D 422
08/07
- Data Brochure
Universal Reset Module 422
1 of 32
© 2007
D 422 - 08/07
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tN4 Compatible
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Two Outdoor Reset Temperatures
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Single On-Off or Modulating Boiler
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Powered Pump Outputs
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DHW Operation
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Variable Speed Injection Pump
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Floating Action Valve
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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 Universal Reset Module 422 provides outdoor reset to a hydronic heating system in order to maximize comfort and
efficiency. The 422 can operate a single on / off boiler or a single modulating boiler. The 422 can override the outdoor reset
water temperature to provide Domestic Hot Water or Setpoint operations. The 422 can operate two outdoor reset water
temperatures, either one boiler water temperature and a single mix water temperature, or two mix water temperatures. To
operate two mixing devices, a Mixing Expansion Module must be connected to the 422. The single mix output can operate
a floating action mixing valve or a variable speed injection pump.
Introduction
51 52
53 54 55
56
57 58 59 60
61
62
63 64 65
Boiler
DHW
Setpoint
C
C2
tN4
C
Com Boil Mix Com Out
+
Opn Cls
Demand
Demand
24 V (ac)
Boil/Mix2
R
R
Mod (dc)
R
66 67 68 69 70
–
Primary
Mix Sys P1
10 A
max.
75
76
77
78
N
N
DHW
Variable Speed
71
72
73
74
Pump
Pump
N
Pump
N
Pump
tN4
H7008B
tN4 Boiler / Mix 2
Boil Sens Sup / Ret
Boiler On-Off / Mod
Off / tekmar Stager
Off / Flushing
Powered Output
Output 1 VA
Floating Output:
24 V (ac) 8 VA
Made in Canada
Meets Class B: Canadian
ICES & FCC Part 15
Test
Var. Pump Fuse
T2.5 A 250 V
Universal Reset Module 422
Item
Menu
tektra 991-03
Var. Pump: 115 V (ac) 2.5 A
Demands: 20 - 260 V (ac)
Relay Rating: 115 V (ac) 5 A
/
Do not apply power
2.5 A
