Carrier 09DK Series, Инструкция по установке, запуску и обслуживанию

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09DK044 60/40% Circuiting Modification — To configure
the 09DK044 for two refrigerant circuits (one with 60%
capacity and one with 40% capacity) using field supplied
parts, perform the following steps:
1. Remove all plastic caps. Refer to Fig. 15.
2. Attach following parts as shown in Fig. 15. Perform
phos-copper brazing on all field-made connections
while protecting adjacent joints from heat.
a. Construct the 60% gas tubing assembly (Item A),
consisting of the following parts, and braze it into
gas headers as shown in Fig. 15, Item A:
2 — 1
1
/
8
-in. OD tubes (cut to length as required)
2 — 1 1 /
8
-in. 90° long-radius elbows
1 — 1 1 /
8
-in. tee (see note at right)
3 — 1 1 /
8
-in. OD nipples (cut to length as required)
b. Construct the 60% liquid-tubing assembly
(Item B) consisting of the following parts and
braze it into liquid headers as shown in Fig. 15,
Item B:
2 —
5
/
8
-in. OD tubes (cut to length as required)
2 — 5 /
8
-in. 90 long-radius elbows
1 — 5 /
8
-in. tee (see note at right)
3 — 5 /
8
-in. OD nipples (cut to length as required)
c. Plug the open 1
1
/
8
-in. diameter stub tube on the
left gas header and the open 5 /
8
-in. diameter stub
tube on the left liquid header as shown in Fig. 15,
Item C. Parts required:
1 — 1
1
/
8
in. plug fitting
1 — 5 /
8
-in. plug fitting
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.
C
A
C
B
PLASTIC CAPS REMOVED FROM UNIT
FIELD-SUPPLIED PARTS ADDED TO UNIT
Fig. 15 — 09DK044 Unit with 60/40% Circuiting