Carrier 62X Series Installation manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53620026-01 Printed in U.S.A. Form 62X-2T Pg 1 1-22 Replaces: 62X-1T
Controls, Operation, and Start-Up
CONTENTS
Page
CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 3
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Airflow Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . 4
• EVAPORATOR
• CONDENSER
• REHEAT SYSTEM
Heating System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
• GAS HEAT
• ELECTRIC HEAT
• HOT WATER HEAT
Filtration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Energy Recovery Ventilator . . . . . . . . . . . . . . . . . . . . 8
Exhaust Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Supply Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Control Configuration . . . . . . . . . . . . . . . . . . . . . . . . . 8
Controller Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
• UNIVERSAL INPUTS
Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
• LOCAL RNET ACCESS PORT
EQUIPMENT TOUCH™DEVICE . . . . . . . . . . . . . . . . 13
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Device Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Equipment Touch Usage . . . . . . . . . . . . . . . . . . . . . . 14
Access Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
CONTROL NAVIGATION . . . . . . . . . . . . . . . . . . . . . . 15
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Standby Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Home Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Status Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Damper Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Set Points Screens. . . . . . . . . . . . . . . . . . . . . . . . . . . 18
• SET POINTS SCREENS OVERVIEW
Fan Set Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
ECW Set Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Cooling 1 Set Points . . . . . . . . . . . . . . . . . . . . . . . . . 19
• COOLING 1 ENABLE:
• COOLING 1 MOD:
• COOLING:
Cooling 2 Set Points . . . . . . . . . . . . . . . . . . . . . . . . . 20
• COOLING 2 ENABLE:
Dehumidification Set Points . . . . . . . . . . . . . . . . . . . 20
• DEHUM ENABLE:
• DEHUM:
• DEADBAND:
Heating Set Points . . . . . . . . . . . . . . . . . . . . . . . . . . .20
• HEATING 1 ENABLE:
• HEATING:
• DEADBAND:
Heat Pump Heating Set Points
(62W and 62H Only) . . . . . . . . . . . . . . . . . . . . . . . .21
• HEAT PUMP 1 AND 2 ENABLE:
• HEATING:
• DEADBAND:
Limits/Safety Set Points. . . . . . . . . . . . . . . . . . . . . . .21
• CLG MODE LO LIMIT:
• DH MODE LO LIMIT:
• HTG MODE HI LIMIT:
• COMP 1 DISABLE/COMP 2 DISABLE:
• UPPER FREEZE:
• MIDDLE FREEZE:
• LOWER FREEZE:
• ECW DEFROST:
Unoccupied Setpoints (Units with Night Setback ETO
only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
• COOLING:
• DEHUMIDIFY:
• HEATING:
Tech Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Unit Control Configuration. . . . . . . . . . . . . . . . . . . . .22
• ZONE SENSOR OPTION
• PUSH-BUTTON OVERRIDE
• ZONE SETPOINT ADJUST TECH SETUP
• SETPOINT ADJUST LIMIT (+/-)
• NIGHT SET BACK (NSB) OPTION
• MISC OPTIONS A
• MISC OPTIONS B
Tech Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
• OCCUPANCY CONTROL
• MANUAL OCC CONTROL
• ENABLE UNIT OPERATION
• EMERGENCY SHUTDOWN
• EMERGENCY HEAT ENABLE (62H AND 62W HEAT
PUMPS ONLY)
• SF MINIMUM SETTING
• SF HP MINIMUM SETTING
• ZAT/SAT RESET
• HWV MINIMUM OUTPUT
• SUPPLY FAN OCCCUPIED/UNOCCUPIED
OPERATION
• SCHEDULES
• VIEWING LOCAL SCHEDULES
• ADDING NEW LOCAL SCHEDULES
• ADDING MULTIPLE PERIODS TO A SCHEDULE
Sensor Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . .25
• SUPPLY AIR TEMPERATURE (SAT) RESET
• SAT RESET OPERATION
Manual Override . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Differential Pressure Transmitter Summary. . . . . . .26
Airflow Monitor Station (AMS) Summary . . . . . . . . .26
62X 03-55 Tons
Revision H Controls
Dedicated Outdoor Air Unit

2
Supply Fan and Exhaust Fan AMS Settings . . . . . . 26
Miscellaneous Settings . . . . . . . . . . . . . . . . . . . . . . . 26
Building Automation System (BAS) Module Setup. 26
Set Time and Date . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
• MAX MASTERS
• MAX INFO FRAMES
Network Router. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
IP Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Time Master. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Module Status (Modstat) . . . . . . . . . . . . . . . . . . . . . . 28
PID Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Equipment Touch Setup . . . . . . . . . . . . . . . . . . . . . . 28
Equipment Configuration . . . . . . . . . . . . . . . . . . . . . 28
• SF OPTION
• EF OPTION
• HGRH OPTION
• DEHUM OPTIONS
• HEATING OPTIONS
• COOLING ENABLED BY
• HEATING ENABLED BY
• TEMP OPTIONS #1
• TEMP OPTIONS #2
• HUMIDITY OPTIONS #1
• AIR PRESSURE OPTIONS
Archive Program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
• RESTORING FROM ARCHIVE
Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
• SUPPLY FAN TEST MODE
• EXHAUST FAN TEST MODE
• COOLING TEST MODE
• DEHUMIDIFICATION TEST MODE
• HEATING TEST MODE
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Occupied Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
• OUTDOOR AIR DAMPER (OD)
• SUPPLY FAN (SF)
• EXHAUST FAN (EF)
• ZAT/SAT SET POINT RESET
• ENERGY CONSERVATION WHEEL (ECW)
• COOLING MODE
• DEHUMIDIFICATION MODE (FIELD ENABLED)
• HEATING MODE
• UNOCCUPIED MODE
• SAFETY SWITCHES
ALARMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Alarm Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
• CLEARING ALARMS
Alarm Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
• AUTOMATIC RESET
• MANUAL RESET
• ALARMS AFTER STARTUP
• SAFETY SWITCHES
• SAFETY SHUTDOWN
SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Zone Air Temperature Sensor (Carrier ZS2) . . . . . . 42
• INSTALLATION
Multiple ZS Sensors-Wiring and Setup . . . . . . . . . . 43
Supply Air Temperature and Relative Humidity
Sensor (SAT/RH) . . . . . . . . . . . . . . . . . . . . . . . . . . 44
SAT/RH SENSOR INSTALLATION. . . . . . . . . . . . . . . 44
• SENSOR MOUNTING
• SENSOR WIRING AND CONFIGURATION
• CONTROLLER WIRING AND CONFIGURATION
Differential Pressure Transmitter (DPT) . . . . . . . . . 47
• INSTALLATION
Clogged Filter Indicator . . . . . . . . . . . . . . . . . . . . . . 47
• SETUP
• RESET
Phase Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Energy Management Relay . . . . . . . . . . . . . . . . . . . 48
Energy Recovery Wheel VFD Control . . . . . . . . . . . 48
Hot Water Heating Control . . . . . . . . . . . . . . . . . . . . 50
Digital Scroll Compressor . . . . . . . . . . . . . . . . . . . . 50
Inverter Driven Compressor. . . . . . . . . . . . . . . . . . . 51
Condenser Fan Motors and
Head Pressure Control. . . . . . . . . . . . . . . . . . . . . 51
HEATING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Set Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Ignition Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Flame Current Sensor. . . . . . . . . . . . . . . . . . . . . . . . 52
• SERVICE CHECKS
Staged Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
• CALL FOR HEAT
• IGNITION AND OPERATIONAL FAILURES DURING A
CALL FOR HEAT RESULT IN “LOCKOUT” OF THE
IGNITION CONTROL
• RECOVERY FROM LOCKOUT
• IC FAULT CONDITIONS AND LED KEY
Draft Fan Pressure Measurement HM Series Heat
Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Manifold Pressures . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Modulating Gas Heat . . . . . . . . . . . . . . . . . . . . . . . . 58
• MODULATING GAS VALVE
• SIGNAL CONDITIONER (SC30)
• INDUCER FAN SPEED CONTROL
• TIMER RELAY CONTROL (TR1)
• SEQUENCE OF OPERATION FOR ELECTRONIC
MODULATION WITH INDUCER SPEED CONTROL
• CALL FOR HEAT
• IGNITION AND OPERATIONAL FAILURES DURING A
CALL FOR HEAT RESULT IN “LOCKOUT” OF THE
IGNITION CONTROL
• RECOVERY FROM LOCKOUT
• FAULT CONDITIONS AND LED KEY
Electric Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
SCR Controlled Electric Heat. . . . . . . . . . . . . . . . . . 63
ENERGY RECOVERY VENTILATOR CONTROL . . . 65
VFD Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
ERV Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
• BEARINGS
• ERV MOTOR
• BELT
• VFD
• BYPASS
• FILTERS
• SEALS
• WHEEL
ELECTRICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . 67
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
62X Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Setting up AUTOBAUD . . . . . . . . . . . . . . . . . . . . . . . 82
• TO SET A CUSTOM IP ADDRESS
APPENDIX A —BAS COMMISSIONING . . . . . . . . . 82
APPENDIX B —OPERATING MODES AND
CONDITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
APPENDIX C —EQUIPMENT QUICK START-UP
GUIDANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

3
APPENDIX D —CONTROL NAVIGATION
DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
APPENDIX E —AIR BALANCE
INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . CL-1
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified service personnel should install, repair, or
service air-conditioning equipment. Untrained personnel can per-
form the basic maintenance functions of replacing filters. Trained
service personnel should perform all other operations.
When working on air-conditioning equipment, observe precau-
tions in the literature, tags and labels attached to the unit, and
other safety precautions that may apply. Follow all safety codes.
Wear safety glasses and work gloves. Use quenching cloth for
unbrazing operations. Have fire extinguishers available for all
brazing operations.
GENERAL
This book contains the Controls, Operation and Start-Up informa-
tion for the Carrier 62X dedicated outdoor air units with Design
Series 5 (Revision H) controls. Use this guide in conjunction with
the Installation, Start-Up, and Maintenance instructions that are
packaged with the unit. Refer to the unit wiring diagrams, located
inside the unit control cabinet, for detailed wiring information. See
Fig. 1 and Table 1-3 for unit model number nomenclature.
An accessory Equipment Touch device (Equipment Touch™ or
Equipment Touch App and Field Assistant) is required to config-
ure, modify, and diagnose many of the unit control functions. At
least one Equipment Touch device is recommended per job site.
The 62X is a packaged heating, ventilation, and air conditioning
(HVAC) unit that specializes in conditioning and supplying 100%
outdoor air, also known as dedicated outdoor air system (DOAS).
The 62X unit is a packaged, air cooled unit with direct expansion
(DX) cooling and optional heating.
The 62X is typically utilized as part of make-up air or ventilation
systems to provide “neutral air” or air that is supplied near the
space drybulb temperature, but with relative humidity below 60%.
This allows the DOAS unit to handle the latent load of the outdoor
air and potentially the space, while leaving remaining space sensi-
ble load for ancillary cooling/heating devices. In certain configu-
rations, the DOAS unit may be set up to offset some space sensi-
ble loads, allowing it to act as a stage of cooling, but not complete-
ly replacing an ancillary device. See the DOAS Application Guide
in the 62X product data for further application guidance.
Airflow Process
Outdoor air enters 62X units through the outdoor air intake hood.
The outdoor air passes through a filtration device and is condi-
tioned using direct expansion (DX) cooling (with optional liquid
subcooling and/or hot gas reheat) or optional heating (electric, gas,
WARNING
Before performing service or maintenance operation on unit
turn off and lock off main power switch to unit. Electrical
shock can cause personal injury and death. Shut off all power
to this equipment during installation and service. The unit may
have an internal non-fused disconnect or a field-installed dis-
connect. Note that the unit may also be equipped with a
convenience outlet, if the outlet is wired to the line side of
the unit-mounted disconnect (if equipped), or directly to
the units incoming power, it will remain hot when the dis-
connect in the unit is off. There is a separate fuse/discon-
nect for the convenience outlet.
CAUTION
This unit uses a microprocessor-based electronic control sys-
tem. Do not use jumpers or other tools to short out components
or to bypass or otherwise depart from recommended proce-
dures. Any short-to-ground of the control board or accompany-
ing wiring may destroy the electronic modules or electrical
components.
WARNING
1. Improper installation, adjustment, alteration, service, or
maintenance can cause property damage, personal inju-
ry, or loss of life. Refer to the User’s Information Manu-
al provided with this unit for more details.
2. Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
What to do if you smell gas:
1. DO NOT try to light any appliance.
2. DO NOT touch any electrical switch, or use any phone
in your building.
3. IMMEDIATELY call your gas supplier from a neigh-
bor’s phone. Follow the gas supplier’s instructions.
If you cannot reach your gas supplier call the fire
department.
WARNING
DO NOT USE TORCH to remove any component. System
contains oil and refrigerant under pressure.
To remove a component, wear protective gloves and goggles
and proceed as follows:
a. Shut off electrical power to unit.
b. Recover refrigerant to relieve all pressure from system
using both high-pressure and low pressure ports.
c. Traces of vapor should be displaced with nitrogen and
the work area should be well ventilated. Refrigerant in
contact with an open flame produces toxic gases.
d. Cut component connection tubing with tubing cutter and
remove component from unit. Use a pan to catch any oil
that may come out of the lines and as a gage for how
much oil to add to the system.
e. Carefully unsweat remaining tubing stubs when neces-
sary. Oil can ignite when exposed to torch flame.
Failure to follow these procedures may result in personal
injury or death.
CAUTION
DO NOT re-use compressor oil or any oil that has been ex-
posed to the atmosphere. Dispose of oil per local codes and
regulations. DO NOT leave refrigerant system open to air any
longer than the actual time required to service the equipment.
Seal circuits being serviced and charge with dry nitrogen to
prevent oil contamination when timely repairs cannot be com-
pleted. Failure to follow these procedures may result in dam-
age to equipment.

4
or steam/hot water). The conditioned outdoor air is discharged
from the supply fan through a vertical or horizontal supply open-
ing. There is no return air opening on 62X Series units with supply
only configurations.
For 62X units without the energy recovery system, the outdoor air
passes through a filtration device and is conditioned using either
direct expansion (DX) cooling (with optional liquid subcooling
and/or hot gas reheat) or optional heating (electric, gas, or steam/
hot water). The conditioned outdoor air is discharged from the
supply fan through a vertical or horizontal supply opening. Air can
be returned to the unit through an optional vertical return air open-
ing and can be exhausted from the unit by an optional exhaust fan.
There is no recirculation of return air to the space.
For 62X units with the energy recovery ventilator, the outdoor air
passes through a filtration device and enters the energy recovery
device. The outdoor air is preconditioned by the energy recovery
device by transferring energy to or from the return air. The outdoor
air is then conditioned using direct expansion (DX) cooling (with
optional liquid subcooling and/or hot gas reheat) or optional heat-
ing (electric, gas, or steam/hot water). The conditioned outdoor air
is discharged from the supply fan through a vertical or horizontal
supply opening. Air is returned to the unit through a vertical return
air opening and passes through a filtration device (if equipped).
The return air passes through the energy recovery wheel, where
heat is transferred to or from the supply air, and is exhausted from
the unit. There is no recirculation of return air to the space.
Refrigeration System
All Carrier dedicated outdoor air units utilize highly efficient
scroll compressors that have been optimally designed for use with
Puron® refrigerant (R-410A). All 62X units will have a variable
capacity compressor on the lead circuit, either digital (3-18 tons)
or inverter driven (20+ tons). Digital compressors shall be capable
of modulating from 20-100% of nominal compressor capacity. In-
verter driven compressors shall be capable of modulating from 58-
100% of nominal compressor capacity. All circuits with inverter
compressors shall be equipped with minimum load control valve.
Digital scroll type compressors utilize an external control board to
provide compressor safeties and control compressor modulation.
An onboard solenoid is used to unload the compressor. When the
solenoid is closed, the compressor is loaded. When the solenoid is
open, the compressor is unloaded.
A TXV (thermostatic expansion valve) metering device is used on
all systems.
The refrigeration system includes a hot gas bypass valve with all
standard scroll compressors and with inverter driven compressors.
EVAPORATOR
The 62X Series units utilize a 6-row aluminum/copper evaporator
coil, with 12 fins per inch. Evaporator coils are available with op-
tional harsh environment coating.
CONDENSER
The 62X Series units utilize a microchannel condenser coil, with
12 fins per inch. Condenser coils are available with optional harsh
environment coating. Condenser fans will be variable speed and
will utilize a variable frequency drive (VFD) to modulate speed
based on head pressure.
REHEAT SYSTEM
The 62X Series units are standard with modulating hot gas reheat
(HGRH) with an optional liquid subcooling. The HGRH system
consists of a full faced coil that is fed hot refrigerant gas by lead
circuit or by all circuits. The HGRH is a modulating type control.
The liquid subcooling and HGRH system features two full faced
coils. The first coil is used for liquid subcooling, and is fed warm
liquid gas by all available circuits. The liquid subcooling coil
uses cycling (on/off) type control. The second coil is used for
HGRH, and is fed hot refrigerant gas by the lead circuit. The
HGRH is a modulating type control. Liquid subcooling or
HGRH coils are available with optional harsh environment
coating.
Heating System
The 62X Series units are available with optional electric, gas, hot
water, or steam heating (special order).
GAS HEAT
The optional gas heating system consists of a factory-installed nat-
ural gas or liquefied petroleum (LP) heat insert with tubular, stain-
less steel heat exchangers and in-shot burners. All heaters are 80%
efficient (at sea level) and are available in multiple input ratings,
ranging from 75 to 1200 MBtuh. The heater can utilize either a 2-
stage, 4-stage, or modulating gas control valve. Modulating valves
can be 5:1 (20 to 100%) or 10:1 (10 to 100%) turndown. Heat ex-
changers are available with optional harsh environment coating.
The gas heater is natural gas or can have LP factory-installed.
ELECTRIC HEAT
The optional electric heating system consists of a factory-installed
electric heat insert with low watt density coiled heating elements
and stainless steel terminals. The electric heater is available in
multiple output ratings, ranging from 5 to 120 kW (at 230/460V).
The heater control is accomplished by staging (1, 2, or 4 stages) or
by modulation silicon controlled rectifier (SCR).
HOT WATER HEAT
The optional hot water heating system consists of a factory-
installed, four-row hot water coil. The hot water control valve
must be field provided and installed. The hot water coil is avail-
able with optional harsh environmental coating.

5
Fig. 1 — 62X Model Number Information
A – 100% OA / Cabinet A / Vertical Supply / No Exhaust
B – 100% OA / Cabinet B / Vertical Supply / No Exhaust
C – 100% OA / Cabinet C / Vertical Supply / No Exhaust
D – 100% OA / Cabinet D / Vertical Supply / No Exhaust
E – 100% OA / Cabinet A / Horizontal Supply / No Exhaust
F – 100% OA / Cabinet B / Horizontal Supply / No Exhaust
G – 100% OA / Cabinet C / Horizontal Supply / No Exhaust
H – 100% OA / Cabinet D / Horizontal Supply / No Exhaust
J – 100% OA / Cabinet A / Vertical Supply / Vertical Exhaust
K – 100% OA / Cabinet B / Vertical Supply / Vertical Exhaust
M – 100% OA / Cabinet C / Vertical Supply / Vertical Exhaust
N – 100% OA / Cabinet D / Vertical Supply / Vertical Exhaust
P – 100% OA / Cabinet A / Horizontal Supply / Vertical Exhaust
Q – 100% OA / Cabinet B / Horizontal Supply / Vertical Exhaust
R – 100% OA / Cabinet C / Horizontal Supply / Vertical Exhaust
S – 100% OA / Cabinet D / Horizontal Supply / Vertical Exhaust
U – 100% OA / Cabinet CXL / Vertical Supply / No Exhaust
V – 100% OA / Cabinet DXL / Vertical Supply / No Exhaust
X – 100% OA / Cabinet CXL / Horizontal Supply / No Exhaust
Y – 100% OA / Cabinet DXL / Horizontal Supply / No Exhaust
2 – 100% OA / Cabinet CXL / Vertical Supply / Vertical Exhaust
3 – 100% OA / Cabinet DXL / Vertical Supply / Vertical Exhaust
5 – 100% OA / Cabinet CXL / Horizontal Supply / Vertical Exhaust
6 – 100% OA / Cabinet DXL / Horizontal Supply / Vertical Exhaust
7– 100% OA / Cabinet CL / Vertical Supply / No Exhaust
8– 100% OA / Cabinet CL / Horizontal Supply / No Exhaust
L– 100% OA / Cabinet CL / Vertical Supply / Vertical Exhaust
9– 100% OA / Cabinet CL / Horizontal Supply / Vertical Exhaust
62X – Dedicated Outdoor Air Unit
Cabinet, Supply, Discharge
Unit Size – Nominal Capacity (MBH)
– – None
B – 324 32 4 Yes
C – 364 36 4 Yes
D – 424 42 4 Yes
E – 484 48 4 Yes
F – 486 48 6 Yes
G – 544 54 4 Yes
H – 604 60 4 Yes
J – 606 60 6 Yes
K – 664 66 4 Yes
M – 666 66 6 Yes
P – 324 32 4 No
Q – 364 36 4 No
R – 424 42 4 No
S – 484 48 4 No
T – 486 48 6 No
U – 544 54 4 No
V – 604 60 4 No
W – 606 60 6 No
X – 664 66 4 No
Y – 666 66 6 No
Energy Recovery Ventilator (ERV) Wheel
03 – 36
04 – 48
05 – 60
06 – 72
07 – 84
08 – 96
10 – 120
12 – 150
15 – 180
18 – 210
20 – 240
25 – 300
30 – 360
35 – 420
Coil and Reheat Options
J – 6 Mod Lead — Var Speed
K – 6 Mod Dual — Var Speed
M – 6 Mod Lead SubCooling Var Speed
Supply Fan Motor Options
A – 1 HP ODP with VFD
B – 1 1/2 HP ODP with VFD
C – 2 HP ODP with VFD
D – 3 HP ODP with VFD
E – 5 HP ODP with VFD
F – 7 1/2 HP ODP with VFD
G – 10 HP ODP with VFD
H – 15 HP ODP with VFD
J – 1 HP TEFC with VFD
K – 1 1/2 HP TEFC with VFD
M – 2 HP TEFC with VFD
N– 3 HP TEFC with VFD
P– 5 HP TEFC with VFD
Q– 7 1/2 HP TEFC with VFD
R– 10 HP TEFC with VFD
S– 15 HP TEFC with VFD
T–
ECM*
U – Dual ECM *
SEE NEXT PAGE
FOR REMAINDER
OF MODEL NUMBER
NOMENCLATURE
BHC07 - E62X
Wheel # Diameter Thickness Bypass
Heat Options
– – None
A – 75 Standard N/A
B – 100 Standard N/A
C – 150 Standard N/A
D – 200 Standard N/A
E – 250 Standard N/A
F – 300 Standard N/A
G – 350 Standard N/A
H – 400 Standard N/A
I – 200 High (XL) N/A
J – 300 High (XL) N/A
K – 400 High (XL) N/A
L – 500 High (XL) N/A
M – 600 High (XL) N/A
N – 700 High (XL) N/A
O – 800 High (XL) N/A
P – 1000 High (XL) N/A
Q – 1200 High (XL) N/A
S – N/A N/A 5
T – N/A N/A 10
U – N/A N/A 15
V – N/A N/A 20
W – N/A N/A 25
X – N/A N/A 30
Y – N/A N/A 35
Z – N/A N/A 40
1 – N/A N/A 50
2 – N/A N/A 60
3 – N/A N/A 70
4 – N/A N/A 80
5 – N/A N/A 100
6 – N/A N/A 110
7 – N/A N/A 120
8 – Hot Water Coil
MBtuh input Temperature Rise† E-Heat kW
Evaporator HGRH HGRH Sub-Cooling Condenser
Coil Rows Circuit Fans
EHKBRAR E
40 – 480
45 – 540
50 – 600
55 – 660
* ECM supply and exhaust fan motors are not available in 575 V. See physical data tables for ECM motor availability per cabinet size.
† Standard Temperature rise is 80/100°F for horizontal/vertical supply. High Temperature rise is 130/160°F for horizontal/vertical supply and
requires an XL cabinet.
NOTE: Please see latest version of Carrier's Dedicated Outdoor Air Systems Builder program for any size and option restrictions.

6
Fig. 1 — 62X Model Number Information (cont)
a62-767
Supply Fan
2 – 350 mm, BI
3– 450 mm Low, BI
4 – 450 mm High, BI
5 – 500 mm Low, BI
6 – 500 mm High, BI
7 – 560 mm, BI
D – 10 in., BI
E – 11 in., BI
F – 12 in., BI
G – 14 in., BI
H – 16 in., BI
J – 18 in., BI
K – 20 in., BI
M – 22 in., BI
N – 25 in., BI
Power Exhaust Fan Motor Options
- – None
A – 1 HP ODP with VFD
B – 1 1/2 HP ODP with VFD
C – 2 HP ODP with VFD
D – 3 HP ODP with VFD
E – 5 HP ODP with VFD
F – 7 1/2 HP ODP with VFD
G – 10 HP ODP with VFD
H – 15 HP ODP with VFD
J – 1 HP TEFC with VFD
K – 1 1/2 HP TEFC with VFD
M – 2 HP TEFC with VFD
N – 3 HP TEFC with VFD
P – 5 HP TEFC with VFD
Q – 7 1/2 HP TEFC with VFD
R – 10 HP TEFC with VFD
S – 15 HP TEFC with VFD
T – ECM*
U – Dual ECM*
SEE PREVIOUS PAGE
FOR REMAINDER
OF MODEL NUMBER
NOMENCLATURE
H – Revision H Controls
A– 208-3-60 VCC Lead Circuit Standard Efficiency
C– 208-3-60 VCC Lead Circuit High Efficiency
E– 230-3-60 VCC Lead Circuit Standard Efficiency
G– 230-3-60 VCC Lead Circuit High Efficiency
J– 460-3-60 VCC Lead Circuit Standard Efficiency
M– 460-3-60 VCC Lead Circuit High Efficiency
P– 575-3-60 VCC Lead Circuit Standard Efficiency
R– 575-3-60 VCC Lead Circuit High Efficiency
Design Series
– – None 2 in. MERV 8
A – None 4 in. MERV 8
B – None 4 in. MERV 11
C – None 4 in. MERV 13
D – Smoke detector 2 in. MERV 8
E – Smoke detector 4 in. MERV 8
F – Smoke detector 4 in. MERV 11
G – Smoke detector 4 in. MERV 13
Control Filter MERV
Option Thickness
Control Options and Filters
BHC07 - E62X EHKBRAR E
Voltage Options, Compressor and Condenser Fans
Voltage Compressor Condenser Efficiency
P – 12 in., AF
Q – 14 in., AF
R – 16 in., AF
S – 18 in., AF
T – 20 in., AF
U – 22 in., AF
V – 25 in., AF
Exhaust Fan
- – None
2 – 350 mm, BI
3– 450 mm Low, BI
4 – 450 mm High, BI
5
– 500 mm Low, BI
6
– 500 mm High, BI
7
– 560 mm, BI
D – 10 in., BI
E – 11 in., BI
F – 12 in., BI
G – 14 in., BI
H – 16 in., BI
J – 18 in., BI
K – 20 in., BI
M – 22 in., BI
N – 25 in., BI
P – 12 in., AF
Q – 14 in., AF
R – 16 in., AF
S – 18 in., AF
T – 20 in., AF
U – 22 in., AF
V – 25 in., AF
a62-768
Factory Installed Options
Refer to tables on page 6 for
available option codes
LEGEND
AF — Airfoil
BI — Backward Inclined
ECM — Electronically Commutated Motor
N/A — Not Applicable
ODP — Open Drip Proof
TEFC — Totally Enclosed Fan Cooled
VCC — Variable Capacity Compressor
VFD — Variable Frequency Drive
*ECM supply and exhaust fan motors are not avail-
able in 575 V. See physical data tables for ECM
motor availability per cabinet size.
NOTE:
Please see the latest version of Carrier’s Dedicated
Outdoor Air Systems Builder program for any size
and option restrictions.

7
Table 1 — FIOP Table Table 2 — Limitations
Table 3 — Digits 17 and 18
Option Description
1Air flow monitor control (supply only or supply and exhaust)
2Spring type vibration isolation on Supply fan & Exhaust Fan (if
exhaust fan selected)
3Non-fused disconnect
4Pressure control (supply duct pressure, exhaust space
pressure)
5115V GFI Convenience outlet w/15A breaker - Unit-Powered
Type
65:1 turndown modulating gas heat or SCR controlled electric
heat
710:1 turndown modulating gas heat
8ECW VFD Defrost
9Harsh environment coating- cabinet, evap coil, cond coil,
reheat coil, sub-cooling coil (if installed)
Option
1Not available with duct pressure control
2Spring vibration isolation not available on ECM
3
4No available with airflow monitor
5
65:1 not available on BXL or CXL. SCR not available on 5kW
710:1 Modulating not available on 75MBH
8
9Not available with ODP motor
17 & 18 FIOPs 17 & 18 FIOPs 17 & 18 FIOPs 17 & 18 FIOPs 17 & 18 FIOPs
AA 1 CH 4,7 EP 2,8,9 HM 1,2,5,9 KW 3,4,5,8,9
AB 1,2 CI 5,7 EQ 2,9 HN 3,5,9 KY 2,3,4,5,8,9
AC 2 CJ 7 ER 3,4,5,6,8,9 HO 1,3,5,9 LL 1,2,6
AD 1,2,3 CN 1,5,6,8 ES 3,5,6,8,9 HP 2,3,5,9 LM 1,3,6
AE 2,3 CO 1,6,8 ET 3,6,8,9 HQ 1,2,3,5,9 LN 2,3,6
AF 1,3 CP 1,8 EU 3,8,9 HR 4,5,9 LO 1,2,3,6
AG 3 CQ 2,3,4,5,6,8 EV 3,9 HT 2,4,5,9 LQ 2,4,6
AH 1,3,5 CR 2,4,5,6,8 EW 4,5,6,8,9 HV 3,4,5,9 LS 3,4,6
AJ 2,3,4 CS 2,5,6,8 EX 4,6,8,9 HX 2,3,4,5,9 LU 2,3,4,6
AL 2,4 CT 2,6,8 EY 4,8,9 HZ 1,2,8 LW 5,6
AM 3,4 CU 2,8 EZ 4,9 II 1,3,8 LX 1,2,5,6
AN 4 CV 3,4,5,6,8 FF 5,6,8,9 IJ 2,3,8 LY 1,3,5,6
AS 1,5 CW 3,5,6,8 FG 5,8,9 IK 1,2,3,8 LZ 2,3,5,6
AT 2,3,4,5 CX 3,6,8 FH 5,9 IM 2,4,8 MM 1,2,3,5,6
AU 2,3,5 CY 3,8 FI 6,8,9 IO 3,4,8 MW 1,6,9
AV 2,4,5 CZ 4,5,6,8 FJ 6,9 IQ 2,3,4,8 MX 2,6,9
AW 2,5 DD 4,6,8 FK 8,9 IS 1,5,8 MY 1,2,6,9
AX 3,4,5 DE 4,8 FL 9 IT 2,5,8 MZ 3,6,9
AZ 3,5 DF 5,6,8 FP 1,5,7,8,9 IU 1,2,5,8 NN 1,3,6,9
BB 4,5 DG 5,8 FQ 1,7,8,9 IV 3,5,8 NO 2,3,6,9
BC 5 DH 6,8 FS 2,3,4,5,7,8,9 IW 1,3,5,8 NP 1,2,3,6,9
BG 1,5,6 DI 8 FT 2,4,5,7,8,9 IX 2,3,5,8 NQ 4,6,9
BH 1,6 DM 1,5,7,8 FU 2,5,7,8,9 IY 1,2,3,5,8 NS 2,4,6,9
BI 2,3,4,5,6 DN 1,7,8 FV 2,7,8,9 IZ 4,5,8 NU 3,4,6,9
BJ 2,4,5,6 DO 2,3,4,5,7,8 FX 3,4,5,7,8,9 JK 2,4,5,8 NW 2,3,4,6,9
BK 2,5,6 DP 2,4,5,7,8 FY 3,5,7,8,9 JM 3,4,5,8 NY 5,6,9
BL 2,6 DQ 2,5,7,8 FZ 3,7,8,9 JO 2,3,4,5,8 NZ 1,5,6,9
BM 3,4,5,6 DR 2,7,8 GH 4,5,7,8,9 JQ 1,2,8,9 OO 2,5,6,9
BN 3,5,6 DS 3,4,5,7,8 GI 4,7,8,9 JR 1,3,8,9 OP 1,2,5,6,9
BO 3,6 DT 3,5,7,8 GK 5,7,8,9 JS 2,3,8,9 OQ 3,5,6,9
BP 4,5,6 DU 3,7,8 GM 7,8,9 JT 1,2,3,8,9 OR 1,3,5,6,9
BQ 4,6 DV 4,5,7,8 GN 7,9 JV 2,4,8,9 OS 2,3,5,6,9
BR 6 DX 4,7,8 GP 1,2,5 JX 3,4,8,9 OT 1,2,3,5,6,9
BV 1,5,7 DY 5,7,8 GQ 1,2,3,5 JZ 2,3,4,8,9 OU 4,5,6,9
BW 1,7 DZ 7,8 GS 1,2,9 KL 1,5,8,9 OW 2,4,5,6,9
BX 2,3,4,5,7 EH 1,5,6,8,9 GT 1,3,9 KM 2,5,8,9 OY 3,4,5,6,9
BY 2,4,5,7 EI 1,6,8,9 GU 2,3,9 KN 1,2,5,8,9 PP 2,3,4,5,6,9
BZ 2,5,7 EJ 1,8,9 GV 1,2,3,9 KO 3,5,8,9 PR 1,2,6,8
CC 2,7 EK 1,9 GX 2,4,9 KP 1,3,5,8,9 PS 1,3,6,8
CD 3,4,5,7 EL 2,3,4,5,6,8,9 GZ 3,4,9 KQ 2,3,5,8,9 PT 2,3,6,8
CE 3,5,7 EM 2,4,5,6,8,9 HI 2,3,4,9 KR 1,2,3,5,8,9 PU 1,2,3,6,8
CF 3,7 EN 2,5,6,8,9 HK 1,5,9 KS 4,5,8,9 PW 2,4,6,8
CG 4,5,7 EO 2,6,8,9 HL 2,5,9 KU 2,4,5,8,9 PY 3,4,6,8

8
Table 3 — Digits 17 and 18 (cont)
Filtration System
The 62X Series units are equipped with either a 2-in. (MERV 8
pleated) filter or a 4-in. (MERV 8, 11 or 14 pleated) filter (located
before the DX coil). A metal mesh screen is used on the outdoor
air intake to prevent larger debris from entering the unit. For units
equipped with the optional energy recovery ventilator (ERV), 2-in.
MERV 8 pleated filters are located on the outdoor air and return
air entrances of the wheel.
Energy Recovery Ventilator
The 62X units are available with an optional belt driven, rotary en-
ergy recovery ventilator (ERV). The ERV can have multiple diam-
eters and thicknesses. The ERVs are available with optional VFD
defrost and optional wheel bypass.
Exhaust Fan
The 62X units with a return exhaust configuration are available
with an optional factory-installed direct drive exhaust fan. Exhaust
fans can be airfoil (AF) or backward inclined (BI) type and are
available in multiple fan sizes. Exhaust fans are available with op-
tional harsh environment coating. Fan motors range from 1/2 to
15 hp and are available in open drip proof (ODP), totally enclosed
fan cooled (TEFC), or electronically commutated motors (ECM).
TEFC and ODP motors have a factory-installed VFD as standard.
Supply Fan
All 62X units include a factory-installed direct drive supply fan.
Supply fans can be airfoil (AF) or backward incline (BI) type and
are available in multiple fan sizes. Supply fans are available with
optional harsh environment coating. Fan motors range from 1/2 to
15 hp and are available in open drip proof (ODP), totally enclosed
fan cooled (TEFC) or electronically commutated motors (ECM).
TEFC and ODP motors have a factory-installed VFD as standard.
CONTROLS
Carrier 62X Series units are equipped with an OEMCtrl1 Opti-
CORE2 LS-1628u microprocessor-based controller that provides
equipment control based on operating conditions and user config-
uration. The OptiCORE LS-1628u controller can directly control
individual components (ex. supply fan, compressors, air damper,
HGRH) or can enable optional components for individual control
(condenser fans, ERV, etc.). Controller configuration, set point ad-
justment, status monitoring, and troubleshooting are achieved us-
ing an accessory Equipment Touch 2™ display. At least one
Equipment Touch 2 display is recommended per jobsite. See Fig.
2 for typical Equipment Touch wiring connection to unit control-
ler.
NOTE: Equipment Touch requires external 24VDC power. Do not
power the Equipment Touch from the Rnet Port.
Some of the features of the LS-1628 controller include:
• Easy access to set points, schedules, status, and unit con-
figuration via local or remote interface
• Built-in password protection to prevent unauthorized ac-
cess
• Built in timer for compressor protection
• Factory configured control program archive
• Service test and diagnostic mode
• Controller mounted on/off switch for easy power cycling
• Fully integrated webpage for easy communication port
configuration via SERVICE PORT connection
• Integrated LEDs (light-emitting diodes) to display control-
ler and I/O operation
• eMMC Flash memory back-up to maintain time and date
in event of a power outage
NOTE: The OptiCORE controller has a 32-bit ARM Cortex-A8,
600MHz, processor with multi-level cache memory / 16 GBs
eMMC Flash memory and 256 MB DDR3 DRAM.
Control Configuration
The OptiCORE controller is preprogrammed and prewired from
the factory to reflect the factory configuration and factory installed
options for each unit. Any field modifications of the unit must be
updated in the unit control configuration.
17 & 18 FIOPs 17 & 18 FIOPs 17 & 18 FIOPs 17 & 18 FIOPs
QQ 2,3,4,6,8 SZ 1,2,3,7 YA 2,3,4,7,9 YZ 3,4,7,8
QS 1,2,5,6,8 TU 2,4,7 YC 5,7,9 ZB 2,3,4,7,8
QT 1,3,5,6,8 TW 3,4,7 YD 1,5,7,9 ZD 1,2,5,7,8
QU 2,3,5,6,8 TY 2,3,4,7 YE 2,5,7,9 ZE 1,3,5,7,8
QV 1,2,3,5,6,8 UU 1,2,5,7 YF 1,2,5,7,9 ZF 2,3,5,7,8
QX 1,2,6,8,9 UV 1,3,5,7 YG 3,5,7,9 ZG 1,2,3,5,7,8
QY 1,3,6,8,9 UW 2,3,5,7 YH 1,3,5,7,9 ZI 1,2,7,8,9
QZ 2,3,6,8,9 UX 1,2,3,5,7 YI 2,3,5,7,9 ZJ 1,3,7,8,9
RR 1,2,3,6,8,9 UZ 1,7,9 YJ 1,2,3,5,7,9 ZK 2,3,7,8,9
RV 3,4,6,8,9 VV 2,7,9 YK 4,5,7,9 ZL 1,2,3,7,8,9
RX 2,3,4,6,8,9 VW 1,2,7,9 YM 2,4,5,7,9 ZO 2,4,7,8,9
RZ 1,2,5,6,8,9 VX 3,7,9 YO 3,4,5,7,9 ZQ 3,4,7,8,9
SS 1,3,5,6,8,9 VY 1,3,7,9 YQ 2,3,4,5,7,9 ZS 2,3,4,7,8,9
ST 2,3,5,6,8,9 VZ 2,3,7,9 YS 1,2,7,8 ZU 1,2,5,7,8,9
SU 1,2,3,5,6,8,9 WW 1,2,3,7,9 YT 1,3,7,8 ZV 1,3,5,7,8,9
SW 1,2,7 WX 4,7,9 YU 2,3,7,8 ZW 2,3,5,7,8,9
SX 1,3,7 WZ 2,4,7,9 YV 1,2,3,7,8 ZX 1,2,3,5,7,8,9
SY 2,3,7 XY 3,4,7,9 YX 2,4,7,8 ZZ -
1. OEMCtrl is a registered trademark of Automated Logic.
2. OptiCORE is a trademark of OEMCtrl.

9
Fig. 2 — Equipment Touch 2™ Connection to Unit Controller
Controller Ports
The OptiCORE controller has sixteen universal outputs (UO) and
twenty-eight universal inputs (UI). All of the input and output (I/
O) settings are preconfigured from the factory to reflect the facto-
ry unit configuration.A predetermined amount of the controller’s
I/O are field configurable to the factory configurations. See Fig. 3
for typical controller layout.
UNIVERSAL INPUTS
All universal inputs can be set to read voltage, amperage, resis-
tance (temperature), and discrete contact. All inputs are config-
ured via software (Factory Program.) See Table 4 and 5 for typical
universal inputs.
NOTE: The universal inputs and analog outputs are
preconfigured at the factory for each factory option package
for the 62X series. Inputs UI-2, UI-4, UI-10, and UI-11 are set
to read 0 to 10 V. All other UIs are set to read resistance
(temperature) and dry contacts. Outputs UO-01, UO-02, UO-
04, UO-05, and UO-06 are set to output voltage. Outputs U-7
(Compressor modulation via Unloader (Digital compressor, 3-
18 tons) or VFD (Variable Speed compressor, 20-55 tons). See
Tables 4 and 5 for default controller configuration.
Table 4 — Inputs
NUMBER NAME SENSOR TYPE DESCRIPTION
OptiCORE LS-1628u CONTROLLER — UNIVERSAL INPUTS WITH ERV
UI-01 ECA-T Thermistor Entering Coil Air Temperature
UI-02 ECA-RH 0-10 vdc Entering Coil Relative Humidity
UI-03 SAT Thermistor Supply Air Temperature
UI-04 SA-RH 0-10 vdc Supply Air Relative Humidity
UI-05 OAT Thermistor Outside Air Temperature
UI-06 RAT Thermistor Return Air Temperature
UI-07 WExAT Thermistor Wheel Exhaust Air Temperature
UI-08 DxLAT1 Thermistor DX Coil Leaving Air Temperature 1
UI-09 DxLAT2 Thermistor DX Coil Leaving Air Temperature 2
UI-10 SF-DPT or AMS 0-10 vdc Supply Fan Duct Pressure Transducer or Airflow Monitoring Station
UI-11 ZN-DPT or AMS 0-10 vdc Zone (Building)/Exhaust Pressure Transducer or Airflow Monitoring
Station
UI-12 S/S contact Normally Open Contact Start/Stop Contact, (By Others) Occupancy Control must be set to
“S/S SWITCH” in the controls screen of the Equipment Touch
UI-13 OADA-A Normally Open Contact Two Position Outdoor Air Damper
UI-14 WM-CS Normally Open Contact Wheel Motor Current Sensor
UI-15 EF-CS Normally Open Contact Exhaust Fan Current Sensor
UI-16 SF-CS Normally Open Contact Supply Fan Current Sensor
UI-17 CC1-CS Normally Open Contact Cooling Circuit 1 Current Sensor
UI-18 LPS1 Normally Open Contact Low Pressure Switch Cooling Circuit 1
UI-19 HPS1 Normally Open Contact High Pressure Switch Cooling Circuit 1
UI-20 CC2-CS Normally Open Contact Cooling Circuit 2 Current Senosr
UI-21 LPS2 Normally Open Contact Low Pressure Switch Cooling Circuit 2
UI-22 HPS2 Normally Open Contact High Pressure Switch Cooling Circuit 2
UI-23 — — —
UI-24 — — —
UI-25 CFI Normally Open Contact Clogged Filter Indicator

10
LEGEND
UI-26 COS Normally Closed Contact Condensate Overflow Switch
UI-27 EMR Normally Closed Contact Energy Management Relay
UI-28 SD Normally Closed Contact Smoke Detector
OptiCORE LS-1628u CONTROLLER — UNIVERSAL INPUTS WITHOUT ERV
UI-01 OAT Thermistor Outside Air Temperature
UI-02 OA-RH 0-10 vdc Outside Air Relative Humidity
UI-03 SAT Thermistor Supply Air Temperature
UI-04 SA-RH 0-10 vdc Supply Air Relative Humidity
UI-05 — — —
UI-06 — — —
UI-07 — — —
UI-08 DxLAT1 Thermistor DX Coil Leaving Air Temperature 1
UI-09 DxLAT2 Thermistor DX Coil Leaving Air Temperature 2
UI-10 SF-DPT or AFS 0-10 vdc Supply Fan Duct Pressure Transducer or Airflow Monitoring Station
UI-11 ZN-DPT or AFS 0-10 vdc Zone / Exhaust Pressure Transducer or Airflow Monitoring Station
UI-12 S/S contact Normally Open Contact Start/Stop Contact, (By Others) Occupancy Control must be set to
“S/S SWITCH” in the controls screen of the Equipment Touch
UI-13 OADA-A Normally Open Contact Two Position Outdoor Air Damper
UI-14 WM-CS Normally Open Contact Wheel Motor Current Sensor
UI-15 EF-CS Normally Open Contact Exhaust Fan Current Sensor
UI-16 SF-CS Normally Open Contact Supply Fan Current Sensor
UI-17 CC1-CS Normally Open Contact Cooling Circuit 1 Current Sensor
UI-18 LPS1 Normally Open Contact Low Pressure Switch Cooling Circuit 1
UI-19 HPS1 Normally Open Contact High Pressure Switch Cooling Circuit 1
UI-20 CC2-CS Normally Open Contact Cooling Circuit 2 Current Senosr
UI-21 LPS2 Normally Open Contact Low Pressure Switch Cooling Circuit 2
UI-22 HPS2 Normally Open Contact High Pressure Switch Cooling Circuit 2
UI-23 — — —
UI-24 — — —
UI-25 CFI Normally Open Contact Clogged Filter Indicator
UI-26 COS Normally Closed Contact Condensate Overflow Switch
UI-27 EMR Normally Closed Contact Energy Management Relay
UI-28 SD Normally Closed Contact Smoke Detector
Table 4 — Inputs (cont)
NUMBER NAME SENSOR TYPE DESCRIPTION
BI —Binary Input
BO —Binary Output
UI —Universal Input
UO —Universal Output
VFD —Variable Frequency Drive

11
LEGEND
Table 5 — Outputs
NUMBER NAME SENSOR TYPE DESCRIPTION
OptiCORE LS-1628u CONTROLLER — UNIVERSAL OUTPUTS (LEAD CIRCUIT DIGITAL COMPRESSOR 03-18 TONS)
UO-01 SF1VFD 0-10 vdc Supply Fan VFD
UO-02 EF1VFD 0-10 vdc Exhaust Fan VFD
UO-03 — — —
UO-04 MRC (RH) 0-10 vdc Modulating Reheat Controller
UO-05 WMVFD 0-10 vdc Wheel Motor VFD
UO-06 Mod. Heat / Staged Heat 0-10 vdc Modulating / Staged Heat (Gas, Electric, Hot Water)
UO-07 Unloader #1 (Binary) 24 vdc to Relay Digital Compressor Unloading Solenoid 1
UO-08 — — —
UO-09 SF Enable Relay/Triac Supply Fan / Exhaust Fan Enable
UO-10 Comp. #1 Enable Relay/Triac Compressor 1 Enable
UO-11 Comp. #2 Enable Relay/Triac Compressor 2 Enable
UO-12 HGRH Enable Relay/Triac Hot Gas Reheat Enable
UO-13 Heating Enable Relay/Triac Heating Enable
UO-14 OA Damper Enable Relay/Triac Outside Air Damper / ECW By-Pass Enable
UO-15 ERV Enable Relay/Triac ERV Enable
UO-16 Sub-Cooling Coil Enable Relay/Triac Sub-Cooling Coil Enable
OptiCORE LS-1628u CONTROLLER — UNIVERSAL OUTPUTS (LEAD CIRCUIT VARIABLE SPEED COMPRESSOR 20-55 TONS)
UO-01 SF1VFD 0-10 vdc Supply Fan VFD
UO-02 EF1VFD 0-10 vdc Exhaust Fan VFD
UO-03 — — —
UO-04 MRC (RH) 0-10 vdc Modulating Reheat Controller
UO-05 WMVFD 0-10 vdc Wheel Motor VFD
UO-06 Mod. Heat / Staged Heat 0-10 vdc Modulating / 2nd Stage Heat (Gas, Electric, Hot Water)
UO-07 CM1VFD 0-10 vdc Lead Circuit Variable speed compressor VFD
UO-08 — — —
UO-09 SF Enable Relay/Triac Supply Fan / Exhaust Fan Enable
UO-10 Comp. #1 Enable Relay/Triac Compressor 1 Enable
UO-11 Comp. #2 Enable Relay/Triac Compressor 2 Enable
UO-12 HGRH Enable Relay/Triac Hot Gas Reheat Enable
UO-13 Heating Enable Relay/Triac Heating Enable
UO-14 OA Damper Enable Relay/Triac Outside Air Damper / ECW By-Pass Enable
UO-15 ERV Enable Relay/Triac ERV Enable
UO-16 Sub-Cooling Coil Enable Relay/Triac Sub-Cooling Coil Enable
BI —Binary Input
BO —Binary Output
UI —Universal Input
UO —Universal Output
VFD —Variable Frequency Drive

12
Communication
See Fig. 3 and 4 for typical controller configuration.
LOCAL RNET ACCESS PORT
The LS-1628 controller is equipped with a Local Rnet Access
port. Access to modify, configure, and diagnose the controller is
achieved by attaching an Equipment Touch 2™ device to the Lo-
cal Rnet Access port. The Local Rnet Access port provides com-
munication to the Equipment Touch device. Power to the Equip-
ment Touch 2 is supplied by and external 24VDC power supply.
(See Fig. 4.) This port can also be utilized with a Carrier ZS2
space temperature sensor (optional) to monitor space temperature.
BAS COMMUNICATION
The LS-1628 controller Port 2a is configurable for EIA-232 or
EIA-485 (2-wire or 4-wire). The controller can be configured for
BACnet1 (MS/TP, Arc156, IP, Ethernet) with external Building
Automation Systems (BAS). See Appendix A for BAS integration
guide.
Fig. 3 — Control and Expansion Module
1. BACnet is a trademark of ASHRAE.
-
-
+
-
Port S1
Conguration
1's10's100's
Rnet
Rnet +
Gnd
Rnet -
+12V
Up
NET +
NET -
Shield
Port S1
NET +
NET -
Shield
Port S2
End of Net?
Yes
No
End of Net?
Yes
No
NET +
NET -
Shield
I/O Bus
NC
Data
Gnd
Act Net
0
5
0
5
0
5
0
5
OptiCORE
LS-1628u
12 Vdc out
AC Input, 162.5mA max
DC Input, 262.5 mA max
Service Port
1-MS/TP
2-ARCNET
4-Other
Gig-E-Port
Rx Tx
Rnet
PortS1
PortS2
I/O Bus
Custom
Gig-E
Sys/Net
Aux power out
AC Input, 200 mA max
DC Input, 500 mA max
Analog
Binary
(Dry Contact)
Analog
(0-20mA)
Analog
(0-10Vdc)
AO Hand
Override
Hand
Auto
O
-
UO-08
+
-
+
-
+UO-07
UO-06
UO-05 +-
UO-12
+
-
+
-UO-11
UO-10
UO-09
+
+-
UO-16
+
-
+
-UO-15
UO-14
UO-13
+
Up
Up
-
+++++ ++
-- - - - --
01
01
02
02
03
03
04
04
05
05
06
06
07
8270
+++++ ++
- - - - --
+
24 Vdc
+
Aux
+
+
+++++ ++
-- - - - --
Universal Inputs
24 Vdc
+++++ ++
-- - - - --
08
08
09
09
10
10
11
11
12
12
13
13
14
14
22
22
23
23
24
24
25
25
26
26
27
27
2815
15
16
16
17
17
18
18
19
19
20
20
21
21
+
+
+
+
24 Vdc
Aux
24 Vdc
+
-
UO-04
+
-
+
-
+
-UO-03
UO-02
UO-01
432
1
O
N
432
1
O N
432
1
O
N
432
1
O N
432
1
O
N
4
3
2
1
O N
432
1
O
N
432
1
O N
H
A
O
RV1
RV2
RV3
RV4
RV5
RV6
RV7
RV8
RV9
RV10
RV11
RV12
RV13
RV14
RV15
RV16
POT
CCW 0%
CW 100%
U001
SW1
U002
SW2
U003
SW3
U004
SW4
U005
SW5
U006
SW6
U007
SW7
U008
SW8
U009
SW9
U0010
SW10
U0011
SW11
U0012
SW12
U0013
SW13
U0014
SW14
U0015
SW15
U0016
SW16
FOR FIELD:
BACNET
CONNECTION
Power
24V
Vac/Vdc +
On/O
-

13
EQUIPMENT TOUCH™DEVICE
General
The accessory Equipment Touch is a touchscreen device that you
can attach to a controller to view or change its property values,
schedule equipment, view trends, and more, without having to ac-
cess the unit over a building automation system (BAS).
The Equipment Touch is the recommended start-up and user in-
terface for the LS-1628 controller found in all 62X Series units,
and can be used to configure, monitor, and control unit operation.
The Equipment Touch device features an illuminated, 4.3-in. col-
or pixel touchscreen display and connects to a single open (BAC-
net) equipment controller. Designed for indoor installation, it pro-
vides building occupants, facility managers, and installers a pow-
erful user interface for managing a single piece of HVAC
equipment. See Fig. 6 for Equipment Touch layout.
The unit is also compatible with the Equipment Touch App and
Field Assistant. The Equipment Touch App offers the same inter-
facing capabilities as the Equipment Touch Device. The App is
available in the Google Play Store and is compatible with android
devices. Field Assistant is a PC-based program that allows users to
view the unit control properties and parameters. Equipment Touch
App users will also need the USB link cable (available in the USB
Tech Tools Kit, Part Number USB-TKIT) and a micro USB to
USB adapter (Equipment Touch App only). Field Assistant users
will also need the USB Link Cable and a network cable. Please re-
fer to the Field Assistant guide for further details.
NOTE: Two Equipment Touch devices cannot be used on a sin-
gle controller simultaneously.
NOTE: The 62X unit is not compatible with System Touch™
device.
NOTE: Rev H 62X units are compatible with the Equipment
Touch 2 (P#: EQT2) and not with the previous version Equipment
Touch (P#: EQT1).
Device Connection
The Equipment Touch 2 requires 24VDC power. The 62X
includes a 24VDC power supply in the control box to power the
Equipment Touch 2.
NOTE: Do not power the Equipment Touch 2 from the controller
Rnet power. The Equipment Touch 2 communication connection
is made at the controller Rnet port. See Fig. 4 and 5 for Equipment
Touch wiring details.
The USB Link cable for Field Assistant can be attached at the lo-
cal Rnet access port on the LS-1628 or on the bottom of the ZS
zone temp sensor (if used). See Fig 5 for controller layout.
NOTE: The Equipment Touch 2 device requires the controller to
be powered in order to communicate with the controller.
Fig. 4 — Typical Equipment Touch Wiring
Fig. 5 — Typical Equipment Touch Layout

14
Equipment Touch Usage
The Equipment Touch 2 features intuitive operation to make con-
trol navigation easy. See Fig. 6. See Table 6 for some tips on using
and navigating through screens with the Equipment Touch. More
information can be found in the EQT2 TruVu™ ET Display in-
stallation and start-up guide.
Access Control
When accessing a screen or trying to edit a setting or set point that
may impact unit operation, the keypad will appear, and the user
will be required to enter a password to indicate their access level.
There are three user levels for accessing the Equipment Touch
screens and changing information:
User — requires no password. Has access to only some screens
and is not able to change or edit any critical information.
Admin — requires password 1111. Has access to most screens
and can change and edit most information. Admin access should
allow full start-up and operation of the equipment.
Factory — requires factory password. Has access to all screens
and can change and edit all information. Contact Carrier technical
support if factory password is needed.
Fig. 6 — Equipment Touch 2
Touch to display:
Home screen
Previous screen
Alarms screen
Touch a button to
display that screen
Table 6 — Navigation Buttons
Home Button - Press the home button from any screen to be taken back to the home screen.
Back Button - Press the back button to be taken to the previous screen
Alarm Button – Press the alarm button to be taken to the alarm screen. If the alarm button is shown in
black, no alarms are active. If the alarm button is red, there is an active alarm.
Link Button - Press the link button to be taken to the screen indicated by the link
Slider - A slider indicates that more information is available on a screen. Use the up or down arrows or
drag the location button in the middle to scroll through the screen.
Drop Down Menu - A box with a white border and arrow on the right side indicates that more op-
tions are available. Press on the button to see the full option list
Non-Editable Field - A box with a gray or no border and yellow texts indicates a non-editable field.
This value may be a sensor reading or a set point on a status screen. This information may be editable
on a different screen or with a different level of access.
Editable Field - A box with white border indicates an editable field. Press inside the box to edit the
values in the field.
Keypad - when it's necessary to enter information, such as the login screen or an editable box, the key-
pad will be displayed. The text shown in white box at the top of the keypad will be entered into the
screen. Use the cancel or done buttons on the bottom to exit out of the keypad and delete (cancel) or
save (done) the entered value.

15
CONTROL NAVIGATION
General
When using the Equipment Touch device to interface with the
LS-1628 controller, the screens, text, and options displayed will be
based upon the unit options and configuration for each unit. For
example, if a unit does not have heat, the heating set point, heating
status screen, heating PID screen, and heating related alarms will
not be displayed. The unit will not perform any heating related
tests during test mode.
Standby Screen
Standby screen is displayed when the Equipment Touch has been
idle for a preset period. See Fig. 7.
Fig. 7 — Standby Screen
The Standby screen will show the controller date and time (top
right corner) and the current operating condition/mode (bottom of
screen). Use the press to continue button or back button to exit the
Standby screen and open the last screen viewed prior to standby.
Use the home button to exit to the home screen.
Home Screen
The Home screen is the main access point to all additional screens
and displays the current unit operating mode/condition. The Home
screen can be accessed at any time by pressing the Home icon on
the top bar. See Fig. 8.
Fig. 8 — Home Screen
When an alarm is active, the top portion of the Home screen will
show the Reset Alarm function. To reset all active alarms, click on
the down arrow next to “No” and change the value to “Yes”. “Yes”
will display for 5 seconds and then change back to “No”. After a
2-minute delay, the Reset Alarm function will disappear if no ac-
tive alarms exist.
The main portion of the Home screen contains links to status
screens for individual components or modes. Pressing any of the
component names will bring you to the associated status screen.
The Home screen also contains a link to the Set Point screen (Stp/
DB) and the Technical Settings (Setup) screen.
Status Screens
Status screens can be accessed from the Home screen and will
show relevant information for the listed component or system,
such as operating status, modulation status, alarm status, sensor
readings, and set points. See Fig. 9.
Status screens do not allow for editing of information and do not
require a password to access. The bottom of the status screen may
contain links to other related screens, such as related components,
set points, or tech settings screens.
Damper Status
The Damper Status screen shows the status of the outdoor air
damper and the status of the smoke detector (if equipped) and the
energy management or emergency management relay (if config-
ured). See Fig. 9.
Fig. 9 — Damper Status Screen
The following statuses are available on the Damper status screen:
• OAD Status is the command of the Outside Air Damper
(BO6) on the expansion board (CLOSE/OPEN)
• OADA is the status feedback from the OD auxiliary con-
tact (CLOSED/OPENED), the Supply Fan will not start
until this status is OPENED.
• SD Status will show either NORMAL (N.C.) or ALARM
(N.O.).
• EMR is the status for an Emergency/Energy Management
Relay (N.C.), which is field wired to UI-27 of the expander
module. The EMR will show as ALARM when the relay is
open or NORMAL when the relay is closed. See EMR on
the Misc. Options B screen under Unit Control Config
(Home
 Setup  Unit Config.).
The Supply Fan Status screen shows the status and parameters for
the supply fan (SF) and the clogged filter indicator (CFI). See
Fig. 10.
Fig. 10 — Supply Fan Status Screen

16
The following information may be shown on the on the Supply
Fan status screen:
• SF Status is the command to start the supply fan (UO-09)
on the LS-1628 controller.
• SF-APS is status feedback of the air proven switch or Sup-
ply Fan current sensor (UI-16) on the LS-1628 controller.
• The next parameter (shown as SF DPT above) will show
the method of supply fan control (if equipped). The meth-
od of control will depend on the control configuration. Be-
low are the common configurations:
- SF DPT: The supply fan is set up for supply duct differ-
ential pressure transmitter (DPT) control and will control
to the fan to the duct pressure set point (SF SP). The
value next to the SF DPT is the current sensor reading in
inches water gauge (in. wg). The value next to SF SP is
the pressure set point in in. wg.
- SF AMS: The supply fan is set up for airflow monitor
station (AMS) control to the airflow set point (SF SP).
The value next to SF AMS is the current AMS reading in
cubic feet per minute (CFM). The value next to SF SP is
the airflow set point in CFM.
- ZN DPT: The supply fan is set up for zone differential
pressure transmitter (DPT) control and will control to the
zone pressure set point (SF SP). The value next to the ZN
DPT is the current sensor reading in in.wg. The value
next to SF SP is the pressure set point in in.wg.
• The SF Mod will display the percentage of the analog out-
put (UO-01).
• Minimum is the minimum speed of the supply fan. The de-
fault minimum speed is 50% (adjustable)
• CFI Status will display the status of the Clogged Filter In-
dicator (CFI).
• OFF Timer reflects the 2 minutes (adjustable) delay for the
supply fan shutdown.
The Exhaust Fan Status screen will be displayed if the unit has an
exhaust fan and will show the status and parameters for the EF.
See Fig. 11.
Fig. 11 — Exhaust Fan Status Screen
The following information may be shown on the Exhaust Fan sta-
tus screen:
• EF Status is the command to start the exhaust fan (UO-09)
on the LS-1628 controller.
• EF-APS is status feedback of the air proven switch or ex-
haust fan current sensor (UI-15)) on the LS-1628
controller.
• The next parameter (shown as EF DPT above) will show
the method of exhaust fan control (if equipped)
- ZN DPT: The exhaust fan is set up for zone differential
pressure transmitter (DPT) control and will control to the
zone pressure set point (EF SP). The value next to the
ZN DPT is the current sensor reading in in.wg. The value
next to EF SP is the pressure set point in in.wg.
- EF AMS: The exhaust fan is set up for airflow monitor
station (AMS) control to the airflow set point (EF SP).
The value next to EF AMS is the current AMS reading in
cubic feet per minute (CFM). The value next to EF SP is
the airflow set point in CFM.
- EF DPT: The exhaust fan is set up for exhuast duct dif-
ferential pressure transmitter (DPT) control and will con-
trol to the fan to the duct pressure set point (EF SP). The
value next to the EF DPT is the current sensor reading in
inches water gauge (in. wg). The value next to EF SP is
the pressure set point in in.wg.
• The EF Mod will display the percentage of the analog out-
put (UO-02).
• Minimum is the minimum speed of the exhaust fan. The
default minimum speed is 25% (adjustable)
• OFF Timer reflects the 2 minutes (adjustable) delay for the
exhaust fan shutdown.
The Energy Conservation Wheel (ECW) screen will be displayed
if the unit has an ECW and will show the status and parameters for
the ECW. See Fig. 12.
Fig. 12 — Energy Conservation Wheel Screen
The following information may be shown on the on the ECW
screen:
• Outdoor air temperature (OAT) and return air temperature
(RAT). The ECW will run when the difference of OAT and
RAT is greater or less than 3°F. The ECW is the command
to start the wheel (UO-15) on LS-1628 controller.
• ECW-CS is the status feedback from the current sensor.
The CS will close once current is detected from the ECW
motor.
• WExAT is the wheel exiting air temperature which con-
trols the wheel's speed via the PID for defrost control
(stop/jog or VFD defrost)
• DEF SP is the setpoint for the control of the ECW defrost
control (Default is 25°F).
• EC MOD displays the speed of the ECW in hertz.
The Cooling 1 status screen shows the status and parameters for
the first stage/circuit of cooling and the condensate overflow
switch. For units with two refrigerant circuits (12+ tons), a Cool-
ing 2 status screen will also be displayed with similar information.
See Fig. 13.

17
Fig. 13 — Cooling Status Screen
The following information may be shown on the on Cooling 1 sta-
tus screen:
• Clg Mode status indicates that the conditions are meet for
cooling.
• The next parameter (shown as OAT above) indicates the
sensor to enable compressor #1 or circuit #1. The type of
sensor will change depending on control configuration.
Common configurations include:
- Outdoor air temperature (OAT)
- Entering coil air temperature (ECAT, with ECW)
- Outdoor air temperature vs supply air temperature (OAT
vs SAT)
- Outdoor air enthalpy (OAE)
• Clg1 En SP is the setpoint to enable circuit #1. The set
point is adjustable on the Clg1 SP screen.
• DXLAT (DX coil leaving air temperature) indicates the
sensor to modulate the compressor.
• Clg1 MOD SP is the setpoint for modulating the compres-
sor. The setpoint is adjustable on the Clg1 SP screen.
• The C1 Mod will display the percentage of analog output
(UO-07).
• COS Status will display the status of the condensate over-
flow switch (COS) for the condensate drain pan
• MIN OFF Timer reflects the 5 minutes the compressor
must be off before restarting.
• MIN ON Timer reflects the 5 minutes the compressor must
be on before shutdown.
• Heating to Cooling (Htg to Clg) Timer is a 10-minute tim-
er for the heating mode to cooling mode switchover.
• RV Status will be displayed when the unit is a heat pump
(62H ASHP or 62W WSHP). The RV will display off
when the unit is in cooling mode or on when the unit is in
heat pump heating mode.
• Indicator Lights:
- C1 EN will light when the enable conditions are met.
- Y1 will light when the UO-10 or compressor #1 is com-
manded on.
- CMP1 will light when the compressor #1 current sensor
shows amperage.
- HPS1 and LPS1 will be light in their normal state (N.C.).
When they go into alarm the light will turn off.
- FRZ1 will light when the freeze alarm is active for Com-
pressor #1.
Units with two refrigerant circuits (size 12+ tons) will also have a
Cooling 2 status screen. The above information will also be dis-
played for the second circuit (except for the COS).
The Reheat status screen shows the status and parameters for the
liquid subcooling reheat (Sub-Cooling, if equipped) and hot gas
reheat (ReHeat). See Fig. 14.
Fig. 14 — Reheat Status Screen
The following information may be shown on the on Reheat status
screen:
• Sub-Cooling status will display the status of the liquid sub
cooling coil (if equipped).
• Reheat Status will display the status of the hot gas reheat
coil.
• Supply air temperature (SAT) indicates the sensor reading
for the SAT sensor.
• SAT SP is the setpoint for modulating the reheat system.
The setpoint is adjustable on the Clg 1 SP screen.
• RH Mod will display the percentage of analog output
(UO-04).
• Indicator Lights:
- HGRH Manual Override will light when placed in man-
ual override
The Dehumidification 1 status screen shows the status and param-
eters for dehumidification mode for the first refrigerant circuit. For
units with two refrigerant circuits (12+ tons), A Dehum 2 status
screen will also be displayed with similar information. See
Fig. 15.
Fig. 15 — Dehumidification Status Screen
The following information may be shown on the on Dehum status
screen:
• Outdoor air temperature (OAT)
• Dehum1 will display the status of the dehum mode.
• Lim SP is the low limit set point to enable the dehum mode
(typically based on OAT).

18
• The next parameter (shown as OADP above) indicates the
sensor to enable the dehum mode. The type of sensor will
change depending on the unit configuration. Common con-
figurations include:
- Outdoor air dew point (OADP) vs supply air dew point
(SADP)
- Entering coil dew point (ECDP, with ECW) vs supply air
dew point (SADP)
- Supply air relative humidity (SARH)
• EN SP is the setpoint to enable dehumidification based on
the configuration above.
• The next parameter (shown as SADP) status indicates the
sensor to control cooling during dehum mode. The type of
sensor will change depending on the unit configuration.
Common configurations include:
- Supply air dew point (SADP)
- Supply air relative humidity (SARH)
• MOD SP is the setpoint to modulate the cooling system
(lead compressor).
• DH1 Mod will display the percentage of analog output
(UO-07) during dehumidification operation.
The Heating status screen shows the status and parameters the unit
heat source (if equipped). See Fig. 16.
Fig. 16 — Heating Status Screen
The following information may be shown on the Heating status
screen:
• Htg Mode status indicates that the conditions are met for
heating.
• The next parameter (shown as OAT above) indicates the
sensor to enable heating. The type of sensor will change
depending on the unit configuration. Common configura-
tions include:
- Outdoor air temperature (OAT)
- Entering coil air temperature (ECAT, with ECW)
• Htg En SP is the setpoint to enable heating. The setpoint is
adjustable on the Htg SP screen.
• SAT indicates the unit supply air temperature sensor,
which is used to modulate the heat source.
• Htg SAT SP is the supply air temperature setpoint for mod-
ulating the heat soource. The setpoint is adjustable on the
Htg SP screen.
• The Htg Mod will display the percentage of analog output
(UO-06).
• Clg to Htg Timer is a 10-minute timer for the cooling
mode to heating mode switchover.
• Indicator Lights:
- Htg EN will light when the heating enable condition is
met.
The Heat Pump 1 status screen shows the status and parameters
the heat pump units (62H and 62W only). Units with two refriger-
ant circuits (12+ tons) will also have a Heat Pump 2 status screen.
See Fig. 17.
Fig. 17 — Heat Pump 1 Status Screen
The following information may be shown on the Heat Pump 1 sta-
tus screen:
• RV Status will display Off when the heat pump unit is in
cooling mode and ON when the unit is in heat pump heat-
ing mode.
• Htg Mode status indicates that the conditions are met for
Heat pump heating.
• OAT indicates the sensor to enable compressor #1 or cir-
cuit #1.
• HP1 En SP is the setpoint to enable compressor #1 or cir-
cuit #1. The setpoint is adjustable on the HP1 SP screen.
• SAT indicates the sensor to modulate the compressor.
• MOD SP is the setpoint for modulating the compressor.
The setpoint is adjustable on the HP1 SP screen.
• The C1 Mod will display the percentage of analog output
(UO-07).
• MIN OFF Timer reflects the 5 minutes the compressor
must be off before restarting.
• MIN ON Timer reflects the 5 minutes the compressor must
be on before shutdown.
• Clg to Htg Timer is a 10-minute timer for the heating mode
to cooling mode switchover.
• Indicator Lights:
- HP1 EN will light when the enable conditions are met.
- Y1 will light when the UO-10 or compressor #1 is com-
manded on.
- CMP1 will light when the compressor #1 current sensor
show amperage.
- HPS1 and LPS1 will light in their normal state (N.C.).
When they go into alarm the light will go off.
- AHTG will light when the auxiliary heat is “on”, all
compressors will shut down.
- EHTG will light when the emergency heat is “on” and
the heat pump 1 shut down.
- WFS will light when there is water flow (used on 62W
units only).
- WFRZ will light when the water freeze stat is closed or
normal state (used on 62W units only).
- DR1 will light when the defrost relay is activated (used
on 62H units only).
Set Points Screens
The set points screen can be access form Home screen
(Home  Stp/DB) or Tech Setting screen (Setup  Setpoint/DB)
and contains links to all available component, safety, and mode set
point screens. See Fig. 18.

19
Fig. 18 — Setpoints
Pressing a link will open the set point screen for the indicate com-
ponent. Because set points can affect unit operation, an Admin
(1111) or Factory password is required to access setpoint screens.
SET POINTS SCREENS OVERVIEW
Set point (SP) screens list the operating set points for the listed
component or system. The SP screen will list the applicable devic-
es (left side of the screen), the operating set point (right side of the
screen) and the sensor that the set point is referencing (middle of
the screen). The listed sensor could be a physical sensor or calcu-
lated value based on multiple sensors. The set point and the sensor
will share the same units.
The availability of components, sensors, and set points are based
on the unit configuration and control configuration. Refer to the
Config screen under Tech Settings for available configurations.
Fan Set Points
The Fan set points screen (Home  Stp/DB  Fan SP) displays set
points for the supply and exhaust (if equipped) fans. See Fig. 19.
Fig. 19 — Fan SP
Each fan can only control to one set point, so the screen should
only list one set point for each fan. The following set points may
be displayed on the Fans SP screen:
Supply Fan or Exhaust Fan Mod:
• Airflow measuring (AMS) - fan will modulate to the CFM
set point
• Duct pressure (DPT) - fan will modulate to the duct pres-
sure set point (in. wg).
• Zone pressure (ZNDPT) - fan will modulate to maintain
the building pressure set point (in. wg). Typical for units
with exhaust fan. May also be used on supply only units
for space pressure control.
ECW Set Points
The ECW set points screen (Home  Stp/DB  ECW SP) displays
set points for the energy conversation wheel (if equipped). See
Fig. 20.
Fig. 20 — ECW SP
The following set points may be displayed on the ECW SP screen:
ECW Defrost:
• WExAT - when the wheel exhaust air temp drops below
this temperature, the ECW slows to prevent frosting (de-
fault SP is 25 °F, adjustable).
Cooling 1 Set Points
The Cooling 1 set points screen (Home  Stp/DB  Clg1 SP) dis-
plays the set points for the first stage of cooling (C1) and cooling
mode. See Fig. 21.
Fig. 21 — Clg 1 SP
Units 45 tons and above use tandem compressors, so C1 will be
two compressors on the first circuit. The following set points may
be displayed on the Clg 1 SP screen:
COOLING 1 ENABLE:
• OAT - C1 is enabled when the outdoor air temp is above
the set point
• OAE - C1 is enabled when the outdoor air enthalpy is
above the set point. Enthalpy is calculated from outdoor air
temp and RH%
• OAT & SAT - C1 is enabled when the outdoor air temp is
above the supply air temp set point.
• ECAT - for units with ERV, C1 is enabled when the enter-
ing coil air temp (treated OA after ECW) is above the
ECAT set point.
COOLING 1 MOD:
• DXLAT - C1 will modulate to the evaporator (DX) coil
leaving air temperature. All 62X units feature a modulat-
ing lead circuit compressor. The DX LAT is also used
during dehumidification mode and should match the re-
quired supply air dew point.

20
COOLING:
• SAT - In cooling mode, the unit will operate to maintain
the cooling supply air temperature set point. If the unit
SAT drops below set point, HGRH is enabled to reheat the
SAT up to set point
• ZAT - Used for zone air temp override. When the ZAT is
above set point, unit will enter ZAT/SAT override.
Cooling 2 Set Points
The Cooling 2 set points screen (Home  Stp/DB  Clg2 SP) dis-
plays the set points for the second stage of cooling (C2). Only
available on units 10 tons and larger. See Fig. 22.
Fig. 22 — Clg 2 SP
Units 40 tons and above use tandem compressors, so C2 will be
two compressors on the second circuit. The following set points
may be displayed on the Clg 2 SP screen:
COOLING 2 ENABLE:
• OAT - C1 is enabled when the outdoor air temp is above
the set point
• OAE - C1 is enabled when the outdoor air enthalpy is
above the set point. Enthalpy is calculated from outdoor air
temp and RH%
• OAT vs. SAT - C1 is enabled when the outdoor air temp is
above the supply air temp set point.
• ECAT/ECAE - for units with ERV. Operation is based
upon entering coil (EC) conditions, which is the per-treat-
ed outdoor air leaving the ECW and entering the evap coil.
Dehumidification Set Points
The Dehumidification set points screen (Home  Stp/DB  DH
SP/DB) displays the set points and deadband for dehumidification
mode. See Fig. 23.
Fig. 23 — DH SP/DB
When dehumidification mode is enabled, the cooling circuit
(compressors) are controlled to the DX LAT set point (Clg 1 SP)
to dehumidify the hot/humid outdoor air. The cooled and
dehumidified air then passes to through the reheat system, which
heats the supply air up to the SAT set point. The SAT set point
should be at or near the space temperature set point (68 to 72°F) to
prevent overcooling the space. The following set points may be
displayed on the Dehum SP/DB screen:
DEHUM ENABLE:
• OADP vs SADP - Dehum mode is enabled when the out-
door air dew point is above the supply air dew point set
point
• OADP - Dehum mode is enabled when the outdoor air dew
point is above the set point
• OAE - Dehum mode is enabled when the outdoor air en-
thalpy is above the set point.
• SARH - Dehum mode is enabled when the supply air
RH% is above set point.
• ECAT/ECAE - for units with ERV. Operation is based
upon entering coil (EC) conditions, which is the per-treat-
ed outdoor air.
DEHUM:
• SAT - In dehumidification mode, the HGRH will operate
to maintain the dehum supply air temperature by reheating
the air leaving the evaporator coil to the SAT set point
DEADBAND:
SAT - The upper and lower deadband for the reheat supply air
temperature.
Heating Set Points
The Heating set points screen (Home  Stp/DB  Htg SP/DB)
displays the set points and deadbands for the heat source and heat-
ing mode (if equipped). See Fig. 24.
Fig. 24 — Htg SP/DB
The following set points may be displayed on the Htg SP/DB
screen:
HEATING 1 ENABLE:
• OAT - Heating mode is enabled when the outdoor air temp
is below set point
• OAT vs SAT - Heating is enabled when the outdoor air
temp is below the heating supply air temp set point.
• ECAT - for units with ERV. Operation is based upon enter-
ing coil (EC) conditions, which is the per-treated outdoor
air
HEATING:
• SAT - In heating mode, the unit will operate the heat
source to maintain the heating supply air temperature set
point.
• ZAT - Used for zone air temp override. When the ZAT is
below set point, unit will enter ZAT/SAT override.