Carrier 50TCQA User Manual

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50TCQA Single Package Rooftop Heat Pump with Puronr (R --- 410A) Refrigerant S i z e s 0 4 --- 0 7

Installation Instructions

NOTE: Read the entire instruction manual before starting the installation

TABLE OF CONTENTS

SAFETY CONSIDERATIONS 1....................

INSTALLATION 4...............................

Step 1 -- Plan for Unit Location 4..................

Step 2 -- Plan for Sequence of Unit Installation 5......

Step 3 -- Inspect Unit 5...........................

Step 4 -- Provide Unit Support 5...................

Step 5 -- Field Fabricate Ductwork 7................

Step 6 -- Rig and Place Unit 7.....................

Step 7 -- Convert to Horizontal & Connect Ductwork 8.

Step 8 -- Install Outside Air Hood 8................

Step 9 -- Install External Condensate Trap and Line 10.

Step 10 -- Make Electrical Connections 11...........

Step 11 -- Adjust Factory--Installed Options 44........

Step 12 -- Install Accessories 45...................

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock or other condi tions 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.

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 and appropriate national electrical codes (in USA, ANSI/NFPA70, National Electrical Code (NEC); in Canada, CSA C22.1) for special requirements.

It is important to recognize safety inform ation. This is the safety--alert symbol

unit and in instructions or manuals, be alert to the potential for personal injury.

. When you see thi s symbol on the

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 seve re 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.

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 lockout tag. Unit may have more than one power switch.

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

50TCQA

use R--22 service equipment or components on Puron refrigerant equipment.

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.

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 appropri ate protective clothing, safety glasses and gloves when handling parts and servicing heat pump units.

Vertical Connections / Economizer

50TCQA

Horizontal Connections / Economizer

Fig. 1 -- Unit Dimensional Drawing – 04 — 07 Size Units

C09001

50TCQA

Jobsite Survey

Fig. 1 -- Unit Dimensional Drawing – 04 — 07 Size Unit (cont.)

INSTALLATION

18” (457)

C09002

Complete the following checks before installation.

1. Consult local building codes and the NEC (National Electrical Code) ANSI/NFPA 70 for special installation requirements.

2. Determi ne 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. 2.

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.

Do not install unit in an indoor location. Do not locate air inlets near exhaust vents or other sources of contaminated air.

42" (1067)

Required bottom condensate drain connection. Otherwise, 36” (914mm) for condensate connection.

18" (457)

C07459

Fig. 2 -- Service Clearance Dimensional Drawing

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 for removal and disposal of frost and ice that will form durring the heating--defrost mode as well as allow installation of condensate trap per requirements. RefertoStep9—InstallExternalCondensate Trap and Line – for required trap dimensions.

Roof mount —

Check building codes for weight distribution requirements. Unit operat ing weight is shown in Table 1.

Step 3 — Inspect unit

Inspect unit for transportation damage. File any claim with transportation agency.

Step 2 — Plan for Sequence of Unit Installation

The support method used for this unit wil l dictate different sequences for the steps of unit installation. For exampl e, on curb--mounted units, some accessories must be installed on the unit before the unit is placed on the curb. Review t he following for recommended sequences for installation steps.

Curb--mounted installation —

Install curb Install field--fabricated ductwork inside curb Install accessory thru--base service connection package

(affects curb and unit) (refer to accessory installation instructions for details)

Prepare bottom condensate drain connection to suit planned condensat e line routing (refer to Step 9 for details)

Rig and place unit Install outdoor air hood Install condensate line trap and piping Make electrical connections Install other accessories

Pad--mounted installation —

Prepare pad and unit supports Check and tighten the bottom condensate drain

connection plug Rig and place unit Convert unit to side duct connection arrangement Install field--fabricated ductwork at unit duct openings Install outdoor air hood Install condensate line trap and piping Make electrical connections Install other accessories

Frame--mounted installation —

Frame--mounted applications generally follow the sequence for a curb installation. Adapt as required to suit specific installation plan.

Confirm before installation of unit that voltage, ampera ge and circuit protection requirements listed on unit data plate agree with power supply provided.

Step 4 — Provide Unit Support

Roof Curb Mount —

Accessory roof curb details and dimensions are shown in Fig. 3. 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 Fig. 3. Improperly applied gasket can also result in air leaks and poor unit performance.

Curb should be level. This is necessary for unit drain to function properly. Unit leveling toleranc es ar e show in Fig. 4. Refer to Accessory Roof Curb Installation Instructions for additional information as required.

Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb and

not to the unit. The accessory thru--the--base power package must be installed before the unit is set on the roof curb.

If electric and control wiring is to be routed through the basepan, attach the accessory thru--the --base service connections to the basepan in accordance with the accessory installation instructions.

Slab Mount (Horizontal Units Only) —

Provide a level concrete slab that extends a minimum of 6 in. (150 mm) beyond unit cabinet. Install a gravel apron in front of condenser coi l air inlet to prevent grass and foliage from obstructing airflow.

NOTE: Horizontal units may be installed on a roof curb if required.

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 3 equally spaced 4--in. x 4--in. (102 mm x 102 mm) pads on each side.

50TCQA

Table 1 – Operating Weights

50TCQA UNITS LB (KG)

Component A04 A05 A06 A07

Base Unit 505 (229) 510 (231) 590 (268) 630 (286)

Economizer

Vertical 80 (36) 80 (36) 80 (36) 80 (36)

Horizontal 105 (48) 105 (48) 105 (48) 105 (48)

Powered Outlet 32 (15) 32 (15) 32 (15) 32 (15)

Curb

14---in/356 mm 110 (50) 110 (50) 110 (50) 110 (50)

24---in/610 mm 145 (66) 145 (66) 145 (66) 145 (66)

ROOFCURB ACCESSORY

CRRFCURB001A02

CRRFCURB002A02

1’ - 2” [356]

2’ - 0” [610]

UNIT SIZE

50TCQA04-07

50TCQA

Fig. 3 -- Roof Curb Details

C08548

MAXIMUM ALLOWABLE

DIFFERENCE IN. (MM)

A-B

0.5” (13)

1.0” (25)

Fig. 4 -- Unit Leveling Tolerances

Step 5 — Field Fabricate Ductwork

B-C

A-C

1.0” (25)

C06110

should be ducted through the roof deck to comply with applicable fire codes.

For units with accessory electric heaters: Horizontal applications require a minimum clearance to combustible surfaces of 1--in (25 mm) from duct for first 12--in (305 mm) away from unit. V ertical applications do not require a minimum clearance.

Minimum clearance is not required around ductwork.

Step 6 — Rig and Place Unit

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 and Fig. 5 for additional information.

Cabinet return-air static pressure (a nega tive condition) shall not exceed 0.35 in. wg (87 Pa) with economizer or

0.45 in. wg (112 Pa) without economizer.

For vertical ducted applicat ions, secure all ducts to roof curb and building structure. Do not connect ductwork to

unit.

Insulate and weatherproof all external ductwork, joi nts, and roof openings with counter flashing and mastic in accordance with applicable codes.

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

Lifting holes are provided in base rails as shown in Fig. 5. Refer to rigging instructions on unit.

CAUTION

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.

Before setting the unit onto the curb, recheck gasketing on curb.

50TCQA

NOTES:

C06005

UNIT

50TCQA04 755 343 74.38 1889 36.25 921 33.38 848

50TCQA05 760 345 74.38 1889 36.25 921 33.38 848

50TCQA06 840 381 74.38 1889 35.63 905 41.38 1051

50TCQA07 880 399 74.38 1889 37.25 946 41.38 1051

1. Dimensions in ( ) are in millimeters.

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.

MAX WEIGHT

LB KG IN MM IN MM IN MM

A B C

DIMENSIONS

Fig. 5 -- Rigging Details

PositioningonCurb—

Position unit on roof curb so that the following clearances are maintained:

/4in. (6.4 mm) clearance between the roof curb and the base rail inside the front and rear, 0.0 in. clearance between the roof curb and the base rail inside on the duct end of the unit. This will result in the distance between the roof curb and the base rail inside on the condenser end of the unit being approximately equal to Fig. 3, section C--C.

Although unit is weatherproof, guard against water from higher level runoff and overhangs.

After unit is in position, remove the compressor access panel. Holding the blocking between compressors with one hand, cut the strapping. Carefully remove the blocking without damaging tubing, wiring, or controls. Remove the strapping and replace the access panel.

Remove all shipping mate rials and top skid. Recycle or dispose of all shipping materials.

50TCQA

Step 7 — Convert to Horizontal and Connect Ductwork (when required)

Unit is shipped in the vertical duct configuration. Unit without factory--installed economizer or return air smoke detector option may be field--converted to horizontal ducted configuration. To convert to horizontal configuration, remove screws from side duct opening covers and remove covers. Using the same screws, install covers on vertical duct openings with the insulation--side down. Seals around duct openings must be tight. See Fig. 6.

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 t he hood, remove the filter access panel. (See Fig. 7.)

3. Locate and cut the (2) plastic tie--wraps, being careful to not damage any wiring. (See Fig. 8.)

4. Carefully lift the hood assembly through the filter access opening and assemble per the steps outlined in Economizer Hood and Two–Position Hood on page 10.

FILTER ACCESS PANEL

COMPRESSOR ACCESS PANEL

OUTDOOR-AIR OPENING AND INDOOR COIL ACCESS PANEL

Fig. 7 -- Typical Access Panel Locations

C06023

C06108

Fig. 6 -- Horizontal Conversion Panels

Field--supplied flanges should be attached to horizontal duct openings 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.

Do not cover or obscure visibility to the unit’s informative data plate when insulating horizontal ductwork.

Remove Hood Parts

Cut Plastic Ties (2) Places

Economizer

C08633

Fig. 8 -- Economizer Wiring

Two Position Damper Hood Removal and Setup -Factory Option

1. The hood is shipped in knock--down form and assembled to a metal support tray using plastic stretch wrap. Located in the return air compartment, the assembly’s metal tray is attached to the basepan and also attached to the damper using two plastic tie--wraps.

2. To gain access to t he hood, remove the filter access panel. (See Fig. 7.)

3. Locate the (2) screws holding the metal tray to the basepan and remove. Locate and cut the (2) plastic tie--wraps securing the assembly to the damper. (See Fig. 9.) Be careful to not damage any wiring or cut tie--wraps securing any wiring.

4. Carefull y lift the hood assembly (with metal tray) through the filter access opening and assemble per the steps outlined in Economizer Hood and Two–Position Hood on page 10.

Hood Parts

50TCQA

Plastic Tie Wrap Qty (2)

Fig. 9 -- Damper Assembly

Screws for Metal Tray Qty (2)

C08639

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 be used 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 the top of the hood. Remove the screws along t he sides and bottom of the indoor coil access panel. See Fig. 10.

SIDE PANEL

50TCQA

CAULK

INDOOR COIL ACCESS PANEL

HERE

Fig. 10 -- Indoor Coil Access Panel Relocation

2. Swing out indoor coil access panel and insert the hood sides under the panel (hood top). Use the screws provided to attach the hood sides to the hood top. Use screws provided to attach the hood sides to the unit. See Fig. 11.

INDOOR COIL ACCESS PANEL

TOP SIDE PANEL

INDOOR COIL ACCESS PANEL

TOP PANEL

C06025

filter rack (hood divider). Push the filter into position past the open filter clips. Close the filter clips to lock the filter into place. See Fig. 12.

DIVIDER

OUTSIDE AIR

HOOD

CLEANABLE

BAROMETRIC RELIEF

ALUMINUM FILTER

FILTER

FILTER CLIP

C08634

Fig. 12 -- Economizer Filter Installation

6. Caulk the ends of the joint between the unit top panel and the hood top.

7. Replace the filter access panel.

Step 9 — Install External Condensate Trap and Line

The unit has one3/4-in. condensate drain connection on the end of the condensate pan and an alternate connection on the bottom. See Fig. 13. Unit airflow configuration does not determine which drain connection to use. Either drain connection can be used with vertical or horizontal applications.

When using the standard side drain connection, ensure the red plug in the alternate bottom connection is tight. Do this before setting the unit in place. The red drain pan can be tightened with a

/2--in. square socket drive extension.

LEFT HOOD SIDE

19 1/16”

(483mm)

HOOD DIVIDER

SCREW

33 3/8”

(848mm)

C06026

Fig. 11 -- Economizer Hood Construction

3. Remove the shippi ng tape holding the economizer barometric relief damper in place.

4. Insert the hood divider between the hood sides. See Fig. 11 and 12. Secure hood divider with 2 screws on each hood side. T he hood divider is also used as the bottom filter rack for the aluminum filter.

5. Open the filter clips which are located underneath the hood top. Insert the aluminum filter into the bottom

To use the alternate bottom drain connection, remove the red drain plug from the bottom connection (use a1/2-- i n . square socket drive extension) and install it in the side drain connection.

CONDENSATE PAN (SIDE VIEW)

STANDARD SIDE DRAIN

DRAIN

PLUG

(FACTORY-INSTALLED)

ALTERNATE BOTTOM DRAIN

C08021

Fig. 13 -- Condensate Drain Pan (Side View)

The piping for the condensate drain and external trap can be completed after the unit is in place. See Fig. 14.

MINIMUM PITCH 1” (25mm) PER 10’ (3m) OF LINE

TO ROOF DRAIN

NOTE: Trap should be deep enough to offset maximum unit static difference. A 4” (102) trap is recommended.

BASE RAIL

OPEN VENT

2˝ (51) MIN

DRAIN PLUG

SEE NOTE

ROOF CURB

C08022

Fig. 14 -- Condensate Drain Piping Details

All units must have an external trap for condensate drainage. Install a trap at least 4-in. (102 mm) deep and protect against freeze-up. If drain line is installed downstream from the external t rap, pitch the line away from the unit at 1-in. per 10 ft (25 mm in 3 m) of run. Do not use a pipe size smaller than the unit connection

/4-in.).

(

Step 10 — Make Electrical Connections

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning coul d 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 NEC (National Electrical Code); ANSI/NFPA 70, latest edition (in Canada, Canadian Electrical Code CSA [Canadian Standards Association] C22.1), and local electrical codes.

NOTE: Check all factory and field electrical connections for tightness. Field--supplied wiring shall conform with the limitations of 63_F(33_C) rise.

Field Power Supply —

If equipped with optional Powered Convenience Outlet : The power source leads to the convenience outlet’s transformer primary are not factory connected. Installer must connect these leads according to required operation of the convenience outlet. If an always--energized convenience outlet operation is desired, connect the source leads to the line side of the unit--mounted disconnect. (Check with local codes to ensure this m ethod is acceptable in your area.) If a de--energize via unit disconnect switch operation of the convenience outlet is desired, connect the source leads to the load side of the

unit disconnect. On a unit without a unit--mounted disconnect, connect the source leads to compressor contactor C and indoor fan contactor IFC pressure lugs with unit field power leads.

All units except 208/230-v unit s are factory wired for the voltage shown on the nameplate. If the 208/230-v unit is

to be connected to a 208-v power supply, the control transformer must be rewired by moving the black wire

with the connection and moving it to the 208-v

/4-in. female spade connector from the 230--v

/4-in. male

terminal on the primary side of the transformer. Refer to

unit label diagram for additional information. Field power wires will be connected line--side pressure lugs on the power terminal bl ock or at factory--installed option non--fused disconnect.

Field power wires are connected to the unit at line--side pressure lugs on compressor contactor C and indoor fan contactor IFC or terminal board (see wiring diagram label for control box component arrangement) or at factory--installed option non--fused disconnect switch. Max wire size is #2 AWG (copper only). (See Fig. 16)

NOTE: TEST LEADS -- Unit may be equipped with short leads (pigtails) on the field line connection points on contactor C or optional disconnect switch. These leads are for factory run--test purposes only; remove and discard before connecting field power wires to unit connection points. Make field power connections directly to line connection pressure lugs only.

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 furnace. Use only copper wire. (See Fig. 15.)

ELECTRIC

DISCONNECT

SWITCH

COPPER

WIRE ONLY

ALUMINUM

WIRE

A93033

Fig. 15 -- Disconnect Switch and Unit

Units Without Factory--Installed Disconnect —

When installing units, provide a disconnect switch per NEC (National Electrical Code) of adequate size. 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.

50TCQA

Units with Factory--Installed Disconnect —

Convenience Outlets —

The factory--installed option disconnect switch is located in a weatherproof enclosure loc ated 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 Without Disconnect Option

IFC

(3 Phase

Indoor Motor)

11 13 13

Disconnect

per

NEC

L2 L3

208/230-1-60 208/230-3-60

50TCQA

460-3-60 575-3-60

(1 Phase Indoor Motor

and 1 Phase Unit)

Units With Disconnect Option

Optional

Disconnect

Switch

Factory

Wiring

WARNING

ELECTRICAL OPERATION HAZARD

Failure to follow this warning coul d result in personal injury or death.

Units with convenience outlet circuits may use multiple disconnects. Check convenience outlet for power status before opening unit for service. Locate its disconnect switch, if appropriate, and open it. Tag--out this switch, if necessary.

Two types of convenience outlets are offered on 50TCQA models: Non--powered and unit--powered. Both types provide a 125--volt GFCI (ground--fault circuit--interrupter) duplex receptacle rated at 15-- A behind a hinged waterproof access cover, located on the end panel of the unit. See Fig. 17.

Pwd-CO

Convenience

Outlet

GFCI

Pwd-CO

Fuse

Switch

Transformer

Disconnect factory test leads; discard.

C09011

Fig. 16 -- Power Wiring Connections

All units --

All field wiring must comply with NEC and all local codes. Size wire based on MCA (Minimum Circuit Amps) on the unit i nformative plate. See Fig. 16 and the unit label diagram for power wiring connections to the unit power terminal blocks and equipment ground. Maximum wire size is #2 ga AWG per pole.

Provide a ground--fault and short--c ircuit ove r--current protection device (fuse or breaker) per NEC Article 440 (or local codes). Refer to unit informative data plate for MOCP (Maximum Over--current Protection) device size.

All field wiring must comply with the NEC and local requirements.

Control Box

Access Panel

C08128

Fig. 17 -- Convenience Outlet Location

Installing Weatherproof Cover –

A weatherproof while-in-use cover for the factory-installed convenience outlets is now required by UL standards. This cover cannot be factory-mounted due its depth; it must be installed at unit installation. For shipment, t he convenience outlet is covered with a blank cover plate.

The weatherproof cover kit is shipped in the unit’s control box. The kit includes the hinged cover, a backing plate and gasket.

DISCONNECT ALL POWER TO UNIT AND CONVENIENCE OUTLET.

Remove the blank cover plate at the convenience outlet; discard the blank cover.

Loosen the two screws at the GFCI duplex outlet, until

approximately

/2-in (13 mm) under screw heads are exposed. Press the gasket over the screw heads. Slip the backing plate over the screw heads at the keyhole slots and align with the gasket; tighten the two screws until snug (do not over-tighten).

Mount the weatherproof cover to the backing plate as shown in Fig. 18. Remove two slot fillers in the bottom of the cover to permit service tool cords to exit the cover. Check for full closing and latching.

the face of the receptacle to trip and open the receptacle. Check for proper grounding wires and power line phasing if the GFCI receptacle does not trip as required. Press the RESET button to clear the tripped condition.

COVER – WHILE-IN-USE WEATHERPROOF

RECEPTACLE NOT INCLUDED

BASE PLATE FOR GFCI RECEPTACLE

C09022

Fig. 18 -- Weatherproof Cover Installation

Non--powered type: This type requires the field

installation of a general--purpose 125--volt 15--A circuit powered from a source elsewhere in the building. Observe national and local codes when selecting wire size, fuse or breaker requirements and disconnect switch size and location. Route 125--v power supply conductors into the bottom of the utility box containing the duplex receptacle.

Unit--powered type: A unit--mounted transformer is factory--installed to stepdown the main power supply voltage to the unit to 115--v at the duplex receptacle. This option also includes a manual switch with fuse, located in a utility box and mounted on a bracket behind the convenience outlet; access is through the unit’s control box access panel. See Fig. 17.

The primary leads to the convenience outlet transformer are not factory-- connected. Selection of primary power source is a customer--option. If local codes permit, the transformer primary leads can be connected at the line--side terminals on the unit--mounted non--fused disconnect or HACR breaker switch; this will provide service power to the unit when the unit disconnect switch or HACR switch is open. Other conne ction methods will result in the convenience outlet circuit being de--energized when the unit disconnect or HACR switch is open. See Fig. 19.

Duty Cycle: the unit--powered conveni ence outlet has a duty cycle limitation. The transformer is intended to provide power on an intermittent basis for service tools, lamps, etc; it is not intended to provide 15--amps loading for continuous duty loads (such as electric heaters for overnight use). Observe a 50% limit on circuit loading above 8--amps (i.e., limit loads exceeding 8--amps to 30 minutes of operation every hour).

Test the GFCI receptacle by pressing the TEST button on

C08283

UNIT

VOLTAGE

208, 230

460 480

575 600

CONNECTASPRIMARY

240

CONNECTIONS

L1: RED +YEL L2: BLU + GRA

L1: RED Splice BLU + YEL L2: GRA

L1: RED L2: GRA

TRANSFORMER

TERMINALS

H1 + H3 H2 + H4

H2 + H3

H1 H2

Fig. 19 -- Powered Convenience Outlet Wiring

Using unit--mounted convenience outlets: Units with unit--mounded convenience outlet circuits will often require that two disconnects be opened to de--energize all power to the unit. Treat all units as electrically energized until the convenience outlet power is also checked and de--energization is confirmed. Observe National Electrical Code Article 210, Branch Circuits, for use of convenience outlets.

Fuse on power type: The factory fuse is a Bussman “Fusetron” T--15, non--renewable screw--in (Edison base) type plug fuse.

Factory--Option Thru--Base Connections —

This service connection kit consists of a

bulkhead connector and a

/4--in electrical bulkhead

/2--in electrical

connector, all factory--installed in the embossed (raised) section of the unit basepan in the condenser section. The

/2--in bulkhead c onnector ena bles the low--voltage control

wires to pass through the basepan. The

/4--in electrical bulkhead connector al lows the high--voltage power wires to pass through the basepan. See Fig. 20.

Check tightness of connector lock nuts before connecting electrical conduits.

50TCQA

LOW VOLTAGE CONDUIT CONNECTOR

HIGH VOLTAGE CONDUIT CONNECTOR

Fig. 20 -- Thru-- Base Connection Fittings

Field--supplied and field--installed liquidtight conduit connectors and conduit may be attached to the connectors on the basepan. Pull correctly rated high voltage and low voltage through appropriate conduits. Connect the power

50TCQA

conduit to the internal disconnect (if unit is so equipped) or to the external disconnect (through unit side panel). A hole must be field cut in the main control box bottom on the left side so the 24--v control connections can be made. Connect the control power conduit to the unit control box at this hole.

Units without Thru--Base Connections —

1. Install power wiring conduit through side panel openings. Install conduit between disconnect and control box.

2. Install power li nes to terminal connections as shown in Fig. 16.

All Units —

Voltage to compressor terminals during operation must be within voltage range indicated on unit nameplate. See Table 10. On 3--phase units, voltages betwee n phases must be balanced within 2% and the current within 10%. Use the formula shown in the legend for Table 10, Note 2 (see page 44) to determine the percent of voltage imbalance. 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.

Field Control Wiring —

C08637

control the reversing valve operation. If using an electronic thermostat, configure it for “non--heat pump” operation. 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 50 ft. (15 m), use no. 18 AWG (American Wire Gage) insulated wire (35_C minimum). For50to75ft.(15to23m),useno.16AWGinsulated wire (35_C minimum). For over 75 ft. (23 m), use no. 14 AWG insulate d 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.

Terminal

Central

Board

T H E R M O S T A T

C09012

Typical

Thermostat

Connections

O/B/Y2

(Note 1)

Note 1: Typical multi-function marking. Follow manufacturer’s configuration instructions to select Y2. Do not configure for O output.

Note 2: W2 connection not required on units without electric heating.

Field Wiring

(Note 2)

Fig. 21 -- Typical Low--Voltage Control Connections

The 50TCQA 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--MP Controller for Building Management Systems using non--CCN protocols (RTU--MP is available as a factory--installed option only).

Thermostat —

Install a Carrier-- approved accessory 2 stage Cooling/Heating thermostat according to installation instructions included with the accessory. The 50TCQ models do not require a thermostat with an O function to

Unit without thru--base connection kit —

Pass the thermostat control wires through the hole provided in the corner post; then feed the wires through the raceway built into the corner post to the control box. Pull the wires over to the terminal strip on the upper--left corner of the Central Terminal Board (CTB). See Fig. 22.

NOTE: If thru--the--bottom connections accessory is used, refer to the accessory installation instructions for information on routing power and control wiring.

Heat Anticipator Settings —

Set heat anticipator settings at 0.14 amp for the first stage and 0.14 amp for second--stage heating, when available.

RACEWAY

DISCONNECT MOUNTING LOCATION

HOLE IN END PANEL (HIDDEN)

Fig. 22 -- Field Control Wiring Raceway

C08027

UNIT BLOCK-OFF PAN EL

Fig. 23 -- Typical Access Panel Location

Not all available heater m odules may be used in every

OUTDOOR ACCESS PANEL

unit. Use only those heater modules that are UL listed for

Electric Heaters

50TCQ 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 insulators, line--break limit switches and a c ontrol contactor. One or two heater modules may be used in a unit.

Heater module s are installed in the compartment below the indoor (supply) fan outlet. Access is through the

use in a specific size unit. Refer to the label on the unit cabinet for the list of approved heaters.

Unit heaters are marked with Heater Model Numbers. But heaters are ordered as and shipped in cartons marked with a corresponding heater Sales Package part number. See Table 2 for correlation between heater Model Number and Sales Package part number.

NOTE: The value in position 9 of the part number differs between the sales package part number (value is 1 or 3) and a bare heater model number (value is 0).

indoor access panel. Heater modules slide into the compartment on tracks along the bottom of the heater opening. See Fig. 23, Fig. 24 and Fig. 25.

Table 2 – Heater Model Number

Bare Heater Model Number C R H E A T E R 0 0 1 A 0 0

INDOOR ACCESS PAN EL

C08133

50TCQA

Heater Sales Package PNO Includes:

Bare Heater Carton and packing materials Installation sheet

C R H E A T E R 1 0 1 A 0 0

DISCONNECT MOUNTING LOCATION

MAIN CONTROL BOX

EMT OR RIGID CONDUIT (FIELD-SUPPLIED)

BRACKET AND CONDUIT DRIP BOOT

SINGLE POINT BOX

SINGLE POINT BOX MOUNTING SCREW

CONTROL WIRE TERMINAL BLOCK

HEATER MODULE (LOCATION 1)

CENTER POST

HEATER MODULE (LOCATION 2)

MANUAL RESET LIMIT SWITCH

HEATER COVERS

HEATER MOUNTING BRACKET

C08134

Fig. 24 -- Typical Component Location

Fig. 25 -- Typical Module Installation

TRACK

FLANGE

C08135

CONTROL BOX

BUSHING

SINGLE POINT BOX MOUNTING SCREWS

DRIP BOOT BRACKET MOUNTING SCREWS

POWER WIRES

FOAM BUSHING

HEATER RELAYS

HEATER MOUNTING SCREWS

Fig. 26 -- Typical Single Point Installation

L I

E D

P A

C O

R P .

M O

E L

O .

I A

N O.

2 2

. 2

ISTED

NDITIONING

UIP

ACCESS

6 N

/ N

6 10-

REV

C08136

50TCQA

Single Point Boxes and Supplementary Fuses — 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 distribution and fuse blocks. The single point box will be installed directly under the unit control box, just to the left of the partition separating the indoor section (with electric heaters) from t he outdoor section. The Single Point Box has a hinged access cover. See Fig. 26. The Single Point Box also includes pigtails to complete the wiring between the Single Point Box and the unit’s main control box terminals. Refer to the accessory heater and Single Point Box installation instructions for details on tap connections.

DEFROST

BOARD

E-HEAT

P3-3

All fuses on 50TCQ units are 60--A. (Note that all heaters are qualified for use with a 60--A fuse, regardless of actual heater ampacity, so only 60--A fuses are necessary.)

Single Point Boxes without Fuses — Refer to accessory heater and Single Point Box installation instructions for details on tap connections.

Low--Voltage Control Connections — Run the low--voltage control leads from the heater module(s) -VIO and BRN (two of each if two modules are installed; identify for Module #1) -- to the 4--pole terminal board TB4 located on the heater bulkhead to the left of Heater #1. Connect the VIO leads from Heater #1 and Heater #2 to terminal TB4--1. Connect the BRN leads to terminal TB4--3. See Fig. 27.

ORN

BRN

ORN BRN

TB4

Field Connections

VIO BRN BRN

VIO

Elec Htr

VIO HR2

VIO BRN

BRN

HR1

HR1: On Heater 1 in Position #1 HR2: On Heater 2 in Position #2 (if installed)

Fig. 27 -- Accessory Electric Heater Control Connections

C09013

PremierLinkt (Factory--Option) —

50TCQA

C08199

Fig. 28 -- PremierLink Controller

The PremierLink controller (see Fig. 28) 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 Pilot (TM), Touch Pilot (TM) and Service Tool. (Standard tier display t ools Navigatort and Scrolling Marquee are not suitable for use with latest PremierLink controller (Version 2.x).)

The PremierLink control is factory--mounted in the 50TCQ unit’s main control box to the left of t he Central Terminal Board (CTB). Factory wiring is completed through harnesses connected to the CTB thermostat . Field connections are made at a 16--pole terminal block (TB1) located on the bottom shelf 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 a Carrier electronic thermostat or a CCN connection for time broadcast to initiate its internal timeclock. This is necessary for broadcast of time of day functions (occupied/unoccupied).

NOTE: PremierLink controller is shipped in Sensor mode. To be used with a thermostat, the PremierLink controller must be configured to Thermosta t mode. Refer to PremierLink Configuration instructions for Operating Mode.

Supply Air Temperature (SAT) Sensor — On FIOP--equipped 50TCQ unit, the unit is supplied with a supply--air temperature (SAT) sensor (33ZCSENSAT). This sensor is a tubular probe type, approx 6--inche s (12.7 mm) 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

/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. 29.

SUPPLY AIR TEMPERATURE SENSOR

SUPPLY AIR

RETURN AIR

ROOF CURB

C08200

Fig. 29 -- Typical Mounting Location for Supply Air

Temperature (SAT) Sensor on Small Rooftop Units

NOTE: Refer to Form 33CS--58SI for complete

PremierLink configuration, operat ing sequences and troubleshooting information. Have a copy of this manual available at unit start--up.

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.

50TCQA

Fig. 30 -- PremierLink Wiring Schematic

C09014

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$er2 — T he PremierLink control is used with EconoMi$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.

Outdoor air management functions can be enhanced with field-- installation of these accessory control devices:

Enthalpy control (outdoor air or differential sensors) Space CO Outdoor air CO

sensor

Refer to Table 3 for accessory part numbers.

Field connections — Field connections for accessory sensor and input devices are made at the 16--pole terminal block (TB1) locat ed on the control box bottom shelf in front of the PremierLink control (See Fig. 30). 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 fiel d connection locations (and for continued connections at the PremierLink board inputs).

Table 4 provides a summary of field connections for units equipped with Space Sensor. Table 5 provides a summary of field c onnections for units equipped with Space Thermostat.

Connect T--55 -- See Fig. 31 for typical T--55 internal connections. Connect the T--55 SEN terminals to TB1 terminals 1 and 3 (see Fig. 32).

TB1 PL

SEN J6-7

SEN

J6-6

C08212

Fig. 32 -- PremierLink T--55 Sensor

Connect T--56 -- See Fig. 33 for T--56 internal connections. Install a jumper between SEN and SET terminals as illustrated. Connect T--56 terminals to TB1 terminals 1, 3 and 5 (see Fig. 34).

SEN

RED(+)

WHT(GND)

BLK(-)

SET

BLK (T56)

BRN (GND) BLU (SPT)

CCN COM

SENSOR WIRING

JUMPER TERMINALS AS SHOWN

SW1

50TCQA

Space Sensors -- 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.

SW1

SEN

RED(+)

WHT(GND)

BLK(-)

BRN (GND) BLU (SPT)

CCN COM

SENSOR WIRING

C08201

Fig. 31 -- T--55 Space Temperature Sensor Wiring

Cool Warm

C08202

Fig. 33 -- T--56 Internal Connections

TB1 PL

SEN J6-7

SEN

Jumper

TB1

J6-6

SET

J6-5

C08213

Fig. 34 -- PremierLink T--56 Sensor

Connect Thermostat — 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 TB1 as shown in Fig. 35.

If the 50TCQ unit is equipped with factory--installed smoke detector(s), disconnect the factory BLU lead at TB1--6 (Y2) before connecting the thermostat. Identi f y the BLU lead originating at CTB--DDC--1; disconnect at TB1-- 6 and tape off. Confirm that the second BLU lead at TB1-- 6 remains connected to PremierLink J4-- 8.

SPACE THERMOSTAT

CTB THERMOSTAT

TB1

GJ4-12

CTB THERMOSTAT

Fig. 35 -- Space Thermostat Connections

50TCQA

OUTDOOR AIR

APPLICATION

Differential Dry Bulb

Tem p era t u re wi t h

PremierLink

(PremierLink requires

4 --- 2 0 m A A c t u a to r)

Single Enthalpy with

PremierLink

(PremierLink requires

4 --- 2 0 m A A ct ua t o r )

Differential Enthalpy

with PremierLink

(PremierLink requires

4 --- 2 0 m A A ct ua t o r )

NOTES: CO

Sensors (Optional):

33ZCSENCO2 --- Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor. 33ZCASPCO2 --- Aspirator box used for duct --- mounted CO 33ZCT55CO2 --- Space temperature and CO 33ZCT56CO2 --- Space temperature and CO

TEMPERATURE

SENSOR

I nc lu d e d ---

CRTEMPSN001A00

I nc lu d e d ---

Not Used

I nc lu d e d ---

Not Used

Table 3 – PremierLink Sensor Usage

RETURN AIR

TEMPERATURE

SENSOR

R eq u i r e d ---

33ZCT55SPT

or equivalent

---

room sensor.

room sensor with override.

room sensor with override and setpoint.

ENTHALPY SENSOR

J4-10

J4-8

J4-6

J4-4

C08119

OUTDOOR AIR

--- ---

R eq u i r e s ---

HH57AC077

or equivalent

R eq u i r e s ---

HH57AC077

or equivalent

RETURN AIR

ENTHALPY SENSOR

---

R eq u i r e s ---

HH57AC078

or equivalent

Table 4 – Space Sensor Mode

TB1 TERMINAL FIELD CONNECTION INPUT SIGNAL

1 T5 5 --- S E N/ T 5 6 --- S E N Analog (10k thermistor)

2 RMTOCC Discrete, 24VAC

3 T5 5 --- S E N/ T 5 6 --- S E N Analog (10k thermistor)

4 CMPSAFE Discrete, 24VAC

5 T56 --- SET Analog (10k thermistor)

6 FSD Discrete, 24VAC

7 LOOP---PWR Analog, 24VDC

8 SPS Discrete, 24VAC

9 IAQ --- SEN A na lo g, 4 --- 2 0 m A

10 FILTER Discrete, 24VAC

11 I A Q --- C O M / O A Q --- C O M / R H --- C O M A na lo g, 4 --- 2 0 m A

12 CCN + (RED) Digital,,5VDC

13 OAQ---SEN/RH --- SEN A na lo g, 4 --- 2 0 m A

14 CCN Gnd (WHT) Digital, 5VDC

15 AUX OUT(Power Exhaust) (Output)Discrete 24VAC

16 CCN --- (BLK) Digital, 5VDC

LEGEND:

T 5 5 --- S p a c e Te m p e r a t u r e S e n s o r FS D --- F i r e S h u t d ow n T 5 6 --- S p a c e Te m p e r a t u r e S e n s o r IA Q --- I n d o o r A i r Q u a l it y ( C O CCN --- Carrier Comfort Network (communication bus) OAQ --- Outdoor Air Quality (CO C M P S A F E --- C o m p r e s s o r S a f e t y RH --- R e l a t iv e H u m i d i t y F I LT E R --- D i r t y F i l t e r S w i t c h SF S --- S u p p l y Fa n S t a t u s

50TCQA

)

Table 5 – Thermostat Mode

TB1 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

8 W1 Discrete, 24VAC

9 I A Q --- S E N Analog, 4 - --20mA

10 W2 Discrete, 24VAC

11 I A Q --- C O M / O A Q --- C O M / R H --- C O M Analog, 4 --- 20mA

12 CCN + (RED) Digital, 5VDC

13 O A Q --- S E N / R H --- S E N Analog, 4 ---20mA

14 CCN Gnd (WHT) Digital, 5VDC

15 AUX OUT (Power Exhaust) (Output) Discrete 24VAC

16 CCN --- (BLK) Digital, 5VDC

LEGEND:

CCN --- Carrier Comfort Network (communication bus) RH --- Relative Humidity G --- Thermostat Fan W1 --- Thermostat Heat Stage 1 IAQ --- Indoor Air Quality (CO OAQ --- Outdoor Air Quality (CO RAT --- Return Air Temperature Y2 --- Thermostat Cool Stage 2

) W2 --- Thermostat Heat Stage 2

) Y1 --- Thermostat Cool Stage 1

If the 50TCQ 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 sensor PNO 33ZCSENSAT, installed in the return duct. Connect this sensor to TB1--1 and TB1--3 per Fig. 32.

Configure the unit for Thermostat Mode — 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.

Return Air Enthalpy Sensor — Mount the return--air enthalpy sensor (33CSENTSEN) in the return--air section of the economizer. The return air sensor is wired to the enthalpy controller (33CSENTHSW). See Fig. 37.

24V – 4-20 Main

+ VDC Out

GND

LOW

RED

BLK

GRA

ESL

ECONO MOTOR

When the PremierLink is configured for T hermostat Mode, these functions are not available: Fire Shutdown (FSD), Remote Occupied (RMTOCC), Compressor Safety (CMPSAFE), Supply Fan Status (SFS), and Filter Pressure Switch (FILTER).

50TCQA

Economizer controls —

Outdoor Air Enthalpy Control (PNO 33CSENTHSW) --

The enthalpy control (33CSENTHSW) is available as a field--installed accessory to be used with the EconoMi$er2 damper system. The outdoor ai r entha lpy 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. 36.)

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. 36. Connect the enthalpy control power input terminals to economizer actuator power leads RED (connect to 24V) and BLK (connect to GND).

Enthalpy Switch

24V

GND

LOW

RED

BLK

GRA

ESL

ECONO MOTOR

CTB ECON

+ 24-36 VDC In

– 4-20 Main Out

C09027

Fig. 37 -- Outside and Return Air Enthalpy Sensor

Wiring

To wire the return air enthalpy sensor, perform the following:

1. Use a 2--conductor, 18 or 20 AWG, twisted pair c able 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.

Indoor Air Quality (CO

sensor) — The indoor air quality

sensor accessory monitors space carbon dioxide (CO 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 CO

The CO

present in the space air.

sensors are all fac tory 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 CO

sensor for electrical

requirements and terminal locations. See Fig. 38 for typical CO

sensor wiring schematic.

)

Factory Wiring Harness

C09026

Fi g. 36 -- Enthalpy Switch (33CSENTHSW) Connections

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 t he outdoor air enthalpy control as described above. Add a nd install a return air enthalpy sensor.

24 VAC

24 VDC

J3 J4

Refer to Form 33CS--58SI, PremierLi nk Installation, Start--up, and Configuration Instructions, for detailed configuration information

Outdoor Air Quality Sensor (PNO 33ZCSENCO2 plus weatherproof enclosure) — The outdoor air CO designed to monitor carbon di oxide (CO

sensor is

) levels in the

outside ventilation air and interface with the ventilation

0-10VDC

SIG COM

4-20mA

ALARM

NC COM

RELAY

}

CONTACTS

damper in an HVAC system. The OAQ sensor is packaged with an outdoor cover. See Fig. 40. The outdoor air CO sensor must be located in the economizer outside air hood.

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 CO 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 3 ft (0.9 m) 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

Wiring the Outdoor Air CO

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 t he 4 to 20 mA terminal to the TB1--13 terminal of the 50TCQ. Connect the SIG COM terminal to the TB1--11 terminal of the 50TCQA. See Fig. 41.

50TCQA

C07135

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 TB1--9 and connect the SIG COM terminal to terminal TB1--11. See Fig. 39.

IAQ Sensor

SEN J5-5

COM

24 VAC

TB1

J5-3

C08636

Fig. 39 -- Indoor CO2Sensor (33ZCSENCO2)

Connections

OAQ Sensor/RH Sensor

SEN J5-2

COM

24 VAC

TB1

J5-3

C08275

Fig. 41 -- Outdoor CO2Sensor Connections

Smoke Detector/Fire Shutdown (FSD) — This function is available only when PremierLink is c onfigured for (Space) Sensor Mode. The unit is factory--wired for PremierLink FSD operation when PremierLink is factory--installed.

On 50TCQ units equipped with factory--instal led 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. 30, 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

50TCQA

NO contact set to TB1-- 10. Setpoint for Dirty Filter is set at the switch. See Fig. 42.

Fan (Pressure) Switch (NO, close on rise in pressure)

CTB

Thermostat

TB1

J4-6

C08118

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 a nd 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 TB1--2 terminal.

Filter Switch (NO, close on rising pressure (high drop))

CTB

Thermostat

TB1

J4-4

C08216

Fig. 42 -- PremierLink Filter Switch Connection

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”.

Using Filter Timer Hours: Refer to Form 33CS-- 58SI for instructions on using the PremierLink Configuration screens and on unit alarm sequence.

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 pressure switch contacts are closed indicating proper supply fan operation.

Remote Occupied

Time Clock

CTB

Thermostat

TB1

J4-12

C08214

Fig. 44 -- PremierLink Wiring Remote Occupied

Refer to Form 33CS--58SI for additional information on configuring the PremierLink control for Door Switch timer function.

Power Exhaust (output) -- Connect the accessory Power Exhaust contactor coils(s) per Fig. 45.

Space Relative Humidity Sensor — The RH sensor is not used with 50TCQ models at this time.

Power Exhaust

PEC

TAN

TB1

J8-3

CTB

THERMOSTAT

GRA

C08120

Fig. 45 -- PremierLink Power Exhaust Output

Connection

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 TB1--8. Setpoint for Supply Fan Status is set at the switch. See Fig. 43.

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.

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--ft section. Optically isolated RS--485 repeaters are required every 1000 ft.

NOTE: Carrier device default is 9600 band.

COMMUNICATION BUS WIRE SPECIFICATIONS — The CCN Communi cation 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.

See Table 6 for recommended cable.

Connecting CCN bus:

NOTE: When connecting the communication bus cable, a color code system for the entire network i s recommended to simplif y installation and checkout. See Table 7 for the recommended color code.

Table 7 – Color Code Recommendations

SIGNAL TYPE

+ Red 1

Ground White 2

--- Black 3

CCN BUS WIRE

COLOR

CCN PLUG PIN

NUMBER

Table 6 – Recommended Cables

MANUFACTURER CABLE PART NO.

Alpha 2413 or 5463

American A22503

Belden 8772

Columbia 02525

NOTE: Conduc tors and drain wire must be at l east 20 AWG, 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

-- 2 0 _Cto60_C is required. Do not run communication wire in the same conduit as or next to any AC voltage wiring.

The communication bus shields must be tied together at each system element. If the communication bus is entirely within one building, the resulting c ontinuous shield must be connecte d 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).

Connect the CCN (+) lead (typically RED) to the unit’s TB1--12 terminal. Connect the CCN (ground) lea d (typically WHT) to the unit’s TB1-- 14 terminal. Connect the CCN (--) lead (typically BLK) to the unit’s TB1--16 terminal. See Fig. 46.

CCN Bus

+ (RED)

GND (WHT)

– (BLK)

TB1

J2-1

J2-2

J2-3

C08276

Fig. 46 -- PremierLink CCN Bus Connections

50TCQA

RTU--MP control system

The RTU--MP controller, see Fig. 47, provides expanded stand--alone operation of the HVAC system plus connection a nd control through communication with several Building Automation Systems (BAS) through popular third--party network systems. The available network systems are BACnet MP/TP, Modbus and Johnson J2. Communication with LonWorks is also possible by adding an accessory interface card to the RTU--MP. Selection of the communication protocol and baud rate are made at on--board DIP switches.

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The RTU--MP control is factory--mounted in the 50TCQ unit’s main control box, to the left of the CTB. See Fig. 48. Factory wiring is completed through ha rnesses connected to the CTB. Field connections for RTU--MP sensors will be made at the Phoenix connectors on the RTU--MP board. The factory--installed RTU--MP control includes the supply--air temperature (SAT ) sensor. The outdoor air temperature (OAT) sensor is included in the FIOP/accessory EconoMi$er2 package.

Refer to Table 8, RTU--MP Controller Inputs and Outputs for locations of all connections to the RTU--MP board.

Fig. 47 -- RTU--MP Multi--Protocol Control Board

Fig. 48 -- 50TCQ Control Box Component Locations

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C08652

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Fig. 49 -- RTU--MP System Control Wiring Diagram

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Table 8 – RTU--MP Controller Inputs and Outputs

POINT NAME

Space Temperature Sensor sptsens AI (10K Thermistor) J 2 0 --- 1 , 2 Supply Air Temperature sat AI (10K Thermistor) J2 --- 1, 2 Local Outside Air Temperature Sensor oatsens AI (10K Thermistor) J2---3, 4 Space Temperature Offset Pot sptopot AI (100K Potentiometer) J 2 0 --- 3 Indoor Air Quality iaq A I ( 4 --- 2 0 m a ) J4---2, 3 Outdoor Air Quality oaq A I ( 4 --- 2 0 ma ) J4 --- 5, 6 Safety Chain Feedback safety DI (24 VAC) J1---9 Compressor Safety compstat DI (24 VAC) J1 --- 2 Fire Shutdown firedown DI (24 VAC) J 1 --- 1 0 Enthalpy Switch enthalpy DI (24 VAC) J2---6, 7 Humidistat Input Status humstat DI (24 VAC) J5---7, 8

Space Relative Humidity sprh AI (4 --- 2 0 m a)

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Outside Air Relative Humidity oarh A I ( 4 --- 2 0 m a )

Supply Fan Status fanstat DI (24 VAC)

Filter Status filtstat DI (24 VAC)

Remote Occupancy Input remocc DI (24 VAC)

Economizer Commanded Position econocmd 4- --20ma J2---5 SupplyFanRelayState sf 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 Power Exhaust Relay State aux_2 DO Relay (24VAC , 1A) J1 1 --- 3 Dehumidification Relay State humizer DO Relay (24VAC, 1A) J 11 --- 7 , 8

LEGEND AI --- A n a l o g I n p u t AO --- A n a lo g O u t p u t DI --- D i s c r e t e I n p u t DO --- Discrete Output

* These inputs (if installed) take the place of the default input on the specific channel according to schematic. P a r a l l e l p i n s J 5 --- 1 = J 2 --- 6 , J 5 --- 3 = J 1 --- 1 0 , J 5 --- 5 = J 1 --- 2 a r e u s ed f o r f i e l d --- i n s t a ll a t i o n .

BACnet OBJECT

NAME

INPUTS

CONFIGURABLE INPUTS*

OUTPUTS

TYPE OF I/O

CONNECTION PIN

NUMBERS

J 4 --- 2 , 3 or J 4 --- 5 ,6

J5--- 1,2 or J5 --- 3,4 or

J5 5,6 or J5 ---7,8

The RTU--MP controller requires the use of a Carrier space sensor. A standard thermostat cannot be used with the R TU--MP system.

Supply Air Temperature (SAT) Sensor -- On FIOP--equipped 50TCQ unit, the unit is supplied with a supply--air temperature (SAT) sensor (33ZCSENSAT). This sensor is a tubular probe type, approx 6--inches (12.7 mm) in length. It is a nominal 10--k ohm thermistor.

codes). Drill or punch a

/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. 29.

Outdoor Air Temperature (OAT) Sensor -- T he 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$er2 -- The RTU--MP cont rol is used with EconoMi$er2 (option or accessory) for outdoor air management. The damper position is controlled directly by the RTU--MP 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 CO Outdoor air CO

sensor

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 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--MP. Connect to the wires to the removable Phoenix connectors and then reconnect the connectors to the board.

Space Temperature (SPT) Sensors

OR SET SEN

BRN (COM)

BLK (STO)

BLU (SPT)

SENSOR

WIRING

A field --supplied Carrier space temperature sensor is required with the RTU--MP to monitor space temperature. There are 3 sensors available for this application:

S 33ZCT55SPT, space temperature sensor with override

button

S 33ZCT56SPT, space temperature sensor with override

button and setpoint adjustment

S 33ZCT59SPT, space temperature sensor with LCD

(liquid crystal display) screen, overri de button, and setpoint adjustment

Use 20 gauge wire to connect the sensor t o the controller. The wire is suitable for distances of up to 500 ft. Use a three--conductor shielded cable for the sensor and setpoint adjustment connections. If the setpoint a djustment (slidebar) is not required, then an unshielded, 18 or 20 gauge, two--conductor, twisted pair c able ma y be used.

Connect T--55 -- See Fig. 31 for typical T--55 internal connections. Connect the T--55 SEN terminals to RTU--MP J20--1 and J20--2. See Fig. 50.

SEN

J20-1

J20-2

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Fig. 50 -- RTU--MP T--55 Sensor Connecti ons

Connect T--56 -- See Fig. 33 for T--56 internal connections. Install a jumper between SEN and SET terminals as illustrated. Connect T--56 t erminals to RTU--MP J20--1, J20--2 and J20--3 per Fig. 51.

SEN J20-1

OPB COM- PWR+

POWER

24 VAC

NOTE: Must use a separate isolated transformer.

WIRING

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Fig. 52 -- Space Temperature Sensor T ypical Wiring

(33ZCT59SPT)

Economizer controls —

Outdoor Air Enthalpy Control (PNO HH57AC077) --

The enthalpy control (HH57AC077) is available a s a field--installed accessory to be used with the EconoMi$er2 damper system. The outdoor ai r entha lpy sensor is part of the enthalpy control. (The separate field--installed accessory return air enthalpy sensor (HH57AC078) is required for differential enthalpy control. See “Return Air Enthalpy Sensor”below.)

Locate the enthalpy control in the economizer hood. Locate two GRA leads in the factory harness and connect these leads to enthalpy control sensors 2 and 3. See Fig. 36. Conne ct the enthalpy control power input terminals to economizer actuator power leads RED (connect to TR) and BLK (connect to TR1).

The outdoor enthalpy changeover setpoint is set at the enthalpy controller.

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SEN

Jumper

SET

J20-2

J20-3

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Fig. 51 -- RTU--MP T--56 Sensor Connecti ons

Connect T--59 -- The T--59 space sensor requires a separate, isolated power supply of 24 VAC. See Fig. 51 for internal conne ctions at the T--59. Connect the SEN terminal (BLU) to RTU--MP J20-- 1. Connect the COM terminal (BRN) to J20--2. Connect the SET terminal (STO or BLK) to J20--3.

Return Air Enthalpy Sensor — Mount the return--air enthalpy sensor (HH57AC078) in the return--air duct. The return air sensor is wired to the enthalpy controller (HH57AC077). See Fig. 37.

To wire the return air enthalpy sensor, perform the following:

1. Use a 2--conductor, 18 or 20 AWG, twisted pair c able to connect the return air enthalpy sensor to the enthalpy controller.

2. At the enthalpy control remove the factory--installed resistor from the (SR) and (+) terminals.

3. Connect the field--supplied RED wire to (+) spade connector on the return air enthalpy sensor and the (SR+) terminal on the enthalpy controller. Connect the BLK wire to (S) spade connector on the return a ir

enthalpy sensor and the (SR) terminal on the enthalpy controller.

NOTE: The enthalpy control must be set to the “D” setting for differential enthalpy control to work properly.

Indoor Air Quality (CO sensor accessory monitors space carbon dioxide (CO

sensor) — The indoor air quality

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 CO

The CO

present in the space air.

sensors are all fac tory 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 CO

sensor for electrical

requirements and terminal locations. See Fig. 38 for typical CO

sensor wiring schematic.

with an outdoor cover. See Fig. 40. The outdoor air CO sensor must be located in the economizer outside air hood.

Wiring the Outdoor Air CO

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 t he 4 to 20 mA terminal to RTU--MP J4--5. Connect the SIG COM terminal to RTU--MP J4--6.

OAQ Sensor/RH Sensor

SEN

J4-5

To accurately monitor the quality of the air in the

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conditioned air space, locate the sensor near a return--air grille (if present) so it senses the concentration of CO leaving the space. The sensor should be mounted in a location to avoid direct breath contact.

Wiring the Indoor Air Quality Sensor —

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--MP J4--2 and connect the SIG COM terminal to RTU--MP J4--3. See Fig. 53.

IAQ Sensor

SEN

COM

24 VAC

Fig. 53 -- RTU--MP / Indoor CO2Sensor

(33ZCSENCO2) Connections

Outdoor Air Quality Sensor (PNO 33ZCSENCO2 plus weatherproof enclosure) — The outdoor air CO designed to monitor carbon di oxide (CO

) levels in the

outside ventilation air and interface with the ventilation damper in an HVAC system. The OAQ sensor is packaged

J4-2

J4-3

sensor is

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COM

24 VAC

Fig. 54 -- RTU--MP / Outdoor CO2Sensor

(33ZCSENCO2) Connections

On 50TCQ units equipped with factory--instal led 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--MP controller communicates the smoke detector’s tripped status to the BAS building control. See Fig. 30, the PremierLink wiring schematic.

The Fire Shutdown Switch configura tion,

→

Config→Inputs→input 5, identifies the

normally open status of this input when there is no fire alarm.

Connecting Discrete Inputs

Status

Filter

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→input3,5,8,or9

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. 49 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

→

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. 49 for wire terminations at J5.

Config→Inputs→input3,5,8,or9to Fan

J4-6

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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)

Connect the accessory Power Exhaust contactor coil(s) per Fig. 55.

Power Exhaust

PEC

TAN

J11-3

CTB

THERMOSTAT

GRA

Fig. 55 -- RTU--MP Power Exhaust Connections

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Space Relative Humidity Sensor -- The RH sensor is not used with 50TCQ models at this time.

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--MP 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. 56 for the switch setting per protocol. The 3rd party connection to the RTU--MP is through plug J19.

NOTE: Power must be cycled after changing the SW1--3 switch settings.

Refer to t he RTU--MP 3rd Party Integration Guide for more detailed information on protocols, 3rd party wiring, and networking.

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SW3 Protocol Selection

PROTOCOL DS8 DS7 DS6 DS5 DS4 DS3 DS2 DS1

BACnet MS/TP (Master)

Modbus (Slave)

N2 (Slave)

LonWorks Unused ON ON OFF ON OFF OFF OFF

NOTE: DS = Dip Switch BACnet MS/TP SW3 example shown

BAUD RATE DS2 DS1

9600 OFF OFF

19,200 ON OFF

38,400 OFF ON

76,800 ON ON

Unused OFF OFF OFF ON OFF Select Baud Select Baud

Unused OFF OFF ON ON OFF Select Baud Select Baud

Unused OFF OFF OFF ON ON OFF OFF

Baud Rate Selections

Fig. 56 -- RTU--MP SW3 Dip Switch Settings

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Local Access

BACview6Handheld

The BACview6is a keypad/display interface used to connect to the RTU--MP 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 MP controller and can only be used at the unit. Connect the BACview are 2 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--50H--T--2T, Appendix A for navigation and screen content.

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to the RTU--MP’s J12 local access port. There

Virtual BACview

Virtual BACview is a freeware computer program that

functions as the BACview

Handheld. The USB Li nk interface (USB--L) is required to connect a computer to the RTU--MP board. The link cable connects a USB port to the J12 local access port. This program functions and operates identical to the handheld.

RTU--MP Troubleshooting

Communication

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.

LEDs

Fig. 57 -- BACview6Handheld Connections

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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 and Error LEDs indicate control module and network status

If Run LED shows...

2 flashes per second Off Normal

2 flashes per second

2 flashes per second On

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

14 flashes per second

On On

NOTE: Refer to Form 48-- 50H--T--2T for complete configuration of RTU-- MP, operating sequences and troubleshooting information. Refer to RTU--MP 3rd Party Integration Guide for details on configuration and troubleshooting of connected networks. Have a copy of these manuals available at unit start--up.

And Error LED shows... Status is...

2flashes, alternating with Run LED

3flashes, then off

4flashes, then pause

7 flashes per second, alternating with Run LED

14 flashes per second, alternating with Run LED

Five minute auto --- restart delay after system error

Control module has just been formatted

Two or more devices on this network have the same ARC156 network address

Exec halted after frequent system errors or control programs halted

Ten second recovery period after brownout

Brownout

Failure. Try the following solutions:

S Turn the RTU ---MP off, then on. S F or ma t t h e R T U --- M P. S Download memory to the RTU---MP. S Replace the RTU--- MP.

System

The smoke detector system consists of a four--wire controller and one or two sensors. Its primary function is to shut down the rooftop unit in order to prevent smoke from circulating throughout the building. It is not to be used as a life saving device.

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SMOKE DETECTORS

Smoke detectors are available as factory--installed options on 50TCQ 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 Ret urn Air. Return Air smoke detectors are arranged for vertical return configurations only. All components necessary for operation are factory--provided and mounted. 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.

Units equipped with factory--opt ional Return Air smoke detectors require a relocation of the sensor module at unit installation. See “Completing Installation of Return Air

Smoke Sensor:” on page 35 for details.

Controller

The controller (see Fig. 58) includes a controller housing, a printed circuit board, and a clear plastic cover. The controller can be connected to one or two compatible duct smoke sensors. The clear plastic cover is secured to the housing with a single captive screw for easy access to the wiring terminals. The controller has three LEDs (for Power, Trouble and Alarm) and a manual test/reset button (on the cover face).

Sensor

The sensor (see Fig. 59) includes a plastic housing, a printed circuit board, a clear plastic cover, a sampling tube inlet and an exhaust tube. The sampling tube (when used) and exhaust tube are attached during installation. The sampling tube varies in length depending on the size of the rooftop unit. The clear plastic cover permits visual inspections without having to disassemble the sensor. The cover attaches to the sensor housing using four captive screws and forms an airtight chamber around the sensing electronics. Each sensor includes a harness with an RJ45

terminal for connecting to the controller. Each sensor has four LEDs (for Power, Trouble, Alarm and Dirty) and a manual test/reset button (on the left--side of the housing).

Duct smoke sensor

Exhaust tube

Duct smoke sensor

controller

Conduit nuts

(supplie d by installer)

Conduit s upport plate

Terminal block cover

Troub le

Power

Tes t / r e s e t switch

Cover gasket

(ordering option)

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Controll er housing

and electronics

Conduit c ouplings

(supplie d by installer)

Alarm

Fastener

(2X)

Fig. 58 -- Controller Assembly

Air is introduced to the duct smoke detector sensor’s sensing chamber through a sampling tube that extends into the HVAC duct and is directed back into the ventilation system through a (shorter) exhaust tube. The difference in air pressure between the two tubes pulls the sampled air through the sensing chamber. Whe n a sufficient amount of smoke is detected in the sensing chamber, the sensor signals an alarm state and the controller automatically takes the appropriate action to shut down fans and blowers, change over air ha ndling systems, notify the fire alarm control panel, etc.

Controll er cover

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See

Detail A

Intake

gasket

Plug

TSD-CO2

(ordering option)

Sampling tube

(ordered separately)

Magnetic test/reset

switch

Exhaust gasket

Coupling

Alarm

Troub le

Sensor housing and electro nics

Power Dirty

Cover gasket

(ordering option)

Sensor cover

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Fig. 59 -- Smoke Detector Sensor

Smoke Detector Locations

Supply Air — The Supply Air smoke detector sensor is located to the left of the unit’s indoor (supply) fan. See Fig. 60. Access is through the fan access panel. There is no sampling tube used at this location. The sampling tube inlet extends through the side plate of the fan housing (into a high pressure area). The controller is located on a bracket to the right of the return filter, accessed through the lift--off filter panel.

The sensor uses a process called differential sensing to prevent gradual environmental changes from triggeri ng false alarms. A rapid change in environmental conditions, such as smoke from a fire, causes the sensor to signal an alarm state but dust and debris accumulated over time does not.

For installations using two sensors, the duct smoke detector does not differentiate which sensor signals an alarm or trouble condition.

Smoke Detector Sensor

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Fig. 60 -- Typical Supply Air Smoke Detector Sensor

Location

Return Air without Economizer — The sampling tube is located across the return air opening on the unit basepan. See Fig. 61. The holes in the sampling tube face

downward, into the return air stream. The sampling tube is connected via tubing to the return air sensor that is mounted on a bracket high on the partition between return filter and controller location. (This sensor is shipped in a flat--mounting location. Installation requires that this sensor be relocated to its operating location and the tubing to the sampling tube be connected. See “Completing Installation of Return Air Smoke Sensor:” for details.)

Return Air Detector module (shipping position shown)*

Controller module

Return Air Detector Sampling Tube

*RA detector must be moved from shipping position to operating position by installer

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Fig. 61 -- Typical Return Air Detector Location

Return Air with Economizer — The sampling tube is inserted through the side plates of the economizer housing, placing it across the return air opening on the unit basepan. See Fig. 61. The holes in the sampling tube face downward, into the return air stream. The sampling tube is connected via tubing to the return air sensor that is mounted on a bracket high on the partition between return filter and controller location. (This sensor is shipped in a flat--mounting location. Installation requires that this sensor be relocated to its operating location and the tubing to the sampling tube be connected. See the following installation procedure.)

Completing Installation of Return Air Smoke Sensor:

1. Unscrew the two screws holding the Return Air Sensor detector plate. See Fig. 63. Save the scr ews.

2. Remove the Re turn Air Sensor and its detector plate.

3. Rotate the detector plate so the sensor is facing outwards and the sampling tube connection is on the bottom. See Fig. 64.

4. Screw the sensor and detector plate into its operating position using screws from Step 1. Make sure the sampling tube connection is on the bottom and the exhaust tube is on the top. See Fig. 64.

5. Connect the flexible tube on the sampling inlet to the sampling tube on the basepan.

Screws

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Flexible Exhaust Tubes

Sample Tube

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Fig. 63 -- Return Air Detector Shipping Position

Return Air Sampling Tube

Fig. 62 -- Return Air Sampling Tube Location

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Fig. 64 -- Return Air Sensor Operating Position

Additional Application Data — Refer to Catalog No. HKRNKA--1XA for discussions on additional control features of these smoke detectors including multiple unit coordination.

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Table 10 – Unit Wire/MOCP Sizing Data

ELECTRIC HEATER NO C.O. or UNPWRD C.O.

IFM

UNIT

TYPE

N O M . V --- P H --- H Z

STD

208/230--- 1 --- 60

STD

50TCQA

MED

208/230--- 3 --- 60

HIGH

50TCQ*04

STD

MED

4 6 0 --- 3 --- 6 0

HIGH

STD --- --- 5.4 15 5 5 7.4 20 15 7

MED --- --- 3.4 15 3 8 5.4 20 15 10

HIGH --- --- 2.9 15 3 12 4.9 20 15 14

5 7 5 --- 3 --- 6 0

Nom

(kW)

--- --- 30.7 45 30 121 32.6 50 32 123

3.3/4.4 15.9/18.3 50.6/53.6 60/60 48/51 137/139 52.5/55.5 60/60 51/53 139/141

4.9/6.5 23.5/27.1 60.1/64.6 70/70 57/61 145/148 62.0/66.5 70/70 59/63 147/150

6.5/8.7 31.4/36.3 69.9/76.1 70/80 66/72 152/157 71.8/78.0 80/80 68/74 154/159

7.9/10.5 37.9/43.8 78.1/85.4 80/90 74/81 159/165 80.0/87.3 80/90 76/83 161/167

9.8/13.0 46.9/54.2 89.3/98.4 90/100 84/92 215/229 91.2/100.3 100/110 86/95 217/231

--- --- 24.8 30 25 97 26.7 30 27 99

3.3/4.4 9.2/10.6 36.3/38.1 45/45 35/37 106/108 38.2/40.0 45/50 37/39 108/110

4.9/6.5 13.6/15.6 41.8/44.3 50/50 40/43 111/113 43.7/46.2 50/50 43/45 113/115

6.5/8.7 18.1/20.9 47.4/50.9 50/60 46/49 115/118 49.3/52.8 50/60 48/51 117/120

7.9/10.5 21.9/25.3 52.2/56.4 60/60 50/54 119/122 54.1/58.3 60/60 52/56 121/124

12.0/16.0 33.4/38.5 66.6/72.9 70/80 63/69 130/136 68.5/74.8 70/80 65/71 132/138

--- --- 22.6 30 22 109 24.5 30 24 111

3.3/4.4 9.2/10.6 34.1/35.9 45/45 33/34 118/120 36.0/37.8 45/45 35/37 120/122

4.9/6.5 13.6/15.6 39.6/42.1 45/50 38/40 123/125 41.5/44.0 50/50 40/42 125/127

6.5/8.7 18.1/20.9 45.2/48.7 50/50 43/46 127/130 47.1/50.6 50/60 45/48 129/132

7.9/10.5 21.9/25.3 50.0/54.2 50/60 47/51 131/134 51.9/56.1 60/60 50/53 133/136

12.0/16.0 33.4/38.5 64.4/70.7 70/80 61/66 142/148 66.3/72.6 70/80 63/69 144/150

--- --- 22.6 30 22 120 24.5 30 24 122

3.3/4.4 9.2/10.6 34.1/35.9 45/45 33/34 129/131 36.0/37.8 45/45 35/37 131/133

4.9/6.5 13.6/15.6 39.6/42.1 45/50 38/40 134/136 41.5/44.0 50/50 40/42 136/138

6.5/8.7 18.1/20.9 45.2/48.7 50/50 43/46 138/141 47.1/50.6 50/60 45/48 140/143

7.9/10.5 21.9/25.3 50.0/54.2 50/60 47/51 142/145 51.9/56.1 60/60 50/53 144/147

12.0/16.0 33.4/38.5 64.4/70.7 70/80 61/66 153/159 66.3/72.6 70/80 63/69 155/161

--- --- 16.0 20 16 53 17.0 20 17 54

6.0 7.2 25.0 30 24 60 26.0 30 26 61

8.8 10.6 29.3 30 28 64 30.3 35 30 65

11.5 13.8 33.3 35 32 67 34.3 35 33 68

14.0 16.8 37.0 40 36 70 38.0 40 37 71

--- --- 10.6 15 10 54 11.6 15 12 55

6.0 7.2 19.6 20 19 61 20.6 25 20 62

8.8 10.6 23.9 25 23 65 24.9 25 24 66

11.5 13.8 27.9 30 26 68 28.9 30 27 69

14.0 16.8 31.6 35 30 71 32.6 35 31 72

--- --- 10.6 15 10 60 11.6 15 12 61

6.0 7.2 19.6 20 19 67 20.6 25 20 68

8.8 10.6 23.9 25 23 71 24.9 25 24 72

11.5 13.8 27.9 30 26 74 28.9 30 27 75

14.0 16.8 31.6 35 30 77 32.6 35 31 78

FLA

MCA MOCP

NO P.E. w/ P.E. (pwrd fr/unit)

DISC. SIZE

MCA MOCP

FLA LRA FLA LRA

DISC. SIZE

NOTE: See page 44 for table legend and notes.

Table 10 — Unit Wire/MOCP Sizing Data (cont)

ELECTRIC HEATER w/ PWRD C.O.

IFM

UNIT

50TCQ*04

TYPE

N O M . V --- P H --- H Z

STD

208/230--- 1 --- 60

STD

MED

208/230--- 3 --- 60

HIGH

STD

MED

4 6 0 --- 3 --- 6 0

HIGH

STD --- --- 7.1 15 7 7 9.5 15 9 9

MED --- --- 5.1 15 5 10 7.5 15 7 12

HIGH --- --- 4.6 15 5 14 7.0 15 7 16

5 7 5 --- 3 --- 6 0

Nom

(kW)

--- --- 35.5 50 36 126 37.4 50 38 128

3.3/4.4 15.9/18.3 55.4/58.4 60/60 54/57 142/144 57.3/60.3 60/70 56/59 144/146

4.9/6.5 23.5/27.1 64.9/69.4 70/80 63/67 150/153 66.8/71.3 70/80 65/69 152/155

6.5/8.7 31.4/36.3 74.7/80.9 80/90 72/77 157/162 76.6/82.8 80/90 74/80 159/164

7.9/10.5 37.9/43.8 82.9.90.2 90/100 79/86 164/170 84.8/92.1 90/100 81/88 166/172

9.8/13.0 46.9/54.2 94.1/103.2 100/110 90/98 220/234 96.0/105.1 100/110 92/100 222/236

--- --- 29.6 40 30 102 31.5 40 32 104

3.3/4.4 9.2/10.6 41.1/42.9 50/50 41/42 111/113 43.0/44.8 50/50 43/45 113/115

4.9/6.5 13.6/15.6 46.6/49.1 50/50 46/48 116/118 48.5/51.0 50/60 48/50 118/120

6.5/8.7 18.1/20.9 52.2/55.7 60/60 51/54 120/123 54.1/57.6 60/60 53/56 122/125

7.9/10.5 21.9/25.3 57.0/61.2 60/70 55/59 124/127 58.9/63.1 60/70 58/62 126/129

12.0/16.0 33.4/38.5 71.4/77.7 80/80 69/75 135/141 73.3/79.6 80/80 71/77 137/143

--- --- 27.4 40 28 114 29.3 40 30 116

3.3/4.4 9.2/10.6 38.9/40.7 45/50 38/40 123/125 40.8/42.6 50/50 40/42 125/127

4.9/6.5 13.6/15.6 44.4/46.9 50/50 43/46 128/130 46.3/48.8 50/50 46/48 130/132

6.5/8.7 18.1/20.9 50.0/53.5 60/60 49/52 132/135 51.9/55.4 60/60 51.54 134/137

7.9/10.5 21.9/25.3 54.8/59.0 60/60 53/57 136/139 56.7/60.9 60/70 55/59 138/141

12.0/16.0 33.4/38.5 69.2/75.5 70/80 66/72 147/153 71.1/77.4 80/80 68/74 149/155

--- --- 27.4 40 28 125 29.3 40 30 127

3.3/4.4 9.2/10.6 38.9/40.7 45/50 38/40 134/136 40.8/42.6 50/50 40/42 136/138

4.9/6.5 13.6/15.6 44.4/46.9 50/50 43/46 139/141 46.3/48.8 50/50 46/48 141/143

6.5/8.7 18.1/20.9 50.0/53.5 60/60 49/52 143/146 51.9/55.4 60/60 51/54 145/148

7.9/10.5 21.9/25.3 54.8/59.0 60/60 53/57 147/150 56.7/60.9 60/70 55/59 149/152

12.0/16.0 33.4/38.5 69.2/75.5 70/80 66/72 158/164 71.1/77.4 80/80 68/74 160/166

--- --- 18.2 25 19 55 19.2 25 20 56

6.0 7.2 27.2 30 27 62 28.2 30 28 63

8.8 10.6 31.5 35 31 66 32.5 35 32 67

11.5 13.8 35.5 40 35 69 36.5 40 36 70

14.0 16.8 39.2 40 38 72 40.2 45 39 73

--- --- 12.8 15 13 56 13.8 20 14 57

6.0 7.2 21.8 25 21 63 22.8 25 22 64

8.8 10.6 26.1 30 25 67 27.1 30 26 68

11.5 13.8 30.1 35 29 70 31.1 35 30 71

14.0 16.8 33.8 35 32 73 34.8 35 33 74

--- --- 12.8 15 13 62 13.8 20 14 63

6.0 7.2 21.8 25 21 69 22.8 25 22 70

8.8 10.6 26.1 30 25 73 27.1 30 26 74

11.5 13.8 30.1 35 29 76 31.1 35 30 77

14.0 16.8 33.8 35 32 79 34.8 35 33 80

FLA

MCA MOCP

NO P.E. w/ P.E. (pwrd fr/unit)

DISC. SIZE

MCA MOCP

FLA LRA FLA LRA

DISC. SIZE

50TCQA

NOTE: See page 44 for table legend and notes.

Table 10 — Unit Wire/MOCP Sizing Data (cont)

ELECTRIC HEATER NO C.O. or UNPWRD C.O.

IFM

UNIT

50TCQA

50TCQ*05

TYPE

N O M . V --- P H --- H Z

STD

208/230--- 1 --- 60

STD

208/230--- 3 --- 60

MED

208/230--- 3 --- 60

HIGH

STD

MED

4 6 0 --- 3 --- 6 0

HIGH

STD --- --- 10.6 15 11 43 12.5 15 13 45

MED --- --- 9.0 15 9 46 10.9 15 11 48

HIGH --- --- 8.6 15 9 50 10.5 15 11 52

5 7 5 --- 3 --- 6 0

Nom

(kW)

--- --- 36.2 50 35 128 38.1 50 37 130

3.3/4.4 15.9/18.3 56.0/59.0 60/60 54/56 144/146 57.9/60.9 60/70 56/59 146/148

6.5/8.7 31.4/36.3 75.4/81.5 80/90 71/77 159/164 77.3/83.4 80/90 74/79 161/166

9.8/13.0 46.9/54.2 94.8/103.9 100/110 89/98 222/236 96.7/105.8 100/110 91/100 224/238

13.1/17.4 62.8/72.5 114.7/126.8 125/150 108/119 254/273 166.6/128.7 125/150 110/121 256/275

15.821.0 75.8/87.5 130.9/145.5 150/150 122/136 280/303 132.8/147.4 150/150 125/138 282/305

--- --- 26.0 30 26 94 27.9 40 28 96

4.9/6.5 13.6/15.6 43.0/45.5 50/50 42/44 108/110 44.9/47.4 50/50 44/46 110/112

6.5/8.7 18.1.20.9 48.7/52.2 50/60 47/50 112/115 50.6/54.1 60/60 49/52 114/117

12.0/16.0 33.4/38.5 67.8/74.2 70/80 64/70 127/133 69.7/76.1 70/80 67/72 129/135

15.8/21.0 43.8/50.5 80.8/98.2 90/90 76/84 182/195 82.7/91.1 90/100 79/86 184/197

--- --- 23.8 30 23 106 25.7 30 26 108

4.9/6.5 13.6/15.6 40.8/43.3 50/50 39/41 120/122 42.7/45.2 50/50 41/44 122/124

6.5/8.7 18.1.20.9 46.5/50.0 50/50 44/47 124/127 48.4/51.9 50/60 46/50 126/129

12.0/16.0 33.4/38.5 65.6/72.0 70/80 62/68 139/145 67.5/73.9 70/80 64/70 141/147

15.8/21.0 43.8/50.5 78.6/87.0 80/90 74/82 194/207 80.5/88.9 90/90 76/84 196/209

--- --- 23.8 30 23 117 25.7 30 26 119

4.9/6.5 13.6/15.6 40.8/43.3 50/50 39/41 131/133 42.7/45.2 50/50 41/44 133/135

6.5/8.7 18.1.20.9 46.5/50.0 50/50 44/47 135/138 48.4/51.9 50/60 46/50 137/140

12.0/16.0 33.4/38.5 65.6/72.0 70/80 62/68 150/156 67.5/73.9 70/80 64/70 152/158

15.8/21.0 43.8/50.5 78.6/87.0 80/90 74/82 202/218 80.5/88.9 90/90 76/84 207/220

--- --- 16.5 20 17 51 17.5 25 18 52

6.0 7.2 25.5 30 25 58 26.5 30 26 59

11.5 13.8 33.8 35 33 65 34.8 35 34 66

14.0 16.8 37.5 40 36 68 38.5 40 37 69

23.0 27.7 51.1 60 49 106 52.1 60 50 107

--- --- 11.2 15 11 52 12.2 15 12 53

6.0 7.2 20.2 25 19 59 21.2 25 20 60

11.5 13.8 28.4 30 27 66 29.4 30 28 67

14.0 16.8 32.2 35 30 69 33.2 35 32 70

23.0 27.7 45.8 50 43 107 46.8 50 44 108

--- --- 11.2 15 11 58 12.2 15 12 59

6.0 7.2 20.2 25 19 65 21.2 25 20 66

11.5 13.8 28.4 30 27 72 29.4 30 28 73

14.0 16.8 32.2 35 30 75 33.2 35 32 76

23.0 27.7 45.8 50 43 113 46.8 50 44 114

FLA

MCA MOCP

NO P.E. w/ P.E. (pwrd fr/unit)

DISC. SIZE

MCA MOCP

FLA LRA FLA LRA

DISC. SIZE

NOTE: See page 44 for table legend and notes.

Table 10 — Unit Wire/MOCP Sizing Data (cont)

ELECTRIC HEATER w/ PWRD C.O.

IFM

UNIT

50TCQ*05

TYPE

N O M . V --- P H --- H Z

STD

208/230--- 1 --- 60

STD

MED

208/230--- 3 --- 60

HIGH

STD

MED

4 6 0 --- 3 --- 6 0

HIGH

STD --- --- 12.3 15 13 45 14.2 20 15 47

MED --- --- 10.7 15 11 48 12.6 15 13 50

HIGH --- --- 10.3 15 10 52 12.2 15 13 54

5 7 5 --- 3 --- 6 0

Nom

(kW)

--- --- 41.0 60 41 133 42.9 60 43 135

3.3/4.4 15.9/18.3 60.8/63.8 70/80 59/62 149/151 62.7/65.7 80/80 61/64 151/153

6.5/8.7 31.4/36.3 80.2/86.3 90/90 77/83 164/169 82.1/88.2 90/100 79/85 166/171

9.8/13.0 46.9/54.2 99.6/108.7 100/110 95/103 227/241 101.5/110.6 110/125 97/105 229/243

13.1/17.4 62.8/72.5 119.5/131.6 125/150 113/124 259/278 121.4/133.5 125/150 115/126 261/280

15.821.0 75.8/87.5 135.7/150.3 150/175 128/141 285/308 137.6/152.2 150/175 130/144 287/310

--- --- 30.8 40 32 99 32.7 45 34 101

4.9/6.5 13.6/15.6 47.8/50.3 50/60 47/49 113/115 49.7/52.5 60/60 49/52 115/117

6.5/8.7 18.1.20.9 53.5/57.0 60/60 52/56 117/120 55.4/58.9 60/60 55/58 119/122

12.0/16.0 33.4/38.5 72.6/79.0 80/80 70/76 132/138 74.5/80.9 80/90 72/78 134/140

15.8/21.0 43.8/50.5 85.6/94.0 90/100 82/90 187/200 87.5/95.9 90/100 84/92 189/202

--- --- 28.6 40 29 111 30.5 40 31 113

4.9/6.5 13.6/15.6 45.6/48.1 50/50 45/47 125/127 47.5/50.0 50/60 47/49 127/129

6.5/8.7 18.1.20.9 51.3/54.8 60/60 50/53 129/132 53.2/56.7 60/60 52/55 131/134

12.0/16.0 33.4/38.5 70.4/76.8 80/80 67/73 144/150 72.3/78.7 80/80 70/75 146/152

15.8/21.0 43.8/50.5 83.4/91.8 90/100 79/87 199/212 85.3/93.7 90/100 82/89 201/214

--- --- 28.6 40 29 122 30.5 40 31 124

4.9/6.5 13.6/15.6 45.6/48.1 50/60 45/47 136/138 47.5/50.0 50/60 47/49 138/140

6.5/8.7 18.1.20.9 51.3/54.8 60/60 50/53 140/143 53.2/56.7 60/60 52/55 142/145

12.0/16.0 33.4/38.5 70.4/76.8 80/80 67/73 155/161 72.3/78.7 80/80 70/75 157/163

15.8/21.0 43.8/50.5 83.4/91.8 80/90 79/87 210/223 85.3/93.7 90/100 82/89 212/225

--- --- 18.7 25 19 53 19.7 25 20 54

6.0 7.2 27.7 30 28 60 28.7 30 29 61

11.5 13.8 36.0 40 35 67 37.0 40 36 68

14.0 16.8 39.7 40 39 70 40.7 45 40 71

23.0 27.7 53.3 60 51 108 54.3 60 52 109

--- --- 13.4 15 14 54 14.4 20 15 55

6.0 7.2 22.4 25 22 61 23.4 25 23 62

11.5 13.8 30.6 35 29 68 31.6 35 31 69

14.0 16.8 34.4 35 33 71 35.4 40 34 72

23.0 27.7 48.0 50 45 109 49.0 50 47 110

--- --- 13.4 15 14 60 14.4 20 15 61

6.0 7.2 22.4 25 22 67 23.4 25 23 68

11.5 13.8 30.6 35 29 74 31.6 35 31 75

14.0 16.8 34.4 35 33 77 35.4 40 34 78

23.0 27.7 48.0 50 45 115 49.0 50 47 116

FLA

MCA MOCP

NO P.E. w/ P.E. (pwrd fr/unit)

DISC. SIZE

MCA MOCP

FLA LRA FLA LRA

DISC. SIZE

50TCQA

NOTE: See page 44 for table legend and notes.

Table 10 — Unit Wire/MOCP Sizing Data (cont)

ELECTRIC HEATER NO C.O. or UNPWRD C.O.

IFM

UNIT

TYPE

N O M . V --- P H --- H Z

STD

208/230--- 1 --- 60

STD

50TCQA

MED

208/230--- 3 --- 60

HIGH

50TCQ*06

STD

MED

4 6 0 --- 3 --- 6 0

HIGH

STD --- --- 11.9 15 12 45 13.8 20 14 47

MED --- --- 9.9 15 10 52 11.8 15 12 54

HIGH --- --- 10.7 15 11 63 12.6 15 13 65

5 7 5 --- 3 --- 6 0

Nom

(kW)

--- --- 41.7 60 40 145 43.6 60 43 147

4.9/6.5 23.5/27.1 71.0/75.5 80/80 67/72 169/172 72.9/77.4 80/80 70/74 171/174

6.5/8.7 31.4/36.3 80.9/87.0 90/100 76/82 176/181 82.8/88.9 100/100 79/84 178/183

9.8/13.0 46.9/54.2 100.3/109.4 110/110 94/103 239/253 102.2/111.3 110/125 96/105 241/255

13.1/17.4 62.8/72.5 120.2/132.3 125/150 113/124 271/290 122.1/134.2 125/150 115/126 273/292

15.821.0 75.8/87.5 136.4/151.0 150/175 128/141 297/320 138.3/152.9 150/175 130/143 299/322

--- --- 28.4 40 28 121 30.3 45 30 123

4.9/6.5 13.6/15.6 45.4/47.9 50/50 44/46 135/137 47.3/49.8 50/60 46/48 137/139

7.9/10.5 21.9/25.3 55.8/60.0 60/70 53/57 143/146 57.7/61.9 60/70 56/59 145/148

12.0/16.0 33.4/38.5 70.2/76.5 80/80 67/72 154/160 72.1/78.4 80/80 69/75 156/162

15.8/21.0 43.8/50.5 83.2/91.5 90/100 79/86 209/222 85.1/93.4 90/100 81/88 211/224

19.9/26.5 55.2/63.8 97.4/108.2 100/110 92/102 231/249 99.3/110.1 100/125 94/104 233/251

--- --- 26.2 40 26 144 28.1 40 28 146

4.9/6.5 13.6/15.6 43.2/45.7 50/50 41/44 158/160 45.1/47.6 50/50 43/46 160/162

7.9/10.5 21.9/25.3 53.6/57.8 60/60 51/55 166/169 55.5/59.7 60/60 53/57 168/171

12.0/16.0 33.4/38.5 68.0/74.3 70/80 64/70 177/183 69.9/76.2 70/80 66/72 179/185

15.8/21.0 43.8/50.5 81.0/89.3 90/90 76/84 232/245 82.9/91.2 90/100 78/86 234/247

19.9/26.5 55.2/63.8 95.2/106.0 100/110 89/99 254/272 97.1/107.9 100/110 91/101 256/274

--- --- 28.5 40 28 170 30.4 45 30 172

4.9/6.5 13.6/15.6 45.5/48.0 50/50 44/46 184/186 47.4/49.9 50/60 46/48 186/188

7.9/10.5 21.9/25.3 55.9/60.1 60/70 53/57 192/195 57.8/62.0 60/70 56/60 194/197

12.0/16.0 33.4/38.5 70.3/76.6 80/90 67/73 203/209 72.2/78.5 80/80 69/75 205/211

15.8/21.0 43.8/50.5 83.3/91.6 90/100 79/86 258/271 85.2/93.5 90/100 81/89 260/273

19.9/26.5 55.2/63.8 97.5/108.3 100/110 92/102 280/298 99.4/110.2 100/125 94/104 282/300

--- --- 18.0 25 19 62 19.0 25 20 63

6.0 7.2 27.0 30 27 69 28.0 30 28 70

11.5 13.8 35.3 40 34 76 36.3 40 36 77

14.0 16.8 39.0 40 38 79 40.0 45 39 80

23.0 27.7 52.7 60 50 117 53.7 60 52 118

25.5 30.7 56.4 60 54 123 57.4 60 55 124

--- --- 13.0 20 13 69 14.0 20 14 70

6.0 7.2 22.0 25 21 76 23.0 25 22 77

11.5 13.8 30.3 35 29 83 31.3 35 30 84

14.0 16.8 34.0 35 32 86 35.0 40 33 87

23.0 27.7 47.7 50 45 124 48.7 50 46 125

25.5 30.7 51.4 50 48 130 52.4 60 49 131

--- --- 13.8 20 14 82 14.8 20 15 83

6.0 7.2 22.8 25 22 89 23.8 25 23 90

11.5 13.8 31.1 35 30 96 32.1 35 31 97

14.0 16.8 34.8 35 33 99 35.8 40 34 100

23.0 27.7 48.5 50 46 137 49.5 50 47 138

25.5 30.7 52.2 60 49 143 53.2 60 50 144

FLA

MCA MOCP

NO P.E. w/ P.E. (pwrd fr/unit)

DISC. SIZE

MCA MOCP

FLA LRA FLA LRA

DISC. SIZE

NOTE: See page 44 for table legend and notes.

Table 10 — Unit Wire/MOCP Sizing Data (cont)

ELECTRIC HEATER w/ PWRD C.O.

IFM

UNIT

50TCQ*06

TYPE

N O M . V --- P H --- H Z

STD

208/230--- 1 --- 60

STD

MED

208/230--- 3 --- 60

HIGH

STD

MED

4 6 0 --- 3 --- 6 0

HIGH

STD --- --- 13.6 15 14 47 15.5 20 16 49

MED --- --- 11.6 15 12 54 13.5 15 14 56

HIGH --- --- 12.4 15 13 65 14.3 20 15 67

5 7 5 --- 3 --- 6 0

Nom

(kW)

--- --- 46.5 60 46 150 48.4 60 48 152

4.9/6.5 23.5/27.1 75.8/80.3 80/90 73/77 174/177 77.7/82.2 80/100 75/79 176/179

6.5/8.7 31.4/36.3 85.7/91.8 100/100 82/88 181/186 87.7/93.7 100/100 84/90 183/188

9.8/13.0 46.9/54.2 105.1/114.2 110/125 100/108 244/258 107.0/116.1 110/125 102/110 246/260

13.1/17.4 62.8/72.5 125.0/137.1 125/150 118/129 276/295 126.9/139.0 150/150 120/131 278/297

15.821.0 75.8/87.5 141.2/155.8 150/175 133/147 302/325 143.1/157.7 150/175 135/149 304/327

--- --- 33.2 45 34 126 35.1 50 36 128

4.9/6.5 13.6/15.6 50.2/52.7 60/60 49/52 140/142 52.1/54.6 60/60 52/54 142/144

7.9/10.5 21.9/25.3 60.6/64.8 70/70 59/63 148/151 62.5/66.7 70/70 61/65 150/153

12.0/16.0 33.4/38.5 75.0/81.3 80/90 72/78 159/165 76.9/83.2 80/90 74/80 161/167

15.8/21.0 43.8/50.5 88.0/96.3 90/100 84/92 214/227 89.9/98.2 90/100 86/94 216/229

19.9/26.5 55.2/63.8 102.2/113.0 110/125 97/107 236/254 104.1/114.9 110/125 99/109 238/256

--- --- 31.0 45 31 149 32.9 45 33 151

4.9/6.5 13.6/15.6 48.0/50.5 60/60 47/49 163/165 49.9/52.4 60/60 49/51 165/167

7.9/10.5 21.9/25.3 58.4/62.6 60/70 56/60 171/174 60.3/64.5 70/70 59/62 173/176

12.0/16.0 33.4/38.5 72.8/79.1 80/80 70/75 182/188 74.7/81.0 80/90 72/78 184/190

15.8/21.0 43.8/50.5 85.8/94.1 90/100 82/89 237/250 87.7/96.0 90/100 84/91 239/252

19.9/26.5 55.2/63.8 100.0/110.8 100/125 95/105 259/277 101.9/112.7 110/125 97/107 261/279

--- --- 33.3 45 34 175 35.2 50 36 177

4.9/6.5 13.6/15.6 50.3/52.8 60/60 49/52 189/191 52.2/54.7 60/60 52/54 191/193

7.9/10.5 21.9/25.3 60.7/64.9 70/70 59/63 197/200 62.6/66.8 70/70 61/65 199/202

12.0/16.0 33.4/38.5 75.1/81.4 80/90 72/78 208/214 77.0/83.3 80/90 74/80 210/216

15.8/21.0 43.8/50.5 88.1/96.4 90/100 84/92 263/276 90.0/98.3 90/100 86/94 265/278

19.9/26.5 55.2/63.8 102.3/113.1 110/125 97/107 285/303 104.2/115.0 110/125 99/109 287/305

--- --- 20.2 25 21 64 21.2 25 22 65

6.0 7.2 29.2 30 29 71 30.2 35 30 72

11.5 13.8 37.5 40 37 78 38.5 40 38 78

14.0 16.8 41.2 45 40 81 42.2 45 42 82

23.0 27.7 54.9 60 53 119 55.9 60 54 120

25.5 30.7 58.6 60 56 125 59.6 60 58 126

--- --- 15.2 20 15 71 16.2 20 16 72

6.0 7.2 24.2 30 24 78 25.2 30 25 79

11.5 13.8 32.5 35 31 85 33.5 35 32 86

14.0 16.8 36.2 40 35 88 37.2 40 36 89

23.0 27.7 49.9 50 47 126 50.9 60 48 127

25.5 30.7 53.6 60 51 132 54.6 60 52 133

--- --- 16.0 20 16 84 17.0 20 17 85

6.0 7.2 25.0 30 24 91 26.0 30 26 92

11.5 13.8 33.3 35 32 98 34.3 35 33 99

14.0 16.8 37.0 40 36 101 38.0 40 37 102

23.0 27.7 50.7 60 48 139 51.7 60 49 140

25.5 30.7 54.4 60 52 145 55.4 60 53 146

FLA

MCA MOCP

NO P.E. w/ P.E. (pwrd fr/unit)

DISC. SIZE

MCA MOCP

FLA LRA FLA LRA

DISC. SIZE

50TCQA

NOTE: See page 44 for table legend and notes.

Table 10 — Unit Wire/MOCP Sizing Data (cont)

ELECTRIC HEATER NO C.O. or UNPWRD C.O.

IFM

UNIT

TYPE

N O M . V --- P H --- H Z

STD

MED

208/230--- 3 --- 60

50TCQA

HIGH

50TCQ*07

STD

MED

4 6 0 --- 3 --- 6 0

HIGH

STD --- --- 12.3 15 12 59 14.2 20 14 61

MED --- --- 12.7 20 12 74 14.6 20 15 76

HIGH --- --- 12.7 20 12 74 14.6 20 15 76

5 7 5 --- 3 --- 6 0

Nom

(kW)

--- --- 30.5 45 30 146 32.4 50 32 148

4.9/6.5 13.6/15.6 47.5/50.0 60/60 45/47 160/162 49.4/51.9 60/60 47/50 162/164

7.9/10.5 21.9/25.3 57.8/62.1 60/70 55/59 168/171 59.7/64.0 60/70 57/61 170/173

12.0/16.0 33.4/38.5 72.2/78.6 80/80 68/74 179/185 74.1/80.5 80/90 70/76 181/187

15.8/21.0 43.8/50.5 85.2/93.6 90/100 80/88 234/247 87.1/95.5 90/100 82/90 236/249

19.9/26.5 55.2/63.8 99.5/110.2 100/125 93/103 256/274 101.4/112.1 110/125 95/105 258/276

--- --- 32.8 50 32 183 34.7 50 34 185

4.9/6.5 13.6/15.6 49.8/52.3 60/60 48/50 197/199 51.5/54.2 60/60 50/52 199/201

7.9/10.5 21.9/25.3 60.1/64.4 70/70 57/61 205/208 62.0/66.3 70/70 60/63 207/210

12.0/16.0 33.4/38.5 74.5/80.9 80/90 71/76 216/222 76.4/82.8 80/90 73/79 218/224

15.8/21.0 43.8/50.5 87.5/95.9 90/100 83/90 271/284 89.4/97.8 90/100 85/92 273/286

19.9/26.5 55.2/63.8 101.8/112.5 110/125 96/106 293/311 103.7/114.4 110/125 98/108 295/313

--- --- 32.8 50 32 183 34.7 50 34 185

4.9/6.5 13.6/15.6 49.8/52.3 60/60 48/50 197/199 51.7/54.2 60/60 50/52 199/201

7.9/10.5 21.9/25.3 60.1/64.4 70/70 57/61 205/208 62.0/66.3 70/70 60/63 207/210

12.0/16.0 33.4/38.5 74.5/80.9 80/90 71/76 216/222 76.4/82.8 80/80 73/79 218/224

15.8/21.0 43.8/50.5 87.5/95.9 90/100 83/90 271/284 89.4/97.8 90/100 85/92 273/286

19.9/26.5 55.2/63.8 101.8/112.5 110/125 96/106 293/311 103.7/114.4 110/125 98/108 295/313

--- --- 15.5 25 15 73 16.5 25 16 74

6.0 7.2 24.4 30 23 80 25.5 30 24 81

11.5 13.8 32.8 35 31 87 33.8 40 32 88

14.0 16.8 36.5 40 34 90 37.5 40 36 91

23.0 27.7 50.2 60 47 128 51.2 60 48 129

25.5 30.7 53.9 60 50 134 54.9 60 52 135

--- --- 16.3 25 16 92 17.3 25 17 93

6.0 7.2 25.3 30 24 99 26.3 30 25 100

11.5 13.8 33.6 35 32 106 34.6 40 33 107

14.0 16.8 37.3 40 35 109 38.3 40 36 110

23.0 27.7 51.0 60 48 147 52.0 60 49 148

25.5 30.7 54.7 60 51 153 55.7 60 52 154

--- --- 16.3 25 16 92 17.3 25 17 93

6.0 7.2 25.3 30 24 99 26.3 30 25 100

11.5 13.8 33.6 35 32 106 34.6 40 33 107

14.0 16.8 37.3 40 35 109 38.3 40 36 110

23.0 27.7 51.0 60 48 147 52.0 60 49 148

25.5 30.7 54.7 60 51 153 55.7 60 52 154

FLA

MCA MOCP

NO P.E. w/ P.E. (pwrd fr/unit)

DISC. SIZE

MCA MOCP

FLA LRA FLA LRA

DISC. SIZE

NOTE: See page 44 for table legend and notes.

Table 10 — Unit Wire/MOCP Sizing Data (cont)

ELECTRIC HEATER w/ PWRD C.O.

IFM

UNIT

50TCQ*07

TYPE

N O M . V --- P H --- H Z

STD

MED

208/230--- 3 --- 60

HIGH

STD

MED

4 6 0 --- 3 --- 6 0

HIGH

STD --- --- 14.0 20 14 61 15.9 20 16 63

MED --- --- 14.4 20 14 76 16.3 20 17 78

HIGH --- --- 14.4 20 14 76 16.3 20 17 78

5 7 5 --- 3 --- 6 0

Nom

(kW)

--- --- 35.3 50 35 151 37.2 50 37 153

4.9/6.5 13.6/15.6 52.3/54.8 60/60 51/53 165/167 54.2/56.7 60/60 53/55 167/169

7.9/10.5 21.9/25.3 62.6/66.9 70/70 60/64 173/176 64.5/68.8 70/80 62/66 175/178

12.0/16.0 33.4/38.5 77.0/83.4 80/90 73/79 184/190 78.9/85.3 80/90 76/82 186/192

15.8/21.0 43.8/50.5 90.0/98.4 90/100 85/93 239/252 91.9/100.3 100/110 88/95 241/254

19.9/26.5 55.2/63.8 104.3.115.0 110/125 99/108 261/279 106.2/116.9 110/125 101/111 263/281

--- --- 37.6 50 38 188 39.5 50 40 190

4.9/6.5 13.6/15.6 54.6/57.1 60/60 53/56 202/204 56.5/59.0 60/60 56/58 204/206

7.9/10.5 21.9/25.3 64.9/69.2 70/80 63/67 210/213 66.8/71.1 80/80 65/69 212/215

12.0/16.0 33.4/38.5 79.3/85.7 80/90 76/82 221/227 81.2/87.6 90/90 78/84 223/229

15.8/21.0 43.8/50.5 92.3/100.7 100/110 88/96 276/289 94.2/102.6 100/110 90/98 278/291

19.9/26.5 55.2/63.8 106.6/117.3 110/125 101/111 298/316 108.5/119.2 110/125 103/113 300/318

--- --- 37.6 50 38 188 39.5 50 40 190

4.9/6.5 13.6/15.6 54.6/57.1 60/60 53/56 202/204 56.5/59.0 60/60 56/58 204/206

7.9/10.5 21.9/25.3 64.9/69.2 70/80 63/67 210/213 66.8/71.1 80/80 65/69 212/215

12.0/16.0 33.4/38.5 79.3/85.7 80/90 76/82 221/227 81.2/87.6 90/90 78/84 223/229

15.8/21.0 43.8/50.5 92.3/100.7 100/110 88/96 276/289 94.2/102.6 100/110 90/98 278/291

19.9/26.5 55.2/63.8 106.6/117.3 110/125 101/111 298/316 108.5/119.2 110/125 103/113 300/318

--- --- 17.7 25 18 75 18.7 25 19 76

6.0 7.2 26.7 30 26 82 27.7 30 27 83

11.5 13.8 35.0 40 33 89 36.0 40 35 90

14.0 16.8 38.7 40 37 92 39.7 45 38 93

23.0 27.7 52.4 60 49 130 53.4 60 51 131

25.5 30.7 56.1 60 53 136 57.1 60 54 137

--- --- 18.5 25 19 94 19.5 25 20 95

6.0 7.2 27.5 30 27 101 28.5 30 28 102

11.5 13.8 35.8 40 34 108 36.8 40 36 109

14.0 16.8 39.5 45 38 111 40.5 45 39 112

23.0 27.7 53.2 60 50 149 54.2 60 52 150

25.5 30.7 56.9 60 54 155 57.9 60 55 156

--- --- 18.5 25 19 94 19.5 25 20 95

6.0 7.2 27.5 30 27 101 28.5 30 28 102

11.5 13.8 35.8 40 34 108 36.8 40 36 109

14.0 16.8 39.5 45 38 111 40.5 45 39 112

23.0 27.7 53.2 60 50 149 54.2 60 52 150

25.5 30.7 56.9 60 54 155 57.9 60 55 156

FLA

MCA MOCP

NO P.E. w/ P.E. (pwrd fr/unit)

DISC. SIZE

MCA MOCP

FLA LRA FLA LRA

DISC. SIZE

50TCQA

NOTE: See page 44 for table legend and notes.

Legend and Notes for Table 10

LEGEND:

CO --- Convenient outlet DISC --- Disconnect FLA --- Full load amps IFM --- Indoor fan motor LRA --- Locked rotor amps MCA --- Minimum circuit amps MOCP --- Maximum over current protection P E --- P o w e r e x h a u s t UNPWR CO --- Unpowered convenient outlet NOTES:

1. In compliance with NEC requirements 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. Canadian units may be fuse or circuit breaker.

2. Unbalanced 3-Phase Supply Voltage Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine the percentage of voltage imbalance.

% Voltage Imbalance = 100 x

50TCQA

max voltage deviation from average voltage

average voltage

Example: Supply voltage is 230-3-60

AB = 224 v BC = 231 v AC = 226 v

Average Voltage =

Determine maximum deviation from average voltage. (AB) 227 – 224 = 3 v (BC) 231 – 227 = 4 v (AC) 227 – 226 = 1 v Maximum deviation is 4 v. Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

This amount of p hase imbalance is satisfactory as it is below the maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately.

(224 + 231 + 226)

= 227

= 1.76%

227

681

Economizer 2 Position Damper

Fig. 65 -- EconoMi$ert IV Wiring

Step 11 — Adjust Factory--Installed Options

Smoke Detectors —

Smoke detector(s) will be connected at the Central Terminal Board (CTB), at terminals marked “Smoke Shutdown”. Remove jumper JMP 3 when ready to energize unit.

Unit Without Economizer or 2 Position Damper

C08631

EconoMi$er IV Occupancy Switch —

Refer to Fig. 65 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 12 — Install Accessories

Available accessories include:

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) 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 Time Guard II compressor anti--cycle control Outdoor coil hail guard Outdoor coil protector grille Head pressure control Programmable setback thermostat Electrical/Mechanical thermostat and subbase Thermidistatt device Humidistat Electric Heaters Single Point kits Thermostat / Sensors CO

sensor

DDC interface (PremierLink) Louvered hail guard Phase monitor control

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 Manual for detailed Pre--Start and Start--up instructions.

50TCQA

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Catalog No: 50TCQ---01SI

Replaces: NEW

Carrier 50TCQA User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual