Honeywell Electronic Aquastat L7148F User Manual (English)

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PRODUCT DATA

68- 0189- 2

® U.S. Registered Trademark

L7148F

Electronic Aquastat

Controller

GENERAL

The L7148F Electronic Aquastat

Controller is an immersion

type hydronic controller that provides high limit protection

and controls circulator, gas valve and optional vent damper

equipment. The complete L7148F system requires a sensor,

immersion well and transformer, all of which must be ordered

separately. See Table 1 for sensor specifications.

An external 120 Vac to 24 Vac transformer is required to

power the L7148F. For total external transformer VA

requirements, add the 10 VA requirement for the control,

gas valve load requirement (connections B1, B2), zone valve

connection requirement (see zone valve specifications), vent

damper requirement and VA requirement for any other

equipment. Total low voltage load must not exceed 4A.

FEATURES

• Available with quick connect or AMP

plug

connections. T, TV and Z terminals are provided

in a terminal block with screw connections.

• Vent damper plug optional.

• Separate high limit control not required.

• Software defined minimum/maximum limit settings.

• External 120 Vac to 24 Vac transformer, ordered

separately, is field replaceable and upgradable.

• Patented limit rated 209659A,B,C Sensors are

separately replaceable.

• Communications port for future field added advanced

feature modules.

• Flush mounted to sheet metal rather than spud

mounted to sensing well.

• 3/16 in. (5 mm) B1 quick connect and AMP plug

connections meet ANSI miswiring requirements.

• UL353 Limit Controls approval for both U.S. and

Canada.

• Meets UL 1998 Software Safety Standards.

• Diagnostic LED to assist in system troubleshooting.

L7148F WITH QUICK CONNECTS

(SENSOR NOT INCLUDED)

L7148F WITH PLUG CONNECTIONS

(SENSOR NOT INCLUDED)

Contents

General ............................................................................. 1

Features ........................................................................... 1

Specifications ................................................................... 2

Ordering Information ........................................................ 2

Installation ........................................................................ 3

Adjustment ....................................................................... 5

Operation .......................................................................... 5

Checkout .......................................................................... 11

Troubleshooting ................................................................ 11

This is a legacy product document supported by

Resideo. This product is no longer manufactured.

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Honeywell Electronic Aquastat L7148F Specifications

General

Type	Electronic Aquastat
Model	L7148F
Voltage	120 VAC
Temperature Range	100°F to 240°F (38°C to 116°C)
Control Type	On/Off
Switch Type	SPDT
Approvals	UL, CSA
Differential	Adjustable 5°F to 30°F (3°C to 17°C)
Mounting	Surface
Sensor Element	Liquid-filled
Capillary Length	6 ft (1.8 m)
Well Size	1/2 in