NTI FTVN - Page 53

53
Part 7 - Connecting Electrical Service
Connector
Description HT Selv
No. of Location Pin
CN24
ROOM THERMOSTAT
1 +24V
SELV (24V)
2 ROOM THERMOSTAT 1 SIGNAL
NTC SYSTEM
3 +5V
SELV (5V)
4 CASCADE NTC SENSOR SIGNAL
NTC TANK
5 +5V
6 BOILER NTC SENSOR SIGNAL
OUTDOOR SENSOR
7 +5V
8 OUTDOOR NTC SENSOR SIGNAL
ROOM THERMOSTAT 2
9 +24V
SELV (24V)
10 ROOM THERMOSTAT 2 SIGNAL
EBUS2
11 EBUS2 SIGNAL
SELV (24V)
12 GROUND
CN16 FAN MANAGEMENT
1 GROUND
SELV (24V)
2 PWM FAN-DRIVER
3 HALL_EFFECT SENSOR
4 +24V
CN19 EXTERNAL CLIP-IN
1 +24V
SELV (24V - 5V)
2 GROUND
3 CLIP-IN SERIAL TX SIGNAL
4 CLIP-IN SERIAL RX SIGNAL
CN12 HMI
1 +5V
SELV (24V - 5V)
2 GROUND
3 HMI SERIAL TX SIGNAL
4 HMI SERIAL RX SIGNAL
5 +24V
CN22 PWM PUMP
1 PWM PUMP SIGNAL
SELV (24V)2 NOT USED
3 GROUND
CN23 FLAME 1 FLAME SENSOR SIGNAL HT (110Vrms) AC
CN18 SERVICE TOOL SERIAL INTERFACE
1 +5V
SELV (24V - 5V)
2 GROUND
3 MODE
4 SERIAL TX SIGNAL TO PC
5 SERIAL RX SIGNAL FROM PC
6 +24V
Table 19 - Boiler Wiring - 2