Honeywell T775A2009 User Manual

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS
33 63-7147—05
T775 APPLICATION
REPLACEMENT EXAMPLES
This section describes how a T775 Series 2000 Electronic
Stand-Alone Controller is wired and programmed to replace
various older generation Honeywell devices.
T775M2030 Replacement for W973A
Logic Panel
This replacement example illustrates how a T775M2030 is
configured to replace a two-stage Heat and two-stage Cool
W973A Logic Panel.
• Fig. 42 illustrates the wiring connections for the W973A
Logic Panel.
• Fig. 43 and Table 2 on page 35 illustrate the wiring and
configuration of the T775M2030 controller.
Fig. 42. W973A wiring connections (pre-existing control).
NOTE: The T775M2030 Replacement for W973A Logic Panel continues on the next page.
W973A
T
YBWRTT15243T1 R
T7067 THERMOSTAT
15243
8
7
6
SENSOR STAT 24V ECONO
MOD-HEAT MOD-COOL
WCBCRC
RHBHWH
W
R
L1
(HOT)
L2
L1
(HOT)
L2
R
1HEAT2
1COOL2
C +20 NH
COOL 1
COOL 2
HEAT 2
HEAT 1
T675A HIGH LIMIT
T675A COMPRESSOR LOCKOUT
1
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
W973A SHOWN. W973B HAS 3 HEAT AND 3 COOL STAGES.
USE MODULATING AND/OR OUTPUT RELAYS DEPENDING ON APPLICATION.
USE FAN START RELAY AND/OR PLENUM FAN CONTROL FOR AUTOMATIC FAN OPERATION IN
HEATING MODE.
3
2
4
M24562
R1
B1
W1
T2
T1
L1
(HOT)
L2
C7046
DISCHARGE
SENSOR
1
W1
B1
R1
T2
T1
L1
(HOT)
L2
FAN START
RELAY
L1
(HOT)
L2
FAN RELAY
(OPTIONAL) PLENUM
FAN CONTROL
4
1
1
1
B1
W1
R1
T2
T1
L1
(HOT)
L2
1
2
4
MIN. POSITION
POT ENTIOMETER
H205 OUTSIDE
AIR CHANGEOVER
31 2
BWR
M954 MOTOR
(HEATING)
3
M954 MOTOR
(COOLING)
M955 MOTOR (ECONOMIZER)

Honeywell T775A2009 Specifications

General

Brand	Honeywell
Model	T775A2009
Category	Controller
Language	English