8
C
D
A
B
C11247
LOCATION DIMENSION CONDITION
A
48--- in. (1219 mm)
18--- in. (457 mm)
18--- in. (457) mm
12--- in. (305 mm)
Unit disconnect is mounted on panel
No disconnect, convenience outlet option
Recommended service clearance
Minimum clearance
B
42--- in. (1067 mm)
36--- in. (914 mm)
Special
Surface behind servicer is grou nded (e.g., metal, masonry wall)
Surface behind servicer is electrically non---conductive (e.g., wood, fiberglass)
Check sources of flue products within 10---ft of unit fresh air intake hood
C
36--- in. (914 mm)
18--- in. (457 mm)
Side condensate drain is used
Minimum clearance
D
42--- in. (1067 mm)
36--- in. (914 mm)
Surface behind servicer is grounded (e.g., metal, masonry wall, another unit)
Surface behind servicer is electrically non---conductive (e.g., wood, fiberglass)
NOTE: Unit not designed to have overhead obstruction. Contact Application Engineering for guidance on any application
planning overhead obstruction or for vertical clearances.
Fig. 4 -- Service Clearance Dimensional Drawing
REFRIGERATION SYSTEM
COMPONENTS
Eac h heat pump refrigerat ion system includes a
compressor, accumulator, reversing valve, dual--function
outdoor coil with vapor header check valve, cooling liquid
line with a filter drier and a check valve, dual--function
indoor coil with a vapor header check valve, and heating
liquid line with check a valve and a strainer. Size 07 units
have a single compressor--circuit; unit size s 08 through 09
have two compressor--circ uits. See Fig. 5 for typical unit
piping schematic (unit size 09 (4--row indoor coil) with
two compressor--circuits is shown).
Dual--functi on outdoor a nd indoor coils are designed to
provide parallel coil circuits during evaporator--func tion
operation and converging coil circuits during the
condenser--function operation.
Reversing Valve and Check Valve Position
See Fig. 5 (on page 9) and Tables 1, 2, and 3.
Troubleshooting Refrigerant Pressure Problems and
Check Valves
Refer to Fig. 5 and the Cooling Mode and Heating Mode
tables (Tables 1 and 2).
Refrigerant System Pressure Access Ports
There are two access por ts in each circuit -- on the suctio n
tube and the discharge tube near the compress or. These are
brass fittings with black plastic caps. The hose connection
fittings are s tand ard
1
/
4
--in. S A E male flar e couplin gs.
The brass fittings are two--piece High Flow valves, with a
receptacle base brazed to the tubing and an integral
spring --closed check valve core screwed into the base. See
Fig. 6 on page 9. This check valve is permanently
assemble d into this core body and cannot be serviced
separately. Replace the entire c ore body if necessary.
Service tools are available from RCD that allow the
replacement of the check valve core without having to
recove r the entire system refrigerant charge. Apply
compressor refrigerant oil to the check valve core’s
bottom O--ring. Install the fitting body and torque to
96 10 in--lbs (10.9 1 Nm). Do not exceed 106 in-- lbs
(11.9 Nm) when tightening.
Table 1 – Cooling Mode (each circuit)
Component Status/Position
Reversing Valve Energized
Check Valve A Closed
Check Valve B Open
Check Valve C Closed
Check Valve D Open
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