Winland Electronics MTA-1 User Manual

Mta-1, Items needed, 1 – opening the case

background image

© 2012 Winland Electronics, Inc.

D-011-0104 Rev C (08/2012)


Mechanical Temperature Monitoring



This package contains:

• 1 MTA-1
• 2 Mounting Screws and 2 anchors
• 1 Installation/Operating Instructions Guide



Power Requirement

No power required to operate.

Operating Temperature

Alarm Use: 50 to 100° F (10 to 38° C)

Non-condensing environments only.

Alarm contacts may not function outside of this range.

Display Use: 30 to 100° F (-1 to 38° C)

Low Limit Adjust Range

30 to 90° F (-1 to 32° C)

High Limit Adjust Range

40 to 100° F (4 to 38° C)


±3° F (1.7° C)

Response Time

TC = 14 minutes

Sensing Element

Bimetallic Coil


Gold plated N.O. dry contacts

Contact Output Rating

50mA @ 12VDC


12 oz (340 g)


4.5 x 3.25 x 1” (11.4 x 8.3 x 2.5 cm)


Key slot

Case Material



1 Year Limited



In specifying the location and number of Temp˚Alerts® to install consider room size,
effectiveness of the ventilation system, and critical non-condensing (indoor only) environment
monitoring areas. If the building already has an energy management system, an easy rule
of thumb to follow is to install the MTA-1 near each thermostat. It should be mounted on a
wall or other vertical surface in the area where temperature is to be monitored. Make sure it
is well clear of windows, doors, or heat sources that could cause an inaccurate reading of air
temperature. When protecting a building against freeze damage, always install at least one
Temp˚Alert® on every level of the home or business.



Items needed:

• Standard screwdriver
• 5/16” wrench or nut driver
• 22-18 AWG twisted pair

1 – Opening the Case

Begin with the device facing you. Turn the device 90˚ to the right to expose the left end of
the case. Notice the left end of the base plate has been tooled with a single attachment hole
whereas the right end has not. Grasp the device with your right hand, position your thumb
on the center of the left end of the device above the seam with your remaining fingers on the
right end of the device (See Figure 1). Press hard with your thumb to disengage the latching
pin. Separate the two halves by pulling the device away from the base plate.

2 – Attach Base Plate to Mounting Surface

After you have determined a location for the device to be mounted, position the base plate of
the device on the mounting surface with your hand and mark the center point of the mounting
holes with a pen or other marking device. Mount the base plate to the wall using the included
mounting screws. Depending on the type of surface you are mounting to, you may need to
predrill holes to accept the mounting screws alone, or the plastic anchors and mounting

3 – Select the High and Low Set Points

Each limit post is controlled by a locknut. Use a 5/16” nut driver or wrench to loosen (turn
counter clockwise) the high and low adjustment posts (See Figure 2). After loosening, slide
the posts to the proper temperature setting. Once the posts are in the proper setting locations,
simply retighten the lock nuts (turn clockwise). Avoid over tightening of the locknut.

4 – Making the Wiring Connections

To complete the installation, use three conductor stranded or solid wire to connect the MTA-1
to a control panel, dialer, etc. See Figure 3 for an example of a standard installation that utilizes
differentiated notification outputs for high and low temperature occurrences. If desired, the
HI limit wire and LOW limit wire may be connected together under a single zone. This is useful
whenever a limited number of open zones are available and you do not wish to differentiate
between a high and low temperature notification.

5 – Attach Front Cover to Base Plate

Grasp the device with your right hand by positioning your thumb on the center of the left end
of the device above the locking pin and positioning your remaining fingers on the right end of
the case (See Figure 1). Align the retaining tabs on the right edge of the case with the holes on
right edge of the base plate currently attached to the mounting surface. Press hard with your
thumb on the left end of the device and swing the device back toward the base plate until the
device seats properly into the base plate and the locking pin engages.

To open the case, squeeze
firmly with your thumb
and pull front face plate
away from the back plate.

Figure 1

Figure 2

View with Back
Cover Removed

Diagram shown above will activate Zone 1 if the high
limit is exceeded and Zone 2 if the low limit is exceeded.

Figure 3

Tech Support 8:00am - 5:00pm Central Time

(800) 635-4269 • +1-507-625-7231 P

See testing procedure.