Detroit Radiant Products Company QTS Series - Manual (Page 33)

QTS Series
33
3.0 Installation • Electrical Requirements • Internal Wiring Diagrams
Figure 3.24 • Internal Ladder Wiring Diagram
1
2
3
4
V1
V2
NC
W (24V IN)
S1
S2
(24V IN) R
GND
GND
CIRCUIT BOARD
DIAGNOSTIC
LIGHT
O O
PR
PR
O
BL
SINGLE-STAGE
GAS VALVE
FLAME SENSOR &
SPARK IGNITOR
FLAME SENSOR &
SPARK IGNITOR
GAS
VALVE
LINE VOLTAGE
120VAC 60Hz
NEUTRAL
POST-PURGE
TIMER
FAN
RELAY
DUAL POLE
RELAY
BL
BK BK
BK
W
O
Y
O
BL
Y
O
Y
GY
BK
BL
BL
BK
W
BK
G
Y
Y
DPDT SWITCH
(24V I/O)
24VAC
CONTROL WIRES
120V/24V
TRANSF.
PRESSURE
SWITCH
BLOWER
MOTOR
BL