Carrier 48TF004-014 Manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111 Catalog No. 534-80110 Printed in U.S.A. Form 48T-1W Pg 1 7-03 Replaces: 48TF-1W
Book 1 4
Ta b 1 a 6 a
Wiring Diagrams
DIAGRAM INDEX
*Low NOx/California compliant units.
OPTION AND ACCESSORY WIRING
*Durablade Economizer was a factory-installed option (FIOP) until 2/15/02, it is currently available only as a field-installed accessory.
†EconoMi$er wiring in Fig. 25 is generic (for units produced from 5/99 – 2/02) with the exception of the way the power exhaust switch is wired.
Refer to Fig. 28 and 29 for more detailed power exhaust switch information.
**Can be factory-installed or field-installed; wiring is the same for both.
UNIT LABEL DIAGRAM
Unit 48TF,TM Voltage-Phase-Hertz Type Label Diagram Figure No.
004,005
208/230-1-60 Schematic/Component Arrangement 50DK508460 1
208/230-3-60 Schematic/Component Arrangement 50DK508515 2
460-3-60 Schematic/Component Arrangement 50DK508518 3
575-3-60 Schematic/Component Arrangement 50DK508522 4
208/230-3-60* Schematic/Component Arrangement 50DK509082 5
460-3-60* Schematic/Component Arrangement 50DK509084 6
006
208/230-1-60 Schematic/Component Arrangement 50DK508514 7
208/230-3-60 Schematic/Component Arrangement 50DK508516 8
460-3-60 Schematic/Component Arrangement 50DK508519 9
575-3-60 Schematic/Component Arrangement 50DK508522 4
208/230-3-60* Schematic/Component Arrangement 50DK509083 10
460-3-60* Schematic/Component Arrangement 50DK509085 11
007
208/230-3-60 Schematic/Component Arrangement 50DK508517 12
460-3-60 Schematic/Component Arrangement 50DK508520 13
575-3-60 Schematic/Component Arrangement 50DK508523 14
008-014
208/230-3-60 Schematic/Component Arrangement 50DK508790 15
460-3-60 Schematic/Component Arrangement 50DK508791 16
575-3-60 Schematic/Component Arrangement 50DK508792 17
DESCRIPTION 48TF,TM UNIT SIZE FIG NO. BASE UNIT SERIAL NUMBER FOR
FACTORY-INSTALLED OPTIONS
Apollo Controls Wiring Including Indoor Air Quality 004-014 18 From 2492Gxxxxx
Apollo Thermostat Wiring – Typical 004-007 19 From 0395Gxxxxx
008-014 20
Convenience Outlet Schematic 004-014 21 From 0798Gxxxxx
Durablade Economizer Wiring 004-014 22 From 3295Gxxxxx*
Differential Enthalpy Control (Durablade) 004-014 23 From 3295Gxxxxx*
Solid-State Enthalpy Control (Durablade) 004-014 24 From 3295Gxxxxx*
EconoMi$er Wiring 004-014 25 2099Gxxxxx — 0702Gxxxxx†**
EconoMi$er Dry Bulb Sensor Wiring 004-014 26 2099Gxxxxx — 0702Gxxxxx
EconoMi$er Enthalpy Sensor Wiring 004-014 27 2099Gxxxxx — 0702Gxxxxx
EconoMi$er Power Exhaust Wiring with the Switch in the Actuator 004-014 28 2099Gxxxxx — 4501Gxxxxx
EconoMi$er Power Exhaust Wiring with the Switch Outside the Actuator 004-014 29 4501Gxxxxx — 0702Gxxxxx
EconoMi$er2 Wiring 004-014 30 From 0802Gxxxxx**
Differential Enthalpy Wiring (EconoMi$er2) 004-014 31 From 0802Gxxxxx
Fire and Smoke Control Wiring (EconoMi$er2) 004-014 32 From 0802Gxxxxx
Indoor Air Quality Sensor Wiring (EconoMi$er2) 004-014 33 From 0802Gxxxxx
Power Exhaust, 208/230, 575 V Units (Economi$er2) 004-014 34 From 0802Gxxxxx
Power Exhaust for 460 V Units (Economi$er2) 004-014 35 From 0802Gxxxxx
Economi$er2 with PremierLink™ or 4-20 mA Control 004-014 36 From 0802Gxxxxx
Factory-Installed Non-fused Disconnect 004-014 37 From 0395Gxxxxx
Motormaster® I Control Wiring Details 004-014 38 Accessory Only
Motormaster II Control Wiring Schematic 004-007 39
008-014 40
Motormaster IV Control Wiring Schematic 004-007 41
008-014 42
Novar Controls Wiring (EMT3051) 004-014 43 From 2900Gxxxxx
Novar Controls Wiring (EMT2024) 004-014 44 From 2900Gxxxxx
PremierLink Controls Wiring 004-014 45 From 4601Gxxxxx**
PremierLink Controls Wiring with Dual Terminal Block 004-014 46 From 4002Gxxxxx**
PremierLink Controls Wiring with Dual Terminal Block and 62AQ Energy$Recycler 004-014 47 From 2102Gxxxxx**
Smoke Detector Shutdown — Single-Phase 004-014 48 From 0802Gxxxxx
Smoke Detector Shutdown — Three-Phase 004-014 49 From 0802Gxxxxx
Time Guard II Device 004-014 50 Accessory Only
Two-Position Damper Wiring 004-014 51
Field-Installed 62AQ Energy$Recycler Accessory Wiring (Typical) 004-014 52
48TF,TM004-014
3 to 121/2Tons
Gas Heating/Electric Cooling Units

2
SEQUENCE OF OPERATION
Cooling, Units Without Economizer — When ther-
mostat calls for cooling, terminals G and Y1 are energized. The
indoor (evaporator) fan contactor (IFC) and compressor
contactor no. 1 (C1) are energized, and evaporator-fan motor
(IFM), compressor no. 1, and condenser fan(s) start. On
2-compressor units, outdoor-fan contactor (OFC) is energized
staring both outdoor fans. The fans continue to run until Y1 is
satisfied. The condenser-fan motor(s) runs continuously while
unit is cooling. For units with 2 stages of cooling, if the
thermostat calls for a second stage of cooling by energizing Y2,
compressor contactor no. 2 (C2) is energized and compressor
no. 2 starts.
Heating, Units Without Economizer — When the
thermostat calls for heating, terminal W1 is energized. In order
to prevent thermostat short-cycling, the unit is locked into the
Heating mode for at least 1 minute when W1 is energized. The
induced-draft motor (IDM) is then energized 20 seconds before
the burner ignition sequence begins. The indoor (evaporator)
fan motor (IFM) is energized 45 seconds after a flame is
proven. On units equipped for two stages of heat, when
additional heat is needed, W2 is energized and the high-fire
solenoid on the main gas valve (MGV) is energized. When the
thermostat is satisfied and W1 is deenergized, the IFM stops
after a 45-second time-off delay.
Cooling, Units With Durablade Economizer —
When the outdoor-air temperature is above the OAT (outdoor-
air thermostat) setting and the room thermostat calls for
cooling, compressor contactor no. 1 is energized to start
compressor no. 1 and the outdoor (condenser) fan motor
(OFM). The indoor (evaporator) fan motor (IFM) is energized
and the economizer damper moves to the minimum position.
Upon a further call for cooling, compressor contactor no. 2 will
be energized, starting compressor no. 2 (sizes 008-014 only).
On 2-compressor units, outdoor-fan contactor (OFC) is ener-
gized staring both outdoor fans. The fans continue to run until
Y1 is satisfied. After the thermostat is satisfied, the damper
moves to the fully closed position when using an auto fan or to
the minimum position when using a continuous fan.
When the outdoor-air temperature is below the OAT setting
and the thermostat calls for cooling, the economizer dampers
move to the minimum position. If the supply-air temperature is
above 57 F, the damper continues to open until it reaches the
fully open position or until the supply-air temperature drops
below 52 F.
When the supply-air temperature falls to between 57 F and
52 F, the damper will remain at an intermediate open position.
If the supply-air temperature falls below 52 F, the damper will
modulate closed until it reaches the minimum position or until
the supply-air temperature is above 52 F. When the thermostat
is satisfied and the indoor-fan motor is still in operation, the
damper will move to the minimum open setting. If the thermo-
stat is satisfied and the indoor-fan motor is deenergized, the
damper will move to the fully closed position.
If the outdoor air alone cannot satisfy the cooling require-
ments of the conditioned space, economizer cooling is integrated
with mechanical cooling, providing second-stage cooling.
Compressor no. 1 and the condenser fan will be energized and
the position of the economizer damper will be determined by the
supply-air temperature. Compressor no. 2 is locked out.
When the second stage of cooling is satisfied, the compres-
sor and OFM will be deenergized. The damper position will be
determined by the supply-air temperature.
After a 30-second delay, the IFM shuts off. If the thermostat
fan selector switch is in the ON position, the IFM will run
continuously.
Cooling, Units With EconoMi$er2 — When free
cooling is not available, the compressors will be controlled by
the zone thermostat. When free cooling is available, the
outdoor-air damper is positioned through the use of a
Proportional-Integral (PI) control process to provide a 55 F
supply-air temperature into the zone. If the mixed-air tempera-
ture is below the lower end of the set point of 50 F, then the
outside-air dampers will modulate to minimum position. If the
measured temperature is within the range of 50 to 56 F, then the
outside dampers will hold their current position. If the mixed
air temperature is above 56 F, then the outside-air dampers will
modulate open until the temperature is within range or they
modulate to the fully open position.
If outdoor air alone cannot satisfy the cooling requirements
of the conditioned space, and the OAT is above the outdoor air
mechanical lockout temperature set point (fixed; opens at 35 F,
closes at 50 F), the EconoMi$er2 integrates free cooling with
mechanical cooling as follows:
Y1 = 1st stage cooling using EconoMi$er2 damper for free
cooling
Y2 = 1st stage cooling using EconoMi$er2 damper for free
cooling plus compressor no. 1
NOTE: During EconoMi$er operation (damper above minimum
position) compressor no. 2 will not operate (sizes 008-014).
High ambient temperature (dry bulb) lockout (fixed): opens
at 76 F, closes at 52 F.
If the enthalpy of the outside air is too high, the outside-air
dampers will modulate to minimum position.
If mechanical cooling is utilized with free cooling, the
outdoor-air damper will be locked into its current position at
the time the compressor is started. If the increase in cooling
capacity causes the supply-air temperature to drop below 45 F,
then the outdoor-air damper position will be decreased to the
minimum position. If the supply temperature continues to fall,
the outdoor-air damper will close.
If optional power exhaust is installed, as the outdoor-air
damper opens and closes, the power exhaust fans will be
energized and deenergized.
If field-installed accessory CO2sensors are connected to the
EconoMi$er2 control, a PI-controlled demand ventilation
strategy will begin to operate. As the CO2level in the zone
increases above the CO2set point, the minimum position of the
damper will be increased proportionally. As the CO2level
decreases because of the increase in fresh air, the outdoor-air
damper will be proportionally closed.
Heating, Units With Economizer — When the ther-
mostat calls for heating, terminal W1 is energized. In order to
prevent thermostat short-cycling, the unit is locked into the
Heating mode for at least 1 minute when W1 is energized. The
induced-draft motor is then energized and the burner ignition
sequence begins. The indoor (evaporator) fan motor (IFM) is
energized 45 seconds after a flame is ignited and the damper
moves to the minimum position. On units equipped for two
stages of heat, when additional heat is needed, W2 is energized
and the high-fire solenoid on the main gas valve (MGV) is
energized. When the thermostat is satisfied and W1 is deener-
gized, the IFM stops after a 45-second time-off delay. The
economizer damper then moves to the fully closed position.
When using continuous fan, the damper will remain in the
minimum position.

3
LEGEND
NOTES FOR FIG. 1, 7
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 .14 amp for units with 2 stages of heating.
Set stage two anticipator at .14 amps.
4. Use copper conductors only.
5. TRAN is wired for 230-v unit. If unit is to be run with 208-v power
supply, disconnect BLK wire from 230-v tap and connect to 208-v
tap (RED). Insulate end of 230-v tap (ORN).
NOTES FOR FIG. 2, 5, 8, 10, 12, 15
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 .14 amp for units with 2 stages of heating.
Set stage two anticipator at .14 amps.
5. Use copper conductors only.
6. TRAN is wired for 230-v unit. If unit is to be run with 208-v power
supply, disconnect BLK wire from 230-v tap (ORN) and connect
to 208-v (RED). Insulate end of 230-v tap.
NOTES FOR FIG. 3, 4, 6, 9, 11, 13, 14, 16, 17
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 .14 amp for units with 2 stages of heating.
Set stage two anticipator at .14 amps.
5. Use copper conductors only.
AHA — Adjustable Heat Anticipator
C—
Contactor, Compressor
CAP. — Capacitor
CB — Circuit Breaker
CC — Cooling Compensator
COMP — Compressor Motor
D—
Diode
DAT — Discharge Air Thermistor
DX — Direct Expansion
EC — Enthalpy Control
ECON — Economizer
EPS — Emergency Power Supply
(Nine-Volt Battery)
EQUIP — Equipment
ER — Economizer Relay
FPT — Freeze-Up Protection Thermostat
GND — Ground
HPS — High-Pressure Switch
HS — Hall Effect Sensor
I—
Ignitor
IAQ — Indoor Air Quality
IDM — Induced-Draft Motor
IFC — Indoor-Fan Contactor
IFM — Indoor-Fan Motor
IFMOVL — Indoor-Fan Motor Overload
IGC — Integrated Gas Unit Controller
LED — Light-Emitting Diode
LPS — Low-Pressure Switch
LS — Limit Switch
MGV — Main Gas Valve
MTR — Motor
OAT — Outdoor-Air Thermostat
OFC — Outdoor-Fan Contactor
OFM — Outdoor-Fan Motor
OLR — Overload Relay
P—
Plug
PL — Plug Assembly
QT — Quadruple Terminal
R—
Relay
RS — Rollout Switch
SAT — Supply-Air Thermostat
SEN — Sensor
ST — Start Thermistor
SW1 — Switch Fully Open
SW2 — Switch Fully Closed
SW3 — Switch Minimum Vent Position
SW4 — Switch Maximum Vent Position
TC — Thermostat, Cooling
TDR — Time-Delay Relay
TH — Thermostat, Heating
TRAN — Transformer
VVT — Variable Volume/Variable Temperature
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.
Ground
|( Capacitor

4
Fig. 1 — Schematic/Component Arrangement; 48TF,TM004,005; 208/230-1-60

5
Fig. 2 — Schematic/Component Arrangement; 48TF,TM004,005; 208/230-3-60

6
Fig. 3 — Schematic/Component Arrangement; 48TF,TM004,005; 460-3-60

7
Fig. 4 — Schematic/Component Arrangement; 48TF,TM004-006; 575-3-60

8
Fig. 5 — Schematic/Component Arrangement; Low NOx 48TF,TM004,005;
California Compliant 48TF,TM004,005; 208/230-3-60

9
Fig. 6 — Schematic/Component Arrangement; Low NOx 48TF,TM004,005;
California Compliant 48TF,TM004,005; 460-3-60

10
Fig. 7 — Schematic/Component Arrangement; 48TF,TM006; 208/230-1-60

11
Fig. 8 — Schematic/Component Arrangement; 48TF,TM006; 208/230-3-60

12
Fig. 9 — Schematic/Component Arrangement; 48TF,TM006; 460-3-60

13
Fig. 10 — Schematic/Component Arrangement; Low NOx 48TF,TM006;
California Compliant 48TF,TM006; 208/230-3-60

14
Fig. 11 — Schematic/Component Arrangement; Low NOx 48TF,TM006;
California Compliant 48TF,TM006; 460-3-60

15
Fig. 12 — Schematic/Component Arrangement; 48TF,TM007; 208/230-3-60

16
Fig. 13 — Schematic/Component Arrangement; 48TF,TM007; 460-3-60

17
Fig. 14 — Schematic/Component Arrangement; 48TF,TM007; 575-3-60

18
Fig. 15 — Schematic/Component Arrangement; 48TF,TM008-014; 208/230-3-60

19
Fig. 16 — Schematic/Component Arrangement; 48TF,TM008-014; 460-3-60

20
Fig. 17 — Schematic/Component Arrangement; 48TF,TM008-014; 575-3-60