Q354a flame sensor – Honeywell Y343B1002 User Manual
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Q354A FLAME SENSOR
1. Mate quick-connect terminals (1/4 in. [6.4 mm})'
are provided on both the Q354 and S87D. Connect the
SENSOR terminal on the S87 to the terminal on the
Q354 as shown in Fig. 4. Use thermopiastic insulated
wire with a minimum rating of 105 C [221 F] for the
fiame sensor ieadwire; asbestos insulation is not
acceptabie.
The auxiliary controls (transformer, thermostat,
limit) must be connected to the 24 V terminal,
gas valve must be connected to the VALVE
terminals and the alarm control to the ALARM
terminal on the S87D. Only one side of the
transformer secondary can be connected to the
24 V (GND) terminal. A short to ground could
cause the system to malfunction.
Connect the system transformer, thermostat, high
temperature iimit controller, combination gas valve and
alarm (if used) as shown in Fig. 4.
FIG. 4—WIRING HOOKUP FOR Y343B PACKAGE IN A
TYPICAL DSI HEATING SYSTEM.
FIG. 5—WIRING HOOKUP FOR Y343B PACKAGE IN A TYPICAL HEATING- COOLING SYSTEM.