Fujitsu 18RLX Reference manual

Production: All CassettesMODEL :18/24/36/42RLX Systems

Duct Fan ControlSOLUTION

Fresh Air Intake w/ Compressor Operation OnlyPROBLEM

SERVICE BULLETIN

Number: 0006

Date: 9/22/09 Rev2

Type: Field

FUJITSU GENERAL AMERICA, INC

353 Route West. Fairfield, NJ 07004

Ph: 973-575-0381 Fx: 973-836-0449

Em: [email protected]

1. Outline

The circuit shown below provides a cost effective solution for wiring a current switch

that monitors the compressor operation ON/OFF status and energizes the coil of a

relay which in turn close the contacts and provide line voltage to the duct fan. The

duct fan is required to introduce fresh (outside) air for ventilation.

2. Application

A third party current sensor switch with a built-in relay was

used in this application. The current sensor may be

installed around one of the compressor line voltage wires (Red,

Black or White).

3. Wiring diagram

Duct fan booster

Compressor

N.O.

24V DC

115V AC

IPM

Current Sensor

Built in Relay

N.O.

4. Components utilized

Current sensor with built-in relay specifications:

Split Core Fixed Threshold Current Status Sensor with Command Relay and

Switching Power Supply.

FGAI Fresh Air Kit Part # KHRS940-25

5. Recommended Fan size.

Duct and Fan are field supply. A fan capable of generating 15 CFM at a

static pressure of approximately .26 inches W.C.

Wiring

•Recommended wire size- 14 AWG.

10A Fuse

(Field Supply)

• Install the current sensor around one of the compressor line voltage

wires.

• Tuck sensor into the clearance behind the compressor wire molex

plug.

• Secure the current sensor with a zip tie.

Current Sensor Installation

• 4 zip ties are needed for correct installation.

• Secure the current sensor wires with all four zip ties according to the

arrows. Do not tie around any of the copper lines.

•Cut the ends of the zip ties.

Secure Current Sensor

15 CFM

58.8 Pa

.24 in W.C.

CASSETTE

2.75” x 4”

Field Supplied

Transition

Fan

4” Duct

Outside (Fresh)

Air Intake

Fan Static Pressure Requirements:

Static pressure required at Cassette = .24 in W.C.

25 ft. 4” duct + intake=45ft. TEL x .04/100 = .018 in W.C.

TOTAL =.258 in W.C.

Fan Selection:

Select fan to deliver 15 CFM @ approximately .26 in W.C.

Static pressure requirements will vary with duct length and

inlet conditions.

NOTE: Filter for outside air required. Add filter static pressure loss to static

pressure requirements above.

CEILING CASSETTE

OUTSIDE (FRESH) AIR INTAKE

This manual suits for next models

Table of contents

Other Fujitsu Air Conditioner manuals

Fujitsu

Fujitsu ASHA18GBCH User manual

Fujitsu

Fujitsu AR*G30LMLE series Instruction manual

Fujitsu

Fujitsu ART36AL(3)H User manual

Fujitsu

Fujitsu AirStage AJ 040LBLDH Series User manual

Fujitsu

Fujitsu 24LMAS1 User manual

Fujitsu

Fujitsu Inverter ARTG09LL User manual

Fujitsu

Fujitsu AGYF09LAC User manual

Fujitsu

Fujitsu AUU9RLF Service manual

Fujitsu

Fujitsu AUU7RLF Service manual

Fujitsu

Fujitsu asyg18lfca User manual

Fujitsu

Fujitsu Halcyon ASU18T User manual

Fujitsu

Fujitsu ASY17FSBQ User manual

Fujitsu

Fujitsu AS*A09LKC Operating instructions

Fujitsu

Fujitsu Airstage AS A014GCEH User manual

Fujitsu

Fujitsu ARTG24LM User manual

Fujitsu

Fujitsu AUXB07GALH User manual

Fujitsu

Fujitsu agyg09lvca User manual

Fujitsu

Fujitsu arya24latu User manual

Fujitsu

Fujitsu GENERAL ASHG18KMTA Service manual

Fujitsu

Fujitsu ASYG07KETE Service manual

Fujitsu

Fujitsu 9319357003-02 User manual

Fujitsu

Fujitsu AIRSTAGE AUXB004GLEH User manual

Fujitsu

Fujitsu ASY24QM User manual

Fujitsu

Fujitsu ASU7RLF1 Reference manual

Popular Air Conditioner manuals by other brands

Spheros

Spheros CC 355 instructions

Bosch

Bosch Climate 5000 SCI 24 CAS/ OU- OUE owner's manual

Panasonic

Panasonic CS-E12HKEW operating instructions

nedis

nedis ACMB1WT7 quick start guide

Samsung

Samsung AR KV Series User & installation manual

Daikin

Daikin FCFV50A Operation manual

Toshiba

Toshiba RAS-M10SMUV-E installation manual

Daikin

Daikin FXLQ20MAVE Operation manual

Hitachi

Hitachi RAS-E24CAK instruction manual

CIAT

CIAT Magister 2 Series Installation, Operation, Commissioning, Maintenance

Bestron

Bestron AAC6000 instruction manual

Hisense

Hisense 7K Use and Installation Instructions

Frigidaire

Frigidaire FFRE0533S1E0 Use & care guide

Samsung

Samsung AS09HM3N user manual

Frigidaire

Frigidaire CRA073PU11 use & care

Soleus Air

Soleus Air GB-PAC-08E4 operating instructions

McQuay

McQuay MCK020A Technical manual

Webasto

Webasto Frigo Top 25 DS Instructions for use