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4. ELECTRICAL WIRING

CAUTION:

Units with three phase compressors can be damaged by running backward

. Verify

correct compressor rotation by observing refrigerant pressure gauges at startup. Little or no gauge
movement indicates reverse rotation. Reverse any two leads in the power junction box.

Note:

Fan blower motor is single phase and not affected by lead connections.

4.1 Power Supply

Use properly sized wire. Install and connect unit in accordance with local codes. Unit must be grounded.
Size separate circuits to the BKP

and to the Remote Condenser.

4.2 24 VAC Control Wiring

Units Without Remote Condenser

A dehumidistat is supplied with the unit. It should be placed in the conditioned space away from heat
sources, entrance doors or any sources of humid air. It is recommended to place the dehumidistat at a
location where it could sense the average relative humidity of the space.

The dehumidistat is of the 24 V type and should be wired with T-stat 18 gauge, low voltage wire. (See
wiring diagram in unit control panel.)

Units with Remote Condensers

For operation of units with a remote condenser, both temperature and humidity are controlled. A 24V
thermostat and a 24V dehumidistat are supplied with the BKP AC

. Wire the controls with Thermostat

18 gauge low voltage wiring in accordance with the wiring diagrams.

NOTE:

The operation of the remote condenser is by an internal pressure switch. No control wiring is

needed to the outdoor condenser.

5. Charging The BKP

The BKP™ is charged with refrigerant 22. The charge amount is listed on the nameplate. It is important to
have exactly the right charge in the unit or damage to the compressor or refrigerant components may
occur. Due to the wide range of operation of the BKP™ it is highly recommended that the charge be
weighed in to the ounce.

5.1 Standard Unit

Standard units (Non AC Models) are factory charged and ready to run after installation and wiring. If the
charge is in question, first, recover the refrigerant in the system and weigh in the proper charge. If it is
determined that the unit has a refrigerant leak, the leak must be repaired. Even though the unit appears to
operate, as the refrigerant level drops the compressor will over heat and be damaged before the condition
is recognized. Repair the leak and replace the liquid filter dryer. Evacuate the system using a Micron
Gauge down to 400 microns. Valve off the vacuum pump and insure the vacuum does not rise above 700
microns. Then weigh in the charge using a scale accurate to 1 once.

5.2 AC Unit

The BKP

AC model is shipped in two sections which must be piped together, evacuated and then

charged as a unit. Evacuate the refrigerant system to 400 microns or below. Valve off the vacuum pump
and insure the micron level does not increase above 700 microns. For BKP

-AC units the system must

be evacuated from all three ports. This is due to the check valves used in the remote condenser. A 1/4 in.
flair Tee and an extra refrigeration hose can be used to double up the discharge hose.

Remove the extra