Carrier | 50TC | User manual | Carrier 50TC Instruction manual

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

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