Zonex System 2000, Design & Installation Manual

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4
The 101ASSB System Controller consists of the following:
A.
TB1 (Terminal Block 1): Wires to daisy chain, transformer
and time clock.
TC1, TC2 – Time clock switch terminals. Used for Select-Temp
system only.
S – Nite call. Used for Select-Temp system only.
Y – Cool call.
W – Heat Call.
Rd – Damper close signal.
B – 24V AC common. Same terminal as TR2.
G – 24V AC hot. Same terminal as TR1 when PWR switch ON.
TR2 – 24V AC common.
TR1 – 24V AC hot.
B.
Jumpers J1 and J2:
J1 – Not used.
J2 – Not used for System 2000. Used for Select-Temp system
only.
C.
Microcontroller: Responsible for zone communication, activation
and control of outputs based upon zone demand and leaving air
temperature. Occasionally software upgrades may become avail-
able. If so, the 101ASSB software can be field upgraded by chang-
ing this microcontroller.
D.
Off board fuse: One amp. Protects Y and W terminals of TB1.
E.
Status lights: Refer to status light section for details.
F.
TB2 (Terminal Block 2): Wires to Capacity Controller and
HVAC unit.
R – HVAC unit 24V AC power
W1 – Heat enable
Y1 – Cool enable
G – Indoor blower fan enable
G.
FAN switch:
AUTO – Turns on indoor blower fan when unit is running in cool
mode.
ON – Indoor blower fan runs continuously.
H.
COOL and HEAT mode switches:
AUTO – Accepts calls from thermostats.
OFF – Ignores calls.
I.
Power switch. When on, applies 24V AC power to G of TB1.
J.
On board fuse. One amp. Protects 101ASSB board only.
DELAY On when HVAC unit energized. Flashing when in purge/delay mode.
HEAT* On in heat mode.
COOL* On in cool mode.
DAMPER When on, dampers of zones not calling for present mode are closed.
UNIT On when HVAC unit energized.
R W1 Y1 G
TB2
ON
OFF
OFF
OFF
AUTO
ON
AUTO
TB1
TR2 TR1
1
TC2 TC1
1
S Y W Rd B G
A
J
C
B
D
E
I
H
G
F
101ASSB
DELA
Y
HEA
T
COOL D
AMPER
UNIT
J1 J2
SET BA
CK
FA
N
HEA
T
COOL
PWR
Status Lights Mode Function
Delay Heat* Cool* Damper Unit
0 1 0 0 0 Heat, no calls HVAC unit off. All dampers open.
0 0 1 0 0 Cool, no calls HVAC unit off. All dampers open.
1 1 0 1 1 Heat call Heat energized. Heat calling zone dampers open.
1 0 1 1 1 Cool call AC energized. Cool calling zone dampers open.
FLASH 1 0 1 0 Purge heat Blower fan on, HVAC unit off. Heat calling zone dampers open.
FLASH 0 1 1 0 Purge cool Blower fan on, HVAC unit off. Cool calling zone dampers open.
*MODE LIGHTS TOGGLE BETWEEN HEAT AND COOL EVERY 120 SECONDS. THIS INDICATES THE SYSTEM CONTROLLER IS POLLING FOR HEAT OR COOL CALLS.
SYSTEM 2000 CONTROLLERS – GAS/ELECTRIC
101ASSB
STATUS LIGHTS
COMPONENTS