tekmar 421 Mixing Reset Module - Manual

D 421
08/07
- Data Brochure
Mixing Reset Module 421
1 of 20 © 2007 D 421 - 08/07
• • tN4 Compatible
•
• Outdoor Reset
•
• Single On-Off Boiler
•
• Powered Pump Outputs
• • Variable Speed Injection Pump
•
• Floating Action Valve
•
• Includes Sensors
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 Mixing Reset Module 421 provides outdoor reset to a hydronic heating system in order to maximize comfort and
efficiency. The 421 can operate a single on / off boiler and a single mix water temperature. The mix output can operate a
floating action mixing valve or a variable speed injection pump.
Introduction
51 52 55 56 57
Boiler
54 53
C Com Boil Mix Cls Opn
58
R R
59
Com Out
60
Variable Speed
2.5 A
7.5 A
max 61 62
N Pump
tN4
Boil Sens Sup / Ret
Off / Flushing
Powered Output
Floating Output:
24 V (ac) 8 VA
Made in Canada
Meets Class B: Canadian
ICES & FCC Part 15
Test
Mixing Reset Module 421
Item
Menu
tektra 991-02
Var. Pump: 115V (ac) 2.5 A
Relay Rating: 115V (ac) 5 A
/
Do not apply power
System P1
63 64
N Pump
Var. Pump Fuse
T2.5 A 250 V
H700
7B