Time clock tekmarnet, 4 communication – tekmar 284 Boiler Control User Manual

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A Watts Water Technologies Company

Schedule Type

Day

24 Hour

5-2

5-11

7 day

Saturday

•

Sunday

•

Monday

•

Tuesday

•

Wednesday

•

Thursday

•

Friday

•

Events / Day

The events / day can be either 4 or 2. An event is a time at
which the control changes the target temperature. The event
time can be set to the nearest 10 minutes. If you wish to have
the thermostat skip the event, enter “--:--“ as the time. The “--:--“
time is found between 11:50 PM & 12:00 AM. See the table,
Events / Day, for more details regarding types of events.

Events / Day

Event

24Hr

Sat

Sun

Mon

Tue

Thu

Fri

4 events per day

Occupied 1

6:00 AM

UnOccupied 1

8:00 AM

Occupied 2

6:00 PM

UnOccupied 2

10:00 PM 10:00 PM 10:00 PM 10:00 PM 10:00 PM 10:00 PM 10:00 PM 10:00 PM

2 events per day

Occupied

6:00 AM

Unoccupied

10:00 PM 10:00 PM 10:00 PM 10:00 PM 10:00 PM 10:00 PM 10:00 PM 10:00 PM

The control has a built-in time clock to allow the control to operate on a schedule. A battery-less backup allows the control to
keep time for up to 4 hours without power. The time clock supports automatic adjustment for Daylight Saving Time (DST) once
the day, month, & year are entered. Use the Time menu to set the correct time, day, month, & year.
The Setback / Off DIP Switch must be set to Setback before the Time menu can be accessed.

Time Clock

tekmarNet

4 Communication

The 284 can communicate with tekmarNet

Thermostats, Wiring

Centers & Setpoint Controls to maximize system efficiency &
comfort. The 4 tN4 bus connections on the 284 use the boil
water temperature. No mix temperatures are available to the
284. tekmarNet

Thermostats enable the Indoor Temperature

Feedback feature on the 284. This allows water temperatures
to be adjusted to compensate for both indoor & outdoor tem-
peratures. Each bus can include up to 24 devices, providing
a total of 96 on the tekmarNet

network.

Cycle Length Setting in Adjust Menu (tN4) -------

-------

The control includes an adjustment for the cycle length. The
cycle length adjustment allows for synchronization of tN4 zones.
An Auto setting allows for the cycle length to be automatically
calculated to balance equipment cycling & comfort.
In the tekmarNet

4 system, all of the tekmarNet

4 Thermostats

determine the best cycle length for their zone. The thermostats
look at trying to maintain the longest possible cycle length while
keeping temperature swings to a minimum. The Thermostats
do this every cycle & send their ideal cycle length time to the
284. In order to operate the system as efficiently as possible, all
of the zones must operate based on the same cycle. In order to
do this, the 284 listens to all of the cycle length requests from
all of the tekmarNet

4 Thermostats. The 284 then determines

the average cycle length & sends this information to all of the
tekmarNet

4 Thermostats, allowing them to operate on the

same cycle.

Indoor Temperature Feedback (tN4) --------------

--------------

Indoor feedback applies when the 284 is connected to a
tN4 Thermostat network operating on a boiler bus. Indoor
temperature feedback fine tunes the water temperature of the
system based on the requirements of the thermostats. Each
thermostat tells the tN4 System Control the water temperature
that it requires to heat its zone.

Device Count (tN4) -------------------------------

-------------------------------

The control includes a device count of all the tN4 devices
connected to each of the four buses. This item is always
found in the Toolbox Menu called BUS(#) DEV. Use this to
confirm that the correct number of devices are connected
to the boiler bus.

Scenes -------------------------------------------

-------------------------------------------

The 284 will respond to the following tekmarNet

scenes:

Scene Response

Occupied or Schedule

Away, operates Room at 62°F (16.5°C) & there
is no DHW heating

Permanent Unoccupied

Occupied or Schedule

Temporary 3 hour Occupied