SECTION SEQUENCE OF OPERATIONS FOR HVAC CONTROLS

Transcription

1 SECTON SEQUENCE OF OPERATONS FOR HVAC CONTROLS PART 1 - GENERAL 1.1 SUMMARY A. This Section includes control sequences for HVAC systems, subsystems, and other equipment. 1.2 SUBMTTALS A. Submittals are required and shall include detailed descriptions of the proposed sequence of operations for all systems specific to the project. B. The following information shall be submitted as a very minimum to the Engineer: 1. System diagrams denoting the operation of each individual system, folded to an equivalent 8-1/2 inch by 11 inch bound packet. 2. DDC logic diagrams. 3. Written sequences of operation with each specific diagram. 1.3 NOTE TO ALL BDDERS A. f items listed in Part 1.4 General below cannot be met, then all exceptions taken are to be included with the bid. B. f the following Sequences of Operations cannot be met, then all exceptions taken are to be included with the bid. C. See Westlake High School Field House Drawing M101 for additional notes pertaining to the DDC System. 1.4 GENERAL A. The portion of the DDC System work associated with the Field House (auxillary gymnasium) is considered an addition to the Westlake High School and Westlake Middle School DDC System Contract through Automated Logic. Utilize High School Specification nstrumentation and Control for the work described herein. B. All existing sensors, relays, switches, etc. shall be reused. The existing Direct Digital Control Panel(s) shall be demolished and replaced with the appropriate Direct Digital Control Panel(s). C. The DDC system shall utilize the server located in the High School (connected to the Westlake High School System Ethernet, where all software, graphics, alarms, and trends shall reside. The DDC System communication protocol shall be BACnet where indicated on the drawings, and MODBUS where indicated on the drawings. D. DDC System Contractor shall provide temperature differentials and time delays as required to maintain systems stability. 11-ED

2 SEQUENCE OF OPERATONS FOR HVAC CONTROLS E. All Analog nputs, Analog Outputs, Binary nputs and Binary Outputs shall be capable of being manually overridden through the graphic display that shows these types of points, and, the graphic display shall display the point has been manually overridden by either changing the color of the point or having text next to the point that states manually overridden. Each boiler enable-disable Binary Output shall be capable of being manually overridden either through a switch located on the Direct Control Panel or field mounted switches located in the same enclosure as the Direct Digital Control panel, and each switch shall be labeled Boiler #X Manual Override Enable. F. Technology Contractor shall furnish and install all communication cabling between all DDC system controllers and Westlake High School Ethernet. The Controls Contactor shall coordinate with the Division 27 Technology Contractor all required connections to the Westlake High School System Ethernet. G. DDC system shall be capable of providing alarms of any point within the system. The DDC system shall be capable of trending any point within the system, including software control points calculated by the DDC System, example, AHU-2 discharge air temperature control point. The DDC System Contractor shall setup trends for all points within the system. H. Each graphic display that contains an outdoor air airflow rate shall show the following; outdoor air airflow control point, outdoor air airflow, design outdoor air airflow setpoint without CO2 demand control, and design outdoor air setpoint with CO2 demand control.. Run Time Accumulation - A re-settable run time accumulation for each Binary Output Object connected to mechanical loads greater than 1 HP, electrical loads greater than 10 KW, or wherever else specified or requested by Willard school shall be provided. J. DDC System Graphics shall consist as a minimum of : 1. Cover Graphic Display showing entire floor plan, with hot spots over descriptions to move to floor plans, heating hot water plant, or the displays screens described below. 2. The first floor plan shall show the entire first and second floor with hot spots to move to individual floor plans that match the drawing floor plans, and each floor plan shall display the room temperature, and has a hot spot at the room temperature such that the cursor can be brought to this hot spot and then the graphic display of the heating coil is then displayed. 3. Display of the heating hot water plant. 4. Display of Air Handling Unit AHU-1 including Relief Vent 5 and Shower Room Exhaust Fan 1, Reheat Coil RC-1, Reheat Coil RC-2 and Reheat Coil RC Display of Air Handling Unit AHU-2 including Relief Vent 4, and Exhaust Fan EF One Display of Cabinet Unit Heater CUH-B and Unit Heater UH-C. 7. Display of Domestic Hot Water Heater. 8. Display showing all current unacknowledged alarms and past unacknowledged alarms. 9. Provide screens displaying the written out full sequence of operation for each piece of HVAC equipment. Provide a link to the sequence of operation displays on their respective equipment graphics ED1-029

3 SEQUENCE OF OPERATONS FOR HVAC CONTROLS 1.5 HEATNG HOT WATER BOLERS AND ASSOCATED PUMPS A. The heating hot water boiler system consists of two heating hot water boilers B-1 and B-2 (lead/standby), two primary circulating pumps HWP-1 and HWP-2 and two secondary circulating pumps HWP-3 and HWP-4 (lead/standby). B. One heating hot boiler shall be designated as the lead boiler (adj.) and other shall then be the standby boiler. The DDC System automatically start the standby boiler on a lead boiler failure. The DDC System shall rotate the lead boiler and lag boiler on a weekly (adj) basis. C. One secondary heating hot water pump shall be designated, through the DDC System, as the lead pump (adj.) and other shall be the standby pump. The standby pump shall automatically start on a lead pump failure. The DDC system shall rotate the lead pump and standby pump on a weekly (adj.) basis. D. The DDC System shall reset the boiler plant heating hot water supply temperature setpoint, and shall enable-disable the lead boiler as required to maintain this setpoint. When the outdoor temperature is between 65F (adj) and 45F (adj), reset shall be based on heating valve position in that if one modulating heating hot water valve is 100% open, heating hot water supply temperature shall increase up maximum 180F to get that heating water control valve down to 95% open, and, as the critical heating hot water valve closes heating hot water supply temperature shall be decreased to a minimum of 160F. When the outdoor air temperature is below 45F (adj) the heating hot water supply temperature shall be 180F. E. When the outdoor temperature is above 65F (adj) the boiler plant shall be disabled, except when there is a demand for reheat from AHU-2. When the outdoor temperature is between 65F (adj) and 45F (adj), during occupied periods the DDC system shall energize the lead hot water pump to run continuously and enable the lead boiler, and during unoccupied periods the DDC system shall energize the lead hot water pump to run continuously and enable the lead boiler when there is a demand for heat from any heating coil (AHU, Reheat Coil, Cabinet Unit Heater, Etc.) on the DDC system, and the pump and boiler shall be energized/enabled for a minimum 30 minute period. When the outdoor temperature is below 45F (adj.), the DDC system shall energize the lead hot water pump to run continuously and enable the lead boiler, during occupied and unoccupied periods. Anytime a pump or boiler is enabled it shall be allowed to operate for a minimum of 30 minutes. F. When the lead boiler is enabled by the DDC System, the DDC System shall open the combustion air damper and after the DDC System senses this damper has fully opened via the end switch on the damper motor, the DDC System shall energized the primary pump associated with the lead boiler. After the primary pump has operated for 30 seconds, the DDC System shall enable the lead boiler and the lead boiler shall control its firing rate as required to maintain 180F discharge water temperature. The proof of water flow through the boiler by the flow switch mounted in the boiler water discharge pipe. The 3-way valve located on the inlet piping to the boiler shall modulate as required to maintain 140F inlet water temperature. The boiler manual reset high limit discharge stat shall be set to 200F. When the boiler is disabled by the DDC System, the associated primary pump and the operating secondary pump shall remain operating for a period of 5 minutes (adj) to remove heat from the boiler heat exchanger, and the combustion air damper shall remain open for 5 minutes (adj) to allow for boiler post-purge cycle. G. Each heating hot water pump is constant speed and it s status is monitored by the DDC System. H. Each boiler can be operated in manual mode by placing the boiler enable-disable Binary output to Manual Override Enable and placing the Hand-Off-Auto selector switch of the associated primary pump in Hand position. The primary pump must be operated for minimum 30 seconds 11-ED

4 SEQUENCE OF OPERATONS FOR HVAC CONTROLS prior to manually enabling the boiler, and, the boiler is first disabled and the primary pump must operate a minimum of 5 minutes. Only one boiler is to be operated at a time. The system does not require both boilers to ever operate simultaneously.. Each secondary heating hot water pump can be operated in manual mode by placing the Hand-Off-Auto selector switch in Hand position. J. The boiler s individual operating control shall be set to maintain 180F discharge water temperature and shall operate the burner as required to maintain discharge setpoint. A 180F boiler discharge water temperature setpoint is to be maintained during automatic and manual operation of each boiler. K. The boilers individual operating and safety controls shall be in place for proper boiler firing. The DDC system shall monitor boiler and pump failures. Should a boiler or pump failure occur, the DDC system shall provide an alarm and indicate the specific alarm. L. The DDC System shall control the building heating hot water supply temperature and monitor the building heating hot water return temperature. The DDC system shall provide an alarm if the supply temperature falls below 125F (Adj) for more than 2 minutes (adj), and shall provide an alarm if return temperature falls below 90F (Adj) for more than 2 minutes (adj), M. The DDC System shall monitor heating hot water supply pressure through a pressure sensor located between the air separator and pump suction, and shall provide an alarm if the suction pressure falls below 10 psig (adj). N. Boilers Emergency Shutdown Switch A manual mushroom style pushbutton switch mounted under plexiglass cover when pushed shall immediately shutdowns boilers B-1 and B-2 burners. Switch is located in Mechanical Room next to mandoors opening to Boiler Room. Reset shall be manual by pulling pushbutton. This is a hardwired interlock. Switch, wiring, conduit, relays, etc. are all furnished and installed by DDC System Contractor. Switch position is also monitored by the DDC System and when switch is depressed the DDC System shall indicate an alarm. Switch status shall be displayed on the heating hot water plant graphic display. 1.6 DOMESTC HOT WATER SYSTEM A. The DDC system shall monitor the domestic hot water heater through BACnet communication and shall provide an alarm if an alarm condition exists at the domestic hot water heater. B. The DDC system shall start-stop the domestic hot water recirculation pump, and this pump shall operate continuously 24/7. The DDC System shall monitor the status of the pump and provide an alarm when the pump is not operating and has been commended to operate. E Provide all programming and communication conduit and wiring to the BACNet card serving the Domestic Water Heater. Refer to plumbing drawings for location of this BACnet communications card. Graphic display shall include the information obtained from the Domestic Water Heater from the BACnet communication. DDC System Contractor shall provide a list of all points to Westlake High School that can be displayed through the communication link, and then Westlake High School shall determine which points are to be displayed. 1.7 EXSTNG HVAC EQUPMENT Air Handling Unit AHU-1 including Relief Vent 5 and Shower Room Exhaust Fan 1, Reheat Coil RC-1, Reheat Coil RC-2 and Reheat Coil RC-3 Air Handling Unit AHU-2 including Relief Vent ED1-029

5 SEQUENCE OF OPERATONS FOR HVAC CONTROLS Cabinet Unit Heater CUH-B Unit Heater UH-C A. See attached existing DDC System drawings for Sequence of Operations and Control Diagrams for existing equipment. Match existing sequences of control for all items except AHU-2 which is revised below. 1.8 AHU-2 Sequence of Operation A. The existing controls shall be modified as required to meet this Sequence of Operation. B. General Operation 1. The AHU operates as a single zone variable air volume system and consists of; a supply fan with variable frequency drive, relief air section, outdoor air section, return air section, air filters, Direct Expansion (DX) cooling coil and heating hot water coil. Note, supply fan variable frequency drive does not have a bypass contactor, that is, this variable frequency drive only contains an inverter section which will control the speed of the motor. 2. The AHU is scheduled for automatic operation through the DDC system on a time of day basis for occupied and unoccupied modes. 3. Outdoor air damper note. 2-postion dampers are located at the outdoor air louver. Whenever outdoor is not required, such as during; unit off, unoccupied heating, morning warm-up, etc. these dampers are closed. When outdoor is required, these dampers are open. 4. Heating coil operation notes. The heating coil has a run-a round pump that operates whenever the outdoor temperature is below 40F (adj) or the low temperature cutout stat activates. And the heating coil has a temperature sensor on the coil downstream side, its purpose is to prevent the heating coil discharge temperature from falling below 50F (adj.). C. Occupied Mode 1. The supply fan runs continuously, the outdoor air dampers, return air dampers, relief air dampers and supply fan modulate as required to maintain minimum outdoor air control point, The unit is controlled as follows; 2. The DDC system shall determine the discharge air temperature control point. On a call for cooling, the discharge air temperature shall be maintained at 55F (adj) and the supply fan speed shall vary between 100% (adj) speed and 50% (adj) speed. As the call for cooling diminishes, the supply fan shall slow down to 50% (adj) speed with the supply air temperature maintained at 55F (adj). When the room temperature is between the room cooling temperature setpoint and heating temperature setpoint, the supply fan operates at 50% (adj) speed with the supply air temperature maintained at 55F (adj). When the room temperature falls below the heating temperature setpoint, the supply fan shall operate at 50% (adj) speed and the discharge air temperature shall reset between 55F (adj) and 90F (adj) as required to maintain room temperature heating setpoint. f additional heating is required, the supply air temperature shall be maintained at 90F (adj) and the supply fan speed shall slowly increase (5% speed per minute (adj) up to 100% speed), and then the reverse occurs when less heating is required, however, the supply fan can slow down at a rate required not to overheat the space. See dehumidification cycle below for additional information. 11-ED

6 SEQUENCE OF OPERATONS FOR HVAC CONTROLS 3. Room temperature setpoints shall be user adjustable and initially set at 75F (adj) cooling and 70F (adj) heating. 4. DX Cooling Coil control. The cooling coil discharge air sensor provided by the condensing unit manufacturer shall provide the coil discharge air temperature to the condensing unit controller. The DDC system shall monitor cooling coil discharge air temperature through a dedicated temperature sensor. The DDC System shall send an analog signal (type to be coordinated with unit) to the condensing unit, and this analog signal shall be scaled as required to provide cooling coil operation as described herein. The unit is provided with refrigeration controls capable of accepting this analog signal, and, the condensing unit is furnished with all refrigeration circuit controls and safeties. The DDC System enable and disables the condensing unit though a binary output to the condensing unit, and does not enable the condensing unit below 55F outdoor air temperature. The condensing unit is also furnished with an outdoor air thermostat that prevents operation of the condensing unit below 55F (adj) outdoor air temperature. 5. Dehumidification cycle f room relative humidity exceeds 60% (adj) (as sensed by the room sensor) and the outdoor air temperature is above 60F (adj), the system enters dehumidification mode. The AHU cooling coil discharge temperature shall be maintained at 55F (adj.) and the heating coil shall provide reheat to maintain room temperature. f dehumidification is required while the AHU supply fan is operating between 100% (adj) and 50% (adj) speed, the DDC system shall slowly increase supply fan speed (5% speed per minute up to 100% (adj) speed) and reset discharge air temperature between 55F (adj) and 90F (adj) as required to maintain room temperature cooling temperature setpoint. The system stops dehumidification mode when the room relative humidity falls below 55%. 6. Economizer operation When the outdoor air temperature is below 65F (adj.) economizer operation free cooling shall be allowed. The DDC system shall operate the outdoor air, return air dampers, relief air dampers, heating hot water coil control valve and DX cooling coil valve in sequence and without overlap to maintain discharge air temperature. During economizer operation, outdoor air airflow rate shall not fall below minimum outdoor air airflow control point. 7. Minimum outdoor air airflow. Outdoor air airflow is measured and controlled by the DDC system. Minimum outdoor airflow setpoint adjustment is through the DDC System. When the unit enters occupied mode, the outdoor air airflow shall be maintained at 25% of the value shown on drawing M-102. f the room CO2 sensor is reading below 1000 ppm (adj) setpoint, then the outdoor air airflow shall remain at 25% of the value shown on drawing M-102. f the room CO2 sensor is reading above setpoint, then the DDC controller shall modulate the outdoor air airflow up to 100% of the value shown on Drawing M-102. f the room CO2 sensor continues to read above setpoint for 10 minutes, the DDC system shall indicate an alarm. When the outdoor temperature is below 1F, minimum outdoor air control as stated above shall be overridden, the mixed air temperature sensor shall maintain 40F (adj) mixed air temperature. D. Unoccupied Mode 1. When the AHU is off, the supply fan is off, the cooling coil is de-energized, the heating coil control valve modulates to maintain 70F interior temperature as sensed by the mixed air temperature sensor, the unit outdoor air dampers are closed, the return air dampers are open, and the relief air dampers are closed. 2. Unoccupied heating - The DDC system shall monitor the room temperature. When the room temperature falls below 60F (adj.), the AHU shall activate to provide heat to the room. When the AHU is activated, the supply fan shall operate at 100% (adj) speed and the AHU discharge air temperature shall be maintained at 90F (adj.), the unit outdoor air ED1-029

7 SEQUENCE OF OPERATONS FOR HVAC CONTROLS dampers remain closed, the unit return air dampers remain open and the relief air dampers remain closed. The AHU shall stop when the room temperature rises to 65F (adj). 3. Unoccupied cooling - The DDC system shall monitor the room temperature. When the room temperature rises above 85F (adj.), the AHU shall start, the supply fan shall operate at 100% speed and discharge 55F supply air, the unit outdoor air dampers remain closed, the unit return air dampers remain open, the relief air dampers remain closed. When the room temperature falls below 80F, the AHU shall stop. Note; Economizer operation shall be utilized if the outdoor air temperature is less than the economizer changeover setpoint, see Economizer Operation in Occupied Mode above. 4. Morning warm-up - The DDC system shall monitor the room temperature and outdoor air temperature and automatically start the AHU prior to the occupancy schedule start time based on optimal start time to get the room up to occupied setpoint temperature by occupied start time, and during this period of operation the unit outdoor air dampers remain closed, the unit return air dampers remain open, and the relief air dampers remain closed. During morning warm-up, the AHU supply fan shall operate at 100% speed and discharge 90F (adj.) supply air. The AHU shall enter occupied mode at occupied period start time. 5. Morning cool-down - The DDC system shall monitor the room temperature and outdoor air temperature and automatically start the AHU prior to the occupancy schedule start time based on optimal start time to get the room down to occupied setpoint temperature by occupied start time, and during this period of operation the unit outdoor air dampers remain closed, the unit return air dampers remain open, and the relief air dampers remain closed. During morning cool-down, the AHU supply fan shall operate at 100% speed and shall discharge 55F (adj.) supply air. The AHU shall enter occupied mode at occupied period start time. Note; Economizer operation shall be utilized if the outside air temperature is less than the economizer changeover setpoint, see Economizer Operation in Occupied Mode above. 6. Area relative humidity check - When the outdoor air temperature is above 65F (adj), if the room relative humidity rises above 65% (adj) the AHU supply fan shall operate at 100% speed, the cooling coil shall discharge 55F (adj.) air, the unit outdoor air dampers remain closed, the unit return air dampers remain open, the relief air dampers remain closed, and the reheat coil provides reheat as required to maintain unoccupied room temperature setpoint. The AHU stops when the room relative humidity falls below 60%. E. External Safeties 1. Duct smoke detector, supplied by others, installed in the return air duct shall automatically shut-down the AHU when activated. The AHU shall automatically restart after the fire alarm system has been reset. 2. The low temperature cutout stat shall activate if a temperature of less than 38F is sensed at any one foot of the sensing element. When the low temperature cutout stat actives, the AHU immediately shuts down, the heating coil control valve fully opens, and the DDC system provides an alarm that the low temperature cutout stat has activated. The low temperature cutout stat requires a manual reset. 3. Supply fan status shall be monitored through a differential pressure switch across the supply air fan. f supply fan state changes to off when it should be operating, the DDC system shall generate an alarm. The differential pressure switch shall be set to detect a fan belt breakage indicating the supply fan has lost airflow. 11-ED

8 SEQUENCE OF OPERATONS FOR HVAC CONTROLS 4. The DDC system shall monitor the AHU discharge temperature. f the supply air temperature falls below 50F (adj.) the DDC system shall generate an alarm, and if the supply air temperature falls below 45F (adj.) the DDC system shall stop the AHU, generate an alarm and not allow the AHU to restart until the alarm is acknowledged and the unit is manually restarted. f during occupied mode, the supply air temperature rises above 100F (adj.) the DDC system shall generate an alarm, and if during any mode of operation the supply air temperature rises above 110F (adj.) for 5 minutes the DDC system shall stop the AHU, generate an alarm and not allow the AHU to restart until the alarm is acknowledged and the unit is manually restarted. F. Other 1. DDC system shall directly monitor and display; return air temperature. 2. DDC System shall monitor and display supply fan VFD speed feedback. 3. DDC System shall monitor the air filter pressure differential switch and provide an alarm when activated. The switch shall be set to activate when air filters require replacement. 4. DDC system shall directly monitor and display outside air temperature, relative humidity and CO2 globally from the existing global sensors located at the High School. 5. DDC System shall monitor condensing unit refrigerant circuit failure alarm contacts and provide an alarm if a refrigerant circuit fails. 6. All safeties shall be wired such that the unit will not start in auto, manual or hand. 1.9 EXHAUST FAN EF-1, CONTROLLED BY DDC SYSTEM A. DDC system shall energize and de-energize Exhaust fan based on an occupied/unoccupied schedule and as noted herein. DDC system shall monitor status of exhaust fan. B. Exhaust air is exhausted to outdoors, and when exhaust is off gravity backdraft damper closes DSPLAY OF SHOWNG CURRENT UNACKNOWLEDGED ALARMS AND PAST UNACKNWOLEDGED ALARMS A. The DDC system shall have a graphic display that shows all current unacknowledged alarms in order received and all past unacknowledged alarms in order received. 1 PRODUCTS (Not Applicable) 2 EXECUTON (Not Applicable) END OF SPECFCATON ED1-029

9 SEQUENCE OF OPERATONS FOR HVAC CONTROLS APPENDX EXSTNG EQUPMENT CONTROL DAGRAMS AND SEQUENCES OF OPERATON 11-ED

10 GRAVTY REUEF VENT -5 ~~!i=' = ===l ~= = = ===== = =... =<= = = = --= = = === = = = ==== = = =.. = ===.. = = = ==~ DM-2.., RETURN AR UH-C /~ DM-1 OUTDOOR AR :::: N.C. ::::N.C. " /,_ R---" "- EXHAUST FAN-1 DM-4 EXHAUST AR ~~ - '. -~-... ~. ;...-. fpb1 s OVERRDE PUSH BUTON L!J 1 STORAGE ROOM A-7 SUPPLY AR TO TEAM ROOM A-1 SUPPLY AR SHOWER ROOM A-2 SUPPLY AR TO LOCKER ROOM A-4 EXHAUST AR FROM SHOWER ROOM A-2 ~ ~ t~--- SPACE TEMPERATURE SENSORS SEQUENCE OF OPERATON NR HANDLNG UNT THE AR HANDUNG UNT FAN S STARTED AND STOPPED BASED ON A TME OF DAY SCHEDULE. THE FAN S STARTED BASED UPON AN OPTMAL START PROGRAM THAT PERMTS THE SPACE TEMPERATURE TO REACH SETPONT BY THE OCCUPED TME. WHEN THE FAN STARTS, THE OUTDOOR AR DAMPER REMANS CLOSED AND THE HOT WATER VALVES REM.'JN OPEN TO THE REHEAT COLS UNTL THE SPACE TEMPERATURE REACHES SETPONT AND THEN THE DAMPER OPENS TO MNMUM POSTON AND THE HOT WATER VALVES COME UNDER CONTROL THE FAN RUNS CONTNUOUSLY DURNG THE OCCUPED MODE. 2. THE DOC SYSTEM MANTANS MNMUM OUTDOOR AR BY CALCUlATNG THE REQURED MXED AR SETPONT TEMPERATURE BASED ON OUTDOOR AR TEMPERATURE, RETURN AR TEMPERATURE AND UNT C.F.M. CAPACTY. THE DOC CONTROLS MODUlATE THE MXNG DAMPERS TO MANTAN THE MXED AR SETPONT. SHOULD ANY SPACE REQURE MORE COOUNG THAN S SATSFED BY THE MXED AR TEMPERATURE. THEN THE WARMEST SPACE RESETS THE MXED AR TEMPERATURE TO PERMT MORE OUTDOOR AR TO BE BROUGHT N. F OUTDOOR AR TEMPERATURE EXCEEDS SPACE TEMPERATURE, THEN THE OUTDOOR AR RETURNS TO MNMUM OUTDOOR AR REQUREMENTS. 3. A SPACE TEMPERATURE SENSOR MODUlATES A NORMALLY OPEN TWO-WAY REHEAT COL CONTROL VALVE TO WJNTAJN SPACE TEMPERATURE SEfPO!NT. /:. SPACE TEMPERATURE RSES TO SETPONT, THE VALVE MODUlATES CLOSED TO THE COL. AS SPACE TEMPERATURE RSES PAST SETPONT, THE MXNG DAMPERS MODUlATE OPEN. 4. DURNG THE UNOCCUPED MODE, THE OUTDOOR DAMPERS REMAN CLOSED AND THE FAN REMANS OFF. THE FAN CYCLES ON AND THE VALVE S POSmONED TO PROVDE FULL HEAT ON DROP BELOW THE UNOCCUPED TEMPERATURE SETPONT. THE AHU RECRCULATES 100% RETURN AR. WHEN THE SPACE TEMPERATURE RSES ABOVE THE UNOCCUPED TEMPERATURE SETPONT, THE FAN S SHUT OFF. F THE OUTDOOR AR TEMPERATURE S ABOVE 40 OEG. F. THE REHEAT VALVES POSTON TO FULLY CLOSED TO THE COL WHEN T-lE FAN S OFF. F THE OUTDOOR AR TEMPERATURE S BELOW 40 DEG. F. THE VALVES POSTON TO 50% FLOW lhrough THE COL 5. A LOW TEMPERATURE THERMOSTAT AT EACH REHEAT COL STOPS THE FAN, CLOSE THE OUTDOOR AR DAMPERS AND OPEN THE HEATNG VALVE ANY TME THE SUPPLY AR TEMPERATURE DROPS BELOW 37 DEG. F. THE THERMOSTAT ALSO SENDS AN NPUT TO THE DOC CONTROLLER WHCH N rurn GENERATES AN- AlARM. 6. SHOULD AT ANY TME THE FAN FAL TO RUN WHEN CALLED FOR, THE DOC CONTROLLER GENERATES AN ALARM. 7. SHOULD AT ANY TME THE SPACE TEMPERATURE FALL 10 DEG. F. BELOW SETPO!NT FOR MORE THAN 15 MNUTES, THE DOC CONTROLLER GENERATES AN ALARM. 8. A DFFERENTAL AR PRESSURE SWTCH S MOUNTED ACROSS THE FLTER BANK. SHOULD AT ANY TME THE FLTER PRESSURE DROP EXCEED THE MANUFACTURES RECOMMENDED LOADED FLTER PRESSURE DROP, THE DOC CONTROLLER GENERATES AN ALARM. AR HANDLNG UNT-1 SCHEMATC & SEQUENCE OF OPERATON SLAWSON EQUPMENT COMPANY, BARBER CO.Jr.W. E'MRONMENTAL CONTR()l SYSTEl.l CLEVELAND AKROH - 21& NC. 9, A PUSH BUTON MOUNTED N STORAGE ROOM A-7 PROVDES A 2-HOUR TMED OVERRDE Of THE NGHT SETBA.CK TO THE OCCUPED MODE SEfPONTS WHEN ACTVATED. 4 CUH-B START/STOP. 5 UH-C START/STOP ESP

11 AHU-1 RETURN AR TEMPERATURE SENSOR S-1 TS-8201 ~J~ 1 : 1 't. _-}-- MZ-11 AHU-1 SUPPLY AR TEMPERATURE SENSOR S-2 TS ~-N2-}- - MZ c-- TEAM ROOM A-1 LOCKER ROOM A-4 SHOWER ROOM A-2 REHEAT COL-! REHEAT COL-2 REHEAT COL-3 LOW TEMPERATURE LOW TEMPERATURE LOW TEMPERATURE THERMOSTAT THERMOSTAT THERMOSTAT T-1 TC-4111 W/AT-208 T-2 TC-4111 W/AT-208 T-3 TC-4111 W/AT-208 r~----l ~--R ----l ~--R --~-N3-}~ 8 1 -c-- SET 37 F SET 37 F SET F \! L J 37! AHU-1 SUPPLY FAN DFFERENTAL PRESSURE SWffCH DPS-1 PC-301 W/TOTAL PRESSURE TPS [ c_::~~-- ~~N4-} 1 -c - MZ- 1 AHU-1 UNOCCUPED CYCLE OVERRDE PUSH BUTTON PB-1 CYlP-346 1/3 H.P F.LA. SHOWER ROOM EXHAUST FAN-1 CURRENT SWTCH CS-1 H-800 (HAWKEYE) MZ-11 SEE BUS DETAL MCROZONE J CONTROLLER MZ-11 MZ2-1E ASD + S-1 -r-- -@N 1 c Ul: 1 RA-TEMP (BALCO) 00:1 SFAN-5/S NCl@ DGTAL OUTPUT Ci N!ll 00:2 OA-DMPR C DGTAL OUTPUT C 2 N02 R oo,3 EFt-s;s DGTAL OUTPUT CJ.JN03 S-2 -(-- N 2 U!:2 SA-TEMP D L T-1,2&3 -c DPS-1 -{ DPS-2 -{ PB-1 -c CS-1 DM-1 DM-2 --c-- - c NG AO! AO 2 (6ALCO) Ul:3 TEMP-QK (DR.DlGTAL} U!:-4 SfAN-OPR (D!R.DG!TAL) UJ:5 FLTER (DlR.DGTAL) Ul:6 OVERRDE {DR.OGTAL) U1:7 EFt-OPER (DR.DGTAL) A0:1 MA-OMPR A0:2 REL-DMPR LOCATE ADJACENT TO AHU-1 L. jl~:! R L. _jl~~l E ~~~:: L. 1 ~~7~ _j_ ND7@! NCB@ ca L _jnoa@l r J. _ '~-!~ 3-AMP - ' -J-;_~~;1-~ -~-+---r~ t t' -rr~~~r~...l--24h} _... AHU-1 R-1 DM-3 EF-1 R-2 -- PB-11 LNE FAN START RELAY R-1 P l NOTE: LOCATE NTERLOCK RELAY NSDE OF ELECffiiCAL CONTROLS COMPARffMENT OF AR HANDLNG UNff. MZ-11 OUTDOOR AR NTAKE POSffNE CLOSURE DAMPER MOTOR DM-3 MA c~,~~~j SHOWER ROOM EXHAUST FAN-1 AR HANDLNG UNT-1 ENGNEERED AR MODEL No. LM FAN MOTOR NEUTRAL [~~,~~}- "'" LOCATE N STORAGE ROOM A-7 AHU-1 OUDOOR & RETURN AR DAMPER MOTOR DM-1 MS-7433 MZ c 24H DM-1 DM-2 ---[24H 24H 1 _,...-[..J UNE NEUTRAL GROUND EXHAUST AR DAMPER MOTOR DM-4 MA-7201 COM 1---~--- }-.- y~ :~:n:;g;l~ yz 4-: \ LsHLD-1 DAMPER U 5 --D 500 OHMS PB-1 t MZ-11 PB-11 MZ-11 VA) 291 N.C. 2 V.O.C.=OUTDOOR DAMPER CLOSED/RETURN OPEN 10 V.D.C.~OUTDOOR DAMPER OPEN/RETURN CLOSED 2 V.D.C.=DAMPER CLOSED 1 0 V.D.C.~OAMPER OPEN MZ-11 AR HANDLNG UNT -1 SHm CONTROL WRNG jl_of ~ SLAWSON EQUPMENT COMPANY, NC. BARBER COUAN EMRONMENTAL CONTROL SYSTEM CLEVaANO- 216-J91-726J AKRON ~::::]1

12 MCROZONE CONTROLLER MZ-12 MZ2-1 E TEAM ROOM A-1 SPACE TEMPERATURE SENSOR S-3 TE-205-P-5 (MAMAC) ~J~ 1 : 1 _~}- MZ-12 t (famper PROOF) SHOWER ROOM A-2 SPACE TEMPERATURE SENSOR 5 fei~rr ~:~~}(~c~z-12 (TAMPER PROOF) t LOCKER ROOM A-~ SPACE TEMPERATURE SENSOR S-5 TE-205-P-5 (MAMAC) J!JJ~ 1:5_}- Ml-12 (TAMPER PROOF) t ENTRANCE VESTBULE CABNET UNT HEATER "B'' SPACE TEMPERATURE SENSOR S-9 TS W/GUARD ZONE SPACE 0- COM 0- SETPT 0 ~ - -c - N7 -},;. MZ-12 TEAM ROOM REHEAT COL -1 LEAVNG AR TEMPERATURE SENSOR S-6 TS ~-N2-} -e- MZ c-- SHOWER ROOM REHEAT COL-3 LEAVNG AlR TEMPERATURE SENSOR S-7 TS ~-N~-}...,_ MZ c-- LOCKER ROOM REHEAT COL -2 LEAVNG AR TEMPERATURE SENSOR s-a TS ~-N6-}... MZ c -- UPPER LEVEL MECHANCAL ROOM CABNET UNT HEATER ~ SPACE TEMPERATURE SENSOR S-10 TS ZONE SPACE 0- CDM 0- SEiPT 0 A-N8-}-- 'tc -- MZ-12 SEE t:::o::, ~ ASD -, BUS DETAL + s-3 -c== S-6 S-4 S-7 S-8 S-9 S-10 V-1 ~~~' --c= ~N2 --@c --c- ~~ 3 -H--<~1'l -{ N 4 := ~fl :~: -{ ~1~5 c 00:1 CUHB-S/S NC@ Cl ca. -, OR.D!GTAL NO"!~ Ll 00:2 UHC-5/S NC 2 v! C DR.DGTAL N"D""'" ~ = -----}--!?.>. 1 r- A' , """' 1 ' 1~~:;J---- tl1:1 Al-TEMP 11 r NC3@ T (EW.CO) R C3!! Ul:2 A1-RHEAT!niL.,N03@ (BAlCO) WLc~-TEMP ~~ ~! ~~ Ul:-4- A2-RHEAT 1' ' N0 1 1 (BA.CO) 1"'1~, ,~ N~"'-' R c;"@!! L ' N05@ Ut5 A4-TEMP E (BALCO) _._j"""-/ttt-1--@n 6 U1:6 M-RHEAT ~~~ ~!! - L-\ltt-J-{;;,1ij C (BA..CO)...J_ N06@ ---r:== ---r:===,--- f- c f- c -@N 7 ~N 8 ~AD l ~==- ~AO 2 ---L -v 1r- <""i8 c -l"!tt-t'<_;;;:i8ao 3 4 '@c ::!?.: Ul!7 VEST-TMP (BAJ.CO) U:B MECH-TMP (!W.CO) A0:1 A1-VALV A0:2 A4-WJ...V A0:3 A2-VM.V t-. 1:~'~!! l ' N07@ f Nca@! J CS@ l ' ' Noa@ [ i LOCATE ADJACENT TO AHU-1 r J. L~- 24H} L~-!~ _., GND@ "1- CUH-8 R-3 UH-C R-4 P8-2 LNE LNE ENTRANCE VESTBULE CABNET UNT HEATER "8" BY E.C. HOT WATER RETURN LNE STRAP-ON THERMOSTAT T-1 TC-2974 FAN START RELAY R-3 CVR-11C-0 UPPER LEVEL MECHANCAL ROOM UNT HEATER ~ BY E.C. FAN START RELAY R-4 CVR-11 C-O HOT WATER RETURN LNE STRAP-ON THERMOSTAT T-2 TC-2974 R NElJTRAL NEUTRAL RJ=12l SP+ 0 ~ SP+0 TEAM ROOM REHEJ\T COL OHM LOCKER ROOM REHEAT COL OHM SHOWER ROOM REHEAT COL OHM HOT WATER VALVE FLTER J. RESSTOR HOT WATER VALVE J. RESSTOR V-3 VS FLTER ~1V-~l7~ ~~L -~---=~t.a0 1a--- BLU-- ~- C MZ-12 1/'l' RED - SHL A B N.O. 6 V.D.C.~OPEN 9 V.D.C.~CLOSED ~~;B~:u-::::::::::::~!ii J-- PB-12 HOT WATER VALVE J. V-2 VS _-4-4 FlLTER RESSTOR W/AV-601 ~~b ::::::-1-~--fTAgz_l_ MZ- 12 1/2" RED -d -rshloj - ~tvb!:u-::::::::::::~!~ J-- PB-12 A N.D. 6 V.D.C.=OPEN 9 V.D.C.=CLOSED- W/AV-601 ~"YEL -=;t----=~t.a033-- BLU-- ~- C MZ-12 1/'l' RED- SHL ~~/sl:u-:::::::::=~!ii J-- Ps-12 A B N.D. 6 V.D.C.=OPEN 9 V.D.C.=CLOSED MZ-12 V-1 V-2 V-3 ---{ 24H ----{ 24H ---{24H ---{ 24H LNE NEUTRAL GROUND VA) SEQUENCE OF OPERATON ENTRANCE VESTBULE CABNET UNT HEATER-S UPPER LEVEL MECHANCAL ROOM UNT HEATER-C 1. SPACE TEMPERATURE SENSOR ACTNG THROUGH MCROZONE CONTROLLER CYCLES UNT HEATER FAN ON AS REQURED TO MAJNTAlN SPACE TEMPERATURE. 2. A REDUCED TEMPERATURE S MANTANED DURNG UNOCCUPED PERODS. 3. WHEN HEATNG HOT WATER S NOT AVALABLE THE UNT HEATER FAN MOTOR S NOT PERMmED TO OPERATE. MZ-12 SLAWSON EQUPMENT COMPANY, NC. BARBER COli.Wl EMRONOENTAL CO'TROL SYSTEM CLEVELAND ~ AKRON

13 ff' =' GRAVTY RELEF VENT -4 ~~ = ===l f::z - = = DM-2.. = ===,= = ====- =., = == = = == = = = ~ RETURN AJR Notes: See Sequence of Operation Specification for new AHU-2 sequence of operation OUTDOOR AR ~.....~... \.... ~.;., ~.. -,. SUPPLY AR TO GYM ~ LJ fpsl WJ.... '"'.. New DX Cooling Coil fpsl e OVERRDE PUSH BUTTON L1J 1 STORAGE ROOM A-7 A-5 SPACE~ TEMPERATURE SENSOR ' SEQUENCE OF OPERATON AR HANDLNG UNT THE AR HANDUNG FAN S STARTED AND STOPPED BASED ON A TME OF DAY SCHEDULE. THE FAN S STARTED BASED UPON AN OPTMAL START PROGRAM THAT PERMTS 11-lE SPACE TEMPERATURE TO REACH SET PONT BY THE OCCUPED TME. WHEN THE FAN STARTS, THE OU1DOOR AJR DAMPERS REMAN CLOSED AND THE HOT WATER VALVE REMAJNS OPEN UNTL THE SPACE TEMPERATURE REACHES SET PONT AND THEN THE DAMPERS OPEN TO MNMUM POSTON AND THE THREE WAY HOT WATER VALVE COMES UNDER CONTROL THE FAN RUNS CONnNUOUSLY DURNG THE OCCUPED MODE. 2. THE DOC SYSTEM MANTANS MNMUM OUTDOOR AR BY CALCULATNG THE REQURED MXED AJR SET PONT TEMPERATURE BASED ON OUTDOOR AJR TEMPERATURE, RETURN AR TEMPERATURE AND UNT CFM CAJPACF!Y. THE DOC CONTROLS MODULATE THE MXNG DAMPERS TO MAJNTAN THE MXED AJR SET PONT. SHOULD THE SPACE REQURE MORE COOLNG THAN S SATSFED BY THE MXED AR TEMPERATURE, 11-!EN THE SPACE RESETS THE MXED AR TEMPERATURE TO PERMT MORE OUTDOOR AR TO BE BROUGHT N. F OUTDOOR AR TEMPERATURE EXCEEDS SPACE TEMPERATURE, THEN THE OUTDOOR AJR RETURNS TO MNMUM OUTDOOR AJR REQUREMENTS. 3. A SPACE TEMPERATURE SENSOR MODULATES THE THREE-WAY HEATNG COL CONTROL VAJLVE TO MANTAJN SPACE TEMPERATURE SET PONT. AS SPACE TEMPERATURE RSES TO SET PONT, THE VALVE MODULATES CLOSED TO THE COL. SUPPLY AR TEMPERATURE S MANTANED AT 60 DEG. F. MNMUM DURNG THE HEATNG MODE. PS SPACE TEMPERATURE RSES PAST SET PONT, THE MXNG DAMPERS MODUlATE OPEN. 4-. DURNG THE UNOCCUPED MODE, THE OUTDOOR DAMPERS REMAN CLOSED AND THE FAN REMANS OFF. THE FAN CYCLES ON AND THE VALVE S POSillONED TO PROVDE FULL HEAT ON A DROP BELOW THE UNOCCUPED TEMPERATURE SET PONT. THE AHU RECRCULATES 100% RETURN AR. WHEN THE SPACE TEMPERATURE RSES ABOVE THE UNOCCUPED TEMPERATURE SET PONT, THE FAN SHUTS OFF. F THE OUTDOOR AJR TEMPERATURE S ABOVE 40 DEC. F. THE HEATNG COL VALVE POSTONS TO FULLY CLOSED TO THE COL WHEN THE FAN S OFF. F THE OUTDOOR AJR TEMPERATURE S BELOW 40 DEG. D. THE VALVE POSTONS TO 50% FLOW THROUGH THE COL 5. A LOW TEMPERATURE THERMOSTAT AT THE HEATNG COL STOPS THE FAN, CLOSES THE OUTDOOR AJR DAMPERS AND OPENS THE HEATNG VALVE ANY TME THE SUPPLY AR TEMPERATURE DROPS BELOW 37 DEG. F. THE THERMOSTAT ALSO SENDS AN NPUT TO THE DOC CONTROLLER WHCH N TURN GENERATES AN ALARM. 6. SHOULD AT ANY TME THE FAN FAL TO RUN WHEN CALLED FOR, THE DOC CONTROLLER GENERATES AN AlARM. 7. SHOULD AT ANY TME THE SPACE TEMPERATURE FALL 10 DEC. F. BELOW SET PONT FOR MORE THAN 15 MNUTES, THE DOC CONTROLLER GENERATES AN ALARM. 8. A DFFERENTAL AR PRESSURE SWTCH S PROVDED MOUNTED ACROSS THE FLTER BANK. SHOULD AT ANY TME THE FLTER PRESSURE DROP EXCEED THE MANUFACTURES RECOMMENDED LOADED FLTER PRESSURE DROP, THE DOC SYSTEM GENERATES AN ALARM. 9. A PUSH BUTTON LOCATED JN STORAGE ROOM A-7 PROVDES A 2-HOUR TMED OVERRDE OF THE NGHT SETBACK TO THE OCCUPED MODE SET PONTS WHEN ACTVATED. 10. POSTVE CLOSURE DAMPERS ARE PROVDED AT THE OUTDOOR AR NTAKE. DAMPERS OPEN DURNG THE OCCUPED MODE AND ARE CLOSED DURNG THE UNOCCUPED AND WARM-UP MODES. 11. A GRAVTY RELEF DAMPER S PROVDED N THE NECK OF THE GRAVTY RELEF VENT. DAMPER MODULATES N UNSON WTH THE AHU MXNG DAMPERS. 12. THE FOLLOWNG CONTROL PONTS ARE PROVDED ON THE DDC SYSTEM' A. ANALOG NPUTS 1. RETURN AJR TEMPERATURE. 2. MXED AJR TEMPERATURE. 3. AHU SUPPLY AR TEMPERATURE. 4. SPACE TEMPERATURE B. DGTAJL NPUTS 1. AHU FAN STATUS. 2. AHU FLTER STATUS. 3. PUSH BUTTON OVERRDE. 4-. LOW LMT TRP. C. ANALOG OUTPUTS 1. HEATNG COL VAJLVE. 2.AHU MXNG DAMPERS. 3. GRAVTY REUEF DAMPER. D. DG!TAJL OUTPUT 1. AHU FAN START/STOP. 2. POSTVE CLOSURE DAMPERS. OF OPERATON """ 1.Q_ " 1!1_ NC ESP

14 GYM A-5 SPACE TEMPERATURE SENSOR fei=rrs~:~_~}(m:c~z-21 t (TAMPER PROOF) AHU-2 MXED AR TEMPERATURE SENSOR S-3 TS [}JJ : t AHU-2 HEATNG COL LOW TEMPERATURE THERMOSTAT _-}-- MZ-21 l~fh_'~j- MZ-21 -~ AHU-2 SUPPLY FAN DFFERENTAL PRESSURE SWTCH DPS-1 PC-301 W/TOTAL PRESSURE TPS r~~n6- ~~ }- MZ-21 L s~c~ AHU-2 RETURN AR TEMPERATURE SENSOR S-2 TS-8201 [gj~j 1 : 2 _-}- MZ-21 t AHU-2 SUPPLY AR TEMPERATURE SENSOR S-4 TS-8405 ~J~~:~-}- MZ-21 t AHU-2 FLTER DFFERENTAL PRESSURE SWTCH DPS-2 PC-301 W/(2) RS-A520-1-A-1 ~~N7-} [_: ~~-~-- C -- - MZ-21 SEE BUS DETAL S-1 S-2 S-3 S-4 T-1 DPS-1 DPS-2 PB-1 DM-1A & 18 DM-2 V-1 --c--- -{-- -c --[ MCROZONE CONTROUER MZ-21 MZ2-1E Ul:1 A5-lEMP (BALCO) U!:2 RA-TMP (EALCO) Ul:3 MA-TEMP {SAL CO) Af H--J.-@ N 4 Ul:4 SA-TEMP C (BALCO) ~=t4<2> Af.f-j...J.-e> N 5 U!:5 TEMP-OK -[ -c --c-- -r--- -c--- -c-- -c:: C N 7 c A!J 1 AO 2 c (D!R.OGrTAL) Ul:6 SFAN-OPR (OR.D!GfTAL} Ul:7 FlLTER (O!R.DGTAL) Ul:8 OVERRDE (DR.O!GTAL) A0:1 Mb.-DMPR A0:2 REL-DMPR A0:3 HTG-VALV LOCATE ADJACENT TO AHU-2 00:1 SFAN-S/S NC@ DGTAL OUTPUT Cl -, L jnm 00:2 OA-DMPR C DGTAL OJTPUT C }--- AHU-2 1 r R-1 -ri-2~}-~ ~M;~A /.-'-- 24H} J _..,... PB MZ-21 FAN START RElAY R-1 P L NOTE: LOCATE NTERLOCK RELAY NSDE OF ELECTRCAL CONTROLS COMPARTMENT OF AR HANDLNG UNT. MZ-21 AR HANDUNG UNT-2 ENGNEERED AR MODEL No. LM-1 0-C OUTDOOR AR NTAKE POSTVE CLOSURE 9 DAMPER MOTORS DM-3A MA-75D3 N ' _.A_, -or {._j ~:: j. / / qdm-38 MA-7503 J L-2 1-, : - N.C. j L J AHU-2 UNOCCUPED CYClE OVERRDE PUSH BUTTON ;r ~~;~~}-., DM-2 ---( 24H LOCATE N STORAGE ROOM A-7 V-1 ---( 24H 24 V.A.C. POWER 80X(96 VA) PB-21 T -PB202 AHU-2 OUTDOOR AR DAMPER MOTOR DM-1A MS-7433 COM ~ ----t---j :+---T---24H 1 rfl!k+-~--c- Y f-t+-\ - A01l-- Y2 4--eo \ J U DAMPER s--eo OHMS 2 V.D.C.=DAMPER CLOSED l l 10 V.D.C.~DAJMPER OPEN 1 AHU-2 RETURN AJR DAMPER MOTOR DM-18 MS-7433 COM 1.r : J! J 4--e s--e GRAVTY RELEF VENT -4 DAMPER MOTOR DM-2 MS-7433 PB-21 COM 1----t--- J-- + z----r---24-h MZ-21 Y1 3~\::1J::~g~l- Y2 4-~ ~J DAMPER U S--D 500 OHMS 2 V.D.C.~DAJMPER CLOSED 10 V.D.C.~DAJMPER OPEN PB-21 MZ-21 1" HOT WATER COL 3-WAY MXNG VALVE 560 OHM V-1 VS J.RESSTOR W/AV-601 FLTER YEL -~---=.. t.ao:a-- BLU -- -~- C MZ-21 RED- SH ~~/al:u:::::::::::::::::::~!~j-- PB-21 V.D.C. ~ OPEN 9 V.O.C. BYPASS MZ-21 SLAWSON EQUPMENT COMPANY, BARBER COL.MAN ENV!RON!JENTA!.. CONTROl SYSTE.i ClEVE..ANO J "-'<RON J _ NC. 2 V.D.C.~DAMPER OPEN 10 V.D.C.~DAMPER CLOSED