Argo CAFM1V Series Installation Instructions Manual page 21

04-408 InveterW_Techn_a-p50
Ball Valve Installation (for refrigerant R410A only)
Check the size of the ball valve set you separately purchased.
Model name
BV-RXP56AG
BV-RXP160AG
BV-RXP224AG
BV-RXP280AG
BV-RXP335AG
1. Installing the ball valve
(1) If the ball valve is to be installed on the outdoor
unit side, or for outdoor unit extension, install it so
that the service port faces the outdoor unit side.
(2) If the ball valve is to be installed for indoor unit
extension, or near an indoor unit, install it so that
the service port faces the indoor unit side.
(This facilitates indoor unit leak testing and vacu-
um procedures.)
Install the ball valve as close as possible to the
distribution joint.
CAUTION
2. Flare nut tightening, welding plug
The flare nut on the service port side is fully tight-
ened. In the case of the welded type, a plug is
welded in place.
If the valve is used for extension, it can be used
as-is. In all other cases, use 2 monkey wrenches
in combination to loosen the flare nut. In the case
of the brazed type, heat with a brazing torch and
remove the plug. At this time, use a damp shop-
cloth or other means to cool the brazed-type ball
valve unit while using the torch.
When performing brazing, be sure to replace the
air in the tubing with nitrogen in order to prevent
the formation of oxide film.
12/16/04 3:12 PM Page 21
Valves with φ 19.05, φ 22.22, or φ 25.4 connections are brazing type.
Size
φ 6.35 • φ 12.7
All others are flare-nut type.
φ 9.52 • φ 15.88
φ 9.52 • φ 19.05
φ 9.52 • φ 22.22
φ 12.7 • φ 25.4
This ball valve is for use
only in systems that utilize
refrigerant R410A. The ser-
vice port connection size is
φ φ 7.94. The face-to-face dis-
tance between the φ φ 12.7 or
φ φ 15.88 flare nuts is 26 mm
or 29 mm, respectively.
Be sure to use only the
supplied flare nuts. Be
careful to use the correct
tools and materials.
Outdoor unit
Outdoor unit
extension
Ball valve
Service
port
Indoor unit
Cool with damp shopcloth or other
means when heating brazed plug
with torch.
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Service port
Ball valve
Indoor
Outdoor
Indoor unit extension
Fully tightened (this side only)
Service port
Plug
(this side only)
Service port