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FX4D

Installation Instructions

DIRECT EXPANSION FAN COIL UNITS

FOR PURON® REFRIGERANT

SIZES 019 TO 061

NOTE: Read the entire instruction manual before starting the

installation.

TABLE OF CONTENTS

PAGE

SAFETY CONSIDERATIONS 1........................

INTRODUCTION 1..................................

HEATER PACKAGES 1..............................

INSTALLATION 1...................................

Step 1 -- Check Equipment 2..........................

Step 2 -- Mount Unit 2...............................

Step 3 -- Air Ducts 4................................

Step 4 -- Electrical Connections 4......................

Step 5 -- Refrigerant Tubing Connection and Evacuation 7...

Step 6 -- Refrigerant Flow-- Control Device 7..............

Step 7 -- Condensate Drains 8.........................

Step 8 -- Accessories 9...............................

Step 9 -- Sequence of Operation 9......................

START-- UP PROCEDURES 10.........................

CARE AND MAINTENANCE 10.......................

AIRFLOW PERFORMANCE TABLES 11................

PURONR (R--410A) QUICK REFERENCE GUIDE 12......

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance,

or use can cause explosion, fire, electrical shock, or other

conditions which may cause death, personal injury or property

damage. Consult a qualified installer, service agency, or your

distributor or branch for information or assistance. The qualified

installer or agency must use factory--authorized kits or accessories

when modifying this product. Refer to the individual instructions

packaged with kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective clothing

and work gloves. Have a fire extinguisher available. Read these

instructions thoroughly and follow all warnings or cautions

included in literature and attached to the unit. Consult local

building codes and the current editions of the National Electrical

Code (NEC) NFPA 70.

In Canada, refer to the current editions of the Canadian Electrical

Code CSA C22.1.

Recognize safety information. This is the safety --alert symbol

When you see this symbol on the unit and in instruction manuals,

be alert to the potential for personal injury.

Understand the signal words DANGER, WARNING,and

CAUTION. These words are used with the safety--alert symbol.

DANGER identifies the most serious hazards which will result in

severe personal injury or death. WARNING signifies hazards

which could result in personal injury or death. CAUTION is used

to identify unsafe practices which may result in minor personal

injury or product and property damage. NOTE is used to highlight

suggestions which will result in enhanced installation, reliability, or

operation.

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personal injury

or death.

Before installing or servicing unit, always turn of f all power to

unit. There may be more than 1 disconnect switch. Turn off

accessory heater power if applicable. Lock out and tag switch

with a suitable warning label.

WARNING

CUT HAZARD

Failure to follow this caution may result in personal injury .

Sheet metal parts may have sharp edges or burrs. Use care and

wear appropriate protective clothing and gloves when

handling parts.

CAUTION

INTRODUCTION

Model FX4D is designed for flexibility and can be used for

upflow, horizontal, or downflow (kit required) and manufactured

and mobile home applications. These units are designed to meet

the low air leak requirements currently in effect. Because of this,

the units need special attention in the condensate pan and drain

connection area and when brazing tubing. These units are designed

specifically for Puronr refrigerant and must be used only with

Puronr refrigerant air conditioners and heat pumps as shipped.

These units are available for systems of 18,000 through 60,000

Btuh nominal cooling capacity . Factory--authorized, field--installed

electric heater packages are available in sizes 5 through 30kW. See

Product Data literature for available accessory kits.

HEATER PACKAGES

This unit may or may not be equipped with an electric heater

package. For units not equipped with factory --installed heat, a

factory--approved, field--installed, UL listed heater package is

available from your equipment supplier. See unit rating plate for a

list of factory--approved heaters. Heaters that are not factory

approved could cause damage which would not be covered under

the equipment warranty. If fan coil contains a factory-- installed

heater package, minimum circuit ampacity (MCA) and maximum

fuse/breaker may be different than units with a same size

field--installed accessory heater . The difference is not an error and

is due to calculation diferences per UL guidelines.

Summary of content (12 pages)

PAGE 1
DIRECT EXPANSION FAN COIL UNITS FOR PURON® REFRIGERANT SIZES 019 TO 061 FX4D Installation Instructions NOTE: Read the entire instruction manual before starting the installation. TABLE OF CONTENTS PAGE SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . 1 injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation. WARNING ! INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 2
INSTALLATION ! Step 1 — Check Equipment Unpack unit and move to final location. Remove carton taking care not to damage unit. Inspect equipment for damage prior to installation. File claim with shipping company if shipment is damaged or incomplete. Locate unit rating plate which contains proper installation information. Check rating plate to be sure unit matches job specifications. UNIT OR PROPERTY DAMAGE HAZARD Failure to follow this caution may result in product or property damage.
PAGE 3
A COIL BRACKET FA CT OR Y SHIPPED HORIZONTAL LEFT APPLICATION COI L SUPPORT RAIL B C DRAIN PA N SUPPORT BRACKET COIL BRACKET HORIZONTAL DRAIN PAN 6. Make sure the pan cap in the fitting door is properly seated on the fitting door to retain the low air leak rating of the unit. 7. Add gaskets from kit KFAHD per kit instructions. 8. Align holes with tubing connections and condensate pan connections, and reinstall access panels and fitting panel.
PAGE 4
b. If fan coil is against wall, secure fan coil to wall stud using 1/8--in (3 mm) thick right--angle brackets. Attach brackets to fan coil using no. 10 self--tapping screws and to wall stud using 5/16--in. lag screws. (See Fig. 8.) DRAIN PAN SUPPORT BRACKET 4” (102mm) MAX SECURE FAN COIL TO STRUCTURE UNIT AWAY FROM WALL PIPE STRAP (TYPICAL BOTH SIDES) OR UNIT AGAINST WALL .125" (3mm) MOUNTING BRACKET (TYPICAL BOTH SIDES) A07571 FX4D Fig. 7 -- Drain Pan Support Bracket 6.
PAGE 5
! CAUTION FAN COIL THERMOSTAT RED R PROPERTY DAMAGE HAZARD G Failure to follow this caution may result in product or property damage. W R GRY G WHT W2 WHT BLU If a disconnect switch is to be mounted on unit, select a location where drill or fastener will not contact electrical or refrigerant components. W3 VIO E BRN C AIR COND. C Before proceeding with electrical connections, make certain that supply voltage, frequency, phase, and ampacity are as specified on the unit rating plate.
PAGE 6
FAN COIL THERMOSTAT R RED G GRY G BRN C HEAT PUMP (CONTROL) R R C C WHT W 2 VIO E W2 E THERMOSTAT W2 BLU W 3 ODTS L O Y Y C C C W2 W2 W3 W2 E E ODTS RED R HEAT PUMP (CONTROL) R R G GRY G C BRN C W2 WHT W 2 E Y A09388 Fig. 14 -- Wiring Layout Heat Pump Unit (Cooling and 2--Stage Heat for Manufactured Housing) Transformer Information Transformer is factory--wired for 230v operation.
PAGE 7
When 2 stages are desired, cut W3 at the W2 wire nut, strip and reconnect per the thermostat kit instruction. (See Fig. 12.) When 3 stages are desired, cut the W2 wire nut off and discard. Strip W2, W3, and E and reconnect per thermostat kit instructions. (See Fig. 13.) NOTE: When 3 stages are used or anytime the E terminal is not tied to W2, the emergency heat relay, part of outdoor kit Part No. KHAOT0201SEC must be used. C.
PAGE 8
! CAUTION PRODUCT OPERATION HAZARD Failure to follow this caution may result in improper product operation. FILTER ACCESS PANEL If using a TXV in conjunction with a single--phase reciprocating compressor, a compressor start capacitor and relay are required. Consult outdoor unit pre--sale literature for start assist kit part number. SECONDARY DRAIN WITH APPROPRIATE TRAP REQUIRED (USE FACTORY KIT OR FIELD-SUPPLIED TRAP) PRIMARY TRAP REQUIRED (USE FACTORY KIT OR FIELD-SUPPLIED TRAP OF SUFFICIENT DEPTH.
PAGE 9
Step 9 — Sequence of Operation A. Humidifier Connect humidifier and humidistat to fan coil unit as shown in Fig. 20 and Fig. 21. The cooling lockout relay is optional. A. Continuous Fan Thermostat closes R to G. G energizes fan relay on PCB which completes circuit to indoor blower motor. When G is de--energized, there is a 90 second delay before relay opens. NOTE: Speed taps 1, 2 and 3 have a 90 second blower off delay. Speed taps 4 and 5 have 0 second blower off delay. B.
PAGE 10
AIRFLOW PERFORMANCE TABLES Table 1 – Airflow Performance (CFM) MODEL & SIZE BLOWER SPEED Tap 5 Tap 4 Tap 3 Tap 2 Tap 1 Tap 5 Tap 4 Tap 3 Tap 2 Tap 1 Tap 5 Tap 4 Tap 3 Tap 2 Tap 1 Tap 5 Tap 4 Tap 3 Tap 2 Tap 1 Tap 5 Tap 4 Tap 3 Tap 2 Tap 1 Tap 5 Tap 4 Tap 3 Tap 2 Tap 1 Tap 5 Tap 4 Tap 3 Tap 2 Tap 1 FX4D 019 FX4D FX4D 025 FX4D 031 FX4D 037 FX4D 043 FX4D 049 FX4D 061 0.
PAGE 11
AIRFLOW PERFORMANCE TABLES (cont.) Table 3 – Factory--Installed Filter Static Pressure Drop (in. wc) FX SIZE 019 025 --- 031 037--- 049 061 400 0.020 ------- 600 0.044 0.022 ----- 800 0.075 0.048 ----- CFM 1200 --0.100 0.070 --- 1000 --0.072 0.051 --- 1400 ----0.092 --- 1600 ----0.120 0.086 1800 ----0.152 0.105 2000 ------0.130 HEATER ELEMENTS kW 0 1 2 3 4 0 3, 5 8, 10 9, 15 20 EXTERNAL STATIC PRESSURE CORRECTION +.02 +.01 0 –.02 –.
PAGE 12
PURONR (R--410A) QUICK REFERENCE GUIDE S FX4D S S S S S S S S S S S S S S S S S S S S S S S Puron refrigerant operates at 50--70 percent higher pressures than R--22. Be sure that servicing equipment and replacement components are designed to operate with Puron refrigerant. Puron refrigerant cylinders are rose colored. Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400. Puron refrigerant systems should be charged with liquid refrigerant.