TZ-3 TOTALZONE® ZONE CONTROL PANEL
68-0223-2 12
Rebooting M icr op rocessor
Certain conditions can han
g
u
p
the micro
p
rocessor. To reset
it,
p
ress and release the Boot button. The s
y
stem reboots and
enters the Pur
g
e mode.
Discharge Air Temperature Sensor
The Dischar
g
e Air Tem
p
erature Sensor
(
not included
)
is a
su
pp
l
y
-duct-mounted tem
p
erature
p
robe used to control
ca
p
acit
y
and
p
revent over-heatin
g
or coil-icin
g
. The sensor
attaches to the TL terminals on the
p
anel.
Set the hi
g
h limit tem
p
erature on the maximum tem
p
erature
dial on the
p
anel, located left of the sta
g
e timer. See. Fi
g
. 19.
Set the tem
p
erature from 110 °F to 160°F in ten-de
g
ree
increments. The recommended settin
g
for fossil fuel/ electric
s
y
stems is 160°F
(
default factor
y
settin
g)
. For heat
p
um
p
s
y
stems, the recommended settin
g
is 120F.
The coolin
g
tem
p
erature limit can be set at 40°F or 48°F.
Fig. 19. Maximum temperature dial.
IMPORTANT
Be sure the Discharge Air Temperature Sensor wir-
ing does not run parallel with line voltage wiring
unless more than 12 in. of separation exists or
shielded cable is used.
Use DIP switch 2 to chan
g
e coolin
g
limit settin
g
s.
If the s
y
stem tri
p
s due to exceedin
g
a hi
g
h or low tem
p
erature
limit, the heatin
g
or coolin
g
s
y
stem shuts down and the fan
continues runnin
g
to
p
ur
g
e the conditioned air from the
p
lenum.
When the low limit is tri
pp
ed, the Cool LED flashes until it
resets. When the hi
g
h limit is tri
pp
ed, the Heat LED flashes
until it resets.
Once the tem
p
erature recovers b
y
ten de
g
rees, the
e
q
ui
p
ment run resumes.
Zone-A-Lone Switch
When the Zone-A-Lone switch is in the occu
p
ied
p
osition and
the OC/OC terminals are not used, the s
y
stem functions as a
normal zone control s
y
stem. When switched to the
unoccu
p
ied
p
osition, all dam
p
ers are o
p
ened and all re
q
uests
for heat, cool, or fan, exce
p
t from zone one, are not honored.
The zone one thermostat becomes the controllin
g
thermostat
for the entire s
y
stem. Durin
g
lon
g
unoccu
p
ied
p
eriods, one
thermostat can be set back instead of ad
j
ustin
g
each zone
thermostat in the buildin
g
.
The T8601D2027 and T8611G2051 include two OC terminals.
When wired to the TZ-3 OC terminals, and with the Zone-A-
Lone switch in the occu
p
ied
p
osition, the board enters the
unoccu
p
ied mode durin
g
the Leave and Slee
p
p
ro
g
rams. This
feature re
q
uires two extra wires to the Zone 1 thermostat.
Circuit Breaker Protectio n
A built-in thermal circuit breaker
p
rotects the TotalZone
p
anel.
This circuit breaker
p
rotects the
p
anel a
g
ainst shorts in the
thermostat and dam
p
er wirin
g
and the remote occu
p
ied/
unoccu
p
ied switch. It does not
p
rotect a
g
ainst shorts in the
wirin
g
of the HVAC e
q
ui
p
ment into the
p
anel.
When the circuit breaker is tri
pp
ed, none of the LEDs
illuminate and the
y
ellow rectan
g
ular com
p
onent located to
the left of the TR1 and TR2 terminals is hot to the touch.
Remove
p
ower to the
p
anel for at least ten seconds to allow
the circuit breaker to cool off and reset. To eliminate the short,
verif
y
the dam
p
ers and thermostat wirin
g
.
Fan On In Heat
The s
y
stem blower can be set to come on with a call for heat
as re
q
uired for h
y
dro-air, heat
p
um
p
, or electric heat s
y
stems.
Set the blower usin
g
DIP switch 8.
TotalZone Add-A-Zone Panels
Usin
g
TotalZone Add-A-Zone Panels, the s
y
stem can be
ex
p
anded to u
p
to 30 zones. There are three models: TAZ-1,
one zone; TAZ-2, two zone; and TAZ-3, three zone. Two wires
are re
q
uired to connect the TAZ to the TZ-3.
IMPORTANT:
When multiple panels are used, it is important that
the transformers be in-phase. Check the phasing by
measuring for 24V across the TR2 transformer termi-
nals on each panel. There should be 0 Vac. If not,
reverse the TR1and TR2 transformer wires on one of
the panels and recheck.
See Fi
g
. 13 and the TAZ installation instructions for more
information.
Dip Switch Status
Cooling
Temperature
Limit
2Off 40°F
2On 48°F
130 F
MAXIMUM
TEMPERATURE M19079
120 F
110 F
140 F
150 F
160 F
DIP Switch 8 Fan Control
Off HVAC s
y
stem
On Fan on in heat