Carrier 39L manual

Installation, Operation, and Start-Up Instructions CONTENTS Page SAFETY CONSIDERA TIONS ...................2 GENERAL ...................................2 INST ALLA TION ............................. 2-64 Service Area Requirements ...................2 Remote Control Box Option ..................2 • REMOTE CONTROL BOX CONDENSA TE PREVENTION Make El[...]

IMPOR T ANT : This equipment generates, uses, and can radiate radio frequency energy and if not installed and used in accordance with these instructions may cause radio interference. It has been tested and found to com- ply with the limits of a Class A computing device as defined by FCC regulations, Subpart J of Part 15, which are designed to prov[...]

Mount the remote control box as follows: 1. Loosen and remove the 4 nuts securing the control panel in the control box. 2. Remove the control panel from the box; set the panel and nuts aside for reassembly later . 3. Mount the control box to the Unistrut t support using field- supplied fasteners. 4. Locate, mark, and drill pilot holes on the top o[...]

LEGEND ABX — Air Blender AF — Airfoil CV — Constant V olume IGV — Inlet Guide V anes FC — Forward-Curved FMB — Filter Mixing Box MXB — Mixing Box PIC — Product Integrated Controls VAV — V ariable Air V olume *The cv capacity rating is the flow (gpm) through a valve at 1 psi pres- sure drop. Fig. 1 — Basic PIC Order Number 4[...]

LEGEND AF — Airfoil CV — Constant V olume DX — Direct Expansion FC — Forward-Curved FMB — Filter Mixing Box MXB — Mixing Box N.C. — Normally Closed N.O. — Normally Open PIC — Product Integrated Controls VAV — V ariable Air V olume *The cv capacity rating is the flow (gpm) through a valve at 1 psi pressure drop. Fig. 2 — PIC O[...]

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

LEGEND (Fig. 5-12, T able 2) AFS — Airflow Switch AO — Analog Output AOTC — Analog Output T emperature Control AQ 1 — Air Quality Sensor , No. 1 AQ 2 — Air Quality Sensor , No. 2 C— Contactor CCW — Counterclockwise CH — Channel CR — Control Relay CUST — Condensing Unit Status CV — Constant V olume CW — Clockwise CWV — Chi[...]

ARRANGEMENT FOR SIZES 03 AND 06 ARRANGEMENT FOR SIZES 08 THROUGH 35 Fig. 5 — PIC Section Control Box Component Arrangements, 39L 8[...]

Fig. 6 — PIC Section Control Box Component Arrangement, 39NX Sizes 07-21 9[...]

Fig. 7 — PIC Section Control Box Component Arrangement, 39NX Sizes 26-92 10[...]

Fig. 8 — Fan Motor Starter Circuit and PIC Control Wiring Interface — PIC Power for Control Circuit From Dedicated Source 11[...]

T able 1 — Input and Output Points MODULE, DEF AUL T ADDRESS INPUT INPUT TYPE CHANNEL NUMBER OUTPUT OUTPUT TYPE CHANNEL NUMBER PSIO (Processor) ADDRESS 1 SA T AI 1 IGV* AO 13 OA T AI 2 MIXD AO, DO† 14 MA T AI 3 HWC AO 15 RH AI 4 CWC AO 16 L TT DI 5 SF DO 17 SPT AI 6 HIR* DO 18 RA T AI 7 — — — SP* AI 8 — — — AFS DI 9 — — — FL T[...]

Fig. 9 — Unit Wiring Schematic, 39L Sizes 03-35 (1 15 v , T ypical) 13[...]

Fig. 9 — Unit Wiring Schematic, 39L Sizes 03-35 (1 15 v , T ypical) (cont) 14[...]

Fig. 9 — Unit Wiring Schematic, 39L Sizes 03-35 (1 15 v , T ypical) (cont) 15[...]

Fig. 9 — Unit Wiring Schematic, 39L Sizes 03-35 (1 15 v , T ypical) (cont) 16[...]

Fig. 9 — Unit Wiring Schematic, 39L Sizes 03-35 (1 15 v , T ypical) (cont) 17[...]

Fig. 9 — Unit Wiring Schematic, 39L Sizes 03-35 (1 15 v , T ypical) (cont) 18[...]

Fig. 10 — Unit Wiring Schematic, 39NX Sizes 07-21 (1 15 v , T ypical) 19[...]

Fig. 10 — Unit Wiring Schematic, 39NX Sizes 07-21 (1 15 v , T ypical) (cont) 20[...]

Fig. 10 — Unit Wiring Schematic, 39NX Sizes 07-21 (1 15 v , T ypical) (cont) 21[...]

Fig. 10 — Unit Wiring Schematic, 39NX Sizes 07-21 (1 15 v , T ypical) (cont) 22[...]

Fig. 10 — Unit Wiring Schematic, 39NX Sizes 07-21 (1 15 v , T ypical) (cont) 23[...]

Fig. 10 — Unit Wiring Schematic, 39NX Sizes 07-21 (1 15 v , T ypical) (cont) 24[...]

Fig. 1 1 — Unit Wiring Schematic, 39NX Sizes 26-92 (1 15 v , T ypical) 25[...]

Fig. 1 1 — Unit Wiring Schematic, 39NX Sizes 26-92 (1 15 v , T ypical) (cont) 26[...]

Fig. 1 1 — Unit Wiring Schematic, 39NX Sizes 26-92 (1 15 v , T ypical) (cont) 27[...]

Fig. 1 1 — Unit Wiring Schematic, 39NX Sizes 26-92 (1 15 v , T ypical) (cont) 28[...]

Fig. 1 1 — Unit Wiring Schematic, 39NX Sizes 26-92 (1 15 v , T ypical) (cont) 29[...]

Fig. 1 1 — Unit Wiring Schematic, 39NX Sizes 26-92 (1 15 v , T ypical) (cont) 30[...]

Fig. 12 — Unit Wiring Schematic, 39L and 39NX PIC with Remote Control Box 31[...]

Fig. 12 — Unit Wiring Schematic, 39L and 39NX PIC with Remote Control Box (cont) 32[...]

Fig. 12 — Unit Wiring Schematic, 39L and 39NX PIC with Remote Control Box (cont) 33[...]

Fig. 12 — Unit Wiring Schematic, 39L and 39NX PIC with Remote Control Box (cont) 34[...]

Fig. 12 — Unit Wiring Schematic, 39L and 39NX PIC with Remote Control Box (cont) 35[...]

Fig. 12 — Unit Wiring Schematic, 39L and 39NX PIC with Remote Control Box (cont) 36[...]

T able 2 — Junction Box Connections for Optional Remote Control Box REMOTE CONTROL BOX LOCA TION CONTROL BOX TERMINAL F AN SECTION JUNCTION BOX SIGNAL JUNCTION BOX TERMINAL MPSIO 2 SA T — BLK 1 MPSIO 3 SA T — RED 2 MPSIO 8 MA T — BLK 3 MPSIO 9 MA T — RED 4 TB3 10 FL TS — BLK 5 MPSIO 28 FL TS — RED 6 TB3 10 L TT — K3 7 MPSIO 13 L TT [...]

V ariable-Frequency Drives — The input signal for the inverter must be 4 to 20 mA. Use a 2-conductor 20 A WG (American W ire Gage) cable (single twisted pair , unshielded) to connect the input of the inverter to the output of the PIC control terminals. See Fig. 8. W ire the inverter so that if it is placed in the manual or bypass mode the low tem[...]

V AL VE WIRING Valves MUST be connected to the correct processor mod- ule terminal to operate properly. Damage to the actuator may occur if the valve is improperly connected. Hot W ater V alves (Fig. 15) — Using a 4-conductor 20 A WG cable (two twisted pairs, no shield), connect the hot water valve actuator as follows: 1. Using twist-on wire conn[...]

Space T emperature Sensor (Fig. 18) — The space temperature sensor (SPT) is packaged and shipped inside the fan section. It is installed on a building interior wall to mea- sure room air temperature. The wall plate accommodates both the NEMA (National Electrical Manufacturers’ Association) standard and the European 1 ⁄ 4 DIN (Deutsche Industr[...]

T able 3 — Thermistor Resistance vs. T emperature V alues for Space T emperature Sensor , Return-Air T emperature Sensor , and Supply-Air T emperature Sensor RESIST ANCE (Ohms) TEMP (F) RESIST ANCE (Ohms) TEMP (F) RESIST ANCE (Ohms) TEMP (F) RESIST ANCE (Ohms) TEMP (F) RESIST ANCE (Ohms) TEMP (F) 173,631.0 −30 38,308.7 22 10,698.1 74 3602.5 126[...]

Outdoor-Air T emperature Sensor (Fig. 19) — The outdoor-air temperature (OA T) sensor is shipped inside the fan section. The OA T sensor continuously monitors the temperature of the air outside the building. The integral shield prevents ice formation on the sensor conductors. A field- supplied conduit junction box is required for installation. S[...]

NOTE: This sensor uses a resistance temperature device (R TD) element. Polarity is not a consideration. When space does not allow working inside the duct, mount as follows (Fig. 22): 1. Open a duct penetration on the opposite side of the sen- sor junction box. 2. W rap the element around a 3 ⁄ 4 -in. PVC pipe, cut holes near the center of the duc[...]

Supply-Air T emperature Sensor (Fig. 25) — The supply-air temperature sensor (SA T) measures the tempera- ture of the air as it leaves the supply fan. The sensor is factory- installed on the fan scroll. Return-Air T emperature Sensor (Fig. 25) — The return-air temperature sensor (RA T) is shipped inside the fan section. It measures the temperat[...]

Heat Interlock Relay (Fig. 27) — The heat interlock relay (HIR) is factory wired and installed on V A V units only . It is a single-pole, double-throw (SPDT) relay that provides normally-open and normally-closed contacts to interface with air terminal units. It allows the air terminals to open when the PIC unit goes into the heating mode. The con[...]

W all-Mounted Relative Humidity Sensor (Fig. 30) — The wall-mounted relative humidity sensor is packaged and shipped inside the fan section. It is installed on interior walls to measure the relative humidity of the air within the occupied space. The use of a junction box to accommodate the wiring is recommended for installation. The sensor may be[...]

Duct-Mounted Relative Humidity Sensor — The duct-mounted relative humidity sensor and mounting tem- plate are packaged and shipped inside the fan section. The sensor is installed in either the return air ductwork or in the outside air ductwork. If 2 relative humidity sensors are or- dered for dif ferential enthalpy control, then the sensors must [...]

Airflow Switch — The airflow switch (AFS) is a snap- acting SPDT switch that is factory installed in the PIC con- trol box. It senses the air supplied by the 39L or 39NX unit and provides the microprocessor module with a 24 vac dis- crete signal for fan status. See Fig. 35. A length of plenum tubing connects the switch to the probe located on t[...]

Filter Status Switch — The filter status switch (FL TS) is factory-installed in the filter section on all PIC-equipped units. The switch is a snap-acting SPDT switch. When dirty filter elements cause the pressure drop across the filter me- dia to exceed the switch setting, the switch closes and sends an alarm signal to the PIC. The 39L units [...]

Constant Outside Air (OAC) Control — This fea- ture ensures a continuous supply of outside air to the unit and occupied space. The OAC control monitors the outside air velocity pressure (OA VP) with a probe and pressure trans- ducer . The pressure transducer is factory-installed; the probe is factory-supplied for field installation in the outsid[...]

OAC CALIBRA TION — Once the probe and tubing are in- stalled, input the set point to match the probe readings. Be- fore adjusting the OA VP probe, ensure that the supply-air fan is providing the maximum design airflow and that the outside-air dampers are adjusted for the design outdoor airflow intake. T o calibrate the PIC processor to match th[...]

Field Wiring Connections — All field wiring must comply with National Electric Code (NEC) and all local re- quirements. The recommended wiring is as follows: Dampers, actuators, — 4-conductor 20 A WG cable and valves (2 twisted pairs, unshielded) Sensors — 2-conductor 20 A WG cable (one twisted pair , unshielded) Refer to T able 8 for recomm[...]

For factory-supplied actuators that are field-installed, the 24 vac power source is included with the unit wired in the control box. For field-supplied actuators, a 24 vac power source must be field-supplied and installed for each actuator . To prevent equipment damage: Power must NOT be con- nected to an earth ground; actuator case must NOT be [...]

T able 9 — Recommended Actuators P ART NO. VOL T AGE (50/60 Hz) V A (24 vac) IMPEDANCE (Ohms) SIGNAL INPUT (mA) DAMPER AREA (sq ft) TORQUE (in.-lb) STROKE Parallel Opposed HF27BB006 24 18 82.5 4 to 20 8.4 10.8 15 2 in. HY27BB001* 24 60 250.0 4 to 20 42 54 50 180° HF27BB010 24 44 82.5 4 to 20 106 137 190 3 1 ⁄ 2 in. *Shipped with drive HF39CB00[...]

LEGEND OAD — Outside Air Damper Actuator RAD — Return Air Damper Actuator Factory Wiring Field Wiring NOTE: Connections for 39NX with integral PIC shown. 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-Supp[...]

LEGEND AO — Analog Output EV AC — Evacuation EXD — Exhaust Air Damper Actuator FSD — Fire Shut Down HOA — HAND/OFF/AUTO Switch HPS — High-Pressure Switch LT T — Low T emperature Thermostat OAD — Outside Air Damper Actuator PRES — Pressurization RAD — Return Air Damper Actuator RFR — Return Fan Relay SF — Supply Fan Contactor[...]

LEGEND AO — Analog Output EV AC — Evacuation EXD — Exhaust Air Damper Actuator FSD — Fire Shut Down HOA — HAND/OFF/AUTO Switch HPS — High-Pressure Switch LT T — Low T emperature Thermostat OAD — Outside Air Damper Actuator PRES — Pressurization RAD — Return Air Damper Actuator RFR — Return Fan Relay SF — Supply Fan Contactor[...]

ANALOG DEVICE FOR ANALOG OUTPUT TEMPERA- TURE CONTROL — The analog controlled device selected must be capable of receivin ga4t o2 0m A signal. Its internal impedance must not exceed 600 ohms. The power supply of the analog device must be field in- stalled. Using a 20 A WG twisted wire pair, wire the control signal as follows (Fig. 51). 1. Connec[...]

HUMIDIFICA TION DEVICES Modulating V alve for Analog Output Humidity Control (Fig. 55) — V alve selected must be able to receiv ea4t o 20 mA signal and must NOT exceed an impedance of 600 ohms. V alve power supply must be field-installed and isolated. Install valve on humidifier piping and connect actuator power supply . Using a 20 A WG twisted[...]

The 24 vac power source(s) to both duct mounted and wall mounted relative humidity transmitters MUST be isolated. Connecting either side to a ground will per- manently damage the sensor. The power for the relative humidity transmitters may be sourced from the valve 24 vac power source at wire no. 6 and 7 or at wire no. 4 and 5. Connect the signal w[...]

Field Wiring Fig. 59 — Duct Mounted Relative Humidity T ransmitter Wiring Fig. 60 — W all Mounted Relative Humidity T ransmitter Wiring LEGEND RH — Relative Humidity Field Wiring Fig. 61 — Wiring of Relative Humidity T ransmitters 61[...]

AIR QUALITY SENSOR — Air quality (AQ) sensors are CO 2 sensors shipped inside the fan section for field instal- lation. T o wire the sensors after they are mounted in the con- ditioned air space and return air duct, see Fig. 62 and the instructions shipped with the sensors. For each sensor , use two 2-conductor 20 A WG twisted-pair cables (unshi[...]

LEGEND RVP — Return V elocity Pressure T ransducer SVP — Supply V elocity Pressure T ransducer Field T ubing NOTE: Connections for 39NX with integral PIC shown. See wiring diagrams in Fig. 9 and 12 for terminal connections in 39L control box and all remote-mount control boxes. Fig. 64 — Fan V olume Control — Differential Pressure T ransduce[...]

Pulse-T ype Meter (Fig. 67) — Monitors power usage, which is passed through the Carrier Comfort Network (CCN) for use by the loadshed module of the Building Supervisor . The meter must provide a dry contact signal (not exceeding 4 Hz maximum). Using a 2-conductor 20 A WG shielded twisted- pair conductor cable, connect one wire to terminal 35 of t[...]

All system software and operating intelligence is in the processor (PSIO master) module, which controls the unit. This module monitors and controls conditions through input and output ports and through the option (PSIO slave) and relay (DSIO) modules. The machine operator communicates with the PSIO mas- ter through the local interface device (HSIO)[...]

LEGEND AHU — Air Handling Unit CUST — Condensing Unit Status DSIO — Relay Module DX — Direct Expansion OA T — Outdoor Air Thermostat PIC — Product Integrated Control Factory Wiring Field Wiring Fig. 70 — Outdoor Air Thermostat/DSIO Wiring 66[...]

Local Interface Device (HSIO) (Fig. 74) — The HSIO consists of a keyboard with 6 function keys, 5 opera- tive keys, 10 numeric keys (0-9), and an alphanumeric 8-character liquid crystal display (LCD). Key use is ex- plained in T able 10. Each function has one or more subfunc- tions as shown in T able 11. These functions are described in greater d[...]

T able 1 1 — Functions and Subfunctions SUB- FUNCTION NUMBER FUNCTION Status History Schedule Service Set Point T est 1 Current alarms Alarm history Occupied mode override sched 1 Log on and Log off System set points Quick test of inputs 2 Current operating modes Maintenance history Period 1 of schedule 1 Software version Demand limits Quick test[...]

CONTROL OPERA TION Accessing Functions and Subfunctions — See T able 12. Refer also to T able 11, which shows the 6 func- tions (identified by name) and the subfunctions (identified by number). T able 13 shows the sequence of all the elements in a subfunction. Display Functions SUMMAR Y DISPLA Y — Whenever the keyboard has not been used for 1[...]

T able 13 — Keyboard Directory ST A TUS Keyboard Entry Display Description ALARMS Current alarm display ALARM X 1st alarm ALARM X 2nd alarm ALARM X 3rd alarm ALARM X 4th alarm ALARM X 5th alarm ALARM X 6th alarm ALARM X 7th alarm ALARM X 8th alarm ALARM X 9th alarm ALARM X 10th alarm ALARM X 1 1th alarm ALARM X 12th alarm ALARM X 13th alarm ALARM[...]

T able 13 — Keyboard Directory (cont) ST A TUS Keyboard Entry Display Description INPUTS System inputs SPT X Space temperature SA T X Supply air temperature RA T X Return air temperature OA T X Outside air temperature OA T X Outside air temperature forced (x = forced value) SP X Static pressure SFS X Supply fan status ENT X Enthalpy switch status[...]

T able 13 — Keyboard Directory (cont) SCHEDULE Keyboard Entry Display Description OVRD X Number of hours to extend occupied mode of schedule 1 PERIOD 1 Define period 1 of time schedule 1 OCC X Start of occupied time UNO X Start of unoccupied time MON X Monday flag (x = entry code) (1 = yes, .0 or CLR = no) TUE X T uesday flag (x = entry code) [...]

T able 13 — Keyboard Directory (cont) SERVICE CONFIGURA TIONS Keyboard Entry Display Description COOLCOIL Configuration of cooling (chilled water coil or DX) MPG X Master proportional gain MIG X Master integral gain MDG X Master derivative gain SMG X Submaster gain SCV X Submaster center value HHL X High humidity limit SMR X Submaster reference [...]

T able 13 — Keyboard Directory (cont) SERVICE CONFIGURA TIONS Keyboard Entry Display Description AIRQUAL1 Configuration of indoor air quality and AQ sensor no. 1 MPG X Master proportional gain MIG X Master integral gain XDP X Maximum damper position Q1L V X Air quality sensor 1 low voltage point Q1HV X Air quality sensor 1 high voltage point Q1L[...]

T able 13 — Keyboard Directory (cont) SERVICE CONFIGURA TIONS Keyboard Entry Display Description AO CTRL Configuration of analog temperature/ preheat coil control MPG X Master proportional gain MIG X Master integral gain MDG X Master derivative gain SMG X Submaster gain SCV X Submaster center value FOV X Fan off value SEN X Controlling temperatu[...]

T able 13 — Keyboard Directory (cont) QUICK TEST Keyboard Entry Display Description INPUTS Factory/field test of inputs SA T X Supply air temperature OA T X Outside air temperature SPT X Space temperature RA T X Return air temperature ENT X Enthalpy switch status SFS X Airflow switch status FRZ X Freezestat SP X Static pressure RH X Return air [...]

T able 13 — Keyboard Directory (cont) QUICK TEST Keyboard Entry Display Description ELE HEA T Factory/field test of electric heat EHS1 X Stage 1 test STG1 TST T esting of electric heat stage 1 EHS2 X Stage 2 test STG2 TST T esting of electric heat stage 2 EHS3 X Stage 3 test STG3 TST T esting of electric heat stage 3 EHS4 X Stage 4 test STG4 TST[...]

ST A TUS FUNCTION — The status function shows the cur- rent status of alarm (diagnostic) codes, operating modes, set points, all measured system temperatures, output values, and input values. These subfunctions are defined on pages 78-80. Refer to T able 11 for additional information. (Alarms) — Alarms are messages that one or more faults have[...]

Occupied Cooling (31) — Indicates that the unit is in the Cooling mode to satisfy its Occupied Cooling set point. Occupied Fan Only (32) — Indicates that the unit is main- taining set point by using a mixture of outside and return air only . No mechanical heating or cooling is being used. Nighttime Fr ee Cooling (33) — Indicates that the supp[...]

T able 15 — State of Items Controlled MODE (DISPLA Y CODE) RETURN FA N SUPPL Y FA N OUTDOOR- AIR DAMPER RETURN- AIR DAMPER EXHAUST DAMPER SUPPL Y F AN INLET GUIDE V ANES (IGV) RETURN F AN IGV HEA T INTERLOCK RELA Y ELECTRIC HEA T ALL ST AGES Pressurization (34) Of f On Open Close Close Open to Static Pressure Set Point Close On Of f Purge (36) On[...]

— Displays the latest service date on the local in- terface device. The last 2 service dates are displayed at the Building Supervisor . TEST FUNCTION — The test function operates the Quick T est diagnostic program. — Displays the status of all inputs. ------------------------------------------------ — T ests the outputs. -------------------[...]

T able 16 — Service Configuration Ranges and Defaults SERVICE SUBFUNCTION NUMBER CONFIGURA TION V ALUE RANGE F ACTOR Y DEF AUL T V ALUE 3 Unit T ype (0 = CV , 1 = V A V) 0/1 0 Cooling T ype (0 = none, 1 = chilled water coil ,2=D X ) 0t o2 1 DX Cooling Stages 0 to 8 2 Heating T ype (0 = none, 1 = hot water/steam coil, 2 = electric heater) 0t o2 1[...]

T able 16 — Service Configuration Ranges and Defaults (cont) SERVICE SUBFUNCTION NUMBER CONFIGURA TION V ALUE RANGE F ACTOR Y DEF AUL T V ALUE 13 Night Purge Duration (minutes) 5 to 240 15 Night Purge Low T emperature Damper Position (% output) 0 to 100 10 Night Purge High T emperature Damper Position (% output) 0 to 100 35 14 Constant Outside A[...]

— Used to verify software version. ------------------------------------------------ — Used to verify and change factory configura- tion. Requires password entry in . See Example 7. NOTE: When more than one unit is connected to the Carrier Comfort Network, the element address must be changed on all but one unit. The element address system defau[...]

— Used to read or change factory configuration of heating coil. See Example 10. Example 10 — Configuration of Heating Coil KEYBOARD ENTR Y DISPLA Y RESPONSE COMMENTS HEA TCOIL Heat coil field configuration subfunction of service function MPG 8.0 Master proportional gain MPG N Master proportional gain value is changed to N, where N = new val[...]

— Used to read or change field configuration of fan tracking. See Example 13. ------------------------------------------------ — Used to read or change factory configura- tion of humidity control. ------------------------------------------------ — Used to read or change factory configura- tion of alarm limits. See Example 14. ------------[...]

Example 16 — Configuration of Discrete T emperature Control KEYBOARD ENTR Y DISPLA Y RESPONSE COMMENTS DO CTRL Discrete temperature control configuration subfunction of service function SEN 1 Controlling temperature sensor configured to sensor 1. Sensor codes as follows: 1 - Supply-air temperature sensor (standard) 2 - Outdoor-air temperature [...]

Reading and Changing Set Points — Example 20 shows how to read and change system set points. Other set points can be changed by following the same procedure. Refer to T able 13 for the display sequence of set points in each sub- function.T o adjust any parameter after enabling the func- tion, press until desired parameter is displayed. Key in new[...]

Reading and Changing Holidays — Example 23 explains how to set holidays. Up to 18 holiday periods can be set for one calendar year . When the calendar year changes the holidays must be reconfigured for the new year . Example 23 — Setting of Holidays KEYBOARD ENTR Y DISPLA Y RESPONSE COMMENTS HOLIDA Y Holiday field config- uration subfunction[...]

Example 24 — Using the Schedule Function KEYBOARD ENTR Y DISPLA Y RESPONSE COMMENT PROGRAMMING PERIOD 1: PERIOD 1 Define schedule period 1 OCC 00.00 Start of occupied time. For this example, first period should start here (at midnight) so no entry is needed UNO 00.00 Start of unoccupied time (end of period). For this example, period 1 should en[...]

Example 24 — Using the Schedule Function (cont) KEYBOARD ENTR Y DISPLA Y RESPONSE COMMENT PROGRAMMING PERIOD 3: For this example, Period 3 is used on Wednesday only . OCC 00.00 Start of occupied time OCC 7.00 Occupied time will start at 7:00 am UNO 00.00 Start of unoccupied time (end of period 3). For this example, period 3 should end at 21:30 (9[...]

CONTROL OPERA TING SEQUENCE Constant V olume and V ariable Air V olume Units TWO-POSITION DAMPER CONTROL — T wo-position damper control opens or closes field-supplied and installed two-position outdoor-air dampers in order to provide mini- mum outdoor air ventilation. If the supply fan is OFF , the damper is closed. If the sup- ply fan is ON, th[...]

DISCRETE OUTPUT/ANALOG INPUT CONTROL — The discrete output is controlled as a function of a temperature sensor connected to the 39L or 39NX unit. (Applicable sen- sors are: space temperature sensor , outside-air temperature sensor , mixed-air temperature sensor , supply-air tempera- ture sensor , and return-air temperature sensor .) The discrete [...]

INDOOR-AIR QUALITY (IAQ) — This function main- tains the correct occupied ventilation rate using CO 2 as an indicator of occupancy level or controls the levels of volatile organic compounds (VOCs) or other indoor air pollutants by modulating the mixed air dampers. V arying quantities of out- door air are admitted during the Occupied period to mai[...]

LEGEND AQ — Air Quality Sensor IAQ — Indoor-Air Quality MA T — Mixed-Air T emperature OA T — Outdoor-Air T emperature RH — Relative Humidity SA T — Supply-Air T emperature SPT — Space T emperature VAV — V ariable Air V olume Fig. 76 — Indoor-Air Quality (IAQ) Control Operation 95[...]

SMOKE CONTROL — When the 39L or 39NX unit is equipped with an optional smoke control and a fire system is installed, 4 modes are provided to control smoke within areas serviced by the air-handling unit. Each mode must be energized individually from the approved building fire alarm system, and the corresponding alarm is then generated at the loc[...]

LEGEND CCV — Cooling Coil V alve CV — Constant V olume DX — Direct Expansion RA T — Return-Air T emperature RH — Relative Humidity Fig. 77 — Cooling (DX and Chilled W ater) Control Operation 97[...]

LEGEND DX — Direct Expansion MA T — Mixed-Air T emperature RA T — Return-Air T emperature SA T — Supply-Air T emperature Fig. 78 — DX Submaster Gain Control Operation 98[...]

MIXED-AIR DAMPER CONTROL — The mixed-air damper control adjusts modulating outside-air , return-air , and exhaust- air dampers. When outside air conditions are unsuitable for atmospheric cooling, the dampers are held to an adjustable minimum outside air position. When outside air conditions are suitable for atmospheric cooling, the mixed-air damp[...]

HEA TING COIL CONTROL — The heating coil control ad- justs the steam or hot water valve. Heat is primarily used for morning warm-up or Occupied Heating with the valve modu- lated to maintain desired return-air temperature. If the supply fan is OFF , the heating valve is modulated to maintain a desired minimum duct temperature (fan of f value). If[...]

LEGEND OA — Outside Air OAC — Constant Outside Air OA VP — Outside Air V elocity Pressure VAV — V ariable Air V olume Fig. 79 — Constant Outside Air (OAC) Control Operation 101[...]

SP ACE TEMPERA TURE RESET — The space tempera- ture reset is used to reset the supply-air temperature set point upward as the space temperature falls below the Occupied Cooling set point. As space temperature falls below the cool- ing set point, the space temperature is reset upward as a func- tion of the reset ratio. The reset ratio is the degre[...]

ST ART -UP Initial Check IMPOR T ANT : Do not attempt to start unit, even mo- mentarily , until the following steps have been com- pleted. 1. V erify unit has been installed per the Installation, Start- Up, and Service Instructions shipped inside the unit. 2. V erify that all auxiliary components (valves, sensors, etc.) have been installed and wire[...]

T able 18 — T est of Input Signals KEYBOARD ENTR Y DISPLA Y RESPONSE COMMENTS/ACTION INPUTS Field testing of inputs (X = current value. All temperatures should be 6 2 degrees F from actual) SA T X V erify that the supply-air temperature sensor reading agrees with the actual temperature. OA T X V erify that the outdoor-air temperature sensor readi[...]

T able 18 — T est of Input Signals (cont) KEYBOARD ENTR Y DISPLA Y RESPONSE COMMENTS/ACTION FSD NRM At T erminal Block 3, short T erminals 1 and 2. Verify that the display changes to FSD ALM. Verify the following: • Supply fan is OFF • Outside air and exhaust dampers (if applicable) close • Return fan is OFF • Supply fan IGVs close (V A V[...]

T able 19 — T est of Output Signals KEYBOARD ENTR Y DISPLA Y RESPONSE COMMENTS/ACTION OUTPUTS Field testing of outputs. (Set HOA switch to OFF .) HCV % Press ENTR if unit is equipped with a hot water or steam valve. Otherwise press HCV TEST V erify that the hot water or steam valve strokes to its 100% position. CCV % The hot water or steam valve [...]

T able 20 — T est of Output Options Using Option Module KEYBOARD ENTR Y DISPLA Y RESPONSE COMMENTS/ACTION RFVC X RFVCTEST V erify that the return fan IGVs stroke to their fully open position. HUM1 % The return fan IGVs should close. HUM1TEST V erify that the return fan IGVs, if so equipped, return to their fully closed position. If equipped with [...]

T able 22 — Direct Expansion (DX) Cooling T est KEYBOARD ENTR Y DISPLA Y RESPONSE COMMENTS/ACTION NOTE: Only the configured number of stages are tested and appear on the display . DX COOL Entering field test DX cooling coil. (Set the HOA switch to AUTO.) DXS1 X STG1 TST The fan starts. If fan has IGVs, the IGVs open to 30%. After an 1 1-second [...]

T o verify or adjust submaster default values, perform the following for each controlled device (control loop): 1. V erify that controlled devices (cooling coil valve [CCV], heating coil valve [HCV]) are properly piped and wired. 2. Using the local interface device, force each controlled device fully open and fully closed. Make sure the ac- tuators[...]

T o remove the actuator from the high-temperature valve linkage extension or from the 2-way normally-open valve mounting nut, proceed as follows: 1. Secure the high-temperature linkage extension or 1 5 ⁄ 8 -in. valve mounting nut to prevent turning. 2. T urn the actuator base (by hand) counterclockwise of f the high-temperature linkage extension [...]

TO REASSEMBLE ACTUA TOR TO V AL VE BODY : All 2-way normally-open valves: 1. Push the valve stem completely down and close seat valve. NOTE: It may be necessary to shut down the system pump to ensure valve stem is closed. 2. Loosen locknut and screw stem extension down fully on valve stem to adjust stem extension for proper closure. 3. Attach actua[...]

If only the PSIO slave or DSIO module indicate commu- nication failure, check the af fected module for proper seat- ing. If the condition persists even though connections are correct, replace the module as described in the following section. Module Replacement (PSIO, DSIO) — The PSIO master module controls the standard unit functions, the PSIO sl[...]

UNIT TROUBLESHOOTING PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Unit does not run PIC control is OFF Check for correct power or blown fuses (F2). Correct any deficiencies. Faulty connections Check LEDs on control module (PSIO). If LED is not solidly illuminated, check for loose connections. If all wires and connectors are secure, replace PSIO module[...]

UNIT TROUBLESHOOTING (cont) PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Mixed-air dampers will not operate No fan status Check status of SFS (4 ST A T). If supply fan status switch is OFF , check switch for proper operation. Mixed-air dampers forced closed to outside air Check status of MIXD (5 ST A T). If MIXD is forced, remove force and check operat[...]

UNIT TROUBLESHOOTING (cont) PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Constant outside air (OAC) malfunctioning OAC not enabled Enable OAC. Fan status is OFF V erify fan is operating and supply fan status is correct. Sup- ply fan status must be ON to allow OAC control. According to occupancy schedule, building is unoccupied V erify that current time[...]

METRIC CONVERSION CHART Copyright 1996 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 3 Ta b 1 b PC 201 Catalog No. 533-913 Printed in U.S.A. Form 39L,NX-2SI Pg 1 16 3-96 Replaces: 39L,NX-1SI[...]