Carrier 50HCQA- Manual

7 A-B 0.5” (13) B-C 1.0” (25) A-C 1.0” (25) MAXIMUM ALLOWABLE DIFFERENCE IN. (MM) C06110 Fig. 4 -- Unit Leveling Tolerances Step 5 — Field Fabricate Ductwork Cabinet return-air static pressure (a negative condition) shall not exceed 0.35 in. wg (87 Pa) with economizer or 0.45 in. wg (112 Pa) without...

8 C06005 UNIT MAX WEIGHT DIMENSIONS A B C LB KG IN MM IN MM IN MM 50HCQA04 725 330 74.5 1890 38.5 980 33.5 850 50HCQA05 845 384 74.5 1890 37.5 955 41.5 1055 50HCQA06 900 409 74.5 1890 37.5 955 41.5 1055 NOTES : 1. Dimensions in ( ) are in millimeters.2. Hook rigging shackles through holes in base ra...

9 Step 8 — Install Outside Air Hood Economizer Hood Removal and Setup -- Factory Option — 1. The hood is shipped in knock--down form and located in the return air compartment. It is attached to the economizer using two plastic tie--wraps. 2. To gain access to the hood, remove the filter access panel...

10 Economizer Hood and Two--Position Hood —NOTE : If the power exhaust accessory is to be installed on the unit, the hood shipped with the unit will not beused and must be discarded. Save the aluminum filter for use in the power exhaust hood assembly. 1. The indoor coil access panel will be used as ...

11 NOTE: Trap should be deep enough to offset maximum unit static difference. A 4” (102) trap is recommended . MINIMUM PITCH 1” (25mm) PER 10’ (3m) OF LINE BASE RAIL OPEN VENT TO ROOF DRAIN DRAIN PLUG ROOF CURB SEE NOTE 2 ˝ (51) MIN C08022 Fig. 14 -- Condensate Drain Piping Details All units must ha...

12 Units with Factory--Installed Disconnect — The factory--installed option disconnect switch is located in a weatherproof enclosure located under the main control box. The manual switch handle is accessible through an opening in the access panel. Discard the factory test leads (see Fig. 16). Units ...

15 RACEWAY HOLE IN END PANEL (HIDDEN) C08027 Fig. 22 -- Field Control Wiring Raceway Electric Heaters 50HCQ units may be equipped with field--installed accessory electric heaters. The heaters are modular in design, with heater frames holding open coil resistance wires strung through ceramic insulato...

16 TRACK FLANGE C08135 Fig. 25 -- Typical Module Installation Single Point Boxes and Supplementary Fuse When the unit MOCP device value exceeds 60--A, unit--mounted supplementary fuses are required for each heater circuit. These fuses are included in accessory Single Point Boxes, with power distribu...

17 PremierLink t (Factory--Option) C08199 Fig. 28 -- PremierLink Controller The PremierLink controller (see Fig. 28) is compatible with Carrier Comfort Network r (CCN) devices. This control is designed to allow users the access and ability to change factory--defined settings, thus expanding the func...

19 Outdoor Air Temperature (OAT) Sensor — The OAT is factory--mounted in the EconoMi$er2 (FIOP or accessory). It is a nominal 10k ohm thermistor attached to an eyelet mounting ring. EconoMi$er t 2 — The PremierLink control is used with EconoMi$er2 (option or accessory) for outdoor air management. Th...

20 G J4-12 J4-10 J4-8 Y1 Y2 2 R R 4 6 J4-6 J4-4 W2 C 8 10 C SPACETHERMOSTAT PL CTBTHERMOSTAT W1 TB1 CTBTHERMOSTAT C08119 Fig. 35 -- Space Thermostat Connections Table 3 – PremierLink Sensor Usage APPLICATION OUTDOOR AIR TEMPERATURE SENSOR RETURN AIR TEMPERATURE SENSOR OUTDOOR AIR ENTHALPY SENSOR RET...

22 If the 50HCQ unit has an economizer system and free--cooling operation is required, a sensor representing Return Air Temperature must also be connected (field--supplied and installed). This sensor may be a T--55 Space Sensor (see Fig. 31) installed in the space or in the return duct, or it may be...

25 signal pins must be wired to the signal ground pins. Wiring connections for CCN must be made at the 3--pin plug. At any baud (9600, 19200, 38400 baud), the number of controllers is limited to 239 devices maximum. Bus length may not exceed 4000 ft, with no more than 60 total devices on any 1000--f...

28 Table 8 – RTU--MP Controller Inputs and Outputs POINT NAME BACnet OBJECT NAME TYPE OF I/O CONNECTION PIN NUMBERS INPUTS Space Temperature Sensor sptsens AI (10K Thermistor) J20 --- 1, 2 Supply Air Temperature sat AI (10K Thermistor) J2 --- 1, 2 Local Outside Air Temperature Sensor oatsens AI (10K...

29 Field Connections Field connections for accessory sensors and input devices are made the RTU--MP, at plugs J1, J2, J4, J5, J11 and J20. All field control wiring that connects to the RTU--MP must be routed through the raceway built into the corner post as shown in Fig. 22. The raceway provides the...

31 Input 8 or 9 is recommended for easy of installation. Refer to Fig. 47 and Fig. 49 for wire terminations at J5. Remote Occupancy: The remote occupancy accessory is a field--installed accessory. This accessory overrides the unoccupied mode and puts the unit in occupied mode. When installing this a...

33 Table 9 – LEDs The LEDs on the RTU--MP show the status of certain functions If this LED is on... Status is... Power The RTU MP has power Rx The RTU MP is receiving data from the network segment Tx The RTU MP is transmitting data over the network segment DO# The digital output is active The Run an...

34 Duct smoke sensor controller Fastener (2X) Controller cover Conduit nuts (supplied by installer) Conduit support plate Cover gasket (ordering option) Conduit couplings (supplied by installer) Terminal block cover Controller housing and electronics Alarm Power Test/resetswitch Trouble C08208 Fig. ...

35 location and the tubing to the sampling tube be connected. See “ Completing Installation of Return Air Smoke Sensor :” for details.) Return Air Detector Sampling Tube Controller module Return Air Detector module(shipping position shown)* *RA detector must be moved from shipping position to operat...

36 Table 10 – Unit Wire/Fuse or HACR Breaker Sizing Data UN IT N O M .V --- P h --- H Z IF M TY P E ELEC. HTR P.E. NO C.O. or UNPWR C.O. CRHEATER*** NOM (KW) FLA FLA NO P.E. w/P.E. (pwrd fr/unit) MCA FUSE or HACR BRKR DISC. SIZE MCA FUSE or HACR BRKR DISC. SIZE FLA LRA FLA LRA 50H CQ A04 208/ 230 --...

42 Legend and Notes for Table 10 LEGEND: BRKR --- Circuit breaker CO --- Convenient outlet DD --- Direct drive indoor fan motor DISC --- Disconnect FLA --- Full load amps IFM --- Indoor fan motor LRA --- Locked rotor amps MCA --- Minimum circuit amps PE --- Power exhaust PWRD CO --- Powered convenie...

43 Step 12 — Install Accessories Available accessories include: Roof CurbThru--base connection kit (must be installed before unit is set on curb)Manual outside air damperTwo--Position motorized outside air damperEconoMi$er IV (with control and integrated barometric relief)EconoMi$er2 (without contro...