tekmar 423 User Manual

- Data Brochure

•

Universal Reset Module 423

D 423

08/07

Information

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Control settings

and sequence of

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Job

Record

Record settings &

wiring details for

future reference

Introduction

The Universal Reset Module 423 provides outdoor reset to a hydronic heating system in order to maximize comfort and efficiency. The 423 can operate two on / off boilers or two modulating boilers. The 423 can override the outdoor reset water temperature to provide Domestic Hot Water or Setpoint operations. The 423 can operate four outdoor reset water temperatures, up to three of these water temperatures can be mixing water temperatures. To operate a mixing device, a Mixing Expansion Module must be connected to the 423 for each mixing water temperature.

Features:

• tN4 Compatible

• Four tN4 Buses

• Up to One Boiler and Three Mixing Water

Temperatures

• Two On-Off or Modulating Boilers

• Equal Run Time Rotation

• Powered Pump Outputs

• DHW Operation

• Optional DHW Sensor

• Setpoint Operation

Stage1/ Stage 2/

Boil Enbl Setp Enbl

51 52 53

Meets Class B: Canadian

H7010A

ICES & FCC Part 15 Made in Canada

Boil Sens Sup / Ret Oﬀ / DHW Sensor Oﬀ / tekmar Stager Boilers On-Oﬀ / Mod Oﬀ / Rotation

Test

Powered Outputs 24 V (ac)

8 VA 1 VA

72 73 74

DHW 24 V (ac)

Vlv

54 55

Item

DHW Setpoint

Demand Demand

Mod2 (dc)Mod1 (dc)

57 58 59 60 6156

76 77 78

CCtN4

tN4

Boiler

Universal Reset Module 423

C2 tN4 tN4

123

62 63

C3C1+–C+–

6564

Demands: 20 - 260 V (ac) Relay Rating: 115 V (ac) 5 A

79 80 81 82

DHW Primary

DHW

Com

Boil Com70Out

66 67

tektra 1006-01

NPump N

68 69

Do not apply power

Pump

tN4

10 A max

Table of Contents

•

Boil Sens Sup / Ret Oﬀ / DHW Sensor Oﬀ / tekmar Stager Boilers On-Oﬀ / Mod Oﬀ / Rotation

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 ............................................................ 8

Miscellaneous Menu ............................................. 15

Testing the Control ....................................................... 16

Sequence of Operation ................................................. 18

tekmarNet

4 Communication ............................... 18

Outdoor Reset ...................................................... 18

Boiler Temperature Control .................................. 21

tekmar Stager Operation ......................................23

Boil Enable ............................................................24

Zone Load Shedding ............................................24

Mixing Operation .................................................. 24

Domestic Hot Water Temperature Operation ....... 25

DHW with Low Temperature Boilers .....................27

Setpoint Temperature Operation ...........................28

Pump Operation ....................................................29

Pump Exercising ................................................... 29

Error Messages ............................................................ 31

Warranty .......................................................................36

Display and DIP Switches

Dip Switch Settings

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 423 and all connected tN4 devices, including tN4 thermostats. For details, see “Access Level”.

• 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.

Stage1/ Stage 2/

Boil Enbl Setp Enbl

51 52 53

Meets Class B: Canadian

H7010A

ICES & FCC Part 15 Made in Canada

Test

Boil Sens Sup / Ret Oﬀ / DHW Sensor Oﬀ / tekmar Stager Boilers On-Oﬀ / Mod Oﬀ / Rotation

Powered Outputs 24 V (ac)

8 VA 1 VA

72 73 74

DHW 24 V (ac)

Vlv

DHW

CCtN4

C3C1+–C+–

C2 tN4 tN4

tN4

Boiler

57 58 59 60 6156

Universal Reset Module 423

123

62 63

Mod2 (dc)Mod1 (dc)

54 55

Item

76 77 78

DHW Setpoint

Demand Demand

6564

66 67

tektra 1006-01

Demands: 20 - 260 V (ac) Relay Rating: 115 V (ac) 5 A

79 80 81 82

DHW Primary

NPump N

Com

Boil Com70Out

68 69

Do not apply power

tN4

Pump

10 A max

Boiler Sup / Ret

•

Off / DHW Sensor

Use the Boiler Sensor Supply / Return DIP switch to select the location of the boiler sensor.

• If the boiler sensor is located on the supply, this DIP

switch should be set to Sup. The 423 is the control that determines the boiler water temperature. Set the boiler’s aquastat at least 20°F (11.0°C) higher than the Boiler Maximum setting.

• If the 423 provides a heat demand to an external boiler

control, this DIP switch must be set to Ret. Install the boiler sensor on the return side of the boiler loop. The boiler’s operating temperature is controlled by its aquastat, or an external boiler reset control.

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 up to two

On-Off boilers.

• If set to Mod, the control operates up to two Modulating

boilers.

Off / tekmar Stager

Use the Off / DHW Sensor DIP switch when a tekmar sensor is be connected to the 423 in order to operate a DHW storage tank.

• If a tekmar sensor is installed for DHW, set to DHW

Sensor. When the Off / DHW Sensor DIP switch is set to DHW Sensor, a regular DHW aquastat cannot be used.

• If a tekmar sensor is not installed for DHW, set to Off.

Off / Rotation

Use the Off / Rotation DIP switch when the Equal Run Time Rotation feature is to be used. This feature changes the firing order of the boilers in order to maintain a similar amount of running time on each boiler.

• If Equal Run Time Rotation is required, set the Off /

Rotation DIP switch to Rotation.

• If Equal Run Time Rotation is not required, set to Off.

Use the Off / tekmar Stager DIP switch when a tekmar staging control is be connected to the 423 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. The

423 will then provide the stager with a target temperature via a 0-10 V (dc) signal. When the Off / tekmar Stager 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.

Access Level

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.

Display

Menu Field

Displays the

current menu

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

Symbols Description

PUMP

Displays when the primary pump is in operation.

Item Field

Displays an abbreviated name of the selected item

Number Field

Displays the current value of the selected item

BOILER DEMAND

Displays when a Boiler Demand is present.

BURNER

Displays when the Stage 1 or Stage 2 contacts are 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 OR VALVE

Displays when the DHW Pump or DHW Valve is in operation.

°F, °C, %, HOURS, MINUTES

Units of measurement.

MIX 1 DEMAND

Displays when a Mix 1 Demand is present.

MIX 2 DEMAND

Displays when a Mix 2 Demand is present.

MIX 3 DEMAND

Displays when a Mix 3 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 the output of the modulating boiler(s) or the variable speed injection pump.

User Interface

•

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 J 423.

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.

Back to View Menu

Continue to next Item

Display Menus

View Menu (1 of 2)

Item Field Range Access Description

The View Menu items display the current operating temperatures and status information of the system.

VIEW MENU

-67 to 149°F

(-55.0 to 65.0°C)

-22 to 266°F

(-30.0 to 130.0°C)

– – –, 35 to 230°F

(– – –, 1.5 to 110.0°C)

-22 to 266°F

(-30.0 to 130.0°C)

– – –, 35 to 230°F

(– – –, 1.5 to 110.0°C)

InS

OUTDOOR SECTION B

Current outdoor air temperature as measured by the outdoor sensor.

MIX 1 SUPPLY SECTION B

Current Mix 1 supply water temperature as measured by the Mix 1 supply sensor.

Note: This item is only available when Bus 1, 2 or 3 is set to Mix 1.

MIX 1 TARGET SECTION B

The Mix 1 target is the temperature the control is currently trying to maintain at the Mix 1 supply sensor. “– – –” is displayed when no heat is required for Mix 1 zones.

Note: This item is only available when Bus 1, 2 or 3 is set to Mix 1.

MIX 2 SUPPLY SECTION B

Current Mix 2 supply water temperature as measured by the Mix 2 supply sensor.

Note: This item is only available when Bus 2 is set to Mix 2.

MIX 2 TARGET SECTION B

The Mix 2 target is the temperature the control is currently trying to maintain at the Mix 2 supply sensor. “– – –” is displayed when no heat is required for Mix 2 zones.

Note: This item is only available when Bus 2 is set to Mix 2.

-31 to 266°F

(-35.0 to 130.0°C)

– – –, 35 to 230°F

(– – –, 1.5 to 110.0°C)

Continued on next page.

InS

MIX 3 SUPPLY SECTION B

Current Mix 3 supply water temperature as measured by the Mix 3 supply sensor.

Note: This item is only available when Bus 3 is set to Mix 3.

MIX 3 TARGET

The Mix 3 target is the temperature the control is currently trying to maintain at the Mix 3 supply sensor. “– – –” is displayed when no heat is required for Mix 3 zones.

Note: This item is only available when Bus 3 is set to Mix 3.

SECTION B

View Menu (2 of 2)

Item Field Range Access Description

-31 to 266°F

(-35.0 to 130.0°C)

– – –, 35 to 230°F

(– – –, 1.5 to 110.0°C)

-31 to 266°F

(-35.0 to 130.0°C)

-31 to 266°F

(-35.0 to 130.0°C)

InS

BOILER SUPPLY

Current boiler supply water temperature as measured by the boiler sensor.

Note: This item is only available when the Boiler Sensor Sup / Ret DIP switch is set to Sup.

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.

Note: This item is only available when the Boiler Sensor Sup / Ret DIP switch is set to Sup.

BOILER RETURN SECTION E

Current boiler return water temperature as measured by the boiler sensor.

Note: This item is only available when the Boiler Sensor Sup / Ret DIP switch is set to Ret.

DHW SECTION H

Current DHW tank temperature as measured by the DHW sensor.

Note: This item is only available when the Off / DHW Sensor DIP Switch is set to DHW sensor.

SECTION B

VIEW MENU

0 to 100% Ad

0 to 999 hr

InS

BOILER 1 MODULATION SECTION C

Current percent modulation of the Boiler 1 burner.

Note: This item is only available when the Boiler On-Off / Mod DIP switch is set to Mod, the Boiler Sensor Sup / Ret DIP switch is set to Sup, and Boiler 1 is set to Auto.

BOILER 2 MODULATION SECTION C

Current percent modulation of the Boiler 2 burner.

Note: This item is only available when the Boiler On-Off / Mod DIP switch is set to Mod, the Boiler Sensor Sup / Ret DIP switch is set to Sup and Boiler 2 is set to Auto.

BOILER 1

The total running time of Boiler 1 since this item was last cleared. To clear this item, press the Up and Down buttons simultaneously while viewing this item.

Note: This item is only available when the Boiler Sensor Sup / Ret DIP switch is set to Sup and Boiler 1 is set to Auto.

BOILER 2

The total running time of Boiler 2 since this item was last cleared. To clear this item, press the Up and Down buttons simultaneously while viewing this item.

Note: This item is only available when the Boiler Sensor Sup / Ret DIP switch is set to Sup and Boiler 2 is set to Auto.

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

Adjust Menu (1 of 7)

The Adjust Menu items are the programmable settings used to operate the mechanical equipment.

Item Field

Range

boil, M1 (Mix 1), OFF

Default = boil

boil, M1 (Mix 1),

M2 (Mix 2), OFF

Default = boil

boil, M1 (Mix 1),

M3 (Mix 3), OFF

Default = boil

-60 to 45°F

(-51.0 to 7.0°C)

Default = 10°F

(-12.0°C)

Access Description

InS

BUS 1 SECTION C

Select the water temperature for tN4 Bus 1.

BUS 2 SECTION C

Select the water temperature for tN4 Bus 2.

Note: M1 is only available if Bus 1 is set to M1 (Mix 1).

BUS 3 SECTION C

Select the water temperature for tN4 Bus 3.

Note: M1 is only available if Bus 1 is set to M1 (Mix 1).

OUTDOOR DESIGN SECTION B

The design outdoor air temperature used in the heat loss calculations for the heating system. Typically set to the outdoor temperature of the coldest day of the year.

ADJUST MENU

Continued on next page.

1 HRF1 2 HRF2 3 Fancoil 4 Fin-tube Convector 5 Radiator 6 Baseboard

Default = 1

40 to 100°F

(4.5 to 38.0°C)

Default = 70°F (21.0°C)

70 to 220°F

(21.0 to 104.5°C)

Default = 120°F

(49.0°C)

InS

MIX 1 TERMINAL SECTION B

The type of heating terminal units that are being used in Mix 1 zones.

Note: This item is only available when Bus 1 is set to Mix 1.

MIX 1 INDOOR

The design indoor air temperature used in the heat loss calculation for Mix 1 zones. Typically set to 70°F (21.0°C).

Note: This item is only available when Bus 1 is set to Mix 1.

MIX 1 DESIGN SECTION B

The supply water temperature required for the Mix 1 zones on the typical coldest day of the year.

Note: This item is only available when Bus 1 is set to Mix 1.

SECTION B

Adjust Menu (2 of 7)

Item Field

Range

OFF, 40 to 150°F

(OFF, 4.5 to 65.5°C)

Default = OFF

80 to 220°F, OFF

(26.5 to 104.5°C, OFF)

Default = 140°F

(60.0°C)

30 to 230 seconds

Default = 105

1 HRF1 2 HRF2 3 Fancoil 4 Fin-tube Convector 5 Radiator 6 Baseboard

Default = 1

Access Description

MIX 1 MINIMUM

InS

The minimum allowed Mix 1 target temperature.

Note: This item is only available when Bus 1 is set to Mix 1.

MIX 1 MAXIMUM SECTION G

The maximum allowed Mix 1 target temperature.

Note: This item is only available when Bus 1 is set to Mix 1.

MIX 1 MOTOR SECTION G

The time that the Mix 1 actuating motor requires to operate from fully closed to fully open.

Note: This item is only available when Bus 1 is set to Mix 1 and the Mixing Expansion Module is set to Floating Action. Availability also depends on the type of mixing module used.

MIX 2 TERMINAL SECTION B

The type of heating terminal units that are being used in Mix 2 zones.

Note: This item is only available when Bus 2 is set to Mix 2.

SECTION G

ADJUST MENU

40 to 100°F

(4.5 to 38.0°C)

Default = 70°F (21.0°C)

70 to 220°F

(21.0 to 104.5°C)

Default = 120°F

(49.0°C)

OFF, 40 to 150°F

(OFF, 4.5 to 65.5°C)

Default = OFF

80 to 220°F, OFF

(26.5 to 104.5°C, OFF)

Default = 140°F

(60.0°C)

InS

MIX 2 INDOOR SECTION B

The design indoor air temperature used in the heat loss calculation for Mix 2 zones. Typically set to 70°F (21.0°C).

Note: This item is only available when Bus 2 is set to Mix 2.

MIX 2 DESIGN SECTION B

The supply water temperature required for the Mix 2 zones on the typical coldest day of the year.

Note: This item is only available when Bus 2 is set to Mix 2.

MIX 2 MINIMUM SECTION G

The minimum allowed Mix 2 target temperature.

Note: This item is only available when Bus 2 is set to Mix 2.

MIX 2 MAXIMUM SECTION G

The maximum allowed Mix 2 target temperature.

Note: This item is only available when Bus 2 is set to Mix 2.

Continued on next page.

Adjust Menu (3 of 7)

Item Field

Range

30 to 230 seconds

Default = 105

1 HRF1 2 HRF2 3 Fancoil 4 Fin-tube Convector 5 Radiator 6 Baseboard

Default = 1

40 to 100°F

(4.5 to 38.0°C)

Default = 70°F (21.0°C)

70 to 220°F

(21.0 to 104.5°C)

Default = 120°F

(49.0°C)

Access Description

MIX 2 MOTOR

The time that the Mix 2 actuating motor requires to operate from fully closed to fully open.

InS

Note: This item is only available when Bus 2 is set to Mix 2, and the Mixing Expansion Module is set to Floating Action. Availability also depends on the type of mixing module used.

MIX 3 TERMINAL SECTION B

The type of heating terminal units that are being used in Mix 3 zones.

Note: This item is only available when Bus 3 is set to Mix 3.

MIX 3 INDOOR SECTION B

The design indoor air temperature used in the heat loss calculation for Mix 3 zones. Typically set to 70°F (21.0°C).

Note: This item is only available when Bus 3 is set to Mix 3.

MIX 3 DESIGN SECTION B

The supply water temperature required for the Mix 3 zones on the typical coldest day of the year.

Note: This item is only available when Bus 3 is set to Mix 3.

SECTION G

ADJUST MENU

OFF, 40 to 150°F

(OFF, 4.5 to 65.5°C)

Default = OFF

80 to 220°F, OFF

(26.5 to 104.5°C, OFF)

Default = 140°F

(60.0°C)

30 to 230 seconds

Default = 105

Au (Auto)

OFF

Default = Au

InS

MIX 3 MINIMUM SECTION G

The minimum allowed Mix 3 target temperature.

Note: This item is only available when Bus 3 is set to Mix 3.

MIX 3 MAXIMUM SECTION G

The maximum allowed Mix 3 target temperature.

Note: This item is only available when Bus 3 is set to Mix 3.

MIX 3 MOTOR SECTION G

The time that the Mix 3 actuating motor requires to operate from fully closed to fully open.

Note: This item is only available when Bus 3 is set to Mix 3, and the Mixing Expansion Module is set to Floating Action. Availability also depends on the type of mixing module used.

BOILER 1 SECTION C

Selects Whether Boiler 1 is operational or not.

Note: This item is only available when the Boil Sensor Sup / Ret DIP Switch is set to Sup, and the tekmar stager DIP switch is set to OFF.

Continued on next page.

Adjust Menu (4 of 7)

Item Field

Range

Au (Auto)

OFF

Default = Au

1 HRF1 2 HRF2 3 Fancoil 4 Fin-tube Convector 5 Radiator 6 Baseboard

Default = 4

40 to 100°F

(4.5 to 38.0°C)

Default = 70°F

(21.0°C)

70 to 220°F

(21.0 to 104.5°C)

Default = 180°F

(82.0°C)

Access Description

BOILER 2

InS

Selects whether Boiler 2 is operational or not.

Note: This item is only available when the Boil Sensor Sup / Ret DIP Switch is set to Sup, and the tekmar stager DIP switch is set to OFF.

BOILER TERMINAL SECTION B

The type of heating terminal units that are being used in boiler zones.

Note: This item is only available when the Boiler Sensor Sup / Ret DIP switch is set to Sup.

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).

Note: This item is only available when the Boiler Sensor Sup / Ret DIP switch is set to Sup.

BOILER DESIGN SECTION B

The supply water temperature required for boiler zones on the typical coldest day of the year.

Note: This item is only available when the Boiler Sensor Sup / Ret DIP switch is set to Sup.

SECTION C

ADJUST MENU

OFF, 80 to 180°F

(OFF, 26.5 to 82.0°C)

Default = 140°F

(60.0°C)

90 to 225°F, OFF

(32.0 to 107.0°C, OFF)

Default = 200°F

(93.5°C)

Au (Auto), 2 to 42°F

(Au, 1 to 23.5°C)

Default = Au

Au (Auto), 0.5 to

20.0 minutes

Default = Au

InS

BOILER MINIMUM

The minimum allowed boiler target temperature and boiler return protection temperature. Check the boiler manufacturer’s manual for recommend supply water temperatures.

BOILER MAXIMUM SECTION C

The maximum allowed boiler target temperature.

Note: This item is only available when the Boiler Sensor Sup / Ret DIP switch is set to Sup and the tekmar stager DIP switch is set to OFF.

BOILER DIFFERENTIAL SECTION C

The temperature differential that the control is to use to cycle the boiler On and Off.

Note: This item is only available when the Boiler Sensor Sup / Ret DIP switch is set to Sup and the tekmar stager DIP switch is set to OFF.

STAGE DELAY SECTION C

The minimum time delay between the operation of stages.

Note: This item is only available when the Boiler Sensor Sup / Ret DIP switch is set to Sup and the tekmar stager DIP switch is set to OFF.

SECTION

Continued on next page.

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