Honeywell R4348B Product Handbook

1 EN1C-9999SZ22 R1104

R4348B

INDUSTRIAL FLAME SWITCH

PRODUCT HAND BOOK

APPLICATION

The R4348B flame switch is for application in large com­mercial and industrial burner installations.
The function is:

flame safeguard primary controls capable of providing
system „safe start“ check and flame sensing functions.

The unit can also be used in installations using an EC7800
microcomputer-based burner control system - to extend the
number of burners being controlled.

The unit includes a 3-pole flame relay which is energized when
flame is sensed and de-energized when „no-flame“ is sensed
and a 3-pole line voltage „load relay“.

• Standard is a green LED which is illuminated when the
flame relay is energized.

• R4348B1057 only:
– LED bar and 4-20mA output for indicating and / or

recording the flame current strength.

• Unpowered relay outputs enable Honeywell sensors
and amplifiers to be used with a wide range of logic
schemes according to customer needs.

• Plug-in unit makes wiring and servicing easy.

• Plug-in flame signal amplifiers available to match a wide
range of flame sensors.

EN1C-9999SZ22 R1104 2

SPECIFICATIONS

WARNING

To avoid the risk of electrical shock which could
cause personal injury, follow all safety notices in this
documentation.

MODEL:

R4348B industrial flame switch with 3-pole flame relay
and 3-pole load relay

1)

see OPTIONS also

ELECTRICAL RATINGS:

can operate on 110V - 120V - 127V - 230V 50/60Hz

POWER CONSUMPTION:

less than 15VA

ENCLOSURE:

IP40 or IP54 depending on the model and base

AMBIENT TEMPERATURE LIMITS:

Operating: - 20°C to + 60°C.
Storage: - 40°C to + 80°

CLASSIFICATION:

OOCRXB

APPROVALS:

Installation and cabling for both intermittent and
continuous operations must be in accordance with
relevant standards (i.e. EN298)

OPTIONS: (see MODELS also)

LED-METER. A series of color coded LED’s on the face of
the unit which give a direct indication of flame current
strength.
Green LED’s indicate normal flame current strength. Yellow
LED’s indicate marginal signals. Red LED’s indicate
unsatisfactory flame signal strength (see fig. 2).

4-20mA OUTPUT. The flame current value can be
registered and/or displayed at a local or remote location.
Load : 0 to 750Ω.

.

CONTACT RATINGS:

If more than one safety shut-off valve is to be actuated by
the R4348 it is recommended to use separate relay contacts
rather than paralleling from one contact.

MAXIMUM RELATIVE HUMIDITY:

90 % RH at 40oC (not to exceed saturation point)

WEIGHT : 1,5 Kg

FLAME SENSORS AND AMPLIFIERS :

will accept any of the plug-in amplifiers and appropriate
sensor listed .

FLAME INDICATION :

Green LED on face of unit when illuminated indicates
presence of flame. Relay contact enables remote indica­tion of flame presence to be made.

MOUNTING :

Can be wall, DIN rail of panel mounted.

Subbase: 46176612-501

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3 EN1C-9999SZ22 R1104

FIG. 1 Dimensions in mm.

FIG.2 Main features

ACCESSORIES:

Subbase : 46176612-501 : for IP40 (to be ordered separately)

158

88

88

TOP VIEW

11x Pg11

ø4,5

3015

30

30

45

82

200

100

15

45

20 (minimum) required for unplugging
R4348B from the subbase

20

Front view

Rear view

subbase