1. ALL WORK SHALL CONFORM WITH ALL STATE AND ......1. ALL WORK SHALL CONFORM WITH ALL STATE AND...
2
1. ALL WORK SHALL CONFORM WITH ALL STATE AND ......1. ALL WORK SHALL CONFORM WITH ALL STATE AND LOCAL CODES. 2. CONTRACTOR SHALL OBTAIN AND PAY FOR ALL PERMITS, FEES AND TAXES. 3
1. ALL WORK SHALL CONFORM WITH ALL STATE AND LOCAL CODES.
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2. CONTRACTOR SHALL OBTAIN AND PAY FOR ALL PERMITS, FEES AND TAXES.
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3. EACH ITEM OF EQUIPMENT SHALL BE MOUNTED AND CONNECTED IN STRICT ACCORDANCE
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7. ALL EXISTING EQUIPMENT REMOVED SHALL BECOME THE PROPERTY OF THE OWNER AND
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SHALL BE REMOVED, STORED, OR DISPOSED OF AT THE DIRECTION OF THE OWNER.
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8. ALL OPENINGS IN ROOF, WALLS, CEILINGS AND FLOORS RESULTING FROM DEMOLITION
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MECHANICAL CONTRACTOR SHALL BE RESPONSIBLE FOR COORDINATION OF MECHANICAL
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EQUIPMENT'S ELECTRICAL REQUIREMENTS WITH THE ELECTRICAL CONTRACTOR. CON-
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TRACTOR ORIGINATED MODIFICATIONS TO THE MECHANICAL EQUIPMENT'S ELECTRICAL
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DESIGN" OR "PROTOTYPE" ELECTRICAL DATA, SHALL BE AT A COST TO THE MECHANICAL
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INSTALLATION, DUE TO DEVIATIONS FROM THE MECHANICAL EQUIPMENT "BASIS OF
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4. CONTRACTOR SHALL MAKE AN ON-SITE INSPECTION TO DETERMINE FULLY THE EXISTING
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5. LOCATION OF EQUIPMENT AND OTHER MECHANICAL WORK IS INDICATED DIA-
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GRAMMATICALLY BY THE DRAWINGS. DETERMINE EXACT LOCATIONS ON THE JOB SITE,
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SUBJECT TO STRUCTURAL CONDITIONS AND WORK OF OTHER CONTRACTORS.
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6. AFTER INSTALLATION AND START-UP, EACH ITEM OF EQUIPMENT SHALL BE THOROUGHLY
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CHECKED FOR VIBRATION TRANSMISSION TO THE STRUCTURE OR EXCESSIVE NOISE, AND
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IF EITHER OCCURS, THE CONTRACTOR SHALL BE RESPONSIBLE FOR CORRECTING THE
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FAULTY SITUATION IMMEDIATELY.
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SHALL BE CLOSED AND FINISHED TO MATCH THE SURROUNDING AREAS.
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CONTRACTOR.
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WITH MANUFACTURER'S RECOMMENDATIONS & SHALL BE U.L. LISTED, AS SPECIFIED.
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%%UGENERAL NOTES
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CONDITIONS AND THE EXTENT OF DEMOLITION.
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9.
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%%UROOFTOP 1,2,3 AND RAHU 1,2,3,4 UNITS DEMOLITION DRAWING NOTES:
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A
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B
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REMOVE EXISTING RTU AND RAHU UNITS. EXISTING ROOF CURBS SHALL REMAIN. EXISTING LOAD SIDE CONDUCTORS AND CONDUITS SHALL BE REMOVED TO THE DISCONNECTS. REMOVE EXISTING FUSED SAFETY SWITCHES FOR RTU AND RAHU UNITS. REMOVE EXISTING MOTOR STARTERS AND WEATHER TIGHT INCLOSURE ON RAHU 1,2,3,4. REMOVE GFCI SERVICE RECEPTACLE AT EACH ROOFTOP UNIT. REMOVE EXISTING GAS PIPE TO THE FIRST ELBOW ABOVE THE ROOF INCLUDING THE ISOLATION VALVE. REMOVE EXISTING PIPING IN RAHU'S FROM HOT WATER AND CHILLED WATER COILS TO BELOW THE ROOF LINE TO ACCOMMODATE PIPING TO THE NEW HOT WATER AND CHILLED WATER COILS IN PIPE BOX OF NEW UNITS. REMOVE EXISTING VIBRATION ISOLATION RAILS UNDER RTU'S IF ANY. ALL EXISTING ENERGY MANAGEMENT COMPONENTS AND WIRING SHALL BE IDENTIFIED, LABELED, AND DE-ENERGIZED. POWER TO THE COMPONENTS SHALL BE SHUT OFF AT EACH SYSTEM CONTROLLER. CONTROL CONTRACTOR SHALL COORDINATE ALL CONTROL DEMOLITION/INSTALLTION WORK WITH FCPS ENERGY MANAGEMENT DEPT. 48 HOURS BEFORE ANY WORK BEGINS, PLEASE CONTACT SERGHEI MALCOV @703.764.4373.
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UNIVERSAL INPUTS
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MIXED AIR TEMPERATURE
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UNIVERSAL OUTPUTS RTUS
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DDC POINT LIST
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B
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A
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MOUNT ALL NEW ROOFTOP AND RAHU UNITS ON NEW CURB ADAPTERS MANUFACTURED TO ACCOMMODATE EXISTING ROOF CURBS. CURB ADAPTER SHALL BE PAINTED WITH TWO COATS OF GRAY SHERWIN WILLIAM INDUSTRIAL ENAMEL HS WEATHER PROOF OUTDOOR PAINT. RAHU 1,2,3,4 CURB ADAPTERS SHALL BE MADE TO ALLOW PIPING TO EXTEND THROUGH THE ROOF INTO NEW PIPE BOX ON UNIT. NEW PIPING SHALL BE INSIDE OF THE CURB ADAPTER. NEW RAHU'S SHALL BE SUPPLIED WITH PIPE BOX MOUNTED ON SIDE OF THE UNIT. ALL PIPING SHALL BE EXTENDED UNDER THE ROOF LINE AND PIPED PER PIPING DETAIL. PROVIDE NEW CONDENSATE DRAIN AND TRAP FOR EACH NEW RTU AND RAHU UNIT. SEE CONDENSATE DRAIN DETAIL. PROVIDE NEW GFCI RECEPTACLE AT EACH RTU AND RAHU AND CONNECT THEM TO THE EXISTING WIRES AND CONDUIT ON THE ROOF. PROVIDE NEW GAS PIPING ON ROOF FOR ALL RTU'S WITH NEW ISOLATION VALVE. SAND AND PAINT THE EXISTING AND NEW GAS PIPE ON THE ROOF TO MATCH EXISTING COLOR. VACUUM INSIDE OF THE EXISTING TO REMAIN SUPPLY AND RETURN DUCTWORK ON THE ROOF TO THE FIRST ELBOW BELOW THE ROOF LINE. BALANCING CONTRACTOR SHALL BALANCE THE OUTDOOR AIR AND SUPPLY AIR QUANTITY FOR EACH RTU AND RAHU PER SCHEDULE, BALANCING CONTRACTOR SHALL ALSO BALANCE HOT WATER AND CHILLED WATER COILS ON RAHU UNITS. CONTACT THE CONTRACTOR AND OWNER IF DESIGNED AIRFLOW CAN'T BE ACHIEVED ON SITE. CONTRACTOR SHALL TIE DUCT SMOKE DETECTOR TO UNIT SHUTDOWN FOR ALL RTU'S AND RAHU UNITS. CONTRACTOR SHALL INFORM AND COORDINATE WITH FCPS FIRE ALARM SPECIALIST (GREG ROSE 703.898.5734) PRIOR TO STARTUP OF THE NEW RTU AND RAHU UNITS. FURNISH AND INSTALL ON ALL NEW RTUS AND RAHU UNITS A NEW F.S.S. WITH NEW FUSES SIZED PER MANUFACTURES RECOMMENDATION ON NEW FREE STANDING F.S.S. ROOF MOUNTING SYSTEM PER DETAIL. PROVIDE PITCH POCKET FOR ALL RTU'S AND RAHU'S ELECTRICAL STAND TO SUPPORT CONDUITS AND WIRING. THE NEW CONDUIT SHALL BE RUN UNDERNEATH THE ROOF AND COME UP NEAR THE NEW RTU. EXTEND POWER AND CONTROLS AS NECESSARY. SEE FREE STANDING SAFETY SWITCH ROOF MOUNTING DETAIL. ANY ROOFING WORK SHALL BE DONE BY THE FOLLOWING ROOFER. COLBERT ROOFING: CHRIS COLBERT 703.550.9171 NEW RTUS AND RAHUS SHALL BE IDENTIFIED BY ENGRAVED NAME TAG WITH THE TITLE OF THE EQUIPMENT AS TAKEN FROM THE PLANS IN A POSITION THAT IS CLEARLY VISIBLE. THE LETTERS SHALL BE NOT LESS THAN " HIGH. THE TITLES SHALL BE SHORT AND CONCISE. 12" HIGH. THE TITLES SHALL BE SHORT AND CONCISE.
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CONTROL CONTRACTOR SHALL REMOVE EXISTING CONTROL WIRES FROM THE UNITS WITHOUT CUTTING THEM AND LABEL EVERY CONTROL WIRE ON THE ROOF INSIDE THE NEW RTU. UPON COMPLETION, THE CONTROL CONTRACTOR SHALL VERIFY WITH FCPS TO MAKE SURE THAT ALL THE CONTROL POINTS WORK.
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B
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A
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C
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D
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CONTROL CONTRACTOR MUST CALL THE FOLLOWING PEOPLE AT THE FAIRFAX COUNTY PUBLIC SCHOOLS BEFORE ANY EXISTING CONTROL WIRES AND RELAYS ARE REMOVED: SERGHEI MALCOV @(703) 764-4373
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REPLACE ALL RELAYS, CURRENT SENSOR AND MIXED AIR SENSOR INSIDE THE OLD RTU WITH LIKE COMPONENTS. LABEL EACH POINT INSIDE RTU (LABEL RELAY SOCKETS, NOT RELAYS, AS TO DEVICE CONTROLLED/FUNCTION). EXTEND CONTROL WIRES AS NECESSARY.
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CONTRACTOR WILL RETAIN ONE OF THE FOLLOWING CONTROL CONTRACTORS:
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CONTROL UNLIMITED - MIKE LOONEY (703.897.4300) CKS BUILDING SERVICES INC. - CHRIS STEVENS (703.975.4990) METROPOLITAN CONTROLS - PAUL CABADA (443.532.5014)
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RTU-1,2,3, & RAHU-1,2,3,4
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SAF.STATUS (PROOF) D.I. NORM. OPEN
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THE FOLLOWING ITEMS MUST BE COMPLETED BY THE CONTRACTOR BEFORE ANY WORK COULD BE PERFORMED AT THE SCHOOL. PROVIDE TRADE PERMITS TO THE OWNER. SCHEDULE A PRE-CONSTRUCTION MEETING WITH THE PRINCIPAL AND THE OWNER. SUBMIT WRITTEN PROPOSAL FROM THE CONTROL SUB-CONTRACTOR WITH THE SCOPE OF WORK. CONTROL CONTRACTOR CAN NOT START THEIR WORK UNTIL MR. SERGHEI MALCOV (703.764.4373) HAS BEEN NOTIFIED. (703.764.4373) HAS BEEN NOTIFIED. HAS BEEN NOTIFIED.
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1
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2
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3
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NO SCALE
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%%UNOTE:
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4" O.C.
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HEAVY DUTY DISCONNECT SWITCH (WP)
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SECURED TO METAL FRAMING
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CHANNELS.
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GALVANIZED METAL FRAMING
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CHANNEL SECURED TO 2"
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RIGID STEEL CONDUIT
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SUPPORTS-TYPICAL
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RIGIDLY SECURE CONDUIT
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SUPPORTS TO BUILDING
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STRUCTURE (TOP AND
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SAFETY SWITCH BRANCH
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CIRCUIT FEED
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GFI DUPLEX RECEPTACLE (WP)
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SECURED TO METAL
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FRAMING CHANNEL
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2" RIGID STEEL CONDUIT
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SUPPORT WITH CAPS-
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(TYPICAL OF 2)
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LIQUID-TIGHT FLEXIBLE
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METAL CONDUIT TO
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ROOF MOUNTED
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EQUIPMENT
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PITCH POCKET
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BY ROOFING
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CONTRACTOR
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BUILT-UP ROOF
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BUILDING STRUCTURE
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CONTROL WIRING CONDUIT
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20"
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4'-6", MAXIMUM TO HANDLE
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BOTTOM CORDS)
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BRANCH CIRCUIT
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CONDUIT SUPPORT
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JUNCTION BOX (WP)
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FOR CONTROL WIRING CONDUIT
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1. LOCATE SAFETY SWITCH ADJACENT ROOF MOUNTED EQUIPMENT'S POWER CONNECTION POINT. 2. DO NOT BLOCK ANY EQUIPMENT'S REMOVABLE PANELS OR IMPEDE REQUIRED WORKING CLEARANCE. 3. ALL PARTS AND MATERIALS SHALL BE GALVANIZED AND SUITABLE FOR OUTDOOR USE. 4. CONTRACTOR SHALL USE RTV SILICONE GASKET TO SEAL ALL OPENINGS INTO DISCONNECT AT FASTENING POINTS.
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FREE STANDING SAFETY SWITCH ROOF MOUNTING DETAIL
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SHREVEWOOD ELEMENTARY
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FALLS CHURCH, VA 22043
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7525 SHREVE ROAD
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5025 SIDEBURN ROAD
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TEL.: 703-764-2423
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FAIRFAX, VIRGINIA 22032-2637
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OFFICE OF FACILITIES MANAGEMENT
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FAIRFAX COUNTY PUBLIC SCHOOLS
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FC
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PS
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DATE:
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SCALE:
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DRG #:
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SHEET:
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NOTED
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ME-1
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1 OF 1
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ROOFTOP UNIT REPLACEMENT
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MMB-104-18
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10/19/2017
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C
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INDOOR FAN DATA
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TONS
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TOTAL
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(CFM)
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CFM
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AREA
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SERVED
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O.A.
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MOCP
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ROOFTOP UNITS (GAS/DX HIGH EFFICIENCY) SCHEDULE
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SENSIBLE
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COOLING DATA
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(MBH)
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(IN.W.G.)
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(MBH)
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TOTAL
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E.S.P.
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STAGE
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(SEER/EER)
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MIN
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MIN
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VOLT/
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PH/CYCLES
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CKT AMP
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MINIMUM
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POWER SUPPLY
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BASIS OF DESIGN
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LBS
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WEIGHT
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UNIT
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7.5
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280
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0.75
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78.2
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57.6
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2
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12.0
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460/3/60
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19.90
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25
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1026.0
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MAIN OFFICE
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CAPACITY
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NAT. GAS HEATING (MBH)
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INPUT
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CAPACITY
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STAGES
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OUTPUT
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MIN.
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72
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59.2
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1
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TRANE
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YHC092
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20
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15
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4000
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1.4
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240
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180
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2
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11.0
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460/3/60
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48.00
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60
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CAFETERIA
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8200
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485
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388
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2
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YHD240
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1050
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1.0
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155.7
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117.3
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2
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12.1
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460/3/60
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33.00
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45
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2663.0
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LIBRARY
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4950
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225
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180
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2
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YHD180
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2400
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UNIT
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RTU-1
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RTU-2
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RTU-3
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2276.0
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C.
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A.
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B.
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D.
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E.
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F.
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G.
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H.
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I.
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PROVIDE BELT DRIVE FAN, MOTORIZED OUTSIDE AIR DAMPER, AND INTAKE HOOD (UNIT MOUNTED). PROVIDE COIL GUARDS (HAIL GUARDS AND SECURITY GRILLES) AND PHASE MONITOR WITH LINE AND LOAD MONITORING CAPABILITIES AND LCD DISPLAY. CONTROLS - PROVIDE STD CONVENTIONAL THERMOSTAT INTERFACE FOR HARDWIRE 2H/2C AND FAN CONNECTION. GAS HEAT - PROVIDE STAINLESS HEAT EXCHANGER. RTU-1,2,3: PROVIDE FACTORY INSTALLED AND CONTROLLED ENTHALPY COMPARISON ECONOMIZER WITH BAROMETRIC RELIEF CONTROLLED BY THE MANUFACTURER. BAROMETRIC RELIEF DAMPER PACKAGE SHALL INCLUDE DAMPER, SEALS, HARDWARE AND HOODS TO RELIEVE EXCESS INTERNAL PRESSURE. OUTSIDE DAMPER SHALL CLOSE DUE TO GRAVITY UPON UNIT SHUTDOWN. PROVIDE AND INSTALL BACNET MS/TP MODULE. THE MANUFACTURER SHALL CONFIGURE IN THE BACNET MODULE AND MADE AVAILABLE FOR FUTURE INTEGRATION. THE RTU WILL NOT BE CONTROLLED VIA BACNET AT THIS MOMENT. COMPRESSORS IN THE RTU SHALL BE INTERNALLY SPRING MOUNTED TO PROVIDE VIBRATION ISOLATION. UNIT MANUFACTURER SHALL FIELD VERIFY THE DIMENSIONS OF THE EXISTING SCREEN ENCLOSURE BEFORE SUBMITTING THE BID. THE OVERALL DIMENSIONS OF THE NEW UNITS SHALL FIT INSIDE THE EXISTING SCREEN ENCLOSURE. ANY NECESSARY MODIFICATIONS TO THE EXISTING SCREEN ENCLOSURE TO ACCOMMODATE THE CLEARANCE REQUIRED BY THE UNIT MANUFACTURER SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR. PROVIDE FACTORY INSTALLED HINGED ACCESS PANELS WITH HANDLES AND FACTORY STARTUP OF THE NEW RTU'S. PROVIDE HUMAN INTERFACE CONTROLLER FOR RTU'S- 1,2,3.
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COOLING OUTDOOR AMBIENT - 95F D.B., HEATING OUTDOOR AMBIENT - 10F D.B. FAN DATA INCLUDES LOSSES FOR FILTERS AND WET COILS COOLING CAPACITIES LISTED ARE GROSS CAPACITIES AND DO NOT DEDUCT FAN MOTOR HEAT EER LISTED IS AT ARI TEST CONDITIONS
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"H20
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OUTSIDE AIR CFM
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ROOFTOP RAHU UNIT SCHEDULE
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CHW
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HEATING COIL
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DEG.
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GPM
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LAT.
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EAT.
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LAT.
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WATER
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EAT.
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GPM
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VOLT
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PH/CYCLES
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FULL LOAD AMP
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POWER SUPPLY
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BASIS OF DESIGN
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LBS
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WEIGHT
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UNIT
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7900
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2"
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65%%DF
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24.3
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41%%DF
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24.7
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460/3/60
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14.22 AMPS
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2035.8
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3950
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MBH
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HEAT
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FLUID
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FLUID
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HEAT ENT
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HEAT LV
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287.47
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180%%DF
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156.75
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TRANE
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K14C1
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7850
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8200
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2"
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82%%DF
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65%%DF
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24.2
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24.6
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460/3/60
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14.22 AMPS
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3925
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286.52
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180%%DF
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156.73
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K14C1
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2"
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82%%DF
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65%%DF
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28.6
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25.7
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460/3/60
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14.22 AMPS
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2244.5
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4100
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312.51
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180%%DF
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155.71
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K17C1
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UNIT
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RAHU-1
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RAHU-2
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RAHU-3
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2035.8
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9500
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2"
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82%%DF
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65%%DF
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30.6
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29.8
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460/3/60
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14.22 AMPS
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2562.0
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4750
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371.56
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180%%DF
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155.09
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K21C1
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RAHU-4
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COOLING OUTDOOR AMBIENT - 95F D.B., HEATING OUTDOOR AMBIENT - 10F D.B. FAN DATA INCLUDES LOSSES FOR FILTERS AND WET COILS COOLING CAPACITIES LISTED ARE GROSS CAPACITIES AND DO NOT DEDUCT FAN MOTOR HEAT EER LISTED IS AT ARI TEST CONDITIONS
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UNIT
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NEW
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RTU-1
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RTU-2
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SIZE (AMP)
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NEW RTU'S & RAHU POWER WIRING, CONDUIT SIZE
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RTU-3
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#6
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#4
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#10
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AWG
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AWG
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3/4"
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UNIT
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NEW
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DISCONNECT
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WIRING SIZE
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30
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AWG
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1"
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3/4"
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30
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60
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CONDUIT SIZE
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H-1
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H-1
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H-1
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BREAKER PANEL
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BREAKER SIZE
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30 AMP
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60 AMP
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40 AMP
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EXISTING BREAKER PANEL
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EXISTING BREAKER PANEL
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RAHU-1
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RAHU-2
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RAHU-3
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RAHU-4
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20 AMP
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20 AMP
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20 AMP
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20 AMP
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HMDP
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HMDP
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HMDP
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HMDP
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CFM
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SUPPLY
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ESP
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82%%DF
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COOLING COIL
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74.55%%DF
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41%%DF
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41%%DF
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41%%DF
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74.65%%DF
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76.14%%DF
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77.06%%DF
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60
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30
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30
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30
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AWG
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AWG
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AWG
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AWG
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#12
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#12
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#12
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#12
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3/4"
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3/4"
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3/4"
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3/4"
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%%UROOFTOP 1,2,3 AND RAHU 1,2,3,4 UNITS NEW WORK DRAWING NOTES:
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C
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D
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E
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F
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G
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H
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I
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J
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K
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L
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F
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J.
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MBH
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TOTAL
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169.07
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158.61
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127.22
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127.98
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1.MAXIMUM COIL FACE VELOCITY FOR NEW COILS SHALL BE 550 F.P.M.
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PROVIDE %%UVARIABLE FREQUENCY DRIVE%%U FOR BELT DRIVE FAN, INTAKE AIR HOOD, OUTSIDE AIR AND RETURN AIR DAMPERS. OUTSIDE AIR DAMPER SHOULD BE ABLE TO HANDLE MINIMUM
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UNITS SHALL BE PROVIDED WITH SPRING ISOLATORS AND 2" PLEATED THROWAWAY FILTERS
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PROVIDE LINKAGE ON OUTDOOR AIR AND RETURN AIR DAMPERS
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PROVIDE FACTORY INSTALLED HINGED ACCESS PANELS AND FACTORY STARTUP OF THE NEW RAHU'S
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2.
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3.
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4.
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5.
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6.
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PROVIDE INSULATED PIPE CHASE
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7.
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8.
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UNITS SHALL BE PROVIDED WITH FACTORY FABRICATED ROOF CURB ADAPTORS
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ALL RAHU'S IN THIS SCHEDULE SHALL HAVE CHILLED WATER COOLING COILS AND HOT WATER HEATING COILS.
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FLOW
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AIR
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RETURN
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SUPPLY
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HEATING AND COOLING COIL PIPING DETAIL
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%%UCONDENSATE DRAIN
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ROOF LINE
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STATIC PRESSURE
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H
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X
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ROOF TOP UNIT
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H = 1" + STATIC PRESSURE
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X = 1/2 * H
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TOTAL HEIGHT OF TRAP = H + X + (1/2 * DIAMETER OF THE PIPE)
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CLEAN OUT
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UNION
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CLEAN OUT
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12"
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12"
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PIPE SUPPORT (TYP OF 2)
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ERICO PYRAMID50 BLOCKS (PROVIDE SEALANT TO THE ROOFING MATERIAL)
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SUPPLY FAN START/STOP
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GAS HEAT 1
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DX COOL 1
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DX COOL 2
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GAS HEAT 2
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O.A. DAMPER CMD
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UNIVERSAL OUTPUTS RAHUS
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SUPPLY FAN START/STOP
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O.A. DAMPER CMD
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HEATING VALVE CMD
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COOLING VALVE CMD
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PROVIDE NEW CONTROL VALVE, CONTROL ACTUATOR, BALANCING AND SHUT OFF VALVES FOR HOT WATER AND CHILLED WATER COILS IN EACH NEW RAHU UNIT. PER PIPING SIZE DETAIL.
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9.
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DEG.
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UNIT
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RAHU-1
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RAHU-2
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RAHU-3
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SUPPLY/RETURN PIPE SIZE FOR RAHU
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RAHU-4
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2" S 2" R
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2" S 2" R
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(FIELD VERIFY PIPING SIZE)
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CHILLED WATER SUPPLY (S)/RETURN (R) (INCH)
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HOT WATER SUPPLY (S)/RETURN (R) (INCH)
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2" S 2" R
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2" S 2" R
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2" S 2" R
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2" S 2" R
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2" S 2" R
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2" S 2" R
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%%URAHU PIPING SIZE DETAIL
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E
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D
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G
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M
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CFM AND 100%%% CFM.
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PROVIDE NEW FREEZE STATS ON CHILLED WATER COIL WIRED TO SHUT DOWN SUPPLY FAN WHEN TRIPPED.
