NEST thermostat ADAPTER 22

NEST thermostat ADAPTER
v.3
22

If you have device which cannot be controlled with 24V AC power supply, and can’t be
connected directly to NEST thermostat, NEST thermostat adapter allow you to connect NEST
thermostat to any two devices which can be activated with closing circuit which doesn’t
exceed 220V and 1A power consumption.
With NEST thermostat ADAPTER is easy and simple to connect your NEST thermostat to any devices
which isn’t suitable to regulate with 24V DC power supply.
It has possibility to connect maximum of two separate devices. If you need more devices to control
just by another ADAPTER.
If your devices consume more power than ADAPTER relay output can provide (220V, 1A) you can add
additional relay corresponding power consumption.
If you aren’t familiar with wiring and electrical connection, please ask help of professional.
Technical specification of NEST thermostat ADAPTER
Power input: 220V AC, 2.4W, max 1.5mm² wire
Power output: 24V AC, 0.1A, max 0.5mm² wire
REL output: 2 x 220V, 1A, max 0.5mm² wire
Dimension: 88x34x52mm
For terminal connector screw use 2,0x40 screwdriver
Allow you to connect 2 NEST thermostat controlling
output.
Connection diagram
N/L
Rh
C
Y1
input 220V AC connection
Connect to NEST Rh connector (or Rc), provides 24V AC power supply to NEST
Connect to NEST C connector, provides 24V AC power supply to NEST
Connect to NEST any output connector you wish to use. It activates REL Y1 output
If used for heating, connect it on Y1 NEST connector, and REL Y1 connect to cooling unit activation
W1
Connect to NEST any output connector you wish to use. It activates REL W1 output
If used for heating, connect it on W1 NEST connector, and REL W1 connect to heating unit activation
REL Y1 NO (normal open) relay output (max. 220V AC, 1A) for activation any desirable devices
When NEST activate Y1 input REL output is shorted (closed)
REL W1 NO (normal open) relay output (max. 220V AC, 1A) for activation any desirable devices
When NEST activate W1 input REL output is shorted (closed)
LED explanations
POW (green) LED:
No light
check 220V AC
Light
220V AC exist
Light bright
NEST connected properly
Light brightest short circuit on NEST connection wires (C, Rh)
OUTPUT LED:
Light RED
W1 input/output activated
Light YELOW
Y1 input/output activated
Connection diagram, option with heating/cooling and heating/additional heating
220VAC
220VAC
N
N
L
POW
LED
L
POW
LED
NEST
thermostat
adapter
NEST
thermostat
adapter
R
REL REL Y W
Y1 W1 1 1 C h
R
REL REL Y W
Y1 W1 1 1 C h
cooling
activation
aditional
heater
heating
activation
heating
activation
Connection detection on NEST thermostat
Wires present on Rc and C terminal,
but here is no any (or appropriate)
power supply connected.
Wires present on Rc, C and W1 terminal.
Only on W1 is equipment detected.
There is no power supply.
Wires present on Rc, C and W1 terminal.
Appropriate power on RC and C detected.
On W1 heating equipment detected.
R
REL REL Y W
Y1 W1 1 1 C h
NEST
thermostat
adapter
POW
LED
VAILANT ecoTEC plus (612/615/618/624/824/pro24…) example connection
Security system – automation – acoustic – multimedia / design – sales –installation –maintenance – service
KBZ ELEKTRONIC d.o.o. Trnjanska cesta 117, 10000 Zagreb, Croatia, Establish: 1992.god.
Web: www.kbz-electronic.com , Mail: [email protected]

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