129
Appendixes
12.3 Ladder Diagram
UART
Communication
Interface
CASCADE
(RS-485)
Front Panel
Communication
Interface
Air Handler
Output
DHW Priority
Terminal Board
Relay 7
Output
Relay 8
Zone2 Thermostat
R,W,C
LIVE NEUTRAL
DC24V
DC12V
DC5V
DC9V
H.T.L(HE)
Fan
Speed Control
Primary
WPS
Fan
Hall Sensor
Exhaust
Thermistor 2
Exhaust
Thermistor 1
Heating Supply
Thermistor
PWM
SMPS
Primary
Secondary
Dip Switch
Zone1 Thermostat
R,W,C
LWCO
Flame Rod
Linear
Trans
AC 24V
AC INPUT(AC 120V)
3.
15
A
Relay 3
Boiler Pump
10A
10A
10A
ZONE1 Pump
(DHW Tank)
Relay 2
ZONE3 Pump
(System)
Relay 1
ZONE2 Pump
H.T.L(BH)
Heating Return
Thermistor
System Return
Thermistor
DHW Tank
Thermistor
System Supply
Thermistor
Outdoor
Thermistor
1 2 3 4 5 6
O
N
O
N
1 2 3 4 5 6 7 8
APS
VID
WD-PSS
Gas Valve
Relay 1
Relay 2
Relay 3
Relay 4
Relay 5
Relay 6
Relay 7
Relay 8
Relay 9
Relay 10
MCU 1
MCU 2
Terminal Board
LIVE NEUTRAL
AC INPUT(AC 120 V)
10A
Relay 4
Dual Venturi
Relay 5
Relay 6
Igniter
DC15V
Zone3 Thermostat
R,W,C
R,W,C
DHW Thermostat
Zone Valve 1
Zone Valve 2
20
A
Zone Valve 3
EMI
FILTER
Relay 9
Relay 10
Relay 11
Relay 11
Содержание NHB H Series
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