Torch Brazing; Soldering; Hvac System Components; Compressor - Central A/Csystem - PREVOST H3-41 Maintenance Manual

FIGURE 29: BELT LAYOUT
COMPRESSOR X-SERIES
3.7

TORCH BRAZING

Use electrode containing 35% silver.
NOTE
A 3.5% silver low
electrode can be used on low side pressure
and liquid high side.
CAUTION
When using heat near a valve, wrap with water
saturated rag to prevent overheating of vital
parts.
DANGER
Before welding any part of refrigeration system,
make sure the area is well ventilated.
3.8

SOLDERING

Before soldering any part of the system, make
sure the area is well ventilated. Use (stay clean)
flux sparingly and apply solder (95-5 round wire
1/8 inch [3,1 mm]). After completing repairs, test
for leaks.
When using heat at or near a valve, wrap with a
rag saturated of water to prevent overheating of
vital parts.
WITH SMALL A/C
temperature brazing
PA1621 Maintenance Manual All Series | Revised February 2019
SECTION 22: HEATING AND AIR CONDITIONING
4.

HVAC SYSTEM COMPONENTS

4.1 COMPRESSOR – CENTRAL A/C
SYSTEM
The central system is equipped with a Bitzer
4-cylinder model 4NFCY compressor. Refer to
paragraph 9 "Specifications" at the end of this
section.
For complete information
compressor maintenance, installation, torque
chart, approved oils, refer to the following Bitzer
manuals found on your Technical Publications
USB flash drive and on the Prevost Technical
Publications web site.
• Bitzer kw-540-1 Maintenance Instruction
• Bitzer kb-540-3 Operating Instructions
• Bitzer kw-541-2 Exchanging Shaft Seal
• Bitzer kw-555-3 Tightening Torques
• Bitzer kt-100-3 Capacity Control
(unloader)
• Bitzer ke-540-7 Spare Parts List
• Bitzer kt-510-5 Tech Info oils
4.1.1 Suction and Discharge Hose
Connection
1. Before connecting suction and discharge
refrigerant hoses to the compressor, apply
POE compressor oil on new gaskets, do not
dip in oil.
2. Tighten hose
sequences.
3. Apply a final torque on cap screws.
TORQUE: 31-35 lb-ft (42-47 Nm)
on Bitzer
flange by hand in
25
A/C
2