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Carrier 11-808-427-01 - page 1
R R T T U U O O p p e e n n I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d S S t t a a r r t t - - u u p p G G u u i i d d e e CARRIER CORPORATION ©2010 A memb er of the United Technol ogies C orporati on family · Stock s ymbol UTX · Ca talog No. 1 1 - 808 - 427 - 01 · 11/19/2010 ...
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RTU Op en i Table of Co ntents Introduction .................................................................................................................................................................. 1 What is t he RT U Open co ntrolle r? ........................................................................................................ ...
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Table of Contents ii RT U Open Wir ing a sta tus switch ......................................................................................................................... 31 Wiring specificat ions ................................................................................................................ 31 To wire a stat us switch to th ...
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Table of Contents RTU Op en iii Linka ge ................................................................................................................................................................ 71 I/O Poin ts ..................................................................................................................................... ...
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RTU Op en 1 What is the RTU Ope n con trolle r? The RT U Open co ntroller i s availa ble as an integrat ed comp onent of a Carrier rooftop unit, or a s a field - installed retrofit product. Its in ternal application programming provides optimum rooftop performance and energy efficiency. RTU Open enables the unit to run in 100% sta nd - alone contro ...
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Introduction 2 RTU Op en ...
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RTU Op en 3 Specifi catio ns RTU Open dr iver drv_ rtuopn_std Power 24 Vac ±10%, 50 – 60 Hz 20 VA power consumption (26 VA with BAC view Access port attached) 26 Vdc (25 V min, 30 V max) Single Class 2 source only, 100 VA or less To connect a BAC J12 view 6 Handh eld, Virtual BAC view Rnet port , or Field Assistant For SPT sensors and a BAC J13 ...
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Introduction 4 RTU Op en Overall dimen sions A: B: 6- 1/2 in. (16.5 cm) 6- 1/2 in. (16.5 cm) Mounting d imension s 7 mounting holes in various positions Panel depth 2- 1/2 in. (6.4 cm) Weight 11. 2 oz (0.32 kg) BACnet support Conforms to the Advan ced Application Controller (B - AAC) Standard Device Profi le as def ined in A NSI/ASH RAE Standa rd 1 ...
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Carrier 11-808-427-01 - page 11
RTU Op en 5 To install th e RTU Open: 1 Mount the controller (page 6). 2 Wire the controller for power (page 7). ○ Using the rooftop equipment control power tr ansformer (page 7). ○ Using an auxiliary control power transfor mer (page 8). 3 Set the controller's address (page 9). 4 Wire inputs and o utputs (p ag e 12 ). 5 Wire sensors to the ...
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Carrier 11-808-427-01 - page 12
Installat ion 6 RTU Op en To mou nt the RT U Open When you handle t he RTU Open: • Do not contami nate the p rin ted circ uit board with finge rprints , moisture, or any f oreign m ater ial. • Do not touch co mponents or leads. • Handle t he board by it s edges. • Isolate from hig h voltage or electrostatic d ischarge. • Ensure that yo u ...
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Carrier 11-808-427-01 - page 13
RTU Op en 7 Screw the RTU O p en into an enclos ed panel us ing the mo unting slots on t he cover p late. L eave a bout 2 in. ( 5 cm) on each side of t he controller for wiring. To wire the controller for power ○ The RTU Open is powered by a Class 2 power sou rce. Take approp riate is olation me asures when mounting i t in a co ntrol p anel w her ...
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Installat ion 8 RTU Op en 3 If the rooftop equipment has therm ostat con nection t ermina ls, conne ct wiring harnes s J1 wire 1 to R, and J1 wire 3 to C. Alternately, connect the control power transformer wires to J1 connector wires 1 (24 Vac) and 3 (Gnd) . 4 Apply power to the rooftop equipment. 5 Measure the voltage at the R TU O pen’s J1 term ...
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Carrier 11-808-427-01 - page 15
RTU Op en 9 Option al * Safety chain dev ices, field - installed - n ormally close d. Apply 24 Vac to this terminal (jumper from J1 - 1 to J1 - 9) where no s afety devices are installed. ** Fire shu tdown device, field - installed , configur able as no rmally o pen or cl osed *** Enthalpy switc h, field - installed - configurabl e as norm ally ope ...
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Carrier 11-808-427-01 - page 16
Installat ion 10 RTU Op en 1 Turn off the RT U Open's power . The controller r eads the address each time you apply power to it. 2 Using the rota ry switches, se t the MSB (SW1) ( 10's ) switch to the tens digit of the address, and set the LSB (SW2) ( 1's ) switc h to the ones digit. EXAMP LE To set the RTU Open’s address to 01, po ...
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Carrier 11-808-427-01 - page 17
RTU Op en 11 Inst all a B T485 on the first and last controll er on a network se gment t o add bi as and pre vent si gnal distortions due to echoing. See the MS/TP Netw orking and Wiring Inst allation Guide for mo re details. Wir ing s pecif icat ions Cable: 22 AWG or 24 AWG, low - capac itance, twiste d, stranded , shield ed copper wire Maximum l ...
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Installat ion 12 RTU Op en Wiring inpu ts and o utputs RTU O pen Inputs a nd Outp uts Table Channel Number Type Signal Fun ctio n Part Number Wire/ Termina l Number s Input 1 Altern ate Termin als AI 4- 20 mA CO2 OAQ Space Relative H umidity 33ZCT55CO2 33ZCT56CO2 33ZCSENCO2 w/ 33ZCASPCO2 33ZCSENSRH - 01 J4 N/A - 5 & 6 Input 2 AI 4- 20 mA CO2 OA ...
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RTU Op en 13 Channel Number Type Signal Fun ctio n Part Number Wire/ Termina l Number s BO - 8 Altern ate Termin als BO N/A - Relay Power E xhaust N/A J11 N/A - 1 & 3 Legend AI - Analog Input AO - Analog Output BI - Digital Input BO - Digital Output * Safety Chai n Feedback - 24 Vac requi red at this wire to provide Run En abled status. Provide ...
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Carrier 11-808-427-01 - page 20
Installat ion 14 RTU Op en Binary outputs The RT U Open has 8 b inary o utputs. Y ou can co nnect e ach outp ut to a m aximum of 24 Vac/V dc. E ach output is a dry contact rated at 3 A, 24 V maximum , and is no rmally open. To size output wiri ng, consider the following: • Total loop distance from the power supply to the controller, and then to t ...
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Carrier 11-808-427-01 - page 21
RTU Op en 15 Optional * Safety chain dev ices, field - installed - n ormally close d. Apply 24 Vac to th is terminal (jumper from J1 - 1 to J1 - 9) where no safety devices are instal led. ** Fire shu tdown device, field - ins talled, configu rable as normal ly ope n or closed *** Enthalpy switc h, field - installed - configurabl e as norm ally ope ...
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Carrier 11-808-427-01 - page 22
Installat ion 16 RTU Op en NOTE J4 Analog In puts 1 an d 2 may be set for the following device types: ○ IAQ Sensor ○ OAQ Senso r ○ Space RH Sensor J5 Inputs The ter minals fo r Inputs 3 , 5, an d 8 are a vailable for use in plac e of the f lying wi re leads at Mole x connectors J1 and J2 identifie d below: NOTE J5 binary inputs 3 , 5, and 8 a ...
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RTU Op e n 17 These ter minals are availa ble for use in place o f the flying wir e leads at Molex conn ectors J1 and J2 . Binary i nputs are confi gurable a nd may be used fo r the following function s: Input Default in put fu nction Additio nal fu nctions Compressor Safety 3 Fan Status Filter S tatus Remote Occupancy Door Con tact Fire Shutdown 5 ...
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Carrier 11-808-427-01 - page 24
Installat ion 18 RTU Op en NOTE Output relay conta cts r ated at 3A , 24V maxim um. I nstall p ilot rel ays requir ed by ap plicatio n. NOTE J20 An alog Inputs 10 and 11 are reserved for a 10k Ohm space temperature senso r with an optional 100k Oh m off set potentiometer u sed for setpoint adjustment. Wiring sensors to i nputs You may wire various ...
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Carrier 11-808-427-01 - page 25
RTU Op en 19 NOTE For roof top unit i nstalla tion, see t he base unit inst allati on instruc tions. Failure to foll ow this w arning co uld cause personal injury , deat h, and/o r equipme nt dama ge. ELECTRI CAL SHOCK HAZA RD Disconnect all power to the unit before performing maintenance or serv ice. Unit may automatically start if power is not di ...
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Carrier 11-808-427-01 - page 26
Installat ion 20 RTU Op en Wir ing a n SPT sensor The RTU Open is connected to a wall - mounted space temperature sensor to monitor room temperature. An i - Vu Open Control System of fers the following SPT sensors: Sensor Part # Feat ures SPS SPT Standard • Local access port • No operator control SPPL SPT P lus • Slide potentiometer to adjust ...
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Carrier 11-808-427-01 - page 27
RTU Op en 21 Voltage 300 Vac, power limited Listing UL: NEC CL2 P, or b etter To wire the SPT sensor to the controll e r 1 Partial ly cut, t hen bend a nd pull off the outer j acket of the Rnet cabl e(s). Do not nick t he inner i nsulatio n. Strip ab out .25 i nch (.6 cm ) of t he inner i nsulatio n from eac h wire . Outer Jac k et Inner i nsulat i ...
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Carrier 11-808-427-01 - page 28
Installat ion 22 RTU Op en Wiring speci fications Cable from sensor to co ntroller: If <100 ft (30.5 meters) 22 AWG, un shielded If >100 ft (30.5 meters) 22 AW G, shielded Maximum l ength: 500 feet (152 meters) To wire the SAT sensor to the c ontrol ler 1 Connect the wiri ng harne ss (OPN - RTUHRN). For details, see To wire inputs and outputs ...
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Carrier 11-808-427-01 - page 29
RTU Op en 23 To wire a duct sensor to the controlle r 1 Connect the wiri ng harne ss ( Part#OPN - RTUHRN). For d etails, se e To wire inputs and outputs (page 14). 2 Wire the sensor to the wiring harness. See diagram below. 3 Connect to J2 wires 1 and 2. 4 Verif y your sensor readings. 5 Drill .25" di ameter hole . Pass sensor le ads t hroug h ...
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Carrier 11-808-427-01 - page 30
Installat ion 24 RTU Op en 3 Connect to J2 wires 3 and 4. 4 Verif y your sensor readings. Wir ing a CO2 se nsor Part #33ZCSENCO2 (Display model) Part #33ZCT55CO2 (No display) Part #33ZCT56CO2 (No display) A CO 2 sensor monitor s carbon d ioxide le vels. As CO 2 le vels increase, t he RTU O pen adjusts the o utside air dampe rs to increa se ventil a ...
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Carrier 11-808-427-01 - page 31
RTU Op en 25 Wirin g diagr a m for #33ZCSENCO2: Wiring diagram for #33ZCT55/56CO2: Wir ing a n Outd oor A ir Qu ality sens or Part #33ZCSENCO2 (Display model) An outd oor air q uality (O AQ) sen sor monit ors outs ide air c arbon dioxid e level s. The RTU Open uses t his inform ation, in co njunctio n with a CO2 senso r, to ad just the outs ide air ...
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Carrier 11-808-427-01 - page 32
Installat ion 26 RTU Op en The sensor ha s a rang e of 0 – 20 00 ppm and a line ar 4 - 20 mA output. The CO2 sensor’s power requirements exceed what is ava ilable at J4 - 1 and 4. Provide a d edicated 24 Vac transformer or DC power s upply. Wiring speci fications Cable from sensor to co ntroller: If <100 ft (30.5 meters) 22 AWG, unshielded I ...
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Carrier 11-808-427-01 - page 33
RTU Op en 27 Wiring speci fications Cable from sensor to co ntroller: If <100 ft (30.5 meters) 22 AWG, un shielded If >100 ft (30.5 meters) 22 AW G, shi elded Maximum l ength: 500 feet (152 meters) To wire the RH sensor to the controll e r 1 Strip the outer jacket from the cable f or at least 4 inches (10.2 cm). Strip .25 inch (.6 cm) of insu ...
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Carrier 11-808-427-01 - page 34
Installat ion 28 RTU Op en To wire a humidis ta t to the controlle r 1 Strip the outer jacket from the cable f or at least 4 inches (10.2 cm). Strip .25 inch (.6 cm) of insulation from each wire 2 Wire the h umidistat to the c ontroller. See diagr am below. 3 Apply p ower and verify se nsor read ings. NOTE Humidist at may be re turn duct or sp ace ...
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Carrier 11-808-427-01 - page 35
RTU Op en 29 To wire an enthalpy sw i tch (outdoor air) to the controller An enhalpy s witch is typically m ounted in th e outdoor air inlet. Wirin g diagra m for a fie ld - install ed entha lpy switc h: NOTES • Factory - installed enthalpy switches termina te at J 2 wires 6 (switch input) and 7 (24 V ac). • Input c hannel m ust be co nfigur ed ...
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Carrier 11-808-427-01 - page 36
Installat ion 30 RTU Op en Wiring diagram for f actory - install ed entha lpy switc h: NOTE Fac tory - installed enthalpy switches terminate at J2 wires 6 (switch input) and 7 (24 V ac). To wire an enthalpy sw i tch (differential) to the controlle r ...
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Carrier 11-808-427-01 - page 37
RTU Op en 31 Wirin g diagra m for optio nal entha lpy sen sor moun ted in the r eturn air for diff erentia l enthalpy : Wir ing a stat us sw itch Filter - Part #33CSFS - 01 or field - supplied Fan stat us - Part #33CSAS - 01 or fiel d - supplied Filter and/or fan status switches may be insta lled to provide a Dirty Fi lter indica tion or Fan Ru nni ...
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Carrier 11-808-427-01 - page 38
Installat ion 32 RTU Op en To wire a status switc h to the controller NOTES • Binary inputs 3 , 5, 8, a nd 9 are confi gurable and may b e used fo r Fan Status , Filter Status , Remote Occupancy, or Door C ont acts , if t hey have not alread y been u sed fo r their de fault f unctions. • Foll ow devic e manufactur er's i nstall ation and o ...
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Carrier 11-808-427-01 - page 39
RTU Op e n 33 T o wire a compress or safety input to the c ontrol ler NOTES • An isolation relay may be required if the RTU Open is powered separately from the equipment's control power circuit. • Foll ow devic e manufactur er's i nstall ation and op erating instruct ions. Wir i ng an occu pancy s witch or door cont act Occupancy swit ...
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Carrier 11-808-427-01 - page 40
Installat ion 34 RTU Op en To wire an occupa ncy switch or door contact NOTES • Binary Inputs 3, 5, 8, a nd 9 are config urable and m ay be used for Fan Status , Filter Sta tus , Remote Occupancy , or Door C ontacts - provided they have not been utilized f or their default functions. • Foll ow devic e manufactur er's i nstall ation and op ...
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Carrier 11-808-427-01 - page 41
RTU Op en 35 To start up the RTU Open, you n eed one of the following user interfaces to the controller. The se items let you access the controller i nformation, read sensor val ues, and t est the controller. This interface... Provides a... i- Vu Open Permanent interf ace software Fiel d Assista nt software - runs on a laptop connecte d to controll ...
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Carrier 11-808-427-01 - page 42
Start - up 36 RTU Op en Serv ice Tes t Navigatio n: i- Vu / Field As sistant: BACvi ew: Propert ies > Equipm ent > Conf iguratio n > Service C onfigurat ion > Servic e Test HOME > CONFI G > SERVI CE > TEST Servic e Test can be used to verif y proper operation of compress ors, heating stages, indoor f an, power exhaust fans, ec ...
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Carrier 11-808-427-01 - page 43
RTU Op en 37 • Use Power Exh aust Test to activate and deactivate the power ex haust (BO - 8) output. • Use Econ omizer Test to s et the (AO - 1) economizer output to any value from 0 to 100% of configured output (2 - 10 Vdc or 4 - 20 mA). • Analo g Output 2 Test (AO - 2) is currently unused and doe s not r equire te sting. • Service Test m ...
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Carrier 11-808-427-01 - page 44
Start - up 38 RTU Op en Point Name/Desc ript ion Defaul t/Range Input 2 F unction D: – The type of sensor (4 - 20 mA) connected to t erminals J4 – 1, 2, & 3. R: No Sensor No Sensor IAQ Sensor OAQ Sens or Space RH Sensor Input 3 F unction – The usage of Input 3. Y ou must al so set Input 3 S witch Confi guration Options: . No Funct ion – ...
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Carrier 11-808-427-01 - page 45
RTU Op en 39 Point Name/Desc ript ion Defaul t/Range Input 9 Switch C onfigurati on D: – The normal (d e- energized) state for the set of contacts terminated at Input R: NO NO/NC (norm ally open/normally closed) Space s enso r type D: - The type of local space temperature sensor. R: T55 T55 T56 (Use for T59) SPT Sensor None Setp oint propert ies ...
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Carrier 11-808-427-01 - page 46
Start - up 40 RTU Op en Point Name/Desc ript ion Defaul t/Range Opti mal Star t D: – The earliest time, prior to occupan cy, at which t he Optimal Star t fun ction may begin to adjust the effective setpoints to achieve th e occupied setpoints by the time schedul ed occupanc y begi ns. Ente r 0 to disa ble Opt imal Start . R: 4 hr 0 to 4 hr Occ R ...
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Carrier 11-808-427-01 - page 47
RTU Op en 41 Point Name/Desc ript ion Defaul t/Range Contin uous Occupi ed Exhaust – Configures the exhaust fan control strategy (BO - 8). If Yes , the powe r exhaust runs co ntinuousl y in occupi ed mod e and is off in unoccupi ed mode . If No , the power exhaust is controlled by the D: Power E xhaust Set point. R: No No/Yes Indoor CO2 Sensor Va ...
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Carrier 11-808-427-01 - page 48
Sequence of Op eration 42 RTU Op en The RT U Open sup ports vari ous types of constant volume air source configur ations: • Standard heat/cool unit types with up to 2 - stages o f mechanic al cool ing and g as or e lectric heating • Heat pump units utilizi ng a reve rsing val ve output for heat ing an d cool ing control • Heat pump unit (Carr ...
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Carrier 11-808-427-01 - page 49
RTU Op en 43 Suppl y fan The RT U Open sup ply fan m ay be c onfigured for one o f t hree Fan Modes : • Auto - The fan cycles on/off in conjunction with heating or cooling • Contin uous - The fan ru ns conti nuously duri ng occ upancy a nd inte rmittent ly during unoccupi ed pe riods with h eating or cooling • Always On - The fan r uns conti ...
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Carrier 11-808-427-01 - page 50
Sequence of Op eration 44 RTU Op en The cooling relays are co ntrolled by the Cooli ng Control PID Loop and Cooli ng Stages Capacity algorithm. They calculate the desired number of stages need ed to satisfy the space by comparing the Space Tem perature to the: • Effect ive Occup ied Coo ling Setpo int when occupied • Effec tive Unoccu pied Cool ...
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Carrier 11-808-427-01 - page 51
RTU Op en 45 Unocc upied F ree Coo ling Unocc Fre e Cool E nable allows rooftop equipment with an economizer damper to utilize outdoor air for free cooling dur ing unocc upied perio ds. The following conditi ons must be true for unoccupied f ree cooling to operate: • Unocc Fre e Cool E nable set t o Ena ble • The system is unoccupied • The ou ...
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Carrier 11-808-427-01 - page 52
Sequence of Op eration 46 RTU Op en The actual equat ion that t he co ntroller us es to cal culate Optima l Start is nonlinear. An app roxim ation of t he result is s hown below. To change Optim al Start settings: 1 In the navigation tree, select the equipment th at you want to change. 2 Click Properties page > Equipment ta b > Configu ration ...
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Carrier 11-808-427-01 - page 53
RTU Op en 47 The following conditi ons must be true for the Indoor Air C O2 algorithm to operate: • The system is occupied • The sup ply fan has been started for at l east 30 seconds • The CO2 senso r has a valid read ing As the ai r qualit y within t he spac e chang es, the m inimum pos ition o f the econo mizer d amper c hanges, which allow ...
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Carrier 11-808-427-01 - page 54
Sequence of Op eration 48 RTU Op en Heat P ump o peration The RT U Open can c ontrol heat p umps HP O/B and Y1/W1 . HP O/B provid es a sep arate out put (B O - 7) to control a reversing valve. The reversing valve control may be confi gured to b e energized with a call f or heati ng (B) , or energ ized with a call for cooling ( O ). The sequence of ...
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Carrier 11-808-427-01 - page 55
RTU Op en 49 Dem and Limit The RTU Open may employ a demand limit strategy. Demand limiting in the RTU Open works through setpoint expansio n. The cont roller’s heat ing and c ooling setpoint s are ex panded i n steps or levels. The degree to which the setpoints are expanded is d efined by the Dema nd Lev el Setpoin ts . Each Dema nd Level (1 t h ...
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Carrier 11-808-427-01 - page 56
Sequence of Op eration 50 RTU Op en Cool ing, heating, and sup ply fan outputs are not interrup ted exc ept where the RT U Open i s configure d for Heat Pum p operati on. When conf igured f or Heat Pum p, and i n the heating mode, a compressor safety fault will caus e the available s tages of electric hea ting to be enabled in p lace of mechanic al ...
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Carrier 11-808-427-01 - page 57
RTU Op en 51 • For a no n - Carrie r Heat Pum p, w hen configu red f or two sta ges of aux heat and two comp ressors, Compressor 1 is replaced by Aux Heat Stage 1 and Compressor 2 is replaced by Aux Heat Stage 2. The compressor output stays on wh en the safety alarm is present. For cooling, the alarm indicates the compressors are down. See Heat P ...
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Carrier 11-808-427-01 - page 58
Sequence of Op eration 52 RTU Op en Functions 1 and 2 are configure d id enticall y. Neit her input may work reli ably a nd downstr eam c ontrol may be affe cted, d epending on the func tion dup licated . The alarm c lear s and norm al cont rol is rest ored w hen the input f unction dup lication i s corr ected . High Space Rela tive Hu midity - T h ...
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Carrier 11-808-427-01 - page 59
RTU Op en 53 Linkag e The RTU Open may serve as an air source to a n Open Variable Volume Terminal (VVT) system. When the RTU Open is part of a VVT system and the controllers are wired together to form a network, the controllers may use a method of comm unicatio n known a s Linkag e™. Lin kage is a method b y which an air sour ce and i ts subord ...
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Carrier 11-808-427-01 - page 60
Sequence of Op eration 54 RTU Op en The system remains in that mode u ntil all zones of that d emand ar e satisfi ed or u ntil a fi xed 30 minute mod e reselect timer causes a forced re - evaluation of the system. If there is no demand for the opposite mode, the resele ct timer s tarts agai n and the current mode co ntinues until all zo nes are sat ...
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Carrier 11-808-427-01 - page 61
RTU Op en 55 If you have problems mounting, wiring, or addressing the RTU Open, contact Carrier Control Systems Support. Seria l numbe r If you ne ed the RT U Open's seri al number w hen tro ubleshoot ing, the number is on: • a sticker on t he back of the main controller boa rd • a Module Status report (modstat) from your user interface LE ...
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Carrier 11-808-427-01 - page 62
Troublesh ooting 56 RTU Op en If Run LED shows... And Error LED shows... 14 flashes per second Status is.. 14 flashes per second, alternat ing with Run Brownout LED On On Failu re. Try th e following solution s: • Turn the RTU Op en off, th en on. • Format the RTU Open.* • Download memory to the RTU Open. • Replace the RTU Open. *Format tin ...
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Carrier 11-808-427-01 - page 63
RTU Op en 57 FCC Co mplia nce T his equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasona ble protection against harmful interference when the equipment is operated in a co mmercial environm ent. Thi s equipme nt gen erates, uses ...
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Carrier 11-808-427-01 - page 64
Appe ndix A: RTU Open Points/Pr operties 58 RTU Op en Status Navigatio n: i- Vu / Field As si stan t: BACvi ew: Propert ies > Equipm ent > Stat us HOME > STATU S Point Name/Desc ript ion Range System Mode R: – The control ler's cur rent operat ing status . Disabled Test Run Opera ting Mode R: – The controller's c urrent opera ...
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Carrier 11-808-427-01 - page 65
RTU Op en 59 Un it Conf igura tion Navigatio n: i- Vu / Field As sistant: BACvi ew: Propert ies > Equipm ent > Configu ration > Unit C onfigurati on HOME > CONFI G > UNI T Point Name/Desc ript ion Defaul t/Range Fan Mode Options: – The s upply f an's operat ing mode . Au to - The fan c ycles on/ off in c onjuncti on with he at ...
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Carrier 11-808-427-01 - page 66
Appe ndix A: RTU Open Points/Pr operties 60 RTU Op en Point Name/Desc ript ion Defaul t/Range HP Rev Cyc le Lockout T emp D: – The outdoo r air temp erature at which re v erse cycle heating i s locked out. Req uires t hat the uni t is co nfigured as a H eat Pump. R: -3°F - 20 to 30°F Heat ing Lock out Temper ature D: – The outdoor air tempera ...
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Carrier 11-808-427-01 - page 67
RTU Op en 61 Point Name/Desc ript ion Defaul t/Range Input 8 F unction – The usage of Input 8. Y ou must al so set Input 8 S witch Confi guration Op tions: . No Funct ion – The input is not used. Entha lpy Switc h – Indicat es ent halpy st atus (hig h or lo w). Fan Sta tus – Proves supply fan operation. Filter S tatus – Indicat es a dirty ...
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Carrier 11-808-427-01 - page 68
Appe ndix A: RTU Open Points/Pr operties 62 RTU Op en i- Vu / Field As sistant: Naviga tion: BACvi ew: Propert ies > Equipm ent > Configu ration > Setpo ints HOME > CONFI G > SETPOINT Select a color band on the setpoint graph to see the current setpoints in th e Hea ting and Cooling fields. See setpoint description s below. The occup ...
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Carrier 11-808-427-01 - page 69
RTU Op en 63 Def ault R ange: - 40 to 245°F Demand L evel Point Name/Desc ript ion Occ upied 1 2 3 Occup ied Coo ling 1 – Yellow The space temperature must be greater t han the Occupi ed Coolin g 1 setpoint for the VVT Mas ter to consider th e zone a cooling caller in a linked system. I n a single - zone appl ication, the cool ing re quireme nt ...
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Carrier 11-808-427-01 - page 70
Appe ndix A: RTU Open Points/Pr operties 64 RTU Op en Point Name/Desc ript ion Defaul t/Range Heat ing Capa city D: – Used for Optimal Start, this is the rate at which the zone temperature changes w hen the heating sy stem runs at ful l capaci ty to mai ntain d esigned o ccupied he ating setpoint. R: 5°F/hr 0 to 120°F/hr Heat ing Design Tem p D ...
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Carrier 11-808-427-01 - page 71
RTU Op en 65 Point Name/Desc ript ion Heat ing – (Occupied or Unoccupi ed, depending on mode) The current programmed Heat ing set point adjusted by any offset that may be in effect. Defaul t/Range R: 0 to 120°F Cooling – (Occupied or Unoccupied, depend ing on mode) The current programmed Cooling R: setpoint adjusted by any offset that ma y be ...
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Carrier 11-808-427-01 - page 72
Appe ndix A: RTU Open Points/Pr operties 66 RTU Op en Point Name/Desc ript ion Defaul t/Range Uno ccupied High SPT Alar m Limit – The value that the space temperature must exceed to generate a Space T emperatur e Alarm D: in the unoccupied mod e. There is a fixed hysteresis of 1° F for retur n to normal. R: 90°F - 60 to 250°F Supply Air Temper ...
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Carrier 11-808-427-01 - page 73
RTU Op en 67 Point Name/Desc ript ion Defaul t/Range Compressor Stages D: – The number of mechanical cooling stages. R: One Stage One Stage Two Sta ges Economiz er Exists – Set to Yes D: to enable economizer control f or units equipped with an economi zer da mper. R: No No/Yes Heat Type D: – The type of heating that the unit has. R: Electric ...
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Carrier 11-808-427-01 - page 74
Appe ndix A: RTU Open Points/Pr operties 68 RTU Op en Point Name/Desc ript ion Defaul t/Range Compress or 2 Tes t – Enable to test the controller's compressor 2 output. Se rvice Test must be set to Enable D: . R: Disable Disable/E nable Heat 1 T est – Enable to test the controller's heat 1 output. Servic e Test must be set to Enable D ...
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Carrier 11-808-427-01 - page 75
RTU Op en 69 Point Name/Desc ript ion Defaul t/Range Fire S hutdown – Shutdow n R: indicates t hat a fi re shutd own is in eff ect. Run Enab led/ Shu tdown Compressor Sa fety Status – Tr oubl e R: indicates that th e compressor safety device has tripped. Normal/Tr ouble Enthalpy Stat us R: – The enthalpy status determined by an enthalpy switc ...
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Carrier 11-808-427-01 - page 76
Appe ndix A: RTU Open Points/Pr operties 70 RTU Op en Ala rms i- Vu / Field Ass istant: Naviga tion: BACvi ew: Propert ies > Equipm ent > Ala rms HOME > ALA RM Point Name/Desc ript ion Range Safety Chain R: – Indicates i f the Safety Chain c ircuit trips. Normal/ Alarm Fire S hutdown R: – Indicates if the Fire Shutdown cir cuit trips. ...
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Carrier 11-808-427-01 - page 77
RTU Op en 71 Point Name/Desc ript ion Range Compre ssor 2 Ru ntime – Indicates if the compressor 1 runtime e xceeds the value of the Compress or 2 Servic e Alarm T imer R: . Normal/Alar m Filter – Indicates a dirty filter conditi on when the filt er runtime exceeds the value of the Filter Servic e Alarm Tim er R: or in response to a filter stat ...
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Carrier 11-808-427-01 - page 78
Appe ndix A: RTU Open Points/Pr operties 72 RTU Op en i- Vu / Field As sistant: Naviga tion: BACvi ew: Propert ies > I/O Points N/A Point Name/Desc ript ion Space T emp – The value of the Opt ional SPT (Rnet) sens or. Also allows i - Vu & Field A ssistant use rs access to sen sor confi guration. See C arrier Sen sors Inst allation Guide fo ...
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Carrier 11-808-427-01 - page 79
RTU Op en 73 Sin gle P oint Link age The RTU Open receives data from other Open co ntrollers when they are installed as part of an Open system. The dat a transf er may t ake the f orm of Si ngle Point Linkag e (SPL), w hich is automatic, or Dev ice Ad dress Bin ding, w hich you must c onfigure. Currentl y, the R TU Ope n implement s Single Poi nt L ...
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Carrier 11-808-427-01 - page 80
Appe ndix B: Single Point L inkage and Device Ad dress Binding 74 RTU Op en Devic e Address Bi nding As described previou sly, Device Addr ess B inding allows the RTU Open to receive data from other Open control lers whe n they are c onne cted by a network. You must confi gure this met hod. Currentl y, the R TU Ope n allows Devic e Addr ess Bindin ...
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Carrier 11-808-427-01 - page 81
Index RTU Op en 75 B BACnet compliance • 57 BACnet port • 11 BT485 • 10 C Compliance • 57 D Duct Air Tempe rature sensor • 22 Duct sensors Duct Air Tempe rature sensor • 22 Supply Air Temperature sensor • 21 F FCC compliance • 57 Field Assistant • 58 I i- Vu • 58 L Linkage • 73 M Module Status report • 55 MS/TP networ k, wir ...
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Carrier 11-808-427-01 - page 82
Index 76 RTU Op en Operating Mode • 58 Optimal Start • 39, 61 Outdoor Ai r CO2 • 58 Outdoor Ai r Temp Sensor Ala rm • 70 Outdoor Air Temperature • 58 Outdoor C O2 Sensor Value @ma x (ma) • 40, 66 Outdoor C O2 Sensor Value @mi n (ma) • 40, 66 Outsi de Air Temp Cal ibration • 59 Override Time Remaining • 68 Power Exhaust Setpoint ? ...
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Carrier 11-808-427-01 - page 83
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Carrier 11-808-427-01 - page 84
CARRIER COR PORATION ©2010 A memb er of th e Unit ed Tec hno logies C orporat ion fam ily · Sto ck symbol UTX · Catal og No. 11 - 808 - 427 - 01 · 11/19/2010 ...
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