Carrier 09DK020-044 User Manual
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Air-Cooled Condenser Units
Motormaster® Low Ambient Controls
Wiring Diagrams
50/60 Hz
WIRING DIAGRAM INDEX
Fig. No.
Standard Unit Control Schematic 09DK . . . . . . . . . . . . . . . . . 3
®
Motormaster
Motormaster, 09DK 460 v, 575 v (60 Hz) . . . . . . . . . . . . . . . . 5
Fan Cycling Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
, 09DK 208/230 (60 Hz) . . . . . . . . . . . . . . . . . . 4
LEGEND
(For All Figures)
09DK020-044
ATS —
EQUIP —
FC —
FM —
GND —
TB —
Air Temperature Switch Terminal Block Connection
uipment Marked Terminal
E
Fan Contactor Unmarked Terminal
Fan Motor Factor
Ground Field Control Wirin
Terminal Block Connection Field Power Wirin
NOTES (Figs. 3-5)
1. For field power connections, splice field wires to (3)
leads from contactor number 1 (FC1).
.
2.
Control Circuit
Wiring
220 v 380 v, 60 Hz
230 v
115 v
Use 14 AWG copper conductors only for
control circuit wiring.
Power Supply
Wiring
230 v, 50 Hz
400 v, 50 Hz
208/230 v, 60 Hz
460 v, 60 Hz
575 v, 60 Hz
Wirin
3. Fan motors are terminally protected. Thre e-phase motors
are protected against primary single-phasing conditions.
4. Replacement of original wire s must be with type 90 C
wire or its equivalent.
5. Factory wiring is in accordanc e with National Electrical
(NEC). Field modifications or additions must be in compliance with all applicable codes.
6. Wiring for field power supply must be rated 60 C. Use
copper, copper-clad aluminum or aluminum conductors.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 2
Ta b 4 a
PC 111 Catalog No. 530-913 Printed in U.S.A. Form 09DK-4W Pg 1 4-00 Replaces: 09DK-1W
SAFETY CONSIDERATIONS
Fig. 1 — Fan Motor Locations
Installing, starting up, and servicing air conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location.
Only trained, qualified installers and service mechanics
should install, start up, and service this equipment. When
working on the equipment, observe precautions in the literature
and on tags, stickers, and labels attached to the equipment. Follow all safety codes. Wear safety glasses and work gloves.
ELECTRIC SHOCK HAZARD
Open all remote disconnects before servicing
this equipment.
MOTORMASTER® LOW AMBIENT CONTROL
NOTE: Installation of Motormaster Low Ambient Control
requires use of fan cycling control accessory, see page 7.
Introduction
There are two accessory packages as follows:
2. Remove FM1 (fan motor no. 1) fan guard (see Fig. 1)
located next to control box end.
3. Disconnect FM1 wiring in the motor junction box and remove FM1 from unit.
4. Remove fan propeller from FM1 and save. Fan propeller
is reinstalled on the speed control motor in a later step.
5. Place motor mount spacer in place over FM1 motor
mount.
6. Install speed control motor with rainshield (included in
package) in place of FM1.
PACKAGE NO.
50DJ-902---801
50DJ-902---811
*For Motormaster head pressure control operation, 575-v unit
requires installation of transformer (Carrier Part No. HT01AH854)
not included in package.
UNIT
Volt s-Ph-H z
208/230-3-60
575-3-60*
460-3-60 200/230-1-60
MOTOR
Volt s-Ph-H z
200/230-1-60
Each accessory package contains the parts listed in Table 1.
Note that these installation instructions are for 60 Hz units,
but installation procedures for 50 Hz units are similar. See
price pages for required parts for 50 Hz Motormaster applications. Contact Application Engineering if installation assistance is required.
Table 1 — Package Contents
PACKAGE
NOS. 50DJ-902---801 50DJ-902---811
Quantity
1
1
1
1
1
1
1
1
Speed Control Motor Speed Control Motor
Motor Mount Spacer Motor Mount Spacer
Capacitor Capacitor
Capacitor Boot Capacitor Boot
Motormaster Controller Motormaster Controller
Fastener Package Fastener Package
Instruction Booklet Instruction Booklet
—Transformer
Installation
1. Disconnect all power to the unit and open control box.
To avoid possible electrical shock and personal injury, all
power to unit must be disconnected before working on
unit. T ag all disconnects to alert others unit is being worked
on.
7. Because the standard fan motor is 3-phase, and the speed
control motor is single-phase, it is necessary to add a capacitor. Install the capacitor on the divider panel above
the condenser coil.
8. Mount the capacitor upside down (terminals pointing
down) using capacitor strap and screws (holes must be
field drilled). See Fig. 2. To prevent capacitor from slipping down, insert an additional screw through the panel
for the capacitor to rest on.
9. Disconnect black wire connecting FM1 junction box to
TB1 terminal 2 (575-v only). See Fig. 3. Disconnect yellow wire from FC1 terminal 12. Disconnect blue wire
from FC1 terminal 13.
10. Connect yellow wire from capacitor to the red wire (T8)
in the speed control motor junction box. Use wire nut to
connect. See Fig. 4. Connect blue wire from other side of
capacitor to the yellow wire (T4) in the speed control motor junction box. Use wire nut to connect.
11. From the same terminal on the capacitor as blue wire connection, run a field-supplied wire to FC1 terminal 12. Tie
the blue (T1) and black (T5) wires in the motor junction
box together, using a wire nut.
12. Remove the black jumper connecting TB1 to TB1
1 2
in the control box.
13. Mount the Motormaster
®
controller vertically on the divider panel next to the capacitor. See Fig. 2. It must be
mounted vertically with the leads coming out the bottom.
Using the template at the back of these instructions, drill
the required 4 mounting holes. Use 4 no. 10 sheet metal
screws and star washers provided to attach the controller.
The star washers must be used to ensure electrical
ground.
2
OTES:
1. Transformer shield and 575-v transformer are field supplied
(transformer part no. HT01AH854).
2. Exact mounting locations on divider panel for capacitor, Motormaster controller, and transformer are at discretion of installer.
There are no wires or obstructions on reverse side of divider
panel to interfere with mounting screws.
Fig. 2 — Mounting Motormaster® Controller,
Capacitor, and 575-V or 460-V Transformer
16. For 460-v and 575-v units only, mount and wire
transformer (460-v — P/N HT01AH852, 575-v —
P/N HT01AH854) as follows:
a. Mount tran sformer to the di vider panel . See Fi g. 2.
Drill required mounting holes.
b. Connect field-supplied wire from FC1 terminal 21
to the primary side of the transformer. See Fig. 5.
Connect a field-supplied wire from FC1
terminal 22 to the other primary of the transformer.
c. Run field-supplied wire from the secondary of the
transformer to the capacitor. Run field-supplied
wire from the other secondary of the transformer
to one of the black wires on the controller. See
Fig. 5.
d. Install field-supplied shield o ver the transformer.
See Fig. 2.
17. Reinstall the fan propeller and fan guard. Ensure that center of propeller is correct distance from top of fan orifice.
See Fig. 5.
18. Route the sensor wire from the controller to the sensor
location. Secure sensor wire to avoid contact with condenser coil.
14. For 208/230-v only:
Connect a field-supplied wire from TB1 terminal 1 to one
of the black wires in the Motormaster controller. Use wire
nut to connect. See Fig. 4.
15. Take the black wire that was disconnected in Step 3 and
connect it to the purple wire (P1) in the speed control motor junction box. Use wire nut to connect. Replace junction box cover.
Be sure the wires running to the speed control motor are
wire-tied securely to the motor mount, to prevent the wires
from becoming entangled in the propeller fan whe n unit is
running.
The sensor assembly is fragile. Handle with care.
19. For 09DK020-034 units, secure the sensor to the coil return bend. For 09DK044, secure the sensor to crossover
tube. See Fig. 7 for proper location for each unit. Use
no. 4-40 screw, two plate washers, and nut provided. See
Fig. 8.
20. Coil up excess wire and secure it to controller.
21. Protect sensor wire from physical damage by installing
field-supplied protective material.
22. Replace control box cover.
Winter Start Control —
These compressorless condenser sections do not need to be directly modified. However,
the total system may require winter start control. Refer to base
unit instructions.
3
Fig. 3 — Standard Unit Power and Control Schematic, 09DK
Fig. 4 — Motormaster
®
Controller Wiring; 09DK 208/230-Volt Units
4
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