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Q354A FLAME SENSOR
1. Mate quick-connect
terminals
(l/4
in. [6.4 mmf)'
are provided
on both the Q354 and S87D. Connect the
SENSOR terminal
on the 587 to the terminal
on the
Q354 as shown in Fig. 4. Use thermoplastic
insulated
wire with a minimum
rating of 105 C [221 F] for the
flame
sensor
leadwire;
asbestos
insulation
is not
acceptable.
AUXILIARY CONTROLS
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
limit 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.
IOTOR
PRESSURE
FOR VALVE
AN0
WRNER
HOOKUP.
SEE FIG. 4 AND 7.
n
1
POWER SUPPLY.
PROVIDE 01SCONNECT MEANS
AND OVERLOAD
PROTECTlON
AS REQVIRED.
n 2
OPTIONAL
LlMlT
CONTROLLER
l_OCATION.
I I .3*1
FIG. 6-WIRING
HOOKUP FOR Y343B PACKAGE IN A TYPICAL HEATING- COOLING SYSTEM.
6
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