tekmar 421 Mixing Reset Module User Manual
Page 2
© 2007
D 421 - 08/07
2 of 20
Table of Contents
Table of Contents ...........................................................2
Display and DIP Switches ..............................................2
Dip Switch Settings ................................................2
Access
Level
...........................................................3
Display and Symbols Description............................4
User Interface ........................................................5
Display Menus ................................................................6
View
Menu
..............................................................6
Adjust
Menu
............................................................7
Miscellaneous
Menu
...............................................9
Testing the Control .........................................................9
Sequence of Operation ................................................. 11
tekmarNet
®
4 Communication ............................... 11
Outdoor Reset ...................................................... 11
Mixing
Operation
.................................................. 13
Boiler Temperature Control .................................. 14
Boiler
Enable
......................................................... 15
Pump
Operation
................................................... 15
Pump
Exercising
................................................... 15
Error Messages ............................................................ 16
Troubleshooting ............................................................ 19
Warranty .......................................................................20
Set the DIP switch settings prior to making adjustments
to the control through the user interface. Setting the DIP
switches determines which menu items are displayed in
the user interface.
If you change a DIP switch setting while the control is
powered up, the LCD display returns to the View menu.
Lock / Unlock
Use the Lock / Unlock DIP switch to lock and unlock the Access
Level of the 421 and all connected tN4 devices, including
tN4 thermostats. For details, see “Access Levels”
•
• Once locked, the access level in all devices cannot be
viewed or changed.
•
• To determine if the control is currently locked a small
segment representing a padlock is viewed in the bottom
right hand corner of the display.
•
• To unlock the Access Level, set the DIP switch to
Unlock.
•
• To lock the Access Level, set the DIP switch to Lock.
Dip Switch Settings
Display and DIP Switches
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
Boil Sens Sup / Ret
Off / Flushing
/