Carrier 38AUQT/U25 Manuals

Manuals and User Guides for Carrier 38AUQT/U25. We have 1 Carrier 38AUQT/U25 manual available for free PDF download: Installation, Start-Up And Service Instructions Manual

Carrier 38AUQT/U25 Installation, Start-Up And Service Instructions Manual

Carrier 38AUQT/U25 Installation, Start-Up And Service Instructions Manual (52 pages)

Heat Pump Condensing Units with Puron (R-410A) Refrigerant

Brand: Carrier | Category: Heat Pump | Size: 5.31 MB

Table of Contents

Table of Contents
1
Safety Considerations
2
General
2
Rated Indoor Airflow (Cfm)
2
Installation Guideline
2
Replacement/Retrofit - R-22 to Puron Refrigerant
2
Acid Test
3
Installation
3
Installation
9
Jobsite Survey
9
Step 1 - Plan for Unit Location
9
Step 2 - Complete Pre-Installation Checks
9
Check Unit Electric Characteristic
9
Un-Crate Unit
9
Inspect Shipment
9
Consider System Requirements
9
Step 3 - Prepare Unit Mounting Support
9
Slab Mount
9
Refrigerant Line Sizing
10
Install Filter Driers and Moisture Indicators
10
Install Liquid Line Solenoid Valves
11
Capacity Control Liquid Line Solenoid Valve
11
Make Piping Connections
11
Evacuation/Dehydration
11
Preliminary Charge
12
Step 6 - Install Accessories
12
Step 7 - Complete Electrical Connections
12
Field Power Supply
12
Units Without Factory-Installed Disconnect
13
Units with Factory-Installed Disconnect
13
All Units
13
Voltage and Current Balance
13
Convenience Outlets
13
Installing Weatherproof Cover
14
All Units
14
Field Control Wiring
14
Thermostat
15
Pre-Start-Up
17
System Check
17
Turn on Crankcase Heater
17
Preliminary Charge
17
Start-Up
17
38AUQ Units
17
Preliminary Checks
17
Compressor Rotation
17
Compressor Overload
17
Advanced Scroll Temperature Protection (Astp)
17
Start Unit
18
Adjust Refrigerant Charge
18
Final Checks
18
Operating Sequence
20
Base Unit Controls
20
Indoor (Supply) Fan
20
Cooling, Unit Without Economizer
20
Cooling, Unit with Economizer
20
Defrost Cycle
20
Supplemental Heat/Emergency Heat
21
Cooling and Heating Shutdown
21
Fan Cycling
21
Maintenance
21
Quarterly Inspection  (and 30 Days after Initial Start)
21
Indoor Section
21
Seasonal Maintenance
21
Air Conditioning
21
Routine System Maintenance
22
Quarterly Inspection  (and 30 Days after Initial Start)
22
Indoor Section
22
Outdoor Section
22
Economizer or Outside Air Damper
22
Service
22
Refrigeration System
22
Compressor Oil
22
Servicing Systems on Roofs with Synthetic Materials
22
Liquid Line Filter Drier
22
Field Refrigerant Access Ports
23
Outdoor Coil Metering Devices
23
Refrigerant System Pressure Access Ports
23
Compressor Protection
24
Compressor Overcurrent
24
Compressor Overtemperature Protection (Ip)
24
Crankcase Heater
24
High Pressure Switch
24
Loss of Charge Switch
24
Outdoor Fan Motor Protection
24
Control Circuit, 24-V
24
Commercial Defrost Control
24
Reversing Valve Control
25
Compressor Control
25
Defrost
27
Defrost Thermostats
27

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