FORM 160.84-EG1 (617)
JOHNSON CONTROLS
65
Guide Specifications (Cont'd)
• KW Meter - The unit’s input power consumption will be measured and displayed
digitally via the unit’s control panel. The KW meter accuracy is typically +/- 3% of
reading. KW meter scale is 0 - 788 KW.
• KWh Meter – The unit’s cumulative input power consumption is measured and dis-
played digitally via the unit’s control panel. KWh meter scale is 0 – 999,999 kWh.
• Ammeter – Simultaneous three-phase true RMS digital readout via the unit control
panel. Six current transformers provide isolated sensing. Ammeter scale is 0 - 545
A RMS.
• Voltmeter – Simultaneous three-phase true RMS digital readout of input voltage and
motor voltage via the unit control panel. Voltmeter scale is 0 – 670 VAC.
• Elapsed Time Meter – Digital readout of the unit’s elapsed running time (0 – 876,600
hours, resetable) is displayed via the unit control panel.
EVAPORATOR
Evaporator shall be a shell and tube, hybrid falling-film type designed for 235 psig (16
barg) working pressure on the refrigerant side. Shell shall be fabricated from rolled carbon
steel plate with fusion welded seams; have carbon steel tube sheets, drilled and reamed
to accommodate the tubes; and intermediate tube supports spaced no more than four
feet apart. The refrigerant side shall be designed, tested and stamped in accordance with
ASME Boiler and Pressure Vessel Code, Section VIII-Division 1.
Tubes shall be high-efficiency, internally and externally enhanced type having plain cop-
per lands at all intermediate tube supports to provide maximum tube wall thickness at
the support area. Each tube shall be roller expanded into the tube sheets providing a
leak proof seal, and be individually replaceable. Water velocity through the tubes shall
not exceed 12 fps. A liquid level sight glass will be located on the side of the shell to aid
in determining proper refrigerant charge. A suction baffle eliminator will be located above
the tube bundle to prevent liquid refrigerant carryover to the compressor. The evaporator
shall have a refrigerant relief device sized to meet the requirements of ASHRAE 15 Safety
Code for Mechanical Refrigeration.
Water boxes shall be removable to permit tube cleaning and replacement. Stub-out water
nozzle connections having ANSI/AWWA C-606 grooves shall be provided. Waterboxes
shall be designed for 150 psi (10.3 bar) design working pressure and tested at 225 psig
(15.5 bar). Vent and drain connections with plugs will be provided on each water box. Low
flow protection shall be provided by a thermal-type flow sensor, factory mounted in the
water nozzle connection and wired to the chiller OptiView Control Center.
CONDENSER
Condenser shall be of the shell and tube type, designed for 235 psig (16 barg) working
pressure on the refrigerant side. Shell shall be fabricated from rolled carbon steel plate
with fusion welded seams; have carbon steel tube sheets, drilled and reamed to accom-
modate the tubes; and intermediate tube supports spaced no more than four feet apart.
The refrigerant side shall be designed, tested and stamped in accordance with ASME
Boiler and Pressure Vessel Code, Section VIII-Division 1. Tubes shall be high-efficiency,
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