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2. Designing of water circuit system

(1) Example of basic water circuit

The water circuit of the water heat source CITY MULTI connects the heat source unit with the cooling tower/auxiliary heat
source/heat storage tank/circulation pump with a single system water piping as shown in the figure below. The selector valve
automatically controls to circulate water toward the cooling tower in the cooling season, while toward the heat storage tank in
the heating season. If the circulation water temperature is kept in a range of 10~45°C[50~113°F]* regardless of the building
load, the water heat source CITY MULTI can be operated for either cooling or heating. Therefore in the summer when only
cooling load exists, the temperature rise of circulation water will be suppressed by operating the cooling tower. While in the
winter when heating load increases, the temperature of circulation water may be dropped below 10°C[50°F].
Under such situation, the circulation water will be heated with the auxiliary heat source if it drops below a certain temperature.
When the thermal balance between cooling and heating operation is in a correct proportion, the operation of the auxiliary heat
source and cooling tower is not required.
In order to control the above thermal balance properly and use thermal energy effectively, utilizing of heat storage tanks, and
night-time discounted electric power as a auxiliary heat source will be economical.
Meantime as this system uses plural sets of heat source unit equipped with water heat exchangers, water quality control is
important. Therefore it is recommended to use closed type cooling towers as much as possible to prevent the circulation water
from being contaminated.
When open type cooling towers are used, it is essential to provide proper maintenance control such as that to install water
treatment system to prevent troubles caused by contaminated circulation water.

E.H

S.T

T

T

C.T.P

C.T

P

3-way valve

Example of basic water circuit for water heat source CITY MULTI

S.T

: Heating tank

(Heat storage tank)

C.T

: Cooling tower

C.T.P

: Cooling water pump

P

: Circulation water pump

T

: Thermostat for water

E.H :

Electric

heater

: Heat source unit for cooling

operation

: Heat source unit for heating

operation

The indoor unit and refrigerant piping system are excluded in this figure.

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Содержание PQHY-P250YHM-A

Страница 1: ...DATA BOOK PUHY P250YJM A BS PUHY P500YSJM A BS PQHY P250YHM A PFD P250VM E PFD P500VM E MODEL ...

Страница 2: ... connect each ca ble so that the terminals do not carry the weight of the cable Improperly connected or fixed cables may produce heat and start a fire Take appropriate safety measures against strong winds and earthquakes to prevent the unit from falling If the unit is not installed properly the unit may fall and cause serious injury to the person or damage to the unit Do not make any modifications...

Страница 3: ...in stalling the unit Leaked refrigerant gas exceeding the lim iting concentration causes oxygen deficiency Consult your dealer or a specialist when moving or re installing the unit Improper installation may result in water leakage electric shock and or fire After completing the service work check for a gas leak If leaked refrigerant is exposed to a heat source such as a fan heater stove or electri...

Страница 4: ...frigerant is charged into the system the com position of the refrigerant in the cylinder will change and may result in performance loss Use a vacuum pump with a reverse flow check valve If a vacuum pump that is not equipped with a reverse flow check valve is used the vacuum pump oil may flow into the refrigerant cycle and cause the refrigerating machine oil to deteriorate Prepare tools for exclusi...

Страница 5: ...Doing so may lead to a re markable drop in performance electric shock malfunc tions smoke and or fire The presence of organic solvents or corrosive gas i e ammonia sulfur compounds and acid may cause gas leakage or water leakage When installing the unit in a hospital take appropriate measures to reduce noise interference High frequency medical equipment may interfere with the normal operation of t...

Страница 6: ...copper wires may result in malfunctions smoke and or fire Do not spray water on the air conditioner or immerse the air conditioner in water Otherwise electric shock and or fire may result When handling units always wear protective gloves to protect your hands from metal parts and high tempera ture parts Periodically check the installation base for damage If the unit is left on a damaged platform i...

Страница 7: ...nit such as pipes and compressor may be either very cold or hot depending on the state of the refrigerant in the unit at the time To reduce the risk of frost bites and burns do not touch these parts with bare hands Do not operate the unit without panels and safety guards Rotating high temperature or high voltage parts on the unit pose a risk of burns and or electric shock Do not turn off the power...

Страница 8: ... 2 PFD P500VM E two refrigerant circuit system 3 PFD P500VM E single refrigerant circuit system 4 Refrigerant charging calculation 2 Designing of water circuit system 31 1 Example of basic water circuit 2 Cooling tower 3 Auxiliary heat source and heat storage tank 4 Piping system 5 Practical System Examples and Circulation Water Control 6 Pump interlock circuit 3 Water piping work 42 1 Items to be...

Страница 9: ...r Duct Air Conditioners 58 2 Features of air conditioner for computer room 58 3 Step by Step Plan for the Implementation of the Air Conditioning 59 4 Conditions for the Installation of Computer Room Air Conditioners 60 1 Outdoor Temperature and Humidity 2 Indoor Temperature and Humidity 3 Matching the Volume of Air Flow 4 Considering a Back up Air Conditioning System 5 Setting the Air conditioners...

Страница 10: ...efrigerant circuit 3 Indicates TB7 type transmission line that allows the unit to communicate with the controller When using a PFD P500VM E as an indoor unit connect 1 PUHY P500YSJM A outdoor unit to each indoor unit and operate with a built in remote controller for the indoor unit 1 Bold line indicates refrigerant piping gas liquid This system consists of single refrigerant circuit 2 Indicates TB...

Страница 11: ...indicates refrigerant piping gas liquid This system consists of two refrigerant circuits 2 Indicates TB3 type transmission line that connects the indoor and outdoor units This system consists of two refrigerant circuit 3 Indicates TB7 type transmission line that allows the unit to communicate with the controller Two refrigerant circuits 24V DC M NET PAC SC51KUA Outdoor Unit Heat source unit AG 150...

Страница 12: ... 30 25 20 15 10 5 10 5 0 5 10 15 20 25 30 35 40 45 50 Indoor temperature CWB Circulating water temperature C 30 25 20 15 10 5 10 5 0 5 10 15 20 25 30 35 40 45 50 Indoor temperature CDB Circulating water temperature C 30 25 20 15 10 10 15 5 0 5 10 15 20 25 30 35 40 45 Indoor temperature CWB Outdoor temperature CDB 30 25 20 15 10 5 10 15 20 5 0 5 10 15 20 25 30 35 40 Indoor temperature CDB Outdoor t...

Страница 13: ...he indoor unit requires setting change and pipe work Installation foundation work electric connection work duct work insulation work power source switch and other items are not specified in the specifications 28 0 31 5 3N 380 400 415V 50 60Hz Capacity Model name kW Power source 1 2 kW A m3 min kW kW kW mm dB A kg Power input Current Fan Airflow rate Type x Quantity Motor output Type Motor output C...

Страница 14: ...red in anechoic room Installation foundation work electrical connection work duct work insulation work power source switch and other items shall be referred to the Installation Manual Indoor 27 CDB 19 CWB Indoor 20 CDB Pipe length 7 5m Outdoor 35 CDB Outdoor 7 CDB 6 CWB Level difference 0m Cooling Heating Capacity Model name Power source Power input Current Type Motor output Compressor Refrigerant...

Страница 15: ...le Hole for the power supply Body Nomal Local 1380 Remote controller A Refrig piping gas ø22 2 braze Power supply White Operating Green Check Yellow Failure Red Accessory Filter Lamp view from A 320 220 1950 20 100 462 580 Panel ø32 knock out hole Air inlet Control box 50 140 Hole for the control wiring ø32 knock out hole Main drain piping connection Rp1 1 4 Accessory Lifting bolts 4pc Front panel...

Страница 16: ...opening and closing dimension Indoor unit Unit surface figure Service space 400 or more Unit front figure 1000 or more 1 200 or more 1 It is necessary for the removal of the panel beyond 600mm 500 or more 710 Refrig piping gas in 2 refrig circuit system type P450 ø 19 05 braze type P560 ø 22 2 braze No 2 680 2 ø 32 knook out hole ø 32 knook out hole Air outlet Air inlet Power supply White Operatin...

Страница 17: ... hole 2X5 ø 4 6 Hole Make hole at the plastic fan guard for snow hood attachment 150 150 150 150 80 18 884 18 760 920 Snow hood attachment hole Top view 1710 1410 1650 240 Intake air Service panel Control box Intake air 60 72 90 102 98 204 251 132 88 2X2 14X20 Oval hole front and back 2 points Note 2 Detachable leg 6 4 3 1 Front view 221 150 83 251 186 145 760 18 18 86 80 80 92 Refrigerant service...

Страница 18: ...pipes as shown in the figure above Refer to the table above for the pipe size 2 The detachable leg can be removed at site 3 Twinning Kit should not be tilted more than 15 degrees from the horizontal plane Be sure to see the Installation Manual for details of Twinning Kit installation 4 The pipe section before the Twinning Kit sections a and b in the figure must have at least 500mm of straight sect...

Страница 19: ...prevent the pipe burst by the water pipe freeze up Circulate the water all the time even if the heat source unit is not in operation Drain the water from inside of the heat source unit when the heat source unit will not operate for a long term Note 7 Ensure that the drain piping is downward with a pitch of more than 1 100 Note 8 The detachable leg can be removed at site Note 9 At brazing of pipes ...

Страница 20: ... 11 3 Center of Gravity 1 Indoor unit PFD P250VM E PFD P500VM E Y L X Z Y L X Z Model L X Y Z PFD P500VM E 580 967 270 714 Model L X Y Z PFD P250VM E 580 581 222 739 Unit mm Unit mm ...

Страница 21: ...t Heat source unit PUHY P250YJM A BS PQHY P250YHM A Model X Y Z PUHY P250YJM A BS 334 329 652 1100 60 550 880 506 Y X Z 1160 80 720 Model X Y Z PQHY P250YHM A 418 250 532 Unit mm Unit mm 760 80 Y 724 1470 Z 60 920 X 760 ...

Страница 22: ...ection 51F Z1 ZNR2 52F Z3 51F 52F MF TH24 TH21 TH22 TH23 6 5 4 3 2 1 LEV SYMBOL NAME DSA1 Surge absorber LED display power supply F901 ZNR1 ZNR2 ZNR901 MF I B S B IFB TB2 TB5 TB15 TB21 TB22 TB23 F1 T LEV 52F 51F 33P1 RC L4 L3 L2 L1 Z3 Z1 X11 SWC I B SW14 I B SW12 I B SW11 I B SW9 SW4 I B SW3 I B SW2 I B SW1 I B Surge absorber board Switch outlet inlet temp control Float switch Fuse 6 3 6A Varistor...

Страница 23: ...current detection 51F Z1 ZNR2 Z2 52F Z3 TH24 2 TH21 2 TH22 2 TH23 2 51F 52F MF NAME SYMBOL Surge absorber DSA1 L5 ZNR1 ZNR2 ZNR901 LED display No 2 failure LED display status LED display check LED display power supply MA Remote controller RC TB21 TB15 TB5 1 2 TB2 IFB S B AD B I B 1 I B 2 MF Surge absorber board Switch outlet inlet temp control Float switch Varistor Transformer Electronic linear ex...

Страница 24: ...red D1 R4 Z5 1 SV9 R631 white TH2 t C8 red CNIT yellow CNS2 t 1 1 LED1 Display setting CN51 12V Function setting SW1 10 1 CN212 CNTYP4 green F4 AC250V 6 3A T R5 F3 F1 Z4 R2 F2 3 3 2 Compressor ON OFF output Error detection output CN201 Z25 1 4 1 1 1 TH3 Z3 3 Z2 U ON OFF SW2 10 1 SWU2 LED1 C4 C35 C37 R31 R33 R30 ON SW3 10 Control Board TH7 CN40 63HS1 CN41 TH6 t t TH4 3 2 2 2 1 SW5 LED3 Lit when pow...

Страница 25: ...are securely locked in place after insertion Press the tab on the terminals to removed them 6 Control box houses high voltage parts Before inspecting the inside of the control box turn off the power keep the unit off for at least 10 minutes and confirm that the voltage between FT P and FT N on INV Board has dropped to 20VDC or less 7 Refer to the Data book for wiring terminal block for Pump Interl...

Страница 26: ... part 12 7 12 7 12 7 12 7 Local brazing Note 2 15 88 15 88 28 58 Note 2 25 4 22 2 25 4 22 2 Pipe cover Dot dashed part Local brazing 28 58 2 pcs 22 2 19 05 12 7 15 88 12 7 9 52 28 58 22 2 For Gas pipe For Liquid pipe ID Inner Diameter OD Outer Diameter mm CMY Y100VBK2 Deformed pipe Accessory The angle of the branch pipe is within against the ground 2 Use the attached pipe to braze the port opening...

Страница 27: ...2 1 3 15 10 5 0 5 10 15 20 25 30 35 40 45 Outdoor unit inlet temperature CDB Capacity correction coefficient 0 7 0 8 0 9 1 0 1 1 1 2 1 3 1 5 1 4 15 10 5 0 5 10 15 20 25 30 35 40 45 Outdoor unit inlet temperature CDB 19 15 12 24 Ratio Water volume m3 h Water volume m3 h Water pressure drop kPa Capacity Input 4 5 6 7 8 Capacity Input Inlet water temp C Ratio Ratio Intake air temp Room temp CWB Capac...

Страница 28: ...0 95 10 01 9 21 8 32 7 47 Indoor air temperature condition 27 CDB 19 CWB Outdoor unit inlet temp CDB System Power input kW Outdoor unit inlet temp CDB System Power input kW 10HP System Indoor Unit PFD P250VM E Heat source Unit PQHY P250YHM A Indoor air temperature condition 27 CDB 19 CWB 20HP System Indoor Unit PFD P500VM E Heat source Unit PQHY P250YHM A 2 Indoor air temperature condition 27 CDB ...

Страница 29: ...g length to the farthest indoor unit 0 42 number of bent on the piping m 2 PUHY P500YSJM A Equivalent length Actual piping length to the farthest indoor unit 0 50 number of bent on the piping m How to obtain piping equivalent length Piping equivalent length m Capacity correction coefficient 0 7 0 8 0 9 1 0 20 40 60 80 100 120 140 160 180 0 9 0 95 1 1 05 Airflow rate m3 min Capacity correction fact...

Страница 30: ...re 27 CDB 35 45 55 65 75 0 4 0 5 0 6 0 7 0 8 0 9 1 30 40 50 60 70 80 RH SHF 120 110 100 90 80 70 Standard Capacity Ratio Standard Capacity Ratio 0 4 0 5 0 6 0 7 0 8 0 9 1 30 40 50 60 70 80 RH SHF 120 110 100 90 80 70 35 45 55 65 75 35 45 55 65 75 Operation Temparature Range Indoor 12 CWB 24 CWB Outdoor 15 CDB 43 CDB RH 30 80 Standard Point Indoor 27 CDB 19 CWB Outdoor 35 CDB Indoor Temperature 24 ...

Страница 31: ...8 Series Sound pressure level dB Type A PUHY P500YSJM A 61 Series Sound pressure level dB Type A PQHY P250YHM A 49 Measurement location Sound insulating floor Measured in anechoic room Measured without effect of discharge air External pressure is 120Pa Indoor unit Outdoor unit Heat source unit 1m 1m Measurement location Measurement location 1m 1m Measurement location 1m 1m ...

Страница 32: ...d sound level dB PUHY P250YJM A Standard 50 60Hz Low noise 50 60Hz Standard 50 60Hz Low noise 50 60Hz 63 125 250 500 1k 2k 4k 8k NC 40 NC 30 NC 20 NC 60 NC 50 NC 70 Octave band central frequency Hz Approximate minimum audible limit on continuous noise 63 125 250 500 1k 2k 4k 8k dB A Standard 60 0 63 0 61 0 55 0 52 0 47 5 42 5 36 5 58 0 Low Noise Mode 58 0 54 0 44 0 39 5 37 0 33 0 31 5 25 0 44 0 Wh...

Страница 33: ...0 B52 B51 1015 B54 B50 978 B55 B53 905 B58 B56 850 B58 B55 803 B55 780 Note1 Pulley and V belt is procured on site Note2 Mitsubishi Electric shall not be held responsible for the pulley modified on site Ø315 B 2 42 Ø165 B 2 38 Ø315 B 2 42 Ø355 B 2 42 Ø160 B 2 38 Ø170 B 2 38 Ø250 B 2 42 Ø236 B 2 42 Ø250 B 2 42 Ø250 B 2 42 Ø160 B 2 38 Ø160 B 2 38 Ø280 B 2 42 Ø180 B 2 38 Ø300 B 2 42 Ø250 B 2 42 Ø180 ...

Страница 34: ...280 300 315 355 211 223 235 247 261 291 311 326 366 80 80 80 80 80 80 80 90 90 45 3 45 3 45 3 45 3 45 3 45 3 45 3 45 3 45 3 F mm 12 12 12 12 12 12 12 12 12 42 Shape of the pulley unit mm Shape of the V belt unit mm 40 16 5 11 0 H outer center M8 Rz 6 3 Rz 3 2 Rz 6 3 Rz 6 3 19 Rz 3 2 Rz 3 2 keyway 5 5 12 5 59 44 12 5 R z 3 2 Rz 6 3 Rz 6 3 D C d Pulley outside diameter A dm Pulley nominal diameter 1...

Страница 35: ...ery 2000 hours of operation The belt is due for replacement when the belt has been stretched by 2 of its original length including the initial stretch of 1 Approx 5000 hours of operation Apply Screwlock not supplied to the retention screw on the pulley to prevent the screw from loosening Tighten the screw to the torque of 13 5 N m Screwlock Equivalent to ThreeBond 1322N Table 1 Horizontal alignmen...

Страница 36: ...able IV 1 1 2 Bent equivalent length M M m bent Outdoor Model PQHY P250 0 42 Table IV 1 1 1 Piping length m Max length Piping in the figure Item Max equivalent length A Height between OU HU and IU OU HU above IU Height between OU HU and IU OU HU under IU OU Outdoor Unit IU Indoor Unit HU Heat source Unit 190 165 Farthest IU from OU HU L H H 50 40 mm Outdoor Pipe Gas Pipe Liquid PQHY P250 ø22 20 ø9...

Страница 37: ...rule mm Indoor Unit size Pipe Gas Pipe Liquid P500 ø22 20 ø9 52 Table IV 1 2 4 Indoor unit piping size selection rule PUHY P250 ø22 20 ø9 52 1 PUHY P250 0 42 IU Indoor unit OU Outdoor unit HU Heat source unit Note1 If the PUHY system is designed to use cooling mode under outdoor temperature 10 C H 15m Note2 As bents cause pressure loss on transportation of refrigerant fewer bents design is better ...

Страница 38: ... Install the pipes from the outdoor unit to the branch joint with a downward incline If the length of pipe between the branch joint and outdoor unit exceeds 2 m provide at rap at a distance 2 m or less from the branch joint OK NG OU OU max Table IV 1 3 2 Bent equivalent length M M m bent Outdoor Model PUHY P500 0 50 Table IV 1 3 1 Piping length m Max length Piping in the figure Item Max equivalent...

Страница 39: ...nstalled liquid pipes and their length Calculate the amount of refrigerant to be charged according to the formula below Round up the calculation result to the nearest 0 1kg i e 16 08 kg 16 1 kg Amount of refrigerant to be charged Calculating the amount of refrigerant to be charged Amount of factory charged refrigerant Sample calculation Total length of ø15 88 liquid pipe x 0 2 m x0 2 kg m A ø9 52 ...

Страница 40: ...When the thermal balance between cooling and heating operation is in a correct proportion the operation of the auxiliary heat source and cooling tower is not required In order to control the above thermal balance properly and use thermal energy effectively utilizing of heat storage tanks and night time discounted electric power as a auxiliary heat source will be economical Meantime as this system ...

Страница 41: ...Calculation method of cooling tower capacity All units of the water heat source CITY MULTI may possibly be in cooling operation temporarily at pulling down in the summer however it is not necessary to determine the capacity according to the total cooling capacity of all CITY MULTI units as this system has a wide operating water temperature range 10 45 C 50 113 F It is determined in accordance with...

Страница 42: ...ime lighting Solar heat Please note that the auxiliary heat source should be selected after studying your operating environment and economical fea sibility For the CITY MULTI water heat source system a heat storage tank is recommended to use When employment of the heat storage tank is difficult the warming up operation should be arranged to cover the starting up heating load Since the holding wate...

Страница 43: ...ne kcal h Q e3 Thermal load from equipment in each zone kcal h ψ Radiation load rate 0 6 0 8 T2 Air conditioning hour 1 COPh HQ1T 1 3 412 x Pw x T2 QH x K BTU T1 QH1T Total of heating load on weekday including warming up BTU day T1 Operating hour of auxiliary heat source h T2 Operating hour of heat source water pump h K Allowance factor Heat storage tank piping loss etc 1 05 1 10 HQ1T is calculate...

Страница 44: ... load including load required for the day after the holiday kcal day ΔT Temperature difference utilized by heat storage tank C ηV Heat storage tank efficiency HQ2T 1 3 x ΣQ a ΣQ c ΣQ d ΣQ f T2 ψ ΣQe2 ΣQe3 T2 1 1 COPh HQ2T 1 3 412 x Pw x T2 V Ibs ΔT x ηV HQ2T Maximum heating load including load required for the day after the holiday BTU day ΔT Temperature difference utilized by heat storage tank F ...

Страница 45: ... water caused by temperature fluctuation e If the operating temperature range of circulation water stays within the temperature near the normal temperature summer 29 4 C 85 F winter 21 1 C 70 F thermal insulation or anti sweating work is not required for the piping inside buildings In case of the conditions below however thermal insulation is required When well water is used for heat source water ...

Страница 46: ...he summer as the circulation water temperature rises exceeding the set temperature of T1 the bypass port of V1 will open to lower the circulation water temperature While in the winter as the circulation water temperature drops V2 will open following the command of T2 to rise the circulation water temperature The water inside the heat storage tank will be heated by the auxiliary heat source by V3 b...

Страница 47: ... by interlocking thus preventing the high temperature water from entering into the system at the starting of the pump The start stop control of the fan and pump of the closed type cooling tower is applied with the step control of the fan and pump following the command of the auxiliary switch XS of V1 that operates only the fan at the light load while the fan and pump at the maximum load thus contr...

Страница 48: ...he bypass port of V2 will be closed fully by interlocking The start stop control of the fan and pump of the closed type cooling tower is applied with the step control following the command of the auxiliary switch XS of V1 thus controlling water temperature and saving motor power Heat source unit Closed type cooling tower T1 Proportional type insertion system thermostat T2 Proportional type inserti...

Страница 49: ...r pump the bypass port of V2 will be closed fully by interlocking The start stop control of the fan and pump of the closed type cooling tower is applied with the step control following the command of the auxiliary switch XS of V1 thus controlling water temperature and saving motor power Heat source unit Closed type cooling tower T1 Proportional type insertion system thermostat T2 Proportional type...

Страница 50: ...ource water pump MP Heat source water pump MCB Circuit breaker Remove the short circuit wire between 3 and 4 when wiring to TB8 This circuit uses the Terminal block for pump interlock TB8 inside the electrical parts box of the heat source equipment This circuit is for interlocking of the heat source equipment operation and the heat source water pump Wiring diagram Operation ON signal Pump Interloc...

Страница 51: ...the entry of fresh outdoor air Drain piping portions 3 Water treatment and water quality control For the circulation water cooling tower of the CITY MULTI WY system employment of the closed type is recommended to keep water quality However in the case that an open type cooling tower is employed or the circulating water quality is in ferior scale will adhere onto the water heat exchanger leading to...

Страница 52: ...D type indoor units cannot be grouped with other types of indoor units 1 Specifications of control wiring and maximum length of wiring Control cables are categorized into two types transmission cable and remote controller cable Use the appropriate type of cables and observe the maximum allowable length specified for a given system configuration When the source of noise is located adjacent to the u...

Страница 53: ... setting Model Indoor unit Main Sub IC 01 50 Note 1 In case of 10HP system or 20HP system with one refrigerant circuit assign an odd number starting with 01 In case of 20HP system with two refrigerant circuits assign a sequential odd number starting with 01 to the upper indoor controller and assign the address of the upper indoor controller 1 to the lower indoor controller For the system with one ...

Страница 54: ...e switch settings on the controller circuit board following the instructions described in the installation manual for the indoor unit System configuration Connection to the system controller Power supply unit for transmission lines Grouping the indoor units connected to different outdoor units Power supply switch connector connection System in which indoor units connected to one outdoor unit Leave...

Страница 55: ...earth terminal of the OC and S terminal of the IC terminal block TB5 1 b Switch setting Address setting is required as follows OC TB3 TB7 M1 M2 M1 M2 S 51 IC TB5 1 A1B1 S 01 TB5 2 A2B2 S 02 A B TB15 1 2 MA L1 L2 Leave the male connector on CN41 as it is Leave the male connector on CN41 as it is OS TB3 TB7 M1 M2 M1 M2 S 52 One indoor controller controller circuit board is equipped in the indoor uni...

Страница 56: ...ine for centralized control Daisy chain terminals M1 and M2 on the terminal block for transmission line for centralized control TB7 on each outdoor unit OC Disconnect the male connector on the controller board from the female power supply switch connector CN41 and connect it to the female power supply switch connector CN40 on only one of the outdoor units Only use shielded cables Shielded cable co...

Страница 57: ...he system connect terminals 1 and 2 of the terminal block TB15 on the indoor unit IC to the terminal block on the MA remote controllers option Set the Main Sub switch on the connected MA remote controllers option to SUB See the installation manual for the MA remote controller for the setting method c Switch setting Address setting is required as follows IC TB5 1 A1B1S 01 TB5 2 A2B2 S 02 A B TB15 1...

Страница 58: ...erminal block TB15 on all indoor units IC Non polarized 2 core cable Set the Main Sub switch on one of the MA remote controllers to SUB c Switch setting Address setting is required as follows One indoor controller controller circuit board is equipped in the indoor unit 10HP and two indoor controllers controller circuit boards are equipped in the indoor unit 20HP IC TB5 1 A1B1S 01 TB5 2 A2B2 S 02 A...

Страница 59: ...ansmission line Same as 1 1 b Transmission line for centralized control Daisy chain terminals M1 and M2 on the terminal block for transmission line for centralized control TB7 on each outdoor unit OC Only use shielded cables Shielded cable connection To ground the shielded cable daisy chain the S terminals on the terminal block TB7 on each of the outdoor units c Switch setting Address setting is r...

Страница 60: ...th priority Level Refer to the wiring diagram Dehumidification command shown on the page 53 Function Usage Signals No 1 Operation Status Obtaining signals indicating operation status of indoor units in each refrigerant circuit Relay a contact output DC 30V or AC 220 240V Standard Current 1A Minimum Current 1mA No 1 Error Status Obtaining signals indicating error status of indoor units in each refr...

Страница 61: ...pressing of the SW Pulse input switches between ON and OFF Remote start stop Each pressing of the SW Pulse input switches between ON and OFF External power source Input without voltage applied Contact Minimum applicable load DC12V 1mA Contact rating DC12V 0 1A and over SW11 Relay contact output DC30V or less 1A AC220 240V 1A No 1 Operation Status Indicator Lamp L1 No 1 Error Status Indicator Lamp ...

Страница 62: ...the indoor unit that is connected to a two refrigerant circuit connect the short circuit plate that is supplied with the unit to the appropriate terminals on the external input output board Without the short circuit plate the unit will not function properly Don t connect the short circuit plate in case of a one refrigerant circuit CAUTION 1 Brown SW Dehumidification command Z Relay Contact Minimum...

Страница 63: ...0 240V wire since noise interference from such wire may cause the unit to malfunction 3 Do not bundle with minute voltage DC30V or below wire since noise interference from such wire may cause the unit to malfunction CAUTION 1 Wiring should be covered by insulation tube with supplementary insulation 2 Use relays or switches with IEC or equivalent standard 3 The electric strength between accessible ...

Страница 64: ...ng operation The unit resumes normal operation when the signal goes off or when the suction temperature reaches 13 C or below When the unit is in this control the unit is operated at the maximum capacity regardless of the actual setting so the room temperature may reach below the preset temperature If this is a problem install a circuit that turns off the dehumidification signal based on the room ...

Страница 65: ... SW1 9 ON SW1 10 OFF 4 Assign sequential addresses to the units as shown below Fig 8 1 Only use odd numbers for the 10HP system 5 Make the rotation group settings by setting the appropriate switches on the outdoor units 1 General Descriptions Each group can consist of a maximum of 5 systems and a minimum of 2 systems With the use of this control function one system in a given group serves as a bac...

Страница 66: ... the ceiling is better than air exhausting from the ceiling Fresh air supply solution refers to Fig 10 2 4 Note 1 Countermeasure 3 should be done in a proper way in which the fresh air supply shall be on whenever the leakage happens Note 2 In principle MITSUBISHI ELECTRIC requires proper piping design installation and air tight testing after installation to avoid leakage happening In the area shou...

Страница 67: ...the time the air exits the unit Close attention must be paid to the auto controlling system Dust in the duct space between the free access top floor and the existing floor must be thoroughly removed before installing the unit Since the existing floor is cooled by the unit it may produce dews on the ceiling of the room down below 2 Features of air conditioner for computer room Air conditioner for c...

Страница 68: ...e earthquake proof anti vibration floor load anti vibration device noise control etc Calculating the Load Setting the Conditions for the Room Temperature humidity Condition Purpose Making decisions on the computer system Accommodates possible future expansion ensuring the acquisition route Operation schedule Back up system in case of breakdowns power outage water supply cut offs etc Air conditioni...

Страница 69: ...he computer 3 Matching the Volume of Air Flow It is possible to use the fan on the computer to cool the room This controlling method requires a certain volume of cold air in proportion to the amount of heat produced by the device The inlet panel is located at the bottom of the unit and the exhaust pipe is located either on the ceiling front and back or on the side 4 Considering a Back up Air Condi...

Страница 70: ...installation of the new units 4 The following items need to be checked before calculating the unit capacity Floor area of the computer room m2 Total quantity of heat generated by computers 2 Sample Selection of Air Conditioners 2 1 Conditions 2 2 Building Conditions 1 Coefficient of Overall Heat Transmission U W m2 K 2 Internal Load Number of People in the Room 5 Lighting 20W m2 Calculator 20 9kW ...

Страница 71: ... 17 C outdoor CDB 32 C Capacity of the Moment 54 3kW SHF 0 92 Capacity of Sensible Heat 54 3 0 92 49 9 kW Standard Air Flow Volume 320m3 min can be accommodated with PUHY P250YJM A 2 and PFD P500VM E Computer 20 9 kW Lighting 1 800W 1 8 kW Number of people in the room 5 persons 64 U 0 32 kW Infiltration draft 0 2 times h 39 6m3 0 336 8 0 11 kW Outer wall heat transmission 8 5m2 3 6 8 0 25 kW Windo...

Страница 72: ...nclude a humidifier or a dehumidifier Install such components as necessary 1 2 Outdoor Unit Plenum floor Indoor unit Suction temperature sensor Discharge air temperature sensor 1 Bold lines in the diagram indicate refrigerant piping gas liquid This system consists of two refrigerant circuit 2 Indicates TB3 type transmission line used to communicate with the indoor unit This system is made up of tw...

Страница 73: ...re and or humidity fluctuate greatly 2 When plugged into an unstable power source sudden change in voltage frequency wave distortions Do not exceed the maximum capacity 3 When the unit is installed in a place where it receives vibrations or major impacts 4 When used in a place with poor air quality containing dust particles salt poisonous gas such as sulfuric acid gas and sulfuric hydrogen gas oil...

Страница 74: ...ation resistance Free of unusual sound Insulation resistance over 1M Replace if insulation resistance goes below 1M Make sure the lamp comes on Comes on when the output is on Rapid drop in brightness Replace if the light does not come on when the power is on Perform an operation check using the operation data Adequately controls the refrigerant temperature when the valve is switched Check temperat...

Страница 75: ......

Страница 76: ...nce on environmental management Through a wide range of businesses we are helping contribute to the realization of a sustainable society Warning Do not use refrigerant other than the type indicated in the manuals provided with the unit and on the nameplate Doing so may cause the unit or pipes to burst or result in explosion or fire during use during repair or at the time of disposal of the unit It...

Страница 77: ...ual WT04836X05 PFD P250 500VM E Instruction Book WT07347X02 PFD P250 500VM E Parts Catalogue BWE0609D PFD P250 500VM E Service Manual HWE1018A PFD P250 500VM E_Declaration_of_Conformity_ EU06001A PFD P250 500VM_Installation_Manual_ WT04836X02 PFD P250 500VM_Instruction_Book_ WT04835X01 PFD P250 500VM_Parts_Catalog_ BWE0609B PFD P250 500VM_Service_Manual_ HWE05250 PFD P250 500VM_Service_Manual_ HWE...

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