Carrier 09DK Series Installation, Start-Up And Service Instructions Manual page 10

09DK044 100% Circuiting Modification — To configure the
09DK044 for a single 100% refrigerant circuit using field sup-
plied parts, perform the following steps:
1. Remove all plastic caps. Refer to Fig. 12.
2. Attach following parts as shown in Fig. 12. Perform
phos-copper brazing on all field-made connections
while protecting adjacent joints from heat.
a. Construct one (1) gas tubing assembly (Item A),
consisting of the following parts, and braze it into
gas headers as shown:
2 —1 3 / -in. OD tubes
8
2 —1 / -in. 90° long-radius elbows
3
8
1 —1 3 / -in. tee (see note at right)
8
2 —1 3 / -in. OD nipples (cut to length as required)
8
b. Construct 2 gas "U" tube assemblies (Item B),
consisting of the following parts, and braze them
into the gas headers as shown.
1 —1 1 / -in. OD tube
8
2 —1 1 / -in. 90° long-radius elbows
8
2 —1 1 / -in. OD nipples (cut to length as required)
8
PLASTIC CAPS REMOVED FROM UNIT
A B
C
D
FIELD-SUPPLIED PARTS ADDED TO UNIT
Fig. 12 — 09DK044 Unit with 100% Circuiting
10
c. Construct one liquid tubing assembly (Item C),
consisting of the following parts, and braze it into
liquid headers as shown.
2 — 7 / -in. OD tubes
8
1 — 7 / -in. 90° long-radius elbow
8
1 — / -in. tee (see note below)
7
8
2 — 7 / -in. OD nipples (cut to length as required)
8
d. Construct 2 liquid "U" tube assemblies (Item D),
consisting of the following parts, and braze them
into the gas headers as shown.
1 — / -in. OD tube
5
8
2 — 5 / -in. 90° long-radius elbows
8
2 — 5 / -in. OD nipples (cut to length as required)
8
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
B
C