36C26119B0015-009.pdf

NTS (CABLE BRACE OPTION)

NTS (CABLE BRACE OPTION)

NTS (SOLID BRACE OPTION)

SEISMIC RESTRAINT REQUIREMENTS

SEISMIC RESTRAINT GUIDELINES FOR SEISMIC DESIGN CATEGORY D:

1. SEISMIC BRACING SPECIFIED IN SPECIFICATIONS SECTION

"SEISMIC BRACING OF NON-STRUCTURAL COMPONENTS" IS

REQUIRED FOR ALL MECHANICAL SYSTEMS IN THIS PROJECT.

DETAILS INCLUDED HEREIN ARE FOR THE CONTRACTORS

REFERENCE TO PROVIDE GENERAL GUIDANCE TO THE EXTENT OF

THE BRACING NECESSARY. THE CONTRACTOR SHALL EMPLOY THE

SERVICES OF THE SEISMIC BRACING COMPONENT

MANUFACTURER'S SEISMIC ENGINEER FOR FINAL BRACING

DETAILS.

2. ALL MECHANICAL PIPING AND EQUIPMENT ON THIS PROJECT HAS A

COMPONENT IMPORTANT FACTOR OF 1.5 AND SHALL BE

SEISMICALLY BRACED UNLESS IT MEETS ONE OF THE FOLLOWING

EXCEPTIONS:

2.1. SEISMIC BRACES CAN BE EXCLUDED FROM HIGH

DEROMABILITY PIPING WITH A NOMIBAL PIPE SIZE OF 1 INCH

OR LESS WHERE PROVISIONS ARE MADE TO PROTECT THE

PIPING FROM IMPACT OF LARGER PIPING OR OTHER

EQUIPMENT

2.2. PIPING SUPPORTED BY ROD HANGERS PROVIDED THAT ALL

HANGERS IN THE PIPE RUN ARE 12 INCHES OR LESS IN LENGTH

FROM THE TOP OF THE PIPE TO THE SUPPORTING

STRUCTURE, HANGERS ARE DETAILED TO AVOID BENDING OF

THE HANGERS AND THEIR ATTACHMENTS, AND PROVISIONS

ARE MADE FOR PIPING TO ACCOMMODATE EXPECTED

DEFLECTIONS.

GENERAL SEISMIC BRACING NOTES:

1. SEISMIC BREAKING MAY CONSIST OF SOLID BRACING DESIGNED

TO ACCEPT LOADS IN TENSION AND COMPRESSION OR CABLE

BRACING DESIGNED TO ACCEPT TENSION LOADS ONLY. EACH

BRACE METHOD REQUIRES A VERTICAL HANGER AT OR WITHIN

4-INCHES OF HEIR ATTACHMENT TO THE MECHANICAL SYSTEM.

THE VERTICAL HANGER MAY OR MAY NOT REQUIRE STIFFENING OR

ADDITIONAL ANCHORAGE TO THE STRUCTURE.

2. EACH STRAIGHT PIPE OR DUCT RUN WITH TWO OR MORE

SUPPORTS REQUIRES A MINIMUM OF TWO TRANSVERSE BRACES.

3. EACH STRAIGHT PIPE OR DUCT RUN REQUIRES A MINIMUM OF ONE

LONGITUDINAL BRACE PARALLEL TO THE RUN.

4. TRANSVERSE AND LONGITUDINAL BRACES SHALL BE INSTALLED UP

TO 45 DEGREE BRACE ANGLE FROM THE HORIZONTAL OR (1)

BRACE HORIZONTAL AND (1) BRACE VERTICAL. BRACE SPACING

CAN BE REDUCED TO ALLOW BRACE DIFFERENT BRACE ANGLES

AT THE DISCRETION OF THE SEISMIC ENGINEER.

5. DO NOT MIX SOLID BRACING WITH CABLE BRACING IN THE SAME

DIRECTION.

6. DO NOT BRACE SYSTEM TO TWO DIFFERENT PARTS OF A BUILDING

WHICH MAY ACT DIFFERENTLY IN RESPONSE TO AN EARTHQUAKE.

FOR EXAMPLE, AVOID CONNECTING A TRANSVERSE BRACE TO A

WALL AND LONGITUDINAL BRACE TO A FLOOR OR ROOF AT SAME

BRACE LOCATION. ANY SYSTEM THAT CROSSES A BUILDING

SEISMIC JOINT MUST BE DESIGNED TO ACCOMMODATE 2 TIMES

THE JOINT WIDTH DISPLACEMENTS.

7. TRAPEZE HANGERS WITH MULTIPLE COMPONENTS ARE

DISCOURAGED BUT IF REQUIRED EACH MEMBER MUST BE

CLAMPED OR BOLTED TO THE TRAPEZE. MULTIPLE OR STACKED

TRAPEZES THAT SHARE SUPPORT RODS MUST BE BRACED

INDEPENDENTLY FROM ON ANOTHER.

8. THREADED ROD HANGERS DESIGNED TO CARRY GRAVITY LOADS

MAY REQUIRED ADDITIONAL ANCHORAGE OR STIFFENING AS

DETERMINED BY SEISMIC MANUFACTURER'S ENGINEER. THE USE

OF "C-CLAMPS" DESIGNED TO ATTACH THREADED ROD TO ONE

SIDE OF STEEL BEAM FLANGE FLANGE SHALL NOT BE USED

UNLESS THEY ARE PROVIDED WITH A RESTRAINING STRAP OR

HOOK TO THE OPPOSITE SIDE OF THE BEAM.

9. BRACING CABLES SHALL BE PRE-STRETCHED GALVANIZED 7X19

STRAND CORE AIRCRAFT CABLE WITH NO LIMIT TO THEIR

INSTALLED LENGTH. CABLE SHALL NOT BE DESIGNED TO SUPPORT

GRAVITY LOAD AND ONLY SLACK SHALL BE DUE TO THE CABLE'S

OWN WEIGHT.

MAXIMUM BRACE SPACING

OF STEEL METAL DUCTWORK

SEISMIC

ACCELERATION

INPUT (G)

MAXIMUM

TRANSVERSE

BRACE

SPACING-FT(M)

MAXIMUM

LONGITUDINAL

BRACE

SPACING-FT (M)

0.598 G

30 (9.1)

60 (18.2)

STEEL & COPPER PIPE

MAXIMUM BRACE SPACING

0.598 G

40 (12.2)

80 (24.4)

NO-HUB PIPE

MAXIMUM BRACE SPACING

0.598 G 20 (6.1)

40 (12.2)

SEISMIC

ACCELERATION

INPUT (G)

MAXIMUM

TRANSVERSE BRACE

SPACING-FT(M)

MAXIMUM

LONGITUDINAL

BRACE

SPACING-FT (M)

MAXIMUM

SEISMIC

ACCELERATION

INPUT (G)

MAXIMUM

TRANSVERSE BRACE

SPACING

FT(M)

MAXIMUM

LONGITUDINAL

BRACE

SPACING - FT (M)

NTS (CABLE BRACE OPTION)

ROD COUPLING

IF REQUIRED

SEISMIC CLAMP

IF REQUIRED

ROD STIFFENER ANGLE

IF REQUIRED

THREADED ROD

SWIVEL FASTNER

STEEL BRACE OR

STRUT CHANNEL

MAIMUM 9'-6" (2.9 m)

SEISMIC SOLID BRACE

CLEVIS CROSS BRACE

PIPE HANGER

SUPPORT ANCHORAGE

NOTE: 1, DESIGN RESTRAINING DEVICES (ANGLES & BOLTS) TO WITHSTAND

1.0 G LATERAL AND VERTICAL LOADS.

2. INSTALL LATERAL RESTRAINING DEVICES ON ALL SIDES OF EQUIPMENT BASE.

NOTE:

1. SNUBBERS SHALL BE DESIGNED TO WITHSTAND 1.0 G LATERAL AND VERTICAL

LOADS.

2. SNUBBERS SHALL BE SERIES Z-1001 AS MANUFACTURED BY MASON INDUSTRIES

INC. OR APPROVED EQUAL.

3. INSTALL 4 ALL-DIRECTION SNUBBERS THAT ARE DOUBLE ACTING AND LOCATED

AS CLOSE TO THE VIBRATION ISOLATORS AS POSSIBLE.

4. SNUBBERS SHALL CONSIST OF INTERLOCKING STEEL MEMBERS RESTRAINED BY

3/4" MIN, REMOVABLE NEOPRENE COMPOUNDED TO BRIDGE BEARING

SPECIFICATIONS.

5. SNUBBERS SHALL BE MANUFACTURED WITH AN AIR GAP BETWEEN STEEL AND

NEOPRENE OF NOT LESS THAN 1/8" NOR MORE THAN 1/4" .

RESILIENT PADS TO RETARD

IMPACT LOADS (TYP.)

EQUIPMENT

BASE

OPERATING GAP EQUAL TO HALF OF

STATIC DEFLECTION OF THE

ISOLATION MOUNTS (5/8" MAX.)

STEEL ANGLES TOP ANGLE MAY BE

WELDED IN FIELD TO ADJUST

OPERATING GAP OPERATING GAP

1/16" OVERSIZE HOLE OR

IF LARGER USE WASHER

AND WELD ALL AROUND

ANCHOR BOLTS OR

EXPANSION BOLTS

FLOOR

SIDE VIEW

( TYP.) VIBRATION ISOLATION ASSEMBLY

BOLTED TO EQUIPMENT BASE AND

STRUCTURAL SUPPORT

EQUIPMENT

BASE

ISOLATION MOUNTS SHALL BE DESIGNED

TO WITHSTAND 1.0 G LOADS IN THE

VERTICAL DIRECTION ONLY

OPERATING GAP EQUAL TO HALF

OF STATIC DEFLECTION OF THE

ISOLATION MOUNTS (5/8" MAX.)

RESILIENT PADS TO

RETARD IMPACT LOADS

(TYP.)

1/16" OVERSIZE HOLE OR IF

LARGER USE WASHER AND WELD

ALL AROUND

ANCHOR BOLTS OR

EXPANSION BOLTS

SIDE VIEW

FLOOR OR FLOOR MOUNTED EQUIPMENT W/VIBRATION ISOLATION

EQUIPMENT

BASE

FLOOR OR

ROOF

ANCHOR BOLT OR EXPANSION BOLT

NEOPRENE WASHER AND SLEEVE

STAINLESS STEEL BONDED PLATE

RESILIENT PAD DESIGNED FOR

1/4" MAX. STATIC DEFLECTION

ISOLATION ASSEMBLY SHALL BE DESIGNED TO

WITHSTAND 0.5 G LATERAL AND VERTICAL LOADS

EQUIPMENT RESTRAINED BY RESILIENT PADS OR NEOPRENE ISOLATORS

RESTRAINING DEVICES FOR LATERAL AND VERTICAL LOADS

EQUIPMENT RESTRAINED BY SNUBBERS

SUPPORT STRUCTURE

ROD COUPLING

IF REQUIRED

SEISMIC CLAMP

IF REQUIRED

ROD STIFFENER ANGLE

IF REUIRED

THREADED ROD

ANCHORAGE

AIRCRAFT CABLE

SEISMIC CABLE BRACE

PIPE CLAMP

PIPE HANGER

MAXIMUM 4 IN. (102 mm)

PIPE CLAMP MAY BE

ROTATED TO GAIN ACCESS

TO STRUCTURE ABOVE

THREADED ROD

ROD COUPLING

IF REQUIRED

SEISMIC CLAMP

IF REQUIRED

ROD STIFFENER ANGLE

IF REQUIRED

THREADED ROD

SWIVEL FASTNER

AIRCRAFT CABLE

SEISMIC CABLE BRACE HOOK

CLEVIS CROSS BRACE

PIPE HANGER

FLOOR

NOTE: 1, DESIGN RESTRAINING DEVICES (ANGLES & BOLTS) TO WITHSTAND

1.0 G LATERAL AND VERTICAL LOADS.

2. INSTALL LATERAL RESTRAINING DEVICES ON ALL SIDES OF EQUIPMENT BASE.

RESTRAINING DEVICES FOR LATERAL AND VERTICAL LOADS

FLOOR OR ROOF

SNUBBER

ASSEMBLY

VIBRATION

ISOLATION

ASSEMBLY

EQUIPMENT BASE

ANCHOR BOLTS OR

EXPANSION BOLTS

SIDE VIEW

Architecture, Engineering, and Sustainable Design design

AESUS

group

Architecture, Engineering, and Sustainable Design design

AESUS

group

Architecture, Engineering, and Sustainable Design design

AESUS

group

AHU CONTROL DIAGRAM

SEQUENCE OF CONTROLS

RUN CONDITIONS - REQUESTED:

THE UNIT SHALL RUN WHENEVER:

• ANY ZONE IS OCCUPIED.

• OR A DEFINABLE NUMBER OF UNOCCUPIED ZONES NEED HEATING OR COOLING.

EMERGENCY SHUTDOWN:

THE UNIT SHALL SHUT DOWN AND GENERATE AN ALARM UPON RECEIVING AN EMERGENCY SHUTDOWN SIGNAL.

FREEZE PROTECTION:

THE UNIT SHALL SHUT DOWN AND GENERATE AN ALARM UPON RECEIVING A FREEZESTAT STATUS.

HIGH/LOW STATIC SHUTDOWN:

THE UNIT SHALL SHUT DOWN AND GENERATE AN ALARM UPON RECEIVING AN HIGH OR LOW STATIC

SHUTDOWN SIGNAL.

RETURN AIR SMOKE DETECTION:

THE UNIT SHALL SHUT DOWN AND GENERATE AN ALARM UPON RECEIVING A RETURN AIR SMOKE DETECTOR STATUS.

SUPPLY AIR SMOKE DETECTION:

THE UNIT SHALL SHUT DOWN AND GENERATE AN ALARM UPON RECEIVING A SUPPLY AIR SMOKE DETECTOR STATUS.

AHU OPTIMAL START:

THE UNIT SHALL START PRIOR TO SCHEDULED OCCUPANCY BASED ON THE TIME NECESSARY FOR THE ZONES TO

REACH THEIR OCCUPIED SETPOINTS. THE START TIME SHALL AUTOMATICALLY ADJUST BASED ON CHANGES IN

OUTSIDE AIR TEMPERATURE AND ZONE TEMPERATURES.

SUPPLY FAN (12 FANS):

THE SUPPLY FANS SHALL RUN ANYTIME THE UNIT IS COMMANDED TO RUN, UNLESS SHUTDOWN ON SAFETIES. TO

PREVENT SHORT CYCLING, THE SUPPLY FANS SHALL HAVE A USER DEFINABLE (ADJ.) MINIMUM RUNTIME. SUPPLY

FANS SHALL RAMP UP AS ONE FAN.

ALARMS SHALL BE PROVIDED AS FOLLOWS:

• SUPPLY FAN FAILURE: COMMANDED ON, BUT THE STATUS IS OFF.

• SUPPLY FAN IN HAND: COMMANDED OFF, BUT THE STATUS IS ON.

• SUPPLY FAN RUNTIME EXCEEDED: STATUS RUNTIME EXCEEDS A USER DEFINABLE LIMIT (ADJ.).

SUPPLY AIR DUCT STATIC PRESSURE CONTROL:

THE CONTROLLER SHALL MEASURE DUCT STATIC PRESSURE AND MODULATE THE SUPPLY FAN VFD SPEED TO

MAINTAIN A DUCT STATIC PRESSURE SETPOINT. THE SPEED SHALL NOT DROP BELOW 30% (ADJ.). THE STATIC

PRESSURE SETPOINT SHALL BE RESET BASED UPON THE POSITION OF THE ZONE DAMPERS, WITH A GOAL OF

REDUCING THE STATIC PRESSURE UNTIL AT LEAST ONE ZONE DAMPER IS NEARLY WIDE OPEN.

• THE INITIAL DUCT STATIC PRESSURE SETPOINT SHALL BE 1.5IN H2O (ADJ.).

• IF NO ZONE DAMPER IS NEARLY WIDE OPEN, THE SETPOINT SHALL INCREMENTALLY RESET DOWN TO A

MINIMUM OF 1.3IN H2O (ADJ.) .

• AS ONE OR MORE DAMPERS NEARS THE WIDE OPEN POSITION, THE SETPOINT SHALL INCREMENTALLY RESET

UP TO A MAXIMUM OF 1.8IN H2O (ADJ.).

ALARMS SHALL BE PROVIDED AS FOLLOWS:

• HIGH SUPPLY AIR STATIC PRESSURE: IF THE SUPPLY AIR STATIC PRESSURE IS 25% (ADJ.) GREATER THAN

SETPOINT.

• LOW SUPPLY AIR STATIC PRESSURE: IF THE SUPPLY AIR STATIC PRESSURE IS 25% (ADJ.) LESS THAN SETPOINT.

• SUPPLY FAN VFD FAULT.

RETURN FANS (12 FANS):

THE RETURN FANS SHALL RUN WHENEVER THE SUPPLY FANS RUN. RETURN FANS SHALL RAMP UP AND DOWN AS

ONE FAN AND NOT BE STAGED.

ALARMS SHALL BE PROVIDED AS FOLLOWS:

• RETURN FAN FAILURE: COMMANDED ON, BUT THE STATUS IS OFF.

• RETURN FAN IN HAND: COMMANDED OFF, BUT THE STATUS IS ON.

• RETURN FAN RUNTIME EXCEEDED: STATUS RUNTIME EXCEEDS A USER DEFINABLE LIMIT (ADJ.).

• RETURN FAN VFD FAULT.

RETURN PLENUM STATIC PRESSURE CONTROL:

THE CONTROLLER SHALL MEASURE RETURN PLENUM STATIC PRESSURE AND MODULATE THE RETURN FAN VFD

SPEED TO MAINTAIN A RETURN PLENUM STATIC PRESSURE SETPOINT OF 0.2IN H2O (ADJ.). THE RETURN FAN VFD

SPEED SHALL NOT DROP BELOW 20% (ADJ.).

ALARMS SHALL BE PROVIDED AS FOLLOWS:

• HIGH RETURN PLENUM STATIC PRESSURE: IF THE RETURN AIR PLENUM STATIC PRESSURE IS 25% (ADJ.)

GREATER THAN SETPOINT.

• LOW RETURN PLENUM STATIC PRESSURE: IF THE RETURN AIR PLENUM STATIC PRESSURE IS 25% (ADJ.) LESS

THAN SETPOINT.

ENERGY RECOVERY - RUN-AROUND LOOP COILS:

THE CONTROLLER SHALL MODULATE THE RUN-AROUND LOOP MIXING VALVE FOR ENERGY RECOVERY AS FOLLOWS.

COOLING RECOVERY MODE:

THE CONTROLLER SHALL MEASURE THE RUN-AROUND LOOP COIL DISCHARGE AIR TEMPERATURE (DOWNSTREAM OF

THE OUTSIDE AIR COIL) AND MODULATE THE RUN-AROUND LOOP MIXING VALVE TO MAINTAIN A SETPOINT 2°F (ADJ.)

LESS THAN THE UNIT SUPPLY AIR TEMPERATURE SETPOINT. THE RUN-AROUND LOOP SHALL RUN FOR COOL

RECOVERY WHENEVER:

• UNIT RETURN AIR TEMPERATURE IS 5°F (ADJ.) OR MORE BELOW THE OUTSIDE AIR TEMPERATURE.

• AND THE UNIT IS IN A COOLING MODE.

• AND THE ECONOMIZER IS OFF.

• AND THE SUPPLY FAN IS ON.

HEATING RECOVERY MODE:

THE CONTROLLER SHALL MEASURE THE RUN-AROUND LOOP COIL DISCHARGE AIR TEMPERATURE (DOWNSTREAM

OF THE OUTSIDE AIR COIL) AND MODULATE THE RUN-AROUND LOOP MIXING VALVE TO MAINTAIN A SETPOINT

2°F (ADJ.) GREATER THAN THE UNIT SUPPLY AIR TEMPERATURE SETPOINT. THE RUN-AROUND LOOP SHALL RUN

FOR HEAT RECOVERY WHENEVER:

UNIT RETURN AIR TEMPERATURE IS 5°F (ADJ.) OR MORE ABOVE THE OUTSIDE AIR TEMPERATURE.

AND THE UNIT IS IN A HEATING MODE.

AND THE ECONOMIZER IS OFF.

AND THE SUPPLY FAN IS ON.

FROST PROTECTION:

THE RUN-AROUND LOOP PUMP SHALL RUN AND THE RUN-AROUND LOOP MIXING VALVE SHALL CLOSE TO 0% (ADJ.) IN

ORDER TO CIRCULATE WATER THROUGH THE RUN-AROUND LOOP EXHAUST AIR COIL WHENEVER:

• RUN-AROUND LOOP TEMPERATURE DROPS BELOW 33°F (ADJ.)

• OR THE EXHAUST AIR TEMPERATURE DROPS BELOW 30°F (ADJ.).

PREHEATING COIL VALVE:

THE CONTROLLER SHALL MEASURE THE MIXED AIR TEMPERATURE AND MODULATE THE PREHEATING COIL VALVE TO

MAINTAIN ITS SETPOINT 5°F (ADJ.) LESS THAN THE SUPPLY AIR TEMPERATURE SETPOINT.

THE PREHEATING SHALL BE ENABLED WHENEVER:

• OUTSIDE AIR TEMPERATURE IS LESS THAN 60°F (ADJ.).

• AND THE ECONOMIZER IS DISABLED.

• AND THE SUPPLY FAN STATUS IS ON.

THE PREHEATING COIL VALVE SHALL OPEN FOR FREEZE PROTECTION WHENEVER:

• MIXED AIR TEMPERATURE DROPS FROM 40°F TO 35°F (ADJ.).

• OR THE FREEZESTAT IS ON.

SUPPLY AIR TEMPERATURE SETPOINT - OPTIMIZED:

THE CONTROLLER SHALL MONITOR THE SUPPLY AIR TEMPERATURE AND SHALL MAINTAIN A SUPPLY AIR

TEMPERATURE SETPOINT RESET BASED ON ZONE COOLING AND HEATING REQUIREMENTS

THE SUPPLY AIR TEMPERATURE SETPOINT SHALL BE RESET FOR COOLING BASED ON ZONE COOLING REQUIREMENTS

AS FOLLOWS:

• THE INITIAL SUPPLY AIR TEMPERATURE SETPOINT SHALL BE 55°F (ADJ.).

• AS COOLING DEMAND INCREASES, THE SETPOINT SHALL INCREMENTALLY RESET DOWN TO A MINIMUM

OF 53°F (ADJ.).

• AS COOLING DEMAND DECREASES, THE SETPOINT SHALL INCREMENTALLY RESET UP TO A MAXIMUM OF

72°F (ADJ.) .

IF MORE ZONES NEED HEATING THAN COOLING, THEN THE SUPPLY AIR TEMPERATURE SETPOINT SHALL BE RESET

FOR HEATING AS FOLLOWS:

• THE INITIAL SUPPLY AIR TEMPERATURE SETPOINT SHALL BE 82°F (ADJ.).

• AS HEATING DEMAND INCREASES, THE SETPOINT SHALL INCREMENTALLY RESET UP TO A MAXIMUM OF

85°F (ADJ.).

• AS HEATING DEMAND DECREASES, THE SETPOINT SHALL INCREMENTALLY RESET DOWN TO A MINIMUM OF

72°F (ADJ.).

SEQUENCE OF CONTROLS (CONT.)

COOLING COIL VALVE:

THE CONTROLLER SHALL MEASURE THE SUPPLY AIR TEMPERATURE AND MODULATE THE COOLING COIL VALVE TO

MAINTAIN ITS COOLING SETPOINT.

THE COOLING SHALL BE ENABLED WHENEVER:

• OUTSIDE AIR TEMPERATURE IS GREATER THAN 60°F (ADJ.).

• AND THE ECONOMIZER IS DISABLED OR FULLY OPEN.

• AND THE SUPPLY FAN STATUS IS ON.

• AND THE HEATING IS NOT ACTIVE.

THE COOLING COIL VALVE SHALL OPEN TO 50% (ADJ.) WHENEVER THE FREEZESTAT IS ON.

ALARMS SHALL BE PROVIDED AS FOLLOWS:

• HIGH SUPPLY AIR TEMP: IF THE SUPPLY AIR TEMPERATURE IS 5°F (ADJ.) GREATER THAN SETPOINT.

LOW SUPPLY AIR TEMPERATURE ALARM:

THE CONTROLLER SHALL ALARM IF THE SUPPLY AIR TEMPERATURE IS LESS THAN 45°F (ADJ.).

ECONOMIZER:

THE CONTROLLER SHALL MEASURE THE MIXED AIR TEMPERATURE AND MODULATE THE ECONOMIZER DAMPERS IN

SEQUENCE TO MAINTAIN A SETPOINT 2°F (ADJ.) LESS THAN THE SUPPLY AIR TEMPERATURE SETPOINT. THE OUTSIDE

AIR DAMPERS SHALL MAINTAIN A MINIMUM ADJUSTABLE POSITION OF 20% (ADJ.) OPEN WHENEVER OCCUPIED.

THE ECONOMIZER SHALL BE ENABLED WHENEVER:

• OUTSIDE AIR TEMPERATURE IS LESS THAN 65°F (ADJ.).

• AND THE OUTSIDE AIR TEMPERATURE IS LESS THAN THE RETURN AIR TEMPERATURE.

• AND THE SUPPLY FAN STATUS IS ON.

THE ECONOMIZER SHALL CLOSE WHENEVER:

• MIXED AIR TEMPERATURE DROPS FROM 40°F TO 35°F (ADJ.).

• OR THE FREEZESTAT IS ON.

• OR ON LOSS OF SUPPLY FAN STATUS.

THE OUTSIDE AND EXHAUST AIR DAMPERS SHALL CLOSE AND THE RETURN AIR DAMPER SHALL OPEN WHEN THE UNIT

IS OFF. IF OPTIMAL START UP IS AVAILABLE THE MIXED AIR DAMPER SHALL OPERATE AS DESCRIBED IN THE OCCUPIED

MODE EXCEPT THAT THE OUTSIDE AIR DAMPER SHALL MODULATE TO FULLY CLOSED.

MINIMUM OUTSIDE AIR VENTILATION - FIXED PERCENTAGE:

THE OUTSIDE AIR DAMPERS SHALL MAINTAIN A MINIMUM ADJUSTABLE POSITION DURING BUILDING OCCUPIED HOURS

AND BE CLOSED DURING UNOCCUPIED HOURS.

HUMIDIFIER CONTROL:

THE CONTROLLER SHALL MEASURE THE RETURN AIR HUMIDITY AND MODULATE THE HUMIDIFIER TO MAINTAIN A

SETPOINT OF 50% RH (ADJ.). THE HUMIDIFIER SHALL BE ENABLED WHENEVER THE SUPPLY FAN STATUS IS ON.

THE HUMIDIFIER SHALL TURN OFF WHENEVER:

• SUPPLY AIR HUMIDITY RISES FROM 90% RH TO 95% RH (ADJ.).

• OR ON LOSS OF SUPPLY FAN STATUS.

ALARMS SHALL BE PROVIDED AS FOLLOWS:

• HIGH SUPPLY AIR HUMIDITY: IF THE SUPPLY AIR HUMIDITY IS GREATER THAN 90% RH (ADJ.).

• LOW SUPPLY AIR HUMIDITY: IF THE SUPPLY AIR HUMIDITY IS LESS THAN 30% RH (ADJ.).

PREFILTER DIFFERENTIAL PRESSURE MONITOR:

THE CONTROLLER SHALL MONITOR THE DIFFERENTIAL PRESSURE ACROSS THE PREFILTER.

ALARMS SHALL BE PROVIDED AS FOLLOWS:

• PREFILTER CHANGE REQUIRED: PREFILTER DIFFERENTIAL PRESSURE EXCEEDS A USER DEFINABLE LIMIT

(ADJ.).

FINAL FILTER DIFFERENTIAL PRESSURE MONITOR:

THE CONTROLLER SHALL MONITOR THE DIFFERENTIAL PRESSURE ACROSS THE FINAL FILTER.

ALARMS SHALL BE PROVIDED AS FOLLOWS:

• FINAL FILTER CHANGE REQUIRED: FINAL FILTER DIFFERENTIAL PRESSURE EXCEEDS A USER DEFINABLE LIMIT

(ADJ.).

MIXED AIR TEMPERATURE:

THE CONTROLLER SHALL MONITOR THE MIXED AIR TEMPERATURE AND USE AS REQUIRED FOR ECONOMIZER

CONTROL OR PREHEATING CONTROL .

ALARMS SHALL BE PROVIDED AS FOLLOWS:

• HIGH MIXED AIR TEMP: IF THE MIXED AIR TEMPERATURE IS GREATER THAN 90°F (ADJ.).

• LOW MIXED AIR TEMP: IF THE MIXED AIR TEMPERATURE IS LESS THAN 45°F (ADJ.).

RETURN AIR HUMIDITY:

THE CONTROLLER SHALL MONITOR THE RETURN AIR HUMIDITY AND USE AS REQUIRED FOR ECONOMIZER CONTROL

OR HUMIDITY CONTROL .

ALARMS SHALL BE PROVIDED AS FOLLOWS:

• HIGH RETURN AIR HUMIDITY: IF THE RETURN AIR HUMIDITY IS GREATER THAN 70% (ADJ.).

• LOW RETURN AIR HUMIDITY: IF THE RETURN AIR HUMIDITY IS LESS THAN 35% (ADJ.).

RETURN AIR TEMPERATURE:

THE CONTROLLER SHALL MONITOR THE RETURN AIR TEMPERATURE AND USE AS REQUIRED FOR SETPOINT CONTROL

OR ECONOMIZER CONTROL .

ALARMS SHALL BE PROVIDED AS FOLLOWS:

• HIGH RETURN AIR TEMP: IF THE RETURN AIR TEMPERATURE IS GREATER THAN 90°F (ADJ.).

• LOW RETURN AIR TEMP: IF THE RETURN AIR TEMPERATURE IS LESS THAN 45°F (ADJ.).

SUPPLY AIR TEMPERATURE:

THE CONTROLLER SHALL MONITOR THE SUPPLY AIR TEMPERATURE.

ALARMS SHALL BE PROVIDED AS FOLLOWS:

• HIGH SUPPLY AIR TEMP: IF THE SUPPLY AIR TEMPERATURE IS GREATER THAN 120°F (ADJ.).

• LOW SUPPLY AIR TEMP: IF THE SUPPLY AIR TEMPERATURE IS LESS THAN 45°F (ADJ.).

H L

TH

OA

BI - Freezestat

M

M

AO - Mixed Air Dampers

AI - Mixed Air Temp

AI - Return Air Temp

AO - Preheating Valve

HWS

HWR

RA

H L

BI - Return Air Smoke Detector

M

BO - Return Fan Start/Stop

BI - Return Fan Status

AO - Return Fan VFD Speed

BI - Return Fan VFD Fault

CT

VFD

H L

AI - Return Plenum Static Pressure

AI - Return Air Humidity

T

AI - Supply Air Temp

BI - Supply Air Smoke Detector

AI - Supply Air Humidity

AO - Humidifier

BO - Humidifier Enable

BI - High Static Shutdown

M

CT

VFD

BO - Supply Fan Start/Stop

BI - Supply Fan Status

AO - Supply Fan VFD Speed

BI - Supply Fan VFD Fault

AO - Cooling Valve

CHWS

CHWR

AI - Prefilter Differential Pressure

AI - Final Filter Differential Pressure

SA

Locate ¾ distance down longest duct

H

L

AI - Supply Air Static Pressure

H

STM

M

MM

M

EA

T

T

M

AI - Run-Around Loop Coil Discharge Air Temp

AI - Outside Air Temp

AI - Exhaust Air Temp

AI - Run-Around Loop Temp

AO - Run-Around Loop Mixing Valve

T

T

T T

SF

RF

N.C.

N.O.

N.C.

CHWHW

H L

GENERAL NOTES

1. CONTROLS CONTRACTOR SHALL ADD A LINK ON THE FRONT END THE SHOWS THE SEQUENCE OF OPERATION

AND CONTROLS DIAGRAM FOR THE EQUIPMENT INSTALLED IN THIS PROJECT. THE CLIENT SHALL HAVE THE

CAPABILITY TO SELECT THE EQUIPMENT AND REVIEW THE SOC AND DIAGRAM FOR THE EQUIPMENT.

2. ALL NEW CONTROLS TO COMMUNICATE WITH EXISTING EMS. FIELD INVESTIGATE EXISTING CONTROLS

EQUIPMENT TO DETERMINE CAPACITIES AND NETWORK LAYOUT PRIOR TO BID. SUBMIT DETAILED NETWORK

DIAGRAM AS REQUIRED BY SPECIFICATIONS.

3. PROVIDE CONTROL CABINET WHERE REQUIRED (SUITABLE FOR INTENDED LOCATION) COMPLETE WITH

POWER SUPPLIES, CONDUIT, SENSOR WIRING, COMMUNICATION WIRING AND RELATED HARDWARE AND

SOFTWARE. UNLESS NOTED OTHERWISE, THE BUILDING CONTROL SYSTEM SHALL BE CONNECTED TO

EMERGENCY POWER.

4. ALL SETPOINTS INDICATED SHALL BE ADJUSTABLE AT THE HOST COMPUTER WORKSTATION AND VIA A LAPTOP

COMPUTER CONNECTED TO ANY EMS CONTROL PANEL OR CONTROLLER. ACTUAL POINT NAMES SHALL

MATCH NAMING CONVENTION OF EXISTING EMS. POINT NAMES LISTED ON THE CONTROL DIAGRAMS ARE FOR

REFERENCE ONLY.

5. COORDINATE ALL SENSOR INSTALLATIONS WITH THE MECHANICAL CONTRACTOR AND SUBMIT PROPOSED

LOCATIONS ON PIPING COORDINATION DRAWING SUBMITTAL. COORDINATE TO INSURE THAT THE SENSOR

MANUFACTURER'S RECOMMENDED UPSTREAM AND DOWNSTREAM PIPE DIAMETERS ARE PROVIDED

(ESPECIALLY FLOW ELEMENTS AND TRANSMITTERS).

6. WHENEVER A UNIT IS SHUTDOWN BECAUSE OF ONE OF ITS SAFETIES, THE BAS SHALL RETAIN IN MEMORY THE

READING AND SET POINT OF EACH DEVICE TO HELP THE OPERATOR TO ISOLATE THE CAUSE OF THE

SHUTDOWN.

7. IF ANY LOCAL, TERMINAL, OR UNITARY CONTROLLER OR EQUIPMENT MANUFACTURER'S CONTROL SYSTEM

LOSES COMMUNICATION WITH THE BAS NETWORK, AN ALARM SHALL BE GENERATED BY THE BAS INDICATING

THE LOCATION OF THE FAULT.

8. UNLESS NOTED OTHERWISE, ALL CONTROL VALVES SHALL HAVE PROPORTIONAL CONTROL. NO

FLOATING-POINT CONTROLS SHALL BE ALLOWED. VALVES SHALL UTILIZE A 0-10 VDC CONTROL SIGNAL.

9. VFD'S SHALL BE CONNECTED TO THE EMS NETWORK THROUGH A DIRECT NETWORK CONNECTION AS WELL AS

THROUGH THE HARDWIRED POINTS INDICATED. IT IS THE RESPONSIBILITY OF THE EMS CONTRACTOR TO

COORDINATE AND ADAPT THE EMS NETWORK TO THE COMMUNICATIONS PROTOCOLS AVAILABLE FROM THE

VFD MANUFACTURER. THE FOLLOWING POINTS SHALL BE INTEGRATED INTO THE EMS: SPEED FEEDBACK, FREQUENCY OUTPUT, CURRENT, TORQUE, POWER, DC BUS VOLTAGE, OUTPUT VOLTAGE, KWH COUNTER, DRIVE TEMPERATURE, ALARMS, STATUSES

10. DUCT SMOKE DETECTORS PROVIDED AND INSTALLED BY THE FIRE ALARM CONTRACTOR (BELOW IN SPACE).

WIRE AND CONDUIT TO THE MOTOR CONTROLLER AND THE FACP BY THE FIRE ALARM CONTRACTOR. POWER

TO THE DETECTOR, WIRE, AND CONDUIT BY THE ELECTRICAL CONTRACTOR. COORDINATE WITH ELECTRICAL

PLANS AND FIRE ALARM CONTRACTOR FOR REQUIRED POWER.

11. VFD'S SHALL BE CONNECTED TO THE EMS NETWORK THROUGH A RS486 OR BACNET IP CONNECTION AS WELL

AS THROUGH THE HARDWIRED POINTS INDICATED. IT IS THE RESPONSIBILITY OF THE EMS CONTRACTOR TO

COORDINATE AND ADAPT THE EMS NETWORK TO THE COMMUNICATIONS PROTOCOLS AVAILABLE FROM THE

VFD MANUFACTURER.

12. CONTROLS SHALL BE SCHNEIDER ELECTRIC BUILDING AUTOMATION SERVER OR APPROVED EQUAL BY VA FT.

HARRISON ENGINEERING DEPARTMENT.

CONTROLS POINTS LIST