Grandaire 4860 User Manual

1
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service information
pack upon completion of work.
These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with the in-
stallation. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser’s
purposes, the matter should be referred to your installing dealer or local distributor.
Note : The manufacturer recommends installing only approved matched indoor and outdoor systems. All of the manufac-
turer’s split systems are A.H.R.I. rated only with TXV indoor systems. Some of the benefits of installing approved matched
indoor and outdoor split systems are maximum efficiency, optimum performance and the best overall system reliability.
Condensing Units
Installer’s Guide
Split System Heat Pump
Up to 18 SEER
2-3-4-5 Ton Capacity
R410A
Table of Contents
Section 1. Safety............................................................................2
Section 2. Unit Location Considerations.....................................3
Section 3. Unit Preparation...........................................................5
Section 4. Setting the Unit............................................................5
Section 5. Refrigerant Line Considerations................................6
Section 6. Refrigerant Line Routing.............................................7
Section 7. Refrigerant Line Brazing.............................................8
Section 8. Refrigerant Line Leak Check....................................10
Section 9. Evacuation..................................................................11
Section 10. Service Valves..........................................................11
Section 11. Electrical - Low Voltage...........................................12
Section 12. Electrical - High Voltage..........................................13
Section 13. Start Up.....................................................................14
Section 14. System Charge Adjustment....................................15
Section 15. System operation and Troubleshooting.................19
NOTE: Appearance of unit may vary.

Grandaire 4860 Specifications

General

Model Number	4860
Cooling Capacity (BTU/h)	48000
Heating Capacity (BTU/h)	48000
Voltage (V)	208/230
Phase	1

Summary

Safety Precautions

General Safety Warnings

Crucial safety precautions for handling refrigerant, electrical hazards, hot surfaces, and proper grounding.

Unit Preparation and Setting

Prepare The Unit For Installation

Steps for inspecting the unit for damage and checking refrigerant charge retention.

Pad Installation

Refrigerant Line Routing and Brazing

Braze The Refrigerant Lines

Step-by-step instructions for brazing refrigerant lines to service valves.

Refrigerant Line Leak Check and Evacuation

Check For Leaks

Procedure for pressurizing lines with nitrogen and checking for leaks using a soapy solution.

Evacuate the Refrigerant Lines and Indoor Coil

Process for evacuating the system to a specific micron level.

Service Valves

Open the Service Valves

System Start Up

System Start Up Procedure

Step-by-step procedure for safely starting the system after installation.

System Charge Adjustment

Weigh-In Method

Method for charging refrigerant based on weight, suitable for initial install or difficult conditions.

Subcooling Charging and Refrigerant Adjustment

Procedure for adjusting refrigerant using subcooling method in cooling mode.

System Operation and Troubleshooting

Control Logic Description

Sensors (Thermistors/Pressure Transducer)

Protection Functions

Fault Code Table

Comprehensive table listing system fault codes and their descriptions.

Troubleshooting

Diagnostic procedures for common system faults and error codes.