14
B6
B6
B6
B5
B7
B4
B3
B2
B1
7.3. Control terminals and user connections
Control board terminal blocks
Abbreviation
Definition
Terminals
Connection
ADP
Fire service remote stop
21-22
To be connected to the terminals of an NC contact of the fire
service remote stop.
(Shunt between terminals 21 -22 on release from factory)
THA
Anti-freeze thermostat
24-28
To be connected to the NC contact of the anti-freeze
protection thermostat THA
(PREMIUM BC and INFINITE BC versions of units equipped
with a hot coil)
HRT
Safety thermostat
24-28
To be connected to the NC contact of the safety thermostat
THS
(PREMIUM BE and INFINITE BE versions units equipped with
an electric heating coil)
MF PV
Low-speed forced
operation
DI3 controller
+ 73
To be connected to an external NO dry contact (normally
open)
MF GV
Low-speed forced
operation
DI4 controller
+ 74
To be connected to an external NO dry contact (normally
open)
ARR EXT
External stop
DI5 controller
+ 75
To be connected to an external NO dry contact (normally
open)
V3V BC
3-way valve Hot water
heating coil
AO1 controller
+ 76 + 78
To be connected to the modulating 3-way valve of the hot
water coil (see XIX CUSTOMER CONNECTIONS WIRING
DIAGRAM)
AL
Alarm reporting
DO5 controller
+ 47
24 V output available if the unit is faulty
(Note 24 Vac output to be relayed)
31 32 33 34
46 47 48 49
35 36 37 38 39
50 51 52 53 54
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
40 41 42
55 56 57
43 44 45
58 59 60
68 69 70
78 79 80
61 62 63 64 65
71 72 73 74 75
68 69
78 79
1 2 3 4 5 6 7
Zehnder Eversky