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Panel Checks
(Power ON – Both System Switches "OFF")
1. Apply 3-phase power and verify its value (See
Fig. 8 and 9 pages 35 and 36).
2. Apply 115VAC and verify its value on the ter-
minal block in the lower left of the Power Panel.
Make the measurement between terminals 5 and
2 (See Fig. 13, page 40). The voltage should be
115VAC +/- 10%.
3. Assure the heaters on each compressor are on.
Allow the compressor heaters to remain on a
minimum of 24 hours before start- up. This is
important to assure that no refrigerant is in the
compressor oil at start-up!
4. Program the dip switches on the microprocessor
board for the desired operating requirements. See
Fig. 49, Page 143. OPEN = Left side of switch
pushed down. CLOSED = Right side of switch
pushed down.
SWITCH
SWITCH "OPEN"
SETTING
1
Water Cooling
2
Standard Ambient
Control
3
Refrigerant R-407C
Verify the selections by pressing the OPTIONS
Key on the control panel. Check them off.
Damage to the chiller could result if
switches are improperly programmed.
Dip switches 4 through 8 are spares
and have no function.
JOHNSON CONTROLS
PROGRAMMED VALUES
SWITCH "CLOSED"
SETTING
Brine Cooling
Low Ambient
Control
Refrigerant R-22
5. Program the required operating values into the
micro for cut-outs, safeties, etc. and record them
in the chart below. See Page 160 for details.
If Default Values are desired for programming
convenience, press the PROGRAM key, 6140,
and ENTER. This loads default values. Record
these values in the chart below.
Refrigerant Type = __________________________
Dischg Press Cutout = ______________PSIG (kPa)
Disch Press Unld = ________________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
6. Program the Chilled Liquid Setpoint/Range and
record:
Setpoint = __________________ °F (°C)
Range = ________ to ________ °F (°C)
Keep in mind that the Target temperature dis-
played by the micro should equal the desired
leaving water temperature.
7. Assure that the CLK jumper J18 on the Micro-
processor Board is in the ON position (Top 2
pins).
8. Set the Time and Date.
9. Program the Daily Schedule start and stop times.
FORM 201.18-NM7
7
119
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