background image

3

At the start of the night setback period the heat is turned off, but the heat
contained within the slab or radiator continues to heat the building and
there is a delay before the space temperature begins to drop. At the end
of this delay the temperature within the building gradually decreases, and
may eventually reach the required UnOccupied temperature after suffi-
cient time has elapsed. Once the setback period is complete, the heat is
turned on again but there is a long recovery time required to raise the
space temperature to the desired setpoint. The length of the delay and
recovery periods changes with outdoor temperature and is different for
each zone within the building.

A comfortable setback can be provided if the control “learns” the
response time for each zone within the building. Based on the zone’s
response time, the control can then calculate an Optimum Stop time and
an Optimum Start time. At the Optimum Stop time the control turns off the
zone valve or pump in order to overcome the delay period and at the
Optimum Start time, the control starts to raise the zone temperature in
order to overcome the recovery period. This allows night setback to be
used with most heating systems.

Optimum Start / Stop with Water Temperature Boost  

 

When Optimum Start / Stop is combined with Outdoor Reset, the
control can boost the water temperature during the recovery period.
This provides a faster recovery and allows a longer setback for greater
energy savings.

The accuracy of the Optimum Start / Stop routine depends on the
feedback available to the control.

Optimum Start / Stop with both Outdoor and Indoor Sensors 



The response time of the building varies with outdoor temperature and is also different
for each zone. The most accurate Optimum Start / Stop routine is therefore achieved
when both the indoor and outdoor temperatures are monitored during transitions between
UnOccupied and Occupied modes.

Optimum Start / Stop with only Indoor Sensors 



When only indoor temperature feedback is available, the control must base all Optimum
Start / Stop calculations on

 indoor temperature only. If there are large variations in outdoor

temperature, this method cannot provide the same level of accuracy as when both indoor
and outdoor sensors are used.

Optimum Start / Stop with only an Outdoor Sensor 



Every building, and often each zone within the building, has a different response time.
When only an outdoor sensor is used, the control must assume a particular response time
for the entire building. Therefore this is generally the least accurate method of calculating
Optimum Start / Stop times.

Basic Sequence of Operation

To use the basic features of the control, the DIP switches must be set to
One & Two Stage and Zone 2 Heating and the Design Outdoor dial must
be set to Off . More advanced features including modulating zones, free
cooling and demand limiting are explained on page 10.

POWERING UP THE CONTROL 

After the Zone Control 367 is powered up, a software version code is displayed for 2 seconds
and then the red indicator lights are then turned on for 4 seconds. When the control is
powered up, the green 

Power light remains on continuously. For the first fifteen minutes

after power up, the 

Test light flashes and the control responds immediately to changes of

settings. This allows the installer to test the operation of the system. After fifteen minutes,
the control enters its normal operating mode in which reactions to setting changes are
significantly slower. A slower reaction time to setting changes allows the control to provide
a more stable room temperature.

Only in the first 15 minutes after power up, does

the control respond immediatley to settings

adjustments.

70

M

Test

Delay
Period

5 A.M.

9 P.M.

10 P.M.

8 A.M.

Room Temperature

Setback Period

Optimum
Stop

Recovery

Period

Optimum
Start

Occ

70

°

F

(21

°

C)

UnOcc

65

°

F (18

°

C)

Delay
Period

6 A.M.

9 P.M.

10 P.M.

8 A.M.

Room Temperature

Setback Period

Optimum
Stop

Shorter

Recovery

Period

Optimum
Start

UnOcc

65

°

F (18

°

C)

Occ

70

°

F

(21

°

C)

Delay
Period

8 A.M.

10 P.M. 11 P.M.

11 A.M.

Recovery

Period

Setback Period

Occ

70

°

F (21

°

C)

UnOcc

65

°

F

(18

°

C)

Zone 2 Heating

One & Two Stage

0

°

F

-40

Off

Design Outdoor

30

Outdoor

Sensor

Room

Temperature

Units (RTU's)

Room

Temperature

Units (RTU's)

Outdoor

Sensor

Summary of Contents for Zone Control 367

Page 1: ...ngs pg 9 Technical Data pg 16 Advanced Sequence of Operation pg 10 Limited Warranty pg 16 Advanced Installation pg 12 Zone Control 367 One Two Stage One Stage Floating H1121 2 Made in Canada by tekmar...

Page 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...

Page 3: ...ontrol must base all Optimum Start Stopcalculationsonindoortemperatureonly Iftherearelargevariationsinoutdoor temperature this method cannot provide the same level of accuracy as when both indoor and...

Page 4: ...agerelay and a Hi stage relay Example An RTU connected between the terminals Com Sen RTU 2 is used to control the output relays 1 and 2 Relay 1 is the Lo stage output relay and relay 2 is the Hi stage...

Page 5: ...re is no RTU or Indoor Sensor connected to terminals Com Sen RTU 1 5 6 the 367 can enable an auxiliary cooling control through output relay 1 Output relay 1 is turned on once the heating zones connect...

Page 6: ...ne valves or pumps If a zone valve or zone pump has not been operated in the past 3 days the 367 turns on the zone relay for 10 seconds Note The zone relay exercising time is increased to 3 minutes if...

Page 7: ...versed UnOccupied Switch Ifanexternaltimerorswitchisused connectthetwowiresfromtheexternaldrycontact switch to the UnO Sw Com Sen 14 and 16 terminals When these terminals short together the control re...

Page 8: ...the control If relay 4 is used connect the zone pump or zone valve circuit to the Com 3 4 4 22 and 24 terminals on the control If relay 1 is used for heating DIP switch set to Zone 1 Heating connect t...

Page 9: ...ction for the zone 1 relay If a zone pump or valve is connected to the terminals Com 3 4 4 22 and 24 follow a similar procedure as described above in the cooling section for the zone 1 relay If a zone...

Page 10: ...as soon as the Occupied period begins If the Optimum Start DIP switch is set to Off the 367 does not start raising the building temperature until the UnOccupied period ends More informa tion on the Op...

Page 11: ...367canoperateafananddampertobringoutsideairintothebuilding for free cooling An Indoor Sensor or RTU must be connected between terminals Com Sen RTU 1 and an Outdoor Sensor must be connected to Com Sen...

Page 12: ...nal on the actuating motor and the output relay 4 terminal 24 is connected to the close terminal on the actuating motor Common Block Com 5 6 If the Com 5 6 common block is used to control a floating a...

Page 13: ...eating zone Testing the Control Functions STEP SEVEN OPERATIONAL TEST OF CONTROL FUNCTIONS The Zone Control 367 has a test routine which is used to test the main control functions The 367 continually...

Page 14: ...ct between Com 3 4 3 22 and 23 is closed and the device connected to this relay Open should be turned on Zone 4 Hi Stage The relay contact between Com 3 4 4 22 and 24 is closed and the device connecte...

Page 15: ...ctive Outdoor sensor open circuit design out off Power Heat Required Occupied Optimum Start Stop UnOccupied Timer Active RTU 1 short circuit RTU 2 short circuit RTU 3 short circuit RTU 4 short circuit...

Page 16: ...ry from state to state or province to province ProductReturnProceduresProductsthatarebelievedtohavedefectsinworkmanship or materials must be returned together with a written description of the defect...

Reviews: