MHS Boilers Ultramax WM 100, Operating & Maintenance Manual, Page: 21 / 50

MHS Boilers Ltd ©
191007
21
IV 3 230V - Do Not Use (Not Used With Ultramax Boilers)
IV 4 230V -
Not Generally Used (Multifunctional Relay 3
Output/Secondary Circulating Pump Live Output)
IV 5 230V -
Not Generally Used (Solar Panel Transfer Pump 1 /
Multifunctional Relay 4 Output)
Terminal Designation (Sensor and low voltage terminals)
IX
4 (Polarity
Sensitive)
<25V Yes
+ Control Communication BM8 / E8 / COCO2* (*For Boiler
Control.)
IX
3 (Polarity
Sensitive)
<25V Yes
- Control Communication BM8 / E8 / COCO2* (*For Boiler
Control.)
IX
2 (Polarity
Sensitive)
<25V Yes
L Control Communication BM8 / E8 / COCO2* (*For Boiler
Control.)
IX
1 (Polarity
Sensitive)
<25V Yes
H Control Communication BM8 / E8 / COCO2* (*For Boiler
Control.)
III
3 (F17) & 1
(F15)
<25V Yes
0-10 Volt Control Input (3 + , 1 -) (Parameter alteration
Required)
III
2 ( ) & 3
(F17)
<25V Yes Heating Zone 2 Volt Free Enable (3 + , 2 Ground).
VIII
2 (F14) & 1
(F13)
<25V Yes
Not Generally Used (Solar Panel Sensors / Multifunctional
Relays 3 & 4 inputs)
V 2 (F12) & <25V Yes
Not Generally Used (Solar Vessel Panel Sensors /
Multifunctional Relay 2 input)
V 1 (F11) & <25V Yes
Heating Zone 1 Flow Sensor (VFAS) (Multifunctional Relay 1
input)
I
10 ( ) & 9
(F9)
<25V Yes
Outside Air Sensor (AFS)
(Mounted on North Facing Wall)(BM8 Required to activate
weather compensation)
I
8 (F8) & 7
( )
<25V Yes Low Loss Header Sensor (KFS)
I
6 (F6) & 7
( )
<25V Yes Hot Water Storage Tank Sensor (SPFS)
I
5 (F5) & 4
( )
<25V Yes Heating Zone 2 Flow Sensor (VFAS)
I
3(F3) – 2
( ) (III)
<25V Yes Heating Zone 1 Volt Free Enable (3 + , 2 (Block III) Ground).
I
2(F2) & 1
(F1)
<25V Yes Do Not Use (Not Used With Ultramax Boilers)
VII 2 & 1 <25V Yes Do Not Use (Not Used With Ultramax Boilers)