洲際新標準101-200

1、ENGINEERING STANDARDS SECTION 2 - HEATING, VENTILATION AND AIR CONDITIONING Wires and cables shall be as follows: Single Conductor (primary voltage/a.c.): 1.5 mm2 (or equivalent) stranded copper with 600 volt insulation colour coded in accordance with local wiring regulations, for use in conduit. La

2、rger size cables shall be provided where necessary to limit the voltage drop to 2.5%. 1.5 mm2 shall be used for instrument heat tracing feeders. Signal Cables (4-20 mA Analog): For Use in Areas Other than Air Plenums:2/C 1.0 mm2 (or equivalent) shielded and multi-pair 0.75mm2 (or equivalent) individ

3、ually shielded.For Use in Air Plenums: Plenum type Teflon insulated, 2/C 1.0 mm2 shielded and multi-pair 1.0 mm2 individually shielded. NOTE: The cables listed above have conductors with 300-volt insulation ratings. Similar cables with 600-volt insulation ratings must be provided for any cable termi

4、nating within or occupying an enclosure containing conductors operating at a voltage greater than 230 volts (ie, 400 volt motor starter enclosure) Alarm, Digital Input/Output and Control Cables (24-volt ac): For Use in Areas Other Than Air Plenums: 2/C 1.0 mm2, and multi-pair 0.75 mm2. For Use in Ai

5、r Plenums: Plenum type Teflon insulated, 2/C 1.0 mm2 and multi-pair 0.75 mm2. Larger gauge cables shall be provided where necessary to limit the voltage drop to 1.2volts. NOTE: The cables listed above have conductors with 300 volt insulation ratings. Similar cables with 600 volt insulation ratings m

6、ust be provided for any cable terminating within or occupying an enclosure containing conductors operating at a voltage greater than 250 volts (i.e., 400 volt motor starter enclosure). RTD Wiring: For Use in Areas Other than Air Plenums: 3/C 1.0 mm2. For Use in Air Plenums: Plenum type Teflon insula

7、ted 3/C 1.0 mm2.InterContinental Hotels Group - Asia Pacific2009-REV-01 All Rights Reserved82 ENGINEERING STANDARDS SECTION 2 - HEATING, VENTILATION AND AIR CONDITIONING DDC Communications Cables: DDC communications wiring between the local control units and the network computer shall be 1.0 mm2 shi

8、elded cable, and shall be run in trays where available, otherwise in approved raceways. Tags for wires and cables shall be clip-sleeve type nonmetallic wire markers or equivalent. For conduit fittings, conduit hangers and supports, terminal junction boxes, expansion joints, sleeves and wiring device

9、s, comply with local wiring regulations. Electrical Wiring Installation All wiring in Mechanical Equipment Rooms, communications or electrical closets shall be in approved raceways (cable tray, conduit, etc). Open wiring strung above ceilings shall be plenum rated cable, bundled together and protect

10、ed from mechanical damage. Wiring shall be independently supported from the building structure with bridal rings and clips. The supporting of wiring from mechanical ductwork or piping is not acceptable. Cables for primary voltage a.c. wiring and low level signal wiring (ie, 4-20 mA analog) shall alw

11、ays be run in separate raceways. Use liquid tight flexible metal conduit, 20mm minimum size, for making connections at instruments and devices mounted on piping or vessels or on equipment subject to vibration. Low level signal wiring home runs to local control stations may be by means of multi-pair

12、cables. The number of pairs in such cables shall be uniform throughout the installation, and in general, there shall be at least 20% spare pairs in each such cable. Primary voltage a.c. circuits used for control and instrumentation shall be taken from panelboards connected to the emergency power dis

13、tribution system, with the exception of circuits powered from motor starters. Panelboard and circuit breakers shall be provided under the Electrical Section, but the wiring and raceway materials and installation for ATC system power requirements shall be furnished under this Section. Primary voltage

14、 a.c. circuits used for control and instrumentation shall be dedicated to the ATC system and shall not be used for any other purposes. Conduits shall be run exposed in mechanical spaces, concealed in occupied space, and parallel or perpendicular to structural members or architectural features. Bends

15、 in conduit shall not have a radius less than six (6) times the diameter of the conduit, nor bendInterContinental Hotels Group - Asia Pacific2009-REV-01 All Rights Reserved83 ENGINEERING STANDARDS SECTION 2 - HEATING, VENTILATION AND AIR CONDITIONING Provide junction boxes or pull boxes as required

16、and necessary to avoid excessively long runs or too many bends between outlets. Fittings in conduit containing multi-conductor cables shall be oversized to accommodate 3 times cable bending radius for 90 degree bends and 4 times bending radius for straight runs. Conduits shall be offset where they e

17、nter surface mounted equipment. Wiring installed in panels and other enclosures shall be neatly looped and laced. Conduit runs, which extend from the interior to the exterior of a building, shall be sealed to prevent the circulation of air. This shall be accomplished by the installation of sealing f

18、ittings. All signal wires shall be tagged with their wire designations and all signal cable pairs shall be tagged with their service designations where terminated at devices and in terminal boxes. Wires shall be terminated with insulated spade type lugs on screw terminals. Soldered connections shall

19、 only be made at instruments where no other means of termination is practical. Perform continuity testing for all wiring installed. Control raceways shall not be hung from electrical raceways or attached to ceiling grid hanger wires. No 300 volt insulated wiring shall terminate within or occupy any

20、enclosure containing conductors operating at a voltage greater than 300 volts. This particularly applies to any analogue or digital I/O wiring entering 230-volt motor starter enclosures or motor control centres. . System Control Type The basic control sequences which follow are to be used as

21、a guide for the type of operation desired. Variations are to be expected depending upon the individual system being designed. Refer to relevant BMS schematics for these systems characteristics. 1. Ventilation: 100% outdoor air with duct heating coil (single zone) 100% Fan Off: Outdoor air damper clo

22、sed and heating coil valves shall be closed. Fan On: Outdoor air damper open. Temperature sensor in fan discharge duct controls heating coil valve to maintain discharge temperatureInterContinental Hotels Group - Asia Pacific2009-REV-01 All Rights Reserved84 ENGINEERING STANDARDS SECTION 2 - HEATING,

23、 VENTILATION AND AIR CONDITIONING Low temperature switch on leaving side of heating coil stops fan when air temperature drops below set point, through time delay relay. Pressure switch at fan inlet stops fan on excessive suction pressure. Refer to drawing N 2.05.2 N2.05.22.Ventilation: 100% outdoor

24、air with duct heating coils (multi-zone)100% Fan Off: Outdoor air damper closed and heating coil valves closed. Fan On: Outdoor air damper open. For each heating coil, a submaster sensor on leaving side of coil, reset by a room sensor, controls heating coil valve to maintain adjustable room temperat

25、ure. Low temperature switch on leaving side of each heating coil stops fan when air temperature drops below set point, through time delay relay. Pressure switch at fan inlet stops fan on excessive suction pressure. Pressure switch at fan discharge starts fan on high discharge pressure (where require

26、d). Refer to drawing N 2.05.3 N2.05.33.Ventilation: 100% outdoor air with preheat and reheat coil in unit100% Fan Off: Outdoor air damper, reheat coil valve closed and each preheat coil valve under control of individual temperature sensors on leaving side of each preheat coil section. Fan On: Outdoo

27、r air damper open. Sensor on leaving side of preheat coil controls preheat coil valve to maintain adjustable leaving temperature. Sensor in fan discharge duct controls reheat coil valve to maintain discharge temperature. Low temperature switch on leaving side of preheat coil stops fan when air tempe

28、rature drops below set point, through time delay relay. Pressure switch at fan inlet stops fan on excessive suction pressure. Refer to drawing N 2.05.4InterContinental Hotels Group - Asia Pacific2009-REV-01 All Rights Reserved85 ENGINEERING STANDARDS SECTION 2 - HEATING, VENTILATION AND AIR CONDITIO

29、NING N2.05.44.Ventilation: 100% outdoor air with preheat coil in unit and reheat coils in ducts100% Fan Off: Outdoor air damper closed, reheat coil valve closed and each preheat coil valve under control of individual temperature sensors on leaving side of each preheat coil section. Fan On: Outdoor a

30、ir damper open. Sensor in fan discharge duct controls preheat coil valve to maintain discharge temperature. For each reheat coil, room sensor controls reheat coil valve to maintain adjustable room temperature. Low temperature switch on leaving side of preheat coil stops fan when air temperature drop

31、s below set point, through time delay relay. Pressure switch at fan inlet stops fan on excessive suction pressure. Pressure switch at fan discharge stops fan on high discharge pressure (where required). Refer to drawing N 2.05.5 N2.05.55.Air Conditioning: 100% outdoor air, constant volume with cooli

32、ng coil and reheat coil.100% Fan Off: Outdoor air damper closed, cooling coil valve and reheat coil valve closed Fan On: Outdoor air damper open. Submaster temperature sensor in fan discharge duct, reset by room temperature sensor, shall control heating coil valve and cooling coil valve in sequence,

33、 to maintain room temperature. Room humidity sensor shall also operate cooling coil valve for dehumidification to maintain a maximum of 50% relative humidity. The temperature or humidity sensor calling for the most cooling shall position the cooling coil valve. Pressure switch at fan inlet stops fan

34、 on excessive suction pressure. Refer to drawing N 2.05.6 N2.05.66.Air Conditioning: 100% outdoor air, constant volume with preheat, cooling and reheat coil(s) sequence.100%7.Fan Off: Outdoor air damper closed, cooling coil valve, and reheat coil valve(s) closed, and each pre-heat coil valve under c

35、ontrol of individual temperature sensors on leaving side of each preheat coilsection.InterContinental Hotels Group - Asia Pacific2009-REV-01 All Rights Reserved86 ENGINEERING STANDARDS SECTION 2 - HEATING, VENTILATION AND AIR CONDITIONING Fan On: Outdoor air damper open. Preheat coil valve under con

36、trol of temperature sensor on leaving side of preheat coil. For each reheat coil, a room temperature sensor shall control respective reheat coil valve and cooling coil valve in sequence, to maintain room temperature. Room humidity sensor shall also operate the cooling coil valve for dehumidification

37、 to maintain a maximum of 50% relative humidity. The temperature sensor or humidity sensor calling for the most cooling shall position the cooling coil valve. Low temperature switch on entering side of cooling coil stops fan when air temperature drops below set point, through time delay relay. Press

38、ure switch at supply fan inlet stops fan on excessive suction pressure. Refer to drawing N 2.05.7 N2.05.78.Air Conditioning: Constant volume, fixed minimum outdoor air with cooling coil and reheat coil(s).Return air ducted to supply unit. Fan Off: Outdoor air damper closed, cooling coil valve and re

39、heat coil valve(s) closed. Fan On: Outdoor air damper open. For each reheat coil, a room temperature sensor shall control respective reheat coil valve and cooling coil valve to maintain room temperature. A room humidity sensor shall also operate the cooling coil valve for dehumidification to maintai

40、n a maximum of 50% relative humidity. The temperature sensor or humidity sensor calling for the most cooling shall position the cooling coil valve Provide cool-down switch to close outdoor air damper to permit system operation under full recirculated mode for periods of non-occupancy. Pressure switc

41、h at supply fan inlet stops fan on excessive suction pressure. Pressure switch at return fan stops fan on high discharge pressure. Refer to drawing 2.05.8 N2.05.89.Air conditioning: Constant volume, variable outdoor air with preheat coil, cooling coil and reheat coil.InterContinental Hotels Group -

42、Asia Pacific2009-REV-01 All Rights Reserved87 ENGINEERING STANDARDS SECTION 2 - HEATING, VENTILATION AND AIR CONDITIONING Supply Air and Return Fans Off: Outdoor air damper, spill air damper and return air damper closed, cooling coil valve and reheat coil valve closed, each preheat coil valve under

43、control of individual temperature sensors on leaving side of each preheat coil section. Supply and Return Fans On: Outdoor air dampers open to minimum position, return air damper opens, preheat coil valve under control of sensor in leaving side of preheat coil. During winter operation submaster sens

44、or in fan discharge duct, reset by room thermostat, shall control, in sequence, preheat coil valve, variable outdoor air, return air dampers, cooling coil valve and reheat core valve to maintain room temperature. In summer operation submaster sensor, reset by room thermostat shall control in sequenc

45、e preheat coil valve, cooling coil valves and reheat coil valves to maintain room temperature. A summer-winter enthalpy switch shall switch the system from winter to summer operation. Room humidity sensor shall also operate cooling coil valve for dehumidification to maintain a maximum of 50% relativ

46、e humidity. The room temperature sensor or humidity sensor calling for the most cooling shall position the cooling coil valve. / Low temperature switch on entering side of cooling coil shall stop both supply and return fans when temperature drops below set point, through time delay. Pressure switch

47、at supply fan inlet stops fan on excessive suction pressure. Provide warm-up/cool-down switch to close outdoor dampers and open return air dampers to permit system operation under full recirculation mode for periods of non-occupancy. Spill damper is controlled by static pressure set point. Refer to

48、drawing N 2.05.9 N2.05.910. Air Conditioning: Variable volume, preheat and cooling coils, variable volume boxes with heating coil Supply and Return Fan Off: Outdoor air, spill air and return air dampers closed, cooling coil valve closed, supply fan and return fan inlet vanes to minimum position. Eac

49、h preheat coil valve under control of individual temperature sensors on leaving side of each preheat coil section. Supply and Return Fan On: A time delay switch should permit return air damper to open, then the minimum outdoor air damper shall open and the fans shall start. Preheat coil under contro

50、l of a sensor on the leaving side of the coil. In summer operation a thermostat in fan discharge duct shall control the preheat and cooling coil valve to maintain scheduled supply air temperature. In winterInterContinental Hotels Group - Asia Pacific2009-REV-01 All Rights Reserved88 ENGINEERING STAN

51、DARDS SECTION 2 - HEATING, VENTILATION AND AIR CONDITIONING operation the thermostat shall control in sequence variable outdoor damper return air damper preheat coil continue valve and cooling cool control valve to maintain schedules supply air temperature. A static pressure sensor, located midway i

52、n the supply duct, shall control the inlet vanes of the supply and return air fans. Return air volume shall vary compatibly with the supply air volume. A static pressure transmitter located in the supply fan discharge duct shall measure fan discharge static pressure. If the fan discharge static pres

53、sure exceeds its set point, a high limit controller shall A room temperature sensor shall control each interior variable volume box damper motor to maintain an adjustable room temperature. For each variable or constant volume box with reheat coil, a room sensor shall control, in sequence, damper mot

54、or on the box and normally closed reheat coil control valve to maintain adjustable room temperature. The reheat coil valve shall close when all fans are stopped. A summer-winter enthalpy switch shall switch the system from winter to summer operation. / A differential switch in each intake plenum sha

55、ll stop fans on excessive suction pressure. Provide warm-up/cool-down switch to close outdoor air and spill air dampers and open return air dampers to permit system operation under full recirculation mode for periods of non-occupancy. Refer to drawing N 2.05.10 N2.05.1011. Exhaust Fans Sequence Fan

56、Off: Discharge damper closed. Fan On: Discharge damper open. High temperature sensor or smoke detector on suction side of fan stops when air temperature rises above 51C (125F). 5112512. Lighting Control Corridor, back-of-house areas and exterior lighting shall automatically be controlled by the DDC

57、system, based on time of day schedule or an astronomic software programme. The DDC system shall activate digital outputs to lighting panels to turn on various lighting zones. Refer to Electrical SectionInterContinental Hotels Group - Asia Pacific2009-REV-01 All Rights Reserved89 ENGINEERING STANDARD

58、S SECTION 2 - HEATING, VENTILATION AND AIR CONDITIONING of the contract Specifications for quantity and location. The lighting panels shall be provided for in the latter. Provide 10% spare digital outputs. Primary Chilled and Hot Water Systems: When two-way valves are used at equipment, a differenti

59、al pressure control, piped to sense the supply and return line pressures, shall control a bypass water valve to maintain a constant differential pressure between the supply and return lines. . Point Matrix Provide DI, DO, AI & AO matrix for approval of IHG.InterContinental Hotels Group - Asia

60、 Pacific2009-REV-01 All Rights Reserved90 Notes: 1.Provide high temperature thermostat for all air systemswhere smoke detectors are not provided.2.Provide alarm annunciation at operator work station.3.Provide high and low limit alarmannunciationatoperational work. Fan StatusDIFan Excessive Suction P