Carrier 542E User Manual
Page 12
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TABLE VII-MODEL 542D060 & 542E060-
3-PHASE UNITS-MOTOR PULLEY SETTINGS
FOR AIR DELIVERY AT INDICATED EXTERNAL
SP & VOLTAGE WITH WET COIL
NOTES:
542E060 STANDARD DRIVE RANGE
{ 208 Volts—Standard Motor Pulley & Belt |
Airflow
(Ft3/Min)
0.30
0.40
0.50
0.60
0.70
0.80
0.90
T.O.
T.O.
T.O.
T.O.
T.O.
T.O.
T.O.
1750
—
—
—
4-1/2
3-1/2
2-1/2
2
1875
—
—
5
4
3
2-1/2
1
2000
-
-
4-1/2
3-1/2
2-1/2
2
1/2
2125
—
5
4
3
2
1
—
2250
—
4-1/2
3-1/2
2-1/2
1-1/2
1/2
—
1 230 Volts—Standard Motor Pulley & Belt )
Airflow
(Ft3/Min)
0.40
0.45
0.50
0.55
0.60
0.65
0.70
T.O.
T.O.
T.O.
T.O.
T.O.
T.O.
T.O.
1750
—
—
—
5
4-1/2
4
3-1/2
1875
—
—
—
4-1/2
4
3-1/2
3
2000
—
5
4-1/2
4
3-1/2
3
3
2125
5
4-1/2
4
3-1/2
3-1/2
3
2-1/2
2250
4-1/2
4
4
3-1/2
3
2-1/2
2
1 460 Volts—Standard
Victor Pulley & Belt |
Airflow
(Ff3/Min)
0.30
0.40
0.50
0.60
0.70
0.80
0.90
T.O.
T.O.
T.O.
TO.
T.O.
T.O.
T.O.
1750
—
—
—
5
3-1/2
3
2
1875
—
—
—
4
3
2
1-1/2
2000
—
—
5
4
3
2
1
2125
—
—
4-1/2
3-1/2
2
1-1/2
1/2
2250
—
5
4
3
2
1
—
542E060 OPTIONAL DRIVE RANGE
1 208 Volts—Optional Motor Pulley & Belt {
Airflow
(Ff3/Min)
0.20
0.25
0.30
0.35
0.40
0.45
0.50
T.O.
T.O.
T.O.
T.O.
T.O.
T.O.
T.O.
1600
5
4
3
2-1/2
2
1-1/2
1
1650
4-1/2
3-1/2
3
2
1-1/2
1-1/2
1
1700
4
3
2-1/2
2
1-1/2
1
1/2
1750
3-1/2
3
2-1/2
2
1-1/2
1
1/2
1800
3-1/2
3
2
1-1/2
1
1/2
0
1 230
Volts—Optional Motor Pulley & Belt |
Airflow
(Ft3/Min)
0.20
0.25
0.30
0.35
0.40
0.45
0.50
T.O.
T.O.
T.O.
T.O.
T.O.
T.O.
T.O.
16ÜÖ
5
4
3
2-1/2
2
1-1/2
1
1650
4-1/2
3-1/2
3
2
2
1-1/2
1
1700
4
3
2-1/2
2
1-1/2
1
1/2
1750
4
3
2-1/2
2
1-1/2
1
1/2
1800
3-1/2
3
2
2
1
1
1/2
1 460
Volts—Optional Motor Pulley & Beit |
Airflow
(Ff3/Min)
0.20
0.25
0.30
0.35
0.40
0.45
0.50
T.O.
T.O.
T.O.
T.O.
T.O.
T.O.
T.O.
1600
4
3-1/2
3
2-1/2
2
1-1/2
1
1650
3
2-1/2
2
1-1/2
1
1/2
1700
3-1/2
3
2-1/2
2
1-1/2
1
1/2
1750
3-1/2
3
2-1/2
2
1
1
1/2
1800
3-1/2
2-1/2
2
1-1/2
1
1/2
0
542D060 STANDARD DRIVE RANGE
1
208 Volts-Standard Motor Pu
ley
&
Be ■t 1
Airflow
(Ff3/Min)
0.10
0.20
0.30
0.40
0.50
0.60
0.70
T.O.
T.O.
T.O.
T.O.
T.O.
T.O.
T.O.
1750
—
4
3-1/2
3
2
1-1/2
1
1875
5
3-1/2
3
2
1-1/2
1/2
0
2000
4
2-1/2
2
1
1
0
—
2125
2-1/2
2
1
1/2
0
—
—
2250
2
1
1/2
—
—
—
—
230 Volts—Standard Motor Pulley
&
Belt
|
Airflow
(Ff3/Min)
0.10
0.20
0.30
0.40
0,50
0.60
0.70
T.O.
T.O.
T.O.
T.O.
T.O.
T.O.
T.O.
1750
—
5
4
3
2-1/2
1-1/2
1
1875
5
4
3
2
1-1/2
1
0
2000
4
3
2
1-1/2
1
0
—
2125
3
2
1-1/2
1-1/2
0
—
—
2250
2
1
1/2
0
—
_
—
1 460 Volts—Standard Motor Pulley & Beit |
Airflow
(Ff3/Min)
0.10
0.20
0.30
0.40
0.50
0.60
0.70
T.O.
T.O.
T.O.
T.O.
T.O.
T.O.
T.O.
1750
—
5
4
3-1/2
2-1/2
1-1/2
1
1875
5
4-1/2
3-1/2
2-1/2
2
1
1/2
2000
4
3
2-1/2
1-1/2
1
1/2
_
2125
3
2
1-1/2
1
0
—
—
2250
2
1-1/2
1/2
0
—
—
-
1. Values shown for Model 542E'are without air filter.
Values shown for Model 542D are with faotory-sup-
plied 1-inch air filters. Use values shown for Model
542D when using the accessory field-installed down
flow plenium with Model 542E.
2.
T.O.
= Blower motor pulley turns open.
3. Dashes indicate portions of thè table that are beyond
the drive range.
4. Optional drive for Model 542E060: motor pulley P / N
50611B6 & belt P/N 94006
5. Motor pulley factory setting is two turns open.
7.
Outdoor Fan Thermostat—This control, which is
featured on all 3-phase units, maintains the proper
cooling mode condensing temperature by switching the
outdoor fan motor to high- or low-speed operation. Low-
speed fan operation permits low-ambient cooling opera
tion down to 40°F outdoor temperature.
VII. SEQUENCE OF OPERATION
Do not leave the installation until the heat pump has been
observed throughout one or two complete cycles. The
installer should make certain during this time that all com
ponents are operating in correct sequence.
The sequences of operation described in this section pertain
.to size 036, 042, and 048 208/230-volt, 3-phase units;
however, the sequence of operation of all units is very simi
lar. Refer to the line-to-line wiring diagram in Figure 13.
NOTE: Although the actual unit wiring may vary slightly
from that shown in Figure 13, the sequence of operation will
not be affected. The sequences of operation described in this
section pertain to a typical system using room thermostat
P/N 34427DP115 or P/N 34427DP118 for system control,
and using an accessory electric resistance heater for supple
mental heat.
NOTE; The indoor blower motor will operate continuously,
regardless of the room thermostat SYSTEM switch position,
when the FAN switch is in the ON position. The ON position
of the FAN switch keeps the circuit through blower relay
coil 2A closed and the coil energized. When the FAN switch
is in the AUTO position, the blower operates only when the
system is started by the room thermostat demand for heat
ing or cooling.
A. Crankcase Heater Operation
Compressor crankcase heater llA is connected across nor
mally open cmpressor contactor 2D contacts between 13 and
23. When electric power is supplied to the heat pump, and
the unit is not operating in either the heating or cooling
mode, a completed circuit between power legs LI and L3 per
mits current to flow through one leg of compressor motor 3F
windings and through crankcase heater 11 A. The high
electrical resistance of the crankcase heater causes the
heater to heat up, while the compressor motor windings
serve only as a means of completing the circuit between LI
and L3.
When the heat pump receives a “call” for either heating or
cooling, normally open compressor contactor 2D contacts
between 13 and 23 close. (See heating and cooling sequences
of operation in this section.) Electric current, which always
follows the path of least resistance, flows through the closed
contacts and through both compressor motor 3F and outdoor
fan motor 3D1. The crankcase heater, which offers a much
higher electrical resistance than the two motors, receives
virtually no electrical current as long as the contactor is
energized.
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1 2
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