83
NOTE: The References above for T1J1 through T1J9 are to show the
path of transformer 1 as is goes through the board and safety devices.
Scrolling Marquee Display
This device is the keypad interface used to access rooftop in-
formation, read sensor values, and test the unit. (See Fig. 37.)
The scrolling marquee display is a 4-key, 4-character, 16-seg-
ment LED (light-emitting diode) display. Eleven mode LEDs
are located on the display as well as an Alarm Status LED. See
Basic Control Usage section for further details.
Accessory Navigator™ Display
The accessory hand-held Navigator display can be used with
48/50HC units. (See Fig. 38.) The Navigator display operates
the same way as the scrolling marquee device. The Navigator
display plugs into the LEN port on either TB or the ECB board.
Fig. 37 — Scrolling Marquee
Table 34 — Central Terminal Board (CTB) Connections
CONNECTION LABEL PIN NUMBER POINT DESCRIPTION 24Vac FROM 24Vac TO
DDC T-STAT
7 Compressor 1 Call MBB ECON
6 Compressor 2 Call MBB ECON
5 Heat Stage 1 Call MBB CONTL BOARD
4 Heat Stage 2 Call MBB CONTL BOARD
ECON
1,2 Comp 1 Call jumper DDC T’STAT CLO1/COMP1
3,4 Comp 2 Call jumper DDC T’STAT CLO2/COMP2
CLO1/COMP1
3 Comp 1 Contactor Common CTB C C1 - Coil
4,5 Comp 1 Jumper ECON CIRCUIT 1 LPS
6 Comp 1 Contactor Signal CIRCUIT 1 HPS C1 - Coil
CLO2/COMP2
3 Comp 2 Contactor Common CTB C C1 - Coil
4,5 Comp 2 Jumper ECON CIRCUIT 2 LPS
6 Comp 2 Contactor Signal CIRCUIT 2 HPS C1 - Coil
7 ODF Contactor Signal ECON OFC1 - Coil
CIRCUIT 1
HPS
Comp 1 High Pressure
Switch
CIRCUIT 1 LPS CLO1/COMP1
LPS Comp 1 jumper CLO1/COMP1 CIRCUIT 1 HPS
CIRCUIT 2
HPS
Comp 2 High Pressure
Switch
CIRCUIT 2 LPS CLO2/COMP2
LPS Comp 2 jumper CLO2/COMP2 CIRCUIT 2 HPS
CONTRL BOARD
2 Heat Stage 2 Call DDC T’STAT Gas Valve or PL3
3 Heat Stage 1 Call DDC T’STAT IGC-W or PL3
4 IGC Common/Ground CTB C IGC C
5
Transformer 1 Common/
Ground
TRAN1 Common CTB C
6 IGC Call for Indoor fan IGC IFO CONTL BOARD
7 IGC Call for Indoor fan CONTL BOARD MBB
8 IGC power (T1J9) CTB R IGC R
9 Transformer 1 Power (T1J1) TRAN1 24Vac UNIT SHUTDOWN
10
Indoor Fan overload signal
(T1J9)
Fan overload CTB R
11
Indoor Fan overload source
(T1J8)
PMR Fan overload
PMR
1 Ground CTB C PMR Device
2
Phase Monitor Source
(T1J6)
UNIT SHUTDOWN PMR Device
3
Phase Monitor Normally
Closed Signal (T1J7)
PMR Device CONTL BOARD
UNIT SHUTDOWN
REMOTE SHUTDOWN
Remote Disable Switch if
installed (T1J4 and T1J5)
SMOKE SHUTDOWN PMR
SMOKE SHUTDOWN
Normally Closed Smoke
Detector Contact (T1J3)
Smoke Detector REMOTE SHUTDOWN
24V OUT
Smoke Detector Controller
Power (T1J2)
CONTL BOARD Smoke Detector
C
Smoke Detector Controller
Common
CTB C Smoke Detector
R Spades
Transformer 1 Power after
Safety Chain (T1J9)
CONTL BOARD
C Spades Ground CONTL BOARD
Run Status
Service Test
Temperature
Pressures
Setpoints
Inputs
Outputs
Configuration
Time Clock
Operating Modes
Alarms
Alarm Status
ENTER
MODE
ESCAPE
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