White Rodgers 3098-156, 3098-134 Specifications, Installation, Terminal Designations

SPECIFICATIONS

Type 3098-134 is equipped with a “high-mass” element, and is used in applications where a medium sensor response time (typically 45 to 60 seconds) is desired.

Type 3098-156 contains a “low-mass” element, and is used in applications where a short response time (usually between 30 to 45 seconds) is required.

In general, consideration for response time is based on whether or not the control system uses some form of pre- purge or fan delay timer. Systems using delay timers may require the use of the low-mass 3098-156 so that the element responds to the pilot before the delay time has elapsed.

This is especially true in cases where roof-top units are equipped with delay timers and are subjected to low ambients (20°F or less). The low ambient slightly increases the “heat-up time” for the flame sensor. The use of the 3098-156 reduces the time lag between the original call for heat and the time the main burner comes on. This causes main burner operation to occur shortly before the system blower comes on, preventing cold air drafts on start up.

Electrical Rating: 3 Amps @ 24 VAC 1 Amp @ 120 VAC 0.5 Amps @ 240 VAC

Switch Action: SPDT

Capillary Length: 48 Inches

Sensing Bulb Type: Universal Replacement Thermocouple “slip-in”

Terminal Designations: 2	- Normally Open
3	- Normally Closed
4	- Common

INSTALLATION

!CAUTION

To avoid personal injury and/or property damage, shut off gas and electric to heating system until installation is complete.

1.Turn off gas and power until replacement is complete.

2.Remove defective flame sensor from pilot burner and unplug from gas valve.

3.Align tip of defective flame sensor with tip of replace- ment . Do not uncoil capillary of new flame sensor.

Pin 3

(small)

		Pin 4	N.C.	3
Pin 2	3	(large)
(small)			(COLD)
			2
2		4
			(HOT)	4
			N.O.	(COM)

Internal Schematic

4.Note the location of the C-rings on the defective sensor bulb and install C-rings on the replacement in the same locations.

5.Insert replacement sensor in pilot burner. Uncoil only enough capillary to allow sensor to be installed. Be sure new sensing bulb is in the same position as the unit it is replacing.

6.Carefully uncoil capillary of new sensor by grasping capillary at switchcase and sensing bulb, then “stretch” coil until switchcase reaches gas valve plug. Care- fully align switchcase with gas valve socket and plug flame sensor into valve.

7.Turn on gas and power. Cycle system a number of times to insure proper operation.

MERCURY FLAME SENSOR CROSS REFERENCE

OEM	WHOLESALE	OEM	WHOLESALE
MODEL NO.	REPLACEMENT	MODEL NO.	REPLACEMENT
3098-1￿	3098-134￿	3098-136E1￿	3098-134￿
3098-111	3098-134	3098-136E2	3098-156
3098-117￿	3098-135￿	3098-137￿	None￿
3098-120	3098-135	3098-139	None
3098-122￿	3098-156￿	3098-140￿	3098-140￿
3098-124	3098-156	3098-141	3098-134
3098-126￿	3098-156￿	3098-142￿	3098-156￿
3098-127E1	3098-134	3098-143	3098-156
3098-127E2￿	3098-156￿	3098-144￿	3098-156￿
3098-130	3098-156	3098-147	3098-134
3098-131￿	3098-156￿	3098-148￿	None￿
3098-134	3098-134	3098-149	3098-156
3098-135	3098-135	3098-153	3098-156

Contact the O.E.M. (Original Equipment Manufacturer) for replacements not listed in cross reference

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