Carrier WeatherMaster Series - Central Terminal Board; Unit Without Thru- - Base Connection Kit; Heat Anticipator Settings; Electric Heaters

21
Typical
Thermostat
Connections
Central
Terminal
Board
W1
Y2
Y1
R
W2
G
C
X
W1
Y2
Y1
R
W2
G
C
X
T–STAT
C
W2
G
W1
O/B/Y2
R
Y1
(Note 1)
Note 1: Typical multi-function marking. Follow manufacturer’s configuration
instructions to select Y2.
Note 2: W2 connection not required on units with single-stage heating.
Field Wiring
(Note 2)
C09351
Fig. 27 -- Typical Low--Voltage Control Connections
Central Terminal Board —
The Central T erminal Board (CTB) is a pass through
connectio n point. The CTB pro vid es the capability to add
factory--installed options and field--ins talled access o ries to
the units by cutting jumper wires without having to change
or reroute wires through the structure of the unit. The CTB
does not provide any microprocessor control; it is simply a
basic multifun ction wir ing terminal configu ratio n.
Unit without Thru--Base Connection Kit —
Pass the thermostat control wires through the hole provided
in the end panel (see item “D ” in the view labeled “LEFT”
in Fig. 2 and Fig. 3) then feed the wires through the raceway
built into the corner post to the control box. Pull the wires
over to the terminal strip on the upper--left corner of the
Central T erminal Board (CTB) See Fig. 28.
NOTE: If thru--the--bottom connections accessory is
used, refer to the accessory installation instructions for
information on routing power and control wiring.
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
50H C units may be equipped with factory or field--ins talled
electric heaters. The heaters are modular in design, with
heater frames holding open coil resistance wires strung
through ceramic insulators, limit sw itches and one or two
control contactors. One or two heater modules may be used
in a unit.
RACEWAY
HOLE IN END PANEL (HIDDEN)
C08027
Fig. 28 -- Field Control Wiring Raceway
Heate r modules a r e installed in the compartment below
the indoor (supply) fan outlet. Access i s through the
indoor access panel. Heater modules slide i nto the
compartment on tracks along the bottom of the heater
opening. See Fig. 29 -- 31.
Not all available heater modules may be used in every
unit. Use only those heater modules t hat are UL listed for
use in a specifi c size unit. Refer to the label on the unit
cabinet for the list of approved heaters.
Unit heaters are marked with Heater Model Numbers, but
heaters are ordered as and shipped in cartons marked with
a corresponding hea ter Sales Package part number. See
Table 2 for corre lation between Heater Model Number
and Sales Package part number.
NOTE: The value in position 9 of the part number differs
between the sales package part number (value is 1) and a
bare heater model numbe r (value is 0).
DISCONNECT MOUNTING
LOCATION
UNIT BLOCK-OFF
PANEL
OUTDOOR
ACCESS PANEL
INDOOR
ACCESS
PANEL
C08133
Fig. 29 -- Typical Access Panel Location
Table 2 – Heater Model Number
Bare Heater Model Number C R H E A T E R 0 0 1 A/B 0 0
Heater Sales Package P/N
Includes:
Bare Heater
Carton and packing materials
Installation sheet
C R H E A T E R 1 0 1 A/B 0 0