York YCUL0045E, Установка, эксплуатация и обслуживание

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JOHNSON CONTROLS
54
FORM 150.63-NM8 (1020)
INSTALLATION

4. Put the unit into Service Mode (as described under
the Control Service and Troubleshooting section)
and cycle each condenser fan to ensure proper rota-
tion.

5. Prior to this step, turn system 2 off (if applicable
–refer to Option 2 under “Unit Keys” section for
more information on system switches.)
Connect a
manifold gauge to system 1 suction and discharge
service valves.
Place the Unit Switch in the control panel to the
ON position.
As each compressor cycles on,
ensure that the discharge pressure rises and
the suction pressure decreases. If this does not
occur, the compressor being tested is operating
in the reverse direction and must be corrected.
After verifying proper compressor rotation, turn
the Unit Switch to “OFF.”
This unit uses scroll compressors
which can only operate in one direc -
tion. Failure to observe this will lead
to compressor failure.

6. YCUL0125 - YCUL0275 units only – Turn system
1 off and system 2 on (refer to Option 2 under
“UNIT KEYS” section for more information on
system switches.)
Place the Unit Switch in the control panel to the
ON position. As each compressor cycles “on,”
ensure that the discharge pressure rises and
the suction pressure decreases.
If this does not
occur, the compressor being tested is operating
in the reverse direction and must be corrected.
After verifying proper compressor rotation, turn
the Unit Switch to “OFF.”
The Discharged Air or Suction Pres -
sure setpoint may need to be temporar -
ily lowered to ensure all compressors
cycle “on.”

7. After verifying compressor rotation, return the
Unit Switch to the off position and ensure that
both Systems are programmed for “ON”
(refer
to Option 2 under “Unit Keys” section for more
information on system switches).
INITIAL START-UP
After the preceding checks have been completed and
the control panel has been programmed as required in
the pre-startup checklist, the chiller may be placed into
operation.

1. Place the Unit Switch in the control panel to the
ON position.

2. The first compressor will start and a flow of refrig -
erant will be noted in the sight glass. After several
minutes of operation, the vapor in the sight glass
will clear and there should be a solid column of
liquid when the TXV stabilizes.
OPTIONS
Display Language
Sys 1 Switch
Sys 2 Switch
* Ambient Control
Local/Remote Mode
Control Mode
Display Units
* Lead/Lag Control
* Fan Control
Manual Override
Current Feedback
** Soft Start
** Unit Type
** Refrigerant Type
** Expansion Valve Type Must be in TXV Mode
SETPOINTS
Discharge Air or Suction Pressure
Range
EMS-PWM Max. Setpoint
PROGRAM
Discharge Pressure Cutout
* Suct. Pressure Cutout
Low Amb. Temp. Cutout
Anti-Recycle Time
* Fan Control On Pressure
* Fan Differential Off Pressure
Total # of Compressors
* Number of Fans/System
* Unit/Sys Voltage
Unit ID
* Sys 1 Superheat Setpoint
* Sys 2 Superheat Setpoint
TABLE 12 – SETPOINTS ENTRY LIST
* NOT ON ALL MODELS
** VIEWABLE ONLY