Carrier 23XRV manual Guide specifications cont, H. Electrical Requirements

Guide specifications (cont)

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

0.28	(Btu · in.)	( 0.0404	W	)
	hr. Ft2 F		m C

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.

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