Carrier 50TC Instruction manual

50TC---D Single Package Rooftop, 50Hz Cooling Only with Puronr (R --- 410A) Refrigerant Sizes: 17, 20, 24, 28, 30 Installation Instructions NOTE: Read the entire instruction manual before starting the installation TABLE OF CONTENTS SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 2 Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Unit without Thru-- Base Connection Kit . . . . . . . 20 Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . . . 9 Roof Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Step 2 - Plan for Sequence of Unit Installation . . . . . 13 Curb-- Mount Installation . . . . . . . . . . . . . . . . . . . . 13 Pad-- Mount Installation . . . . . . . . . . . . . . . . . . . . . 13 Frame-- Mount Installation . . . . . . . . . . . . . . . . . . . 13 Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . . 13 Roof Curb Mount . . . . . . . . . . . . . . . . . . . . . . . . . 13 Slab Mount (Horizontal Units Only) . . . . . . . . . . 13 Heat Anticipator Settings . . . . . . . . . . . . . . . . . . . 21 Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Low-- Voltage Control Connections . . . . . . . . . . . . 21 PremierLinkt (Factory Option) . . . . . . . . . . . . . . . 22 Supply Air Temperature (SAT) Sensor . . . . . . . . . 24 Outdoor Air Temperature (OAT) Sensor . . . . . . . 24 EconoMi$er2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Space Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Connect Thermostat . . . . . . . . . . . . . . . . . . . . . . . 26 Configure the Unit for Thermostat Mode . . . . . . 26 Alternate Unit Support (In Lieu of Curb or Slab Mount) . . . . . . . . . . . . . 13 Economizer Controls . . . . . . . . . . . . . . . . . . . . . . . . 27 Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . . . 14 Outdoor Air Quality Sensor . . . . . . . . . . . . . . . . . 27 For Units with Accessory Electric Heaters . . . . . 14 Smoke Detector/Fire Shutdown (FSD) . . . . . . . . . 28 Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . . 14 Filter Status Switch . . . . . . . . . . . . . . . . . . . . . . . . 28 Positioning on Curb . . . . . . . . . . . . . . . . . . . . . . . 14 Supply Fan Status Switch . . . . . . . . . . . . . . . . . . . 28 Step 7 - Horizontal Duct Connection . . . . . . . . . . . . 15 Remote Occupied Switch . . . . . . . . . . . . . . . . . . . 28 Step 8 - Install Outside Air Hood — Factory Option . . 16 Power Exhaust (output) . . . . . . . . . . . . . . . . . . . . . 28 Step 9 - Check Pulley Alignment and Belt Tension . . . 17 Space Relative Humidity Sensor . . . . . . . . . . . . . 29 Pulley Alignment . . . . . . . . . . . . . . . . . . . . . . . . . 17 CCN Communication Bus . . . . . . . . . . . . . . . . . . 29 Belt Tension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 RTU Open Control System . . . . . . . . . . . . . . . . . . . 30 Step 10 - Install External Condensate Trap and Line . . 18 Supply Air Temperature (SAT) Sensor . . . . . . . . . 32 Step 11 - Make Electrical Connections . . . . . . . . . . . 18 Outdoor Air Temperature (OAT) Sensor . . . . . . . 32 Indoor Air Quality (CO2) Sensor . . . . . . . . . . . . . 27 Units without Factory-- Installed Disconnect . . . . 19 EconoMi$er2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Units with Factory-- Installed Disconnect . . . . . . . 19 Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 33 All Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Space Temperature (SPT) Sensors . . . . . . . . . . . . 33 Factory-- Option Thru-- Base Connections . . . . . . 20 Indoor Air Quality (CO2) Sensor . . . . . . . . . . . . . 33 Units without Thru-- Base Connections . . . . . . . . . 20 Outdoor Air Quality Sensor . . . . . . . . . . . . . . . . . 34 Field Control Wiring . . . . . . . . . . . . . . . . . . . . . . . 20 Connecting Discrete Inputs . . . . . . . . . . . . . . . . . . 34 Communication Wiring - Protocols . . . . . . . . . . . . 35 ! General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Local Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could cause personal injury or death. Before performing service or maintenance operations on unit, always turn off main power switch to unit and install lock(s) and lockout tag(s). Unit may have more than one power switch. RTU Open Troubleshooting . . . . . . . . . . . . . . . . . 36 Outdoor Air Enthalpy Control . . . . . . . . . . . . . . . . . 37 Differential Enthalpy Control . . . . . . . . . . . . . . . . 37 Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Return Air Sensor Tube Installation . . . . . . . . . . . 38 Test/Rest Magnet . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Additional Application Data . . . . . . . . . . . . . . . . . 39 ! Step 12 - Adjust Factory-- Installed Options . . . . . . . . 42 50TC-- D Step 13 - Install Accessories . . . . . . . . . . . . . . . . . . . 42 WARNING UNIT OPERATION AND SAFETY HAZARD Failure to follow this warning could cause personal injury, death and/or equipment damage. Puronr (R-- 410A) refrigerant systems operate at higher pressures than standard R-- 22 systems. Do not use R-- 22 service equipment or components on Puron refrigerant equipment. START-- UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . 43 SAFETY CONSIDERATIONS Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock or other conditions which may cause personal injury or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory-- authorized kits or accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories when installing. ! WARNING PERSONAL INJURY AND ENVIRONMENTAL HAZARD Failure to follow this warning could cause personal injury or death. Relieve pressure and recover all refrigerant before system repair or final unit disposal. Wear safety glasses and gloves when handling refrigerants. Keep torches and other ignition sources away from refrigerants and oils. Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloths for brazing operations and have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions attached to the unit. Consult local building codes for special requirements. In absence of local codes, it is recommended that the USA standard ANSI/NFPA 70, National Electrical Code (NEC), be followed. ! It is important to recognize safety information. This is the . When you see this symbol on the safety-- alert symbol unit and in instructions or manuals, be alert to the potential for personal injury. CAUTION CUT HAZARD Failure to follow this caution may result in personal injury. Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts and servicing air conditioning units. Understand the signal words DANGER, WARNING, CAUTION, and NOTE. These words are used with the safety-- alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices, which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation. 2 50TC-- D Fig. 1 - Unit Dimensional Drawing – 17 and 20 Size Units 3 C101023 50TC-- D Fig. 1 - Unit Dimensional Drawing – 17 and 20 Size Units (cont.) 4 C11328 50TC-- D Fig. 2 - Unit Dimensional Drawing – 24 and 28 Size Units 5 C101025 50TC-- D Fig. 2 - Unit Dimensional Drawing – 24 and 28 Size Units (cont.) 6 C11329 50TC-- D Fig. 3 - Unit Dimensional Drawing – 30 Size Units 7 C11225 50TC-- D Fig. 3 - Unit Dimensional Drawing – 30 Size Units (cont.) 8 C11235 INSTALLATION NOTE: Consider also the effect of adjacent units. Unit may be installed directly on wood flooring or on Class A, B, or C roof-- covering material when roof curb is used. Complete the following checks before installation. 1. Consult local building codes or the U.S.A. National Electrical Code (Ref: ANSI/NFPA 70, [American National Standards Institute/National Fire Protection Association], latest revision) for special installation requirements 2. Determine unit location (from project plans) or select unit location. 3. Check for possible overhead obstructions which may interfere with unit lifting or rigging. Step 1 — Plan for Unit Location Select a location for the unit and its support system (curb or other) that provides for the minimum clearances required for safety. This includes the clearance to combustible surfaces, unit performance and service access below, around and above unit as specified in unit drawings. See Fig. 4. Do not install unit in an indoor location. Do not locate air inlets near exhaust vents or other sources of contaminated air. Although unit is weatherproof, avoid locations that permit water from higher level runoff and overhangs to fall onto the unit. Select a unit mounting system that provides adequate height to allow installation of condensate trap per requirements. Refer to Step 10 — Install External Condensate Trap and Line – for required trap dimensions. Roof Mount — Check building codes for weight distribution requirements. Unit operating weight is shown in Table 1. 2438 mm (96 in) 914 mm (36 in) 1067 mm (42 in) 914 mm (36 in) 1067 mm (42 in) C101074 Fig. 4 - Service Clearance Dimensional Drawing Table 1 – Operating Weights 50TC ---D UNIT KG (LB) 17 20 24 28 30 Base Unit 820 (1808) 827 (1823) 895 (1973) 952 (2098) 998 (2196) Economizer 111 (245) 111 (245) 111 (245) 111 (245) 111 (245) Curb 356 mm/14--- in 95 (210) 95 (210) 112 (246) 112 (246) 123 (270) 610 mm/24--- in 132 (290) 132 (290) 140 (308) 140 (308) 155 (342) 9 50TC-- D Jobsite Survey 50TC-- D Fig. 5 - Roof Curb Details – 17 and 20 Size Units 10 C09139A 50TC-- D Fig. 6 - Roof Curb Details – 24 and 28 Size Units 11 C09140A 50TC-- D Fig. 7 - Roof Curb Details – 30 Size Unit 12 C11251 The support method used for this unit will dictate different sequences for the steps of unit installation. For example, on curb-- mounted units, some accessories must be installed on the unit before the unit is placed on the curb. Review the following for recommended sequences for installation steps. Curb should be level. This is necessary for unit drain to function properly. Unit leveling tolerances are show in Fig. 8. Refer to Accessory Roof Curb Installation Instructions for additional information as required. Curb-- mounted installation — Install curb Install field-- fabricated ductwork inside curb Install thru-- base service connection fittings (affects curb and unit) Rig and place unit Remove top skid Install outside air hood Install smoke detector tube Install condensate line trap and piping Make electrical connections Install other accessories Pad-- mounted installation — Prepare pad and unit supports Rig and place unit Remove duct covers and top skid Install Return Air smoke detector sensor tube Install field-- fabricated ductwork at unit duct openings Install outside air hood Install condensate line trap and piping Make electrical connections Install other accessories C MAXIMUM ALLOWABLE DIFFERENCE MM (IN.) A B A-B 6 (0.25”) B-C 12 (0.5”) A-C 12(0.5” ) Fig. 8 - Unit Leveling Tolerances C09386 Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb and not to the unit. Thru-- the-- base power connection must be installed before the unit is set on the roof curb. If electric and control wiring is to be routed through the basepan, remove knockouts in basepan located in control box area of access panel; see Figs. 1, 2 or 3 for basepan knockout locations. Attach the service connections to the basepans. Hood Carton Location (rear access panel) Control Box Access Panel Frame-- mounted installation — Frame-- mounted applications generally follow the sequence for a curb installation. Adapt as required to suit specific installation plan. Filter and Indoor Coil Access Panel Indoor Blower Access Panel Step 3 — Inspect unit Inspect unit for transportation damage. File any claim with transportation agency. Confirm before installation of unit that voltage, amperage and circuit protection requirements listed on unit data plate agree with power supply provided. Electric Heat Access Panel Compressor (each side) C11155 Fig. 9 - Typical Access Panel and Compressor Locations Slab Mount (Horizontal Units Only) — Locate the carton containing the outside air hood parts; see Fig. 9 and 13. Do not remove carton until unit has been rigged and located in final position. Provide a level concrete slab that extends a minimum of 152 mm (6–in.) beyond unit cabinet. Install a gravel apron in front of condenser coil air inlet to prevent grass and foliage from obstructing airflow. Step 4 — Provide Unit Support NOTE: Horizontal units may be installed on a roof curb if required. Roof Curb Mount — Accessory roof curb details and dimensions are shown in Figs. 5, 6 and 7. Assemble and install accessory roof curb in accordance with instructions shipped with the curb. NOTE: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasket supplied with the roof curb as shown in Figs. 5, 6 and 7. Improperly applied gasket can also result in air leaks and poor unit performance. Alternate Unit Support (In Lieu of Curb or Slab Mount) — A non--combustible sleeper rail can be used in the unit curb support area. If sleeper rails cannot be used, support the long sides of the unit with a minimum of 4 equally spaced 102 mm x 102 mm (4--in. x 4--in.) pads on each side. Locate pads so that they support the rails. Make sure to avoid the fork openings. 13 50TC-- D Step 2 — Plan for Sequence of Unit Installation Step 5 — Field Fabricate Ductwork Step 6 — Rig and Place Unit Cabinet return-air static pressure (a negative condition) shall not exceed 87 Pa (0.5 in. wg) with economizer or without economizer. Keep unit upright and do not drop. Spreader bars are not required if top crating is left on unit. Rollers may be used to move unit across a roof. Level by using unit frame as a reference. See Table 1 (on page 7) and Fig. 10 for additional information. For vertical ducted applications, secure all ducts to roof curb and building structure. Do not connect ductwork to unit. Fabricate supply ductwork so that the cross sectional dimensions are equal to or greater than the unit supply duct opening dimensions for the first 458 mm (18 in.) of duct length from the unit basepan. Lifting holes are provided in base rails as shown in Fig. 10. Refer to rigging instructions on unit. ! 50TC-- D Insulate and weatherproof all external ductwork, joints, and roof openings with counter flashing and mastic in accordance with applicable codes. UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage. All panels must be in place when rigging. Unit is not designed for handling by fork truck when packaging is removed. Ducts passing through unconditioned spaces must be insulated and covered with a vapor barrier. If a plenum return is used on a vertical unit, the return should be ducted through the roof deck to comply with applicable fire codes. For Units with Accessory Electric Heaters — Minimum clearance is not required around ductwork. ! WARNING PERSONAL INJURY HAZARD Failure to follow this warning could cause personal injury. For vertical supply and return units, tools or parts could drop into ductwork and cause an injury. Install a 90-- degree turn in the return ductwork between the unit and the conditioned space. If a 90-- degree elbow cannot be installed, then a grille of sufficient strength and density should be installed to prevent objects from falling into the conditioned space. Due to electric heater, supply duct will require 90-- degree elbow. CAUTION Before setting the unit onto the curb, recheck gasketing on curb. Positioning on Curb — Position unit on roof curb so that the following clearances are maintained: 6 mm (1/4 in.) clearance between the roof curb and the base rail inside the right and left, 12 mm (1/2 in.) clearance between the roof curb and the base rail inside the front and back. This will result in the distance between the roof curb and the base rail being approximately equal to Detail A and Detail B in Figs. 5, 6 and 7. Do not attempt to slide unit on curb after unit is set. Doing so will result in damage to the roof curb seal. Although unit is weatherproof, guard against water from higher level runoff and overhangs. After unit is in position, remove rigging skids and shipping materials. 14 PLACE ALL SEAL STRIP IN PLACE BEFORE PLACING UNIT ON ROOF CURB. 1371 mm (54") MINIMUM "B" SEE DETAIL A DETAIL A DUCT END "C" "A" C11378 MAX WEIGHT DIMENSIONS B A C KG LB MM IN MM IN MM IN 50TC---D17 1011 2228 3249 127.8 1491 58.7 1328 52.3 50TC---D20 1017 2243 3249 127.8 1491 58.7 1328 52.3 50TC---D24 1033 2277 3595 141.5 1816 71.5 1328 52.3 50TC---D28 1145 2525 3595 141.5 1816 71.5 1532 60.3 50TC---D30 1295 2849 4007 157.8 2040 80.3 1532 60.3 NOTES: 50TC-- D UNIT 1. Dimensions in ( ) are in inches. 2. Hook rigging shackles through holes in base rail, as shown in detail “A.” Holes in base rails are centered around the unit center of gravity. Use wooden top to prevent rigging straps from damaging unit. Fig. 10 - Rigging Details Step 7 — Horizontal Duct Connection Refer to Figs. 1, 2 and 3 for locations and sizes of the horizontal duct connections. Note that there are two different return air duct connection locations – one for unit without an economizer (on back side of unit) and a different one for unit equipped with an economizer (on left end, under the economizer hood). The supply air duct connection is on the back side. See Fig. 11 for top view depicting typical horizontal duct arrangements. Field--supplied 19 mm (3/4- in) flanges should be attached to horizontal duct openings (see Fig. 11) and all ductwork should be secured to the flanges. Insulate and weatherproof all external ductwork, joints, and roof or building openings with counter flashing and mastic in accordance with applicable codes. Horizontal Supply Air Return Air Duct without Economizer Return Air Duct with Economizer C10740 Supply Return without Economizer Return with Economizer Location Back Back Left end Height --- mm (In.) 402 (157/8) 1253 (493/8) 467 (183/8) Width --- mm (in.) 756 (293/4) 593 (233/8) 1564 (615/8) Fig. 11 - Horizontal Duct Opening Dimensions 15 Step 8 — Install Outside Air Hood — Factory Option Apply Seal Strips to the back of these surfaces The outside air hood for factory-- option economizer and two-- position damper is shipped in knock-- down form and requires field assembly. The panel for the hood top is shipped on the end of the unit (see Fig. 12). The remaining parts for the hood assembly (including side panels, filters and tracks) are shipped in a carton that is secured to the rear of the blower assembly. Access the carton location through rear panel (see Fig. 13). 3 Apply Seal Strip to the front of this flange Apply Seal Strips to the back of these flanges Apply Seal Strip to the front of this flange 7 7 2 2 4 4 5 4 4 6 1 Seal Strips 5 6 Item # 1 2 3 4 5 6 7 Hood Top Shipping Position Apply Seal Strip to the back of this flange Description Qty Angles 4 Side Plates 2 Hood 1 Outdoor Air Screens 4 Side Filter Supports 2 Side Drip Angles 2 Top Diverters 2 C09079 50TC-- D Fig. 14 - Hood Part Identification and Seal Strip Application Areas To assemble the outside air hood: Fig. 12 - Hood Top – Shipping Position C09134 Hood Package Fig. 13 - Hood Package – Shipping Location C09133 To remove the hood parts package: 1. Remove hood top panel from shipping position on unit end. 2. Install four angles to the upper end panel using the screws provided 3. Apply seal strip to mating flanges on the side plates of the hood (see Fig. 14). 4. Secure side plates to panel using the screws provided. 5. Apply seal strip to mating flange of the hood (see Fig. 14). 6. Secure top flange using screws provided in kit. 7. Install outdoor air screens by sliding them into the channel formed by the four angles installed in step 2. Make sure that the screens extend across the entire length of the hood. 8. Install side filter supports using the screws provided 9. Install side drip angles using the screws provided. 10. Run a continuous length of seal strip across the hood covering the engagement holes in the lower hood. 11. Install top diverter using the screws provided. 12. On units with barometric relief, remove screws at bottom of relief damper. Do not discard damper door. 1. Remove the back blower access panel. 2. Locate and cut the strap, being careful to not damage any wiring. 3. Carefully lift the hood package carton through the back blower access opening. See Fig. 14 for identification of the various parts of the hood assembly. Fig. 15 - Hood Assembly – Completed 16 C09090 Step 9 — Check Pulley Alignment and Belt Tension Belt Tension — Pulley Alignment — Check belt tension by using a spring-- force tool (such as Browning’s Part Number “Belt Tension Checker” or equivalent tool); tension should be between 2.3-- 4.5 kg (5-- 10 lbs) with 13.3 mm (5/8 in.) deflection when measured at the centerline of the belt span. This point is at the center of the belt when measuring the distance between the motor shaft and the blower shaft. NOTE: Without the spring-- tension tool, place a straight edge across the belt surface at the pulleys, then deflect the belt at mid-- span using one finger to a 12.7 mm (1/2 in.) deflection. Adjust the belt tension by loosening the four motor rail mounting nuts and bolts where the motor rails bolts to the blower rails. There are two jack bolts and nuts that are used to slide the motor rails to either increase or decrease belt tension. There are locking nuts on the jack bolts that need to be loosened at the motor rail. Turn the jack bolts clockwise or counter clockwise until the correct belt tension is achieved. Ensure the fan shaft and motor shaft are parallel prior to tightening motor plate nuts. (see Fig. 17.) Fig. 16 - Checking Pulley Alignment C07075 To align fan and motor pulleys: 1. Loosen fan pulley setscrews. 2. Slide fan pulley along fan shaft. Make angular alignment by loosening motor from mounting 3. Tighten fan pulley setscrews and motor mounting bolts to torque specifications. 4. Recheck belt tension. Step 1: Loosen motor rail bolts Step 2: Loosen jack bolt lock nuts Step 3: Loosen or tighten jack bolts until proper belt tension is achieved Fig. 17 - Adjusting Belt Tension 17 C11447 50TC-- D The motor pulley is an adjustable-- pitch type that allows implementation of changes in fan wheel speed to match as-- installed ductwork systems. The pulley consists of a fixed flange side that faces the motor (secured to the motor shaft) and a movable flange side that can be rotated around the fixed flange side that increases or reduces the pitch diameter of this driver pulley. (See Fig. 16.) Step 10 — Install External Condensate Trap and Line Step 11 — Make Electrical Connections 50TC-- D CONDENSATE DRAIN CONNECTION WARNING ! The unit has one 19 mm (3/4-in.) condensate drain connection on the end of the condensate pan (see Fig. 18). See Figs. 1, 2 and 3, item “E”, in the view labeled “BACK (HORIZONTAL DISCHARGE W/O ECON)” for the location of the condensate drain connection. ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Do not use gas piping as an electrical ground. Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to unit ground lug in control compartment, or conduit approved for electrical ground when installed in accordance with local electrical codes or in absence of local codes, it is recommended that the U.S.A. standard ANSI/NFPA 70, National Electrical Code (NEC), be followed. NOTE: Field-- supplied wiring shall conform with the limitations of minimum 33_C (63_F) rise. Fig. 18 - Condensate Drain Pan Connection C10729 The piping for the condensate drain and external trap can be completed after the unit is in place. Hand tighten fittings to the drain pan fitting. Provide adequate support for the drain line. Failure to do so can result in damage to the drain pan. See Fig. 19. Field power wires are connected to the unit at line-- side pressure lugs on the terminal block (see Fig. 20 or the wiring diagram label for control box component arrangement) or at factory-- installed option non-- fused disconnect switch. Use copper conductors only. BLK YEL BLU LOAD SIDE MINIMUM PITCH 25 mm (1 in.) PER 3m (10 ft.) OF LINE BASE RAIL OPEN VENT LINE SIDE 76 mm (3 in.) MIN SEE DETAIL A TO ROOF DRAIN SEE NOTE L1 L2 L3 DRAIN PLUG ROOF CURB DETAIL A CONTROL BOX NOTE: Trap should be deep enough to offset maximum unit static difference. A 102 mm (4 in.) trap. is recommended Fig. 19 - Condensate Drain Piping Details Fig. 20 - Location of TB1 C11181 C11354 All units must have an external trap for condensate drainage. Install a trap at least 102 mm (4-in.) deep and protect against freeze-up. If drain line is installed downstream from the external trap, pitch the line away from the unit at 25 mm in 3 m (1-in. per 10 ft) of run. Do not use a pipe size smaller than the unit connection of 19 mm (3/4 -in.). NOTE: Make field power connections directly to line connection pressure lugs only. The unit is factory wired for the voltage shown on the nameplate. Refer to unit label diagram for additional information. 18 ! WARNING ! FIRE HAZARD Failure to follow this warning could result in intermittent operation or performance satisfaction. Do not connect aluminum wire between disconnect switch and air conditioning unit. Use only copper wire. (See Fig. 21.) CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage. Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Carrier warranty. Units Without Disconnect Option ELECTRIC DISCONNECT SWITCH TB COPPER 11 12 13 ALUMINUM WIRE Fig. 21 - Disconnect Switch and Unit 50TC-- D WIRE ONLY Disconnect per NEC A93033 L1 Units Without Factory-- Installed Disconnect — L2 L3 400-3-50 When installing units, provide a disconnect switch of adequate size per local or national wiring code. Disconnect sizing data is provided on the unit informative plate. Locate on unit cabinet or within sight of the unit per national or local codes.. Do not cover unit informative plate if mounting the disconnect on the unit cabinet. Units With Disconnect Option Factory Wiring Units with Factory-- Installed Disconnect — T1 The factory-- installed option disconnect switch is located in the main control box. The manual switch handle is accessible on the corner post adjacent to the control box access panel. T2 T3 Optional Disconnect Switch L1 L2 L3 L1 L2 L3 All Units All field wiring must comply with local codes. Size wire based on MCA (Minimum Circuit Amps) on the unit informative plate. See Fig. 22 for power wiring connections to the unit power terminal block and equipment ground. Maximum wire size is 70.0 mm2 (2/0 AWG) per pole. Fig. 22 - Power Wiring Connections C11381 Table 2 – American/European Wire Conversions AMERICAN Provide a ground--fault and short--circuit over--current protection device (fuse or breaker) per local code (or U.S.A. NEC Article 440). Refer to unit informative data plate for MOCP (Maximum Over--current Protection) device size. EUROPEAN Industry Standard Size American Conversion Size (mm2) Industry Standard Size (mm2) 20 AWG 0.52 0.5 18 AWG 0.82 1.0 Voltage to compressor terminals during operation must be within voltage range indicated on unit nameplate. On 3-- phase units, voltages between phases must be balanced within 2% and the current within 10%. Use the following formula to determine the percent of voltage imbalance. 16 AWG 1.30 1.5 14 AWG 2.08 2.5 12 AWG 3.30 4.0 10 AWG 5.25 6.0 8 AWG 6.36 10.0 6 AWG 13.29 16.0 max voltage deviation from average voltage average voltage 4 AWG 21.14 25.0 3 AWG 26.65 — 2 AWG 33.61 35.0 50.0 % Voltage Imbalance = 100 x C09103 19 1 AWG 42.39 1/0 AWG 53.49 — 2/0 AWG 67.42 70.0 3/0 AWG 85.00 95.0 4/0 AWG 107.9 120.0 Factory-- Option Thru-- Base Connections — All units are equipped with the ability to bring utilities through the base. AWG insulated wire (35_C minimum). All wire sizes larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat. The electrical entrance is located in the control box area can can be accessed through the control box access panel. An embossed area is provided with three knock outs. High voltage is brought through the multi knock out by removing the appropriate size for the size of the fitting required. A 22 mm (7/8- in.) knock out is provided for low voltage. An additional 22 mm (7/8- in.) knock out is provided for a 115 volt line which is used when the unit is equipped with the non--unit powered convenience outlet option. X X C C G G W2 W2 W2 W1 W1 W1 O/B/Y2 Y2 Y2 Y1 Y1 Y1 R R R C See Caution G All required fittings are field supplied. Install fittings when access to both top and bottom of the base pan is available. 50TC-- D Central Terminal Board Typical Thermostat Corrections Units without Thru-- Base Connections — 1. Install liquid tight conduit between disconnect and control box. 2. Pull correctly rated high voltage wires through the conduit. 3. Install power lines to terminal connections as shown in Fig. 22. (see Note) Field Control Wiring — The 50TC--D unit requires an external temperature control device. This device can be a thermostat (field--supplied) or a PremierLink controller (available as factory--installed option or as field--installed accessory, for use on a Carrier Comfort Network or as a stand alone control) or the RTU Open for Building Management Systems using non--CCN protocols (RTU Open is available as a factory--installed option only). T–STAT Note: Typical multi-function marking. Follow manufacturer’s configuration instructions to select Y2. Field Wiring ! UNIT DAMAGE HAZARD Failure to follow this caution may cause a short circuit. Carefully check the connection of control coductor for indoor fan control at terminal G. Connecting the indoor fan lead to terminal C will cause a short circuit condition which can cause component damage inside the unit or at thermostat. Thermostat — Select a Carrier-- approved accessory thermostat. When electric heat is installed in the 50TC unit, the thermostat must be capable of energizing the G terminal (to energize the Indoor Fan Contactor) whenever there is a space call for heat (energizing the W1 terminal). The accessory thermostats listed on the unit price pages can provide this signal but they are not configured to enable this signal as shipped. Install the accessory thermostat according to installation instructions included with the accessory. Locate the thermostat accessory on a solid wall in the conditioned space to sense average temperature in accordance with the thermostat installation instructions. If the thermostat contains a logic circuit requiring 24-- v power, use a thermostat cable or equivalent single leads of different colors with minimum of seven leads. If the thermostat does not require a 24-- v source (no “C” connection required), use a thermostat cable or equivalent with minimum of six leads. Check the thermostat installation instructions for additional features which might require additional conductors in the cable. For wire runs up to 15 m (50 ft.), use no. 18 AWG (American Wire Gage) insulated wire (35_C minimum). For 15 to 23 m5 (0 to 75 ft.), use no. 16 AWG insulated wire (35_C minimum). For over 23 m (75 ft.), use no. 14 CAUTION C10731 Fig. 23 - Typical Low-- Voltage Control Connections Unit without Thru-- Base Connection Kit — Correctly rated low voltage wire can be routed through the rubber grommet located on the corner post adjacent to the control box access panel. Route wire through the grommet and then route the wire behind the corner post utilizing the factory provided wire ties secured to the control box. This will insure separation of the field low voltage wire and the high voltage circuit. Route the low voltage wire to the central terminal board. See Fig. 24. NOTE: If utilizing the through the base connections, route the low voltage wire through the wire ties to the central terminal board. Configure for Electric Heat: To configure the factory-- approved thermostat, open the Advanced Setup menu, scroll down to ELECTRIC HEAT and change RANGE value from OFF to ON. Consult the thermostat installation instructions for full details. 20 Heat Anticipator Settings — Indoor Blower Access Panel Set heat anticipator settings at 0.14 amp for the first stage and 0.14 amp for second-- stage heating. Rubber Grommet Main Control Box Corner Post Filter Area Heater Module Fig. 26 - Typical Component Location C10632 50TC-- D Electric Heater Tracks Wire Ties Thru the Base Connection Fig. 24 - Field Control Wiring Raceway Electric Heater Opening C10734 Fig. 27 - Electric Heater Compartment\ (Cover Removed) Electric Heaters 50TC--D units may be equipped with field--installed accessory electric heaters. The heaters are modular in design. Heater modules are installed in the compartment below the indoor blower access panel. Access is through the electric heat access panel. Heater modules slide into the compartment on tracks along the bottom of the heater opening. See Fig. 25 Fig. 26 and Fig. 27. Refer to the Electric Heater Kit Installation Instructions for complete details. Low-- Voltage Control Connections — Locate the plug assembly in the electric heater section of the main unit. Connect the plug with the mating low voltage plug located on the heater. CTB CONTL BOARD Control Box Access Panel 2 VIO 3 ORN 12 BRN Plug Assembly Filter and Indoor Coil Access Panel C09142 ORN VIO BRN 1 2 3 VIO VIO Field Connections Indoor Blower Access Panel BRN BRN Electric Heat Access Panel Fig. 25 - Typical Access Panel Location Elec Htr VIO HR2 C10631 VIO Not all available heater modules may be used in every unit. Use only those heater modules that are approved for use in a specific size unit. Refer to the label on the unit cabinet for the list of approved heaters. HR1 BRN BRN HR1: On Heater 1 in Position #1 HR2: On Heater 2 in Position #2 (if installed) C09149 Fig. 28 - Accessory Electric Heater Control Connections 21 50TC-- D PremierLinkt (Factory--Option) Fig. 29 - PremierLink Controller C08199 The PremierLink controller (see Fig. 29) is compatible with Carrier Comfort Networkr (CCN) devices. This control is designed to allow users the access and ability to change factory-- defined settings, thus expanding the function of the standard unit control board. CCN service access tools include System Pilott, Touch Pilott and Service Tool. (Standard tier display tools Navigatort and Scrolling Marquee are not suitable for use with latest PremierLink controller (Version 2.x).) The PremierLink control is factory-- mounted in the 50TC-- D unit’s main control box to the right of the Control Terminal Board (CTB) (see Fig. 30). Factory wiring is completed through harnesses connected to the CTB thermostat. Field connections are made at a 16-- pole terminal block (TB3) located at the top of the unit control box in front of the PremierLink controller. The factory-- installed PremierLink control includes the supply-- air temperature (SAT) sensor. The outdoor air temperature (OAT) sensor is included in the FIOP/accessory EconoMi$ert2 package. The PremierLink controller requires the use of electronic thermostat or a CCN connection broadcast to initiate its internal timeclock. necessary for broadcast of time of day (occupied/unoccupied). a Carrier for time This is functions NOTE: PremierLink controller is shipped in Sensor mode. To be used with a thermostat, the PremierLink controller must be configured to Thermostat mode. Refer to PremierLink Configuration instructions for Operating Mode. C10635 Fig. 30 - 50TC-- D Control Box Component Locations 22 50TC-- D Fig. 31 - PremierLink Wiring Schematic 23 C101075 Supply Air Temperature (SAT) Sensor — NOTE: The sensor must be mounted in the discharge airstream downstream of the cooling coil and any heating devices. Be sure the probe tip does not come in contact with any of the unit’s heater surfaces. On FIOP-- equipped 50TC-- D unit, the unit is supplied with a supply-- air temperature (SAT) sensor (33ZCSENSAT). This sensor is a tubular probe type, approx 152 mm (6-- inches) in length. It is a nominal 10-- k ohm thermistor. Outdoor Air Temperature (OAT) Sensor — The OAT is factory-- mounted in the EconoMi$er2 (FIOP or accessory). It is a nominal 10k ohm thermistor attached to an eyelet mounting ring. The SAT is factory--wired. The SAT probe is mounted in the fan deck (see Fig. 32). It can be removed or remounted per local codes.. Drill or punch a 13 mm (1/2--in.) hole in the flange or duct. Use two field--supplied, self--drilling screws to secure the sensor probe in a horizontal orientation. Insure that the sensor wires do not contact the hot surface of the electric heaters. EconoMi$er2 — The PremierLink control is used with EconoMi$er2 (option or accessory) for outdoor air management. The damper position is controlled directly by the PremierLink control; EconoMi$er2 has no internal logic device. 50TC-- D Outdoor air management functions can be enhanced with field-- installation of these accessory control devices: Enthalpy control (outdoor air or differential sensors) Space CO2 sensor Outdoor air CO2 sensor SUPPLY AIR TEMPERATURE SENSOR Refer to Table 3 for accessory part numbers. ROOF CURB SUPPLY AIR Field Connections RETURN AIR Fig. 32 - Mounting Location for Supply Air Temperature (SAT) Sensor on 50TC-- D Units Field connections for accessory sensor and input devices are made at the 16-- pole terminal block (TB3, see Fig. 31) located on the control box top in front of the PremierLink control . Some input devices also require a 24-- vac signal source; connect at CTB terminal R at “THERMOSTAT” connection strip for this signal source. See connections figures on following pages for field connection locations (and for continued connections at the PremierLink board inputs). C10733 NOTE: Refer to Form 33CS-- 68SI for complete PremierLink configuration, operating sequences and troubleshooting information. Have a copy of this manual available at unit start-- up. Table 4 provides a summary of field connections for units equipped with Space Sensor. Table 5 provides a summary of field connections for units equipped with Space Thermostat. Table 3 – PremierLink Sensor Usage APPLICATION OUTDOOR AIR TEMPERATURE SENSOR RETURN AIR TEMPERATURE SENSOR OUTDOOR AIR ENTHALPY SENSOR RETURN AIR ENTHALPY SENSOR Differential Dry Bulb Temperature with PremierLink (PremierLink requires 4---20 mA Actuator) Included --CRTEMPSN001A00 Required --33ZCT55SPT or equivalent --- --- Single Enthalpy with PremierLink (PremierLink requires 4---20mA Actuator) Included --Not Used --- Requires --33CSENTHSW --- Differential Enthalpy with PremierLink (PremierLink requires 4---20mA Actuator) Included --Not Used --- Requires --33CSENTHSW or equivalent Requires --33CSENTSEN or equivalent NOTES: CO2 Sensors (Optional): 33ZCSENCO2 --- Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor. 33ZCASPCO2 --- Aspirator box used for duct--- mounted CO2 room sensor. 33ZCT55CO2 --- Space temperature and CO2 room sensor with override. 33ZCT56CO2 --- Space temperature and CO2 room sensor with override and setpoint. 24 TB3 TERMINAL FIELD CONNECTION INPUT SIGNAL 1 T55---SEN/T56---SEN Analog (10k thermistor) 2 RMTOCC Discrete, 24VAC 3 T55---SEN/T56---SEN Analog (10k thermistor) 4 CMPSAFE Discrete, 24VAC 5 T56---SET Analog (10k thermistor) 6 FSD Discrete, 24VAC 7 LOOP---PWR Analog, 24VDC LEGEND: T55 T56 CCN CMPSAFE FILTER 8 SPS Discrete, 24VAC 9 IAQ ---SEN Analog, 4---20mA 10 FILTER Discrete, 24VAC 11 IAQ ---COM/OAQ ---COM/RH ---COM Analog, 4---20mA 12 CCN + (RED) Digital, , 5VDC 13 OAQ ---SEN/RH ---SEN Analog, 4---20mA 14 CCN Gnd (WHT) Digital, 5VDC 15 AUX OUT(Power Exhaust) (Output)Discrete 24VAC 16 CCN --- (BLK) Digital, 5VDC ----------- Space Temperature Sensor Space Temperature Sensor Carrier Comfort Network (communication bus) Compressor Safety Dirty Filter Switch FSD --IAQ --OAQ --RH --SFS --- Fire Shutdown Indoor Air Quality (CO2) Outdoor Air Quality (CO2) Relative Humidity Supply Fan Status Table 5 – Thermostat Mode TB3 TERMINAL FIELD CONNECTION INPUT SIGNAL 1 RAT SEN Analog (10k thermistor) 2 G Discrete, 24VAC 3 RAT SEN Analog (10k thermistor) 4 Y1 Discrete, 24VAC 6 Y2 Discrete, 24VAC 7 LOOP---PWR Analog, 24VDC 5 LEGEND: CCN --G --IAQ --OAQ --RAT --- 8 W1 Discrete, 24VAC 9 IAQ ---SEN Analog, 4---20mA 10 W2 Discrete, 24VAC 11 IAQ ---COM/OAQ ---COM/RH ---COM Analog, 4---20mA 12 CCN + (RED) Digital, 5VDC 13 OAQ ---SEN/RH ---SEN Analog, 4---20mA 14 CCN Gnd (WHT) Digital, 5VDC 15 AUX OUT (Power Exhaust) (Output) Discrete 24VAC 16 CCN --- (BLK) Digital, 5VDC Carrier Comfort Network (communication bus) Thermostat Fan Indoor Air Quality (CO2) Outdoor Air Quality (CO2) Return Air Temperature RH W1 W2 Y1 Y2 25 ----------- Relative Humidity Thermostat Heat Stage 1 Thermostat Heat Stage 2 Thermostat Cool Stage 1 Thermostat Cool Stage 2 50TC-- D Table 4 – Space Sensor Mode Space Sensors — SEN The PremierLink controller is factory-- shipped configured for Space Sensor Mode. A Carrier T-- 55 or T-- 56 space sensor must be used. T-- 55 space temperature sensor provides a signal of space temperature to the PremierLink control. T-- 56 provides same space temperature signal plus it allows for adjustment of space temperature setpoints from the face of the sensor by the occupants. SEN TB3 PL 1 J6-7 TB3 3 PL J6-6 5 J6-5 Jumper SET SET C10022 Fig. 36 - PremierLink T-- 56 Sensor Connect Thermostat — 1 2 4 3 5 6 RED(+) WHT(GND) BLK(-) A 7-- wire thermostat connection requires a 24-- v power source and a common connection. Use the R and C terminals on the CTB’s THERMOSTAT connection strip for these. Connect the thermostat’s Y1, Y2, W1, W2 and G terminals to PremierLink TB3 as shown in Fig. 37. CCN COM SEN 50TC-- D SW1 BRN (GND) BLU (SPT) SENSOR WIRING C08201 If the 50TC-- D unit is equipped with factory-- installed smoke detector(s), disconnect the factory BLU lead at TB3-- 6 (Y2) before connecting the thermostat. Identify the BLU lead originating at CTB-- DDC-- 1; disconnect at TB3-- 6 and tape off. Confirm that the second BLU lead at TB3-- 6 remains connected to PremierLink J4-- 8. Fig. 33 - T-- 55 Space Temperature Sensor Wiring Connect T-- 55: See Fig. 33 for typical T-- 55 internal connections. Connect the T-- 55 SEN terminals to TB3 terminals 1 and 3 (see Fig. 34). TB3 PL SEN 1 J6-7 SEN 3 J6-6 Fig. 34 - PremierLink T-- 55 Sensor 1 2 3 4 SEN SW1 5 6 RED(+) WHT(GND) BLK(-) CCN COM R G 2 PL J4-12 Y1 4 J4-10 Y2 6 J4-8 W1 8 J4-6 W2 10 J4-4 C C CTB THERMOSTAT Fig. 37 - Space Thermostat Connections C10283 If the 50TC 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. 33) installed in the space or in the return duct, or it may be sensor PNO 33ZCSENSAT, installed in the return duct. Connect this sensor to TB3--1 and TB3--3 per Fig. 34. Connect to the CCN bus using a CCN service tool and navigate to PremierLink Configuration screen for Operating Mode. Default setting is Sensor Mode (value 1). Change the value to 0 to reconfigure the controller for Thermostat Mode. SENSOR WIRING JUMPER TERMINALS AS SHOWN Cool R Configure the Unit for Thermostat Mode — SET BLK (T56) BRN (GND) BLU (SPT) CTB THERMOSTAT TB3 C10023 Connect T-- 56: See Fig. 35 for T-- 56 internal connections. Install a jumper between SEN and SET terminals as illustrated. Connect T-- 56 terminals to TB3 terminals 1, 3 and 5 (see Fig. 36). SPACE THERMOSTAT Warm Fig. 35 - T-- 56 Internal Connections C08202 When the PremierLink is configured for Thermostat Mode, these functions are not available: Fire Shutdown (FSD), Remote Occupied (RMTOCC), Compressor Safety (CMPSAFE), Supply Fan Status (SFS), and Filter Pressure Switch (FILTER). 26 Indoor Air Quality (CO2) Sensor — The indoor air quality sensor accessory monitors space carbon dioxide (CO2) levels. This information is used to monitor IAQ levels. Several types of sensors are available, for wall mounting in the space or in return duct, with and without LCD display, and in combination with space temperature sensors. Sensors use infrared technology to measure the levels of CO2 present in the space air. The CO2 sensors are all factory set for a range of 0 to 2000 ppm and a linear mA output of 4 to 20. Refer to the instructions supplied with the CO2 sensor for electrical requirements and terminal locations. See Fig. 38 for typical CO2 sensor wiring schematic. To connect the sensor to the control, identify the positive (4 to 20 mA) and ground (SIG COM) terminals on the sensor. See Fig. 38. Connect the 4-- 20 mA terminal to terminal TB3-- 9 and connect the SIG COM terminal to terminal TB3-- 11. See Fig. 39. IAQ Sensor J4 4-20mA TB3 9 PL J5-5 SIG COM TB3 11 J5-3 24 VAC Fig. 39 - Indoor CO2 Sensor (33ZCSENCO2) Connections C11156 Refer to Form 33CS-- 68SI, PremierLink Installation, Start-- up, and Configuration Instructions, for detailed configuration information. Outdoor Air Quality Sensor (PNO 33ZCSENCO2 plus weatherproof enclosure) — The outdoor air CO2 sensor is designed to monitor carbon dioxide (CO2) levels in the outside ventilation air and interface with the ventilation damper in an HVAC system. The OAQ sensor is packaged with an outdoor cover. See Fig. 40. The outdoor air CO2 sensor must be located in the economizer outside air hood. + 0-10VDC - SIG COM + 4-20mA ALARM NC COM RELAY NO CONTACTS } H G 24 VAC OR + - 24 VDC 2 1 J3 8765432 1 J4 C08635 Fig. 38 - Indoor/Outdoor Air Quality (CO2) Sensor (33ZCSENCO2) - Typical Wiring Diagram To accurately monitor the quality of the air in the conditioned air space, locate the sensor near a return-- air grille (if present) so it senses the concentration of CO2 leaving the space. The sensor should be mounted in a location to avoid direct breath contact. Do not mount the IAQ sensor in drafty areas such as near supply ducts, open windows, fans, or over heat sources. Allow at least 0.9 m (3 ft) between the sensor and any corner. Avoid mounting the sensor where it is influenced by the supply air; the sensor gives inaccurate readings if the supply air is blown directly onto the sensor or if the supply air does not have a chance to mix with the room air before it is drawn into the return airstream. Wiring the Indoor Air Quality Sensor: For each sensor, use two 2-- conductor 18 AWG (American Wire Gage) twisted-- pair cables (unshielded) to connect the separate isolated 24 vac power source to the sensor and to connect the sensor to the control board terminals. COVER REMOVED SIDE VIEW Fig. 40 - Outdoor Air Quality Sensor Cover C07135 Wiring the Outdoor Air CO2 Sensor: A dedicated power supply is required for this sensor. A two-- wire cable is required to wire the dedicated power supply for the sensor. The two wires should be connected to the power supply and terminals 1 and 2. To connect the sensor to the control, identify the positive (4 to 20 mA) and ground (SIG COM) terminals on the OAQ sensor. See Fig. 38. Connect the 4 to 20 mA terminal to the TB3-- 13 terminal of the 50TC-- D . Connect the SIG COM terminal to the TB3-- 11 terminal of the 50TC-- D. See Fig. 41. 27 50TC-- D Economizer Controls OAQ Sensor 4-20mA TB3 13 PL J5-2 SIG COM TB3 11 J5-3 24 VAC Fig. 41 - Outdoor CO2 Sensor Connections C11157 Smoke Detector/Fire Shutdown (FSD) — 50TC-- D This function is available only when PremierLink is configured for (Space) Sensor Mode. The unit is factory-- wired for PremierLink FSD operation when PremierLink is factory-- installed. pressure switch contacts are closed indicating proper supply fan operation. Install the differential pressure switch in the supply fan section according to switch manufacturer’s instructions. Arrange the switch contact to be open on no flow and to close as pressure rises indicating fan operation. Connect one side of the switch’s NO contact set to CTB’s THERMOSTAT-- R terminal. Connect the other side of the NO contact set to TB3-- 8. Setpoint for Supply Fan Status is set at the switch. See Fig. 43. Fan (Pressure) Switch (NO, close on rise in pressure) CTB Thermostat On 50TC--D units equipped with factory--installed Smoke Detector(s), the smoke detector controller implements the unit shutdown through its NC contact set connected to the unit’s CTB input. The FSD function is initiated via the smoke detector’s Alarm NO contact set. The PremierLink communicates the smoke detector’s tripped status to the CCN building control. See Fig. 31, The PremierLink wiring schematic. Filter Status Switch — This function is available only when PremierLink is configured for (Space) Sensor Mode. PremierLink control can monitor return filter status in two ways: By monitoring a field-- supplied/installed filter pressure switch or via supply fan runtime hours. Using switch input: Install the dirty filter pressure switch according to switch manufacturer’s instructions, to measure pressure drop across the unit’s return filters. Connect one side of the switch’s NO contact set to CTB’s THERMOSTAT-- R terminal. Connect the other side of the NO contact set to TB3-- 10. Setpoint for Dirty Filter is set at the switch. See Fig. 42. R TB3 8 C10287 Fig. 43 - PremierLink Wiring Fan Pressure Switch Connection Remote Occupied Switch — The PremierLink control permits a remote timeclock to override the control’s on-- board occupancy schedule and place the unit into Occupied mode. This function may also provide a “Door Switch” time delay function that will terminate cooling and heating functions after a 2-- 20 minute delay. Connect one side of the NO contact set on the timeclock to CTB’s THERMOSTAT--R terminal. Connect the other side of the timeclock contact to the unit’s TB3--2 terminal (see Fig 44). Remote Occupied LCTB Thermostat R Time Clock TB3 2 Filter Switch (NO, close on rising pressure (high drop)) CTB Thermostat R TB3 10 PL J4-6 PL J4-12 C10288 PL J4-4 C10286 Fig. 42 - PremierLink Filter Switch Connection Fig. 44 - PremierLink Wiring Remote Occupied Refer to Form 33CS-- 68SI for additional information on configuring the PremierLink control for Door Switch timer function. When the filter switch’s NO contact set closes as filter pressure drop increases (indicating dirt-- laden filters), the input signal to PremierLink causes the filter status point to read “DIRTY”. Power Exhaust (output) — Using Filter Timer Hours: Refer to Form 33CS-- 68SI for instructions on using the PremierLink Configuration screens and on unit alarm sequence. Power Exhaust Connect the accessory Power Exhaust contactor coils(s) per Fig. 45. PER VIO TB3 15 BRN CTB THERMOSTAT C Supply Fan Status Switch — The PremierLink control can monitor supply fan operation through a field--supplied/installed differential pressure switch. This sequence will prevent (or interrupt) operation of unit cooling, heating and economizer functions until the PL J8-3 C11158 Fig. 45 - PremierLink Power Exhaust Output Connection 28 The RH sensor is not used with 50Hz 50TC-- D models at this time. CCN Communication Bus — The PremierLink controller connects to the bus in a daisy chain arrangement. Negative pins on each component must be connected to respective negative pins, and likewise, positive pins on each component must be connected to respective positive pins. The controller signal pins must be wired to the signal ground pins. Wiring connections for CCN must be made at the 3-- pin plug. The communication bus shields must be tied together at each system element. If the communication bus is entirely within one building, the resulting continuous shield must be connected to ground at only one single point. If the communication bus cable exits from one building and enters another building, the shields must be connected to the grounds at a lightning suppressor in each building (one point only). Connecting CCN bus: NOTE: When connecting the communication bus cable, a color code system for the entire network is recommended to simplify installation and checkout. See Table 7 for the recommended color code. Table 7 – Color Code Recommendations At any baud (9600, 19200, 38400 baud), the number of controllers is limited to 239 devices maximum. Bus length may not exceed 4000 ft (1219 m), with no more than 60 total devices on any 1000-- ft (305 m) section. Optically isolated RS-- 485 repeaters are required every 1000 ft (305 m). NOTE: Carrier device default is 9600 band. Communications Bus Wire Specifications: The CCN Communication Bus wiring is field-- supplied and field-- installed. It consists of shielded 3-- conductor cable with drain (ground) wire. The cable selected must be identical to the CCN Communication Bus wire used for the entire network. CABLE PART NO. 2413 or 5463 American A22503 Belden 8772 Columbia 02525 CCN PLUG PIN NUMBER + Red 1 Ground White 2 --- Black 3 CCN Bus Table 6 – Recommended Cables Alpha CCN BUS WIRE COLOR Connect the CCN (+) lead (typically RED) to the unit’s TB3-- 12 terminal. Connect the CCN (ground) lead (typically WHT) to the unit’s TB3-- 14 terminal. Connect the CCN (-- ) lead (typically BLK) to the unit’s TB3-- 16 terminal. See Fig. 46. See Table 6 for recommended cable. MANUFACTURER SIGNAL TYPE + (RED) TB3 12 PL J2-1 GND (WHT) TB3 14 J2-2 – (BLK) TB3 16 J2-3 Fig. 46 - PremierLink CCN Bus Connections NOTE: Conductors and drain wire must be at least 20 AWG (American Wire Gage), stranded, and tinned copper. Individual conductors must be insulated with PVC, PVC/nylon, vinyl, Teflon, or polyethylene. An aluminum/polyester 100% foil shield and an outer jacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a minimum operating temperature range of - 20_C to 60_C (4_F to 140_F) is required. Do not run communication wire in the same conduit as or next to any AC voltage wiring. 29 C10290 50TC-- D Space Relative Humidity Sensor — RTU Open Control System Refer to Table 8, RTU Open Controller Inputs and Outputs for locations of all connections to the RTU Open board. 50TC-- D The RTU Open control is factory-- mounted in the 50DC*D unit’s main control box, to the right of the CTB. See Fig. 30. Factory wiring is completed through harnesses connected to the CTB. Field connections for RTU Open sensors will be made at the Phoenix connectors on the RTU Open board. The factory-- installed RTU Open control includes the supply-- air temperature (SAT) sensor. The outdoor air temperature (OAT) sensor is included in the FIOP/accessory EconoMi$er2 package. The RTU Open controller is an integrated component of the Carrier rooftop unit. Its internal application programming provides optimum performance and energy efficiency. RTU Open enables the unit to run in 100% stand--alone control mode, Carrier’s I--Vu Open network, or a Third Party Building Automation System (BAS). On--board DIP switches allow you to select your protocol (and baud rate) of choice among the four most popular protocols in use today: BACnet, Modbus, Johnson N2 and LonWorks. (See Fig. 47.) Fig. 47 - RTU Open Multi-- Protocol Control Board 30 C10811 50TC-- D Fig. 48 - RTU Open System Control Wiring Diagram 31 C101076 Table 8 – RTU Open Controller Inputs and Outputs TYPE OF I/O CONNECTION PIN NUMBER(S) zone_temp AI (10K Thermistor) J20--- 1, 2 Supply Air Temperature sa_temp AI (10K Thermistor) J2--- 1, 2 Outdoor Air Temperature oa_temp AI (10K Thermistor) J2--- 3, 4 stpt_adj_offset AI (100K Potentiometer) J20--- 3 Safety Chain Feedback safety_status DI (24 VAC) J1--- 9 Compressor Safety Status comp_status DI (24 VAC) J1--- 2 Fire Shutdown Status firedown_status DI (24 VAC) J1--- 10 Enthalpy Status enthalpy_status DI (24 VAC) J2--- 6 Humidistat Input Status humstat_status DI (24 VAC) J5--- 7 POINT NAME BACnet OBJECT NAME DEDICATED INPUTS Space Temp / Zone Temp Space Temperature Offset Pot 50TC-- D CONFIGURABLE INPUTS Indoor Air CO2 iaq AI (4--- 20 ma) Outdoor Air CO2 oaq AI (4--- 20 ma) space_rh AI (4--- 20 ma) Supply Fan Status* sfan_status DI (24 VAC) Filter Status* filter_status DI (24 VAC) Door Contact Input* door_contact_status DI (24 VAC) Occupancy Contact* occ_contact_status DI (24 VAC) Space Relative Humidity J4--- 2 or J4--- 5 J5--- 1 or J5--- 3 or J5 5 or J5--- 7 OUTPUTS Economizer Output econ_output AO (4--- 20ma) J2--- 5 sfan DO Relay (24VAC , 1A) J1--- 4 Compressor 1 Relay State comp_1 DO Relay (24VAC , 1A) J1--- 8 Compressor 2 Relay State comp_2 DO Relay (24VAC , 1A) J1--- 7 Heat Stage 1 Relay State heat_1 DO Relay (24VAC , 1A) J1--- 6 Heat Stage 2 Relay State heat_2 DO Relay (24VAC , 1A) J1--- 5 pexh DO Relay (24VAC , 1A) J11--- 3 dehum DO Relay (24VAC, 1A) J11--- 7, 8 Supply Fan Relay State Power Exhaust Relay State Dehumidification Relay State LEGEND AI --- Analog Input AO --- Analog Output DI --- Discrete Input DO --- Discrete Output * These inputs (if installed) take the place of the default input on the specific channel according to schematic. Parallel pins J5--- 1 = J2--- 6, J5--- 3 = J1--- 10, J5--- 5 = J1--- 2 are used for field --- installation. The RTU Open controller requires the use of a Carrier space sensor. A standard thermostat cannot be used with the RTU Open system. Supply Air Temperature (SAT) Sensor — On FIOP-- equipped 50TC-- D unit, the unit is supplied with a supply-- air temperature (SAT) sensor (33ZCSENSAT). This sensor is a tubular probe type, approx 152 mm (6-- in.) in length. It is a nominal 10-- k ohm thermistor. The SAT is factory-- wired. The SAT probe is wire-- tied to the supply-- air opening (on the horizontal opening end) in its shipping position. Remove the sensor for installation. Re-- position the sensor in the flange of the supply-- air opening or in the supply air duct (as required by local codes). Drill or punch a 13 mm (1/2 - in.) hole in the flange or duct. Use two field-- supplied, self-- drilling screws to secure the sensor probe in a horizontal orientation. See Fig. 32. Outdoor Air Temperature (OAT) Sensor — The OAT is factory-- mounted in the EconoMi$er2 (FIOP or accessory). It is a nominal 10k ohm thermistor attached to an eyelet mounting ring. EconoMi$er2 — The RTU Open control is used with EconoMi$er2 (option or accessory) for outdoor air management. The damper position is controlled directly by the RTU Open control; EconoMi$er2 has no internal logic device. Outdoor air management functions can be enhanced with field-- installation of these accessory control devices: Enthalpy control (outdoor air or differential sensors) Space CO2 sensor Outdoor air CO2 sensor 32 Field Connections Space Temperature (SPT) Sensors — There are two types of SPT sensors available from Carrier, resistive input non-communicating (T55, T56, and T59) and Rnet communicating (SPS, SPPL, SPP, and SPPF) sensors. Each type has a variety of options consisting of: timed override button, set point adjustment, a LCD screen, and communication tie in. Space temperature can be also be written to from a building network or zoning system. However, it is still recommended that return air duct sensor be installed to allow stand-alone operation for back-up. Refer to the configuration section for details on controller configurations associated with space sensors. S 33ZCT55SPT, space temperature sensor with override button (T-- 55) J20-1 SEN J20-2 Jumper SET SET J20-3 C08461 Fig. 50 - RTU Open T-- 56 Sensor Connections Connect T-- 59: The T-- 59 space sensor requires a separate, isolated power supply of 24 VAC. See Fig. 51 for internal connections at the T-- 59. Connect the SEN terminal (BLU) to RTU Open J20-- 1. Connect the COM terminal (BRN) to J20-- 2. Connect the SET terminal (STO or BLK) to J20-- 3. BLK (STO) BRN (COM) BLU (SPT) OR S 33ZCT56SPT, space temperature sensor with override button and setpoint adjustment (T-- 56) SET SEN OPB COM- PWR+ J20-3 J20-2 J20-1 S 33ZCT59SPT, space temperature sensor with LCD (liquid crystal display) screen, override button, and setpoint adjustment (T-- 59) Use 20 gauge wire to connect the sensor to the controller. The wire is suitable for distances of up to 152 m (500 ft.) Use a three-- conductor shielded cable for the sensor and setpoint adjustment connections. If the setpoint adjustment (slidebar) is not required, then an unshielded, 18 or 20 gauge, two-- conductor, twisted pair cable may be used. Connect T-- 55: See Fig. 33 for typical T-- 55 internal connections. Connect the T-- 55 SEN terminals to RTU Open J20-- 1 and J20-- 2. See Fig. 49. SEN J20-1 SEN J20-2 C08460 Fig. 49 - RTU Open T-- 55 Sensor Connections Connect T-- 56: See Fig. 35 for T-- 56 internal connections. Install a jumper between SEN and SET terminals as illustrated. Connect T-- 56 terminals to RTU Open J20-- 1, J20-- 2 and J20-- 3 per Fig. 50. SENSOR WIRING 24 VAC POWER WIRING NOTE: Must use a separate isolated transformer. C10291 Fig. 51 - Space Temperature Sensor Typical Wiring (33ZCT59SPT) Indoor Air Quality (CO2) Sensor — The indoor air quality sensor accessory monitors space carbon dioxide (CO2) levels. This information is used to monitor IAQ levels. Several types of sensors are available, for wall mounting in the space or in return duct, with and without LCD display, and in combination with space temperature sensors. Sensors use infrared technology to measure the levels of CO2 present in the space air. The CO2 sensors are all factory set for a range of 0 to 2000 ppm and a linear mA output of 4 to 20. Refer to the instructions supplied with the CO2 sensor for electrical requirements and terminal locations. See Fig. 38 for typical CO2 sensor wiring schematic. To accurately monitor the quality of the air in the conditioned air space, locate the sensor near a return-- air grille (if present) so it senses the concentration of CO2 leaving the space. The sensor should be mounted in a location to avoid direct breath contact. 33 50TC-- D Field connections for accessory sensors and input devices are made the RTU Open, at plugs J1, J2, J4, J5, J11 and J20. All field control wiring that connects to the RTU Open must be routed through the raceway built into the corner post as shown in Fig. 24. The raceway provides the UL required clearance between high-- and low-- voltage wiring. Pass the control wires through the hole provided in the corner post, then feed the wires thorough the raceway to the RTU Open. Connect to the wires to the removable Phoenix connectors and then reconnect the connectors to the board. SEN 50TC-- D Do not mount the IAQ sensor in drafty areas such as near supply ducts, open windows, fans, or over heat sources. Allow at least 0.9 m (3 ft) between the sensor and any corner. Avoid mounting the sensor where it is influenced by the supply air; the sensor gives inaccurate readings if the supply air is blown directly onto the sensor or if the supply air does not have a chance to mix with the room air before it is drawn into the return airstream. On 50TC-- D units equipped with factory-- installed Smoke Detector(s), the smoke detector controller implements the unit shutdown through its NC contact set connected to the unit’s CTB input. The FSD function is initiated via the smoke detector’s Alarm NO contact set. The RTU Open controller communicates the smoke detector’s tripped status to the BAS building control. See Fig. 48, the RTU Open System Control Wiring diagram. Wiring the Indoor Air Quality Sensor: For each sensor, use two 2-- conductor 18 AWG (American Wire Gage) twisted-- pair cables (unshielded) to connect the separate isolated 24 vac power source to the sensor and to connect the sensor to the RTU Open control board terminals. The Fire Shutdown Switch configuration, identifies the MENU→Config→Inputs→input 5, normally open status of this input when there is no fire alarm. To connect the sensor to the control, identify the positive (4 to 20 mA) and ground (SIG COM) terminals on the sensor. See Fig. 38. Connect the 4-- 20 mA terminal to RTU Open J4-- 2 and connect the SIG COM terminal to RTU Open J4-- 3. See Fig. 52. IAQ Sensor 4-20mA SIG COM J4-2 J4-3 24 VAC Fig. 52 - RTU Open / Indoor CO2 Sensor (33ZCSENCO2) Connections C10738 Outdoor Air Quality Sensor (PNO 33ZCSENCO2 plus weatherproof enclosure) — The outdoor air CO2 sensor is designed to monitor carbon dioxide (CO2) levels in the outside ventilation air and interface with the ventilation damper in an HVAC system. The OAQ sensor is packaged with an outdoor cover. See Fig. 40. The outdoor air CO2 sensor must be located in the economizer outside air hood. Wiring the Outdoor Air CO2 Sensor: A dedicated power supply is required for this sensor. A two-- wire cable is required to wire the dedicated power supply for the sensor. The two wires should be connected to the power supply and terminals 1 and 2. To connect the sensor to the control, identify the positive (4 to 20 mA) and ground (SIG COM) terminals on the OAQ sensor. See Fig. 38. Connect the 4 to 20 mA terminal to RTU Open J4-- 5. Connect the SIG COM terminal to RTU Open J4-- 6. See Fig. 53. OAQ Sensor/RH Sensor 4-20mA J4-5 SIG COM J4-6 Connecting Discrete Inputs — Filter Status: The filter status accessory is a field-- installed accessory. This accessory detects plugged filters. When installing this accessory, the unit must be configured for filter status by setting MENU→Config→Inputs→input 3, 5, 8, or 9 to Filter Status and normally open (N/O) or normally closed (N/C). Input 8 or 9 is recommended for easy of installation. Refer to Fig. 47 and Fig. 48 for wire terminations at J5. Fan Status: The fan status accessory is a field-- installed accessory. This accessory detects when the indoor fan is blowing air. When installing this accessory, the unit must be configured for fan status by setting MENU→Config→Inputs→input 3, 5, 8, or 9 to Fan Status and normally open (N/O) or normally closed (N/C). Input 8 or 9 is recommended for easy of installation. Refer to Fig. 47 and Fig. 48 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 accessory, the unit must be configured for remote occupancy by setting MENU→Config→Inputs→input 3, 5, 8, or 9 to Remote Occupancy and normally open (N/O) or normally closed (N/C). Also set MENU→Schedules→occupancy source to DI on/off. Input 8 or 9 is recommended for easy of installation. Refer to Fig. 47 and Table 8 for wire terminations at J5. Power Exhaust (output): The relay used by the RTU Open board to control power exhaust is a dry contact which means it does not have 24vac. This 24vac must be connected to the relay to allow it to operate the power exhaust relay in the PE accessory. A 24vac source must be provided to J11-- 2 on the RTU Open control board. This can be provided by the unit’s transformer from various sources. The “R” terminal on the unit’s low voltage terminal board (LVTB) is a logical source. Refer to Fig. 47 and Fig. 48 for wire terminations at J11. Space Relative Humidity Sensor: The RH sensor is not used with 50Hz 50TC-- D models at this time. 24 VAC Fig. 53 - RTU Open / Outdoor CO2 Sensor (33ZCSENCO2) Connections C10739 34 Communication Wiring -- Protocols General — Protocols are the communication languages spoken by control devices. The main purpose of a protocol is to communicate information in the most efficient method possible. Different protocols exist to provide different kinds of information for different applications. In the BAS application, many different protocols are used, depending on manufacturer. Protocols do not change the function of a controller; just make the front end user different. The RTU Open can be set to communicate on four different protocols: BACnet, Modbus, N2, and LonWorks. Switch 3 (SW3) on the board is used to set protocol and baud rate. Switches 1 and 2 (SW1 and SW2) are used to set the board’s network address. See Fig. 54 and 55 for protocol switch settings and address switches. The 3rd party connection to the RTU Open is through plug J19. See Fig. 56 for wiring. NOTE: Power must be cycled after changing the SW1-- 3 switch settings. Refer to the RTU Open Controller Integration Guide (Catalog No. 11--808--428--01) for more detailed information on protocols, 3rd party wiring, and networking. PROTOCOL DS8 DS7 DS6 DS5 DS4 DS3 DS2 DS1 BACnet MS/TP (Master) Unused OFF OFF OFF ON OFF Select Baud Select Baud Modbus (Slave) Unused OFF OFF ON ON OFF Select Baud Select Baud N2 (Slave) Unused OFF OFF OFF ON ON OFF OFF LonWorks Unused ON ON OFF ON OFF OFF OFF NOTE: DS = Dip Switch BACnet MS/TP SW3 example shown Baud Rate Selections BAUD RATE DS2 DS1 9600 OFF OFF 19,200 ON OFF 38,400 OFF ON 76,800 ON ON C07166 Fig. 54 - RTU Open SW3 Dip Switch Settings Fig. 55 - RTU Open Address Switches C10815 Fig. 56 - Network Wiring 35 C10816 50TC-- D SW3 Protocol Selection Local Access — Virtual BACview: Virtual BACview is a freeware computer program that functions as the BACview6 Handheld. The USB Link interface (USB-- L) is required to connect a computer to the RTU Open board. The link cable connects a USB port to the J12 local access port. This program functions and operates identical to the handheld. RTU Open Troubleshooting — Communication LEDs: The LEDs indicate if the controller is speaking to the devices on the network. The LEDs should reflect communication traffic based on the baud rate set. The higher the baud rate the more solid the LEDs will appear. See Table 9. 50TC-- D BACview6 Handheld: The BACview6 is a keypad/display interface used to connect to the RTU Open to access the control information, read sensor values, and test the RTU, see Fig. 57. This is an accessory interface that does not come with the RTU Open controller and can only be used at the unit. Connect the BACview6 to the RTU Open J12 local access port. There are two password protected levels in the display (User and Admin). The user password is defaulted to 0000 but can be changed. The Admin password is 1111 and cannot be changed. There is a 10 minute auto logout if a screen is idle. See Form 48--50HCTQ--01T, Appendix A for navigation and screen content. Access Port P1 P1 Protocol Selector RTU Open J12 Cable P5 P5 BACview6 Local Access Cable Fig. 57 - BACview6 Handheld Connections 36 C10812 Table 9 – LEDs The LEDs on the RTU Open Control Board (see Fig. 47) show the status of certain functions: If this LED is on... Status is... Power RTU Open has power Rx RTU Open is receiving data from the network segment Tx RTU Open is transmitting data over the network segment DO# The digital output is active The Run and Error LEDs indicate control module and network status And Error LED shows... Status is... 2 flashes per second Off Normal 2 flashes per second 2 flashes, alternating with Run LED Five minute auto---restart delay after system error 2 flashes per second 3 flashes, then off Control module has just been formatted 2 flashes per second 4 flashes, then pause Two or more devices on this network have the same ARC156 network address 2 flashes per second On Exec halted after frequent system errors or control programs halted 5 flashes per second On Exec start---up aborted, Boot is running 5 flashes per second Off Firmware transfer in progress, Boot is running 7 flashes per second 7 flashes per second, alternating with Run LED Ten second recovery period after brownout 14 flashes per second 14 flashes per second, alternating with Run LED Brownout On Failure. Try the following solutions: S Turn RTU Open off, then on. S Format RTU Open. S Download memory to RTU Open. S Replace RTU Open. On NOTE: Refer to Catalog No. 48--50HCTQ--01T for complete configuration of RTU Open, operating sequences and troubleshooting information. Refer to RTU Open Controller Integration Guide (Catalog No. 11--808--428--01) for details on configuration and troubleshooting of connected networks. Have a copy of these manuals available at unit start--up. 50TC-- D If Run LED shows... Enthalpy Switch Outdoor Air Enthalpy Control (PNO 33CSENTHSW) -- 24V RED PL6-1 (24-V) GND BLK PL6-4 (COM) LOW GRA 7 CTB ECON (P’LINK: to J4-2) or (RTU Open: to J2-6) Factory Wiring Harness C11160 Fig. 58 - Enthalpy Switch (33CSENTHSW) Connections The enthalpy control (33CSENTHSW) is available as a field-- installed accessory to be used with the EconoMi$er2 damper system. The outdoor air enthalpy sensor is part of the enthalpy control. (The separate field-- installed accessory return air enthalpy sensor (33CSENTSEN) is required for differential enthalpy control. See Fig. 58.) Locate the enthalpy control in the economizer next to the Actuator Motor. Locate two GRA leads in the factory harness and connect the gray lead labeled “ESL” to the terminal labeled “LOW”. See Fig. 58. Connect the enthalpy control power input terminals to economizer actuator power leads RED (connect to 24V) and BLK (connect to GND). The outdoor enthalpy changeover setpoint is set at the enthalpy controller. Differential Enthalpy Control — Differential enthalpy control is provided by sensing and comparing the outside air and return air enthalpy conditions. Install the outdoor air enthalpy control as described above. Add and install a return air enthalpy sensor (see Fig. 59). 37 24V RED PL6-1 (24-V) – 4-20 Main GND BLK PL6-4 (COM) + VDC Out LOW GRA 7 CTB ECON (P’LINK: to J4-2) or (RTU Open: to J2-6) R O TA TIO N Outside Air Enthalpy Switch Return Air Sampling Tube (Shipping Location) + 24-36 VDC In – 4-20 Main Out Return Air Enthalpy Sensor C11161 50TC-- D Fig. 59 - Outside and Return Air Enthalpy Sensor Wiring C09102 Fig. 60 - Typical Supply Air Smoke Detector Sensor Location To wire the return air enthalpy sensor, perform the following: 1. Use a 2--conductor, 18 or 20 AWG, twisted pair cable to connect the return air enthalpy sensor to the enthalpy controller. 2. Connect the field--supplied RED wire to (+) spade connector on the return air enthalpy sensor and the (+) terminal on the enthalpy controller. Connect the BLK wire to (--) spade connector on the return air enthalpy sensor and the (--) terminal on the enthalpy controller. Smoke Detectors Smoke detectors are available as factory-- installed options on 50TC-- D models. Smoke detectors may be specified for Supply Air only or for Return Air without or with economizer or in combination of Supply Air and Return Air. Return Air smoke detectors are arranged for vertical return configurations only. The unit is factory-- configured for immediate smoke detector shutdown operation; additional wiring or modifications to unit terminal board may be necessary to complete the unit and smoke detector configuration to meet project requirements. Return Air Detector Sampling Tube C09135 Fig. 61 - Return Air Sampling Tube Location in Unit without Economizer Return Air Sensor Tube Installation – The return air sampling tube is shipped in the unit’s supply fan section, attached to the blower housing (see Fig. 60). Its operating location is in the return air section of the unit (see Fig. 61, unit without economizer, or Fig. 62, unit with economizer), inserted into the return air sensor module housing which protrudes through the back of the control box. Return Air Detector Sampling Tube C09136 Fig. 62 - Return Air Sampling Tube Location in Unit with Economizer 38 1. Remove the tube from its shipping location. 2. Open the unit end to access the return air sensor (located on right-- hand partition) 3. Orient the tube’s sampling holes into the return air flow direction. For vertical application, position the sampling holes on the bottom of the tube, facing into the bottom return duct opening. For horizontal application, position the sampling holes on the side of the tube, facing the unit’s end panel. 4. Insert the sampling tube into the return air sensor module’s forward or rear opening until the tube snaps into position. 5. Replace end panel or outside air hood. Return Air Sensor Exhaust Tube Installation — The exhaust tube is shipped in a bag located in the control box. The exhaust tube is 152 mm (6 inches) long with a base coupling and a gasket. Slip the gasket over the coupling end, then insert the connector into the rear opening in the sensor module until the tube snaps into location. NOTE: The shipping bag contains a tube plug or cap. This part is not used in this installation and may be discarded. Do NOT insert the plug into the exhaust tube. Test/Reset Magnet — The shipping bag also contains a magnet for testing and resetting smoke detectors. Do not discard this magnet. Additional Application Data — Refer to Catalog No. HKRNKA-- 1XA for discussions on additional control features of these smoke detectors including multiple unit coordination. 39 50TC-- D To install the return air sensor sampling tube: IFM TYPE ELEC. HTR { MED MED MED HIGH 400---3---50 50TC ---D28 STD HIGH 400---3---50 50TC ---D24 STD HIGH 400---3---50 50TC ---D20 STD HIGH MED 400---3---50 50TC-- D 50TC ---D17 STD NO M. V ---Ph---HZ UNIT Table 10 – Unit Wire/Fuse or HACR Breaker Sizing Data P.E. NO P.E. CRHEATER***A00 VERTICAL HORIZONTAL Nom (kW) FLA FLA MCA w/ P.E. (pwrd fr/unit) DISC. SIZE FUSE or HACR BRKR FLA LRA MCA DISC. SIZE FUSE or HACR BRKR FLA LRA NONE NONE --- --- 41.4 50 43 240 47.6 60 50 252 282A00 273A00 17.4 25.1 41.4 50 43 240 47.6 60 50 252 283A00 274A00 34.7 50.1 66.9 70 62 240 74.6 80 69 252 284A00 275A00 52.1 75.2 79.5 90 90 240 87.2 90 98 252 NONE NONE --- --- 42.4 50 44 249 48.6 60 51 261 282A00 273A00 17.4 25.1 42.4 50 44 249 48.6 60 51 261 283A00 274A00 34.7 50.1 68.1 70 63 249 75.9 80 70 261 284A00 275A00 52.1 75.2 80.7 90 92 249 88.5 100 99 261 3.1 3.1 NONE NONE --- --- 45.6 60 48 253 51.8 60 55 265 282A00 273A00 17.4 25.1 45.6 60 48 253 51.8 60 55 265 283A00 274A00 34.7 50.1 72.1 80 66 253 79.9 80 73 265 284A00 275A00 52.1 75.2 84.7 100 95 253 92.5 100 102 265 NONE NONE --- --- 42.4 50 44 249 48.6 60 51 261 282A00 273A00 17.4 25.1 42.4 50 44 249 48.6 60 51 261 283A00 274A00 34.7 50.1 68.1 70 63 249 75.9 80 70 261 284A00 275A00 52.1 75.2 80.7 90 92 249 88.5 100 99 261 NONE NONE --- --- 45.6 60 48 253 51.8 60 55 265 282A00 273A00 17.4 25.1 45.6 60 48 253 51.8 60 55 265 283A00 274A00 34.7 50.1 72.1 80 66 253 79.9 80 73 265 284A00 275A00 52.1 75.2 84.7 100 95 253 92.5 100 102 265 NONE NONE --- --- 48.2 60 51 253 54.4 60 58 265 282A00 273A00 17.4 25.1 48.2 60 51 253 54.4 60 58 265 283A00 274A00 34.7 50.1 75.4 80 69 253 83.1 90 76 265 284A00 275A00 52.1 75.2 88.0 100 98 253 95.7 100 105 265 NONE NONE --- --- 48.8 60 51 262 55.0 60 58 274 282A00 273A00 17.4 25.1 48.8 60 51 262 55.0 60 58 274 283A00 274A00 34.7 50.1 72.1 80 66 262 79.9 80 73 274 284A00 275A00 52.1 75.2 84.7 100 95 262 92.5 100 102 274 NONE NONE --- --- 51.4 60 54 262 57.6 70 61 274 282A00 273A00 17.4 25.1 51.4 60 54 262 57.6 70 61 274 283A00 274A00 34.7 50.1 75.4 80 69 262 83.1 90 76 274 284A00 275A00 52.1 75.2 88.0 100 98 262 95.7 100 105 274 NONE NONE --- --- 58.0 70.0 61 303 64.2 80 68 315 282A00 273A00 17.4 25.1 58.0 70 61 303 64.2 80 68 315 283A00 274A00 34.7 50.1 83.6 90 77 303 91.4 100 84 315 284A00 275A00 52.1 75.2 96.2 110 106 303 104.0 110 113 315 NONE NONE --- --- 52.7 60 55 285 58.9 70 62 297 282A00 273A00 17.4 25.1 52.7 60 55 285 58.9 70 62 297 283A00 274A00 34.7 50.1 72.1 80 66 285 79.9 80 73 297 284A00 275A00 52.1 75.2 84.7 100 95 285 92.5 100 102 297 NONE NONE --- --- 55.3 60 58 285 61.5 80 65 297 282A00 273A00 17.4 25.1 55.3 60 58 285 61.5 80 65 297 283A00 274A00 34.7 50.1 75.4 80 69 285 83.1 90 76 297 284A00 275A00 52.1 75.2 88.0 100 98 285 95.7 100 105 297 NONE NONE --- --- 61.9 80 66 326 68.1 80 73 338 282A00 273A00 17.4 25.1 61.9 80 66 326 68.1 80 73 338 283A00 274A00 34.7 50.1 83.6 90 77 326 91.4 100 84 338 284A00 275A00 52.1 75.2 96.2 110 106 326 104.0 110 113 338 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 NOTE: See page 41 for table legend and notes. 40 MED HIGH 400---3---50 50TC ---D30 P.E. NO P.E. CRHEATER***A00 VERTICAL HORIZONTAL Nom (kW) FLA FLA MCA w/ P.E. (pwrd fr/unit) DISC. SIZE FUSE or HACR BRKR FLA LRA MCA DISC. SIZE FUSE or HACR BRKR FLA LRA NONE NONE --- --- 64.1 80 67 333 70.3 90 75 345 282A00 273A00 17.4 25.1 64.1 80 67 333 70.3 90 75 345 283A00 274A00 34.7 50.1 75.4 80 69 333 83.1 90 76 345 284A00 275A00 52.1 75.2 88.0 100 98 333 95.7 100 105 345 NONE NONE --- --- 70.7 90 75 374 76.9 90 82 386 282A00 273A00 17.4 25.1 70.7 90 75 374 76.9 90 82 386 283A00 274A00 34.7 50.1 83.6 90 77 374 91.4 100 84 386 284A00 275A00 52.1 75.2 96.2 110 106 374 104.0 110 113 386 3.1 3.1 NONE NONE --- --- 71.1 90 75 392 77.3 90 83 404 282A00 273A00 17.4 25.1 71.1 90 75 392 77.3 90 83 404 283A00 274A00 34.7 50.1 84.1 90 77 392 91.9 100 85 404 284A00 275A00 52.1 75.2 96.7 110 106 392 104.5 110 113 404 3.1 Legend and Notes for Table 10 LEGEND: BRKR --DISC --FLA --IFM --LRA --MCA --PE --- { Circuit breaker Disconnect Full load amps Indoor fan motor Locked rotor amps Minimum circuit amps Power exhaust Heater capacity (kW) is based on heater voltage of 400 v. If power distribution voltage to unit varies from rated heater voltage, heater kW will vary accordingly. NOTES: 1. In compliance with NEC requirements (U.S.A. Standard) for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker. 2. MCA calculation for units with electric heaters over 50 kW = (1.25 x IFM amps) + (1.00 x heater FLA). 41 50TC-- D IFM TYPE ELEC. HTR { STD NO M. V ---Ph---HZ UNIT Table 10 -- Unit Wire/Fuse or HACR Breaker Sizing Data (cont) 50TC-- D Economizer 2 Position Damper Fig. 63 - EconoMi$ert IV Wiring Step 12 — Adjust Factory--Installed Options Refer to Fig. 63 for general EconoMi$er IV wiring. External occupancy control is managed through a connection on the Central Terminal Board. If external occupancy control is desired, connect a time clock or remotely controlled switch (closed for Occupied, open for Unoccupied sequence) at terminals marked OCCUPANCY on CTB. Remove or cut jumper JMP 2 to complete the installation. Step 13 — Install Accessories Available accessories include: Copyright 2011 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 Printed in U.S.A. C10645 EconoMi$er2 (without control/for external signal and integrated barometric relief) Power Exhaust Differential dry-- bulb sensor (EconoMi$er IV) Outdoor enthalpy sensor Differential enthalpy sensor Electric Heaters Single Point kits Thermostat / Sensors CO2 sensor DDC interface (PremierLink) Louvered hail guard Phase monitor control EconoMi$er IV Occupancy Switch — Roof Curb Thru-- base connection kit (must be installed before unit is set on curb) Manual outside air damper Two-- Position motorized outside air damper EconoMi$er IV (with control and integrated barometric relief) Unit Without Economizer or 2 Position Damper Refer to separate installation instructions for information on installing these accessories. Pre-- Start and Start-- Up This completes the mechanical installation of the unit. Refer to the unit’s Service and Maintenance manual for detailed Pre-- Start and Start-- up instructions. Edition Date: 08/11 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 42 Catalog No: 50TC ---C06SI Replaces: 50TC--- C05SI START-UP CHECKLIST (Remove and Store in Job File) I. PRELIMINARY INFORMATION MODEL NO.: SERIAL NO.: DATE: TECHNICIAN: II. PRE-START-UP (insert checkmark in box as each item is completed) j VERIFY THAT JOBSITE VOLTAGE AGREES WITH VOLTAGE LISTED ON RATING PLATE j VERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT j REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS j VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS j CHECK REFRIGERANT PIPING FOR INDICATIONS OF LEAKS; INVESTIGATE AND REPAIR IF NECESSARY 50TC-- D j CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS j CHECK THAT RETURN (INDOOR) AIR FILTERS ARE CLEAN AND IN PLACE j VERIFY THAT UNIT INSTALLATION IS LEVEL j CHECK FAN WHEELS AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW TIGHTNESS j CHECK TO ENSURE THAT ELECTRICAL WIRING IS NOT IN CONTACT WITH REFRIGERANT LINES OR SHARP METAL EDGES j CHECK PULLEY ALIGNMENT AND BELT TENSION PER INSTALLATION INSTRUCTIONS III. START-UP (REFER TO UNIT SERVICE/MAINTENANCE MANUAL FOR START--UP INSTRUCTIONS) ELECTRICAL SUPPLY VOLTAGE CIRCUIT 1 COMPRESSOR AMPS L1-L2 L1 L2-L3 L3-L1 L2 L3 CIRCUIT 2 COMPRESSOR AMPS L1 L2 L3 INDOOR-FAN AMPS TEMPERATURES OUTDOOR-AIR TEMPERATURE DB WB RETURN-AIR TEMPERATURE DB WB COOLING SUPPLY AIR DB WB PRESSURES (Cooling Mode) REFRIGERANT SUCTION, CIRCUIT 1 kPa REFRIGERANT SUCTION, CIRCUIT 2 kPa REFRIGERANT DISCHARGE, CIRCUIT 1 kPa REFRIGERANT DISCHARGE, CIRCUIT 2 kPa OR PSIG _C PSIG _C PSIG _C PSIG _C _F _F OR _F _F j VERIFY THAT 3-PHASE FAN MOTOR AND BLOWER ARE ROTATING IN CORRECT DIRECTION. j VERIFY THAT 3-PHASE SCROLL COMPRESSOR IS ROTATING IN THE CORRECT DIRECTION j VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS GENERAL j SET ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO MATCH JOB REQUIREMENTS (IF EQUIPPED) 43 50TC-- D Copyright 2011 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 08/11 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 44 Catalog No: 50TC ---C06SI Replaces: 50TC--- C05SI
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