Install Instructions

ManualsBrandsTaco ManualsHeating SuppliesElectronic, (24V) Low Water Cut-Off (Water), 3/4" NPT

2-3 Wraps Teﬂ on®

Tape

Item Description

Status LED Bi-color LED status indicator. See "LED States" table for details.

Service LED Amber LED indicator that service is needed on LTR or system.

Test Button Push button switch for testing safety shutdown of boiler controls.

LTR Connector Power and relay contact connector.

Status LED Service LED Contacts Meaning

Green Off Closed Normal

Green Amber Closed Safe water level, weak probe signal - Service soon.

Red Off Open Low water condition, (LW)

Red Amber Open Probe signal too weak, LW condition - Service now.

Blinking Red Off Open Control failure. Lockout in LW condition.

Off Off Open No power to LWCO.

LED States:

Installation:

1. Install the probe above the minimum safe water level, as determined from the boiler manufacturer's literature. (See Fig. 1)

NOTE: This may be in a tapping on the boiler or in the boiler supply or return piping.

2. Install the probe to extend into the boiler cavity or piping to make contact with the water.

3. Install the probe so that the exposed portion of the stainless steel is a minimum of 1/4" from any grounding surface inside the

boiler (to prevent the probe from shorting). (See Fig. 2)

4. Hand tighten the LTR into the process connection. Do not cross-thread. Do not use a wrench or other tools to tighten the

control.

• Do not mount device with probe angled upward or deposits can

accumulate on the probe.

• Mount only with probe facing horizontally or vertically downward

and maintain 1/4" minimum clearance from electrode and pipe wall.

• Failure to install probe as directed can cause improper operation

and damage to equipment and property.

• Apply Teﬂ on® tape only to the threads of the LTR. Do not use pipe

dope or other thread sealants. Damage to the control may occur

and result in improper operation.

• Hand tighten the LTR into the process connection being careful to not

cross-thread. Do not use a wrench or other tools to tighten the control.

Damage to the control may occur and result in improper operation.

Fig. 2

LTR

Connector

Status LED

(Bi-color)

Service LED

(Amber)

Test

Button

Probe

Process

Connection

Minimum Safe

Water Level

LTR Features:

Fig. 1