50TFQ004-012
Single Package Rooftop
Heat Pump Units
Wiring Diagrams
DIAGRAM INDEX
DIAGRAM INDEX
Unit 50TFQ
Voltage-Phase-Hertz
208/230-1-60
208/230-3-60
460-3-60
575-3-60
208/230-1-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
004,005
006
007
008-012
UNIT LABEL DIAGRAM
Type
Schematic/Component Arrangement
Schematic/Component Arrangement
Schematic/Component Arrangement
Schematic/Component Arrangement
Schematic/Component Arrangement
Schematic/Component Arrangement
Schematic/Component Arrangement
Schematic/Component Arrangement
Schematic/Component Arrangement
Schematic/Component Arrangement
Schematic/Component Arrangement
Schematic/Component Arrangement
Schematic/Component Arrangement
Schematic/Component Arrangement
Label Diagram
50DK508797
50DK508798
50DK508801
50DK508804
50DK508797
50DK508779
50DK508802
50DK508805
50DK508800
50DK508803
50DK508806
50DK508808
50DK508809
50DK508810
Figure No.
1
2
3
4
1
5
6
7
8
9
10
11
12
13
ELECTRIC HEATING
Unit
(Voltage-Phase)
208/230-1
230/230-3
Unit Size
Electric Heater
Label Diagram
Figure No.
004-006
004-007
008-012
ALL
ALL
18.0/24.0
7.8/10.4, 12.0/16.0
24.0/32.0, 31.8/42.4
37.6/50.0
ALL
13.9
16.5
27.8, 33.0, 41.7
50.0
17.0
34.0
51.0
3-05531
3-05607
3-05626
3-05623
3-05626
3-05626
3-05536
3-05624
3-05624
3-05625
3-05625
3-05624
3-05625
3-05625
14
15
16
17
008-012
012
004-007
008,009
460-3
009-012
012
575-3
008-012
012
Description
Motormaster® I Wiring Details
Motormaster II Control Wiring Schematic
Time Guard® II Device
Solid-State Enthalpy Control
Differential Enthalpy Control
Economi$er Wiring
Economi$er Sensor Wiring
Economi$er Power Exhaust Wiring
Enthalpy Control and
Durablade Control Board Wiring
ACCESSORY WIRING
Unit Size
004-012
004-007
008-012
004-012
004-012
004-012
004-007
004-012
004-012
004-012
16
18
19
20
19
20
Figure No.
21
22
23
24
25
26
27
28
29
30
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Catalog No. 535-00016
Printed in U.S.A.
Form 50TFQ-1W
Pg 1
2-01
Replaces: New
Book 1 4
Tab 5a 5a
LEGEND
AHA
AWG
C
CAP.
CB
CC
CH
COMP
D
DB
DFT
EC
ECON
EPS
—
—
—
—
—
—
—
—
—
—
—
—
—
—
EQUIP —
ER
—
FPT
—
FSS
—
FU
—
GND
—
HC
—
HP
—
HPS
—
HR
—
IFC
—
IFM
—
IFMOVL—
LPS
—
LSM
—
MCA —
MTR
—
OAT
—
OFC
—
OFM
—
OLR
—
Adjustable Heat Anticipator
American Wire Gage
Contactor, Compressor
Capacitor
Circuit Breaker
Cooling Capacitor
Crankcase Heater
Compressor Motor
Diode
Defrost Board
Defrost Thermostat
Enthalpy Control
Economizer
Emergency Power Supply
(Nine-Volt Battery)
Equipment
Economizer Relay
Freeze-Up Protection Thermostat
Filter Status Switch
Fuse
Ground
Heater Contactor (Strip Heat)
Heat Pump
High-Pressure Switch
Heater Relay
Indoor-Fan Contactor
Indoor-Fan Motor
Indoor-Fan Motor Overload
Low-Pressure Switch
Limit Switch (Manual Reset)
Minimum Circuit Amps
Motor
Outdoor-Air Thermostat
Outdoor-Fan Contactor
Outdoor-Fan Motor
Overload Relay
P
PL
QT
R
RVS
SAT
ST
SW1
SW2
SW3
SW4
TB
TC
TDR
TH
TRAN
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Plug
Plug Assembly
Quadruple Terminal
Relay
Reversing Valve Solenoid
Supply-Air Thermostat
Start Thermistor
Switch Fully Open
Switch Fully Closed
Switch Minimum Vent Position
Switch Maximum Vent Position
Terminal Block
Thermostat, Cooling
Time Delay Relay
Thermostat, Heating
Transformer
Field Splice
Marked Wire
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Splice (Marked)
Factory Wiring
Field Control Wiring
Field Power Wiring
Accessory or Optional Wiring
To indicate common potential only.
Not to represent wiring.
2
NOTES FOR FIG. 1
1. If any of the original wire furnished must be replaced, it must be
replaced with Type 90 C wire or its equivalent.
2. Thermostat:
HH07AT170, 172, 174, and P272-2783.
Subbase:
HH93AZ176, 178 and P272-1882, 1883.
3. Set heat anticipator at .8 amp for 1st stage and .3 amp for 2nd
stage.
4. Use copper conductors only.
5. Use copper, copper-clad aluminum or aluminum conductors.
6.
CB
MUST
VOLTAGE
TRIP
RATING
MFG. PT. NO.
AMPS
Potter & Brumfield
24 V
3.2
W2BX-1024-3.2
NOTES FOR FIG. 2, 8, 11, 12, 13
1. If any of the original wire furnished must be replaced, it must be
replaced with Type 90 C wire or its equivalent.
2. Three-phase motors are protected under primary single phasing conditions.
3. Thermostat:
HH07AT170, 172, 174, and P272-2783.
Subbase:
HH93AZ176, 178, and P272-1882, 1883.
4. Set heat anticipator at .8 amp for 1st stage and .3 amp for 2nd
stage.
5. Use copper conductors only.
6. Use copper, copper-clad aluminum or aluminum conductors.
7.
CB
VOLTAGE
MUST
RATING
MFG. PT. NO.
TRIP
AMPS
Potter & Brumfield
24 V
W2BX-1024-3.2
3.2
NOTES FOR FIG. 3, 4, 5, 6, 7, 9, 10
6.
1. If any of the original wire furnished must be replaced, it must be
replaced with Type 90 C wire or its equivalent.
2. Thermostat:
HH07AT170, 172, 174, and P272-2783
Subbase:
HH93AZ176, 178, and P272-1882, 1883.
3. Three-phase motors are protected under primary singlephasing conditions.
4. Set heat anticipator at .8 amp for 1st stage and .3 amp for 2nd
stage.
5. Use copper conductors only.
VOLTAGE
RATING
24 V
3
CB
MFG. PT. NO.
Potter & Brumfield
W2BX-1024-3.2
MUST
TRIP
AMPS
3.2
Fig. 1 — Schematic/Component Arrangement; 50TFQ004-006; 208/230-1-60
4
Fig. 1 — Schematic/Component Arrangement; 50TFQ004-006; 208/230-1-60 (cont)
5
Fig. 2 — Schematic/Component Arrangement; 50TFQ004,005; 208/230-3-60
6
Fig. 2 — Schematic/Component Arrangement; 50TFQ004,005; 208/230-3-60 (cont)
7
Fig. 3 — Schematic/Component Arrangement; 50TFQ004,005; 460-3-60
8
Fig. 3 — Schematic/Component Arrangement; 50TFQ004,005; 460-3-60 (cont)
9
Fig. 4 — Schematic/Component Arrangement; 50TFQ004,005; 575-3-60
10
Fig. 4 — Schematic/Component Arrangement; 50TFQ004,005; 575-3-60 (cont)
11
Fig. 5 — Schematic/Component Arrangement; 50TFQ006; 208/230-3-60
12
Fig. 5 — Schematic/Component Arrangement; 50TFQ006; 208/230-3-60 (cont)
13
Fig. 6 — Schematic/Component Arrangement; 50TFQ006; 460-3-60
14
Fig. 6 — Schematic/Component Arrangement; 50TFQ006; 460-3-60 (cont)
15
Fig. 7 — Schematic/Component Arrangement; 50TFQ006; 575-3-60
16
Fig. 7 — Schematic/Component Arrangement; 50TFQ006; 575-3-60 (cont)
17
Fig. 8 — Schematic/Component Arrangement; 50TFQ007; 208/230-3-60
18
Fig. 8 — Schematic/Component Arrangement; 50TFQ007; 208/230-3-60 (cont)
19
Fig. 9 — Schematic/Component Arrangement; 50TFQ007; 460-3-60
20
Fig. 9 — Schematic/Component Arrangement; 50TFQ007; 460-3-60 (cont)
21
Fig. 10 — Schematic/Component Arrangement; 50TFQ007; 575-3-60
22
Fig. 10 — Schematic/Component Arrangement; 50TFQ007; 575-3-60 (cont)
23
Fig. 11 — Schematic/Component Arrangement; 50TFQ008-012; 208/230-3-60
24
Fig. 11 — Schematic/Component Arrangement; 50TFQ008-012; 208/230-3-60 (cont)
25
Fig. 12 — Schematic/Component Arrangement; 50TFQ008-012; 460-3-60
26
Fig. 12 — Schematic/Component Arrangement; 50TFQ008-012; 460-3-60 (cont)
27
Fig. 13 — Schematic/Component Arrangement; 50TFQ008-012; 575-3-60
28
Fig. 13 — Schematic/Component Arrangement; 50TFQ008-012; 575-3-60 (cont)
29
Electric shock hazard — Disconnect all branch circuits before
removing this cover.
NOTES:
1. To be wired in accordance with NEC and local codes.
2. Brown and violet 24-vac wires are supplied with heater and connected at installation to base unit
as shown on base unit wiring diagram.
3. For single phase, disconnect YEL1 wire from terminal L1/11 and connect RED1 wire and splice
connector to loose terminal on YEL1 as shown above.
4. Power wires are supplied with heater and connected at installation to base unit field power connection box as shown on base unit wiring diagram. For field installation of electric heaters, field
power connection box shown on equipment nameplate must be used.
5. For single phase operation, disconnect YEL1 from L1/11 and splice to RED1 with a splice
connector.
LEGEND
Sylvania
Marked Terminal
Elmwood
HTR
HR
LS
NEC
SC
—
—
—
—
—
Unmarked Terminal
Heater
Heater Relay
Limit Switch
National Electrical Code
Splice Connector
Fig. 14 — Label Diagram, Accessory Electric Heater; 50TFQ004-006; 208/240 V, Single Phase
LEGEND
Electric shock hazard — Disconnect all branch circuits before
removing this cover.
NOTES:
1. To be wired in accordance with NEC and local codes.
2. Brown and violet 24-vac wires are supplied with heater and connected at installation to base unit
as shown on base unit wiring diagram.
3. Power wires are supplied with heater and connected at installation to base unit field power connection box as shown on base unit wiring diagram. For field installation of electric heaters, field
power connection box shown on equipment nameplate must be used.
Sylvania
Marked Terminal
Elmwood
HTR
HR
LS
NEC
—
—
—
—
Unmarked Terminal
Heater
Heater Relay
Limit Switch
National Electrical Code
Fig. 15 — Label Diagram, Accessory Electric Heater; 50TFQ004-007; 208/240 V, 3 Phase
30
LEGEND
Electric shock hazard — Disconnect all branch circuits before
removing this cover.
NOTES:
1. To be wired in accordance with NEC and local codes.
2. Brown and violet 24-vac wires are supplied with heater and connected at installation to base unit
as shown on base unit wiring diagram.
3. Power wires are supplied with heater and connected at installation to base unit field power connection box as shown on base unit wiring diagram. For field installation of electric heaters, field
power connection box shown on equipment nameplate must be used.
Sylvania
Marked Terminal
Elmwood
HTR
HR
LS
NEC
—
—
—
—
Unmarked Terminal
Heater
Heater Relay
Limit Switch
National Electrical Code
Fig. 16 — Label Diagram, Accessory Electric Heater; 50TFQ008-012;
18.0/24.0 kW, 24.0/32.0 kW, 31.8/42.4 kW, and 37.6/50.0 kW; 208/240 V, 3 Phase
LEGEND
Electric shock hazard — Disconnect all branch circuits before
removing this cover.
NOTES:
1. To be wired in accordance with NEC and local codes.
2. Brown and violet 24-vac wires are supplied with heater and connected at installation to base unit
as shown on base unit wiring diagram.
3. Power wires are supplied with heater and connected at installation to base unit field power connection box as shown on base unit wiring diagram. For field installation of electric heaters, field
power connection box shown on equipment nameplate must be used.
Sylvania
Marked Terminal
Elmwood
HTR
HR
LS
NEC
—
—
—
—
Fig. 17 — Label Diagram, Accessory Electric Heater; 50TFQ008-012;
7.8/10.4 kW, and 12.0/16.0 kW; 208/240 V, 3 Phase
31
Unmarked Terminal
Heater
Heater Relay
Limit Switch
National Electrical Code
LEGEND
Electric shock hazard — Disconnect all branch circuits before
removing this cover.
NOTES:
1. To be wired in accordance with NEC and local codes.
2. Brown and violet 24-vac wires are supplied with heater and connected at installation to base unit
as shown on base unit wiring diagram.
3. Power wires are supplied with heater and connected at installation to base unit field power connection box as shown on base unit wiring diagram. For field installation of electric heaters, field
power connection box shown on equipment nameplate must be used.
Sylvania
Marked Terminal
Elmwood
HTR
HR
LS
NEC
—
—
—
—
Unmarked Terminal
Heater
Heater Relay
Limit Switch
National Electrical Code
Fig. 18 — Label Diagram, Accessory Electric Heater; 50TFQ004-007; 480 V, 3 Phase
LEGEND
Electric shock hazard — Disconnect all branch circuits before
removing this cover.
NOTES:
1. To be wired in accordance with NEC and local codes.
2. Brown and violet 24-vac wires are supplied with heater and connected at installation to base unit
as shown on base unit wiring diagram.
3. Power wires are supplied with heater and connected at installation to base unit field power connection box as shown on base unit wiring diagram. For field installation of electric heaters, field
power connection box shown on equipment nameplate must be used.
Sylvania
Marked Terminal
Elmwood
HTR
HR
LS
NEC
—
—
—
—
Fig. 19 — Label Diagram, Accessory Electric Heater; 50TFQ008-012;
13.9 kW and 16.5 kW, 480 V; 17.0 kW, 575 V
32
Unmarked Terminal
Heater
Heater Relay
Limit Switch
National Electrical Code
LEGEND
Electric shock hazard — Disconnect all branch circuits before
removing this cover.
NOTES:
1. To be wired in accordance with NEC and local codes.
2. Brown and violet 24-vac wires are supplied with heater and connected at installation to base unit
as shown on base unit wiring diagram.
3. Power wires are supplied with heater and connected at installation to base unit field power connection box as shown on base unit wiring diagram. For field installation of electric heaters, field
power connection box shown on equipment nameplate must be used.
Sylvania
Marked Terminal
Elmwood
HTR
HR
LS
NEC
—
—
—
—
Unmarked Terminal
Heater
Heater Relay
Limit Switch
National Electrical Code
Fig. 20 — Label Diagram, Accessory Electric Heater; 50TFQ009-012;
27.8 kW, 33.0 kW, 41.7 kW, and 50.0 kW, 460 V; 34.0 kW and 51.0 kW, 575 V
33
50TFQ004-007
LEGEND
C — Contactor
50TFQ008-012
Fig. 21 — Motormaster® I Control Wiring Details
*
LEGEND
operating mode. In this alternate mode, the outdoor fan begins
cycling at higher outdoor ambient temperatures. This mode should
only be used if the evaporator coil shows signs of frosting at low outdoor ambient temperatures. To select the alternate operating mode,
move the jumper wire on the Motormaster II control board from terminal T1 to terminal T2.
NOTE: Motormaster II transformer is wired for 460-v supply; it must be
rewired for 208/230-v application. Be sure to insulate unused tap.
Refer to color code.
C
— Contactor
OFC — Outdoor-Fan
TRAN — Transformer
*The Motormaster II head pressure controller is equipped with an
alternate operating mode. When this mode is selected, the controller
shifts the fan cycle sequence to effectively raise the average condensing temperature approximately 20 F higher than the standard
Fig. 22 — Motormaster II Control Wiring Schematic, 50TFQ004-007
34
*
LEGEND
C
— Contactor
OFC — Outdoor-Fan
TRAN — Transformer
*The Motormaster® II head pressure controller is equipped
with an alternate operating mode. When this mode is
selected, the controller shifts the fan cycle sequence to
effectively raise the average condensing temperature
approximately 20 F higher than the standard operating
mode. In this alternate mode, the outdoor fan begins
cycling at higher outdoor ambient temperatures. This
mode should only be used if the evaporator coil shows
signs of frosting at low outdoor ambient temperatures. To
select the alternate operating mode, move the jumper wire
on the Motormaster II control board from terminal T1 to
terminal T2.
NOTE: Motormaster II transformer is wired for 460-v supply;
it must be rewired for 208/230-v application. Be sure to
insulate unused tap. Refer to color code.
Fig. 23 — Motormaster II Control Wiring Schematic, 50TFQ008-012
BRN
TIME GUARD I I DEVICE
BRN
T1
T3
2
T2
1
3
CLO
COMPRESSOR
SAFETIES
HIGH EFFICIENCY
BRN
TIME GUARD I I DEVICE
T1
T3
T2
C
OR
CR
LEGEND
C
— Contactor
CLO — Compressor Lockout
CR
— Control Relay
STANDARD EFFICIENCY
Fig. 24 — Time Guard® II Device, 50TFQ004-012
35
C
OR
CR
24 VAC SUPPLY FROM
A
B
TR
TR1
C SO
D
+
SR
+
2
3
CONTROL
} ECONOMIZER
SECTION (RED TO TR,
BRN TO TR1)
SENSOR MOUNTED
} TO
ON BACK OF CONTROL
A
620 ohm
JUMPER
B
TR
C
D SO
TR1
SR
+
GRAY WIRE FROM
ECONOMIZER HARNESS
2
TO SENSOR MOUNTED
ON BACK OF CONTROL
S (HH57AC078
+ SENSOR)
3
1
1
LED
+
24 VAC SUPPLY FROM
ECONOMIZER CONTROL
SECTION (RED TO TR,
BRN TO TR1)
GRAY WIRE FROM
ECONOMIZER HARNESS
LED
RED WIRE FROM
ECONOMIZER SWITCH 3
(NORMALLY CLOSED)
RED WIRE FROM
ECONOMIZER SWITCH 3
(NORMALLY CLOSED)
NOTE: Switches shown in high enthalpy state. Terminals 2 and 3
close on enthalpy decrease.
NOTES:
1. Remove factory-installed jumper across SR and + before connecting wires from HH57AC078 sensor.
2. Switches shown in high outdoor-air enthalpy state. Terminals 2
and 3 close on low outdoor air enthalpy relative to indoor air
enthalpy.
Fig. 25 — Wiring Connections for Solid-State
Enthalpy Control (HH57AC077)
Fig. 26 — Wiring Connections for Differential
Enthalpy Control (HH57AC077 and HH57AC078)
LEGEND
OAT — Outdoor-Air Thermostat
Fig. 27 — EconoMi$er Wiring
36
ECONOMI$ER
CONTROLLER
BROWN
VIOLET
OAT
WHITE
RED
COM
OAH
-15 V
BROWN
RAT
VIOLET
WHITE
COM
RAH
RED
+15 V
TEMP
TEMP
COM
OUT
PWR
OUTDOOR
AIR
SENSOR
TEMP
TEMP
COM
OUT
PWR
RETURN
AIR
SENSOR
CO2 SENSOR
24
V+
COM VAC
CO2 (+)
CO2 COM
DAT
COM
REM POT
COM
LED
COM
SUPPLY AIR
TEMPERATURE SENSOR
PINK
TEMP
VIOLET
TEMP
Fig. 28 — EconoMi$er Sensor Wiring, 50TFQ004-012
RED
GRAY
H1
H2
X4
X2 X3
RED YEL BLU GRAY
HT01AH850
(460 VAC)
HT01AH859
(575 VAC)
TO FUSED
DISCONNECT
X1
H1
H3 H2
H4
X4
X2 X3
X1
SECONDARY
230VAC
SECONDARY
230VAC
FIELD SUPPLIED
WIRING
BLACK
OR
BLACK
COMPRESSOR 1
CONTACTOR
11
LT. BLUE
21
230VAC
13
BROWN
23
FAN 1
GREEN/
YELLOW
2 x 4 IN.
HANDY BOX
BLACK L1
1
BLUE
L2 2
GREEN GND
3
4
9
2
5
8
1
4
7
B
R1
24 VAC
3-PIN
CONNECTOR
PLUG
A
BLUE
L1
1
L2
2
GND
3
4
230 VAC
1 PHASE
6
BLACK
C1
4-PIN
CONNECTOR
PLUG
3
ORANGE
1
YELLOW
2
BROWN
BLACK
BLACK
BLUE
LT. BLUE
GREEN
BROWN
FAN 2
C1
GREEN/
YELLOW
3
6
9
2
5
8
4
7
1
BLUE
Fig. 29 — Wiring Diagram for EconoMi$er Power Exhaust Systems
37
B
BLACK
R2
24 VAC
A
3
EC
MTR
OAT
SW1
SW2
SW3
SW4
—
—
—
—
—
—
—
LEGEND
Enthalpy Control
Motor
Outdoor-Air Thermostat
Switch Fully Open
Switch Fully Closed
Switch Minimum Vent Position
Switch Maximum Vent Position
Fig. 30 — Enthalpy Control and Durablade Economizer Control Board Wiring
38
Copyright 2001 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Catalog No. 535-00016
Printed in U.S.A.
Form 50TFQ-1W
Pg 40
2-01
Replaces: New
Book 1 4
Tab 5a 5a