tekmar 361 User Manual
- Data Brochure
D 361
Mixing Control 361
03/09
The Mixing Control 361 is designed to control the supply water temperature to a hydronic system in order to provide outdoor reset or
setpoint operation. The control uses a variable speed injection pump to regulate the supply water temperature, while protecting the
boiler against flue gas condensation. The control has a Liquid Crystal Display (LCD) to view system status and operating information.
Additional functions include:
• Quick Setup for easy installation and programming of control
• User comfort adjustment to increase or decrease building
space temperature
• Advanced settings to fine-tune building requirements
• Boiler Control for improved energy savings
• Optional indoor sensor for room air temperature control
• Test sequence to ensure proper component operation
• Setback input for energy savings
• 120 V (ac) power supply
• CSA C US certified (approved to applicable UL standards)
• Powered mixing system pump output
30% Enable
Note:
Mixing demand must be
powered with 20 to 260
V (ac) before pumps will
operate or the boiler is
able to fire.
MIX
OCC
Terminal
Unit
Item
Mixing Control 361
Variable Speed
2 3 4
1
Power
Mixing
Demand
L
N
VIEW
70 90
503010
% Out
5 6 7 8
Sys
Pmp
N
Pmp
Var
F
°
Mixing
Demand
N
To increase or decrease the
building temperature:
Item
Press the
simultaneously for 1 sec. to
enter the
Use the , buttons to
adjust the
Display defaults back to
menu after 20 sec.
ADJUST
ROOM
910
Boiler
, , buttons
menu
setting
VIEW
C US
11 12 13 14 15 16 17
UnO
Sw
Advanced
Installer
Test
Made in Canada by
tekmar Control Systems Ltd.
tektra 913-01
Power:
Variable Pump:
Relays:
Demand:
Do not apply power
Com
Boil
Return
Boiler Sensor
Supply
10% Enable
Installer Instructions
ROOM
- Set to desired room temp.
OUTDR DSGN
- Set to coldest (design)
outdoor temp.
Terminal Unit Set to
High Mass Radiant
Low Mass Radiant
Fan Coil
Convector
Radiator
Baseboard
Refer to brochure for more information
120V + 10% 50/60 Hz 1650 VA
240V (ac) 2.4 A (FLA) 5 A (LRA), fuse T2.5 A
240V (ac) 10 A 1/3 hp
20 to 260 V (ac) 2 VA
Out
Indr
Signal wiring must be
rated at least 300V.
Mix
Com
1
2
3
4
5
6
Meets Class B:
Canadian ICES
FCC Part 15
Date Code
H1188D
Mixing Demand
120 V (ac) Power
Input
Signal
Input
Supply
Output
Mixing System
Pump
Output
Variable Speed
Driven Pump
Output
Boiler
Input
tekmar Timer
Optional
Input
Universal Sensor
Included
Input
Universal Sensor
Included
Copyright © D 361 - 03/091 of 20
Input
Indoor Sensor
Optional
Input
Outdoor
Included
Sensor
How To Use The Data Brochure
This brochure is organized into four main sections. They are: 1)
Troubleshooting
Sequence of Operation
of the
that apply to your installation. For quick installation and setup of the control, refer to the
followed by the
The
Control Settings
displayed by the control. The control functions of each adjustable item are described in the
Sequence of Operation
. The
, as this contains important information on the overall operation of the control. Then read the sub-sections
Quick Setup
section.
section (starting at
section has three sub-sections. We recommend reading
DIP Switch Settings
Sequence of Operation
) of this brochure, describes the various items that are adjusted and
, 2)
Installation
Table of Contents
User Interface .............................................. pg 2
Description of Display Elements ............... pg 3
Sequence of Operation ...............................pg 4
Section A: General Operation .........
Section B: Mixing .............................
Section C: Boiler Operation
Installation ................................................. pg 10
DIP Switch Settings................................... pg 14
............. pg 8
pg 4
pg 5
Quick Setup .............................................. pg 14
Control Settings ....................................... pg 15
View Menu
Adjust Menu
Testing and Troubleshooting .................. pg 17
Error Messages
Technical Data .......................................... pg 20
Limited Warranty ...................................... pg 20
Installation
section,
Sequence of Operation
...................................... pg 15
................................... pg 16
............................. pg 19
Control Settings
, 3)
Section A: General Operation
DIP Switch Settings
.
, and 4)
section,
Reference Material: Essay E 003 “Characterized Heating Curve and Reset Ratio”
Essay E 021 “Mixing Methods and Sizing of Variable Speed Injection Pumps”
User Interface
The 361 uses a Liquid Crystal Display (LCD) as the method of supplying information. You use the LCD in order to set up and monitor
the operation of your system. The 361 has three push buttons (
your control, record your settings in the ADJUST menu table which is found in the second half of this brochure.
Item
The abbreviated name of the selected item will be displayed in the item field of the
display. To view the next available item, press and release the
have reached the last available item, pressing and releasing the
the display to the first item.
Adjust
To make an adjustment to a setting in the control, press and hold simultaneously for 1
second, all three buttons. The display will then show the word ADJUST in the top right
corner. Then select the desired item using the
button to make the adjustment.
To exit the ADJUST menu, either select the ESC item and press the
seconds.
When the
Item
button is pressed and held in the VIEW menu, the display scrolls through all the adjust items in both access levels.
Item
Item
, ,) for selecting, viewing, and adjusting settings. As you program
Item
button. Once you
Item
button will return
button. Finally, use the
or button, or leave the adjustment buttons alone for 20
and / or
Item
Item
Additional information can be gained by observing the status field and pointers of the LCD. The status field will indicate which of the
control’s outputs are currently active. Most symbols in the status field are only visible when the VIEW menu is selected.
Copyright © D 361 - 03/09 2 of 20
Display
Item Field
Displays an abbreviated
name of the selected item
OUTDR
BOIL
MIX
ROOM WWSD
INDR
Terminal
Unit
Status Field
Displays the current
status of the control’s
inputs, outputs and
operation
DSGN
TARGET
MAXMIN
UNOCC
Item
DIFF
3010 7050
% Out
Number Field
Displays the current value of
the selected item
VIEW
90
ADJUST
Demand
°
F
°
C
Mixing
Menu Field
Displays the
current menu
Buttons
Selects Menus, Items and
adjusts settings
{
Symbol Description
Pump
Displays when the mixing system pump is in
operation.
Burner
Displays when the boiler relay is turned on.
OCC
Occupied Schedule
Displays when the control is in occupied (Day)
mode.
UNOCC
°
F, °C
Unoccupied Schedule
Displays when the control is in unoccupied
(Night) mode.
°F, °C
Displays the unit of measure that all of the
temperatures are to be displayed in the control.
Pointer
Displays the control operation as indicated by
the text.
Copyright © D 361 - 03/093 of 20
Sequence of Operation
% Out
Current output of variable
speed injection pump
3010 7050 90
Mixing
sensor
Boiler return
sensor
Boiler supply
sensor
or
Section A
General Operation
Page 4-5
Section B
Mixing
Page 5-8
Section C
Boiler Operation
Page 8-9
Section A —General Operation
POWERING UP THE CONTROL
When the Mixing Control 361 is powered up, the control displays the control type number in the LCD for 2 seconds. Next, the software
version is displayed for 2 seconds. Finally, the control enters into the normal operating mode.
OPERATION
The 361 uses a variable speed injection pump to control the supply water temperature to a hydronic system. The supply water
temperature is based on either the current outdoor temperature, or a fixed setpoint.
Outdoor Reset
When the outdoor design (OUTDR DSGN) setting is not set to OFF, the
361 calculates a mixing supply temperature based on the outdoor air
temperature. The 361 uses a
optionally indoor temperature feedback from an indoor sensor in this
calculation.
Characterized Heating Curve
and
Terminal Unit
Indoor Design
Design Supply
Outdoor Design
Setpoint Control
When the outdoor design (OUTDR DSGN) setting is set to OFF, the
361 supplies a fixed mixing supply temperature equal to the MIX
TARGET setting. An outdoor sensor is not required during this mode
of operation.
VARIABLE SPEED
A standard wet rotor circulator is connected to the 361 on the
and 8). The 361 increases or decreases the power output to the circulator when there is a
mixing demand. The circulator speed varies to maintain the correct mixed supply water
temperature at the mix sensor. For correct sizing and piping of the variable speed driven
circulator, refer to essay E 021. A visual indication of the current variable speed output is
displayed in the LCD in the form of a horizontal bar graph.
BOILER PROTECTION (BOIL MIN)
The 361 is capable of providing boiler protection from cold mixing system
return water temperatures. If the boiler sensor temperature is cooler than
the BOIL MIN setting while the boiler is firing, the 361 reduces the output
to the variable speed injection pump. This limits the amount of cool return
water to the boiler, and allows the boiler temperature to recover. This
feature can only be used if a boiler sensor is installed.
Var Pmp
and N terminals (7
Decreasing Outdoor Temperature
Increasing Water Temperature
Copyright © D 361 - 03/09 4 of 20
EXERCISING
The 361 has a built-in exercising function. If a pump has not been operated at least once every 3 days, the control turns on the output
for 10 seconds. This minimizes the possibility of a pump seizing during a long period of inactivity. While the control is exercising, the
Test
LED flashes.
Note:
The exercising function does not work if power to the control or pumps is disconnected.
SETBACK (UNOCCUPIED)
To provide greater energy savings, the 361 has a setback capability. With setback, the
supply water temperature in the system is reduced when the building is unoccupied. By
reducing the supply water temperature, air temperature in the space may be reduced even
when thermostat(s) are not turned down. Any time the
terminals are shorted together, the control operates in the unoccupied (Night) mode. When
in the unoccupied (Night) mode, the UNOCC segment is displayed in the LCD. The 361
adjusts the supply water temperature based on the UNOCC settings made in the control.
This feature has no effect when the control is used as a setpoint control.
FACTORY DEFAULTS
The control comes preset with several factory defaults. These defaults are based on the terminal unit selection (see section B2). To
fine-tune building requirements, these defaults may be changed. If a factory default value for a terminal unit is changed, the terminal
unit number will flash when selected in the ADJUST menu.
To reload the factory defaults listed in section B2, power down the control and wait for 10 seconds. Power up the control while
simultaneously holding the
flashing.
12
11
UnO
Com
Sw
UnO Sw
(11) and the
Com
(12)
Timer Switch
Item
and buttons. The terminal unit number should now be displayed constantly in the LCD rather than
Section B: Mixing
Section B1
General
Section B2
Installer
Section B3
Advanced
Section B1: General
MIXING DEMAND
A mixing demand is required in order for the 361 to provide heat. A mixing demand is
generated by applying a voltage between 24 and 240 V (ac) across the
terminals (1 and 2). Once voltage is applied, the
LCD. If the 361 is not in WWSD, the 361 closes the
a MIX TARGET supply temperature based on the outdoor air temperature and settings. If
required, the 361 operates the boiler in order to provide heat to the variable speed injection pump.
SYSTEM PUMP OPERATION (
The system pump contact (
pump segment is displayed in the LCD. After the mixing demand has been satisfied, the 361 continues to operate the system pump for
20 seconds. This allows some residual heat to be purged out to the heating system. During WWSD, the system pump is operated based
on the exercise function.
INDOOR SENSOR
An indoor sensor may be used in order to provide indoor temperature feedback. The indoor sensor is connected to the
terminals (15 and 17). In addition, power must be applied to the
DEMAND section. With the indoor sensor connected, the 361 is able to sense the actual room temperature. Indoor temperature
feedback fine-tunes the supply water temperature in the mixing system to maintain room temperature. To adjust the room temperature,
use the ROOM OCC or ROOM UNOCC setting in the ADJUST menu at the control.
If a multiple zone system is used with an indoor sensor, proper placement of the indoor sensor is essential. The indoor sensor should
be located in an area which best represents the average air temperature of the zones.
1
Mixing
Demand
Sys Pmp
Sys Pmp
Mixing Demand
Mixing Demand
Sys Pmp
)
, terminal 5) closes whenever there is a mixing demand and the 361 is not in WWSD. The system
pointer is displayed in the
contact. The 361 calculates
24 to 240 V (ac)
Com
and
Mixing Demand
terminals (1 and 2) as described in the MIXING
2
Indr
Copyright © D 361 - 03/095 of 20
CHARACTERIZED HEATING CURVE
When used as a mixing reset control, the 361 varies the supply water temperature based on the outdoor air temperature. The control
takes into account the type of terminal unit that the system is using. Since different types of terminal units transfer heat to a space
using different proportions of radiation, convection and conduction, the supply water temperature must be controlled differently. Once
the control is told what type of terminal unit is used, the control varies the supply water temperature according to the type of terminal
unit. This improves the control of the air temperature in the building.
MIXING TARGET TEMPERATURE (MIX TARGET)
When used as a mixing reset control, the MIX TARGET temperature is calculated from the
Characterized Heating Curve
settings,
outdoor air temperature and optionally, indoor air temperature. When used as a setpoint control, the installer sets the MIX TARGET
temperature. The control displays the temperature that it is currently trying to maintain as the mixing supply temperature. If the control
does not have a mixing demand, “- - -” is displayed as the MIX TARGET.
Section B2: Installer
OUTDOOR DESIGN (OUTDR DSGN)
The OUTDR DSGN is the outdoor air temperature that is the typical
coldest temperature of the year where the building is located. This temperature is used when doing heat loss calculations for the building. If a
cold outdoor design temperature is selected, the mixing supply temperature rises gradually as the outdoor temperature drops. If a warm
outdoor design temperature is selected, the mixing supply temperature
rises rapidly as the outdoor temperature drops.
SETPOINT OPERATION (MIX TARGET)
For setpoint operation, set the OUTDR DSGN to OFF. The MIX TARGET becomes the setpoint supply temperature that the control is to
maintain. The MIX TARGET temperature is set by the installer in the
ADJUST menu. An outdoor sensor is not required during this mode of
operation.
ROOM OCC & UNOCC (ROOM)
The ROOM is the desired room temperature for the mixing zones, and
it provides a parallel shift of the
temperature desired by the occupants is often different from the design
indoor temperature (MIX INDR). If the room temperature is not correct,
adjusting the ROOM setting increases or decreases the amount of heat
available to the building. A ROOM setting is available for both the occupied (Day) and unoccupied (Night) modes.
Characterized Heating Curve
MIX DSGN
cold
OUTDR
DSGN
warm
Increasing Water Temperature
Decreasing Outdoor Temperature
. The room
Increasing Water Temperature
MIX INDR
A
u
t
c
m
e
T
l
a
N
ROOM
MIX INDR
.
p
n
g
i
s
e
D
l
a
m
r
o
Decreasing Outdoor Temperature
TERMINAL UNITS
When using a
shape of the
E 003). The 361 provides for selection between six different terminal unit types: two types of radiant floor heat, fancoil, fin-tube
convector, radiator and baseboard. When a terminal unit is selected, the control automatically loads the design supply temperature
(MIX DSGN), maximum supply temperature (MIX MAX) and minimum supply temperature (MIX MIN). The factory defaults are listed
below. To change defaults, refer to section B3. If a default has been changed, refer to section A to reload the factory defaults.
Terminal Unit
MIX DSGN
MIX MAX
MIX MIN
Copyright © D 361 - 03/09 6 of 20
Characterized Heating Curve
Characterized Heating Curve
High Mass Radiant
Low Mass Radiant
(1)
120°F (49°C)
140°F (60°C)
140°F (60°C)
160°F (71°C)
OFF
, the control requires the selection of a terminal unit. The terminal unit determines the
according to how the terminal unit delivers heat into the building space (refer to Essay
(2)
OFF
Fancoil
(3)
190°F (88°C)
210°F (99°C)
100°F (38°C)
Fin-tube Convector
(4)
180°F (82°C)
200°F (93°C)
OFF
Radiator
(5)
160°F (71°C)
180°F (82°C)
OFF
Baseboard
(6)
150°F (66°C)
170°F (77°C)
OFF
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