Honeywell R8991 Manual Download Page 1

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69-0669B—2

2. Check ratings given in these instructions and on prod-

uct to make sure product is suitable for your application.

3. Make sure installer is a trained, experienced service

technician.

4. After completing installation, use these instructions to

check out product operation.

CAUTION

1. Disconnect power supply before beginning in-

stallation to prevent electrical shock or equip-
ment damage.

2. Ensure combustion chamber is free of oil or oil

vapor before starting system.

LOCATION

The R8991 Interrupted Ignition Recycle Oil Primary and

Ignitor mounts directly on top of the main burner housing.
See Fig. 1 for a typical mounting. Your control can be
mounted differently, depending on the burner manufacturer.

MOUNTING AND LINE VOLTAGE WIRING
CONNECTIONS

Mount hinged side of R8991 control on burner housing.

See Fig. 1. The hinge should be in the open position for
easiest installation and wiring.

IMPORTANT: Before securing the R8991 on the burner

housing, make sure all wires are located within the
wiring enclosure area and are not pinched by the
edges of the burner housing, or R8991, or cad cell
bracket assembly.

WARNING

HAZARDOUS VOLTAGE MAY BE
PRESENT AT TERMINALS.
CAN CAUSE SEVERE INJURY OR
EQUIPMENT DAMAGE.
Make sure all wiring connections are as shown in
Fig. 2. Incorrect wiring connections can cause the
ignition to be on continuously.

All wiring must comply with local codes and ordinances.
1. Make sure all line voltage connections are in wiring

enclosure area at the rear of the burner housing.

G.R. • Rev. 3-95 • ©Honeywell Inc. 1995 • Form Number 69-0669B—2

R8991

Interrupted Ignition Recycle

Oil Primary and Ignitor

Application

The R8991 Interrupted Ignition Recycle Oil Primary and

Ignitor consists of an interrupted ignition oil primary, solid-
state ignition source and cad cell flame sensor for mounting
directly on an oil burner housing. This single-unit control
(primary and ignitor) operates the oil burner and oil valve
(if desired) in response to a call for heat from the thermo-
stat. The R8991 monitors the burner flame and shuts down
the system on ignition failure (lockout) or on flame failure
during the run cycle. On flame failure during the run cycle,
the control enters a recycle period; during the recycle period,
the control will not attempt to light. A manual reset button is
provided to reset the control after lockout. The reset button
may also be used to return the R8991 to the idle mode during
the trial for ignition, ignition carryover or run mode. If
ignition is successful, the control continues to provide spark
for a period (ignition carryover) after flame is sensed.

An indicator light provides the following lockout and

cad cell indications:

Flashing at 2 Hz (1/4 second on, 1/4 second off): System

is locked out.

Flashing at 1/4 Hz (2 seconds on, 2 seconds off): Control

is in the recycle mode.

On: Cad cell is sensing flame.
Off: Cad cell is not sensing flame.

SPECIFICATIONS:

Lockout Time: 15, 30, or 45 seconds.
Recycle Time: 60 seconds.
Ignition Carryover Time: 45 seconds.

APPROVALS:

Underwriters Laboratories Inc. Listed: File no. MP286,

guide MCCZ2.