Honeywell TZ-3 OPERATION

TZ-3 TOTALZONE® ZONE CONTROL PANEL

68-0223-2 10

OPERATION

Sequence of Operation

On a call for heatin

or coolin

, the zone dam

er sta

s o

to the callin

zone, and the dam

ers close to the zones that

are not callin

. The TZ-3

anel brin

s on the heatin

coolin

and conditioned air is delivered to the callin

zone

until that zone is satisfied. When the call is satisfied, the

stem enters the Pur

e mode. This holds o

en the dam

of the last zone callin

and

es into that zone. The

time can be set to three and one-half or two minutes. After

e, all dam

ers return to the O

osition.

zone thermostat can call for heatin

or coolin

. If there

are co-existin

calls for heat and cool, the

anel first acce

the first call. Once that call is satisfied, or a maximum of 20

minutes has ela

sed, the

anel switches to allow the o

osite

call.

On a call for heatin

or coolin

, the heat LED illuminates red

or the cool LED illuminates

reen. The zone dam

er LED

turns

reen for the zone callin

, and the dam

ers in the zones

not callin

close and turn red. As AOBD dam

ers move, the

LEDs turn amber.

Purge Mode

At the end of ever

call for heat or cool, the

anel enters a

Pur

e mode that holds o

en the callin

zone dam

er for three

and one-half or two minutes. Durin

this time, the

anel or the

HVAC e

ment can o

erate the fan. Pur

e also serves as a

time dela

revent short c

clin

of the heatin

and coolin

ment after each call. Pur

e LED li

hts to si

nal that the

stem is in the Pur

e mode. Pressin

the

e override

button for two seconds overrides the Pur

e mode. Unless

there is a new call for heat or cool durin

the Pur

e mode, all

dam

ers are moved to the O

osition at the end of

Individual Zone Fan Control

When all zones are satisfied, the Fan switch of each

thermostat controls the fan o

eration for that zone. When the

Fan switch is in the On

osition, the fan is ener

ized, and the

dam

ers close to zones where the Fan switch is in the Auto

osition. If there is a call for heat or cool durin

this time, the

circulation mode ceases, and the heat or cool call is honored.

When the zone callin

is satisfied, the circulation call

resumes.

Single and Mu lti-Stage Oper ation

The

anel can control u

to three sta

es of heatin

and two

sta

es of coolin

. The first sta

e is ener

ized b

the

thermostat. The second sta

e of heatin

is brou

ht on b

the

thermostat, timer, or number of zones callin

. The third sta

of heatin

is brou

ht on b

the timer or number of zones

callin

. The second sta

e of coolin

is brou

ht on b

the timer

or number of zones callin

The followin

instructions show how to confi

ure the

anel for

sta

e control.

If the e

ment is sin

le sta

e, set the DIP switches as

follows:

1st Stage by Thermostat, 2nd and 3rd Stages by

Timer (Fig. 18)

The thermostat controls the first sta

e of heat or cool. If the

call is not satisfied b

the first sta

e within the time set on the

timer, the

anel ener

izes the second sta

e. If the call for heat

is not satisfied b

the second sta

e within the time set on the

timer, the

anel brin

s on the third sta

Set the DIP switches as follows:

Fig. 18. Stage timer.

1st Stage by Thermostat, 2nd Stage Heat by

Thermostat

The thermostat controls the first sta

e of heat or cool and the

second sta

e of heat. The timer controls the second sta

e of

cool and third sta

e of heat. If the first and second sta

combined do not satisf

the heat call within the time s

ecified

on the timer, the

anel brin

s on the third sta

e of heat.

Set the DIP switches as follows:

DIP Switch

Number Status Purge Time

3Off 3.5 minutes

3On 2 minutes

DIP Switch

Number Status Fan Control

4Off Panel control of fan

4On HVAC control of fan

DIP Switch Number Status

1Off

5Off

DIP Switch Number Status

1Off

5Off

15 MINUTES

10 MINUTES

5 MINUTES

20 MINUTES

25 MINUTES

30 MINUTES

STAGE TIMER M19078