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Limited Warranty 

The liability of tekmar under this warranty is lim-

ited. The Purchaser, by taking receipt of any tekmar product (“Prod-
uct”), acknowledges the terms of the Limited Warranty in effect at 
the  time  of  such  Product  sale  &  acknowledges  that  it  has  read  & 
understands same.

The tekmar Limited Warranty to the Purchaser on the Products sold 
hereunder is a manufacturer’s pass-through warranty which the Pur-
chaser is authorized to pass through to its customers. Under the 
Limited Warranty, each tekmar Product is warranted against defects 
in workmanship & materials if the Product is installed & used in com-
pliance with tekmar’s instructions, ordinary wear & 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 instal-
lation 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 & labor provided by tekmar to 
repair defects in materials &/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 defec-
tive product, & such repair, exchange or credit shall be the sole remedy 
available from tekmar, &, 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 mate-
rials, including any liability for fundamental breach of contract.
The pass-through Limited Warranty applies only to those defective Prod-
ucts  returned  to  tekmar  during  the  warranty  period.  This  Limited  War-
ranty 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 & expenses being subject to Purchaser’s agreement & 
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 Lim-
ited Warranty are the Purchaser’s sole responsibility & obligation. Pur-
chaser shall indemnify & hold tekmar harmless from & against any & all 
claims, liabilities & 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 Prod-
uct 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  &/or  the  local  codes 
& 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 & FITNESS FOR A 
PARTICULAR PURPOSE, DURABILITY OR DESCRIPTION OF THE 
PRODUCT, ITS NON-INFRINGEMENT OF ANY RELEVANT PATENTS 
OR TRADEMARKS, & ITS COMPLIANCE WITH OR NON-VIOLATION 
OF  ANY  APPLICABLE  ENVIRONMENTAL,  HEALTH  OR  SAFETY  LEG-
ISLATION; 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 PRODUC-
TION 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 & other contact informa-
tion regarding the appropriate Representative.

Product design, software & literature are Copyright ©2013 by tekmar 
Control Systems Ltd., 

A Watts Water Technologies Company

32 of 32

All specifications are subject to change without notice. 

Printed in Canada. 400_D - 09/13.

tekmar Control Systems Ltd., 

A Watts Water Technologies Company

. Head Offi ce: 5100 Silver Star Road, 

Vernon, B.C. Canada V1B 3K4, 250-545-7749, Fax. 250-545-0650 Web Site: www.tekmarControls.com

Technical Data

tN2 House Control 400

 

Boiler, DHW & Setpoint,

 

Four Zone Valves

 

Literature

400_D, 400_Q, 400_C

Control

Microprocessor control. This is not a safety (limit) control.

Packaged weight

1.4 lb (640 g)

Dimensions

5.5" H x 5.5" W x 2.25" D (140 x 140 x 57 mm)

Enclosure

Blue PC+ABS plastic, NEMA type 1

Approvals

CSA C US, meets class B: ICES & FCC Part 15

Ambient conditions

Indoor use only, 32 to 104°F (0 to 40°C), RH   90% Non-condensing

Power supply

24 V (ac) ±10% 60 Hz, 100 VA max, Class 2

Control load

2 VA

Zone valve load

89 VA, 24 V (ac), 3.7 A for zones 1 to 4

Boiler stage 1, 2 relays

24 V (ac) 5 A

Pump relays

115 V (ac) 5 A, 1/6 hp

Setpoint and DHW calls

Short, 0 - 32 V (ac)

Boiler modulating output

0 - 10 V (dc) 500 Ω min load impedance, 4 - 20 mA 1 kΩ max load impedance

Sensors

NTC thermistor, 10k   @ 77°F (25°C ± 0.2°C) ß=3892

- Included

Outdoor Sensor 070 and Universal Sensor 082

- Optional

tekmar type#: 033, 479

Warranty

Limited 3 Year Warranty

 Limited Warranty and Product Return Procedure 

Summary of Contents for tN2 house control 400

Page 1: ...tion It can be used in applications ranging from a single zone of baseboard with an on off boiler to multiple radiant floor zones with a modulating condensing boiler This control regulates one space h...

Page 2: ...tallers responsibility to ensure that this control is safely installed according to all applicable codes and standards Improper installation and operation of this control could result in damage to the...

Page 3: ...te toutes les exigences du R glement sur le mat riel brouilleur du Canada Radio Frequency Interference Preparation Tools Required tekmar or jeweller screwdriver Phillips head screwdriver Needle nose P...

Page 4: ...if applicable Setpoint Device if applicable Pull three conductor 18 AWG LVT cable for the following equipment tekmarNet 4 Accessories User Switch Timer and Wiring Center Low Voltage Wiring Rough In Wi...

Page 5: ...e L N Figure 3 Connect Line Voltage Hot Strip wires 1 2 inch 13 mm Installed wires are not removable 12 18 AWG DHW Pump Pump Power L 400 Boil System Pump DHW Pump Power Source L N Boil System Pump Fig...

Page 6: ...fasten it to the electrical junction box with 2 10 screws as shown in Figure 5 Install The Enclosure Figure 5 Domestic Hot Water DHW or Setpoint Call When the control receives a DHW Call or Setpoint...

Page 7: ...ectly onto a wall or a 2 x 4 electrical box When the 070 is wall mounted the wiring should enter through the back or bottom of the enclosure Do not mount the 070 with the conduit knockout facing upwar...

Page 8: ...y to the pipe using the cable tie provided Insulation should be placed around the sensor to reduce the effect of air currents on the sensor measurement Immersion Well If a Universal Sensor is mounted...

Page 9: ...asure between 21 6 to 26 4 V ac If the voltage is below this range measure the line voltage side of the transformer The voltage should measure between 103 5 to 126 5 V ac Testing the Thermostats If th...

Page 10: ...by pressing the Item button once the boiler stage 2 turns on Using an electrical meter measure for continuity over the boiler stage 2 terminals Testing the Boiler Modulating Output This test applies f...

Page 11: ...ower H8005B Made in Canada Use at least 167 F 75 C conductors Stage 2 Stage 1 Description The House Control 400 operates an On Off boiler with indirect Domestic Hot Water The boiler is operated using...

Page 12: ...2 18 AWG Expansion tN4 Boil C tN4 Modulating Boiler 1 R C L N 313 red black black Menu House Control 400 Item Com Boil Out DHW Vlv C Vlv C Vlv C Zone 3 Zone 1 Zone 2 Zone 4 Vlv C Com Zone 1 Zone 2 Zon...

Page 13: ...er UNOCCUPIED Indicates that a User Switch or Timer has put the system into UnOccupied BOILER Indicates that the boiler should be heating MAX MIN MIN MAX Displays when an operating temperature reaches...

Page 14: ...ng Select the appropriate menu using the Menu button Select the item using the Item button Use the Up or Down button to make the adjustment Default Item When navigating menus the display reverts back...

Page 15: ...N SECTION E Current percent modulation of the boiler s burner The boiler modulation increases when the boiler supply is less than the boiler target The boiler modulation decreases when the boiler supp...

Page 16: ...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 prof...

Page 17: ...y available when a schedule or User Switch is present on the system Off 1 2 3 4 5 Default 2 Installer DHW MODE SECTION C Selects the DHW mode of operation The mode determines the zone and boiler syste...

Page 18: ...Default 180 F 82 0 C Installer SETPOINT SECTION D The minimum boiler target temperature when a Setpoint Call is present ADJUST F or C Default F Installer User UNITS Selects units for temperature displ...

Page 19: ...NITOR hr Boil System Pumps 0 to 9999 Hours Default 0 hr RUN TIME BOIL SYSTEM PUMP The total running time of the Boil System Pump since this item was last cleared Press and hold the Up and Down buttons...

Page 20: ...access and shows the fewest possible items When set to USER all thermostats are locked and the number of thermostat settings available are reduced OFF SEL Default Off FACTORY DEFAULTS Loads the factor...

Page 21: ...ler target is determined by the control using the boiler heating curve boiler minimum boiler design and outdoor design settings together with indoor temperature feedback from the thermostats The heati...

Page 22: ...DHW MODE 1 DHW in Parallel no Priority When a DHW Call is present the DHW pump is activated The boiler system pump does not turn on but may operate based on either a Boiler or Setpoint Call It is assu...

Page 23: ...nt of time for DHW priority during cold weather During warm weather the DHW priority is 120 minutes During cold weather the DHW priority is 15 minutes Once the allowed time for priority has elapsed th...

Page 24: ...re is a space heating target the boiler operates at that target for 15 minutes If after 15 minutes there is still a Setpoint Call the con trol will shut off all boiler heating zones and target the Set...

Page 25: ...st operate before the internal boiler control allows an external signal to operate the burner After the Modulation Delay has elapsed the control uses PID logic to change the boiler firing rate signal...

Page 26: ...boiler based on the heating load As the load increases the differential will decrease to minimize temperature swings As the load decreases the differential will increase to prevent short cycling This...

Page 27: ...ssary boiler operation the control goes into Warm Weather Shut Down WWSD when the outdoor temperature rises above the WWSD temperature set in the Adjust menu Energy Saving Features Section G Further S...

Page 28: ...for heat the control no longer controls the boiler Instead the control provides a boiler enable and the boiler operates on its aquastat limit until the sensor is repaired The control will not operate...

Page 29: ...t 4 expansion terminals The 400 is a Master Device and no other tekmarNet reset controls can be added to the tekmarNet 4 expansion terminals If one has been added remove it from the system DEVICE ERRO...

Page 30: ...the control is aware that the DHW tank requires heat DHW tank reading Ensure the DHW tank temperature is accurate and replace if necessary Burner symbol on LCD If the burner symbol is on the LCD there...

Page 31: ...Setting OUTDOOR DESIGN BOILER TYPE BOILER DESIGN BOILER MINIMUM BOILER MOTOR MINIMUM MODULATION MODULATION DELAY WWSD OCCUPIED Item Setting WWSD UNOCCUPIED DHW MODE DHW EXCHANGE DHW OCCUPIED DHW UNOCC...

Page 32: ...r 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 tek...

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