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Installation, Operation, and

Start-Up Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . . 2

GENERAL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-64

Service Area Requirements

. . . . . . . . . . . . . . . . . . . 2

Remote Control Box Option

. . . . . . . . . . . . . . . . . . 2

• REMOTE CONTROL BOX CONDENSATE

PREVENTION

Make Electrical Connections

. . . . . . . . . . . . . . . . . . 3

Variable Frequency Drives

. . . . . . . . . . . . . . . . . . . 38

Water Valve Assemblies

. . . . . . . . . . . . . . . . . . . . . 38

• VALVE WIRING

Duct Static Pressure Probe (VAV Units)

. . . . . . 39

Space Temperature Sensor

. . . . . . . . . . . . . . . . . . 40

Outdoor-Air Temperature Sensor

. . . . . . . . . . . . . 42

Mixed-Air Temperature Sensor

. . . . . . . . . . . . . . . 42

Enthalpy Switch

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

• CONTROL RANGES

Supply-Air Temperature Sensor

. . . . . . . . . . . . . . 44

Return-Air Temperature Sensor

. . . . . . . . . . . . . . 44

Heat Interlock Relay

. . . . . . . . . . . . . . . . . . . . . . . . . 45

Fan Relay

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Duct High Humidity Switch

. . . . . . . . . . . . . . . . . . 45

Wall-Mounted Relative Humidity Sensor

. . . . . . 46

Duct-Mounted Relative Humidity Sensor

. . . . . . 47

• LOCATION FOR OUTSIDE AIR RELATIVE

HUMIDITY

• LOCATION FOR RETURN AIR RELATIVE

HUMIDITY

Mixing Box Linkage

. . . . . . . . . . . . . . . . . . . . . . . . . 47

Airflow Switch

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Low-Temperature Thermostat

. . . . . . . . . . . . . . . . 48

Outdoor-Air Thermostat

. . . . . . . . . . . . . . . . . . . . . 48

Filter Status Switch

. . . . . . . . . . . . . . . . . . . . . . . . . 49

High-Pressure Switch

. . . . . . . . . . . . . . . . . . . . . . . 49

Air Quality Sensors

. . . . . . . . . . . . . . . . . . . . . . . . . 49

Constant Outside Air (OAC) Control

. . . . . . . . . . 50

• PROBE INSTALLATION
• OAC CALIBRATION
• USING OAVP VALUES TO DETERMINE DUCT

AIRFLOW

• FIELD-SUPPLIED OR HIGH-VELOCITY

PRESSURE TRANSDUCERS

Field Wiring Connections

. . . . . . . . . . . . . . . . . . . . 52

• REMOTE LOCAL INTERFACE DEVICE (HSIO)
• RETURN-AIR TEMPERATURE SENSOR,

OUTDOOR-AIR TEMPERATURE SENSOR,
ENTHALPY SWITCH, AND MIXED-AIR
TEMPERATURE SENSOR

• SPACE TEMPERATURE SENSOR (SPT)
• DAMPER ACTUATORS
• SMOKE CONTROL OPTION
• ANALOG DEVICE FOR ANALOG OUTPUT

TEMPERATURE CONTROL

• DEVICE UNDER DISCRETE OUTPUT

TEMPERATURE CONTROL

• DISCRETE OUTPUT DEVICE UNDER

TIMECLOCK CONTROL

• HUMIDIFICATION DEVICES
• AIR QUALITY SENSOR
• OUTSIDE AIR VELOCITY PRESSURE (OAVP)

SENSOR

• FAN VOLUME CONTROL
• ELECTRIC HEATER
• CARRIER COMFORT NETWORK INTERFACE
• OUTDOOR-AIR THERMOSTAT

CONTROL SYSTEM

. . . . . . . . . . . . . . . . . . . . . . . 64-68

Processor (PSIO Master) and Option (PSIO Slave)

Modules

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Relay (DSIO) Module

. . . . . . . . . . . . . . . . . . . . . . . 65

Local Interface Device (HSIO)

. . . . . . . . . . . . . . . 67

CONTROL OPERATION

. . . . . . . . . . . . . . . . . . . 69-91

Accessing Functions and Subfunctions

. . . . . 69

Display Functions

. . . . . . . . . . . . . . . . . . . . . . . . . . 69

• SUMMARY DISPLAY
• STATUS FUNCTION
• HISTORY FUNCTION
• TEST FUNCTION

Programming Functions

. . . . . . . . . . . . . . . . . . . 81

• SERVICE FUNCTION
• SET POINT FUNCTION
• SCHEDULE FUNCTION

CONTROL OPERATING SEQUENCE

. . . . . . . 92-102

Constant Volume and Variable Air

Volume Units

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Constant Volume Units Only

. . . . . . . . . . . . . . . . 96

Variable Air Volume Units Only

. . . . . . . . . . . . . 99

START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103-108

Initial Check

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Quick Test

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Electronic Valve Actuator Field Test

. . . . . . . . 108

CONTROL LOOP CHECKOUT

. . . . . . . . . . . . 108,109

To Check Operation of Analog Outputs

. . . . . 108

VALVE TROUBLESHOOTING

. . . . . . . . . . . . . 109-111

General

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

All

⁄

-in. Through 1

⁄

-in. Electric Hot Water/Steam

Valve Assemblies

. . . . . . . . . . . . . . . . . . . . . . . 109

All 1

⁄

-in. Through 3-in. Valve Assemblies

. . 110

CONTROL MODULE

TROUBLESHOOTING

. . . . . . . . . . . . . . . . . . 111,112

General

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Module Replacement (PSIO, DSIO)

. . . . . . . . . 112

UNIT TROUBLESHOOTING

. . . . . . . . . . . . . . . 113-115

METRIC CONVERSION CHART

. . . . . . . . . . . . . 116

39L,NX

Central Station Air-Handling Units

With Product Integrated Controls (PIC)

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 3
Tab

PC 201

Catalog No. 533-913

Printed in U.S.A.

Form 39L,NX-2SI

Pg 1

3-96

Replaces: 39L,NX-1SI

Содержание 39L Series

Страница 1: ...TEMPERATURE CONTROL DEVICE UNDER DISCRETE OUTPUT TEMPERATURE CONTROL DISCRETE OUTPUT DEVICE UNDER TIMECLOCK CONTROL HUMIDIFICATION DEVICES AIR QUALITY SENSOR OUTSIDE AIR VELOCITY PRESSURE OAVP SENSOR...

Страница 2: ...the control box PIC environmental limitations are as follows Shipping Temperature 20 to 165 F Shipping Humidity 10 to 95 Operating Temperature 32 to 125 F Operating Humidity 30 to 90 INSTALLATION Fol...

Страница 3: ...stallation and power circuit requirements Do not run PIC power wiring in the same conduit as sensor wiring or control wiring of field installed devices IMPORTANT To ease installation control wiring is...

Страница 4: ...lume IGV Inlet Guide Vanes FC Forward Curved FMB Filter Mixing Box MXB Mixing Box PIC Product Integrated Controls VAV Variable Air Volume The cv capacity rating is the flow gpm through a valve at 1 ps...

Страница 5: ...C Forward Curved FMB Filter Mixing Box MXB Mixing Box N C Normally Closed N O Normally Open PIC Product Integrated Controls VAV Variable Air Volume The cv capacity rating is the flow gpm through a val...

Страница 6: ...NOTE Dimensions in are in millimeters Fig 3 Control Box for Remote Mounting Fig 4 Sealing Control Wiring in Flexible Conduit 6...

Страница 7: ...ocessor Module PURG Smoke Purge Input RAD Return Air Damper Actuator RAT Return Air Temperature RFAN Return Fan RFR Return Fan Relay RFVC Return Fan Volume Control RH Relative Humidity RVP Return Velo...

Страница 8: ...ARRANGEMENT FOR SIZES 03 AND 06 ARRANGEMENT FOR SIZES 08 THROUGH 35 Fig 5 PIC Section Control Box Component Arrangements 39L 8...

Страница 9: ...Fig 6 PIC Section Control Box Component Arrangement 39NX Sizes 07 21 9...

Страница 10: ...Fig 7 PIC Section Control Box Component Arrangement 39NX Sizes 26 92 10...

Страница 11: ...Fig 8 Fan Motor Starter Circuit and PIC Control Wiring Interface PIC Power for Control Circuit From Dedicated Source 11...

Страница 12: ...tch AI Analog Input AO Analog Output AOTC Analog Output Temperature Control AQ1 2 Air Quality Sensors 1 2 CUST Condensing Unit Status Outdoor Air Thermostat CWC Chilled Water Coil DI Discrete Input DH...

Страница 13: ...Fig 9 Unit Wiring Schematic 39L Sizes 03 35 115 v Typical 13...

Страница 14: ...Fig 9 Unit Wiring Schematic 39L Sizes 03 35 115 v Typical cont 14...

Страница 15: ...Fig 9 Unit Wiring Schematic 39L Sizes 03 35 115 v Typical cont 15...

Страница 16: ...Fig 9 Unit Wiring Schematic 39L Sizes 03 35 115 v Typical cont 16...

Страница 17: ...Fig 9 Unit Wiring Schematic 39L Sizes 03 35 115 v Typical cont 17...

Страница 18: ...Fig 9 Unit Wiring Schematic 39L Sizes 03 35 115 v Typical cont 18...

Страница 19: ...Fig 10 Unit Wiring Schematic 39NX Sizes 07 21 115 v Typical 19...

Страница 20: ...Fig 10 Unit Wiring Schematic 39NX Sizes 07 21 115 v Typical cont 20...

Страница 21: ...Fig 10 Unit Wiring Schematic 39NX Sizes 07 21 115 v Typical cont 21...

Страница 22: ...Fig 10 Unit Wiring Schematic 39NX Sizes 07 21 115 v Typical cont 22...

Страница 23: ...Fig 10 Unit Wiring Schematic 39NX Sizes 07 21 115 v Typical cont 23...

Страница 24: ...Fig 10 Unit Wiring Schematic 39NX Sizes 07 21 115 v Typical cont 24...

Страница 25: ...Fig 11 Unit Wiring Schematic 39NX Sizes 26 92 115 v Typical 25...

Страница 26: ...Fig 11 Unit Wiring Schematic 39NX Sizes 26 92 115 v Typical cont 26...

Страница 27: ...Fig 11 Unit Wiring Schematic 39NX Sizes 26 92 115 v Typical cont 27...

Страница 28: ...Fig 11 Unit Wiring Schematic 39NX Sizes 26 92 115 v Typical cont 28...

Страница 29: ...Fig 11 Unit Wiring Schematic 39NX Sizes 26 92 115 v Typical cont 29...

Страница 30: ...Fig 11 Unit Wiring Schematic 39NX Sizes 26 92 115 v Typical cont 30...

Страница 31: ...Fig 12 Unit Wiring Schematic 39L and 39NX PIC with Remote Control Box 31...

Страница 32: ...Fig 12 Unit Wiring Schematic 39L and 39NX PIC with Remote Control Box cont 32...

Страница 33: ...Fig 12 Unit Wiring Schematic 39L and 39NX PIC with Remote Control Box cont 33...

Страница 34: ...Fig 12 Unit Wiring Schematic 39L and 39NX PIC with Remote Control Box cont 34...

Страница 35: ...Fig 12 Unit Wiring Schematic 39L and 39NX PIC with Remote Control Box cont 35...

Страница 36: ...Fig 12 Unit Wiring Schematic 39L and 39NX PIC with Remote Control Box cont 36...

Страница 37: ...K 17 TB2 28 EXD WHT 18 TB2 8 EXD GRN 19 TB2 7 EXD RED 20 TB2 15 SFAN1 BLK 21 TB2 16 SFAN1 WHT 22 MPSIO 38 SFAN1 GRN 23 MPSIO 37 SFAN1 RED 24 TB2 17 SFAN2 BLK 25 TB2 18 SFAN2 WHT 26 TB2 23 RFAN1 BLK 27...

Страница 38: ...r stroke if power is lost a return spring reverses the stroke and returns the valve stem to the normal position To prevent electric shock and equipment damage dis connect the power to the control box...

Страница 39: ...ectors connect the RED 1 and GREEN leads inside the actuator junction box to the other 2 wires in the cable Note the polarity of each wire 3 Connect the positive signal wire connected to the RED lead...

Страница 40: ...s follows 1 Remove sensor cover Using a small blade screwdriver insert blade into sensor cover latch slot on bottom of slat Gently push upward on the screwdriver to release the cover latch Rotate the...

Страница 41: ...13 4 96 2382 5 148 984 7 200 86 121 6 7 21 233 5 45 6 475 2 97 2339 5 149 969 2 201 83 638 4 6 20 715 7 46 6 340 3 98 2297 5 150 954 0 202 81 234 8 5 20 212 2 47 6 208 5 99 2256 3 151 939 1 203 78 908...

Страница 42: ...ance vs Temperature Values for Outdoor Air Temperature Sensor RESISTANCE Ohms TEMPERATURE F RESISTANCE Ohms TEMPERATURE F 168 250 40 5 000 0 77 121 350 31 4 028 5 86 88 500 22 3 265 0 95 65 200 13 2 6...

Страница 43: ...The enthalpy switch and mounting template are located in a box shipped inside the fan section The enthalpy switch is normally mounted in a horizontal position with the sensing element exposed to freel...

Страница 44: ...4 Remove the adhesive backing from the gasket attach the gasket to the outside of the junction box aligning the holes in the gasket with the holes in the box 5 Attach the junction box to the duct wit...

Страница 45: ...ides settings from 15 to 95 humidity Locate the DHH control element in the duct downstream of the humidifier Adjust the DHH to the ASHRAE American Society of Heating Refrigeration and Air Con ditionin...

Страница 46: ...erratic sensor readings Sensor should be vertically mounted approximately 5 ft up from the floor beside the space temperature sensor Install the sensor using 2 screws and 2 hollow wall an chors if re...

Страница 47: ...osition mounting template on duct 2 Drill four 1 8 in mounting holes as indicated on the template 3 Punch a 11 8 in hole as indicated on the mounting template 4 Mount sensor to duct using four no 8 sc...

Страница 48: ...stat below 35 F Damage to freezestat may result If the temperature exceeds the set point by 5 F or more the reset button will restore the circuit Outdoor Air Thermostat Fig 37 Also called the condensi...

Страница 49: ...se infrared technology to de tect the levels of CO2 present in the air Sensor descriptions and part numbers are shown in Table 6 To mount the sensor refer to the installation in structions shipped wit...

Страница 50: ...locity pressure the rear tube measures duct static pressure Use approved plenum tubing to connect the probe to the bulkhead fittings on top of the control box For runs up to 150 ft use 1 4 in OD tubin...

Страница 51: ...he duct in sq ft A To determine the airflow F in the duct in cfm V x A F If the airflow obtained by the preceding method is differ ent from the design airflow or a measurement obtained with a balancer...

Страница 52: ...NSOR ENTHALPY SWITCH AND MIXED AIR TEMPERATURE SENSOR Wires are to be connected to the proper terminals on the processor mod ule See Fig 44 for details Select a 20 AWG twisted pair no shield cable Con...

Страница 53: ...Fig 47 1 Select a 20 AWG twisted pair conductor cable rated for the application Identify the positive 1 and negative signal contacts on the actuator 2 Install cable from the actuator to the PIC contr...

Страница 54: ...NTROL OPTION The smoke control option includes 3 relays which control the 4 different modes of the option These relays are factory wired Terminal block 5 TB5 provides an easy means to wire the field s...

Страница 55: ...n See wiring diagrams in Fig 9 and 12 for terminal connections in 39L control box and all remote mount control boxes Field installed if only outside air damper is used Fig 47 Field Supplied Mixing Box...

Страница 56: ...stat OAD Outside Air Damper Actuator PRES Pressurization RAD Return Air Damper Actuator RFR Return Fan Relay SF Supply Fan Contactor SFR Supply Fan Relay TB Terminal Block TRAN Transformer Remove Jump...

Страница 57: ...Damper Actuator PRES Pressurization RAD Return Air Damper Actuator RFR Return Fan Relay SF Supply Fan Contactor SFR Supply Fan Relay TB Terminal Block TRAN Transformer Factory Wiring Field Wiring Fac...

Страница 58: ...ted cable connect the relay coil con tacts 1 and 2 to the option module pins 50 and 51 Connect the device to be controlled to the normally open or normally closed contacts of the relay Pay close atten...

Страница 59: ...age 2 valve Duct High Humidity Switch The humidistat is factory sup plied and field installed It is shipped with a template in its own box All wiring must comply with applicable local codes and ordina...

Страница 60: ...ty Transmitter Connect the posi tive 1 wire to pin 31 of the processor module Connect the negative wire to pin 32 of the processor module Return Air or Space Relative Humidity Transmitter Connect the...

Страница 61: ...ing Fig 59 Duct Mounted Relative Humidity Transmitter Wiring Fig 60 Wall Mounted Relative Humidity Transmitter Wiring LEGEND RH Relative Humidity Field Wiring Fig 61 Wiring of Relative Humidity Transm...

Страница 62: ...rs As a general rule size transducers so that the maximum air velocity pressure is 75 of the transducer s maximum value For example if the 39L or 39NX unit produces a maximum air velocity pressure of...

Страница 63: ...and all remote mount control boxes Fig 64 Fan Volume Control Differential Pressure Transducer P N HK05ZG007 Factory Wiring NOTE Connections for 39NX with integral PIC shown See wiring diagrams in Fig...

Страница 64: ...to a sys tem element a color code system for the entire network is recommended to simplify installation and checkout The fol lowing color code is recommended SIGNAL TYPE CCN BUS CONDUCTOR INSULATION...

Страница 65: ...sed The unit application de termines the terminal connections Refer to the unit wiring diagram for terminal numbers The PSIO address switches are factory set at address 01 master and 31 slave Use a lo...

Страница 66: ...r Handling Unit CUST Condensing Unit Status DSIO Relay Module DX Direct Expansion OAT Outdoor Air Thermostat PIC Product Integrated Control Factory Wiring Field Wiring Fig 70 Outdoor Air Thermostat DS...

Страница 67: ...ting information about the machine Quick Test Check inputs and outputs for proper operation History Check latest service dates and alarms in order of occurrence Service Enter specific unit configurati...

Страница 68: ...hedule 1 Cooling coil configuration 8 Period 7 of schedule 1 DX cooling configuration 9 Period 8 of schedule 1 Inlet guide vanes configuration 10 Occupied mode override sched 2 Mixed air damper config...

Страница 69: ...the function name key The display shows the subfunction group SETPOINT System set points To move to the other elements scroll up or down using the arrow keys OHSP X Occupied heating set point OCSP X...

Страница 70: ...ALARM X 25th alarm ALARM X 26th alarm ALARM X 27th alarm ALARM X 28th alarm ALARM X 29th alarm ALARM X 30th alarm ALARM X 31st alarm ALARM X 32nd alarm STATUS Keyboard Entry Display Description MODES...

Страница 71: ...DX Direct Expansion STATUS Keyboard Entry Display Description IGV X Inlet guide vanes forced x forced value MIXD X Mixed air damper MIXD X Mixed air damper forced x forced value HCV X Heating coil val...

Страница 72: ...ription LOG ON Enter password to log on LOGGEDON Log on okay When finished with configuration log off as follows LOGGEDON Shows that configurations are available LOG OFF LOGD OFF Log off okay configur...

Страница 73: ...isplay Description MIXADMPR Configuration of mixed air damper MPG X Master proportional gain MIG X Master integral gain MDG X Master derivative gain SMG X Submaster gain SCV X Submaster center value M...

Страница 74: ...gain MDG X Master derivative gain SMG X Submaster gain SCV X Submaster center value SMR X Submaster reference value SMR X Submaster reference value forced ALRMLIMT Configuration of alarm limits SPLO X...

Страница 75: ...temperature control set point DOSP X Discrete temperature control set point Q1SP X Air quality 1 set point Q2SP X Air quality 2 set point OVSP X Outside air velocity pressure set point DEMAND Demand l...

Страница 76: ...Description OUTPUTS Factory field test of outputs HCV X Entering heating coil valve test HCV TEST Testing heating coil valve CCV X Entering cooling coil valve test CCV TEST Testing cooling coil valve...

Страница 77: ...ling DXS1 X Stage 1 test STG1TEST Testing DX cooling stage 1 DXS2 X Stage 2 test STG2TEST Testing DX cooling stage 2 DXS 3 X Stage 3 test STG3TEST Testing DX cooling stage 3 DXS4 X Stage 4 test STG4TE...

Страница 78: ...mperature VAV units only Unit must be configured for space temperature reset This mode is enabled by Demand Limit 22 On CV constant volume units this mode indicates that the fan is being held off by t...

Страница 79: ...ES Display Description 1 Fire mode force 2 Internal safety force 3 Quick Test Service tool force 4 HSIO Building Supervisor force 5 Remote Building Supervisor force 6 Loadshed minimum offtime force 7...

Страница 80: ...t Value KEYBOARD ENTRY DISPLAY RESPONSE COMMENTS INPUTS System inputs Scroll past SPT X Space temperature SAT X Supply air temperature RT X Return air temperature MAT X Mixed air temperature OAT 60 Ou...

Страница 81: ...start the test procedure Example 5 Using Quick Test KEYBOARD ENTRY DISPLAY RESPONSE COMMENTS ELEC HT Factory test of electric heat subfunction of test function EHS1 Stage 1 test STG1 TST Pressing ENTR...

Страница 82: ...Enabled Disabled Enabled DX Cooling Stage 2 Time Guard 0 disabled 1 enabled Enabled Disabled Enabled DX Cooling Stage 3 Time Guard 0 disabled 1 enabled Enabled Disabled Enabled DX Cooling Stage 4 Time...

Страница 83: ...Occupied F 10 to 245 65 Space Temperature High Alarm Limit Occupied F 10 to 245 80 Space Temperature Low Alarm Limit Unoccupied F 10 to 245 45 Space Temperature High Alarm Limit Unoccupied F 10 to 245...

Страница 84: ...ment address changed to 2 PSW XXXX Password Used to change the HSIO display of the measure ments from English to Metric See Example 8 Used to read or change factory configuration of user options See E...

Страница 85: ...guide vanes Used to read or change configuration of mixed air dampers Used to read or change configuration of elec tric heater Used to read or change factory configura tion of Nighttime Free Cooling...

Страница 86: ...Limits KEYBOARD ENTRY DISPLAY RESPONSE COMMENTS ALRMLIMT Alarm limit field configuration of subfunction of service function SPLO 65 Scroll past space temperature low limit occupied mode SPHO 80 Scroll...

Страница 87: ...t 6 30 am 4 19 00 The unit was last stopped on Thursday at 7 00 pm Example 18 Service Maintenance Alarm Configuration KEYBOARD ENTRY DISPLAY RESPONSE COMMENTS SRV MTN Service Maintenance alarm configu...

Страница 88: ...the colon when entering the time and date See Example 21 Reading and Changing Daylight Savings Time Example 22 shows how to read and change daylight savings time The month is entered as a number 1 Ja...

Страница 89: ...od is to extend past midnight it must be programmed in the following manner Occupied period must end at 24 00 hours midnight a new occupied period must be programmed to begin at 00 00 hours on the nex...

Страница 90: ...sing the Schedule Function cont KEYBOARD ENTRY DISPLAY RESPONSE COMMENT PROGRAMMING PERIOD 2 For this example period 2 is used on Monday and Tuesday PERIOD 2 Define scheduling period 2 OCC 00 00 Start...

Страница 91: ...0 00 UNO 00 00 NOTE When a day is flagged yes for 2 overlapping periods occu pied time will take precedence over unoccupied time Occupied times can overlap in the schedule with no consequence To exten...

Страница 92: ...ns OFF The unit must have mixed air dampers to operate NTFC NTFC is scheduled to run only between the hours of 3 00 am and 7 00 am NIGHT PURGE During the unoccupied period this fea ture starts the fan...

Страница 93: ...f day is equal to or within the Unoccupied time period the discrete output is turned OFF HUMIDITY ANALOG OUTPUT CONTROL The hu midity analog output control adjusts the steam valve of the steam grid hu...

Страница 94: ...the AQ1 sensor input and compares it to the config ured set point The control then calculates the minimum damper position to maintain the set point If no other control is at tempting to adjust the da...

Страница 95: ...sor IAQ Indoor Air Quality MAT Mixed Air Temperature OAT Outdoor Air Temperature RH Relative Humidity SAT Supply Air Temperature SPT Space Temperature VAV Variable Air Volume Fig 76 Indoor Air Quality...

Страница 96: ...art is used to heat up or cool down the space prior to occupancy The pur pose is to have the space temperature approach and then achieve the occupied set point by time of occupancy The control uses ou...

Страница 97: ...LEGEND CCV Cooling Coil Valve CV Constant Volume DX Direct Expansion RAT Return Air Temperature RH Relative Humidity Fig 77 Cooling DX and Chilled Water Control Operation 97...

Страница 98: ...LEGEND DX Direct Expansion MAT Mixed Air Temperature RAT Return Air Temperature SAT Supply Air Temperature Fig 78 DX Submaster Gain Control Operation 98...

Страница 99: ...ling below the desired set point The number of heat stages is factory set for each unit s heater If the supply fan is OFF all stages of electric heat are turned off If the fan is ON the control reads...

Страница 100: ...ystem The return fan IGVs or inverters are modulated to maintain a constant differential cfm value between the supply and return fans in the system If the supply fan is OFF the return fan inlet guide...

Страница 101: ...LEGEND OA Outside Air OAC Constant Outside Air OAVP Outside Air Velocity Pressure VAV Variable Air Volume Fig 79 Constant Outside Air OAC Control Operation 101...

Страница 102: ...remaining in Loadshed if the control loses communications with the Loadshed option If the timer expires before the loadshed command is cleared by the Loadshed option the control clears the loadshed c...

Страница 103: ...0 Present occupied cooling set point is 78 0 OCSP 70 0 Key in 70 and press ENTR display shows new occupied cooling set point is 70 Unit is shipped with the NTFC Demand Limit Tem perature Reset Optima...

Страница 104: ...ed with the local weather bureau FLTS NRM Verify that the filter status reads Normal Listed below are steps which must be used to verify the inputs to the Option Module If the unit is not equipped wit...

Страница 105: ...measuring power OAVP 0 00 Verify that the velocity pressure reads 0 00 in wg with the fan OFF and the mixed air damper closed 0 setting AQ1 XXX Verify the displayed value using field supplied instrume...

Страница 106: ...ion Module proceed with the Option Output portion of the test Table 20 If the unit does not have an Option Module proceed to the electric heater portion of the test Table 21 If unit does not have an O...

Страница 107: ...tacts is greater than 1000 ohms DTCCTEST Using an ohmmeter verify that the reading across the DTCC Discrete Timeclock Control normally open relay contacts is less than 10 ohms Proceed with the testing...

Страница 108: ...em down A decrease in signal retracts the actuator shaft and lifts the valve stem up Valve construction determines normal valve flow either stem up open or stem up closed On 3 way mixing valves stem u...

Страница 109: ...100 SCV N O SCV N C 100 100 0 b Observe the operation of the controlled device for a few minutes If the device oscillates every few sec onds around the forced value then lower the SMG by small amount...

Страница 110: ...en end wrench may be applied on the flats provided on the actuator base The actuator may be rotated as desired to facilitate wiring connections All 11 2 in Through 3 in Valve Assemblies See Fig 82 To...

Страница 111: ...ooling Coil Valve Quick Test 2 Way Normally Closed KEYBOARD ENTRY DISPLAY RESPONSE COMMENTS OUTPUTS Entering factory test of outputs HCV Scroll past heating coil valve test by pressing key CCV Cooling...

Страница 112: ...al shock and equipment damage always disconnect all power to the control box be fore replacing PIC modules 2 Open the control box door 3 Refer to Fig 5 7 for control box component arrange ments Diseng...

Страница 113: ...eck transformer output Incorrect reading from space temperature sensor supply air temperature sensor or return air temperature sensor VAV units Check status of sensor readings for accuracy Replace sen...

Страница 114: ...check operation High Pressure Switch HPS is incorrectly set or defective Using squeeze bulb check trip point of HPS Adjust as re quired Check for plugged lines Replace if defective Static pressure sen...

Страница 115: ...that priority level is set at 1 or 2 and correct if necessary Level 3 provides no IAQ control only alarm functions Set point too high Adjust set point to correct lower level Air quality AQ sensors not...

Страница 116: ...tion Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Book 3 Tab 1b PC 201 Catalog No 533 913 Printed in...

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