to indicate when the unit is "locked out" because of operation of
the low temperature or high pressure control. In addition, a second signal light tells when the unit has been
placed in Emergency Heat. Refer to the wiring diagram 4091-811, and to the wiring diagram packed with the
duct heater for correct connection of the low voltage terminals.
FIGURE 3
OPTIONAL TERMINAL BOARD COVER
Right Side
Left Side
Terminal Board
Terminal board cover packed
with installation instructions)
Remove screws from terminal
board. Place cover in position,
and reinstall screws to secure
cover to board