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- Data Brochure

Zone Control 368

D 368

09/96

The Zone Control 368 is a microprocessor-based energy management control that uses PID
logic to control the temperature in up to 4 heating zones. Multiple zone controls can be
connected together for additional zones of heating. Either single stage or two stage zones can
be provided by the control. The 368 is primarily designed for use with the tekmar House
Controls. When connected to a House Control, the 368 provides indoor temperature feedback
that adjusts the supply water temperature in order to satisfy the zone with the highest heat
load.  The 368 also coordinates the zoning operation in order to minimize boiler short cycling
and allow boiler purging between cycles. The 368 has a built in night setback timer and an
Optimum Start / Stop feature that allows the control to reheat the zones before the end of the
setback period.

Control Strategy . . . . . . . . . . . . . . . .

pg. 2

Testing the Control  . . . pg. 9

Sequence of Operation . . . . . . . . . .

pg. 3

Error Messages . . . . . . pg. 11

Installation  . . . . . . . . . . . . . . . . . . . .

pg. 6

Technical Data . . . . . . . pg. 12

Settings . . . . . . . . . . . . . . . . . . . . . . .

pg. 8

Limited Warranty . . . . . pg. 12

Zone Control 368

One & Two Stage

H1

144 1

Made in Canada by
tekmar Control Systems Ltd.

N

3

4

Power

L

8

9 10 11

Power
Pump Relay
Zone Relays

120 V 50/60 Hz 5 VA
120 V (ac) 6 A 1/3 hp, pilot duty 240 VA
120 V (ac) 6 A 1/3 hp, pilot duty 240 VA

Sep 96

31000266

20

19

Do not apply power here

17 18

70

°

F

(21

°

C)

40
(4)

100
(38)

UnOccupied

5

6

7

LR 58223

N R T L / C

R

Occupied

Optimum Start / Stop

UnOccupied

Timer Active

24 hr. Timer

0

12 hrs.

24

6

18

• Dial the desired duration of the
UnOccupied period.
• Press start button at the time of day
you want the UnOcc. period to begin.
Timer Active light turns on.

Start

12 13 14

Com

Sen

RTU

1

RTU

2

Com

Sen

UnO

Sw

Zo

In

Com

Sen

16

15

Caution: Signal wiring must be rated at least 300V

UnOccupied

Duration

0 = always Occupied
24 = always UnOccupied

M

M

M

M

PRGM

S

T I M E

AMPM

UNOCC

OVR

S

M

W T F

T

1
2

LR 58233

E150539

70

70

Power

Heat Required

Zone 2 / Hi stage

Zone 1 / Lo stage

2

3

4

1

Zone 4 / Hi stage

Zone 3 / Lo stage

Zo

Out

RTU

3

RTU

4

3-4

Com

3

4

1-2

Com

1

2

70

70

LR 58233

E150539

Test

Off

Optimum Start

Thermal Motor

Zone

Occ/UnOcc

1

3

2

Occ. only

4

System Pump

Pmp

1

2

System

Pmp

Input

120 V (ac)

Power

Supply

Input

tekmar Zone

Control

Input

 tekmar RTUs

or Indoor

Sensors

Outputs

Zone Valves or

Zone Pumps

Input

tekmar

Timer

Output

tekmar Reset

Control

Output

System

Pump

Outputs

Zone Valves or

Zone Pumps

Zone Control 368

One & Two Stage

Power

Heat Required

Zone 2 Hi stage

System Pump

24 hr. Timer

• Dial the desired duration
of the UnOccupied period.
• Press start button at the time of day
you want the UnOcc. period to begin.
Timer Active light turns on.

Start

UnOccupied

Duration

0 = always Occupied
24 = always UnOccupied

Zone 1 Lo stage

2

3

4

1

Zone 4 Hi stage

Zone 3 Lo stage

70

°

F

(21

°

C)

40
(4)

100
(38)

UnOccupied

Occupied

Optimum Start / Stop

UnOccupied

Timer Active

0

12 hrs.

24

6

18

LR 58223

N R T L / C

R

Содержание Tekmar Zone Control 368

Страница 1: ...8 70 F 21 C 40 4 100 38 UnOccupied 5 6 7 LR 58223 NR T L C R Occupied Optimum Start Stop UnOccupied Timer Active 24 hr Timer 0 12 hrs 24 6 18 Dial the desired duration of the UnOccupied period Press s...

Страница 2: ...eat can be supplied to the room on the coldest day of the year without requiring that the room be cold Derivative D In order to speed up the control s response to quick changes in the heating load der...

Страница 3: ...ulationsonindoortemperatureonly Iftherearelargevariationsinoutdoor temperature this method cannot provide the same level of accuracy as when both indoor and outdoor sensors are used Optimum Start Stop...

Страница 4: ...relay is then turned on and its on time is increased as the load increases When the heating load decreases again the on time of the Hi stage relay is reduced until the Hi stage relay is turned off co...

Страница 5: ...cupied mode the UnOccupied light is turned on and the UnOccupied dial is used to set the desired temperature within the UnOccupied zones Note If the RTU dial for an UnOccupied zone is set below the Un...

Страница 6: ...ng hardware and conduit fittings Before removing the knockouts check the wiring diagram and select those sections of the chamber with common voltages Do not allow the wiring to cross between sections...

Страница 7: ...RTU 3 and RTU 4 If the common block is used for a Two Stage heating zone connect the RTU or Indoor Sensor to terminals Com Sen RTU 4 8 and 10 Output Connections System Pump Connect the live L side of...

Страница 8: ...plied by the manufacturer If a zone pump or valve is connected to the terminals Com 1 2 2 15 and 17 follow a similar procedure as described above for the zone 1 relay If a zone pump or valve is connec...

Страница 9: ...ic motor zone valves or zone pumps are used the DIP switch must be set to Off Testing the Control Functions STEP SEVEN OPERATIONAL TEST OF CONTROL FUNCTIONS The Zone Control 368 has a test routine whi...

Страница 10: ...g system is turned off during the final stages of the Occupied period Timer Active The timer is set to enter the UnOccupied mode every 24 hours at the time of day the Start button was pressed STEP EIG...

Страница 11: ...m Start Stop UnOccupied Timer Active Power Heat Required Occupied Optimum Start Stop UnOccupied Timer Active RTU 1 Temperature sensor open Power Heat Required Occupied Optimum Start Stop UnOccupied Ti...

Страница 12: ...cable environmental health or safety legislation No implied warranties shall extend beyond twenty four 24 months from the production date Some states or provinces do not allow limitations on how long...

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