Страница 1: ...cal short or ground results in safety shutdown 0 Ignition is started main burner is ignitied burner flame is proved and continuously monitored during main burner on period lg nition spark is discontinued when flame is proved CONVENIENT REMOTE RESTART PROCEDURE 0 After safety shutdown equipment must be manually reset from remote thermostat or temperature controller 0 System automatically locks out ...
Страница 2: ...7 Normally closed contacts in internal relay may be used for an alarm circuit to signal safety shutdown of system ELECTRICAL RATINGS Voltage and Frequency 24 Vat 60 Hz Current Rating O 2 A plus gas valve current draw SAFETY LOCKOUT TIMING 11 seconds FLAME FAILURE REIGNITION TIME 0 8 seconds maximum FLAME CURRENT SIGNAL REQUIRED 1 5 YA dc minimum SPARK GENERATOR VOLTAGE 15 000 V open circuit MOUNTI...
Страница 3: ...he Q354A consists of a flame rod supported in a ceramic insulator with mounting bracket Positioned so that the end of the flame rod is immersed in the main burner flame and with the burner head serving as the ground area it operates on the flame rectification principle In the presence of main burner flame a direct current is established to prove burner ignition and to continuously monitor the flam...
Страница 4: ...ion 2 Check the ratings given in the instructions and on the product to make sure it is suitable for your application 3 The installer must be a trained experienced service technician 4 After installation is complete check out system operation 1 Disconnect power supply before wiring to pre vent electrical shock or equipment damage 2 If a new gas control is to be installed turn off gas supply before...
Страница 5: ...e appliance manufacturer if available for circuits differing from the ones shown in this publication Carefully follow all instructions af fecting the general procedures outlined below All wiring must comply with applicable elec trical codes and ordinances Disconnect the power supply before wiring to prevent electrical shock and equipment damage The flame sensor leadwire should be kept as short as ...
Страница 6: ...ALVE 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...
Страница 7: ...FIG B WIRING HOOKUP FOR Y343B PACKAGE IN A TYPICAL TWO STAGE DSI HEATING SYSTEM I II xI j _ CI x x _ IX _ FIG 7 S67D SIMPLIFIED SCHEMATIC DIAGRAM 7 66 00 4 ...
Страница 8: ...rk cutoff manually reopen gas supply cock No gas should flow to the main burner 5 Reset system as described below RESET S87 AFTER SAFETY LOCKOUT If the control goes into safety lockout it will remain locked out until the system is reset To reset the system adjust the thermostat setting below room temperature wait 30 seconds and move the thermostat setting up to call for heat Normal ignition should...
Страница 9: ...flame sensor and its mounting bracket Correct the position if bent out of shape 8 Review the S87 normal sequence of operation See START SYSTEM section S87D COMPONENT CHECKS SPARK IGNITION CIRCUIT The step up transformer in the S87 provides spark ignition at 15 000 volts open circuit To check the spark ignition circuit proceed as follows 1 Shut off gas supply to the gas control 2 Disconnect the ign...
Страница 10: ...1 5 uA or unsteady see LOW OR UNSTEADY FLAME CURRENT section below FLAME SENSOR CURRENT CHECK USE YA SCALE FIG g S87 FLAME CURRENT MEASUREMENT LOW OR UNSTEADY FLAME CURRENT If the current to the S87D flame circuit is less than 1 5 AIA or is unsteady check the burner flame and flame sensor location and electrical connections as follows Burner Flame The flame sensor must be constantly immersed in fl...
Страница 11: ...the tenance or repair the troubleshooting sequence should boxes If the condition is true or okay answer is yes go be repeated until normal system operation is obtained TABLE 4 537 DIRECT SPARK IGNITION SYSTEM TROUBLESHOOTING DIRECT SPARK IGNITIDN SYSTEM TROUBLESHOOTING TABLE I NOTE BEFORE TRO BLE HOOTING BE S RE START UP AND CHECKOUT START PROCEDURE HAS BEEN COYPLETEO I I TRO BLESHOOTlNG ENDS 1 RE...
