Honeywell ZG 215VN OPERATION AND PUTTING INTO SERVICE

Comfort Compact Controller ZG 215VN

OPERATION AND PUTTING INTO SERVICE

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5

B

BC

ZG215 VN

auto1

P1 CB

L1 L2 P1

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C( )

0

-8

P1

S

8311.7151

CB

C

CB50268

B

A

Constant discharge temperature control

TW

V

FT

LF

VM

DR

ZG 215VN

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CB2282

ZG Control Unit
VM Servomotor
DR Heating mixing valve
LF Air flow sensor

TW Temperature selector (opt.)
FT Frost protection thermostat
V Air heater

Constant flow temperature control for a
floor heating system

TW

ZG215VN

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ZG Control Unit
VM Servo motor
ZR Heating mixing valve
VF Flow sensor

VF

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VM

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P

ZR

TW Temperature selector
T Temperature limiter
P Heating circuit pump

T

CBZG107.cdr

Operating the Control

The ZG 215VN can be used at choice for the control of an
air-handling system’s constant discharge temperature (left-

hand system diagram) or a floor heating’s constant flow tempe
rature (right-hand system diagram).

TheVF/LF temperature sensors monitor constantly the actual va
lues and transmitthese values to theZG control unit. Should the “

temperature or the supply temperature deviate from the target va
lue, the controller commands the VM servo motor to adjust the
ZR/DR mixing valve.

The mixing valve performs the necessarychange tothe mixing ra
tio betweenthe heated supplywater and theheating circuit’s retur

ning cooled water.
TheTW temperature selector is used as remotecontrol. By means

of theP2 selector knobthe flow or supplytemperature can be mo
dified. The temperature selector is not absolutely necessary in

functional terms, but it makes the operation easier.
The FT frost protection thermostat (air-handling system only)

works independentlyfrom the controlunit and protects theair hea
ter against freezing.

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Operating and Display Components

Pos. Function Basic Setting

B Day mode
C Reduced mode
P1 Sensitivity 5
S Operating mode selector auto
L1 ”Hotter“ LED (red)
L2 ”Colder“ LED (green)
1 Instructions compartment
2 Heating curve diagram
3 Basic Settings
4 Reserve trip pins
5 Inserted trip pins
6 Timer (optional)
7 Pointer for the current time

Settings on the Temperature Selector

P2 Selector knob

Operating Mode Selector

manu The control unit is deactivated (the timer runs).

The mixing valve can be set manually (by hand).
The pump is switched on.

auto Recommended setting for higher energy saving:

automatic change between day and reduced mode
according to the timer with night switch-off.

Only night mode, timer not active.

Constant reduced mode according to the settings on
the setting knobs B minus C , the timer remains

inactive.

LED’s

L1 L2

Both LED’s light up:
”neutral“

– mixing valve stops

only red LED lights up:
”hotter“

– mixing valve opens

only green LED lights up:
”colder“

– mixing valve closes

In themanu settings ofthe operating modeselector S there isno
LED display.

Putting into service

Set the timer 6 with the current time

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Set the operating mode selector S to auto

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The remaining basic factory settings are printed under 3 on the
control unit.

Timer for reduced mode 6

With theaid of thetimer, the roomtemperature during idleperiods
can be reduced automatically to save on operating costs.

The timer has a built-in power reserve of approx. 60 hours thanks
to a rechargeable battery.

Changing the program

Factory settings: red pin 6:00, bluepin 22:00.

Pull out the trip pin and insert it again at the desired

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switch-on time. Push in the trip pins until they reach the
stop!

Owing to the different lengths, the trip pins must always be inser
ted in a red/blue alternate ordere. Thered trip pinswitches on day

mode, while the blue pin activates reduced mode.
In order tomake sure that the rooms areheated well in the morning,

the heating system’sday mode should be activatedbetween a half
an hour and an hour before using the rooms.

Energy saving tip: Reduced mode can be activated
up to an hour before the room is left. The storage

capacity of the heating system and building is
enough to keep the rooms warm for some time.

Timer with day program

The day program is repeated every 24
hours. Ifa (second) decrease intempera

ture is desired in thecourse of the day to
save energy,the program needs tobe ex

tended. Take the extra trip pins 4 and
insert them at the desired time.

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CB5044.7.cdr

Example:

Desired time program
Normal temperature: 6:00 h to 8:00 h and 16:00 h to 22:00 h

Night decrease: 22 :00 h to 6:00 h
Day decrease: 8:00 h to 16:00 h

Position of the trip pins

red pin 6:00 h – Start day mode (normal temperature)

blue pin 8:00 h – Start day decrease

red pin 16:00 h – Start day mode (normal temperature)

blue pin 22:00 h – Start night decrease

Timer with week program

The timer has a changeable dial.
With the week program, dialling a different heating program for

each weekday is possible.
The dial isprepared ex factory for theday programand, if required,

it can bechanged toweek program (see installationinstructions).

Setting the right time

To set the time, the time dial is to be placed on the trip pins and

turned clockwise until the indication on the setting marker 7

matches with the current time.

Optimization of the Settings

The ZG 215VN control unit is a constant temperature controller.
The desired temperature, e. g. the supply temperature of an

air-handling system or the flow temperature of a heating system
can be set on the setting knobs B and C of the controller.

Day mode (setting knob B )

The selectingrange onthe setting knob B varies from0 to 100°C.
Normally the setting knob B sets the desired target value for day
mode.

If a temperature selector is used as a
remote control, the setting knob B is to be

set on 20.

Reduced mode (setting knob C )

By meansof setting knob C , the intensity ofthe decrease tobe ac
tivated withthe timercan be set. The settingrange varies from 0 to

-100 K (°C). The decrease set with setting knob C refers to the
temperature either on setting knobBor on the TW.

Example (without TW)

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Setting on the setting knob B è 50
Setting on the setting knob C è

i. e. for normal mode (day mode): constant target value of 50 °C,
for reduced mode (night) a target value of 30 °C.

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Example (with TW 23)

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Setting on the setting knob B è 20
Setting on the TW 23’s selector knob P2 è 50

Setting on the setting knob C è -20

Both settings give target values of 50 °C in the day and of 30 °C at
night.

Setting the target value

Temperature selector TW 21 to 23
When using a temperatureselector the setting knob B on thecon

troller is always to be set on 20. The setting of the selector knob

P2 on the TW is relevant for the target value.

There are temperature selectors for various temperature ranges:
TW 21 – settable temperature range -15... + 15° C

TW 22 – settable temperature range 0… 30 °C
TW 23 – settable temperature range 20… 70 °C

If notemperature selector isavailable, the desiredtarget value isto
be set on the setting knob B of the control unit

Energy saving tip:
Set the operating mode selectorSon .

The controller hence works constantly in reduced
mode.

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Troubleshooting Checklist

Is the heat generator at the required temperature?

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è Read the heat generator’s thermometer.

Is the burner ready?

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Is the burner failure lamp on?

è If necessary, press the reset button.

Was the temperature selector set by mistake?

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Setting of the selector knob P2

Check the setting of the control unit.

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Setting knobs BCand operating mode selector S .
Is the timer running? Is the displayed time correct?

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è Check the time and switch-on point.

If the problem still has not been solved after checking the settings,
position the setting knob B on +7

The servomotor should now open the mixing valve and the red
LED L2 should light up. Ifthis is not the case, the control system

has failed. Contact your heating technician.

Manual mode

CB5043.7.cdr

Manual mode (fig. on the left)

In case of the breakdown of the heating mode regulation, you can
proceed temporarily as follows:

1. Set the operating mode selector S on manu .

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2. Open the mixing valve by hand until the desired flow and

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room temperatures are reached.

– The coupling incorporated in the mixing valve drive unit

provides for the release of the connection between the
motor and the mixing valve.

– Press firmly on the unlock key on the cover of the drive

unit and keep the key pressed (firmly!).

– Use the setting lever to set the mixing valve in the

desired position.

After eliminating the problem, the mixing valve is
set again to the right position by the control unit in

automatic mode.

Behavior of the target values
during day and reduced mode

B

BC

Day mode setpoint

C ()

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Reduced mode
setpoint

Instructions for the Technician (only!)

Removing the Timer

(see also the installation instructions)

Operating steps:

1. Pull out the instructions case.

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2. Hold the timer by the two white stems and turn to the left

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until the connector is released.

3. Remove the timer.

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(To install the timer proceed in the opposite order.)

Regulation Stability (Sensitivity)

The stability of the regulation can be modified with the setting
potentiometer P1 .

For the regulation technician:

By means of P1, set the proportionalrange ofthe PD control unit.
Recommended basic setting: P1 è 10.

In case of unstable regulation set higher values.

Flow- and airflow-sensors

LF20

VF 20AVF20

Reference

Installation instructions
Compact Control Units ZG 215N / 215 VN / 252 N

EN 1H-0181 GE51

Operating Instructions
ZG 252N:EN-2H0215 GE51

ZG 215N:EN-2H0216 GE51
ZG 215V:EN-2H0217 GE51

“Informationsschrift”(Planning broschure in German)
L3 – Komfort Compact Regler

GE-0H 0327 GE51

Centra Regelungstechnik http://www.honeywell.de/hga
Honeywell AG

Böblinger Straße 17
D 71101 Schönaich

Telefon [phone]
Telefax [phone]

Technical data may be changed without prior notice.

EN 2H-0217 GE51 R1001 7157 560