D 420
06/05
- Data Brochure
Boiler Reset Module 420
1 of 24 © 2005 D 420 - 06/05
• tN4 Compatible
• Boiler Outdoor Reset
• Single On-Off or Modulating Boiler
• Powered Pump Outputs
• Setpoint Operation
• DHW Operation
• Includes Sensors
Features:
Information
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to match
application
1
Application
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applications
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Wiring
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Wiring and
installation of
specific control
4
Job
Record
Record settings &
wiring details for
future reference
6
Data
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Control settings
and sequence of
operation
5
Rough-in
Wiring
Rough-in
wiring
instructions
3
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
51
52 53 54 55 56 57 58 60 61 62 63 64
Boiler DHW Setpoint C
59
C Com Boil OutVlv
Demand Demand 24 V (ac) DHW
R
65
+
Mod (dc)
–
DHW Primary
10 A
max.
66 67 68 69
N
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
Menu
tektra 991-01
Demands: 20 - 260 V (ac)
Relay Rating: 115 V (ac) 5 A
/
Do not apply power
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