23 81 00 VRF Systems.pdf

02-11

Research Building Brain Bank Project No. 526-25-101

238100-1

SECTION 23 81 00

VRF SYSTEMS

PART 1 - GENERAL

1.01 SYSTEM DESCRIPTION

A. The variable capacity, heat pump heat recovery air conditioning system shall be a Mitsubishi Electric CITY MULTI VRF (Variable Refrigerant

Flow) zoning system or equal.

B. The Y-Series system shall consist of outdoor unit, multiple indoor units, and Direct Digital Controls. The sum of connected capacity of all indoor air handlers shall range from 50% to 130% of outdoor rated capacity.

1.02 QUALITY ASSURANCE

A. The units shall be listed by Electrical Testing Laboratories (ETL) and bear the ETL label.

B. All wiring shall be in accordance with the National Electrical Code

(N.E.C.).

C. The units shall be manufactured in a facility registered to ISO 9001 and

ISO14001 which is a set of standards applying to environmental protection set by the International Standard Organization (ISO).

D. All units must meet or exceed the 2010 Federal minimum efficiency requirements and the proposed ASHRAE 90.1 efficiency requirements for

VRF systems. Efficiency shall be published in accordance with the DOE alternative test procedure, which is based on the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) Standards 340/360, 1230 and

ISO Standard 13256-1.

E. A full charge of R-410A for the condensing unit only shall be provided in the condensing unit.

1.03 DELIVERY, STORAGE AND HANDLING

A. Unit shall be stored and handled according to the manufacturer’s recommendation.

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1.04 CONTROLS

A. The control system shall consist of a low voltage communication network of unitary built-in controllers with on-board communications and a web-based operator interface. A web controller with a network interface card shall gather data from this system and generate web pages accessible through a conventional web browser on each PC connected to the network.

Operators shall be able to perform all normal operator functions through the web browser interface.

B. System controls and control components shall be installed in accordance with the manufacturer’s written installation instructions.

C. Furnish energy conservation features such as optimal start, night setback, request-based logic, and demand level adjustment of overall system capacity as specified in the sequence.

D. System shall provide direct and reverse-acting on and off algorithms based on an input condition or group conditions to cycle a binary output or multiple binary outputs.

E. Provide capability for future system expansion to include monitoring and use of occupant card access, lighting control and general equipment control.

F. System shall be capable of email generation for remote alarm annunciation.

G. Control system start-up shall be a required service to be completed by the manufacturer or a duly authorized, competent representative that has been factory trained in Mitsubishi controls system configuration and operation. The representative shall provide proof of certification for

Mitsubishi CMCN Essentials Training and/or CMCN Hands-On Training indicating successful completion of no more than two (2) years prior to system installation. This certification shall be included as part of the equipment and/or controls submittals. This service shall be equipment and system count dependent and shall be a minimum of one (1) eight (8) hour period to be completed during normal working hours.

H. Provide commissioning assistance for BACNET interface of VRF system to existing Johnson Controls Metasys system at hospital.

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1.05 WARRANTY

A. The units shall be covered by the manufacturer’s limited warranty for a period of one (1) year from date of installation. If the systems are:

1. designed by a certified CITY MULTI Diamond Designer,

2. installed by a contractor that has successfully completed the

Mitsubishi Electric three day service course, AND

3. verified with a completed commissioning report submitted to and approved by the Mitsubishi Electric Service Department, then the units shall be covered by an extended manufacturer’s limited warranty for a period of five (5) years from date of installation.

4. In addition the compressor shall have a manufacturer’s limited warranty for a period of seven (7) years from date of installation.

5. If, during this period, any part should fail to function properly due to defects in workmanship or material, it shall be replaced or repaired at the discretion of the manufacturer.

6. This warranty shall not include labor.

B. Manufacturer shall have a minimum of ten (10) years of HVAC experience in the U.S. market.

C. All manufacturer technical and service manuals must be readily available for download by any local contractor should emergency service be required. Registering and sign-in requirements which may delay emergency service reference are not allowed.

D. The CITY MULTI VRF system shall be installed by a contractor with extensive CITY MULTI install and service training. The mandatory contractor service and install training should be performed by the manufacturer.

PART 2 - PRODUCTS

2.01 OUTDOOR UNIT

A. General:

1. The outdoor unit shall be specifically used with compatible components. The outdoor units shall be equipped with multiple circuit boards that interface to the controls system and shall perform all functions necessary for operation. Each outdoor unit

238100-4 module shall be completely factory assembled, piped, wired and run tested at the factory.

2. All units requiring a factory supplied twinning kit shall be piped together in the field, without the need for equalizing line(s). If an alternate manufacturer is selected, any additional material, cost, and labor to install additional lines shall be incurred by the contractor.

3. Outdoor unit shall have a sound rating no higher than 60 dB(A) individually or 65 dB(A) twinned. Units shall have a sound rating no higher than 50 dB(A) individually or 55 dB(A) twinned while in night mode operation. If an alternate manufacturer is selected, any additional material, cost, and labor to meet published sound levels shall be incurred by the contractor.

4. Outdoor unit shall be able to connect to up to 50 indoor units depending upon model.

5. Both refrigerant lines from the outdoor unit to indoor units shall be insulated.

6. The outdoor unit shall have an accumulator with refrigerant level sensors and controls.

7. The outdoor unit shall have a high pressure safety switch, over-current protection and DC bus protection.

8. The outdoor unit shall have the ability to operate with a maximum height difference of 164 feet and have a total refrigerant tubing length of 3280 feet. The greatest length is not to exceed 541 feet between the outdoor unit and the indoor units without the need for line size changes or traps.

9. The outdoor unit shall be capable of operating in heating mode down to -4F ambient temperature or cooling mode down to 23F ambient temperature, without additional low ambient controls. If an alternate manufacturer is selected, any additional material, cost, and labor to meet low ambient operating condition and performance shall be incurred by the contractor.

10. The outdoor unit shall be provided with a manufacturer supplied 20 gauge hot dipped galvanized snow guard. The snow guard protects the outdoor coil surfaces from snow build-up in severe climates.

11. The outdoor unit shall have a high efficiency oil separator plus additional logic controls to ensure adequate oil volume in the compressor is maintained.

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B. Unit Cabinet:

1. The casing(s) shall be fabricated of galvanized steel, bonderized and finished.

C. Fan:

1. Each outdoor unit module shall be furnished with one direct drive, variable speed propeller type fan.

2. The fan motor shall have inherent protection, have permanently lubricated bearings, and be completely variable speed. The fan shall be factory set for operation under 0 in. WG external static pressure, but capable of normal operation under a maximum of 0.24

in. WG external static pressure via dipswitch.

3. The fan motor shall be mounted for quiet operation.

4. The fan shall be provided with a raised guard to prevent contact with moving parts.

5. The outdoor unit shall have vertical discharge airflow.

D. Refrigerant

1. R410A refrigerant shall be required for outdoor unit systems.

2. Polyolester (POE) oil shall be required. Prior to bidding, manufacturers using alternate oil types shall submit material safety data sheets (MSDS) and comparison of hygroscopic properties for alternate oil with list of local suppliers stocking alternate oil for approval at least two weeks prior to bidding.

E. Coil:

1. The outdoor coil shall be of nonferrous construction with lanced or corrugated plate fins on copper tubing.

2. The coil fins shall have a factory applied corrosion resistant blue-fin finish.

3. The coil shall be protected with an integral metal guard.

4. Refrigerant flow from the outdoor unit shall be controlled by means of an inverter driven compressor.

5. The outdoor coil shall include 4 circuits with two position valves for each circuit, except for the last stage.

F. Compressor:

1. Each outdoor unit module shall be equipped with one inverter driven scroll hermetic compressor. Non inverter-driven compressors, which

238100-6 cause inrush current (demand charges) and require larger wire sizing, shall not be allowed.

2. A crankcase heater(s) shall be factory mounted on the compressor(s).

3. The outdoor unit compressor shall have an inverter to modulate capacity. The capacity shall be completely variable with a turndown of 18%-4% of rated capacity, depending upon unit size

4. The compressor shall be equipped with an internal thermal overload.

5. The compressor shall be mounted to avoid the transmission of vibration.

G. Electrical:

1. The outdoor unit electrical power shall be 460 volts, 3-phase, 60 hertz.

2. The outdoor unit shall be capable of satisfactory operation within voltage limits of 414-506 volts.

3. The outdoor unit shall be controlled by integral microprocessors.

4. The control circuit between the indoor units, BC Controller and the outdoor unit shall be 24VDC completed using a 2-conductor, twisted pair shielded cable to provide total integration of the system.

2.02 4-WAY CEILING-RECESSED CASSETTE WITH GRILLE INDOOR UNIT

A. General:

1. The indoor unit shall be a four-way cassette style indoor unit that recesses into the ceiling with a ceiling grille. The indoor unit shall be factory assembled, wired and run tested. Contained within the unit shall be all factory wiring, piping, electronic modulating linear expansion device, control circuit board and fan motor. The unit shall have a self-diagnostic function, 3-minute time delay mechanism, an auto restart function, an emergency operation function and a test run switch. Indoor unit and refrigerant pipes shall be charged with dehydrated air before shipment from the factory.

B. Unit Cabinet:

1. The cabinet shall be a compact 22-7/16” wide x 22-7/16” deep so it will fit within a standard 24” square suspended ceiling grid.

2. The cabinet panel shall have provisions for a field installed filtered outside air intake.

238100-7

3. Four-way grille shall be fixed to bottom of cabinet allowing two, three or four-way blow.

C. Fan:

1. The indoor fan shall be an assembly with a turbo fan direct driven by a single motor.

2. The indoor fan shall be statically and dynamically balanced to run on a motor with permanently lubricated bearings.

3. The indoor fan shall consist of three (3) speeds, Low, Mid, and

High.

4. The indoor unit shall have an adjustable air outlet system offering

4-way airflow, 3-way airflow, or 2-way airflow.

5. The auto air swing vanes shall be capable of automatically swinging up and down for uniform air distribution.

D. Filter:

1. Return air shall be filtered by means of a long-life washable filter.

E. Coil:

1. The indoor coil shall be of nonferrous construction with smooth plate fins on copper tubing.

2. The tubing shall have inner grooves for high efficiency heat exchange.

3. All tube joints shall be brazed with phos-copper or silver alloy.

4. The coils shall be pressure tested at the factory.

5. A condensate pan and drain shall be provided under the coil.

6. The unit shall be provided with an integral condensate lift mechanism that will be able to raise drain water 19-3/4” inches above the condensate pan.

7. Both refrigerant lines to the indoor units shall be insulated in accordance with the installation manual.

F. Electrical:

1. The unit electrical power shall be 208/230 volts, 1-phase, 60 hertz.

2. The system shall be capable of satisfactory operation within voltage limits of 187-228 volts (208V/60Hz) or 207-253 volts (230V/60Hz).

G. Controls:

238100-8

1. This unit shall use controls provided by Mitsubishi Electric to perform functions necessary to operate the system.

2. Indoor unit shall compensate for the higher temperature sensed by the return air sensor compared to the temperature at level of the occupant when in HEAT mode. Disabling of compensation shall be possible for individual units to accommodate instances when compensation is not required.

3. Control board shall include contacts for control of external heat source. External heat may be energized as second stage with 1.8°F

– 9.0°F adjustable deadband from set point.

4. Indoor unit shall include no less than four (4) digital inputs capable of being used for customizable control strategies.

5. Indoor unit shall include no less than three (3) digital outputs capable of being used for customizable control strategies.

2.03 VERTICAL AIR HANDLER

A. General

1. The indoor unit shall be a vertical ducted indoor fan coil design with a fixed bottom return, a fixed vertical discharge supply, and a modulating linear expansion device. The unit shall have the capability to be mounted in either the vertical or horizontal (left position only) and have the capability to integrate into systems with various types of indoor units connected. The unit shall support individual control using DDC controllers.

B. Indoor Unit

1. The indoor unit shall be factory assembled, wired and run tested.

Contained within the unit shall be all factory wiring, piping, electronic modulating linear expansion device, control circuit board and fan motor. The unit shall have a self-diagnostic function, 3-minute time delay mechanism, and an auto restart function. Indoor unit and refrigerant pipes shall be charged with dehydrated air before shipment from the factory.

C. Unit Cabinet:

1. The cabinet shall be pre-painted, pre-insultated, 22 gauge galvanized steel.

D. Fan:

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1. The indoor unit fan shall be an assembly with a single direct drive fan with a high efficiency DC motor.

2. The indoor fan shall be statically and dynamically balanced and run on a motor with permanently lubricated bearings.

3. The indoor unit shall have a ducted air outlet system and ducted return air system.

4. The fan shall have 3-speeds with the capability to operate between

0.3-0.5 In.W.G. selectable.

E. Filter:

1. The contractor shall provide a field fabricated filter rack.

F. Coil:

1. The indoor coil shall be of nonferrous construction with smooth plate fins on copper tubing.

2. The tubing shall have inner grooves for high efficiency heat exchange.

3. All tube joints shall be brazed with phos-copper or silver alloy.

4. The coils shall be pressure tested at the factory.

5. A condensate pan and drain shall be provided under the coil.

6. The condensate shall be gravity drained from the fan coil.

7. Both refrigerant lines to the PVFY indoor units shall be insulated in accordance with the installation manual.

G. Electrical:

1. The unit electrical power shall be 208/230 volts, 1-phase, 60 hertz.

2. The system shall be capable of satisfactory operation within voltage limits of 187-228 volts (208V/60Hz) or 207-253 volts (230V/60Hz).

H. Controls:

1. This unit shall use controls provided by Mitsubishi Electric to perform functions necessary to operate the system. Please refer to

Part 5 of this guide specification for details on controllers and other control options.

2. Control board shall include contacts for control of external heat source. External heat may be energized as second stage with 1.8 degree F deadband from set point.

238100-10

2.04 CONTROLS

A. The CITY MULTI Controls Network (CMCN) shall be capable of supporting remote controllers, centralized controllers, an integrated web based interface, graphical user workstation, and system integration to

Building Management Systems via BACnet® and LonWorks®.

B. Electrical Characteristics

1. The CMCN shall operate at 30VDC. Controller power and communications shall be via a common non-polar communications bus.

2. Wiring:

a. Control wiring shall be installed in a daisy chain configuration from indoor unit to indoor unit, to the BC controller (main and subs, if applicable) and to the outdoor unit. Control wiring to remote controllers shall be run from the indoor unit terminal block to the controller associated with that unit.

b. Control wiring for the Smart ME remote controller shall be from the remote controller to the first associated indoor unit

(TB-5) M-NET connection. The Smart ME remote controller shall be assigned an M-NET address.

c. Control wiring for the Simple MA and Wireless MA remote controllers shall be from the remote controller (receiver) to the first associated indoor unit (TB-15) then to the remaining associated indoor units (TB-15) in a daisy chain configuration.

d. Control wiring for centralized controllers shall be installed in a daisy chain configuration from outdoor unit to outdoor unit, to the system controllers (centralized controllers and/or integrated web based interface), to the power supply.

e. The AG-150 and EB-50GU centralized controller shall be capable of being networked with other AG-150 and EB-50GU centralized controllers for centralized control.

3. Wiring type:

a. Wiring shall be 2-conductor (16 AWG), twisted, stranded, shielded wire as defined by the Diamond System Builder output.

b. Network wiring shall be CAT-5 with RJ-45 connection.

C. CITY MULTI Controls Network

238100-11

1. The CITY MULTI Controls Network (CMCN) consists of remote controllers, centralized controllers, and/or integrated web based interface communicating over a high-speed communication bus. The

CITY MULTI Controls Network shall support operation monitoring, scheduling, occupancy, error email distribution, personal web browsers, tenant billing, online maintenance support, and integration with Building Management Systems (BMS) using either

LonWorks® or BACnet® interfaces. The below figure illustrates a sample CMCN System Configuration.

CMCN System Configuration

CMCN: Remote Controllers

D. Centralized Controller (Web-enabled)

1. AG-150 Centralized Controller

a. The AG-150 Centralized Controller shall be capable of controlling a maximum of 50 indoor units across multiple CITY

MULTI outdoor units. The AG-150 Centralized Controller shall be approximately 7-1/2”x12” in size and shall be powered from a Power Supply Unit (PAC-SC51KUA). The AG-150 Centralized

Controller shall support system configuration, daily/weekly scheduling, monitoring of operation status, night setback settings, free contact interlock configuration and malfunction monitoring. The AG-150 Centralized Controller shall have five basic operation controls which can be applied to an individual

238100-12 indoor unit, a group of indoor units (up to 50 indoor units), or all indoor units (collective batch operation). This basic set of operation controls for the AG-150 Centralized Controller shall include on/off, operation mode selection (cool, heat, auto (R2/WR2-Series only), dry, and fan), temperature setting, fan speed setting, and airflow direction setting. Since the

AG-150 provides centralized control it shall be able to enable or disable operation of local remote controllers. In terms of scheduling, the AG-150 Centralized Controller shall allow the user to define both daily and weekly schedules with operations consisting of ON/OFF, mode selection, temperature setting, air flow (vane) direction, fan speed, and permit/prohibit of remote controllers.

AG-150 (Centralized Controller)

Item Description Operation Display

ON/OFF Run and stop operation.

Each

Block, Group or

Collectiv e

Each

Group or

Collecti ve

Operation

Mode

Switches between Cool/Dry/Auto/Fan/Heat.

(Group of Lossnay unit: automatic ventilation/vent-heat/interchange/normal ventilation)

Operation modes vary depending on the air conditioner unit.

Auto mode is available for the R2/WR2-

Series only.

Each

Block, Group or

Collectiv e

Each

Group

Temperatur e Setting

Sets the temperature from 57°F – 87°F depending on operation mode and indoor unit.

Each

Block, Group or

Collectiv e

Group

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Item Description Operation Display

Set

Temperatur e Range

Limit

The range of room temperature setting can be limited by the initial setting. The lowest limit temperature can be made higher than the usual (67°F) in cool/dry mode, while the upper limit temperature lower than the usual (83°F) in heat mode.

Each

Group

Each

Group

Fan Speed

Setting

Available fan speed settings depending on indoor unit.

Each

Block, Group or

Collectiv e

Each

Group

Air Flow

Direction

Setting

Air flow direction settings vary depending on the indoor unit model.

*1. Louver cannot be set.

*1 Each

Block, Group or

Collectiv e

Each

Group

Schedule

Operation

Annual/weekly/today schedule can be set for each group of air conditioning units.

Optimized start setting is also available.

*1. The system follows either the current day, annual schedule, or weekly, which are in the descending order of overriding priority.

Twenty-four events can scheduled per day, including ON/OFF, Mode, Temperature

Setting, Air Direction, Fan Speed and

Operation Prohibition.

Five types of weekly schedule (seasonal) can be set.

Settable items depend on the functions that a given air conditioning unit supports.

*2 Each

Block, Group or

Collectiv e

Group

238100-14

Item Description Operation Display

Optimized

Start

Unit starts 5 - 60 minutes before the scheduled time based on the operation data history in order to reach the scheduled temperature at the scheduled time.

Each

Block, Group or

Collectiv e

Each

Block, Group or

Collecti ve

Night

Setback

Setting

The function helps keep the indoor temperature in the temperature range while the units are stopped and during the time this function is effective.

Each

Group

Each

Group

Permit /

Prohibit

Local

Operation

Individually prohibit operation of each local remote control function (Start/Stop, Change operation mode, Set temperature, Reset filter).

*3. Centrally Controlled is displayed on the remote controller for prohibited functions.

Each

Block, Group or

Collectiv e

*3 Each

Group

Room Temp Displays the room temperature of the group. N/A Each

Group

Error

When an error is currently occurring on an air conditioner unit, the afflicted unit and the error code are displayed

*4. When an error occurs, the LED flashes. The operation monitor screen shows the abnormal unit by flashing it. The error monitor screen shows the abnormal unit address, error code and source of detection. The error log monitor screen shows the time and date, the abnormal unit address, error code and source of detection

N/A

*4 Each

Unit or

Collecti ve

238100-15

Item Description Operation Display

Ventilatio n

Equipment

This interlocked system settings can be performed by the master system controller.

When setting the interlocked system, use the ventilation switch the free plan

LOSSNAY settings between “Hi”, “Low” and

“Stop”.

When setting a group of only free plan

LOSSNAY units, you can switch between

“Normal ventilation”, “Interchange ventilation” and “Automatic ventilation”.

Each

Group

Each

Group

Multiple

Language

Other than English, the following language can be chosen. Spanish, French, Japanese, Dutch, Italian, Russian, Chinese, and

Portuguese are available.

N/A Collecti ve

External

Input /

Output

By using accessory cables you can set and monitor the following.

Input

By level: “Batch start/stop”, “Batch emergency stop”

By pulse: “batch start/stop”, “Enable/disable remote controller”

Output: “start/stop”, “error/Normal”

*5. Requires the external I/O cables (PAC-YG10HA-E) sold separately.

*5

Collectiv e

*5

Collecti ve

Free

Contact

Interlock

Control

Operation of indoor groups, general equipment or free contact outputs based on group(s) conditions or free contact(s) input states.

Each

Group, Output or

Collectiv e

N/A

b. All AG-150 Centralized Controllers shall be equipped with one

RJ-45 Ethernet port to support interconnection with a network

PC via a closed/direct Local Area Network (LAN).

c. The AG-150 Centralized Controller shall be capable of performing initial settings via the 9” high-resolution, 238100-16 backlit, color touch panel on the controller or via a PC using the AG-150 Centralized Controller’s initial setting browser.

E. Standard software functions shall be available so that the building manager can securely log into each AG-150 via the PC’s web browser to support operation monitoring, scheduling, error email, interlocking and online maintenance diagnostics. Additional optional software functions of personal browser for PCs and MACs and Tenant Billing shall be available. The Tennant Billing function shall require TG-2000 Integrated

System software in conjunction with AG-150 Centralized Controllers.

F. CMCN: System Integration

1. The CMCN shall be capable of supporting integration with Building

Management Systems (BMS).

G. BAC-HD150: BACnet® Interface

1. The Mitsubishi Electric Cooling & Heating BACnet® interface, BAC-

HD150, shall be compliant with BACnet® Protocol (ANSI/ASHRAE 135-

2004) and be Certified by the (BTL) BACnet® Testing Laboratories.

The BACnet® interface shall support BACnet Broadcast Management

(BBMD). The BACnet® interface shall support a maximum of 50 indoor units. Operation and monitoring points include, but are not limited to, on/off, operation mode, fan speed, prohibit remote controller, filter sign reset, alarm state, error code, and error address. Power

Supply (PAC-SC51KUA)

2. The power supply shall supply 24VDC (TB3) for the AG-150/EB-50GU centralized controller and 30VDC (TB2) voltage for the central control transmission.

PART 3 - EXECUTION

3.01 INSTALLATION

A. General:

1. Rig and install in full accordance with manufacturer’s requirements, project drawings, and contract documents. Refer to the manufacturer’s installation manual for full requirements.

B. Location:

238100-17

1. Locate indoor and outdoor units as indicated on drawings. Provide service clearance per manufacturer’s installation manual. Adjust and level outdoor units on support structure.

2. For climates that experience snowfall, mount the outdoor unit a minimum of 12” above the average snowfall line. In climates where this height requirement proves unfeasible, the outdoor units may be installed at the average snowfall line provided regular snow removal in the area surrounding the units keeps the snow line below the bottom of the units.

C. Components / Piping:

1. Installing contractor shall provide and install all accessories and piping for a fully operational system. Refer to manufacturer’s installation manual for full instructions.

2. Traps, filter driers, and sight glasses are NOT to be installed on the refrigerant piping or condensate lines.

3. Standard ACR fittings rated for use with R410A are to be used for all connections. Proprietary manufacturer-specific appurtenances are not allowed.

4. Refrigerant pipe for CITY MULTI shall be made of phosphorus deoxidized copper, and has two types.

a. ACR “Annealed”: Soft copper pipe, can be easily bent with human's hand.

b. ACR “Drawn Temper”: Hard copper pipe (Straight pipe), being stronger than Type-O pipe of the same radical thickness.

5. The maximum operation pressure of R410A air conditioner is 4.30 MPa

[623psi] . The refrigerant piping should ensure the safety under the maximum operation pressure. Refer to recommend piping specifications in Mitsubishi Electric’s engineering manual. Pipes of radical thickness 0.7mm or less shall not be used.

6. Flare connection should follow dimensions provided in manufacturer’s installation manuals.

D. Insulation:

1. Refrigerant lines, as well as any valves, shall be insulated end to end with ½” closed-cell pipe insulation for piping up to 1”in diameter, or ¾” for piping 1-1/8” and larger, with a thermal conductivity no greater than 0.27 BTU-in/hr sq.ft oF. If state or

238100-18 local codes require insulation other than that specified above, the greater insulation shall be used.

E. Electrical:

1. Installing contractor shall coordinate electrical requirements and connections for all power feeds with electrical contractor. Refer to Division 26 (Master Format 2004) or Division Section 16 (Master

Format 1995) for additional information.

F. Third Party Controls:

1. Installing contractor shall coordinate all BAS/BMS control requirements and connections with controls contractor.

END OF SECTION 23 81 00