General; Controls; Unit Sizes; Conventions Used In This Manual - Carrier 38APS025 Manual

CAUTION
Puron ® refrigerant (R-410A) systems operate at higher
pressures than standard R-22 systems. Do not use R-22 ser-
vice equipment or components on Puron refrigerant equip-
ment. If service equipment is not rated for Puron
refrigerant, equipment damage or personal injury may
result.
CAUTION
Refrigerant charge must be removed slowly to prevent loss
of compressor oil that could result in compressor failure.
CAUTION
This unit uses a microprocessor-based electronic control
system. Do not use jumpers or other tools to short out com-
ponents, or to bypass or otherwise depart from recom-
mended procedures. Any short-to-ground of the control
board or accompanying wiring may destroy the electronic
modules or electrical components.
Be aware of electrostatic discharge (static electricity) when
handling or making contact with circuit boards or module
connections. Always touch a chassis (grounded) part to
dissipate body electrostatic charge before working inside
control center.
Use extreme care when handling tools near boards and
when connecting or disconnecting terminal plugs. Circuit
boards can easily be damaged. Always hold boards by the
edges and avoid touching components and connections.
This equipment uses, and can radiate, radio frequency
energy. If not installed and used in accordance with the
instruction manual, it may cause interference to radio
communications. It has been tested and found to comply
with the limits for a Class A computing device pursuant to
International Standard in North America EN61000-2/3
which are designed to provide reasonable protection
against such interference when operated in a commercial
environment. Operation of this equipment in a residential
area is likely to cause interference, in which case the user,
at his own expense, will be required to take whatever mea-
sures may be required to correct the interference.
Always store and transport replacement or defective boards
in anti-static shipping bag.

GENERAL

This publication contains controls, start-up, service, opera-
tion, and troubleshooting information for the Gemini™ Select
38AP condensing units with ComfortLink controls. The 38AP
air-cooled condensing units are intended for commercial com-
fort-cooling applications. Multiple scroll compressors are
staged to provide capacity control. The units are shipped with a
nitrogen holding charge and utilize Puron
(R-410A) as the operating refrigerant. See Table 1 for unit size
information.
UNIT SIZE
38APS025
38APD025
38APS027
38APD027
38APS030
38APD030
38APS040
38APD040
38APS050
38APD050
38APD060
38APS065
38APD070
38APD080
38APD090
38APD100
38APD115
38APD130
Conventions Used in This Manual —
ing conventions for discussing configuration points for the
local display (scrolling marquee or Navigator™ accessory)
will be used in this manual.
Point names will be written with the mode name first, then
any sub-modes, then the point name, each separated by an
arrow symbol (
and italics. As an example, the Lead/Lag Circuit Select Point,
which is located in the Configuration mode, Option sub-mode,
would be written as Configuration
This path name will show the user how to navigate through
the local display to reach the desired configuration. The user
would scroll through the modes and sub-modes using the
sents pressing
menu structure.
When a value is included as part of the path name, it will be
shown at the end of the path name after an equals sign. If the
value represents a configuration setting, an explanation will
be shown in parenthesis after the value. As an example,
Configuration OPT2 LLCS = 2 (Circuit A leads).
Pressing the
will scroll an expanded text description of the point name or
value across the display. The expanded description is shown in
the local display tables but will not be shown with the path
names in text.
The CCN (Carrier Comfort Network
referenced in the local display tables for users configuring the
unit with CCN software instead of the local display. The CCN
® refrigerant
tables are located in Appendix B of the manual.
General —
the ComfortLink electronic control system that controls and
monitors all operations of the unit.
The control system is composed of several components as
described in this manual. See Fig. 1-4 for typical control box
component arrangements. See Fig. 5-15 for typical power and
control wiring. Table 2 lists the drawings by unit size.
3
Table 1 — Unit Sizes
NOMINAL NOMINAL
CAPACITY CAPACITY
TONS kW
(60 Hz) (60 Hz)
24.0 84.3
24.0 84.3
26.6 93.4
26.6 93.4
31.1 109.2
31.1 109.2
39.8 139.8
39.2 137.7
48.1 168.9
50.0 175.6
58.3 204.7
59.6 209.6
67.3 236.4
78.0 273.9
87.4 306.9
96.0 337.2
110.4 388.3
125.1 442.3
. Names will also be shown in bold
and keys. The arrow symbol in the path name repre-
to move into the next level of the
ENTER
and
ENTER
ESCAPE

CONTROLS

The 38AP air-cooled condensing unit contains
NOMINAL NOMINAL
CAPACITY CAPACITY
TONS kW
(50 Hz) (50 Hz)
20.0 70.3
20.0 70.3
22.2 78.1
22.2 78.1
26.0 91.4
26.0 91.4
32.8 115.3
32.6 114.6
39.5 138.9
41.6 146.3
48.0 168.8
49.4 173.7
58.5 205.7
64.5 226.8
71.9 252.8
79.8 280.6
90.8 319.3
103.7 364.6
The follow-
OPT2 LLCS.
keys simultaneously
® ) point names are also