Tekmar tekmarNet 402 Quick Setup Manual

Quick Setup Guide

tekmarNet®2 House Control 402

Location1. Install Junction Box2.

HVAC Systems

Q 402

09/10

Replaces: 06/09

Size Transformer3.

Zone

Thermostat Load

Zone Valve Load

Total Zone Load

402

402

1234

Floating

Action (VA)

+ ++++

OR

Control

Load (VA)

2

Transformer

must exceed:

VA

Install Sensors4.

Outdoor Sensors

Sensor with rear
entry wiring

Pipe Sensors

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Retaining Clip

Sensor with bottom
entry wiring

Universal
Sensor 082

Sensor Well

Sensor mounted
onto 2" x 4"
electrical box

Line Voltage Wiring5.

G

L

N

115 V (ac)

Mix

Boil

DHW

(black)

(black)

(black)

(red)

L

(blue)

Variable

N

Speed

to pump grounds

Back of House Control 402

Mix System Pump

Boil System Pump

DHW Pump

Pump Power L

Variable
Speed Pump

Strip wires
1/2 inch (13 mm).
Installed wires are
not removable.
12-18 AWG

Install Enclosure6.

R
C

L

N

Com
Open
Close

Expansion

tN4 Boil

CtN4

Modulating

Boiler

—+

Expansion

tN4 Mix

CtN4

2
1

WC

WC

Menu

House Control 402

Item

+

Mix ComBoil Out DHW

VlvC VlvC VlvC

Zone 3Zone 1 Zone 2 Zone 4

Made in Canada

VlvC

Com

Zone 1

H8007B

Zone 2 Zone 3 Zone 4

tN2 tN2 tN2 tN2 tN2 tN2 tN2 tN2

C

Floating Action

ClsOpn

Sensors - No Power

Call Call

tN4 tN4CC

Mod dc/mA Boil Exp. Mix Exp.

Setpoint DHW

Use at least 167°F
(75°C) conductors

RC

Input Power

Stage 2Stage 1

Low Voltage Wiring7.

Outdoor

Sensor

070

Mix Supply

Sensor 082

Boiler Supply

Sensor 082

DHW Tank

Sensor 082

tekmarNet

®

2 Thermostats

24 V (ac) Floating

Action Actuator

®

tekmarNet

4

Expansion to

Wiring Centers,

Timers, or

User Switch

DHW Call

from DHW

Tank Aquastat

(optional)

Install Cover 8.

Setpoint Call

Zone Valves

Menu

Item

House Control 402

24 V (ac) Transformer 009

One or Two Stage

Boiler T-T

© 2010 Q 402 - 09/10 2 of 4

User Interface9.

Display

Symbols

Calls

Pumps

Menu Field

Displays the

current menu

VIEW
ADJUST

Status Fields

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

CALLS

Displays any call for heat the control is
receiving.

PUMPS

Displays any pump currently operating.

MONITOR

MAXMIN

Calls

Boil Exp

Mix Exp

DHW Setp

Pumps WWSD Saving

Boil System

Mix System Zones

DHW Var 1 2 3 4

°F°C

minhr

sec%

Item Field

Displays the name
of the selected item

min

sec

PM

hr

AM

Number Field

Displays the
current value of
the selected item

Cls

Opn

1 2

Mix

°F, °C, %, HOURS, MINUTES, SECOND

Units of measurement for current number.

UNOCCUPIED

Indicates that a User Switch or Timer has
put the system into UnOccupied.

Zones

1 2 3 4

Saving

WWSD

Access Level10.

ZONES

Displays if an on-board zone is operating.

WARNING

Displays if an error exists on the system.

ENERGY SAVING INDICATOR

Displays when the system is saving
energy. See the Saving Indicator section.

WWSD

Displays when the system is in Warm
Weather Shut Down.

Press menu button until the Toolbox Menu is displayed. Press
item button to locate the access level setting.

Cls

Opn

MAXMIN

BOILER

Indicates that the boiler should be
heating.

DEVICE OUTPUT SCALE

Displays output of the mixing valve or
injection pump.

CLOSE / OPEN

Displays whether the mixing valve motor
is opening or closing.

MIN / MAX

Displays when an operating temperature
reaches a minimum or maximum value.

INST (Installer)

or USER

Default = INST

ACCESS LEVEL

Selects the Access Level of the control, which determines the Menu items
available. USER provides the most limited level of access and shows
the fewest possible items.

When set to USER, all thermostats are locked and the number of
thermostat settings available are reduced.

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Critical Settings11.

Press menu button until the Adjust Menu is displayed. Press item
button to locate the desired setting.

Item Field Range Access Description Set to

ADJUST

ADJUST

ADJUST

-60 to 45°F

(-51.0 to 7.0°C)

Default = 10°F

(-12.0°C)

70 to 180°F

(21.0 to 82.0°C)
Default = 120°F

(49.0°C)

4-20 mA,

0-10 V (dc)

FLOT,

VAR

Default = VAR

Installer

Installer

Installer

OUTDOOR DESIGN

Typically set to the temperature of the coldest day of
the year. The outdoor air temperature used in the boiler
and mixing heating curves that determine the boiler
target and the mix target temperatures.

MIX DESIGN

The supply water temperature required for the mix
zones to heat the building on the typical coldest day
of the year. Recommendations:

High mass radiant floor = 120°F (50°C)
Low mass radiant floor = 140°F (60°C)
Fancoil or air handling unit = 190°F (90°C)
Copper fin-tube convector = 180°F (80°C)
Radiators = 160°F (70°C)
Low profile baseboard = 150°F (65°C)

MIX TYPE

Select the type of mixing device.
VAR = Variable speed injection pump
FLOT = Floating action motor for mixing valves
0-10 = 0 -10 V (dc) analog signal for mixing valves
4-20 = 4-20 mA analog signal for mixing valves
Note: 0-10 and 4-20 are only available when Boiler

Type = 1 Stage or 2 Stage.

EMS2,
EMS1,

4-20
0-10,

2STG,

1STG

Default = 1STG

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

Vernon, B.C. Canada V1B 3K4, 250-545-7749, Fax. [phone] Web Site: www.tekmarcontrols.com

Product design, software and literature are Copyright © 2010 by:
tekmar Control Systems Ltd. and tekmar Control Systems, Inc.

Installer

BOILER TYPE

The type of boiler connected to the control.
1STG = single one-stage on-off boiler
2STG = single two-stage on-off boiler
0-10 = 0-10 V (dc) modulating boiler
4-20 = 4-20 mA modulating boiler
EMS1 = tekmar boiler staging controls
EMS2 = Viessmann modulating boilers with

OpenTherm
Note: Only 1STG and 2STG are available when the

Mix Type is set to 0-10 V (dc) or 4-20 mA.

Head Offi ce: 5100 Silver Star Road,

4 of 4

All specifications are subject to change without notice.

Printed in Canada. Q 402 - 09/10.