Bard W42AC-A - Table of Contents

Manual 2100-692H
Page 2 of 44
CONTENTS
General Information ............................................... 4
General
............................................................... 4
Shipping Damage
................................................. 4
Additional Publications
......................................... 4
Duct Work
........................................................... 6
Filters
................................................................. 6
Filter Removal/Installation ................................. 6
Switching Filter Sizes ....................................... 7
Fresh Air Intake
................................................... 8
Installation
............................................................... 9
Basic Installation Design and Application Planning
.. 9
Wall Construction ............................................. 9
Outdoor Area Inspection .................................... 9
Condensate Water Drainage ............................... 9
Indoor Ducted and Non-Ducted Applications
........... 9
Indoor Supply Airow ........................................ 9
Indoor Return Airow ........................................ 9
Ducted Applications ......................................... 9
Free Blow Applications.................................... 10
Thermostat or Indoor Temperature Sensor
Placement ..................................................... 10
Unit Installation
................................................. 10
Materials/Tool List .......................................... 10
Wall Preparation ............................................. 11
Wall Mount Installation to Wall Surface ............ 11
Wiring – Main Power
........................................... 18
High Voltage Connections ................................ 18
Wiring – Low Voltage
........................................... 19
Low Voltage (24VAC) Connections .................... 19
Unit Shutdown Feature ................................... 19
Balanced Climate
TM
Feature ............................. 19
Dehumidication Feature ................................ 20
Ventilation Features ........................................ 20
Low Ambient Control (LAC) ............................. 20
Outdoor Temperature Switch and Freeze
Protection Thermostat ................................. 20
Alarm Relay Feature ....................................... 20
DDC Controls Feature ...................................... 20
Dirty Filter Switch Indicator (DFS) ............... 20
Discharge Air Sensor .................................. 20
Airow Switch ............................................ 20
Compressor Current Sensor ......................... 20
Start Up
................................................................... 24
General
............................................................. 24
Topping Off System Charge
................................. 24
Safety Practices
................................................. 24
Important Installer Note
...................................... 24
High Pressure Switch
.......................................... 24
Three Phase Scroll Compressor Start Up
Information
........................................................ 24
Phase Monitor
.................................................... 25
Condenser Fan Operation
.................................... 25
Service Hints
..................................................... 25
Sequence of Operation
........................................ 25
Balanced Climate
TM
Mode ................................ 25
Vent Connection Plug
.......................................... 26
Compressor Control Module
................................. 26
Features ........................................................ 26
Delay-on-Make Timer ...................................... 26
Short Cycle/Delay-on-Break ............................. 26
Low Pressure Detection ................................... 26
High Pressure Detection .................................. 26
Test Mode ...................................................... 26
Brownout Protection with Adjustment ............... 26
Pressure Service Ports
........................................ 27
Service
..................................................................... 28
Troubleshooting Nidec SelecTech Series ECM
Motors
............................................................... 28
If the Motor is Running ................................... 28
If the Motor is Not Running ............................. 28
Model SelecTech Communication Diagnostics ... 29
Fan Blade Setting Dimensions
............................. 30
R-410A Refrigerant Charge
................................. 30
Removal of Fan Shroud
....................................... 30
Setting Unit Airow
............................................ 35
Blower Speeds ............................................... 35
Speed Tap 1 – Vent/Blower Only .................. 36
Speed Tap 2 – Balanced Climate ................. 36
Speed Tap 3 – Default LO Cooling &
Heating
............................... 36
Speed Tap 4 – Optional MED Cooling &
Heating
............................... 36
Speed Tap 5 – Optional HI Cooling &
Heating
............................... 36
Dirty Filter Switch
............................................. 36
Dirty Filter Switch Adjustment ......................... 36
FIGURES
Figure 1 Front Control Panel Cover ...................... 6
Figure 2 Removing Left Filter .............................. 6
Figure 3 Removing Second Filter ......................... 7
Figure 4 Filter Tabs in Up Position ....................... 7
Figure 5 Bend FIlter Tabs Down ........................... 7
Figure 6 Remove Four Screws ............................. 7
Figure 7 Re-Install Filter Support Brackets into
Lower Slots .......................................... 7
Figure 8 Re-Install Screws and Bend Tabs Up ....... 7
Figure 9 Install Right 2" Filter ............................. 8
Figure 10 Install Left 2" Filter ............................... 8
Figure 11 Fresh Air Damper .................................. 8
Figure 12 Vent Installation/Removal Clearance
Required ............................................ 12
Figure 13 Unit Dimensions ................................. 13
Figure 14 Mounting Instructions.......................... 14
Figure 15 Electric Heat Clearance ....................... 15
Figure 16 Wall Mounting Instructions .................. 16
Figure 17 Wall Mounting Instructions .................. 16
Figure 18 Common Wall Mounting Installations .... 17
Figure 19 High Voltage Connections .................... 18
Figure 20 Programmable Thermostat
Connections ....................................... 22
Figure 21 Non-Programmable Thermostat
Connections ....................................... 23
Figure 22
8201-169 Compressor Control Module ... 27