WEATHERMAKER
®
48/50AJ,AK,AW, AY,A2,A3,A4,A5020-060
Single Package Large Rooftop Units
with COMFORTLINK
Ti Version 5.x Controls
Controls, Start-Up, Operation,
Service and Troubleshooting
CONTENTS
Page
SAFETY CONSiDERATiONS
.........................
2
GENERAL .........................................
2,3
Conventions
Used in this Manual ....................
3
BASIC CONTROL USAGE ..........................
3-6
ComfortLink Controls
...............................
3
Scrolling Marquee ...................................
4
Accessory
Navigator
TM
Display ......................
4
Operation ............................................
4
System Pilot
TM
Interface .............................
5
CON Tables and Display .............................
5
• GENERICS STATUS DISPLAY TABLE
START-UP ........................................
7-27
Unit Preparation .....................................
7
Unit Setup ...........................................
7
Internal Wiring .......................................
7
Accessory
Installation ...............................
7
Crankcase Heaters ..................................
7
Evaporator Fan ......................................
7
Controls .............................................
7
Gas Heat ............................................
7
CONTROLS QUICK START ......................
27-29
Two-Stage Constant Volume Units with
Mechanical Thermostat
..........................
27
Two-Stage Constant Volume Units with
Space Sensor ....................................
27
Variable Air Volume Units Using Return Air Sensor
or Space Temperature Sensor ....................
28
Multi-Stage Constant Volume Units with
Mechanical Thermostat
..........................
28
Multi-Stage Constant Volume Units with
Space Sensor ....................................
28
Economizer Options ................................
28
Indoor Air Quality Options ..........................
29
Exhaust Options ....................................
29
Programming Operating Schedules ................
29
SERVICE TEST ..................................
29,30
General .............................................
29
Service Test Mode Logic ...........................
29
Independent Outputs ...............................
30
Fans in Service Test Mode .........................
30
Cooling in Service Test Mode .......................
30
Heating in Service Test Mode .......................
30
THIRD PARTY CONTROL ........................
3L32
Thermostat .........................................
3]
Alarm Output .......................................
3]
Remote Switch .....................................
3!
VFD Control ........................................
3]
Supply Air Reset ...................................
3]
Demand Limit Control ..............................
3]
Demand Controlled Ventilation Control .............
3!
CONTROLS OPERATION ........................
32-75
Modes ..............................................
32
• SYSTEM MODES
• HVAC MODES
Page
Unit Configuration Submenu .......................
35
Cooling Control ....................................
37
• SETTING UP THE SYSTEM
• MACHINE DEPENDENT CONFIGURATIONS
• SET POINTS
• SUPPLY AIR RESET CONFIGURATION
• COOLING CONFIGURATION
• COMPRESSOR SAFETIES
• COMPRESSOR TIME GUARDS
• COOL MODE SELECTION PROCESS
• COOLING MODE DIAGNOSTIC HELP
• SUMZ COOLING ALGORITHM
• DEMAND LIMIT CONTROL
• HEAD PRESSURE CONTROL
• ECONOMIZER INTEGRATION WITH
MECHANICAL COOLING
Heating Control
....................................
5O
• SETTING UP THE SYSTEM
• HEAT MODE SELECTION PROCESS
• TEMPERATURE DRIVEN HEAT MODE
EVALUATION
• HEAT MODE DIAGNOSTIC HELP
• INTEGRATED GAS CONTROL BOARD LOGIC
• RELOCATE SAT SENSOR FOR HEATING IN
LINKAGE SYSTEMS
• MORNING WARM UP
• TEMPERING MODE
Static Pressure Control ............................
57
• OPERATION
• SETTING UP THE SYSTEM
• STATIC PRESSURE RESET OPERATION
• RELATED POINTS
Fan Status Monitoring ..............................
59
• GENERAL
• SETTING UP THE SYSTEM
• SUPPLY FAN STATUS MONITORING LOGIC
Dirty Filter Switch ..................................
60
Economizer
........................................
60
• SETTING UP THE SYSTEM
• ECONOMIZER OPERATION
• UNOCCUPIED ECONOMIZER FREE COOLING
• ECONOMIZER OPERATION CONFIGURATION
• ECONOMIZER DIAGNOSTIC HELP
Building Pressure Control ..........................
63
• BUILDING PRESSURE CONFIGURATION
• CONSTANT VOLUME 2-STAGE CONTROL
OPERATION
• MULTIPLE POWER EXHAUST STAGE BUILDING
PRESSURE CONTROL OPERATION
• VFD POWER EXHAUST BUILDING PRESSURE
CONTROL
Smoke Control Modes ..............................
66
• FIRE-SMOKE INPUTS
• AIRFLOW CONTROL DURING THE
FIRE-SMOKE MODES
• RELEVANT ITEMS
Manufacturer
reserves the right to discontinue, or change at any time, specifications
or designs without notice and without incurring obligations.
Catalog No. 04-53480050-01
Printed in U.S.A.
Form 48/5OA-7T
Pg 1
5-08
Replaces:
48/50A-6T