Tekmar 420 Manuale utente

D420

06/05

- Data Brochure

Boiler Reset Module 420

•

• tN4 Compatible

•

• Boiler Outdoor Reset

•

• Single On-Off or Modulating Boiler

•

• Powered Pump Outputs

•

• Setpoint Operation

•

• DHW Operation

•

• Includes Sensors

Features:

Information

Brochure

Choose controls

to match

application

1Application

Brochure

Design your

mechanical

applications

2Wiring

Brochure

Wiring and

installation of

specific control

4Job

Record

Record settings &

wiring details for

future reference

Data

Brochure

Control settings

and sequence of

operation

Rough-in

Wiring

Rough-in

wiring

instructions

The Boiler Reset Module 420 provides outdoor reset to a hydronic heating system in order to maximize comfort and

efficiency. The 420 can operate a single on / off boiler or a single modulating boiler. The 420 can override the outdoor reset

water temperature to provide Domestic Hot Water or Setpoint operations.

Introduction

52 53 54 55 56 57 58 60 61 62 63 64

Boiler DHW Setpoint C

C Com Boil OutVlv

Demand Demand 24 V (ac) DHW

Mod (dc)

–

DHW Primary

10 A

max.

66 67 68 69

Pump NPump

tN4

H7006B

Boil On-Off / Mod

Off / tekmar Stager

PoweredOutput 1 VA

DHW Valve:

24 V (ac) 8 VA

Made in Canada

Meets Class B: Canadian

ICES & FCC Part 15

Test

Boiler Reset Module 420

Item

tektra 991-01

Demands: 20 - 260 V (ac)

Relay Rating: 115 V (ac) 5 A

Do not apply power

Table of Contents

Table of Contents ...........................................................2

Display and DIP Switches ..............................................2

Dip Switch Settings ................................................2

Access Level...........................................................3

Display and Symbols Description ...........................4

User Interface ........................................................5

Display Menus................................................................6

View Menu ..............................................................6

Adjust Menu............................................................7

Miscellaneous Menu .............................................10

Testing the Control ....................................................... 11

Sequence of Operation................................................. 12

tekmarNet®4 Communication ............................... 12

Outdoor Reset ...................................................... 12

Boiler Temperature Control .................................. 14

tekmar Stager Operation ...................................... 17

Zone Load Shedding ............................................ 17

Domestic Hot Water Temperature Operation ....... 17

DHW with Low Temperature Boilers ..................... 19

Setpoint Temperature Operation...........................19

Pump Operation....................................................20

Error Messages ............................................................21

Troubleshooting ............................................................23

Warranty .......................................................................24

Set the DIP switch settings prior to making adjustments

to the control through the user interface. Setting the DIP

switches determines which menu items are displayed in

the user interface.

If you change a DIP switch setting while the control is

powered up, the LCD display returns to the View menu.

Lock/Unlock

Use the Lock/Unlock DIP switch to lock and unlock the Access

Level of the 420 and all connected tN4 devices, including

tN4 thermostats. For details, see “Access Levels”

•

• Once locked, the access level in all devices cannot be

viewed or changed.

•

• To determine if the control is currently locked a small

segment representing a padlock is viewed in the bottom

right hand corner of the display.

•

• To unlock the Access Level, set the DIP switch to

Unlock.

•

• To lock the Access Level, set the DIP switch to Lock.

Dip Switch Settings

Display and DIP Switches

52 53 54 55 56 57 58 60 61 62 63 64

Boiler DHW Setpoint C

C Com Boil OutVlv

Demand Demand 24 V (ac) DHW

Mod (dc)

–

DHW Primary

10 A

max.

66 67 68 69

Pump NPump

tN4

H7006B

Boil On-Off / Mod

Off / tekmar Stager

PoweredOutput 1 VA

DHW Valve:

24 V (ac) 8 VA

Made in Canada

Meets Class B: Canadian

ICES & FCC Part 15

Test

Boiler Reset Module 420

Item

tektra 991-01

Demands: 20 - 260 V (ac)

Relay Rating: 115 V (ac) 5 A

Do not apply power

Boil On-Off / Mod

Off / tekmar Stager

Access Level

Boil On-Off/Mod

The Boil On-Off/Mod DIP switch selects whether the

control operates an On-Off boiler or the firing rate of a

Modulating boiler.

•

• If set to Boil On-Off, the control operates an On-Off

boiler.

•

• If set to Mod, the control operates a Modulating boiler.

tekmar Stager/Off

Use the tekmar Stager/Off DIP switch when a tekmar

staging control is be connected to the 420 in order to

operate multiple boilers. A tekmar stager may include

Boiler Controls 264, 265, and 268.

•

• If a tekmar Stager is installed, set to tekmar Stager.

When the tekmar Stager/Off DIP switch is set to tekmar

Stager, the Boiler Sensor DIP switch must be set to

Sup.

•

• If a tekmar Stager is not installed, set to Off.

The Access Level restricts the number of Menus, Items,

and Adjustments that can be accessed by the user. The

Access Level setting is found in the Miscellaneous (MISC)

menu. Select the appropriate access level for the people

who work with the control on a regular basis.

There are two Access Level settings:

•

• Installer (InS): This is the factory default setting. This

access level is sufficient for the normal set up of the

control.

•

• Advanced (Ad): All of the control settings are available

to the user.

In the following menu tables, the access level the item is

visible in is shown in the access column.

PUMP

Displays when the primary or mixing pump

is in operation.

BURNER

Displays when the burner contact is

closed.

LOCK

Displays when the access levels are

locked.

WARNING

Displays when an error exists.

COMMUNICATION BUS

Displays when tN4 thermostats are

connected.

DHW PUMP

Displays when the DHW Pump is in

operation.

°F, °C, %, HOURS, MINUTES

Units of measurement.

BOILER DEMAND

Displays when a boiler demand is present.

DHW DEMAND

Displays when a DHW demand is present.

SETPOINT DEMAND

Displays when a Setpoint demand is

present.

DEVICE OUTPUT SCALE

Displays output of the modulating boiler.

Item Field

Displays an

abbreviated name

of the selected item

Number Field

Displays the

current value of

the selected item

Status Field

Displays the current

status of the control’s

inputs, outputs and

operation. Most symbols

in the status field are

only visible when the

VIEW Menu is selected

Menu Field

Displays the

current menu

Display

Symbols Description

User Interface

Continue

to next Item

Back to View Menu

Continue

to next Item

Continue

to next Item

Use the User Interface available on the Liquid Crystal Display

(LCD) to setup and monitor the operation of the system.

Use the four push buttons to the left of the LCD (Menu,

Item, Up, Down) to select settings. As you enter settings,

record the settings in the Job Record J420.

The menus display in the Menu Field at the top left side

of the LCD. Three menus are available: View, Adjust, and

Miscellaneous.

•

• To select a menu, press and release the Menu button.

Item

In each menu, a group of items can be selected. The

abbreviated name of the selected item displays in the Item

field of the LCD display.

•

• To view the next available item, press and release the

Item button.

•

• To view the previous item, hold down the Item button.

and press and release the Up button.

Adjusting a Setting

To adjust a setting:

1. Select the appropriate menu using the Menu button.

2. Select the item using the Item button.

3. Use the Up or Down button to make the adjustment.

Default Item

•

• To set the default item in the View menu, display the

item for more than five seconds.

After navigating menus, the display reverts back to the

default item after 60 seconds of button inactivity.

View Menu (1 of 1)

Item Field Range Access Description

-76 to 149°F

(-60.0 to 65.0°C)

InS

OUTDOOR SECTION B

Current outdoor air temperature as measured by

the outdoor sensor.

-22 to 266°F

(-30.0 to 130.0°C)

InS

BOILER SUPPLY SECTION C

Current boiler supply water temperature as measured

by the boiler sensor.

– – –, 35 to 230°F

(– – –, 1.5 to 110.0°C) Ad

BOILER TARGET SECTION C

The boiler target is the temperature the control is

currently trying to maintain at the boiler supply sensor.

“– – –” is displayed when no heat is required for boiler

zones.

0- 100% Ad

BOILER MODULATION SECTION C

Current percent modulation of the boiler’s burner.

Note: This item is only available when the Boiler

On-Off /Mod DIP switch is set to Mod.

0 to 9999 hr InS

BOILER RUN TIME

The total running time of the boiler since this item

was last cleared. To clear this item, press the Up

and Down buttons simultaneously while viewing

this item.

The View menu items display the current operating

temperatures and status information of the system.

VIEW MENU

Display Menus

After the last item, the control returns to the first item in the menu.

Item Field

Range

Access Description

-60 to 45°F

(-51.0 to 7.0°C)

Default = 10°F

(-12.0°C)

InS

OUTDOOR DESIGN SECTION B

The design outdoor air temperature used in the heat

loss calculations for the heating system. Typically set

to the temperature of the coldest day of the year.

1HRF1

2HRF2

3Fancoil

4Fin-tube Convector

5Radiator

6Baseboard

Default = 4

InS

BOILER TERMINAL SECTION B

The type of heating terminal units that are being

used in boiler zones.

40 to 100°F

(4.5 to 38.0°C)

Default = 70°F

(21.0°C)

BOILER INDOOR SECTION B

The design indoor air temperature used in the heat

loss calculation for the boiler zones. Typically set to

70°F (21.0°C).

70 to 220°F

(21.0 to 104.5°C)

Default = 180°F

(82.0°C)

InS

BOILER DESIGN SECTION B

The supply water temperature required for boiler

zones on the typical coldest day of the year.

OFF, 80 to 180°F

(OFF, 26.5 to 82.0°C)

Default = 140°F

(60.0°C)

InS

BOILER MINIMUM

SECTION C

The minimum allowed boiler target temperature and

boiler return protection temperature. Check the boiler

manufacturer’s manual for recommend supply water

temperatures.

120 to 225°F, OFF

(49.0 to 107.0°C, OFF)

Default = 200°F

(93.5°C)

Ad BOILER MAXIMUM SECTION C

The maximum allowed boiler target temperature.

0:00 to 3:00 min

Default = 0:10 min Ad

FIRE DELAY SECTION C

The time delay the control can expect between the

time that the relay contact closes to fire the boiler

and when the burner actually fires.

Adjust Menu (1 of 3)

The Adjust Menu items are the programmable settings

used to operate the mechanical equipment.

Continued on next page.

ADJUST MENU

Item Field

Range

Access Description

Au, 2 to 42°F

(Au, 1 to 23.5°C)

Default = Au

BOILER DIFFERENTIAL SECTION C

The temperature differential that the control is to use

when it is operating the boiler.

10 to 230 seconds

Default = 30 seconds Ad

BOILER MOTOR SECTION C

The amount of time required for the modulating

actuating motor to fully open the gas valve or operate

the fan speed from a stopped position to full speed

on a modulating boiler.

Note: This item is only available when the Boiler

On-Off /Mod DIP switch is set to Mod.

0 to 50%

Default = 0% Ad

MINIMUM MODULATION SECTION C

The minimum percent modulation of the burner.

Note: This item is only available when the Boiler

On-Off /Mod DIP switch is set to Mod.

50 to 100%

Default = 100% Ad

MAXIMUM MODULATION SECTION C

The maximum percent modulation of the burner.

Note: This item is only available when the Boiler

On-Off /Mod DIP switch is set to Mod.

Au, 5 to 30 min

Default = Au Ad

CYCLE LENGTH

The cycle length to which all tN4 devices will

synchronize.

OFF, Mb1, Mb2, Mb3,

Mb4

Default = OFF

InS

SCHEDULE

Selects which network setback schedule the control

will follow.

OFF,

1(parallel, no priority)

2(parallel, priority)

3(pri-sec, no priority)

4(Pri-sec, priority)

Default = 1

InS

DHW MODE SECTION F

Selects the DHW mode of operation. This determines

the operation of the primary pump in combination

with the DHW pump and whether or not DHW priority

is required.

100 to 220°F

(38.0 to 104.5°C)

Default = 180°F

(82.0°C)

DHW EXCHANGE OCCUPIED SECTION F

The minimum boiler target temperature to the DHW

heat exchanger during the Occupied period.

Note: This item is only available when DHW Mode is

set 1 through 4.

Adjust Menu (2 of 3)

Continued on next page.

ADJUST MENU

Item Field

Range

Access Description

OFF, ON

Default = OFF Ad

DHW EXCHANGE UNOCCUPIED SECTION F

Selects whether the control should respond to DHW

demands during the Unoccupied period. This item is

only available when DHW Mode is set 1 through 4 and

a network setback schedule is selected.

OFF,

1 (parallel, no priority)

2 (parallel, priority)

3 (pri-sec, no priority)

4 (Pri-sec, priority)

Default = 1

SETPOINT MODE SECTION H

Selects the Setpoint mode of operation. This

determines the operation of the primary pump.

60 to 220°F

(15.5 to 104.5°C)

Default = 180°F

(82.0°C)

SETPOINT OCCUPIED SECTION H

The minimum boiler target temperature when a

setpoint demand is present during the Occupied

period.

Note: This item is only available when Setpoint Mode

is set 1 through 4.

OFF, ON

Default = OFF Ad

SETPOINT UNOCCUPIED SECTION H

Selects whether or not a Setpoint demand will be

responded to during the UnOccupied period.

Note: This item is only available when Setpoint Mode

is set 1 through 4 and a network setback schedule

is selected.

40 to 100°F, OFF

(4.5 to 38.0°C, OFF)

Default = 70°F (21.0°C)

InS

WWSD OCCUPIED SECTION B

The system’s warm weather shut down temperature

during the Wake and Occupied periods.

40 to 100°F, OFF

(4.5 to 38.0°C, OFF)

Default = 60°F (15.5°C)

WWSD UNOCCUPIED SECTION B

The system’s warm weather shut down temperature

during the Sleep and Unoccupied period.

Note: This item is only available when the Schedule

is not set to OFF.

Adjust Menu (3 of 3)

ADJUST MENU

After the last item, the control returns to the first item in the menu.

Item Field Range Access Description

InS (Installer)

Ad (Advanced)

InS

ACCESS LEVEL

The access level that is to be used by the control.

Note: This item is only available when the Lock/Unlock

DIP switch is set to Unlock.

°F, °C

Default = °F

InS

UNITS

Select temperature units between Fahrenheit and

Celsius.

0 to 255 Ad

COMMUNICATION ERRORS

The number of tN4 communication errors that have

been recorded.

– – –, 1 to 24 Ad BOILER BUS DEVICES

Displays the number of devices on the boiler bus.

OFF, SEL Ad

FACTORY DEFAULT

Loads the factory defaults when the Up and Down

buttons are pressed.

420 InS

TYPE

Displays the type number of this product. The software

version is displayed when the Up button is held.

Misc (Miscellaneous) Menu (1 of 1)

The Miscellaneous Menu Items set control

and display options such as access level and

temperature units.

After the last item, the control returns to the first item in the menu.

MISC MENU

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