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W42AC-B
Bard W42AC-B User Manual
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Literature Assembly
911-0772
Contains the following
:
2100
-034(G)
User’s Guide
2100
-479
Leak Test, Evacuation, Charging
2100
-692(H)
Wall-Mount PKG A/C Manual
2110
-1452
(G
)
Replacement Parts Manual
7960
-805(A)
S8201-
169
CCM Instructio
ns
7960
-810
Supplemental 50HZ Instructions
2
Table of Contents
User's Application Guide and Technical Product Overview
4
Default Chapter
4
Table of Contents
4
Overview
5
Documentation
6
Unit Literature Assembly - Documentation Provided with Your Units
6
Unit Installation
7
WALL MOUNT Products - Mounting the Product on Wall Surface
7
WALL MOUNT Products - Clearances for Outdoor Condenser Fan Airflow
8
WALL MOUNT Products - Clearances for Indoor Supply and Return Airflow
8
WALL MOUNT Products - Condensate and Defrost Drainage
9
I-TEC and Q-TEC Products - Installing the Product Inside a Room
10
I-TEC and Q-TEC Products - Clearances for Outdoor Condenser Fan Airflow
10
I-TEC and Q-TEC Products - Clearances for Indoor Supply and Return Airflow
11
I-TEC Air Path
11
Q-TEC Air Path
11
I-TEC and Q-TEC Products - Condensate Drainage
12
All Products - Power Supply Verification
13
Field-Supplied Voltage
13
Hertz (Frequency)
13
Single and Three Phase Power
13
Unit Maintenance
14
All Products - Filters and Filter Servicing
14
Outdoor Unit Wall Mount Room Air Filters
14
WALL MOUNT Products - Filters and Filter Servicing
15
I-TEC Indoor Products - Filters and Filter Servicing
16
Q-TEC Indoor Products - Filters and Filter Servicing
17
All Products - Coil Cleaning
18
Equipment Corrosion Protection
18
All Products - Condenser Airflow
19
Unit Operation
20
Air-To-Air Cooling Products (Air Conditioners)
20
Air-To-Air Cooling and Heating Products (Heat Pumps)
20
Cooling Mode
20
Heating Mode
20
Water-To-Air Cooling and Heating Products (Geothermal Heat Pumps)
21
Cooling Mode
21
Water Supply Systems
21
Dehumidification and Ventilation Operation
22
Dehumidification (Air-To-Air or Water-To-Air Systems)
22
Ventilation Options (Air-To-Air or Water-To-Air Systems)
22
Troubleshooting
23
All Units - Troubleshooting
23
General/Troubleshooting the Mechanical System
26
General
27
Recovery Equipment Rated for R-410A
27
Leak Detectors
27
Gauge Manifold
27
Attaching Gauge Manifold
27
Attaching Manifold Hose to Schrader Valve
28
Leak Test
28
Evacuation
28
Charging
29
Preliminary Charging Steps
29
Charging the System by Weight
29
Figures
30
Figure 1: Typical AC System Cooling Cycle
30
Figure 2: Typical HP System Cooling Cycle
31
Figure 3 Heating Cycle
32
Troubleshooting the Mechanical System
33
Air Conditioning & Heat Pump - Cooling
33
Low Suction - Low Head Pressure
33
High Suction - Low Head Pressure
33
Low Suction - High Head Pressure
33
High Suction - High Head Pressure
33
Heat Pump - Heating
33
Table of Contents
38
General Information
40
General
40
Shipping Damage
40
Additional Publications
40
Duct Work
42
Filters
42
Filter Removal/Installation
42
Switching Filter Sizes
43
Fresh Air Intake
44
Installation
45
Basic Installation Design and Application Planning
45
Condensate Water Drainage
45
Outdoor Area Inspection
45
Wall Construction
45
Indoor Ducted and Non-Ducted Applications
45
Indoor Return Airflow
45
Indoor Supply Airflow
45
Ducted Applications
46
Free Blow Applications
46
Thermostat or Indoor Temperature Sensor Placement
46
Unit Installation
46
Materials/Tool List
46
Wall Mount Installation to Wall Surface
47
Wall Preparation
47
Table 1 Clearance Required for Service Access and Adequate Condenser Airflow
48
Table 2 Minimum Clearances Required to
48
Wiring - Main Power
54
High Voltage Connections
54
Wiring - Low Voltage
55
Low Voltage (24VAC) Connections
55
Table 3 Additional Low Voltage Connections (if Applicable)
55
Unit Shutdown Feature
55
Airflow Switch
56
Alarm Relay Feature
56
Balanced Climate TM Feature
56
DDC Controls Feature
56
Dehumidification Feature
56
Dirty Filter Switch Indicator (DFS)
56
Discharge Air Sensor
56
Low Ambient Control (LAC)
56
Outdoor Temperature Switch and Freeze Protection Thermostat
56
Ventilation Features
56
Table 5 Wall Thermostats
57
Table 6 Humidity Controls
57
Table 7 CO 2 Controllers
57
Table 8 Thermostat Wire Size
57
Start up
60
General
60
Topping off System Charge
60
Safety Practices
60
Important Installer Note
60
High Pressure Switch
60
Three Phase Scroll Compressor Start up Information
60
Phase Monitor
61
Condenser Fan Operation
61
Service Hints
61
Sequence of Operation
61
Balanced Climate TM Mode
61
Vent Connection Plug
62
Compressor Control Module
62
Features
62
Delay-On-Make Timer
62
Short Cycle/Delay-On-Break
62
Low Pressure Detection
62
High Pressure Detection
62
Test Mode
62
Brownout Protection with Adjustment
62
Pressure Service Ports
63
Service
64
Troubleshooting Nidec Selectech Series ECM Motors
64
If the Motor Is Not Running
64
If the Motor Is Running
64
Model Selectech Communication Diagnostics
64
Fan Blade Setting Dimensions
66
R-410A Refrigerant Charge
66
Removal of Fan Shroud
66
Table 9 Fan Blade Dimensions
66
Table 10 Cooling Pressure - Standard Airflow
67
Table 11 Cooling Pressure - Balanced Climate Airflow
68
Table 12A Electrical Specs W42AC, W48AC
69
Table 12B Electrical Specs W60AC, W72AC
70
Setting Unit Airflow
71
Blower Speeds
71
Table 13 Recommended Airflow
71
Table 14 Blower Speeds for Unit Operational Modes
71
Heating
72
Speed Tap 1 - Vent/Blower Only
72
Speed Tap 2 - Balanced Climate
72
Speed Tap 3 - Default lo Cooling
72
Speed Tap 4 - Optional MED Cooling
72
Speed Tap 5 - Optional HI Cooling
72
Dirty Filter Switch
72
Required
74
Table 15 Indoor Blower Performance
75
Table 16 Maximum ESP Electric Heat Only
76
Table 17 Electric Heat
76
Table 18 Vent and Control Options
77
Table 19 Optional Accessories
78
Ventilation Delivery
79
Ventilation Delivery
80
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Installation Instructions
42 pages
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Bard W42AC-B Specifications
General
Brand
Bard
Model
W42AC-B
Category
Air Conditioner
Language
English
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