Bryant 551J Electric Heaters, Heat Anticipator Settings, Heater Model Number

Typical

Thermostat

Connections

C

G

W2

W1

O/B/Y2

(Note 1) (Note 2)

Y1

R

Central

Terminal

Board

X

C

T

GH E

W2	R
	M
	O
W1
	S
	T
Y2
	A
	T
Y1
R

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

551J units may be equipped with field-installed accessory 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

Note 1: Typical multi-function marking. Follow manufacturer’s configuration Instructions to select Y2.

Note 2: Y2 to Y2 connection required on single-stage cooling units when integrated economizer function is desired.

Field Wiring

C08069

Fig. 22 - Low-Voltage Connections

Unit without thru-base connection kit —

Pass the thermostat control wires through the hole provided in the corner post; 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 Controls Connection Board. See Fig. 23.

RACEWAY

HOLE IN END PANEL (HIDDEN)

C08027

Fig. 23 - Field Control Wiring Raceway

indoor access panel. Heater modules slide into the compartment on tracks along the bottom of the heater opening. See Fig. 24, Fig. 25 and Fig. 26.

DISCONNECT MOUNTING

LOCATION

UNIT BLOCK-OFF	OUTDOOR	INDOOR
		ACCESS
PANEL	ACCESS PANEL	PANEL

C08133

Fig. 24 - Typical Access Panel Location (3-6 Ton)

Not all available heater modules 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.

Unit heaters are marked with Heater Model Numbers. But heaters are ordered as and shipped in cartons marked with a corresponding heater Sales Package part number. See Table 2 for correlation 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 number (value is 0).

551J

j

Table 2 – Heater Model Number

Bare Heater Model Number

C

R

H

E

A

T

E

R

0

0

1

A

0

0

Heater Sales Package PNO

Includes:

Bare Heater

C

R

H

E

A

T

E

R

1

0

1

A

0

0

Carton and packing materials

Installation sheet

15