Warmup WSC-0115 User manual

™
The world’s best-selling electric floor heating brand
™
The world’s best-selling electric floor heating brand
SMART OUTDOOR HEATING CONTROL WSM-252W
SUBMITTAL SHEET WSC-0115
WARMUP INC.
USA: [email protected]
Tel.: [phone]
www.warmup.com
CANADA: [email protected]
Tel.: [phone]
www.warmup.ca
PRODUCT CODE
WSM-252W
PRODUCT DESCRIPTION
The new WSM-252W is the WiFi enabled version of the Warmup®
WSM-63 outdoor control panel. The addition of WiFi capability to this
control panel has three major benefits: no external sensors, remote
access via the app, and advance operation based on weather forecast
data. Once installed, the Warmup WSM mobile application can be
used to control the panel manually or automatically based off of local
weather forecast. For automatic control, simply set the probability
percentage you’d like for your system to activate or, enable push notifications so that the mobile application alerts
you of the activation with an option to override.
The WSM-252W control panel has two 63A/4-pole contacts that are designed to handle a load of up to 252 amps
at 2-phase. At 3-phase, the same control will handle a total capacity of 378 amps.
Operate WSM/WSMM snow melting installations outdoors
Enclosure NEMA 4
Relay 2 x 63A/4-pole relay contactor
100-600V relay voltage
Sensor 120V coil for optional sensor connections
Amps capacity Total capacity of 252 Amps at 240V/2-phase
Total Capacity of 378 Amps at 277V/3-phase
Approval UL-approved components (including WiFi Relay)
WiFi Voltage 120
SPECIFICATION
The WSM-252W controller must be mounted indoors. Despite its NEMA 4x enclosure, the device must be within
range of the home’s WIFI signal. To ensure the long life of electronics in the panel, avoid mounting locations with
outdoor exposure and moisture.
OPERATION
The panel can b operated manually via the Timer function. The timer can be set for a variety of periods. The default
is 1 cycle of 10 hours. Pressing the Timer button on the door of the enclosure starts the timer.
For optimal operation, download the free “WARMUP WSM” app for iPhone and Android devices. Create an account
and follow the instructions to connect your device.

™
The world’s best-selling electric floor heating brand
™
The world’s best-selling electric floor heating brand
SMART OUTDOOR HEATING CONTROL WSM-252W
SUBMITTAL SHEET WSC-0115
WARMUP INC.
USA: [email protected]
Tel.: [phone]
www.warmup.com
CANADA: [email protected]
Tel.: [phone]
www.warmup.ca
INSTALLATION DIAGRAM
WARRANTY
When installed according to the installation manual, the WSM-252W is covered with Warmup’s 1-year manufacturer
warranty.
TECHNICAL SUPPORT
Warmup is available 24/7/365 at [phone].
For quotes, layouts and specific technical information, contact us at:
Warmup USA
52 Federal Rd #1F, Danbury, CT 06810
[phone]
[email protected]
Warmup CANADA
[phone]
RELATED PRODUCTS
• WSM Snow Melting Cable - see WSC-0726
• WSMM Snow Melting Mat - see WSC-0729
Pre-wired timer
Set of two (2) 4-Pole
63A relays. Coil at
120V.
Note: snow sensors can be wired
into the WSM-252W but will occupy
a redundant place. The device will
first function based on WIFI signals,
or can be overwritten by the manual
Timer function.
External sensors bypass all the
above and are not recommended.

™
The world’s
best-selling electric floor heating brand
WSM-252W Instruction Manual
warmup.com | [phone]

Enclosure NEMA 1 for indoor
mounting
Relays Two (2) 64A/4P relays
with 120V
Switching Voltage 100-600 Volts
Amperage
MAX load bearing of
252A/240V at 2-phase
power and up to
378A/277V at 3-phase
power
Approvals
UL-approved components
assembled in UL 508
facility
Limitations
The device must be mounted indoors
and within reach of the dwelling’s WiFi
signal.
The WSM-252W is currently designed
to operate in-ground snow melting systems
and is not yet calibrated to operate roof
melting applications. While it can perform
that function, it is not yet updated with the
specic requirements of such applications
(run-off melting, etc).
The WSM-252W is specically
designed to work with the wattage output
of cables manufactured by Warmup Inc /
Warmup PLC. Warmup makes no guarantees
as to its suitability when used with non-
Warmup systems.
The Warmup WSM-252W is a WiFi-
enabled panel to operate your in-ground
snow melting system. The panel contains
load switching capabilities (up to 252
Amps/240V) and is triggered by the weather
forecast.
Although it has a manual power
button on the enclosure frame, the WSM-
252W is intended to operate automatically
and without the need for external sensors.
The device will monitor the weather forecast
several times per hour looking several hours
in advance (typically 2 hours). Once the
weather data matches trigger points set in
the parameters, the system will engage.
This allows the system to pre-heat
before the snow fall, making it signicantly
more prepared during heavy snow falls. It
will aim to get the outdoor slab to 50-55°F
before the precipitation event and thereby
prevent any accumulation of snow.
The system carries an internal manual timer
as well as app-based time settings. Please
refer to the below manual for complete
instructions.
Product Specications
Applications
The WSM-252W is intended to operate
Warmup’s WSM and WSMM snow melting
cables and mats in in-ground snow melting
applications.
Product Description

Wiring
The system requires two sets of
inbound power: 120V supply to power the
WiFi relay and coils on wiring terminals 1 &
3 and 240V supply power to the load side
of the relays to activate the snow melting
system (at 240V). Adjust inbound voltage
based on power requirement of WSM/
WSMM snow melting system.
While external snow sensors are not
required for the WSM-252W to operate
efciently, they can be wired as a back up to
terminals 5 and 6. The approved set up with
ETO2 or ASE-DS type outdoor sensors should
be supplied with 120V power to activate
the devices and eventually trigger the coils
(120V) to operate the system.
Do note that these sensors are redundant
to the WiFi operation of the system and
the set up is “either/or”. The device cannot
automatically switch from WiFi to wired
sensor-based activation. If you want to
install the sensors as a back-up but wish
to operate with the WiFi feature, simply
complete the wiring without actually tting
the terminations into poles 5 and 6 of the
wiring terminals.
(See wiring diagram at the end of this
manual)
Manual
You can activate your WSM-252W
manually by pressing the on/off button on
the door of the enclosure. This is accessible
to the user from the outside of the panel.
However, at initial set-up, the internal
timer should be set up with the desired
number of hours for the timer to function
upon being triggered by the ON/OFF button.
The timer can be set from 1 to 99
hours and Warmup defaults the timer at 1
period of 10 hours. We do not recommend
less than 5 hours for proper snow melting
results. This can be changed at any point by
the user.
When changing the settings of the
timer, you must rst disconnect power to the
whole unit, then change settings, then turn
power back on. This is not only for safety
reasons, but also because the timer requires
a power-cycle reset when its settings are
changed.
The manual operation of the system
can serve as an override to the WiFi
activation. This means that at any point,
the user can activate the system manually
without interrupting the regular operation
of the system using the WiFi signal and the
app’s parameters.
The breaker must be turned off before
adjusting the timer settings.
• Turn the top orange dial to 10h
• Turn the middle orange dial to .4 (or
however many hours you would like
to set the system to).
• Example: .4 = 4 hrs, .5 = 5 hours
• Bottom dial should be set to D mode
Activating your system

To activate yourWSM-252W automatically as it
was designed to be, you must rst download
the Warmup WSM application available in
your iOS or Android app store.
Upon download, verify that your system is
properly wired and powered so that it can
emit the necessary signals to your home’s
WiFi router. This signal will then be picked up
by your phone for the activation of the app.
With all that veried, open the app and
follow the prompts. You will need to key in
your WiFi’s “name” (SSID) and the password
to connect to it.
Once the connection is established, the
following step will be to connect your phone
with the WSM-252W.
To do that, go to your phone’s SETTINGS where
you can review the available WiFi signals.
Smartphone Application

A new signal will have appeared with the
format “Shelley-IOT-xxxx-xxxx” where the “x”
can be a series of numbers and letters.
Assuming it is the only WiFi signal starting
with Shelley-IOT… select it and let your phone
connect to it.
NOTE: newer versions of the WSM-252W have
a different relay and signal. If your WiFi relay
is a round blue box, a different, unique WiFi
signal will be emitted that may not look like
“Shelley…” but like “shelly1” instead
This will pair up your phone with the device.
You can repeat this operation with any other
phone.
Once it has connected to the Shelley network,
it will prompt you to return to the SETTINGS
of your phone and return to your home’s WiFi
network as it originally was. This is simply to
return your phone to its original set-up. The
temporary switch to the Shelley network
allowed the WSM-252W to pair up with your
phone specically and it will now link directly
with your home’s router.
Over the next few screens you will be guided
to set up your system and name it. It will
select your location if your phone allows it
in order to determine the exact location of
your device, and by extension your driveway
and snow melting system. This is important
as the weather forecast will be checked for
that location specically.

Default parameters have been preloaded for
a typical snow melting system. You can click
on the EDIT icon (pen and paper) of your snow
melting system and change the following:
EDIT NAME
If you wish to change the name of your
system you can do it here.
STARTING TRIGGER OR %PRECIPITATION
The weather forecast indicates the chances
for snow over the following several hours in
your area. Your device will trigger once the
probability is above the percentage identied
in your settings. We recommend 70-75%
probability, but a high % makes the system
less sensitive and a lower percentage makes
it more sensitive. This means that in areas
with fast-changing climates, you may want a
more sensitive system.
AHEAD START
As a default, the system will turn on 2 hours
prior to the forecasted precipitation event.
If your location requires more time, you can
change this here. You can simply let the
default setting run for a few snow falls and
adjust later on. If your wattage output is lower
than 50 watts/sqft (cables at 3” spacing) you
may need more than 2 hours to get your slab
to temperature prior to the snow fall. We
recommend setting this to 3 or 4 hours for
spacing of 4” (42w/sqft) or 5” (35w/sqft).

BELOW 0°F
It is recommended to not allow the system
to function when outdoor temperatures are
below 0°F / -18°C. This is because the power
required to heat the slab to 40°F is simply too
great and it is possible that the system may
not cope with the requirement. At least not
efciently. The default setting is to not allow
this, but you can force it ‘on’ here.
ABOVE 50°F
Similarly, we recommend letting the system
automatically power down if the outside
temperature reaches 50°F or more. This is
because at these temperatures, natural snow
melting occur and you may prefer to let nature
take its course rather than spending Kilowatts
to melt the snow. Leave on “Yes” if you would
like the system to turn off above 50°F.
ACTIVATION LENGTH (MAX. RUN TIME)
The system is pre-programmed to not
operate more than 24 hours. In the event
it is struggling to keep up with the weather
or some of your settings have called for it to
operate continuously, this safeguard prevents
the system to operate more than 24 hours at
a time. It is not recommended to turn this off.

Wiring diagrams
6 Terminal
7 Terminal

SUPPORT
6 Terminal with DS-2
Step 1
Step 2
Step 3
Step 4

SUPPORT
7 Terminal with DS-2
Step 1
Step 2
Step 3
Step 4

SUPPORT
Online
www.warmup.com
Technical Helpline
[phone]
6 Terminals with 4iE
Step 1
Step 2
7 Terminals with 4iE