Honeywell W180 Скачать руководство пользователя страница 37

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68-0139

W180 ZONE CONTROL SYSTEM

2. Wire the sensor as shown in the job drawings and

Figs. 40 through 42.

3. Mount the space sensor circuit board on the mount-

ing plate (Fig. 43).

4. Mount the cover on the mounting plate (Fig. 44).

Fig. 40—T7660A Space Temperature Sensor
terminal connections.

Fig. 41—Typical T7660A Space Temperature
Sensor wiring.

LED

LED LIGHT

TEMPERATURE
SENSOR

ANALOG;
COMMON

DIGITAL;
COMMON

PUSHBUTTON

JUMPER W1

M8162

–1

–2

–3

–4

–5

–6

–7

–8

SENSOR/INPUT
CONNECTIONS

M8174

18-22 AWG
TWISTED PAIR

HONEYWELL T7660A SENSOR
MAXIMUM DISTANCE FROM CONTROLLER
IS 300 FT. [91 M] USING 18 AWG
THERMOSTAT WIRE.

SENSOR GND

CABLE SHIELD
(IF REQUIRED)

T7660A SENSOR

Fig. 42—Typical T7660B Space Temperature Sensor wiring.

–1

–2

–3

–4

–5

–6

–7

–8

SENSOR/INPUT
CONNECTIONS

M8175

22 AWG

SENSOR GND

SENSOR PWR

T7660B SENSOR

RLY 1

1/2 com

RLY 2

spare A

RLY 3

3/4 com

RLY 4

spare B

spare C

RLY 5

5/6 com

RLY 6

spare D

RLY 7

7/8 com

RLY 8

RELAY
CONNECTIONS

20 VDC

5 VDC

RTD SENSOR WIRES

220 ,
1/8 WATT

2.2K,
1/4 WATT

LED

Содержание W180

Страница 1: ...1 68 0139 W180 ZONE CONTROL SYSTEM J F 4 94 Honeywell Inc 1994 Form Number 68 0139 W180 Zone Control System M2815 ...

Страница 2: ...180 System Checkout Using a Touchpad 45 W180 System Checkout Using a PC 45 Program the System 45 Appendix A Troubleshooting 46 Appendix B Worksheets 48 HVAC Configuration Form 48 Homeowner Lifestyle Worksheet 49 Appendix C HVAC System Basics 52 Airflow Characteristics 52 Zoning 52 Purpose of Zoning 52 Zone Selection 52 Duct Systems 52 Loop Perimeter System 52 Radial Perimeter System 53 System Sizi...

Страница 3: ...heating and cooling for each W180A Controller depending on the equipment used Accommodates virtually any HVAC configuration and provides the following zoned or individual room temperature control Damper zoning Hydronic valve zoning Equipment zoning Combinationofdamper hydronicvalve andequip ment zoning Mixture of various HVAC systems Does not require bypass dampers Offers programmable HVAC equipme...

Страница 4: ... Blade Damper Bottom Mount AOBD SM Automatic Opposed Blade Damper Side Mount AOBD Automatic Opposed Blade Damper HBus A Honeywell communications protocol HVAC System A set of HVAC equipment that supplies heating and or cooling to one or more zones PC Personal Computer Schedule A day and time associated with the start of a profile System Configuration A unique grouping of equipment and zones that i...

Страница 5: ...equired for W180A Controller Foot mounted plate mounted on 4 x 4 in 4 in octagon or 2 x 4 in electrical boxes clamp mounted via a junction box knockout or panel mounted Additional transformer s required for dampers and valves AT140B1206 Transformer 24 Vac 40 VA transformer One required for W180A Controller Foot mounted Additional transformer s required for dampers and valves HIGH LIMIT CONTROLLER ...

Страница 6: ...06 96 61 712 10 x 18 254 x 457 180 116 078 6 x 18 152 x 457 108 69 464 10 x 20 254 x 508 200 129 032 6 x 20 152 x 508 120 77 216 12 inch 12 x 12 305 x 305 144 93 025 8 inch 8 x 8 203 x 203 64 41 209 12 x 14 305 x 356 168 108 580 8 x 10 203 x 254 80 51 562 12 x 16 305 x 406 192 123 830 8 x 12 203 x 305 96 61 915 12 x 18 305 x 457 216 139 385 8 x 14 203 x 356 112 72 268 12 x 20 305 x 508 240 145 940...

Страница 7: ...V8043E1111c 3 5 3 0 3 4 in sweat V8043E1129b a 3 5 3 0 1 2 in inverted flare V8043F1028d b 3 5 3 0 1 2 in sweat V8043F1036d b 3 5 3 0 3 4 in sweat V8043F1051d b 3 5 3 0 1 in sweat V8043F1093d b 8 0 6 9 3 4 in sweat V8043F1101d b 8 0 6 9 1 in sweat V8043J1003e 1 2 in sweat Normally open V8044A1002 4 0 3 4 1 2 in flare Port A normally closed 2 position diverting V8044A1010 4 0 3 4 1 2 in sweat V8044...

Страница 8: ...relay pairs Each relay in a pair can be configured for individual devices that are powered from a common source PORTS RS 232 for PC communication NUMBER OF W180 SYSTEMS THAT CAN BE CON NECTEDTOAHONEYWELLTotalHome SYSTEM One using HBus communications Additional W180 Systems can be connected to TotalHome only through contact closures to the W180 input configured as a Pro file Trigger input NUMBER OF...

Страница 9: ...Bus communications MODEL 198212CA 5 ft 1 5m cable attached SENSING RANGE 40 to 120 F 40 to 49 C SENSING ELEMENT 3000 ohms platinum positive tem perature coefficient 3484 6 5 ohms at 77 F 25 C 4 8 ohms per degree F 8 6 ohms per degree C CABLE LENGTH Maximum of 300 ft 90m with 18 AWG twisted pair solid or stranded wire For runs up to 150 ft 95m 22 AWG wire may be used Shielded cable is recommended f...

Страница 10: ...t proportion to the relative humidity ELECTRICAL RATINGS Input 20 Vdc provided by the W180A Controller Output 4 to 20 mA current signal increases from 4 mA to 20 mA as humidity increases Maximum Power Consumption 0 3 VA MAXIMUM POWER CONSUMPTION 0 48 VA AMBIENT TEMPERATURE RANGES Operating 32 to 125 F 0 to 52 C Shipping 40 to 150 F 40 to 66 C HUMIDITY RANGE 10 to 90 RH RESPONSE TIME 90 percent of ...

Страница 11: ... 90 seconds for 90 stroke MATERIALS Damper Blade 16 gauge corrosion resistant steel Blade Seal Neoprene rubber with UL94HF1 rating Damper Shell 24 gauge galvanized steel 60 to 10 inch 20 gauge galvanized steel 12 to 16 inch DIMENSIONS Damper Portion See Fig 9 Actuator See Fig 10 APPROVALS Underwriter s Laboratories Component Recognized File No E4436 Guide No XAPX CSA certified ACCESSORIES 201052B ...

Страница 12: ...005 D635C1004 D635D1003 D635E1002 D635F1001 D635G1000 28 3 50 3 78 5 113 1 153 9 201 1 6 15 24 8 20 32 10 25 40 12 30 48 14 35 56 16 60 64 12 30 48 12 30 48 12 30 48 13 33 02 15 38 10 17 43 18 0 05 0 167 0 075 0 254 0 1 0 339 0 05 0 167 0 075 0 254 0 1 0 339 0 05 0 167 0 075 0 254 0 1 0 339 0 05 0 167 0 075 0 254 0 1 0 339 0 05 0 167 0 075 0 254 0 1 0 339 0 05 0 167 0 075 0 254 0 1 0 339 180 210 2...

Страница 13: ...61 Direct Coupled Actuator dimensions in in mm 15 32 5 16 1 11 16 3 3 8 1 7 8 5 9 16 11 16 3 1 16 1 5 16 2 3 8 17 8 7 9 43 2 86 4 123 4 141 2 25 4 42 4 32 8 86 4 1 M2063B CW COM CCW 11 16 4 1 4 108 OPTIONAL AUXILIARY SWITCH 1 8 11 9 3 2 77 8 3 2 1 8 ...

Страница 14: ...lades reduce air turbulence noise vortexing and loss of air velocity DIMENSIONS AOBD See Fig 11 AOBD BM See Fig 12 ACCESSORIES Set of Damper Mounting Tracks Model SDMT Two U channel mounting tracks 12 in 305 mm long used to hold large size dampers multiple dampers and undersized dampers in proper alignment Fig 11 Automatic opposed blade damper dimensions 1 4 3 83 3 8 2 60 1 8 2 54 5 127 LISTED DAM...

Страница 15: ...R WIDTH IS 3 16 INCH 5 MILLIMETERS LESS THAN LISTED WIDTH DIMENSION LISTED DAMPER WIDTH ACTUAL AIR DUCT WIDTH ADDITIONAL SIZES AVAILABLE HEIGHT X WIDTH 16X16 16X18 16X20 18X18 18X20 20X20 SIZES NOT AVAILABLE HEIGHT X WIDTH 10X8 12X8 12X10 14X8 14X10 14X12 1 1 2 TOOLS REQUIRED The following tools and equipment are required to in stall a W180 Zone Control System Hammer Screwdriver flathead Pliers Wi...

Страница 16: ...C SERIAL PORT FEMALE 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 24 25 RXD TXD GND RXD TXD GND W180 FEMALE PC SERIAL PORT FEMALE RXD TXD GND RXD TXD GND W180 TO 25 PIN SERIAL PORT CABLE CONNECTIONS HONEYWELL PART NO 204119 WITH NULL MODEM 204169 M8160 Application GENERAL The following must be accomplished to properly plan a job and order the equipment Determine the W180...

Страница 17: ...e assignments There are a total of 24 relays available Add together all relays required to operate the HVAC equipment The remaining relay pairs can be used to operate dampers and valves Each modulating damper requires two relays in a relay pair All other valves and HVAC equipment loads require one relay each Calculate the total num ber of relays required by the proposed system The total number of ...

Страница 18: ...ature is above this temperature the stage is locked out 10 F 99 F 90 F Lockout Temperature Cool When the outdoor temperature is below this temperature the stage is locked out 10 F 99 F 50 F Outside Temp for Alt Eq Heat When the actual outdoor temperature is below this value any heating equipment set up during configuration as Alt Eq Heat will be activated in place of the equipment defined as Norma...

Страница 19: ...ndamper blades and cause improper operation For humidification use evaporative or return air type humidifiers Indoortemperaturesensors Onetemperaturesensor is required for each control zone three types of indoor temperature sensors can be used with the system C7130 C7180 and T7660 Locate indoor temperature sensors On an interior wall Near the return air flow Out of the sun Away from supply registe...

Страница 20: ...OWER THE CIRCULATION PUMP 18 AWG TWISTED PAIR SOLID OR STRANDED 300 FT 90 M MAX 22 AWG WIRE CAN BE USED FOR RUNS UP TO 150 FT 45 M DO NOT RUN WIRING WITH LOAD SWITCHING OR POWER WIRES USE SHIELDED CABLE FOR RUNS GREATER THAN 50 FT 15 M TO MINIMIZE ELECTRICAL NOISE ON SENSOR WIRES ACCESSORY SHIELDED CABLES FT M 4074CAV 50 15 4074CAW 100 30 4074CAY 200 61 18 22 AWG TWISTED PAIR SOLID OR STRANDED 100...

Страница 21: ... equipment Use isolating relays to lower long loop current requirements 3 Any HVAC control that requires more than 1A of continuous current at 24 Vac must be separated from the W180A Controller output with an isolating relay 4 HVAC units must have low voltage controls Forced air zoning requires tree structure where each zone has individual damper valve for control 5 Requires separate transformer N...

Страница 22: ...80A to the terminal Connect the W180A analog input wire to the sensor terminal AOBD Honeywell Trol A Temp Rectangular Dampers Where required 9 Requires transformer separate from the W180A Controller transformer Five damper actuators max per 40 VA transformer 10 Use a modified 3 wire daisy chain wiring technique to simplify wiring or use five wires and wire as home runs D635B G Zone Dampers Where r...

Страница 23: ...T TYPICAL RELAY CONNECTIONS 1 USE 24 VAC POWER SUPPLIED BY COMBINATION UNIT 2 ACTUAL HEAT PUMP TERMINAL LABELING NAMING WILL VARY 3 CONNECT COMPONENTS TO RELAYS ASSIGNED THROUGH SOFTWARE CONFIGURATION M7108 CONVENTIONAL FORCED AIR UNIT WIRING NOTES Fig 17 Typical hydronic system equipment wiring RLY 1 1 2 com RLY 2 spare A RLY 3 3 4 com RLY 4 spare B spare C RLY 5 5 6 com RLY 6 spare D RLY 7 7 8 c...

Страница 24: ... shows a typical schedule for a house A profile Can have different start times for different days of the week May be scheduled for only some days May not have a start time at all Complete the Homeowner Lifestyle Worksheet in Ap pendix B for the customer Use it when programming the System RLY 1 1 2 com RLY 2 spare A RLY 3 3 4 com RLY 4 spare B spare C RLY 5 5 6 com RLY 6 spare D RLY 7 7 8 com RLY 8...

Страница 25: ...s see example Homeowner Lifestyle Worksheet D i r e c t i o n s 1 Provide Zone Names up to 10 Profile Names up to 20 and Start Times 2 Indicate the desired heating and cooling setpoints 3 Identify with a 4 which zones are occupied for each profile W180 Zone Control System Preferred Temperature Setpoints Occupied Heating __________ Unoccupied Heating _________ Occupied Cooling __________ Unoccupied...

Страница 26: ...e studs as indicated in the job drawings and trace the outline of the keyholes on the studs 2 Start a 3 4 inch wood screw in each of the top keyholes 3 Hang the W180A Controller enclosure from the screws 4 Start a 3 4 inch wood screw in each of the remaining holes 5 Tighten all wood screws 6 Remove all appropriate knockouts and install bush ings obtained locally to protect the wires entering the e...

Страница 27: ...F spare G RLY 13 13 14 com RLY 14 spare H RLY 15 15 16 com RLY 16 RLY 17 17 18 com RLY 18 spare I RLY 19 19 20 com RLY 20 spare J spare K RLY 21 21 22 com RLY 22 spare L RLY 23 23 24 com RLY 24 20 VDC 5 VDC 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 POWER TO MAIN BOARD RS485 TOUCHPADS RELAY CONNECTIONS SENSOR INPUT CONNECTIONS sensor pwr sensor gnd RS232 POWER OF...

Страница 28: ...ad these instructions carefully Failure to follow them could damage the product or cause a hazardous condition 2 Check the ratings and description given on the prod uct to make sure the product is suitable for your application 3 Installer must comply with all local building codes and ordinances when installing this product 4 Installer must be a trained experienced service technician 5 The Touchpad...

Страница 29: ...l and power wires to the 6 wire connecting cable red wire for input power black wire for common green and yellow wires for signals using wire nuts See Fig 26 and 27 If more than three Touchpads are being wired to the W180A Controller see Fig 28 for auxiliary power wiring If required connect thewiringbetweenTotalHome SystemandW180 System Fig 29 Fig 25 Mounting S321A Touchpad in a 3 gang junction bo...

Страница 30: ...SSIS 5 DO NOT EXTEND YELLOW OR GREEN WIRES COMING FROM TOUCHPADS WITH A SINGLE WIRE ONLY CONNECT DATA LINES DIRECTLY AS SHOWN ABOVE JUMPER BLOCK Fig 28 Auxiliary power wiring for wiring more than three S321A Touchpads to the W180A Controller DATA END 12 VDC 12 VDC EXTERNAL int PLACE JUMPER TO CONNECT THE TWO LEFT HEADER PINS SIDE OPPOSITE INT LEAD LEAD 12 Vdc POWER SUPPLY USE POWER SUPPLY RATED AT...

Страница 31: ...0 com RLY 20 spare J spare K RLY 21 21 22 com RLY 22 spare L RLY 23 23 24 com RLY 24 20 VDC 5 VDC 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 POWER TO MAIN BOARD RS485 TOUCHPADS RELAY CONNECTIONS SENSOR INPUT CONNECTIONS sensor pwr sensor gnd RS232 POWER OFF ON A B C D E F Wire Termination Board copyright 1993 all rights reserved assy no xxx xxxx A ext M7214 W180A...

Страница 32: ...wall M3506 HOLE IN DRYWALL 6 WIRE CABLE PLASTIC SCREW ANCHORS 4 HIGH LIMIT CONTROLLER NOTES 1 Locate the high limit controller where it will be ex posed to average air temperature in the duct 2 Do not locate the high limit controller near hot pipes and cooling coils 3 To support the bulb in the duct use Bulb Holder No 107324A supplied with the adjustable differen tial model order separately for th...

Страница 33: ...2 After installation is complete check out the opera tion as provided in these instructions 198212CA OUTDOOR TEMPERATURE SENSOR NOTES 1 Locate the sensor where it will not be subject to tampering 2 Locate the sensor away from exhausts and direct sunlight that may affect the temperature reading A typical location would be under the roof overhang on the least sunny side of the building 3 Use a 10732...

Страница 34: ...oller is 300 ft 91m or less 4 Make sure there is good air circulation at average temperature at the location Avoid the following locations because they can introduce errors in tem perature sensor measurements Fig 36 a Hot areas caused by 1 Concealed pipes or ducts 2 Drafts from fireplaces or other heat sources 3 Convection or radiant heat from the sun or electrical equipment b Cold areas caused by...

Страница 35: ...s good air circulation at average temperature at the location Avoid the following locations because they can introduce errors in tem perature sensor measurements a Hot areas caused by 1 Concealed pipes or ducts 2 Drafts from fireplaces or other heat sources 3 Convection or radiant heat from the sun or electrical equipment 4 Outside walls b Cold areas caused by 1 Concealed pipes or ducts 2 Drafts f...

Страница 36: ...he sun Install and wire T7660A T7660B Space Temperature Sensors as follows 1 Mount the space sensor mounting plate on a wall mullion 1 7 8 in 48 mm wide minimum or electrical box Fig 39 and Table 10 TABLE 10 MOUNTING ACCESSORIES Type of Mounting 230514 Adapter Plate 230515 16 Finish Plate 230517 Black Mounting Ring Direct to wall 2 x 4 inch electrical box X X 2 x 4 inch electrical box with 230518 ...

Страница 37: ...JUMPER W1 M8162 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 SENSOR INPUT CONNECTIONS M8174 18 22 AWG TWISTED PAIR HONEYWELL T7660A SENSOR MAXIMUM DISTANCE FROM CONTROLLER IS 300 FT 91 M USING 18 AWG THERMOSTAT WIRE T A SENSOR GND CABLE SHIELD IF REQUIRED T7660A SENSOR Fig 42 Typical T7660B Space Temperature Sensor wiring 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 SENSOR INPUT CONNECTIONS M8175 22 AWG SENSOR GND SENSOR P...

Страница 38: ...t to make sure the product is suitable for the application 2 Locate the sensor a Where there is a minimum of 500 ft min airflow b Locate the sensor where it is exposed to freely circulating air but protected from rain and direct sunlight c Locate the sensor away from traffic areas on an inside wall at least 3 ft 1m from an outside wall and 54 in 1 4m from the floor Mount and install the C7600C Sol...

Страница 39: ...ing to pre vent electrical shock or equipment damage NOTES 1 All wiring must comply with local electrical codes ordinances and regulations 2 The voltage and frequency of the transformer used with the ML6161 must correspond to the characteris tics of the power supply and motor Fig 46 Damper clearance AIR FLOW ALLOW MINIMUM 5 1 2 in 14 cm CLEARANCE FOR ACTUATOR REMOVAL M8161 Fig 47 ML6161 typical wi...

Страница 40: ...duct at the location selected Ensure the opening is cut fully to the top and bottom air duct seams Fig 49 2 Slide the AOBD into the air duct Ensure the electric actuator is mounted toward the top of the air duct 3 For small air duct sizes smaller than 20 x 8 18 x 10 16 x 12 secure the AOBD mounting plate to the air duct with sheet metal screws provided 4 For large air duct sizes 20 in x 8 in 18 in...

Страница 41: ...OBD BM DAMPERS Install AOBD BM dampers as follows 1 Cut a 3 in 76 mm opening in the bottom or top of the air duct at the location selected Ensure the opening is cut fully to the air duct seams on each side Fig 51 2 Slide the AOBD BM into the air duct 3 Secure the AOBD BM mounting plate to the air duct using the sheet metal screws provided 4 Wire the AOBD BM as shown on the job drawings Fig 50 Secu...

Страница 42: ...el device operates within the specifications stated in the literature for the device 5 Verify that each piece of HVAC equipment operates properly as follows a Dampers and fans 1 Disabletheheating coolingequipmentandman ually turn On the fans Verify fan operation 2 Set the System Mode to Auto and use the override function to change the setpoint in each zone one at a time a Verify that the damper op...

Страница 43: ...ws 1 Disconnect the devices from the W180A Controller 2 Apply 24 volts across the appropriate common cw clockwise terminals verify that the damper opened It takes 90 seconds for the damper to run a full cycle If the damper opened go to step 3 otherwise go to step 4 3 Apply 24 volts across the appropriate common ccw counterclockwise terminals verifythatthedamperclosed If the damper opened this proc...

Страница 44: ...ER IS OPEN WHEN THE CRANK ARM POINTS TOWARD THE DAMPER THE DAMPER IS CLOSED WHEN THE CRANK ARM POINTS AWAY FROM THE DAMPER 1 1 REMOVE ACTUATOR COVER TO VIEW CRANK ARM POSITION 1 CW CCW SET SCREWS 2 SLOT DAMPER IS FULLY OPEN WHEN SET SCREWS ARE IN CW POSITION DAMPER IS FULLY CLOSED WHEN SET SCREWS ARE IN CCW POSITION 2 2 3 3 D635 HONEYWELL TROL A TEMP AOBD ...

Страница 45: ...e the zone temperature 3 Set the zone setpoint from step 2 to 10 degrees F 6 degrees C below the zone temperature The cooling equipment and fan should start fol lowing the expiration of the switchover time or minimum off time Visually verify that the damper s for the se lected zone open fully 4 Set one of the remaining zone setpoints to 10 de grees F 6 degrees C below the zone temperature The zone...

Страница 46: ...ust the contrast setting See the S321A Touchpad Specification form 63 0104 for more information 3 Replace the S321A Touchpad and reset the system Keys do not work 1 Verify that the W180A Controller is operating LED is flashing once per second 2 Verify the connection and the wiring between the S321A Touchpad and W180A Controller 3 Replace the S321A Touchpad and reset the system Incorrect displays s...

Страница 47: ...fy that the relay output is configured properly 4 Verify that the relay cards are seated properly 5 Verify that there are no obstructions at the valve 6 Replace the valve Problem Solution No airflow when damper should be open or air flow when the damper is closed 1 Verify that the damper is open closed as required NOTE The D635 damper is bidirectional and takes 90 seconds to fully open or close AO...

Страница 48: ... for cool the Outside Temperature for Use of Alt Equipment setting Overrun Activates the equipment when the stage is in the fan Overrun mode d Used for Stages 1 2 or 3 This specifies the equipment function for each stage of heating or cooling 6 For each stage enter the Stage attributes a Emergency Heat If checked all heating equip ment defined in this stage will be used during manual system overri...

Страница 49: ... Default 1 0 Recommended values Electric 1 5 Forced Air 1 2 Heat Pump 1 0 Hydronic Radiant 0 8 b Cooling For cooling equipment A value greater than 1 increases the equipment cycle rate a value less than 1 decreases the equipment cycle rate Min 0 0 Max 1 5 Default 1 0 Recommended values Cooling Compressor 1 0 HOMEOWNER LIFESTYLE WORKSHEET Prior to filling out this form verify that for each of the H...

Страница 50: ...68 0139 50 W180 ZONE CONTROL SYSTEM ...

Страница 51: ... for each profile Zone 1 Zone 2 Zone 3 Zone 4 Zone 5 Zone 6 Zone 7 Zone 8 Zone 9 Zone 10 Profile Start Days No Name Time 1 2 3 4 5 6 7 8 9 10 Example 1 Wake 5 30 AM M F Living Room Kitchen Dining Den Master Bath Master Bath Kid s Room Guest Room Study Rec Room 7 00 AM Sat Sun 69 74 Setpoints can be different than preferred setpoints see example Form 71 9303 9 93 Preferred Temperature Setpoints Occ...

Страница 52: ...n straight smooth ducts and thus cause pressure loss To simplify calculations these friction losses are measured as equivalent lengths of straight smooth ducts Fan characteristics Blade efficiency fan speed and fan horsepower all affect the amount of pressure that can be supported Dampers When a damper with seals closes the total pressure downstream matches the atmospheric pres sure and the total ...

Страница 53: ...254 mm and 16 x 12 in 406 x 305 mm unless they can be secured from both sides of the duct When an internally mounted motorized damper is used install it just upstream from a register or install the damper just ahead of a right angle to allow access for motor service Motorized dampers are usually installed close to the heating and cooling equipment They can be installed in a divided plenum on a two...

Страница 54: ...the graph to determine pressure drop in psi kPa 2 Pressure drop in equivalent ft m of pipe NOTE Both 1 2 and 3 4 in pipe conversion scales are available for this determination a Locate the flow rate at the bottom of graph b Draw a line vertically to top of the graph Determine pressure drop for either 1 2 or 3 4 in pipe 3 Pressure drop in ft of water kPa a Locate the flow rate at the bottom of grap...

Страница 55: ...4A GAL MIN l s FLOW RATE FT OF WATER psi kPa PRESSURE DROP PRESSURE DROP psi kPa 2 5CV 2 1 KV Fig 57 Flow characteristics of 3 5 Cv 3 0 kV valve PRESSURE DROP EQUIVALENT FEET OF PIPE EQUIVALENT METERS OF PIPE 12 3 6 11 3 4 12 5 3 8 8 0 2 4 9 0 2 7 10 3 80 24 3 45 13 7 70 21 3 65 20 60 18 50 149 40 119 30 89 5 20 60 3 4 IN PIPE 1 2 IN PIPE 50 0 345 10 0 69 5 0 34 1 0 7 0 50 3 4 0 10 0 69 0 05 0 34 ...

Страница 56: ... 0 0 2 0 13 4 0 25 6 0 38 8 0 5 10 0 63 12 0 76 14 0 88 16 1 0 18 1 1 20 1 3 22 1 4 24 1 5 26 1 6 28 1 8 30 1 9 0 05 0 15 1 0 3 5 1 5 1 3 5 15 10 30 M9185A GAL MIN l s FLOW RATE FT OF WATER psi kPa PRESSURE DROP psi kPa 7CV 6 0 KV Fig 60 Flow characteristics of 8 Cv 6 9 kV valve PRESSURE DROP EQUIVALENT FEET OF PIPE EQUIVALENT METERS OF PIPE 2 0 0 6 2 5 0 8 1 5 0 5 19 5 8 17 5 2 18 5 5 15 4 6 16 4...

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