tekmar 346 User Manual

- Data Brochure

Power Manager 346

D 346

04/08

1

Information

Brochure

Choose controls

to match

application

2

Application

Brochure

Design your

mechanical

applications

3

Rough-in

Rough-in

instructions

Wiring

wiring

4

Wiring

Brochure

Wiring and

installation of

specific control

5

Data

Brochure

Control settings

and sequence of

operation

6

Job

Record

Record settings &

wiring details for

future reference

Introduction

The Power Manager 346 has an internal transformer that powers a tekmarNet®4 (tN4) System Control 420, 421, 422,
or 423. The 346 also includes four on-off demand inputs that can be used to provide a tN4 communication message to
activate the reset module. This allows a mixture of non-communicating and tN4 communicating controls to use a tN4
System Control.

Features:

tN4 Compatible

•
Four tN4 Buses

•
Four On-Off Demand Inputs

•
Converts Demands to tN4 Communication

•

Three Auxiliary Pumps

•
Internal 50 VA Transformer

•
CSA C US Certified for use in USA and Canada

•

Power Manager 346

tektra 1019-01

For product instructions, see brochure
Input Power: 115 V (ac) ±10% 60 Hz, 12 A
All Loads Using Input Power: 11.5 A
Relay Ratings: 115 V (ac) 5 A
Relay Power: 115 V (ac) ±10% 60 Hz, 10 A
Demands: 20 to 260 V (ac) 2 VA

1 of 8 © 2008 D 346 - 04/08

Boiler Bus 0 Demand Power

Bus 1 Demand
Bus 2 Demand
Bus 3 Demand

Aux Pump 1
Aux Pump 2
Aux Pump 3
tN4

For product literature:
www.tekmarcontrols.com
Caution! Disconnect All
Power before Opening

Table of Contents

Sequence of Operation .................................................2

Application 1 - On/Off Demand ................................ 2

Application 2 - Power for Modules ............................3

On-Off Demand to tN4 Conversion ..........................4

Room Occupied and Unoccupied Settings...............4

Room Unoccupied .................................................... 5

Schedules ................................................................5

LED Status Indicators ................................................... 6

Flashing LED Indicated Error Message ........................ 7

Cleaning the Control ..................................................... 7

Schedules ................................................................4

Auxiliary Pumps .......................................................4

Warranty ....................................................................... 8

Switch Settings .............................................................5

Room Occupied .......................................................5

Sequence of Operation

Application 1 - On/Off Demands

One application is to provide a method to convert on-off demands into a tN4 message for an outdoor reset water temperature
and send this message to a tN4 reset module. tN4 reset modules include the 420, 421, 422 and 423.

Reset

Module

Optional

Mixing

On/Off

Demands

346

© 2008 D 346 - 04/08 2 of 8

Application 2 - Zoning at Remote Manifolds

The other application is to use the 346 to provide power to a reset module and mixing expansion modules. This allows the
reset module, 346, and mixing expansion modules to be located in the mechanical room while the zone managers can be
remotely located at the manifold locations.

Reset

Module

2 Conductors

346

Mixing

Expansion

Module

tN4

Zone

Manager

Optional

Mixing

Mechanical Room Manifold Location

OR

2 Conductors Thermostats

End

Reset

Module

346

Switch

Zone Valve Control

Mixing

Expansion

Module

Optional

Mixing

Mechanical Room Manifold Location

3 of 8 © 2008 D 34 6 - 04/08

On – Off Demand to tN4 Conversion

The 346 has four demand inputs and four tN4 bus outputs:

Inputs Outputs

Boiler Demand (0) tN4 Boiler Bus 0
Demand 1 tN4 Bus 1
Demand 2 tN4 Bus 2
Demand 3 tN4 Bus 3

A demand is a call for heat from a non-tN4 communicating
device. When a voltage between 24 to 260 V(ac) is applied
to a demand input, a tN4 message to activate the heating
occurs on the corresponding tN4 bus. The tN4 bus allows
for the demand input and tN4 devices (thermostats and
setpoint controls) to be mixed together on the same tN4
bus. The demand input on the 346 is fixed to tN4 address
01 on the bus that the demand is wired to.

When a demand is received, a tN4 message is sent to
request a desired Room temperature. The desired Room
temperature is used as a factor in the outdoor reset calculation
to determine the water temperature for a tN4 bus.

Apply

20 to 260 V (dc)

Demand

tN4 Message Created

Room Occupied

or

Room UnOccupied

tN4 Message to
System Control

tN4 C

Schedules

Use of schedules on the 346 requires the use of a schedule
master device. This can be a Timer 033, a tN4 Programmable
Thermostat, or a tN4 Setpoint Control 162. The schedule
master maintains the current time and sends messages
to schedule members to switch between Occupied and
Unoccupied settings.

Each of the four demand inputs can be configured to
respond to one of three schedule masters. When a demand
is received, the schedule master determines whether the
Room Occupied or at the Room Unoccupied temperature
in used in the tN4 call for heat message.

The schedule master that each tN4 bus belongs to is
determined using a pair of switch setting positions. The
combinations are shown in the Switch Setting section of
the brochure.

If the schedule master uses a 4 event schedule (wake,
unoccupied, occupied, sleep), the wake time period causes
the 346 to operate at the Room Occupied temperature,
and the sleep time period causes the 346 to operate at
the Room Unoccupied temperature.

tN4 Bus

tN4 Schedule

346

Master

Room Occupied and Unoccupied Settings

When a demand on the 346 is powered, a tN4 message is
generated and sent to the reset control. This tN4 message
requests a water temperature based upon the desired
Room Occupied or Room Unoccupied setting. The Room
Occupied temperature has four available preset temperatures
selected by the position of two switch settings. Likewise,
the Room Unoccupied temperature has four available
preset temperatures selected by the position of two other
switch settings. The Room Occupied or Room Unoccupied
temperature is selected by a schedule master. See Switch
Settings section for details.

Auxiliary Pumps

The 346 includes three auxiliary pump inputs (terminal 4, 8
and 12) and three powered auxiliary pump outputs (terminals
25, 29 and 31). When the auxiliary pump input is powered
with 24 V (ac), the corresponding auxiliary pump output is
energized with 120 V (ac).

25 26

Aux tN4 C R

Pmp 1

4 567

1

Aux Pump 1

Pmp N

Pump

ON

© 2008 D 346 - 04/08 4 of 8

Switch Settings

12
11

12
11

12
11

12
11

10

9

10

9

10

9

10

9

8
7

8
7

8
7

8
7

6

5

6

5

6

5

6
5

4
3

4
3

4
3

4
3

2

1

2

1

2

1

2
1

Room Occ

Room UnOcc

0Boil

1

2

3

1

3

11

9

7

5

12

10

8

6

4

2

Schedule

Member

With the cover removed, the switch settings are located on the right hand side of the 346.

20 21

Boil Bus

Demand

0

227

tN4C C

Boil 0

12

tN4

Aux

R R R

Pmp1

1

56

4

3

Limited power available, see wiring brochure

tN4

Aux

R

CC

Pmp2

2

910

8

Aux

tN4

Pmp3

11

3

12

13 14

15

3 Bus 2

Bus
Dem DemDem

16 17

Com

Bus 1

Demand

18

19

Power Manager 346

tektra 1019-01

For product instructions, see brochure
Input Power: 115 V (ac) ±10% 60 Hz, 12 A
All Loads Using Input Power: 11.5 A
Relay Ratings: 115 V (ac) 5 A
Relay Power: 115 V (ac) ±10% 60 Hz, 10 A
Demands: 20 to 260 V (ac) 2 VA

23 24

Input Power

L

25 26

Aux Pump 1

Pmp

N

N

Boiler Bus 0 Demand Power

Bus 1 Demand
Bus 2 Demand
Bus 3 Demand

27 28

Relay Power

L

29 30

Aux Pump 2

Pmp

N

Aux Pump 1
Aux Pump 2
Aux Pump 3
tN4

For product literature:
www.tekmarcontrols.com

Caution! Disconnect All

Power before Opening

31 32

Aux Pump 3

Pmp

N

N

Room Occupied

The Room Occupied can be set to one of four temperatures
using the following switch setting pair combinations:

Temperature

Room
Occupied

75°F

(24.0°C)

12
11

72°F

(22.0°C)

12
11

68°F

(20.0°C)

12
11

65°F

(18.5°C)

12
11

Room Unoccupied

The Room Unoccupied can be set to one of four temperatures
using the following combinations:

Temperature

Room
Unoccupied

50°F

(10.0°C)

10

9

55°F

(13.0°C)

10

9

60°F

(15.5°C)

10

9

65°F

(18.5°C)

10

9

24 V (ac) Fuse: T2.5 A 250 V

12

Room Occ

11

Room UnOcc

10

9

8

0Boil

7

6

1

5

4

2

3

Member

Schedule

2

3

Meets Class B: Canadian
ICES & FCC Part 15
Supply wires 90°C/105°C
See manual

1

H7011A

Schedules

For each tN4 bus, there are a pair of switches that determine
which schedule master to follow as a schedule member.

Member of Schedule

Bus Off 123

tN4
Boiler
Bus 0

tN4
Bus 1

tN4
Bus 2

tN4
Bus 3

5

1

5

1

5

1

5 of 8 © 2008 D 34 6 - 04/08

LED Status Indicators

tN4 LED

Boiler Bus 0 Demand Power

Bus 1 Demand
Bus 2 Demand
Bus 3 Demand

Aux Pump 1
Aux Pump 2
Aux Pump 3
tN4

Power LED

Solid Green:

Normal operation.

•

Solid Amber:

Power is present but the fuse for the internal 24 V (ac)

•
transformer is blown.

Off:

No power to the Input Power terminals on the Power

•
Manager.

Auxiliary Pump 1 LED

Solid Green:

Auxiliary Pump 1 is on.

•

Off:

Auxiliary Pump 1 is off.

•

Solid Green:

The Power Manager has established tN4 communication

•
to a tN4 System Control.

Off:

There is no tN4 communication to the tN4 System

•
Control.

Boiler Bus 0 LED

Solid Green:

A Boiler Bus 0 Demand is present.

•

Off:

A Boiler Bus 0 Demand is not present.

•

Bus 1 Demand LED

Green:

Bus 1 Demand is present.

•

Off:

Bus 1 Demand is not present.

•

Bus 2 Demand LED

Green:

Bus 2 Demand is present.

•

Off:

Bus 2 Demand is not present.

•

Bus 3 Demand LED

Auxiliary Pump 2 LED

Solid Green:

Auxiliary Pump 2 is on.

•

Off:

Auxiliary Pump 2 is off.

•

Auxiliary Pump 3 LED

Solid Green:

Auxiliary Pump 3 is on.

•

Off:

Auxiliary Pump 3 is off.

•

Green:

Bus 3 Demand is present.

•

Off:

Bus 3 Demand is not present.

•

© 2008 D 346 - 04/08 6 of 8

Flashing LED Indicated Error Messages

When an error is present, two LED will flash together. Once the error has been corrected, the LED will stop flashing.

tN4 and Boiler Bus 0 Demand LED flash

Boiler Bus 0 Demand

Boiler demand is present
and there is no tN4 Boiler
Bus connection to a tN4
System Control.

tN4

tN4 and Bus 1 Demand LED flash

Bus 1 Demand

Demand 1 is present and
there is no tN4 Bus 1
connection to a tN4 System
Control.

tN4

tN4 and Bus 2 Demand LED flash

Demand 2 is present and

Bus 2 Demand

there is no tN4 Bus 2
connection to a tN4 System
Control.

tN4

tN4 and Bus 3 Demand LED flash

Demand 3 is present and
there is no tN4 Bus 3

Bus 3 Demand

connection to a tN4 System
Control.

tN4

Cleaning the Control

The control’s exterior can be cleaned using a damp cloth. Moisten the cloth with water and wring out prior to wiping the
control. Do not use solvents or cleaning solutions.

7 of 8 © 2008 D 34 6 - 04/08

Limited Warranty and Product Return Procedure

Limited Warranty The liability of tekmar under this

warranty is limited. The Purchaser, by taking receipt
of any tekmar product (“Product”), acknowledges the
terms of the Limited Warranty in effect at the time of
such Product sale and acknowledges that it has read
and understands same.

The tekmar Limited Warranty to the Purchaser on the
Products sold hereunder is a manufacturer’s pass­through warranty which the Purchaser is authorized to
pass through to its customers. Under the Limited War­ranty, each tekmar Product is warranted against defects
in workmanship and materials if the Product is installed
and used in compliance with tekmar’s instructions, ordi­nary wear and tear excepted. The pass-through warranty
period is for a period of twenty-four (24) months from the
production date if the Product is not installed during that
period, or twelve (12) months from the documented date
of installation if installed within twenty-four (24) months
from the production date.

The liability of tekmar under the Limited Warranty shall
be limited to, at tekmar’s sole discretion: the cost of parts
and labor provided by tekmar to repair defects in materi­als and / or workmanship of the defective product; or to the
exchange of the defective product for a warranty replace­ment product; or to the granting of credit limited to the origi­nal cost of the defective product, and such repair, exchange
or credit shall be the sole remedy available from tekmar,
and, without limiting the foregoing in any way, tekmar is
not responsible, in contract, tort or strict product liability,
for any other losses, costs, expenses, inconveniences, or
damages, whether direct, indirect, special, secondary, inci­dental or consequential, arising from ownership or use of
the product, or from defects in workmanship or materials,
including any liability for fundamental breach of contract.

The pass-through Limited Warranty applies only to those
defective Products returned to tekmar during the warranty
period. This Limited Warranty does not cover the cost of the
parts or labor to remove or transport the defective Product,
or to reinstall the repaired or replacement Product, all such
costs and expenses being subject to Purchaser’s agree­ment and warranty with its customers.

Any representations or warranties about the Products made
by Purchaser to its customers which are different from or in

excess of the tekmar Limited Warranty are the Purchaser’s
sole responsibility and obligation. Purchaser shall indem­nify and hold tekmar harmless from and against any and all
claims, liabilities and damages of any kind or nature which
arise out of or are related to any such representations or
warranties by Purchaser to its customers.

The pass-through Limited Warranty does not apply if the
returned Product has been damaged by negligence by per­sons other than tekmar, accident, fire, Act of God, abuse or
misuse; or has been damaged by modifications, alterations
or attachments made subsequent to purchase which have
not been authorized by tekmar; or if the Product was not
installed in compliance with tekmar’s instructions and / or
the local codes and ordinances; or if due to defective instal­lation of the Product; or if the Product was not used in com­pliance with tekmar’s instructions.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRAN­TIES, EXPRESS OR IMPLIED, WHICH THE GOVERNING
LAW ALLOWS PARTIES TO CONTRACTUALLY EXCLUDE,
INCLUDING, WITHOUT LIMITATION, IMPLIED WARRAN­TIES OF MERCHANTABILITY AND FITNESS FOR A PAR­TICULAR PURPOSE, DURABILITY OR DESCRIPTION OF
THE PRODUCT, ITS NON-INFRINGEMENT OF ANY REL­EVANT PATENTS OR TRADEMARKS, AND ITS COMPLI­ANCE WITH OR NON-VIOLATION OF ANY APPLICABLE
ENVIRONMENTAL, HEALTH OR SAFETY LEGISLATION;
THE TERM OF ANY OTHER WARRANTY NOT HEREBY
CONTRACTUALLY EXCLUDED IS LIMITED SUCH THAT
IT SHALL NOT EXTEND BEYOND TWENTY-FOUR (24)
MONTHS FROM THE PRODUCTION DATE, TO THE
EXTENT THAT SUCH LIMITATION IS ALLOWED BY THE
GOVERNING LAW.

Product Warranty Return Procedure All Products that
are believed to have defects in workmanship or materials
must be returned, together with a written description of the
defect, to the tekmar Representative assigned to the terri­tory in which such Product is located. If tekmar receives an
inquiry from someone other than a tekmar Representative,
including an inquiry from Purchaser (if not a tekmar Repre­sentative) or Purchaser’s customers, regarding a potential
warranty claim, tekmar’s sole obligation shall be to provide
the address and other contact information regarding the
appropriate Representative.

tekmar Control Systems Ltd., Canada
tekmar Control Systems, Inc., U.S.A.

Head Office: 5100 Silver Star Road
Vernon, B.C. Canada V1B 3K4
[phone] Fax. [phone]
Web Site: www.tekmarcontrols.com

Product design, software and literature are Copyright © 2008 by:
tekmar Control Systems Ltd. and tekmar Control Systems, Inc.

8 of 8

All specifications are subject to change without notice.

Printed in Canada. D 346 - 04/08.