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Thermostat Operation - Honeywell TrolATemp TZ-3 TotalZone Product Data

Zone control panel
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DIP Switch Number
1
5
Stages Based On Number of Zones Calling
The thermostat controls the first stage of heat or cool. The
second stage of heat and cool and the third stage of heat are
energized by the percentage of zones calling. See Table 4.
Set the DIP switches as follows:
DIP Switch Number
1
5
See Table 4 to determine the number of zones required to
activate stages of equipment based on the number of zones in
the system. Staging is based on the zones available in the
system, not the number of zones used for the particular
application. As zones satisfy, stages 2 and 3 drop out.
Table 4. Staging by Percentage of Zones Calling.
Number of Zones Required
Number of
Zones in
2nd Stage
System
Heat
3
2
4
2
5
2
6
3
7
3
8
3
9
4
10
4
11
4
12
5

Thermostat Operation

Conventional Thermostats
Conventional (R,W,Y,G) heat/cool thermostats can be used
with the TZ-3 to control single or multi-stage gas, electric or oil
systems and heat pumps with auxiliary heat. The panel can
be configured to control second stage heat and cool and third
Status
Off
On
Status
On
Off
3rd Stage
2nd Stage
Heat
Cool
3
2
3
3
4
3
5
4
5
4
6
5
7
5
7
6
8
6
9
7
11
TZ-3 TOTALZONE® ZONE CONTROL PANEL
stage heat using a 5-30 minute panel, or staging can be
controlled by the percentage of zones calling. The O and B
equipment terminals are energized for changeover use with
heat pumps.
Heat Pump Thermostats
HEAT PUMP THERMOSTATS WITH SINGLE Y OUTPUT
Heat pump thermostats can be used if thermostat control of
nd
2
stage is desired. Thermostats that have a single Y
terminal for first stage heat and cool can be used. When
selected, all thermostats must be similar.
If the thermostat energizes O on a call for cool, DIP switch 7
must be set to On and the O thermostat wire connected to W
on the thermostat connections for that zone. If the thermostat
energizes B on a call for heat, DIP switch 6 must be set to On
and the B wire connected to W on the panel. In either case,
the O is always energized to the equipment in cooling, and the
B is always energized to the equipment in heating.
IMPORTANT
Be sure DIP switches 6 and 7 are never both in the
On position.
HEAT PUMP THERMOSTATS WITH SEPARATE Y1 AND W1
TERMINALS
Use heat pump thermostats with separate Y1 and W1
terminals for first stage heat and cool. Keep DIP switches 6
and 7 in the Off position when thermostat O or B wire is not
used.
Emergency Heat Control
Emergency heat is defined as using an auxiliary heat source
without using the heat pump. When the Em Heat switch or a
thermostat puts the panel in the emergency heat mode, the
heat pump is locked out and calls for heat are sent to the E
terminal.
A heat pump thermostat can also control emergency heat
from the thermostat system switch. An L terminal energized
during the emergency heat mode is required. The
recommended heat pump thermostats all have hot L
terminals. See Table 1.
The two stage Em heat jumper connects W2 and E. Jumper
both pins to energize the W2 equipment on a call for
emergency heat. When E is a different source of heat than
W2, remove the jumper (for example, two-stage heat pump
with electric heat strip auxiliary heat ). The jumper is located
below the equipment terminals on the lower-left corner of the
panel.
Multi-Stage Thermostats
Use multi-stage thermostats to control two stages of heat via
W1 and W2 thermostat terminals. Control the third stage of
heat through the stage timer built into the panel. Control the
second stage of cooling with the timer.
Manual and Automatic Changeover Thermostats
Automatic changeover thermostats provide automatic
changeover by zone. Manual changeover thermostats heat or
cool based on the mode of each zone thermostat.
68-0223-2

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