Honeywell ZG 215VN User manual

OPERATION AND PUTTING INTO SERVICE
Comfort Compact Controller ZG 215VN
P1 CB
auto1
ZG215VN
-8 0
8311.7151
CB50268
P1 CB
142376
CB
L1 L2 P1 A
S
5
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BC
B
C( )

Constant discharge temperature control
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FT
ZG 215VN
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CB2282
TW
VM
V
DR
LF
ZG Control Unit
VM Servomotor
DR Heating mixing valve
LF Air flow sensor
TW Temperature selector (opt.)
FT Frost protection thermostat
VAir heater

Constant flow temperature control for a
floor heating system
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P
VF T
ZG215VN
TW
ZR
VM
CBZG107.cdr
ZG Control Unit
VM Servo motor
ZR Heating mixing valve
VF Flow sensor
TW Temperature selector
TTemperature limiter
PHeating circuit pump

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 transmit these 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 necessary change to the mixing ra-
tio between the heated supply water and the heating circuit’s retur-
ning cooled water.
TheTW temperature selector is used as remote control. By means
of the P2 selector knob the flow or supply temperature 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 independently from the control unit and protects the air hea-
ter against freezing.

Operating and Display Components
Pos.Function Basic Setting
BDay mode
CReduced mode
P1 Sensitivity 5
SOperating mode selector auto
L1 ”Hotter“ LED (red)
L2 ”Colder“ LED (green)
1Instructions compartment
2Heating curve diagram
3Basic Settings
4Reserve trip pins
5Inserted trip pins
6Timer (optional)
7Pointer for the current time
Settings on the Temperature Selector
P2 Selector knob 0
S1 Party switch auto

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 Bminus 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 the manu settings of the operating mode selector Sthere is no
LED display.

Putting into service
nSet the timer 6with the current time
nSet the operating mode selector Sto auto
The remaining basic factory settings are printed under 3on the
control unit.
Timer for reduced mode 6
With the aid of the timer, the room temperature during idle periods
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, blue pin 22:00.
nPull out the trip pin and insert it again at the desired
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 pin switches on day
mode, while the blue pin activates reduced mode.
In order to make sure that the rooms are heated well in the morning,
the heating system’s day mode should be activated between 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 capaci-
ty 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. If a (second) decrease in tempera-
ture is desired in the course of the day to
save energy, the program needs to be ex-
tended. Take the extra trip pins 4and
insert them at the desired time.
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 is prepared ex factory for the day program and, if required,
it can be changed to week program (see installation instructions).
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 Band Cof the controller.
Day mode (setting knob B)
The selecting range on the setting knob Bvaries from 0 to 100°C.
Normally the setting knob Bsets the desired target value for day
mode.
If a temperature selector is used as a
remote control, the setting knob Bis to be
set on 20.
Reduced mode (setting knob C)
By means of setting knob C, the intensity of the decrease to be ac-
tivated with the timer can be set. The setting range varies from 0 to
-100 K (°C). The decrease set with setting knob Crefers to the
temperature either on setting knob Bor on the TW.
nExample (without TW)
Setting on the setting knob Bè50
Setting on the setting knob Cè-20
i. e. for normal mode (day mode): constant target value of 50 °C,
for reduced mode (night) a target value of 30 °C.

nExample (with TW 23)
Setting on the setting knob Bè20
Setting on the TW 23’s selector knob P2 è50
Setting on the setting knob Cè-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 21A to 23A
When using a temperature selector the setting knob Bon the con -
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 21A – settable temperature range -15... + 15° C
TW 22A – settable temperature range 0… 30 °C
TW 23A – settable temperature range 20… 70 °C
If no temperature selector is available, the desired target value is to
be set on the setting knob Bof the control unit
Energy saving tip:
Set the operating mode selector Son .
The controller hence works constantly in reduced
mode.

Remote Control TF 22 (optional)
Setting the Room Temperature
On setting knob P2 the setting of the room temperature can be
fine tuned. The setting without the remote control is always 20 °C.
With the respective remote control another setvalue may be tuned.
The scale on the selector is divided from -7 to +7 and corresponds
more or less to the variation in degrees.
+èIncreasing the Room Temperature
–èLowering the Room Temperature
The values of the selector knob P2 and of the setting knob Bon
the control unit are added to the controllers basic setting of 20 °C.
With the controls TW 21A ... TW 23A it is possible to set other
control temperatures also.
P2
S1

Examples TF 22 TW 23A
Selector knob P2 -1 0+1+22021 2223
Room temp. [°C] 19 20 21 22 20 21 22 23
If no temperature selector is available, the desired room tempera-
ture can be set only on the setting knob Bof the control unit.
Party switch S1
The party switch at the temperature controller has no function
here.

Troubleshooting Checklist
nIs the heat generator at the required temperature?
èRead the heat generator’s thermometer.
nIs the burner ready?
Is the burner failure lamp on?
èIf necessary, press the reset button.
nWas the temperature selector set by mistake?
Setting of the selector knob P2
nCheck the setting of the control unit.
Setting knobs BCand operating mode selector S.
nIs the timer running? Is the displayed time correct?
èCheck the time and switch-on point.
If the problem still has not been solved after checking the settings,
position the setting knob Bon +7
The servomotor should now open the mixing valve and the red
LED L2 should light up. If this 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:
n1. Set the operating mode selector Son manu .
n2. Open the mixing valve by hand until the desired flow and
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 auto-
matic mode.

Behavior of the target values
during day and reduced mode
BC
BDay mode setpoint
Reduced mode
setpoint
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Instructions for the Technician (only!)
Removing the Timer
(see also the installation instructions)
Operating steps:
n1. Pull out the instructions case.
n2. Hold the timer by the two white stems and turn to the left
until the connector is released.
n3. Remove the timer.
(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 proportional range of the PD control unit.
Recommended basic setting: P1 è10.
In case of unstable regulation set higher values.

VF 20AVF20
LF20
Flow- and airflow-sensors