Honeywell TZ-3 Thermostat Operation

TZ-3 TOTALZONE® ZONE CONTROL PANEL

11 68-0223-2

Stages Based On Number of Zones Calling

The thermostat controls the first sta

e of heat or cool. The

second sta

e of heat and cool and the third sta

e of heat are

ener

ized b

the

ercenta

e of zones callin

. See Table 4.

Set the DIP switches as follows:

See Table 4 to determine the number of zones re

uired to

activate sta

es of e

ment based on the number of zones in

the s

stem. Sta

is based on the zones available in the

stem, not the number of zones used for the

articular

lication. As zones satisf

, sta

es 2 and 3 dro

out.

Thermostat Operation

Conventional Thermostats

Conventional

(

R,W,Y,G

)

heat/cool thermostats can be used

with the TZ-3 to control sin

le or multi-sta

as, electric or oil

stems and heat

s with auxiliar

heat. The

anel can

be confi

ured to control second sta

e heat and cool and third

sta

e heat usin

a 5-30 minute

anel, or sta

can be

controlled b

the

ercenta

e of zones callin

. The O and B

ment terminals are ener

ized for chan

eover use with

heat

Heat Pump Thermostats

HEAT PUMP THERMOSTATS WITH SINGLE Y OUTPUT

Heat

thermostats can be used if thermostat control of

2nd sta

e is desired. Thermostats that have a sin

le Y

terminal for first sta

e heat and cool can be used. When

selected, all thermostats must be similar.

If the thermostat ener

izes 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

ener

izes B on a call for heat, DIP switch 6 must be set to On

and the B wire connected to W on the

anel. In either case,

the O is alwa

s ener

ized to the e

ment in coolin

, and the

B is alwa

s ener

ized to the e

ment in heatin

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

thermostats with se

arate Y1 and W1

terminals for first sta

e heat and cool. Kee

DIP switches 6

and 7 in the Off

osition when thermostat O or B wire is not

used.

Emergency Heat Control

Emer

enc

heat is defined as usin

an auxiliar

heat source

without usin

the heat

. When the Em Heat switch or a

thermostat

uts the

anel in the emer

enc

heat mode, the

heat

is locked out and calls for heat are sent to the E

terminal.

A heat

thermostat can also control emer

enc

heat

from the thermostat s

stem switch. An L terminal ener

ized

durin

the emer

enc

heat mode is re

uired. The

recommended heat

thermostats all have hot L

terminals. See Table 1.

The two sta

e Em heat

er connects W2 and E. Jum

both

ins to ener

ize the W2 e

ment on a call for

emer

enc

heat. When E is a different source of heat than

W2, remove the

(

for exam

le, two-sta

e heat

with electric heat stri

auxiliar

heat

)

. The

er is located

below the e

ment terminals on the lower-left corner of the

anel.

Multi-Stage Thermostats

Use multi-sta

e thermostats to control two sta

es of heat via

W1 and W2 thermostat terminals. Control the third sta

e of

heat throu

h the sta

e timer built into the

anel. Control the

second sta

e of coolin

with the timer.

Manual and Automatic Changeover Thermostats

Automatic chan

eover thermostats

rovide automatic

chan

eover b

zone. Manual chan

eover thermostats heat or

cool based on the mode of each zone thermostat.

DIP Switch Number Status

1Off

5On

DIP Switch Number Status

1On

5Off

Table 4. Staging by Percentage of Zones Calling.

Number of

Zones in

System

Number of Zones Required

2nd Stage

Heat 3rd Stage

Heat 2nd Stage

Cool

32 32

42 33

52 43

63 54

73 54

83 65

94 75

10 4 7 6

11 4 8 6

12 5 9 7