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MEGA-TEC W120AP
Bard MEGA-TEC W120AP User Manual
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Bard Manufacturing Company
, Inc.
Bryan, Ohio 43506
www
.bardhvac.com
Manual: 2100-671
Supersedes:
NEW
Date: 12-17-18
SER
VICE INSTRUCTIONS
MEGA-TEC
TM
W
ALL-MOUNT AIR CONDITIONER
Model W120AP
NOTE:
LC6000
controller is required for operation
when W120AP
units ar
e used.
2
Table of Contents
Default Chapter
2
Table of Contents
2
General Information
4
Multi-Stage Cooling System
4
Wall-Mount Air Conditioner Units
4
General
4
Shipping Damage
4
Additional Publications
4
Using the TEC-EYE TM
6
Using the TEC-EYE
6
Figure 2 TEC-EYE Connection to Unit Control
6
TEC-EYE Menu Structure
7
TEC-EYE Acronyms
7
Main Status Screen
7
Figure 3 Quick Menu Icons
7
FIGURES and TABLES Figure 1 TEC-EYE Display and Interface
6
TEC-EYE Hand-Held Diagnostic Tool
6
Unit Status Message
7
Quick Menu
8
A/C Circuit Information
8
Figure 4 Cool and Heat Setpoints
8
Figure 5 A/C Circuit Measurements
8
Information
8
Setpoints
8
Alarm Log
9
Menu Screens and Password Levels
9
Program Version
9
LC6000/TEC-EYE Passwords (Defaults)
9
Figure 6 Program Version
9
Executing a Run Test
10
Executing Run Test
10
Reset to Factory Defaults
10
Run Test Parameter Descriptions
10
Restoring Factory Default Settings
10
Operation
11
Unit On/Off
11
Alarm Adjustment
11
Acknowledging Alarms
11
Clearing Alarms
11
Clearing Alarm Logs and Counters
11
Exporting Alarm Logs
11
Figure 10 Clearing Alarm Logs and Counters
11
Figure 9 Clearing All Alarms
11
Exporting 7 Day Logs
12
Exporting Parameters
12
Zone
12
Temperature Control
12
Temperature Control Components
12
Figure 11 Changing Zone
12
Figure 12 Adjusting Return Air Temperature Sensor
12
Return Air Temperature Alarm
12
Return Air Temperature Sensor
12
Temperature Control Operation
12
Cooling (with Economizer)
13
Cooling (Without Economizer)
13
Figure 13 Cooling (with Economizer)
13
Figure 6 Figure
13
Heating
13
LC6000 Control
13
Orphan Mode
13
Electronic Expansion Valve (EEV)
14
EEV Components
14
EEV Instructions for Vacuum, Reclaim, Charge Unit
14
Electronic Expansion Valve
14
Figure 14 Cooling (Without Economizer)
14
Figure 15 Heating
14
Figure 16 Overriding EEV Output
14
Figure 17 Electronic Expansion Valve (EEV) and Service Tool
15
Figure 18 Adjusting Suction Sensor/Transducer Pressure Values
15
Suction Pressure Transducer
15
System Pressures
15
Troubleshooting the Suction Pressure Transducer
15
Evaporator Freeze Condition Alarm
16
Figure 19 Voltage to Pressure: Suction Pressure Transducer
16
Figure 20 Adjusting Suction Temperature Sensor Values
16
Suction Pressure Alarm
16
Suction Temperature Alarm
16
Suction Temperature Sensor
16
EEV Operation
17
Additional EEV Alarms
17
EEV Superheat Control
17
Low Superheat Alarm
17
Indoor Airflow
17
Indoor Airflow Components
17
Blower
17
Figure 21 Adjusting Evaporator Freeze Sensor Values
17
Figure 22 Putting Blower Output into Override Mode
17
Blower Status Alarm
18
Blower Status Switch
18
Dirty Filter Alarm
18
Dirty Filter Switch
18
Figure 23 Dirty Filter Switch and Blower Status Switch
18
Figure 24 Verifying Differential Airflow Status
18
Filters
18
Additional Indoor Airflow Alarms
19
Blower Speed Control
19
Filter Indicator Light
19
Indoor Airflow Operation
19
Supply Air Temperature Alarm
19
Condenser Fan
19
Condenser Fan Components
19
Figure 25 Dirty Filter Switch and Filter Indicator Light
19
Figure 26 Enabling Fan Override
20
Figure 27 Adjusting Discharge/Liquid Transducer Pressure Values
20
Figure 28 Voltage to Pressure: Discharge/Liquid Pressure Transducer
20
Liquid Pressure Sensor
20
Troubleshooting the Discharge/Liquid Pressure Transducer
20
Condenser Fan Operation
21
Condenser Fan Speed Control
21
Discharge/Liquid Pressure Transducer Alarm
21
Liquid Temperature Sensor
21
Outdoor Temperature Sensor
21
Compressor
21
Compressor Components
21
Figure 29 Adjusting Discharge/Liquid Temperature Input
21
Compressor Control Module (CCM)
22
Delay-On-Make Timer
22
Figure 30 8201-164 Compressor Control Module
22
High Pressure Detection
22
Short Cycle Protection/Delay-On-Break
22
Brownout Protection W/Adjustment
23
High Pressure Safety Switch
23
Phase Monitor
23
Refrigerant High Pressure Alarm
23
Test Mode
23
Compressor Operation
23
Additional Compressor Alarms
24
Refrigerant Low Pressure Alarm
24
Economizer
24
Economizer Components
24
Actuator
24
Figure 31 Adjusting Compressor Delays
24
Figure 32 Damper Override
24
Dust Sensor
25
Dust Sensor Failure Alarm
25
Figure 33 Dust Sensor
25
Figure 34 Adjusting Dust Sensor Alarm Setpoint
25
High Dust Limit Alarm
25
Damper Blade
26
Damper Failed to Close Alarm
26
Damper Failed to Open Alarm
26
Damper Switch
26
Figure 35 Damper Blade Position
26
Figure 36 Damper Switch
26
Outdoor Temperature and Humidity Combination Sensor
26
Figure 37 Outdoor Temperature Sensor
27
Figure 38 Outdoor Humidity Sensor
27
Figure 39 Mixed Air Temperature Sensor
27
High Mixed Air Temperature Alarm
27
Mixed Air Temperature Sensor
27
Outdoor Humidity Sensor Failure Alarm
27
Outdoor Temperature Sensor Failure Alarm
27
Economizer Operation
28
Figure 40 Economizer Setup
28
Low Mixed Air Temperature Alarm
28
Economizer Operation - Minimum Position
29
Figure 41 Economizer Setup - Dry Bulb Control
29
Figure 42 Economizer Setup - Temphum Control
29
Figure 43 Economizer Setup - Enthalpy Control
29
Emergency Cooling Mode
30
Emergency Cooling − Orphan Mode
30
Figure 44 Supply Air Temperature Sensor
30
Figure 45 Emergency Cool − Orphan Mode
30
Miscellaneous Components
30
Supply Temperature Sensor
30
Supply Temperature Sensor Failure Alarm
30
Electric Heat Components
31
Electric Heat Operation
31
Electric Heat Option
31
Electric Heating Element
31
Emergency Ventilation Mode
31
Figure 46 Adjusting Return Air Alarm Settings
31
Figure 47 Unit Disable Option
31
Serial/Model Number Configuration
31
Thermal Overload
31
Unit Disable Option
31
Figure 48 Serial/Model Number Configuration
32
Figure 49 MEGA-TEC Wall-Mount Unit Model Nomenclature
33
Refrigerant Information
34
General
34
Topping off System Charge
34
Safety Practices
34
Important Installer Note
34
R410-A Refrigerant Charge
34
Pressure Service Ports
35
Maintenance
36
Standard Maintenance Procedures
36
Troubleshooting
37
8301-089 Outdoor Temperature Temperature/Humidity Sensor
37
Figure 50 8301-089 Sensor DIP Switches and Terminal Block
37
Resistance
38
Table 9 8301-089 Sensor: Humidity/Ma
39
8620-296 Supply Air Sensor/Return Air Sensor/Mixed Air Sensor/Suction Sensor/Liquid Sensor
40
8301-057 Blower Status Switch/Dirty Filter Switch
41
Figure 51 8301-057 Air Differential Switch Terminals
41
Alarm Index
42
Table 11
42
Blower Speeds
44
5
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Bard MEGA-TEC W120AP Specifications
General
Brand
Bard
Model
MEGA-TEC W120AP
Category
Air Conditioner
Language
English
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