© 2019 tekmar 304V_D - 10/19
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• Set boiler PIM DIP switch 2 to Down.
• Set boiler PIM DIP switch 5 to Up.
• Set boiler PIM DIP switch 2 to Down.
• Set boiler PIM DIP switch 5 to Up.
• Use Local Priority 1 for DHW tank heating.
• Use Local Priority 2 for the RoomResponse
TM
signal.
• Set Local Priority 2 Supply Min to 60°F.
• Set Local Priority 2 Supply Max to 180°F.
• Set Local Priority 2 Volts For Min to 2 V.
• Set Local Priority 2 Volts For Max to 10 V.
• Install the OpenTherm Module as per the boiler manufac-
turer's instructions.
Raypak MVB or
XTherm
Raypak XFyre or
XPakFT
304V
304V
J2
J1
+
–
X
X
–
+
13 14 17 18
+
–
X
X
–
+
T
T
8 9
9 10
Viessmann
OpenTherm Module
Viessmann
Extension Module EA1
Plug 0-10V
Weil-McLain
Evergreen P15
304V
304V
304V
+
–
1
–
4
+
+
–
1
–
2
+
+
–
5
+
6
–
• Connect to the Viessmann Extension Module EA1 Plug 0-10V.
Viessmann Vitodens 100-W, WB1B
--------------
Weil-McLain Evergreen
--------------------------
Raypak MVB and XTherm
-----------------------
Raypak XFyre and XPakFT
----------------------
Viessmann Vitodens 200-W, B2HP and
Vitocrossal 300 CU3A
---------------------------