Base Pan
Width x Dept (mm)
Tie Down Knockouts (mm)
Minimum Mounting Pad
Dimensions (mm)
A
B
C
596.9 x 596.9
111.0
458.8
182.6
660 x 660
800.1 x 800.1
166.7
627.1
231.8
889 x 889
Tie Down Knockouts
Clearance requirements — When installing, allow sufficient space for airflow clearance, wiring, refrigerant piping,
and service. Allow 30 in. (762.0 mm) clearance to service end of unit and 48 in. (1219.2 mm) (above unit. For
proper airflow, a 6-in. (152.4 mm) clearance on 1 side of unit and 12-in. (304.8 mm) on all remaining sides must
be maintained. Maintain a distance of 24 in. (609.6 mm) between units or 18 in. (457.2 mm) if no overhang within
12 ft. (3.66 m). Position so water, snow, or ice from roof or eaves cannot fall directly on unit. On rooftop
applications, locate unit at least 6 in. (152.4 mm) above roof surface.
Operating Ambient — The minimum outdoor operating ambient in cooling mode is 55°F (12.78°C), and the
maximum outdoor operating ambient in cooling mode is 125°F (51.67°C).
Step 3—Complete Refrigerant Piping Connections
Outdoor units may be connected to indoor units using field-supplied tubing of refrigerant
grade and condition. Do not
use less than 10 ft. of interconnecting tubing. When more than 80 ft. of interconnecting tubing and more than 20 ft.
of vertical lift is used, refer to Long Line Guideline Section.
If either refrigerant tubing or indoor coil is exposed to atmospheric conditions for longer than 5 minutes, it must be
evacuated to 500 microns to eliminate contamination and moisture in the system.
Run refrigerant tubes as directly as possible, avoiding unnecessary turns and bends. Suspend refrigerant tubes so
they do not damage insulation on vapor tube and do not transmit vibration to the structure. Also, when passing
refrigerant tubes through the wall, seal opening so that vibration is not transmitted to structure. Leave some slack in
refrigerant tubes between structure and outdoor unit to absorb vibration. Refer to separate indoor unit installation
instructions for additional information.
Outdoor Unit Connected To Factory Approved Indoor Unit Outdoor — Unit contains correct system refrigerant
charge for operation with indoor unit of same size when connected by 25 ft. (7m) of field supplied or factory
accessory tubing. Check refrigerant charge for maximum efficiency.
Make Piping Sweat Connections — Remove plastic caps from liquid and suction service valves. Use refrigerant
grade tubing. Service valves are closed from the factory and ready for brazing. After wrapping the service valve
R-410A systems operate at higher pressures than standard R-22 systems. Do not use R-22 service equipment
or components on R-410A equipment. No other refrigerant may be used in this system. Gage set, hoses, and
recovery system must be designed to handle R-410A. If you are unsure consult the equipment manufacturer.
Caution
Do not bury more than 36 in. of refrigerant pipe in the ground. If any section of pipe is buried, there must be a 6
in. vertical rise to the valve connections on the outdoor unit. If more than the recommended length is buried,
refrigerant may migrate to the cooler, buried section during extended periods of system shutdown. This causes
refrigerant slugging and could damage compressor at start-up.
Warning
Fig – 4: Lifting Unit
With Sling
Fig – 5: Rooftop/Ground
Mounting
Fig – 6: Tie Down
Knockouts
Page 10
Содержание 38C Series
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