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Model 50200 CAD Cell Oil
Primary Control Data Sheet
• Interrupted Duty Ignition
• Recycle on Flame Failure
• Serviceman Reset Protection
Latch-up after 3 consecutive lockouts
• Diagnostic LEDs
Status, lockout, flame
• 15-second, 30-second TFI
• Thermostat/Aquastat Compatible
• SMC Technology
• Pump Prime
• Alarm Contacts
Power input (from limit circuit)
120 VAC, 60 HZ, 9VA
Motor load
10 FLA / 60 LRA
Ignitor load
120 VAC, 60 HZ, 500 VA
Alarm contacts
24 V, AC/DC, 2A
Operating temperature limits
+32°F to +140°F
Storage temperature limits
-40°F to +185°F
Thermostat anticipator current
0.1 A, AC
CAD cell resistance (with flame)
R < 1500 OHMS
Agencies
UL recognized (US & Canada)
Installing and Wiring
50200 control must be installed and serviced only by a qualified service technician.
1. Always disconnect power source before wiring to avoid electrical shock or damage to the control. All wiring must comply with
applicable codes and ordinances.
2. Thermostat terminals (T-T) provide a current source. Never apply external power to these terminals under any circumstances.
3. Alarm terminals provide a 24 VAC/VDC-rated dry contact, suitable for use with security/fire alarm systems.
Mounting
• The control may be mounted on a 4" x 4" junction box in any convenient location on the burner, furnace or wall. The location
must not exceed the ambient temperature limit, 140°F.
Wiring
• Wiring must comply with local and national electrical codes, and with the wiring diagram.
• Individual or bundled neutrals may be attached to any L2 terminal.
Field checks
1.
Safety timing (TFI) test – Remove one CAD cell wire (F-F). Start burner. The control should lockout within the TFI time limit.
Replace CAD cell wire.
2.
Flame failure test – Start burner. After flame is established (after TFI period), close the oil supply hand valve. This will cause a
flame failure sequence as described in the Startup & Operation section of this Data sheet. The control should recycle (restart
after 65 seconds).
3. If control does not operate as described, check the wiring.
SEE WIRING DIAGRAM ON NEXT PAGE
