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MEGA-TEC W150A
Bard MEGA-TEC W150A Manuals
Manuals and User Guides for Bard MEGA-TEC W150A. We have
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Bard MEGA-TEC W150A manual available for free PDF download: Service Instructions Manual
Bard MEGA-TEC W150A Service Instructions Manual (159 pages)
Wall-Mount Air Conditioner
Brand:
Bard
| Category:
Air Conditioner
| Size: 7.92 MB
Table of Contents
Service Instructions
4
Table of Contents
4
General Information
6
Multi-Stage Cooling System
6
Wall-Mount Air Conditioner Units
6
General
6
Shipping Damage
6
Additional Publications
6
Using the TEC-EYE TM
8
TEC-EYE Hand-Held Diagnostic Tool
8
Figure 1 TEC-EYE Display and Interface
8
Figure 2 TEC-EYE Connection to Unit Control
8
Figure 3 Quick Menu Icons
9
Figure 4 Cool and Heat Setpoints
9
Main Status Screen
9
Quick Menu
9
Setpoints
9
TEC-EYE Acronyms
9
TEC-EYE Menu Structure
9
A/C Circuit Information
11
Figure 5 MEGA-TEC Refrigeration Circuits
11
Figure 6 A/C Circuit Measurements
11
Information
11
Alarm Log
12
Executing a Self Test
12
Figure 7 Software Version
12
Menu Screens and Password Levels
12
Program Version
12
Software Versioning Guide
12
Figure 8 Executing Self Test
13
Figure 9 Restoring Factory Default Settings
13
Reset to Factory Defaults
13
Self Test Parameter Descriptions
13
Operation
14
Unit On/Off
14
Alarm Adjustment
14
Acknowledging Alarms
14
Clearing Alarm Logs and Counters
14
Clearing Alarms
14
Exporting Alarm Logs
14
Figure 10 Clearing All Alarms
14
Figure 11 Clearing Alarm Logs and Counters
14
Configuration File
15
Exporting 7 Day Logs
15
Zone
15
Temperature Control
15
Figure 12 Changing Zone
15
Figure 13 Adjusting Return Air Temperature Sensor
15
Return Air Temperature Alarm
15
Return Air Temperature Sensor
15
Temperature Control Components
15
Cooling (with Economizer)
16
Cooling (Without Economizer)
16
Figure 14 Cooling (with Economizer)
16
LC6000 Control
16
Orphan Mode
16
Temperature Control Operation
16
Heating
17
Electronic Expansion Valve (EEV)
17
EEV Components
17
EEV Instructions for Vacuum, Reclaim, Charge Unit
17
Electronic Expansion Valve
17
Figure 15 Cooling (Without Economizer)
17
Figure 16 Heating
17
Figure 17 Overriding EEV Output
17
Figure 18 Electronic Expansion Valve (EEV) and Service Tool
18
Figure 19 Adjusting Suction Sensor/Transducer Pressure Values
18
Suction Pressure Transducer
18
System Pressures
18
Troubleshooting the Suction Pressure Transducer
18
Evaporator Freeze Condition Alarm
19
Figure 20 Voltage to Pressure: Suction Pressure Transducer
19
Figure 21 Adjusting Suction Temperature Sensor Values
19
Suction Pressure Alarm
19
Suction Temperature Alarm
19
Suction Temperature Sensor
19
Additional EEV Alarms
20
EEV Operation
20
EEV Superheat Control
20
Low Superheat Alarm
20
Indoor Airflow
20
Blower
20
Figure 22 Adjusting Evaporator Freeze Sensor Values
20
Figure 23 Putting Blower Output into Override Mode
20
Indoor Airflow Components
20
Blower Status Alarm
21
Blower Status Switch
21
Dirty Filter Switch
21
Figure 24 Dirty Filter Switch and Blower Status Switch
21
Figure 25 Verifying Differential Airflow Status
21
Filters
21
Blower Speed Control
22
Dirty Filter Alarm
22
Figure 26 Dirty Filter Switch and Filter Indicator Light
22
Filter Indicator Light
22
High Sensible Operation
22
Indoor Airflow Operation
22
Additional Indoor Airflow Alarms
23
Balanced Climate
23
Supply Air Temperature Alarm
23
Condenser Fan
23
Condenser Fan Components
23
Figure 27 Enabling/Disabling High Sensible or Balanced Climate Operation
23
Figure 28 Enabling Fan Override
24
Figure 29 Adjusting Discharge/Liquid Transducer Pressure Values
24
Figure 30 Voltage to Pressure: Discharge/Liquid Pressure Transducer
24
Liquid Pressure Sensor
24
Troubleshooting the Discharge/Liquid Pressure Transducer
24
Condenser Fan Operation
25
Condenser Fan Speed Control
25
Discharge/Liquid Pressure Transducer Alarm
25
Liquid Temperature Sensor
25
Outdoor Temperature Sensor
25
Compressor
25
Compressor Components
25
Figure 31 Adjusting Discharge/Liquid Temperature Input
25
Brownout Protection W/Adjustment
26
Compressor
26
Compressor Control Module (CCM)
26
Delay-On-Make Timer
26
Figure 32 8201-164 Compressor Control Module
26
High Pressure Detection
26
Short Cycle Protection/Delay-On-Break
26
Test Mode
26
High Pressure Safety Switch
27
Phase Monitor
27
Refrigerant High Pressure Alarm
27
Additional Compressor Alarms
28
Compressor Operation
28
Refrigerant Low Pressure Alarm
28
Economizer
28
Actuator
28
Economizer Components
28
Figure 33 Adjusting Compressor Delays
28
Figure 34 Damper Override
28
Dust Sensor
29
Dust Sensor Failure Alarm
29
Figure 35 Dust Sensor
29
Figure 36 Adjusting Dust Sensor Alarm Setpoint
29
High Dust Limit Alarm
29
Damper Blade
30
Damper Failed to Close Alarm
30
Damper Failed to Open Alarm
30
Damper Switch
30
Figure 37 Damper Blade Position
30
Figure 38 Damper Switch
30
Figure 39 Outdoor Temperature Sensor
31
Figure 40 Outdoor Humidity Sensor
31
Mixed Air Temperature Sensor
31
Outdoor Humidity Sensor Failure Alarm
31
Outdoor Temperature and Humidity Combination Sensor
31
Outdoor Temperature Sensor Failure Alarm
31
Economizer Operation
32
Figure 41 Mixed Air Temperature Sensor
32
Figure 42 Economizer Setup
32
High Mixed Air Temperature Alarm
32
Low Mixed Air Temperature Alarm
32
Figure 43 Economizer Setup - Dry Bulb Control
33
Figure 44 Economizer Setup - Temphum Control
33
Figure 45 Economizer Setup - Enthalpy Control
33
Economizer Operation - Minimum Position
34
Miscellaneous Components
34
Supply Temperature Sensor
34
Supply Temperature Sensor Failure Alarm
34
Emergency Cooling Mode
34
Emergency Cooling − Orphan Mode
34
Figure 46 Supply Air Temperature Sensor
34
Emergency Ventilation Mode
35
Electric Heat Option
35
Electric Heat Components
35
Electric Heat Operation
35
Electric Heating Element
35
Electric Reheat Dehumidification
35
Figure 47 Emergency Cool − Orphan Mode
35
Figure 48 Adjusting Return Air Alarm Settings
35
Thermal Overload
35
Electric Reheat Dehumidification Operation
36
Figure 49 Electric Reheat Dehumidification
36
Figure 50 Dehumidification Control (°F)
36
Figure 51 Unit Disable Option
37
Figure 52 Damper Power Output
37
Unit Disable Option
37
Figure 53 Override Damper Output
38
Figure 54 Serial/Model Number Configuration
38
Serial/Model Number Configuration
38
Figure 55 MEGA-TEC Model Nomenclature
39
Refrigerant Information
40
General
40
Topping off System Charge
40
Safety Practices
40
Important Installer Note
40
R410-A Refrigerant Charge
40
Pressure Service Ports
41
Maintenance
44
Standard Maintenance Procedures
44
Troubleshooting
45
Figure 56 Sensors and Peripheral Devices
45
Figure 57 Supply and Return Air Sensors
46
8301-089 Outdoor Temperature/Humidity Sensor
47
Figure 58 8301-089 Sensor DIP Switches and Terminal Block
47
8620-296 Supply Air Sensor/Return Air Sensor/Mixed Air Sensor/Suction Sensor/Liquid Sensor
50
8301-057 Blower Status Switch/Dirty Filter Switch
51
Figure 59 8301-057 Air Differential Switch
51
Alarm Index
52
Figure 60 Disconnect Condenser Fan Communication Wires
55
Figure 61 Unplug Modbus from Expansion Module
55
Figure 62 Verify Modbus Is Connected to PLC Board
55
Figure 63 Verify Blower Is Online
55
Figure 64 Reverse Polarity of Wires from Blower Motor
55
Modbus Troubleshooting for MEGA-TEC
55
Figures and Tables
56
Figure 65 DIP Switch Location
56
Figure 66 Check DIP Switch Position
56
Figure 67 Ventilation Airflow Paths
58
Table of Contents
64
General Information
65
List of Necessary Materials/Tools
68
Site Preparation
69
Model Identification
69
New Shelter Installation Vs. Retrofit Installation
69
Minimum Clearance
69
Clearance to Combustibles
70
Wall-Mount Unit Mounting
71
Mounting the Units
71
Wall-Mount Unit Wiring
76
Main Power Wiring
76
Unit Control Voltage Wiring
76
230/208V Wiring
76
460V Wiring
76
Preliminary Start up
79
Running in Orphan Mode
79
LC6000 Controller Installation
80
LC6000 Controller
81
Mounting the LC6000 Controller
81
Installing Remote Indoor Temperature/Humidity Sensor(S)
82
Sensor
83
Communication Wiring
86
Controller
86
Supply Wiring
91
System Set up
94
TEC-EYE Hand-Held Diagnostic Tool
94
TEC-EYE Status Screen
95
Setting up Wall-Mount Units for Operation
95
Address each Wall-Mount Unit
95
Execute a Self Test on each Unit
95
Clear Unit Alarm Logs on each Unit
96
Setting up LC6000 for Operation
96
Configure Sensors
97
Set LC Controller Date and Time
97
Enter Total Number of Units
100
Select Economizer Type for each Zone
100
Verify Units Are Online
100
10. Complete Installation
101
Clear Controller Alarm Logs
101
Additional Information
102
Menu Screens and Password Levels
102
Setpoints
102
Calibrating Sensors
102
Remote Indoor Temperature/Humidity Sensor
105
General
107
General
108
Attaching Gauge Manifold
108
Gauge Manifold
108
Leak Detectors
108
Recovery Equipment Rated for R-410A
108
Attaching Manifold Hose to Schrader Valve
109
Evacuation
109
Leak Test
109
Charging
110
Charging the System by Weight
110
Preliminary Charging Steps
110
Troubleshooting the Mechanical System
114
Air Conditioning & Heat Pump - Cooling
114
Heat Pump - Heating
114
High Suction - High Head Pressure
114
High Suction - Low Head Pressure
114
Low Suction - High Head Pressure
114
Low Suction - Low Head Pressure
114
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