11
09DK044 74/26% Circuiting Modification — To configure
the
09DK044
for two refrigerant circuits (one with
74%
capacity and one with
26%
capacity) using field supplied
parts, perform the following steps:
1. Remove all plastic caps. Refer to Fig. 13.
2. Attach following parts as shown in Fig. 13. Perform
phos-copper brazing on all field-made connections
while protecting adjacent joints from heat.
a. Construct the 74% gas tubing assembly (Item A),
consisting of the following parts, and braze it into
gas headers as shown in Fig. 13, Item A:
2 —1
3
/
8
-in. OD tubes (cut to length as required)
2 —1
3
/
8
-in. 90° long-radius elbows
1 —1
3
/
8
-in. tee (see note at right)
2 —1
3
/
8
-in. OD nipples (cut to length as required)
b. Construct the 26% gas tubing assembly (Item B),
consisting of the following parts, and braze it into
the gas headers as shown in Fig. 13, Item B:
1 — 1
1
/
8
-in. OD tube (cut to length as required)
2 — 1
1
/
8
-in. 90° long-radius elbows
1 — 1
1
/
8
-in. tee (see note at right)
2 — 1
1
/
8
-in. OD nipples (cut to length as required)
c. Construct the 74% liquid tubing assembly
(Item C), consisting of the following parts, and
braze it into liquid headers as shown in Fig. 13,
Item C:
2 —
7
/
8
-in. OD tubes (cut to length as required)
2 —
7
/
8
-in. 90° long-radius elbows
1 —
7
/
8
-in. tee (see note at right)
2 —
7
/
8
-in. OD nipples (cut to length as required)
d. Construct the 26% liquid tube assembly (Item D),
consisting of the following parts, and braze it into
the gas headers as shown in Fig. 13, Item D:
1 —
5
/
8
-in. OD tube
2 —
5
/
8
-in. 90° long-radius elbows
1 —
5
/
8
-in. tee (see note below)
2 —
5
/
8
-in. OD nipples (cut to length as required)
e. Plug the two open 1
1
/
8
-in. diameter stub tubes on
the gas headers and the two open
5
/
8
-in. diameter
stub tubes on the liquid headers as shown in
Fig. 13, Item E. Parts required:
2 —1
1
/
8
-in. plug fittings
2 —
5
/
8
-in. plug fittings
NOTE: Diameter of tee’s interconnecting pipe
opening is dependent upon interconnecting system
piping diameter. Refer to Carrier System Design
Manual, Part 3, for hot gas and liquid pipe sizing
information.
3. Install or replace filter drier(s).
Before charging the
system, install or replace filter drier(s) connected to
the liquid line near the indoor unit to prevent contami-
nation in the system.
A
E
B
E
C
E
D
E
PLASTIC CAPS REMOVED FROM UNIT
FIELD-SUPPLIED PARTS ADDED TO UNIT
Fig. 13 — 09DK044 Unit with 74/26% Circuiting
Summary of Contents for 09DK Series
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