C
Permanent
External
(1 & 2)
Indoor Sensor
Zone Control
13 14
Sen
RTU
2K10K
0.4
2.0
3.6
Heating Curve
Dem
R
12 3456
Mixing Control 354
Dem
10 11 12 15
Sen
Com
Sen
Com
Sw
UnO
16 17
Sen
Sup Out
150°F
100
Minimum
Boiler Return
Motor
Speed
Test
Do not apply power here!
24 V (ac) only
Boiler
Sen
Occupied
35
(2)
105
(41)
70°F
(21°C)
Unoccupied
35
(2)
105
(41)
70°F
(21°C)
Boiler enabled
10% open
H10712
Heat Demand
25% open
1
2
3
O
R
Boiler
Closing
Power
Heat Demand
WWSD
Unoccupied
Minimum Return
Maximum Supply
Floating Action
Heat Demand
18 19 20789
Mix
Com Opn
Cls
Mix Mix
Sen
Com
Sen
Ret
140 sec.
30 250Off
100°F
150
60
M
Opening
Power
24 V 50/60 Hz 3 VA
Pump Relay
1
2
0
V
(ac)
10 A 1/3 hp, pilot duty 240 VA 2 A
Boiler Relay
1
2
0
V
(ac)
10 A 1/3 hp, pilot duty 240 VA 2 A
Mix Relay
1
2
0
V
(ac)
6 A 1/4 hp, pilot duty 240 VA 2 A
Made in Canada by
tekmar Control Systems Ltd.
Pump
Heat Power
Max. Supply
190
Pump
Off
Jun 95
1234567
- Data Brochure
Mixing Control 354
D 354
08/95
Heating
is required
Operating Mode
selector switches
Test button and
LED to test main
control functions
24Vac power
supply is on
Terminal Plugs:
Power and out-
put connections
Occupied
temperature
setting
Control is
maintaining
Maximum Supply
Unoccupied
temperature
setting
Terminal Plug:
Sensor and
timer input
Heating Curve
setting
Input: Supply
Universal Sensor 071
Included
Outdoor Reset Strategy. . pg. 2 Testing . . . . . . . . . . . . pg. 9
Sequence of Operation . . pg. 3 Error Messages . . . . . pg. 11
Installation . . . . . . . . . . . . pg. 5 Technical Data . . . . . . pg. 12
Settings . . . . . . . . . . . . . . . pg. 8 Limited Warranty . . . . pg. 12
Input:
Heat Demand
signal
Input: Indoor
Sensor 074
Output:
Turn on boiler
24Vac
power
supply
Output: Turn on
pump
Output: Open / Close
Mixing Valve
Input: Return
Sensor 071
System is in
Warm Weather
Shut Down
System is
switched to
Unoccupied
Control is
maintaining
Minimum Return
Valve is opening
Valve is closing
Minimum Boiler
Return tempera-
ture setting
Actuating
Motor Speed
setting
Maximum Supply
temperature
setting
Input: 2k RTU
Mixing Control 354
Power
Heat Demand
WWSD
Unoccupied
Min. Return
Max. Supply
Boiler
Occupied
35
(2)
105
(41)
70°F
(21°C)
Unoccupied
35
(2)
105
(41)
70°F
(21°C)
Closing
Opening
Floating Action
Pump
The tekmar Mixing Control 354 is a microprocessor-based control with a floating action output
intended to operate a mixing valve. This valve regulates the supply water temperature to a heating
system based on the outdoor air temperature, and optionally, the indoor air temperature. The
pump is shut down and the valve is closed when there is no Heat Demand signal or when the
outdoor temperature is warm enough so that the system no longer requires heat (WWSD). The
pump runs continuously when a zone control is selected. Maximum supply temperature and
minimum boiler return temperature can be constrained for protection of system components.
Boiler is on
Pump is on
Input: Unoccupied
signal. or
Timer 030
Input: Outdoor
Sensor 070
Included
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