start type shall be provided for each compressor 70 kW 20 tons or larger.
Provide a minimum 100 mm 4 inch alarm bell and alarm bell circuit to
actuate bell in event of machine cutout on protective devices, except when
low-pressure cutout is used as an operating control. Provide system
capacity control to adjust chiller output to a minimum of [_____] percent
of full load capacity without cycling operating compressor and to
automatically recycle system on power interruption. Provide start-up and
head pressure controls to allow for system operation at all ambient
temperatures down to [_____] degrees C degrees F.
2.1.3.7
Motors and Starters
Provide [across-the-line magnetic] [reduced voltage] type motor starters
conforming with NEMA ICS 1 and NEMA ICS 2. Provide phase failure, over
voltage and low voltage protection. Provide induction electric motors
conforming with NEMA MG 1.
2.1.4
Absorption Chillers[/Heaters]
Absorption chiller[/heater] shall be designed, constructed, tested, and
rated in accordance with ARI 560 and shall meet the requirements of ASHRAE
15. Unit shall be capable of operating automatically and continuously
between 10 percent and 100 percent of full load. Unit shall include:
1.
Absorber
2.
3.
4. Generator - low stage generator for single-effect units and low and
high stage generator for double-effect units
5.
Solution heat exchangers
6.
Pumps for solution and refrigeration recirculation
7.
Controls
a.
Low temperature cut-out
b.
Provisions for interlocks to prevent or stop operation of the
chiller package upon failure of chilled water flow
c.
Means for electrically protecting pump motors included in the
package against thermal overload
d.
Chilled water[/heating] temperature controller
e.
Instrument panel
[f.
Burner controls and [gas] [oil] train safeties per UL Standards
795 Oil for Heating Equipment and 726 Oil for Direct-Fired Water
Chilling-Heating Units]
8.
Anticrystallization or automatic decrystallization equipment
9.
Miscellaneous
SECTION 15601N
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