White Rodgers 668 - User Manual

Printed in U.S.A.
PART NO. 37-5456A
Replaces 37-1794 &
37-9517
9510
TYPE 668
Intermittent Ignition* – Non Recycling
OIL BURNER CONTROL
With Series 956 Flame Detector
INSTALLATION INSTRUCTIONS
Operator: Save these instructions for future use!
WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS RD., ST. LOUIS, MO. 63123
(314) 577-1300, Fax (314) 577-1517
9999 HWY. 48, MARKHAM, ONT. L3P 3J3
(905) 475-4653, FAX (905) 475-4625
DESCRIPTION
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
The proper Location and Mounting of the primary oil
burner control panel on the burner and the flame detector
with respect to the oil flame shall be determined by the
furnace, boiler, or burner manufacturer.
If this control, supplied as part of a furnace, boiler or
burner, is wired to the equipment or if the manufacturer
of such equipment provides instructions for wiring this
* Formerly called constant ignition.
SPECIFICATIONS
Electrical Data
Input voltage: 668 120V. AC, 60Hz.
668H 220V. AC, 50/60Hz.
Maximum Load Current:
Oil Burner Motor (Orange Wire):
10 Amps F.L. 60 Amps L.R.
Ignition Transformer:
360VA (3.0 Amps)
Relay Voltage: 668 24 Volts AC, 60Hz.
668H 24 Volts AC, 50/60Hz
Room Thermostat:
Set adjustable heat anticipator at 0.4 Amps. For fixed
anticipation thermostats, use 0.35 to 0.45 Amp.
heater.
Safety Timing:
668, 668H-401 to 499: 45 seconds
668, 668H-501 to 599: 30 seconds
668, 668H-601 to 699: 15 seconds
INSTALLATION AND WIRING
control, then follow his recommendations. If no special
wiring instructions are given, then follow the electrical
connections shown on this diagram for a simple system.
For more complicated systems, especially for hot water
heating, consult the manufacturer of the heating plant for
full details of the desired sequence of control operation.
To prevent electrical shock and/or equipment
damage, disconnect electric power to system, at
main fuse or circuit breaker box, until installation
is complete.
Do not use on circuits exceeding specified volt-
ages. Higher voltages will damage control and
could cause shock or fire hazard.
If in doubt about whether your wiring is millivolt, line, or
low voltage, have it inspected by a qualified heating and
air conditioning contractor, electrician, or someone famil-
iar with basic electricity and wiring.
Do not exceed the specification ratings.
All wiring must conform to local and national electrical
codes and ordinances.
This control is a precision instrument, and should be
handled carefully. Rough handling or distorting compo-
nents could cause the control to malfunction.
CAUTION
!
PRECAUTIONS
WARNING
!
WHITE-RODGERS
The type 668 Oil Burner Control provides safe operation
of oil burners on heating plants where ignition during the
entire burner cycle is desired.
The 668 is used with the 956 Flame Detector

Summary

Description

Precautions

Electrical Safety Precautions

Disconnect power before installation to prevent shock or equipment damage. Follow all codes and ordinances.

Voltage Warning

Do not exceed specified voltages. Higher voltages can cause damage, shock, or fire hazards.

Specifications

Electrical Specifications

Details input voltage, maximum load current, ignition transformer, and relay voltage ratings.

Thermostat Settings

Set adjustable heat anticipator at 0.4 Amps or 0.35-0.45 Amp for fixed anticipation thermostats.

Safety Timing Specifications

Specifies safety timing for different model series (45, 30, or 15 seconds).

Installation and Wiring

Testing Procedures

Normal Operation Cycle Test

Verifies the burner starts and runs normally during its cycle. Check flame detector if lockout occurs.

Safety Timing Verification

Tests the control's safety lockout by removing flame detector leads during operation.

High Limit and Thermostat Check

Ensures burner stops/starts correctly when high limit or thermostat settings are adjusted.

Flame Detector Check

Diagnoses flame detector issues when the control locks out, using a jumper wire.

Flame Detector Jumper Warning

Warning: Do not leave burner in this condition with jumper installed as safety protection is disabled.

Flame Detector Troubleshooting

Resistance and Alignment Checks

Check detector resistance (<1000 ohms) and alignment. Clean static pressure disc hole if blocked.

Flame Detector Lead Check

Check for broken 'F' wires and test continuity with a jumper wire to ensure burner runs.

Flame Detector Warning

Ensure the wire jumper is removed after completing the flame detector check.

White Rodgers 668 Specifications

General

Brand	White Rodgers
Model	668
Category	Controller
Language	English