Beckett AquaSmart 2N1 User Manual

AQUASMARTTM 2-IN-1 SENSOR (Temperature & Presence of Water)

Installation Instructions

Do not use in steam applications. For use in hot water boilers or water heaters only. Do not use outside of the intended use and speciﬁ cations.

PARTS:

(1) 76002N1SXX 2-IN-1 Sensor (1) 32704 Pipe Clamp for sensor ground (1) 3214771 36” Green Ground Wire

Explosion, Burn and Scald Hazards

Excessive water temperatures could cause explosion, burns, scalding, pressure relief ﬂ ooding and ﬁ tting leaks.

The 2-in-1 Sensor shall only be installed by a trained

professional. The sensor must be installed in the proper location for

correct low water cut-off (LWCO) operation in accordance with the Boiler Manufacturer’s instructions.

The 2-in-1 sensor body is installed directly into the

boiler wall tapped hole in place of an immersion well. Carefully follow the outlined procedures for temperature

sensor installation to ensure accurate water temperature sensing and effective control operation.

Make sure the plumbing for domestic hot water has anti-

scald valve protection. Follow all applicable safety codes, rules and guidelines

for installing an immersion well. Improper installation can result in the Boiler overheating.

Part # Lead Length

76002N1S01 8-1/4” 1-1/2” 1-5/8” 76002N1S02 6-1/4” 3-1/2” 1-5/8” 76002N1S05 5.0” 4-3/4” 1-5/8” 76002N1S06 8-1/4” 1-1/2” 7/8”

Insulation Depth

(A)

Insertion Depth

(B)

Technical Speciﬁ cations

Storage Temp. Range:

Operating Temp. Range:

Maximum Pressure:

Installation(screw-in)Torque Range:

-40°F to 250°F 32°F to 250°F 250 PSIG

185-200 in/lbs

Leak, Burn, and Scald Hazards

Incompatible thread sealants could severely damage the sensor threads.

Only use Teﬂ on®

DO NOT use any anaerobic fast-setting sealants such

as, but not limited to, Loctite®, Leak Lock®, Permatex®, or Gasoila®.

Call RWB Technical Services at 1(800)645-2876 to

conﬁ rm, if unsure.

Tape or Rectroseal® No. 5® (soft-set).

For proper operation, there must be

a secure electrical bond between the green sensor wire from the sensor and the boiler metal vessel in direct contact with the boiler water. Failure to secure an electrical bond will result in the AquaSmart locking out and displaying, “LOCKOUT

- LOW WATER”.

Installation Instructions on back.

INSTRUCTIONS: Installing the 2-in-1 Sensor

This is very important for successful control operation.

Remove the existing immersion well. Clean the threads in the

1. boiler port tapping. Follow all applicable safety codes, rules and guidelines for removing/installing immersion wells.

Apply pipe sealant to the 2-in-1 sensor threads and install

2. it securely into the port. BECKETT RECOMMENDS ONLY

TO USE TEFLON TAPE OR RECTROSEAL NO. 5 PIPE SEALANT.

Tighten with 1-1/8” open end or box wrench. Pipe

3. wrenches, pliers, and adjustable wrenches will damage/ round-off the hex.

Securely install the AquaSmart control to the sensor. Plug

4. the 2-in-1 Sensor RJ connector (phone jack style) into the receptacle (Item a, Figure 1) on the control.

Route the 36” green wire through the AquaSmart bottom

5. rectangular slot (Item c, Figure 1). Securely install the fork connector of the 36” ground wire and the ground wire from the 2-in-1 sensor under the ground screw at the bottom of the control (Item b, Figure 1).

Thoroughly clean the pipe surface and securely tighten

6. the pipe clamp on the water inlet pipe to the boiler as close to the boiler as possible.

Route the 36” green ground wire to the pipe clamp then

7. cut to proper length, if necessary.

Strip the wire and insert the stripped end into hole on the

8. pipe clamp (item d, Figure 3). Tighten retaining screw against the wire making sure that you have good contact.

Complete control wiring and ﬁ ll the appliance with

9. water to the pressure required, according to appliance manufacturer’s instructions. Make sure all air is purged from the system and there are no leaks. Turn on power to the appliance and observe one call for heat cycle with shut off at set temperature.

Test the Low Water Cut-off (LWCO) Safety Function

WARNING! Avoid touching or shorting the live

terminals during this test.

Turn electric power ON to energize AquaSmart control. Perform the following tests to verify the LWCO function.

For AquaSmart 7600A: Remove the green sensor

•

lead from the ground screw. The sensor should cause the AquaSmart display to indicate, “LOCKOUT – LOW WATER”. If it does not, replace the sensor.

For AquaSmart 7600B:

•

from the ground screw and remove both the B1 and B2 (24 Vac) leads from their terminals. The sensor should cause the AquaSmart display to indicate, “LOCKOUT – LOW WATER”. If it does not, replace the sensor.

Attach wires and tighten terminal screws securely when

• testing is complete.

Remove the green sensor lead

Figure 1 - Sensor lead connection & ground screw connections

Figure 3 - Ground Clamp and Grounding Wire

Figure 2 - Sensor Water Detection Method

AquaSmart

Boiler Control

2-IN-1 SENSOR

Ground Screw

Ground Wire

Pipe Clamp

Water Inlet

The AquaSmart 2-in-1 Sensor uses the “conduction” method to detect whether water is present in the boiler. This is done by using the water in the boiler itself to “conduct” a signal and complete an electrical circuit. It is necessary that the ground wire from the sensor be bonded to the boiler wall (not the jacket - unless the jacket is bonded to the boiler wall). When water is not present, there is no “conduction” and the circuit is incomplete.

For the AquaSmart we recommend that a grounding pipe clamp be mounted to the water inlet pipe, and that a ground wire be bonded from the pipe clamp to the green terminal inside the AquaSmart control. The 2-in-1 sensor green “ground wire” shall also be bonded to the green terminal in the AquaSmart control.

Water Not Present

Incomplete Circuit

Water Present

Complete Circuit

Part No. 61798 R00, Printed in the USA 10/10