Install Instructions

4-pin Connector

(#2)

4-pin Connector

(#1)

Integrated Control

Module

Wiring Harness

Testing:

1. DO NOT ﬁ ll the boiler. Set the thermostat to lowest possible setting and turn on electric power to the boiler. On

initial start-up, the LTR indicates a low water condition, which indicates proper function. The "STATUS" LED on the

control unit illuminates RED. The burner should not operate without water in the system.

2. Fill boiler with water. Once water covers the probe, the "STATUS" LED on the control turns from RED to GREEN.

3. Set the thermostat to call for heat. Verify that the burner ignites.

4. With the burner aﬂ ame, press and hold the test switch while observing the burner and the "STATUS" LED on the

LTR. After the "STATUS" LED illuminates RED, the burner turns off.

5. Release the test switch and verify that the burner ignites (provided water covers the probe). The "STATUS" LED on

the control unit turns from RED to GREEN.

6. If burner fails to cutoff or relight, see the Troubleshooting section for details. Otherwise, set the thermostat to its

normal setting.

NOTE: Once correct operation of the LTR has been tested, test all other safety, limit, and control devices before

ﬁ nalizing system operation.

Cleaning, Maintenance, and Replacemet:

Test the operation of the LTR annually, or more frequently, by pressing the “TEST” button. The “STATUS” LED should

turn RED and the boiler should shut down.

Probe must be inspected every 5 years, (or sooner if “SERVICE” LED turns on), for scale build-up or coating. Clean

all oils, ﬂ uxes, and scale from probe with a clean rag.

The control unit should be replaced every 15 years. In areas of high humidity, heavy dust, or other airborne

contaminants more frequent replacement may be required.

Ordering Information:

Replacement Cables:

9300-2714RP - Standard Wire Harness

9300-2715RP - Wire Harness for United Technologies

Integrated Boiler Control

9300-2774RP - OEM 4-pin Harness

Wiring Boilers with an Integrated Control Module

and OEM 4-pin Harness:

Wiring Instructions

1. Plug the 4-pin connector on the wiring harness (#1 as

shown) into the integrated control module.

2. Plug the 4-pin connector on the wiring harness (#2 as

shown) into the LTR.