Heat Anticipator Settings; Unit Without Thru-Base Connection Kit - Carrier WeatherExpert Puron 50LC 08 Series Installation Instructions Manual

Typical
Thermostat
Connections
C
W1
W2
G
Y3
(Note 3 & 4)
O/B/Y2
(Notes 2, 3 & 4)
(Note 1)
Y1
R
Note 1: Typical multi-function marking. Follow manufacturer's configuration
Instructions to select Y2.
Note 2: Y2 to Y3 connection required for 2-stage cooling operation and when
integrated economizer function is desired.
Note 3: To Connect a 2-Stage Thermostat:
Y2 to Y3 connection required for 2-stage cooling operation which
provides low and high cooling states.
Note 4: SystemVu controller is default configured for 3-stage cooling and
2-stage heating thermostats; it can be configured for other thermostat types.
Field Wiring
Fig. 45 — Typical Low-Voltage Control Connections

UNIT WITHOUT THRU-BASE CONNECTION KIT

Pass the thermostat control wires through the bushing on the unit
end panel. Route the wire through the snap-in wire tie and up to
the web bushing near the control box. Route the wire through the
bushing and into the bottom left side of the control box after re-
moving one of the two knockouts in the corner of the box. Using a
connector at the control box to protect the wire as it passes into the
control box, pull the wires over to the terminal strip at the lower
left corner of the Integrated Staging Control (ISC) Board. Use the
connector at the control box and the wire tie to ensure that the ther-
mostat wire is tight and will not be damaged by contact with the
condenser coil. See Fig. 46.
NOTE: If thru-the-bottom connections accessory is used, refer to
the accessory installation instructions for information on routing
power and control wiring.
Fig. 46 — Thermostat Wire Routing
Integrated Staging Control
(ISC) Board or
SystemVu TM Controller
C
W1
T
H
W2
E
R
G
M
O
Y3
S
T
Y2
A
T
Y1
R

HEAT ANTICIPATOR SETTINGS

Set heat anticipator settings at 0.14 amp for the first stage and 0.14
amp for second-stage heating, when available.
Electric Heaters
50LC 08-12 units may be equipped with factory or field-installed
electric heaters. The heaters are modular in design, with heater
frames holding open coil resistance wires strung through ceramic
insulators, line-break limit switches and a control contactor. One
or two heater modules may be used in a unit.
Heater modules are installed in the compartment below the indoor
(supply) fan outlet. Access is through the indoor access panel.
Heater modules slide into the compartment on tracks along the
bottom of the heater opening. See Fig. 47.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage.
Not all available heater modules and single point boxes may
be used in every unit. Use only those heater modules that are
UL listed for use in a specific size unit. Refer to the label on
the unit cabinet for the list of approved heaters and single point
boxes.
DISCONNECT
MOUNTING
LOCATION
Fig. 47 — Typical Component Location
Single Point Boxes
When heaters are installed, power wiring to both heaters and the
rest of the unit is connected via the single point box accessory,
which will be installed directly under the unit control box, just to
the left of the partition separating the indoor section (with electric
heaters) from the outdoor section. The single point box has a
hinged access cover. See Fig. 48. The single point box also in-
cludes pigtails to complete the wiring between the single point box
and the unit's main control box terminals. The pigtails will already
be connected into the unit's main control box on units with facto-
ry-installed electric heat. Refer to the accessory heater and single
point box installation instructions for details on tap connections
for field-installed electric heat accessory.
29
CAUTION
SINGLE HEATER MANUAL RESET
POINT BOX COVERS LIMIT SWITCH
SINGLE POINT HEATER HEATER
BOX MODULE MODULE
MOUNTING (LOCATION 1) (LOCATION 2)
SCREW
HEATER
MOUNTING
BRACKET