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b. Evaporator Section. The evaporator section
contains the evaporator coil, fan motor and fan,
control module and junction box, air filter, heating
elements and thermal expansion valve.
When
cooling, air in the evaporator section is forced over
the evaporator coil by the evaporator fan which
lowers the temperature of the air before it is
distributed into the space to be conditioned. When
heating, air is circulated over the heating elements
and distributed by the evaporator fan. Evaporator
fan speed is controlled by a selector switch located
on control module.
c. Condenser Section. The condenser section
contains the hermetically sealed motor compressor,
condenser coil, condenser fan and motor, service
valves, filter dryer, equalize solenoid valve, liquid
line solenoid valve, liquid quench valve, pressure
regulator valves, electrical power connectors, and
the necessary refrigerant. The compressor
mechanically compresses refrigerant vapor to a
condensing condition and discharges it into the
condenser coil through the hot gas line. Outside air,
drawn over the condenser coil surface by the
condenser fan, condenses the refrigerant vapor to a
liquid. The liquid then leaves the condensing coil
and returns to the thermal valve through the liquid
line. Condenser fan speed is controlled with a
thermostatic switch located on rear of unit. At
ambient temperature of 100° F(±5°F) or above
the condenser fan speed will turn at high speed but
at ambient temperature below 100° F (±5° F) the
condenser fan will turn at low speed. Due to
residual mass heat there will be a delayed reaction
time for this to happen when ambient temperature
drops below the 100° F changeover point.
1-5. Differences Between Models
a. This manual covers Trane Model MAC6H18-
230-1201-01,
MA
C6H18-208-1201-02,
and
MAC4H18-208-1201-03 air conditioners. Each
model is designed to operate on a different set of
incoming
power
current
characteristics.
The
electrical characteristics for each model are as
follows :
(1) MAC6H18-230-1201-01. Single phase,
50/60 hertz, 230 volts.
(2) MAC6H18-208-1201-02. Three phase,
50 /60 hertz, 208 volts.
(3) MAC4H18-208-1201-03. Three phase,
400 hertz, 208 volts.
b. Where instructions and descriptions apply
only to specific models, the model numbers to
which the description or instructions apply will be
specified. If no model number is specified, the
instructions or descriptions apply to all three
models.
1-6. Identification and Tabulated Data
a. Identification. Each air conditioner has one
major identification plate mounted on the side of
the unit. The plate specifies nomenclature,
manufacturer, military part number, BTU / HR,
phase, hertz, volts, serial number, contract number,
and shipping weight.
A manufacturers iden-
tification plate mounted just below that military
plate contains the manufacturer’s name and ad
dress and the moodel and serial numbers.
b. Tabulated Data..
(1) Air conditioner (Model MAC6H18-230-
1201-01).
Nomenclature Air conditioner, horizontal,
compact
Manufacturer. . . . . ... . . . The Trane Company
Capacity :
Cooling. . . . . . . .. 18,000 BTU/HR
Heating. . .. .. .... . . .. . . 14,300~ BTU/HR
Phase.
. . . . . . . . . . 1
Hertz. . . . . . ..50/60
Volts
.
.
.
.
230
(2) Air conditioner (Model MAC6H18-208-
1201-02).
Nomenclature . .. . . .. . .... Air conditioner, horizontal,
compact
Manufacturer. . . . . . . . ...... .The Trane Company
Capacity:
Cooling. . . . . . . . . . . . . . 18,000 BTU / HR
Heating. .. . . . . . .. .. .. . 14,300 BTU/HR
Phase . . . . .. .. . . . ...3
Hertz..
.. . . . .. . . . .
50/60
Volts.
. . ... . . .. . . 208
(3) Air conditioner (Model
1201-03).
MAC4H18-208-
Nomenclature Air conditioner. horizontal.
compact
Manufacturer. . . . . . . .. . . .The Trane Company
Capacity:
Cooling. . . . . . .. . . . .
18,000 BTU / HR
H e a t i n g
14.300” BTU / HR
Phase..
. . . . . . . . .. 3
Hertz. . . . . . . ..400
V o l t s . . . . . . . . . . . .. 208
(4) Condenser fan motor (B2) and/or
evaporator fan motor (B3) (Model MAC6H18-
230-1201-01).
Manufacturer. . . . . . . . . .... . . IMC Magnetics Corp.
Model . . . . ........ FBC4620 (modified by marking
“97403 13216E6140-2”)
V o l t s . . . . . . . . . . . . 2 30
Hertz . . .. . . . . . . . . . . ..50/60
Phase.. . . . . . . ... . . ... . .. Single
RPM.. . . . .. . ........ 3450 / 1725
Horsepower. . . . . .. . . . ..
High.. . . . ... . . . . .. . . . 0.73
Low . . . . . .. 0.12
Amperes.. . . . . . . . . . . . . . . . ..
High. . . . . . . . . . . . . .
3..5
Low . . . . . . .. ....... 1.2
1-5
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