Refrigeration Line Sets; Brazing Connections - International comfort products CAC075 Installation Instructions Manual

Split System Condensers
Installing Refrigerant Lines
Component Matches
Check to see that you have the proper system compo-
nents. APPROVED MATCHED SYSTEM COMPONENTS
MUST BE USED. Refer to the Sales Specification Sheet
or Split System Summary for match data, orifice sizes,
and recommended charge.
The suggessted charge values are for split systems using
25ft (7.5m) of refrigerant line between the indoor and out-
door units. If shorter or longer lines are used, the recom-
mended charge will have to be adjusted.

Refrigeration Line Sets

If it is necessary to add tubing in the field, use dehydrated or
dry sealed deoxidized copper refrigeration tube. DO NOT
use copper water pipe.
It is important that no tubing is cut or seals broken until
you are ready to actually make connections to the
evaporator and to the condenser section.
Do not remove rubber plugs or copper caps from the
tube ends until ready to make connections at evapora-
tor and condenser.
PLEASE! UNDER NO CIRCUMSTANCES LEAVE THE
LINES OPEN TO THE ATMOSPHERE FOR ANY
PERIOD OF TIME.
Be extra careful with sharp bends. This tubing can "kink"
very easily, and if this occurs, the entire tube length will
have to be replaced. Extra care at this time will eliminate
future service problems.
Suspension And Installation Of
Refrigeration Lines
DO NOT fasten liquid or suction lines in direct contact with
the floor or ceiling joist. Use an insulated or suspension
type of hanger. Keep both lines separate, and insulate the
suction line. Both lines should be insulated in extremely
long runs in an attic or underground in a raceway, 50' or
more.
Do not let refrigerant lines come in direct contact with
foundation. When running refrigerant lines through the
foundation or wall, the openings should be made large
enough to allow for a sound absorbing material to be
placed or installed between the tubing and the foundation.
This will prevent noise transmission between the tubing
and the wall section (foundation) or the building.
Installation Instructions For Condensing
Units That Are Higher Than Evaporator
It is recommended that vertical suction risers not be up-
sized. Proper oil return to the compressor should be main-
tained with suction gas velocity. If velocities drop below
1500 fpm (feet per minute), oil return will be decreased. An
oil trap should be installed every 20' of vertical suction line
riser (condenser above evaporator.) Refer to line sizing
charts.
501 01 1504 00
Oil Traps
Figure 3
Line Valves
The outdoor condensing unit is supplied with straight sweat
brass service valves with copper stubs.
All line valves are positioned to seal the refrigerant in the
condensing unit with gauge ports open to connecting lines
when the Schraeder valve is depressed. Gauge ports have
Schraeder installed and require use of charging hoses with
depressors.

Brazing Connections

Fire Hazard
Refrigerant and oil mixture under pressure could
ignite as it escapes and contacts brazing torch
resulting in Fire. Make sure the refrigerant charge
is properly removed from both the high and low
sides of the system before brazing any compo-
nent or lines.
FAILURE TO DO SO COULD RESULT IN BODILY
INJURY OR DEATH.
Before making braze connections, be sure all joints are
clean. Before heat is applied for brazing, nitrogen should
be flowing through the tubing to prevent oxidation and
scale formation on the inside of the tubing.
Liquid & Suction Lines
Fully annealed refrigeration lines should be used when
installing the system.
The following is the recommended method for making
braze connections at the refrigerant line connections:
1. Clean refrigerant tube end with emery cloth or steel
brush.
2. Use a suitable brazing alloy for copper to copper joints.
Installation Instructions
10" Max
3" Min.
20 ft.
20 ft.
5