tekmar 402 House Control Installation - Manual

1 of 32 © 2010 D 402 - 09/10
tekmarNet ® 2 House Control 402
D 402
09/10
HVAC Systems Replaces: 01/10
Installation & Operation Manual
Menu
House Control 402
Item
VIEW
Boil Exp Boil System
Zones
1 2 3 4
Calls Pumps
Benefi ts
Energy efficiency through Outdoor Temperature
Reset with Indoor Feedback
Indoor Feedback minimizes the water temperature
(increasing energy savings), and the efficiency of
your mechanical equipment through integrated
tekmarNet
® Thermostats
Zone Synchronization reduces equipment cycling
Auto Differential - Reduces boiler cycling
Compact enclosure for flexible installation
Simple zone expansion using Wiring Centers
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The House Control 402 is designed to operate as part of a
complete hydronic heating system with tekmarNet
® 2 (tN2)
thermostats. It can provide operation of two outdoor reset
water temperatures such as radiant floor heating on the first
temperature and baseboard or fan coil heating on the second
temperature. In addition the control has Domestic Hot Water
and Setpoint capabilities. It is easy to add more zones, add
schedules or other convenient accessories through the use
of the tekmarNet
® 4 (tN4) Expansion terminals.
Features
Single on-off, two-stage or modulating boiler
Boiler outdoor reset temperature
Mixing outdoor reset temperature
Domestic Hot Water tank operation
Setpoint operation
Mix with variable speed injection, floating action,
or proportional 0-10 V (dc), proportional 4-20 mA
For use with tekmarNet
® 2 Thermostats
Four 24 V (ac) powered zone valve outputs
Expand to 24 zones per temperature using
tekmarNet
® 4 expansion ports
CSA C US Certified for use in USA and Canada
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Introduction