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manual rotation of the lead chiller and a stag-
gered restart of the chillers after a power fail-
ure. The lead/lag system shall include load
balancing if configured to do so.
H. Electrical Requirements:
1. Electrical contractor shall supply and install
main electrical power line, disconnect switches,
circuit breakers, and electrical protection
devices per local code requirements and as indi-
cated necessary by the chiller manufacturer.
2. Electrical contractor shall wire the chilled water
pump and flow, condenser water pump and
flow, and tower fan control circuit to the chiller
control circuit.
3. Electrical contractor shall supply and install
electrical wiring and devices required to inter-
face the chiller controls with the building control
system if applicable.
4. Electrical power shall be supplied to the unit at
the voltage, phase, and frequency listed in the
equipment schedule.
I. Piping Requirements — Instrumentation and Safeties:
1. Mechanical contractor shall supply and install
pressure gages in readily accessible locations in
piping adjacent to the chiller such that they can
be easily read from a standing position on the
floor. Scale range shall be such that design val-
ues shall be indicated at approximately mid-
scale.
2. Gages shall be installed in the entering and leav-
ing water lines of the cooler and condenser.
J. Vibration Isolation:
Chiller manufacturer shall furnish neoprene isolator
pads for mounting equipment on a level concrete
surface.
K. Start-Up:
1. The chiller manufacturer shall provide a factory-
trained representative, employed by the chiller
manufacturer, to perform the start-up proce-
dures as outlined in the Start-Up, Operation
and Maintenance manual provided by the
chiller manufacturer.
2. Manufacturer shall supply the following
literature:
a. Start-up, operation and maintenance
instructions.
b. Installation instructions.
c. Field wiring diagrams.
d. One complete set of certified drawings.
L. Special Features:
1. Soleplate Package:
Unit manufacturer shall furnish a soleplate
package consisting of soleplates, jacking
screws, leveling pads, and neoprene pads.
2. Spring Isolators:
Spring isolators shall be field furnished and
selected for the desired degree of isolation.
3. Spare Sensors with Leads:
Unit manufacturer shall furnish additional tem-
perature sensors and leads.
4. Sound Insulation Kit:
Unit manufacturer shall furnish a sound insula-
tion kit that covers the compressor housing,
motor housing, compressor discharge pipe,
suction line, evaporator, and economizer (if
equipped).
5. Stand-Alone Pumpout Unit:
A free-standing pumpout unit shall be provided.
The pumpout unit shall use a semi-hermetic
reciprocating compressor with liquid-cooled
condenser. Condenser liquid piping and
3-phase motor power shall be installed at the
jobsite by the installing contractor.
6. Separate Storage Tank and Pumpout Unit:
A free-standing refrigerant storage tank and
pumpout unit shall be provided. The storage
vessels shall be designed per ASME Section VIII
Division 1 code with 150 psig (1034 kPa)
design pressure. Double relief valves per ANSI/
ASHRAE 15, latest edition, shall be provided.
The tank shall include a liquid level gage and
pressure gage. The pumpout shall use a
hermetic reciprocating compressor with water-
cooled condenser. Condenser water piping and
3-phase motor power shall be installed at the
jobsite by the installing contractor.
7. Building Control System Interface (LON):
The chiller control system shall have the ability
to interface and communicate directly to the
building control using a LON based system. The
LonWorks Carrier Translator shall output data
in standard LON profiles.
8. Refrigerant Charge:
The chiller shall ship from the factory fully
charged with R-134a refrigerant and oil.
9. Thermal Insulation:
Unit manufacturer shall insulate the cooler
shell, economizer, suction elbow, motor shell
and motor cooling lines. Insulation shall be 1 in.
(25.4 mm) thick with a thermal conductivity not
exceeding
and shall conform to UL standard 94, classifica-
tion 94 HF-1.
10. Automatic Hot Gas Bypass:
Hot gas bypass valve and piping shall be
factory-furnished to permit chiller operation for
extended periods of time.
0.28
(Btu · in.)
(
0.0404
W
)
hr. Ft
2
F
m C
Guide specifications (cont)