BEHLER-YOUNG 348719-701 Muffler Kit Instruction Manual

348719-701 Muffler Kit
Instruction Manual

348719-701 Muffler Kit
For Use on 24/26VS 5 Ton Heat Pump Units Only (models 25VNA460/284ANV060)

INSTALLATION INSTRUCTIONS

NOTE: Read the entire instruction manual before starting the installation.

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance, or use can cause an explosion, fire, electrical shock, or other conditions which may cause death, personal injury, or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory-authorized kits or accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Use a quenching cloth for brazing operations. Have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions included in the literature and attached to the unit. Consult local building codes and current editions of the National Electrical Code ( NEC ) NFPA 70. In Canada, refer to current editions of the Canadian electrical code CSA 22.1. Recognize safety information. This is the safety-alert symbol
When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. Understand these signal words;
DANGER, WARNING, and CAUTION. These words are used with the safety alert symbol.
DANGER identifies the most serious hazards which will result in severe personal injury or death.
WARNING signifies hazards that could result in personal injury or death.
CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage.
NOTE is used to highlight suggestions that will result in enhanced installation, reliability, or operation.

WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death. Before installing, modifying, or servicing the system, the main electrical disconnect switch must be in the OFF position. There may be more than 1 disconnect switch. Lock out and tag the switch with a suitable warning label.
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could result in personal injury or equipment damage. Systems containing R-410A refrigerant operate at higher pressures than systems containing R-22 refrigerant. Do not use R-22 refrigerant service equipment or components on systems containing R-410A.
WARNING
PERSONAL INJURY AND ENVIRONMENTAL HAZARD
Failure to follow this warning could result in personal injury or death. Relieve pressure and recover all refrigerant before system repair or final unit disposal. Use all service ports and open all flow-control devices, including solenoid valves. Federal regulations require that you do not vent refrigerant to the atmosphere. Recover during system repair or final unit disposal.
CAUTION
CUT HAZARD
Failure to follow this caution may result in personal injury. Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing and gloves when handling parts.

INTRODUCTION

This instruction covers the installation of a Suction Muffler Kit designed to mitigate a “whistle” sound caused by the excessive refrigerant gas pulsations
Refer to Table 1 for kit contents..
This kit is designed for use on 24/26VS 5 Ton Heat Pump units only (Model no. 25VNA460/284ANV060). A221130
Fig. 1 – Muffler Kit
Table 1 – Kit Contents

348719-701 Muffler Kit: INSTALLATION INSTRUCTIONS

INSTALLATION

Step 1 – KIT PRE-ASSEMBLY
The following pre-assembly steps must be taken prior to installing the kit in the unit.
1. Braze the short leg of the Suction Tube to the Suction MufflerA221131
Fig. 2 – Braze Suction Tube to Suction Muffler
2. Remove the wire harness from the Pressure Transducer.
3. Braze the Pressure Transducer into the orifice in the top of the Suction Tube.
NOTE: Facing the Control Panel corner, remove the front Top Cover screws (at least 6) to allow it to tilt upward enough to clear the Control Panel.

Fig. 3 – Top Cover Screw Locations
Fig. 4 – Braze Pressure Transducer
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or improper operation.
Components must be wrapped in a heat-sinking material such as a wet cloth while brazing.
4. OPTIONAL: If a 3/4″ to 7/8″ swage tool is not available, Braze the included Adapter Tube to the Suction Muffler. Ensure the large side of the Adapter Tube (7/8″) is inserted into the muffler (see Fig. 4). A221159
Fig. 5 – Orientation of Adapter Tube in Muffler
Step 2 – KIT INSTALLATION
1. Remove power from the unit before following these instructions.
2. Pump system down and recover refrigerant
3. Completely remove the Control Panel and place it to one side. Leave the wires attached.
4. Cut the wire tie on the Suction Tube.A221143
Fig. 6 – Cut wire Tie on suction Tube
5. Remove the Temperature Sensor form the Suction Tube
6. Remove the Wire Harness from the Pressure Transducer.

A221133a
Fig. 7 – Temperature Sensor and Wire Harness Location
7. Mark for cutting
a. If a 3/4″ to 7/8″ swage tool is available, measure from the Suction Charging Port (small capillary tube) 11 1/4″ up the tube and make a mark for cutting. A221200
Fig. 8 – Swage Tool Available – Mark for Cutting
b. If a 3/4″ to 7/8″ swage tool is not available, measure from the Suction Charging Port (small capillary tube) 9″ up the tube and make a mark for cutting. A221201
Fig. 9 – Swage Tool Not Available – Mark for Cutting
8. Cut the Suction Tube at the marked line using a tube cutter. A221134
Fig. 10 – Cut Suction Tube at Marked Line
9. Unbraze the other side of the Suction Tube from the top of the Accumulator, and remove the piece of tube.

A221135
Fig. 11 – Unbraze Suction Tube from Top of Accumulator
10. Bell the exposed Suction Tube out using a 3/4″ to 7/8″ swage tool.
OPTIONAL: If a swage tool is not available and the Adapter Tube is used, skip this step.11. Braze in the new Muffler Kit assembly. One brazes joint connects the Suction Muffler to the belled-out Suction Tube, and the other connects the new tube to the top of the Accumulator.

A221137
Fig. 13 – Braze Joint Locations
12. Replace the Temperature Sensor on the Suction Tube below the muffler.
13. Reconnect the wire harness to the pressure transducer. Fig. 14 – Temperature Sensor and Wire Harness Location
14. Use a new wire tie to secure the wires to the Suction Tube below the installed Muffler Kit.

Fig. 15 – Secure Wires to Suction Tube with Wire Tie
15. Reinstall the unit control panel.
16. Evacuate and charge unit per Installation Instructions provided with the unit.

The manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
© 2022 Carrier. All rights reserved.
A Carrier Company
Edition Date: 07/22
Catalog No: IIK-348719-01
Replaces: New

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