09DK054-094 Accessory Control Transformer

09DK054-094
Accessory Control Transformer
Installation Instructions
Part no. 09DK900005
GENERAL
These instructions are for field installation of the accessory control transformer kit for 09DK054-094 units. The
control transformer is used to convert 208, 230, or 460 v to
115 v for use on 115 v condenser unit control systems. The
kit includes a transformer (Fig. 1) and fastener hardware for
installation. See Table 1 for kit contents.
Table 1 — Transformer Kit Contents
QUANTITY
1
4
1
ITEM
100 va Transformer
Pan Head Screw
(no. 10-16 x 1/2 in. long)
Green-Coated Grounding Screw
(Type AB no. 10-16 x 1⁄2 in. long)
INSTALLATION
ELECTRIC SHOCK HAZARD
Separate power sources (main and control circuits) are used for these units. Be sure both
circuits are disconnected before installing the
transformer.
Examine Package Contents — Check kit for shipping damage or missing parts. If damage is found, file a
claim with the shipping agency immediately. See Table 1
for kit contents; if any item is missing, notify your Carrier
representative.
To complete electrical connections:
1. Make electrical connections at the appropriate terminals
on the primary side of the transformer using 14 AWG size
wire. See Fig. 3 for transformer connection points.
2. Make primary side electrical connections at terminal
block 1. The factory recommends following the path of
the standard unit wiring harness when completing these
connections. Any 2 of the 3 connection points at terminal
block 1 can be used. See Fig. 4-8 for control transformer
wiring.
3. Make electrical connections on the secondary side of the
transformer. The proper connections on the secondary side
are based on the unit refrigerant coil circuiting applications. Refer to the appropriate control transformer wiring
(Fig. 4-8). Use 16 AWG (1.5 mm2) size wire. Refer to
indoor unit wiring diagram for outdoor-fan relay wiring
details.
NOTE: It is important to ground the secondary side. Connect a 16 AWG size wire from terminal X2 on the transformer to a hole in the control box, located above the
transformer, using the factory-supplied green coated grounding screw.
4. Check that all connections are correct and tight.
Complete Installation
1. Replace control box cover.
2. Close and secure control box door.
3. Restore power to the unit.
Mount Accessory Transformer in Control Box
1. Disconnect all power circuits.
2. Open control box door.
3. Remove and save 4 corner holddown screws from control box cover and detach cover.
4. Mount transformer in the control box using the 4 pan head
screws provided (Fig. 2).
Complete Electrical Connections — For electrical wiring connections, terminal block 1 uses three 3/16-in.
allen head 1/4-20 screws, and terminal blocks 2-7 use no. 8
screws. The transformer uses 1/4-in. double male quickconnect terminals with no. 8 screws.
All wires are field supplied. Wiring must be appliance
wiring material, rated 105 C or its equivalent. Wires must be
14 AWG (American Wire Gage) (2.5 mm2) on the primary
side and 16 AWG (1.5 mm2) on the secondary side. All wiring must comply with NEC (National Electrical Code) and
applicable local codes.
Fig. 1 — Accessory Transformer
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 2
PC 111
Catalog No. 530-960
Printed in U.S.A.
Form 09DK-10SI
Pg 1
5-94
Replaces: 09DK-7SI
Tab 4a
LEGEND
CR
DU
EQUIP
FC
FCPS
—
—
—
—
—
FM
GND
MMSN
NEC
PL
TB
TRAN
—
—
—
—
—
—
—
Control Relay
Dummy Terminal
Equipment
Fan Contactor
Fan Cycling Pressure
Switch
Fan Motor
Ground
Motormaster® III Sensor
National Electrical Code
Plug Assembly
Terminal Block
Transformer
Terminal Block Connection
Marked Terminal
Unmarked Terminal
Unmarked Splice
Factory Wiring
Field Wiring
Indicates common potential;
does not represent wiring
Fig. 2 — Typical Transformer Location in Control Box
(09DK054, 064 Unit Component Arrangement Shown)
2
LEGEND
Marked Terminal
Fig. 3 — Transformer Connection Points
3
LEGEND
OFR — Outdoor-Fan Relay
TB — Terminal Block
Terminal Block Connection
Marked Terminal
Field Wiring
NOTES:
1. See Fig. 3 for transformer connection points for each voltage.
2. Refer to indoor unit wiring diagram for details of OFR coil
connections.
3. Typical TB1 connection points shown; any 2 of the 3 points can
be used.
Fig. 4 — Control Transformer Wiring for 100% Refrigerant Coil Circuiting
4
LEGEND
OFR — Outdoor-Fan Relay
TB — Terminal Block
Terminal Block Connection
Marked Terminal
Field Wiring
NOTES:
1. See Fig. 3 for transformer connection points for each voltage.
2. Refer to indoor unit wiring diagram for details of OFR coil
connections.
3. Typical TB1 connection points shown; any 2 of the 3 points
on TB1 can be used.
Fig. 5 — Control Transformer Wiring for 50/50% Refrigerant Coil Circuiting
5
6
LEGEND
Field Wiring
Marked Terminal
NOTES:
1. See Fig. 3 for transformer connection points for each voltage.
2. Refer to indoor unit wiring diagram for details of OFR coil connections. Capacities shown are nominal and may differ slightly
according to unit size.
3. Follow path of standard unit wiring harness when wiring.
4. Typical TB1 connection points shown; any 2 of the 3 points can
be used.
Fig. 6 — Control Transformer Wiring for Nominal 67/33% Refrigerant Coil Circuiting (09DK054-084 Only)
Terminal Block Connection
OFR — Outdoor-Fan Relay
TB
— Terminal Block
7
Field Wiring
Marked Terminal
NOTES:
1. See Fig. 3 for transformer connection points for each voltage.
2. Refer to indoor unit wiring diagram for details of OFR coil connections.
Capacities shown are nominal and may differ slightly according to unit
size.
3. Follow path of standard unit wiring harness when wiring.
4. Typical TB1 connection points shown; any 2 of the 3 points can be used.
Fig. 7 — Control Transformer Wiring for Nominal 33/33/33% Refrigerant Coil Circuiting (09DK054-084 Only)
Terminal Block Connection
OFR — Outdoor-Fan Relay
TB
— Terminal Block
LEGEND
Copyright 1994 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 2
PC 111
Catalog No. 530-960
Printed in U.S.A.
Form 09DK-10SI
Pg 8
5-94
Replaces: 09DK-7SI
Tab 4a
Field Wiring
Marked Terminal
NOTES:
1. See Fig. 3 for transformer connection points for each voltage.
2. Refer to indoor unit wiring diagram for details of OFR coil connections.
Capacities shown are nominal and may differ slightly according to unit
size.
3. Follow path of standard unit wiring harness when wiring.
4. Typical TB1 connection points shown; any 2 of the 3 points can be used.
Fig. 8 — Control Transformer Wiring for Nominal 33/33/17/17% Refrigerant Coil Circuiting (09DK054-084 Only)
Terminal Block Connection
OFR — Outdoor-Fan Relay
TB
— Terminal Block
LEGEND