Справочник Пользователя для Bard w17a2

Manual 2100-581B 

Page  16 of 26

For improved start up performance wash the indoor coil 
with a dish washing detergent.

All W**A/W**L wall mounted air conditioner series 
models are supplied with a remote reset for the high and 
low pressure switch.  If tripped, this pressure switch may 
be reset by turning the thermostat off then back on again.

Scroll compressors, like several other types of 
compressors, will only compress in one rotational 
direction.  Direction of rotation is not an issue with 
single phase compressors since they will always start 
and run in the proper direction.

However, three phase compressors will rotate in 
either direction depending upon phasing of the power.  
Since there is a 50-50 chance of connecting power 
in such a way as to cause rotation in the reverse 

direction, verification of proper rotation must be made.  

Verification of proper rotation direction is made by 
observing that suction pressure drops and discharge 
pressure rises when the compressor is energized.  
Reverse rotation also results in an elevated sound level 
over that with correct rotation, as well as substantially 
reduced current draw compared to tabulated values.

Verification of proper rotation must be made at the 
time the equipment is put into service.  If improper 
rotation is corrected at this time, there will be no 
negative impact on the durability of the compressor. 
However, reverse operation for over one hour may have 
a negative impact on the bearing due to oil pump out.

All three phase compressors are wired identically 
internally.  As a result, once the correct phasing 

is determined for a specific system or installation, 
connecting properly phased power leads to the same 
Fusite terminal should maintain proper rotation 
direction.

The direction of rotation of the compressor may be 
changed by reversing any two line connections to the 
unit.

All units with three phase scroll compressors are 
equipped with a 3 phase line monitor to prevent 
compressor damage due to phase reversal.

The phase monitor in this unit is equipped with two 
LEDs.  If the Y signal is present at the phase monitor 
and phases are correct the green LED will light.

If phases are reversed, the red fault LED will be lit and 
compressor operation is inhibited.

If a fault condition occurs, reverse two of the supply 
leads to the unit.  Do not reverse any of the unit 
factory wires as damage may occur.

Applies to W42, W48, W60 and W70 models only.  The 
condenser fan motor on 230/208 volt, one and three 
phase, 60 HZ units is a two-speed motor that comes 
factory wired on high speed for peak performance.  If 
ambient conditions permit, it can be reconnected to 
low speed (red wire) for lower sound level.  See wiring 
diagram.  

50 HZ models must have fan wired on low speed.  
These models are factory wired on low speed. 

 1. Caution owner/operator to maintain clean air 

filters at all times.  Also, not to needlessly close off 

supply and return air registers.  This reduces airflow 
through the system, which shortens equipment 
service life as well as increasing operating costs.

  2. Check all power fuses or circuit breakers to be sure 

they are the correct rating.

  3. Periodic cleaning of the outdoor coil to permit full 

and unrestricted airflow circulation is essential.