- 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
