Carrier 50ET - Manual (Page 4)

HEATING A COOLING
50ET,QT
Single-Package Units
(5>
S>]
(5>
JM.
JH
JZL
_0_
WIRES FROM
UNIT CONTROL BOX
THERMOSTAT AND
SUBBASE (SEE BELOW) UNIT CONTROL BOX
WIRING TERMINAL BOARD
THERMOSTAT SUBBASE
99TZ900321 99TZ900361
99TZ900321 99TZ900391
THERMOSTAT/SUBBASE
99TZ900291
99TZ900401
99TZ900511
99TZ900541
COOLING UNIT WITH ELECTRIC HEAT HEAT PUMP WITH SUPPLEMENTAL ELECTRIC HEAT
Fig. 4 — Thermostat Connection Diagrams — 50ET,QT
3. Route thermostat wires through hole located on left
coil partition and up to low-voltage wire entrance
hole on control box front cover.
4. Remove 2 screws and slide control box to expose
low-voltage terminals. Attach wires to appropriate
terminals as shown on unit wiring diagram. See Fig. 4.
5. Attach thermostat to subbase and snap on thermostat
cover.
6. Cut and remove insulation from hole in metal cover
plate.
7. Replace metal cover plate.
8. Install accessory polymer front cover as described in
instructions shipped with accessory cover. Cut
rectangular hole for thermostat as indicated by mark
in back of cover.
TO MOUNT THERMOSTAT REMOTELY-
1. Pull field-supplied thermostat wires previously
installed up into wire entrance hole on control box
front cover and connect wires as described in Step 3,
paragraph 4, above.
2. Connect other ends of thermostat wires, hanging from
the wall at their remote location, securely into subbase
at appropriate terminals specified in unit wiring
diagram. See Fig. 4.
3 Mount subbase onto wall.
4.
Attach thermostat to subbase. Snap on cover and
install chassis indoor cover.
Step 4 — Set Indoor Fan Motor Speed — All
units are factory wired for low fan speed. Higherexternal
static pressure requirements can be met by wiring motor
for higher fan speed. See Table 3.
Step 5 — Install Accessory Electric Heater,
If Required — Refer to instructions packaged with
accessory heater. See Table 2 for part numbers.
» Table 3 — Service Data
SIZE 212 215 218 224 230
MODEL 50 ET I QT ET lOT ET 1 QT ET 1 QT ET 1 QT
R-22 CHARGE* (lb)
Refrig Control
2 3 I 2 7 2 3 ) 2 7
AccuRa
3 1 1 3 75
ter'" BypaE
4.0 1 4 5
s Type
3 9 ) 4 7
INDOOR FAN
Rotationt
Rpm
Diameter (in.)
Width (In.)
Range (cfm)
Motor Hp
Centrifugal Blower,
Direct Drive, 2-Speed
CW I CW I CW I CCW I CCW
1580 1550 1570 1675 1675
6 1 6 1 6 1 7 1 7
8
430/ 1 550/ 1 575/ 1 885/ 1 1025/
375 475 480 800 960
V. 1 '/, 1 % 1 '/4 1 '/4
OUTDOOR FAN
Ctm
Rpm
Diameter (In)
Motor Hp
Propeller, Direct Drive, Single Speed
1700 1 1700 1 2000 1 2000 1 2000
1125
15
’/
b
CCW — Counterclockwise
CW — Clockwise
‘Factory refrigerant charge
tLooking at fan motor shaft
START-UP
Crankcase Heater — The 50QT compressor is
equipped with a crankcase heater that is thermostatically
activated in cold weather. (See Fig. 2 and 3.) If tempera­
ture is below 65 F, operate crankcase heater 24 hours
before starting unit. To energize crankcase heater only,
after
chassis installation, set thermostat to ^^
position (for thermostat mounted on the chassis) or OFF
position (for remote-mounted thermostat) and turn on
unit power at disconnect switch.
t
Bookn 1 1 |4 |4 PC 131 Catalog No 535-078 PrintedinUSA Form 50ET.QT-3SI Pg4 5-85 Replaces 50QT-10SI
Tab llbisahalsa
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obiigations.
For replacement items use Carrier Specified Parts