Panel Checks; Programmed Values - York YCAS0295EB Installation Operation & Maintenance

Technical Data
$
16.Assure that the Flow Switch is properly in-
stalled, wired correctly, and working.
$
17. Assure bolts through compressor feet to bottom
frame rails are removed.

PANEL CHECKS

(Power ON – Both System Switches "OFF")
$
1. Apply 3-phase power and verify its val ue (See
Fig. 9 and 10 pages 34 and 35).
$
2. Apply 115VAC and verify its value on the ter-
mi nal block in the lower left of the Power Pan el.
Make the mea sure ment between ter mi nals 5 and
2 (See Fig. 14, page 39). The voltage should be
115VAC +/- 10%.
$
3. Assure the heaters on each compressor are on.
Al low the compressor heaters to remain on a
min i mum of 24 hours before start- up. This is
im por tant to as sure that no re frig er ant is in
the com pres sor oil at start-up!
$
4. Program the dip switches on the mi cro pro ces sor
board for the desired operating re quire ments. See
Fig. 51, Page 139. OPEN = Left side of switch
pushed down. CLOSED = Right side of switch
pushed down.
SWITCH "OPEN"
SWITCH
SETTING
Water Cooling
1
Standard Ambient
2
Control
Refrigerant R-407C
3
Do Not Use
4
Do Not Use
5
Heat Recovery
6
Disabled
Expansion Valve
7
Thermostatic
Standard Options
8
Enabled
*Expansion valve electronic should always be selected when an
EEV is installed.
Verify the selections by pressing the OP TIONS Key on
the control panel. Check them off in the chart above.
Damage to the chiller could result
if switch es are im prop er ly pro-
grammed.
112
$

PROGRAMMED VALUES

SWITCH "CLOSED"
SETTING
Glycol Cooling
$
Low Ambient Control
Refrigerant R-22
YCAS
Motor Current
Averaging (Start-Up)
Disabled
Do Not Use
$
Expansion Valve
Electronic*
$
Do Not Use
$
$
5. Program the required op er at ing val ues into the
mi cro for cut-outs, safe ties, etc. and record them
in the chart be low. See Page 160 for details.
Record programmed values in the chart below.
Display Language = _________________________
Discharge Press Cutout = ___________PSIG (kPa)
Discharge Press Unload = ___________PSIG (kPa)
Suction Press Cutout = _____________PSIG (kPa)
High Amb Cutout = ___________________ °F (°C)
Low Amb Cutout = ____________________ °F (°C)
Leaving Chilled Liquid Temp Cutout = _____ °F (°C)
High Motor Current Unload = ____________ % FLA
Anti-Recycle Time = ____________________Secs
Local / Remote Mode = ______________________
Display Units = _________________________
Lead / Lag Control = ________________________
Power Failure Restart = _____________________
Suction Superheat Setpoint = __________ °F (°C)
6. Program the Chilled Liquid Setpoint/Range and
record:
Setpoint = __________________ °F (°C)
Range = +/- ________________ °F (°C)
Keep in mind that the setpoint temperature dis-
played by the micro should equal the de sired
leav ing wa ter tem per a ture.
7. Assure that the CLK jumper J18 on the Mi cro -
pro ces sor Board is in the ON position (Top 2
pins).
8. Set the Time and Date.
9. Program the Daily Schedule start and stop
times.
10.Check the Factory Service Mode programming
values, (See Section 8.9) assure they are correct,
and record the values below:
Refrigerant Type = __________________________
R407C Chiller Type = ________________________
Unit Type = _______________________________
FORM 201.19-NM7 (804)
YORK INTERNATIONAL