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RTU -1 AIR HANDLING UNIT CONTROL SEQUENCE
THE AIR HANDLING UNIT (AHU) SUPPLY FAN SHALL BE STARTED AND STOPPED THROUGH A HAND -OFF -AUTO SWITCH. WHEN
THE SWITCH IS IN THE AUTO MODE, THE UNIT SHALL START AND STOP ACCORDING TO AN ADJUSTABLE TIME SCHEDULE BY
THE BUILDING AUTOMATION SYSTEM (BAS) WITH AN INTERFACE PANEL LOCATED IN THE BUILDING. UPON "START" COMMAND,
THE CONTROL SYSTEM SHALL BE ACTIVATED, THE OUTSIDE AIR DAMPER WILL OPEN AND INTERLOCKED EXHAUST FANS SHALL
START. WHEN CONFIRMED OPEN, THE SUPPLY AIR FAN WILL START AND RUN CONTINUOUSLY. DAMPERS THAT FAIL TO OPEN
SHALL BE INDICATED BY ALARM. INTERLOCKED FANS THAT FAIL TO START SHALL BE INDICATED BY ALARM.
DUCT MOUNTED REHEAT COILS SHALL BE TIED IN TO THE ON BOARD CONTROLLER. SPACE TEMPERATURE CONTROL SHALL
BE WITH WALL MOUNTED THERMOSTATS.
A DISCHARGE AIR TEMPERATURE SENSOR SHALL MODULATE THE AHU COMPRESSORS TO MAINTAIN SET -POINT (ADJUSTABLE)
TEMPERATURE. THE DISCHARGE AIR TEMPERATURE SHALL BE RESET FOR ENERGY CONSERVATION BASED ON FEEDBACK FROM
SYSTEM REHEAT COIL THERMOSTATS. HOWEVER, HUMIDITY SENSORS IN THE DISCHARGE AIR SHALL LOAD COMPRESSORS TO
MAINTAIN HUMIDITY CONTROL (ADJUSTABLE). "EVAPORATOR DEFROST" OR EQUIVALENT SHALL ALLOW OPERATION AT LOW
CAPACITY.
FILTER PRESSURE DROP SHALL BE MEASURED AND ALARM THE CONTROL SYSTEM IF THE DROP IS EXCESSIVE (ADJUSTABLE).
WHEN THE UNIT IS OFF, THE FOLLOWING SHALL OCCUR:
A. OUTSIDE AIR DAMPERS SHALL CLOSE.
B. THE SUPPLY FAN SHALL STOP.
C. THE CONTROL SYSTEM SHALL BE DE- ENERGIZED.
D. INTERLOCKED EXHAUST FANS SHALL STOP.
E. ALL OUTPUTS SHALL BE EQUIPPED WITH LOCAL /REMOTE SWITCHES AND ON /OFF PUSHBUTTONS OR GRADUAL SWITCHES
TO FACILITATE TROUBLESHOOTING.
AIR HANDLER CONTROL SEQUENCE
DX ROOF -TOP A/C UNIT SCHEDULE
ELECTRIC
REHEAT COIL SCHEDULE
ALL LOSSES IN DUCT SYSTEM
GENERAL NOTES:
MAINTAIN SERVICE CLEARANCES AS SHOWN ON DRAWINGS
E.P. - EMERGENCY POWER
UNIT ACCESSORIES:
O1 - MOTORIZED INLET VANES ON SUPPLY & 80 - ROOF CURB WITH
UNIT ACCESSORIES:
O1 - PROVIDE WITH SCR CONTROLLERS
O2 - PROVIDE DOOR INTERLOCK DISCONNECT
O3
O4
- PROVIDE SAIL SWITCH AT EACH COIL
- PROVIDE 120 VOLT CONTROL CIRCUIT TRANSFORMER
IDENTIFICATION
RHC -1
RHC -2
O - MFG'S 100% 0/A ECONOMIZER MODULE 11 - INDIVIDUAL ELEC. CONNECTIONS FOR EACH
RHC -3
O - 2 'r THROWAWAY PRE FILTERS AND FRAME 12 - EMERGENCY POWER FOR SUPPLY AND
RHC -4
CFM
2415
1135
(VFD) WITH LINE REACTOR AND DISCONNECT
1170
CONTROL TRANSFORMER, AND PILOT LIGHT
745
E.A.T. /L.A.T.
55'/100'
55'/95'
AREA SERVED
55'/100'
55'/100'
DUCT SIZE
20x18
1 4x1 4
1604
TCD 180
12x12
NO. OF STAGES
3
2
2
UNIT ACCESSORIES
2
TOTAL KW
35 KW
14 KW
CFM
17 KW
10 KW
ELEC.
460 -3
460 -3
460 -3
460 -3
UNIT ACCESSORIES
O2 O3 O4
O2 �3 O4
O2 O3 O4
5/460 -3
O2 O3 40
REMARKS
a_
N
STARTER TYPE
OD
DISCONNECT TYPE
OA
ACCESSORIES
RTU -1 AIR HANDLING UNIT CONTROL SEQUENCE
THE AIR HANDLING UNIT (AHU) SUPPLY FAN SHALL BE STARTED AND STOPPED THROUGH A HAND -OFF -AUTO SWITCH. WHEN
THE SWITCH IS IN THE AUTO MODE, THE UNIT SHALL START AND STOP ACCORDING TO AN ADJUSTABLE TIME SCHEDULE BY
THE BUILDING AUTOMATION SYSTEM (BAS) WITH AN INTERFACE PANEL LOCATED IN THE BUILDING. UPON "START" COMMAND,
THE CONTROL SYSTEM SHALL BE ACTIVATED, THE OUTSIDE AIR DAMPER WILL OPEN AND INTERLOCKED EXHAUST FANS SHALL
START. WHEN CONFIRMED OPEN, THE SUPPLY AIR FAN WILL START AND RUN CONTINUOUSLY. DAMPERS THAT FAIL TO OPEN
SHALL BE INDICATED BY ALARM. INTERLOCKED FANS THAT FAIL TO START SHALL BE INDICATED BY ALARM.
DUCT MOUNTED REHEAT COILS SHALL BE TIED IN TO THE ON BOARD CONTROLLER. SPACE TEMPERATURE CONTROL SHALL
BE WITH WALL MOUNTED THERMOSTATS.
A DISCHARGE AIR TEMPERATURE SENSOR SHALL MODULATE THE AHU COMPRESSORS TO MAINTAIN SET -POINT (ADJUSTABLE)
TEMPERATURE. THE DISCHARGE AIR TEMPERATURE SHALL BE RESET FOR ENERGY CONSERVATION BASED ON FEEDBACK FROM
SYSTEM REHEAT COIL THERMOSTATS. HOWEVER, HUMIDITY SENSORS IN THE DISCHARGE AIR SHALL LOAD COMPRESSORS TO
MAINTAIN HUMIDITY CONTROL (ADJUSTABLE). "EVAPORATOR DEFROST" OR EQUIVALENT SHALL ALLOW OPERATION AT LOW
CAPACITY.
FILTER PRESSURE DROP SHALL BE MEASURED AND ALARM THE CONTROL SYSTEM IF THE DROP IS EXCESSIVE (ADJUSTABLE).
WHEN THE UNIT IS OFF, THE FOLLOWING SHALL OCCUR:
A. OUTSIDE AIR DAMPERS SHALL CLOSE.
B. THE SUPPLY FAN SHALL STOP.
C. THE CONTROL SYSTEM SHALL BE DE- ENERGIZED.
D. INTERLOCKED EXHAUST FANS SHALL STOP.
E. ALL OUTPUTS SHALL BE EQUIPPED WITH LOCAL /REMOTE SWITCHES AND ON /OFF PUSHBUTTONS OR GRADUAL SWITCHES
TO FACILITATE TROUBLESHOOTING.
AIR HANDLER CONTROL SEQUENCE
DX ROOF -TOP A/C UNIT SCHEDULE
GENERAL NOTES:
(1) - EXTERNAL STATIC PRESSURE INCLUDES
ALL LOSSES IN DUCT SYSTEM
(2) - HIGH EFFICIENCY MOTOR
UNIT ACCESSORIES:
O1 - MOTORIZED INLET VANES ON SUPPLY & 80 - ROOF CURB WITH
RETURN FANS 90% EFFICIENT FINAL FILTERS
O2 - FACTORY INSTALLED HUMIDIFIER Og - SPRING ISOLATION RAIL
(SEE SCHEDULE)
O3 - MFG'S BLENDER MODULE 10 - UNIT STARTERS, CONTROLS, DAMPERS
AND ACCESSORIES FACTORY INSTALLED BY
O - MFG'S DISCHARGE PLENUM MODULE A/C UNIT MANUFACTURER
O - MFG'S 100% 0/A ECONOMIZER MODULE 11 - INDIVIDUAL ELEC. CONNECTIONS FOR EACH
FAN AND CONDENSING UNIT
O - 2 'r THROWAWAY PRE FILTERS AND FRAME 12 - EMERGENCY POWER FOR SUPPLY AND
RETURN FANS ONLY
U7 - MFG'S FINAL FILTER MODULE
•
-C
STARTER ACCESSORIES:
OA - FACTORY MTD. COMBINATION MAG -X -LINE OC = FACTORY MTD. VARIABLE FREQUENCY DRIVE
(VFD) WITH LINE REACTOR AND DISCONNECT
OB - FACTORY MTD. AUTO. TRANSFORMER OD - HAND -OFF -AUTO. SWITCH, 120 VOLT
CONTROL TRANSFORMER, AND PILOT LIGHT
IDENTIFICATION
RTU -1
AREA SERVED
DIALYSIS CLINIC
MANUFACTURER
TRANE
MODEL NO.
TCD 180
OPER. WEIGHT (LBS)
2500#
UNIT ACCESSORIES
5 6 10
CFM
5465
EXT. SP. (1)
3"
TOTAL SP.
4"
H.P. /ELEC (2)
5/460 -3
a_
N
STARTER TYPE
OD
DISCONNECT TYPE
OA
ACCESSORIES
o
MINIMUM
1050
ja
o
MAXIMUM
5255
DEHUM CFM
5255
o
MAX. FV
500
z
E.A.T. D.B. /W.B.
79.4/66
J
oL.A.T.
D.B. /W.B.
55/54.6
GTH BTU /HR
173,047
NO.
2
Z
N
xw
R.L.A.
14.6/10
CL
Z
2
z
°
L.R.A.
118/63
WCe
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2
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o
F.L.A.
1.6
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REMARKS
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2214 METROCENTER BLVD.
SUITE 128
NASHVILLE, TN 37228
OFFICE 615.256.7038
FAX 615.256.7132
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DRAWN: LKK
PROJECT ARCHITECT: SPP
(PROJECT MANAGER: LKK
IREVIS(ONS: 1
)B# 05098
LE:
DATE: JULY 21, 2006
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�s NO. PE10000164
STATE" :
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HVAC
Schedules
M0.01