Carrier 09DK Series - Page 14

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
/
8
-in. OD tubes (cut to length as required)
2 — 1
1
/
8
-in. 90° long-radius elbows
2 — 1
1
/
8
-in. OD nipples (cut to length as required)
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
/
8
-in. OD tubes (cut to length as required)
2 —
5
/
8
-in. 90° long-radius elbows
2 —
5
/
8
-in. OD nipples (cut to length as required)
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
/
8
-in. OD tubes (cut to length as required)
2 — 1
1
/
8
-in. 90° long-radius elbows
2 — 1
1
/
8
-in. OD nipples (cut to length as required)
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
/
8
-in. OD tubes (cut to length as required)
2 —
5
/
8
-in. 90 long-radius elbows
2 —
5
/
8
-in. OD nipples (cut to length as required)
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
C
B
D
PLASTIC CAPS REMOVED FROM UNIT
FIELD-SUPPLIED PARTS ADDED TO UNIT
Fig. 16 — 09DK044 Unit with 53/47% Circuiting