tekmar 423 Universal Reset Module - Manual

D 423
08/07
- Data Brochure
Universal Reset Module 423
1 of 36 © 2007 D 423 - 08/07
• • 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
Features:
Information
Brochure
Choose controls
to match
application
1
Application
Brochure
Design your
mechanical
applications
2
Wiring
Brochure
Wiring and
installation of
specific control
4
Job
Record
Record settings &
wiring details for
future reference
6
Data
Brochure
Control settings
and sequence of
operation
5
Rough-in
Wiring
Rough-in
wiring
instructions
3
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.
Introduction
50 51 52 53
Stage1/ Stage 2/
Boil Enbl Setp Enbl
75 76 77 78
Demand Demand
DHW Setpoint
54 55
DHW Primary
10 A
max 79 80 81 82
N Pump N Pump
tN4
Made in Canada
8 VA 1 VA
Boil Sens Sup / Ret
H70
10A
Off / DHW Sensor
Off / tekmar Stager
Boilers On-Off / Mod
Off / Rotation
Meets Class B: Canadian
ICES & FCC Part 15
Powered
Outputs
24 V (ac)
Universal Reset Module 423
Item
Menu
tektra 1006-01
Demands: 20 - 260 V (ac)
Relay Rating: 115 V (ac) 5 A
71 72 73 74
DHW 24 V (ac)
/
57 58 59 60 61 56
C
C
tN4
Mod2 (dc) Mod1 (dc)
65 64
C3 C1 + –
C
+ – tN4
62 63
C2 tN4 tN4
66 67
DHW Com
Boiler
68 69
Boil Com
70
Out
Do not apply power
Test
1 2 3
Vlv R