48/50HJ004---014, 50HJQ004---012, 48/50HE003---006 50HEQ003---006, 48/50TM004---014 R T U --- M P ( M u l t i --- P r o t o c o l ) 2 . x C o n t r o l l e r BACnet, Modbus, Johnson N2, and LonWorks Controls, Start---Up, Operation and Troubleshooting Instructions TABLE OF CONTENTS START--UP........................................ 17 SAFETY CONSIDERATIONS......................... 2 Field Service Test.................................. 17 GENERAL......................................... 2 Configuration.................................... 17 ACCESSORY/SENSOR INSTALLATION................ 2 Unit.......................................... 17 Field--Supplied Hardware............................ 2 Cooling........................................ 17 User Interface...................................... 2 Heating........................................ 18 Install Sensors..................................... 5 Inputs......................................... 18 Space Temperature (SPT) Sensor Installation............ 5 Economizer.................................... 19 IAQ.......................................... 19 Indoor Air Quality CO2 Sensor Installation (IAQ)........ 7 Clock Set...................................... 19 Outdoor Air Quality CO2 Sensor Installation (OAQ)...... 7 Outdoor Air Temperature Sensor.................... 10 UserPW....................................... 19 Space Relative Humidity Sensor (SPRH).............. 12 Sequence of Operation.............................. 19 Outdoor Air Relative Humidity Sensor (OARH)........ 12 Scheduling..................................... 19 Connect Discrete Inputs............................. 13 Indoor Fan..................................... 20 Humidistat..................................... 13 Cooling........................................ 20 Fire Shutdown.................................. 13 Economizer.................................... 20 Filter Status..................................... 13 Power Exhaust.................................. 21 Fan Status...................................... 13 Heating........................................ 21 Remote Occupancy............................... 13 Indoor Air Quality............................... 21 Enthalpy Switch/Receiver.......................... 13 Dehumidification................................ 21 Outdoor Enthalpy Control......................... 14 Demand Limit.................................. 22 Differential Enthalpy Control....................... 14 TROUBLESHOOTING.............................. 22 Enthalpy Switch/Receiver Jumper Settings............. 15 General......................................... 22 Enthalpy Sensor Jumper Settings.................... 15 Communication LEDs.............................. 22 Communication Wiring--Protocols..................... 15 Alarms.......................................... 24 General........................................ 15 Third Party Networking............................. 24 BACnet MS/TP................................. 15 APPENDIX A: DISPLAY TABLES................. 26--32 Modbus....................................... 16 Johnson N2..................................... 16 LonWorks...................................... 16 Local Access.................................... 16 SAFETY CONSIDERATIONS ACCESSORY/SENSOR INSTALLATION Installation and servicing of air-conditioning equipment can be Field accessories for the RTU--MP include a room sensor, hazardous due to system pressure and electrical components. Only communication wiring, humidistat or relative humidity sensor and trained and qualified service personnel should install, repair, or indoor and outdoor air quality. All field control wiring that service air-conditioning equipment. connects to the RTU--MP must be routed through the raceway built Untrained personnel can perform the basic maintenance functions into the corner post as shown in Fig. 2. The raceway provides the of cleaning coils and filters and replacing filters. All other UL required clearance between high--and low--voltage wiring. operations should be performed by trained service personnel. Pass the control wires through the hole provided in the corner post, When working on air-conditioning equipment, observe precautions then feed the wires thorough the raceway to the RTU--MP. in the literature, tags and labels attached to the unit, and other Connect the wires to the removable Phoenix connectors and then safety precautions that may apply. reconnect the connectors to the board. Follow all safety codes. Wear safety glasses and work gloves. NOTE: For rooftop unit installation, refer to base unit installation instructions. Recognize safety information. This is the safety--alert symbol . When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. ! WARNING Understand the signal words DANGER, WARNING, and CAUTION. These words are used with the safety--alert symbol. ELECTRICAL SHOCK HAZARD DANGER identifies the most serious hazards which will result in Failure to follow this warning could cause personal severe personal injury or death. WARNING signifies a hazard injury, death and/or equipment damage. which could result in personal injury or death. CAUTION is used Disconnect electrical power and use lock--out tags to identify unsafe practices which may result in minor personal before wiring the RTU--MP controller. injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation. Field--Supplied Hardware The RTU--MP controller is configurable with the following ! WARNING field-supplied sensors: NOTE: Supply air temperature sensor (33ZCSENSAT) is ELECTRICAL SHOCK HAZARD factory--installed. Failure to follow this warning could cause personal S space temperature sensor 33ZCT55SPT, 33ZCT56SPT, or injury, death and/or equipment damage. 33ZCT59SPT Disconnect all power to the unit before performing S indoor air quality sensor (33ZCSENCO2, 33ZCT55CO2, maintenance or service. Unit may automatically start if power is not disconnected. 33ZCT56CO2, ) required only for demand control ventilation. A dedicated 24-vac transformer is required. S outdoor air quality sensor (33ZCTSENCO2) required only for GENERAL demand control ventilation The RTU--MP controller is an integrated component of the Carrier S CO2 aspirator box (C33ZCCASPCO2) required for CO2 return rooftop unit. Its internal application programming provides duct/outside air applications optimum performance and energy efficiency. RTU--MP enables the unit to run in 100% stand--alone control mode or it can S outdoor air temperature sensor (33ZCSENOAT) communicate to the Building Automation System (BAS). (factory supplied with Economizer) On--board DIP switches allow you to select your protocol (and S outdoor air enthalpy switch (33CSENTHSW) baud rate) of choice among the four most popular protocols in use S return air enthalpy sensor (33CSENTSEN) today: BACnet, Modbus, Johnson N2 and LonWorks. (See Fig. 19.) S space relative humidity sensor (33ZCSENSRH--01) Carrier’s diagnostic display tools such as BACview6 Handheld or S outdoor relative humidity (332CSENORH--01) Virtual BACview can be used with the RTU--MP controller. S humidistat (TSTATCCPLH01--B) Access is available via a 5--pin J12 access port. S filter status switch (33CSFS----01) S fan status switch (33CSAS----01 or field supplied rated at 24 VAC dry contact CRSTATUS001A00) User Interface S BACview6 Handheld S Virtual BACview For specific details about sensors, refer to the literature supplied with the sensor. 2 RTU--MP C07467 Fig. 1 -- RTU--MP Control Module 3 Table 1 – RTU--MP Controller Inputs and Outputs POINT NAME BACnet OBJECT NAME TYPE OF I/O CONNECTION PIN NUM- BERS INPUTS Space Temperature Sensor sptsens AI (10K Thermistor) J 2 0 --- 1 , 2 Supply Air Temperature sat AI (10K Thermistor) J 2 --- 1 , 2 Local Outside Air Temperature Sensor oatsens AI (10K Thermistor) J 2 --- 3 , 4 Space Temperature Offset Pot sptopot AI (100K Potentiometer) J 2 0 --- 3 Indoor Air Quality iaq A I ( 4 --- 2 0 m a ) J 4 --- 2 , 3 Outdoor Air Quality oaq A I ( 4 --- 2 0 m a ) J 4 --- 5 , 6 Safety Chain Feedback safety DI (24 VAC) J 1 --- 9 Compressor Safety compstat DI (24 VAC) J 1 --- 2 Fire Shutdown firedown DI (24 VAC) J 1 --- 1 0 Enthalpy Switch enthalpy DI (24 VAC) J 2 --- 6 , 7 Humidistat Input Status humstat DI (24 VAC) J 5 --- 7 , 8 CONFIGURABLE INPUTS* Space Relative Humidity sprh A I ( 4 --- 2 0 m a ) J 4 --- 2 , 3 o r J 4 --- 5 , 6 Outside Air Relative Humidity oarh A I ( 4 --- 2 0 m a ) Supply Fan Status fanstat DI (24 VAC) J 5 --- 1 , 2 o r J 5 --- 3 , 4 o r Filter Status filtstat DI (24 VAC) J5 5,6 or J5---7,8 RTU--MP Remote Occupancy Input remocc DI (24 VAC) OUTPUTS Economizer Commanded econocmd 4 --- 2 0 m a J 2 --- 5 Position SupplyFanRelayState sf DO Relay (24VAC , 1A) J 1 --- 4 Compressor 1 Relay State comp_1 DO Relay (24VAC , 1A) J 1 --- 8 Compressor 2 Relay State comp_2 DO Relay (24VAC , 1A) J 1 --- 7 Heat Stage 1 Relay State heat_1 DO Relay (24VAC , 1A) J 1 --- 6 Heat Stage 2 Relay State heat_2 DO Relay (24VAC , 1A) J 1 --- 5 Power Exhaust Relay State aux_2 DO Relay (24VAC , 1A) J 1 1 --- 3 Dehumidification Relay State humizer DO Relay (24VAC, 1A) J 1 1 --- 7 , 8 LEGEND AI --- An a l o g In p u t AO --- An a l o g Ou t p u t DI --- D isc r e t e In p u t DO --- Discrete Output *These inputs (if installed) take the place of the default input on the specific channel according to schematic. Pa r a l l e l p in s J 5 --- 1 = J 2 --- 6 ,