Carrier 09DK Series Installation, Start-Up And Service Instructions Manual page 14

09DK044 53/47% Circuiting Modification — To config-
ure the 09DK044 for two refrigerant circuits (one with 53%
capacity and one with 47% capacity) using field supplied
parts, perform the following steps:
1. Remove all plastic caps. Refer to Fig. 16.
2. Attach following parts as shown in Fig. 16. Perform
phos-copper brazing on all field-made connections
while protecting adjacent joints from heat.
a. Construct the 53% gas tubing assembly (Item A),
consisting of the following parts, and braze it into
gas headers as shown in Fig. 16, Item A:
2 — 1 1 / -in. OD tubes (cut to length as required)
8
2 — 1 1 / -in. 90° long-radius elbows
8
2 — 1 / -in. OD nipples (cut to length as required)
1
8
b. Construct the 53% liquid tubing assembly
(Item B), consisting of the following parts, and
braze it into liquid headers as shown in Fig. 16,
Item B:
2 — 5 / -in. OD tubes (cut to length as required)
8
2 — 5 / -in. 90° long-radius elbows
8
2 — / -in. OD nipples (cut to length as required)
5
8
PLASTIC CAPS REMOVED FROM UNIT
A
B
FIELD-SUPPLIED PARTS ADDED TO UNIT
Fig. 16 — 09DK044 Unit with 53/47% Circuiting
14
c. Construct the 47% gas tubing assembly (Item C),
consisting of the following parts, and braze it into
gas headers as shown in Fig. 16, Item C:
2 — 1 1 / -in. OD tubes (cut to length as required)
8
2 — 1 1 / -in. 90° long-radius elbows
8
2 — 1 / -in. OD nipples (cut to length as required)
1
8
d. Construct the 47% liquid tubing assembly
(Item D), consisting of the following parts, and
braze it into liquid headers as shown in Fig. 16,
Item D:
2 — 5 / -in. OD tubes (cut to length as required)
8
2 — 5 / -in. 90 long-radius elbows
8
2 — / -in. OD nipples (cut to length as required)
5
8
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.
C
D