Carrier FX4BNF048000AAAA, FX4BNF018000AAAA, FX4BNB060000AAAA, FX4BNF042000, FX4BNF036000 Installation Guide

Installation Instructions

Direct Expansion Fan Coil Units
For Puron® Refrigerant

J

FX4B

J

Ag8023

Fig. 1--Model FX4B

NOTE: Read the entire thstraction malmM before star_thg the thstallation.

_is symhol ,_ indicates a change sirice the last issue.

SAFETY CONSIDERATIONS

Improper installer thn, adj ustmeitt, _dtcl ation, service, maintenance, or use can cause explosion, fire, electrical shock, or othel conditions which may
cause personal injury or property damage¸ Consul_ a qLlalified installer, service agency, or yoLlr distributor or branch for in fonnatthn or assis_nce
_e qtl_lified installer or agency must Llse factory-atlthorized ki_ or _ccessories witch modifying this pl_dLIc t Refer 1o the individual instructions

packaged with kits or accessories witch instaIlthg

Follow all safety codes¸ Wear safety glasses and work gloves¸ Use quenching cloth for brazing opel-at ions Have fire extinguisher available¸ Read
these instructions thoroughly aod follow all warnings or cautions attached 1o the unit. Consult local building codes and National Electrical Code

(NEC) for special requirements

Recognize safety information This is the safoty-aler_ synthol _ When you see this symbol on the unit _od in instructions manuals, be alert 1o
the polential for personal iniury

Form: IM-FX4B-02 Cancels: IM-FX4B-01 Printed in U.SA 6-03 Catalog No. 63FX481

POWER ENTRY_ SUPPLIED

OPTIONS_& SUPPLYDUCT

0t8,030-048 21dN.

060 24qN FRONT SERVICE

UPFLOW/DOWNFLOW -- -

CLEARANCE

SECONDARYO ,N

UPFLOW/DOWNFLOW J

PRIMARYDRAIN

SECONDARY DRAIN

ENTRY
OPTIONS

UNff A

018 12IN.
030 171N

036 191N

FIELD MODIFIED

A SIDE RETURN

2 _/2_ SLOPE COIL

LOCATION FOR
UNITS ONLY

PRIMARY DRAIN

FIELD SUPPLIED
RETURN PLENUM

A00415

Fig. 2--Slope Coil Unit in Upflow Application

Understand the signal words DANGER, WARNING, CAUTION, and NOTE l'imse words me used with the safety-alm_ symbol DANGER
identifies the most serious hazards which will result in severe personal injury or dealh. WARNING sight fies hazards which could result in personal

m_ury or death. CAUTION is used m identify unsafe practices which would result in miner personal injury ol prcduct and properly damage NOTE
is used to highlight suggestions which will result in enhanced instafafon, reliabitgy, or opemfon

WARNING: Before installing or servicing unit, always turn off all power to unit. There may be more than t disconnect

switch. Turn off accessory heater power if applicable. Electrical shock can cause personal injury or death.

INTRODUCTION

Model FX4B Fan Coil Units are designed for flexibility and can be used for upfiow, horizontal, or down flow (kit required and manuPactured and
mobile home) applications These units are designed to meet the low air leak requirements currently in e fi'eet Because of this, the units need special

attention in the condensate pan and drain connection area and when brazing tubing These tlnits ale designed specifically for Puron and must be

used only with Pmon air conditioners and heat pinups as shipped "l_ese units are available for applications in systems of 18,000 through 60,000
13tuh nominal cooling capacities Pactory-autholized, feId-instMled electric beater packages are available in 5 through 30 kw See prcduct data

for available accesso W kits

HEATER PACKAGES

I_ds unit may or may not be equipped with an electric heater package For ungs not equipped with l_ack_ry installed heah a factory approved, field

instadled UL listed heater package is available Prom yam equipment supplier See unit rating plate for a list of l_actory approved beaters. Healers

that are not Paetory approved could cause damage which would not be covered under the equipment wm_an_y/f l_n coil contains a factory installed

hemer package, minimum circuit ampacfly (MCA) and maximum fuse/breaker may be different than units with a same size field installed accessory
healer fhe difference is not an er;or and is due to calculation difl'_rence per UL guidelines

INSTALLATION

PROCEDURE f--CHECK EQUIPMENT

Unpack t_ng and move to final location. Remove car[on laking care not to damage t_nit
Inspect equipment for damage prior to instaIlaflen File claim with shipping company if shipment is damaged or incomplete Locate unit raflng

plate which contains proper installation information Check rating plate to be sure unit matches job specifications

PROCEDURE 2--MOUNT UNIT

Unit can stand or lie on floor, or hang fiom ceiling or wall. Allow space for wiring, piping, and servicing mdt
IMPORTANT: When unit is installed over a finished ceiling and/or living mea, building cedes may require a field-supplied secondary condensate

pan _o be inslalled under the entire unik Some lecaliges may allow as an alternafve, file running of a separate, secondary condensate line Consult

local cedes fol additional restrictions or plecautions

2

A. Upflow Installation

If return air is to be dueled through a floor, sc'l unit on flOOl over opening and use 1/8- to I/d-in thick fireproof resilient gasket between duct, unit,

and floor

Side return is a field option on slope coil models ("ut opening per dimensions (See Pig. 2) A fleld-seppbed botlom closure is required

B. Downflow Installation

I11this applicaflon, field conversion of tile evaporator is required using accessoly do_snflow kit along with ari accessory base kit Use fireproof

resilient gasket, 1/8- to l/4-in thick, between duct, unit, and floor.

NOTE: IZ_ convert ulgts for downflow epplicaflons, refer to Installation lnslruc_ions supplied with kit fol proper installation. FOl slope _ln coils,
use kit Part No KFADC0201SLP For A Pan coils use kit Par_ No KFADC0401 ACE Use fireproof resilient gasket, 1/8- m l/4-in thick, between

duct, unit, and floor

NOTE: Gasket kit number KFAHD01OISLP is also required for all downflow appbeations to maintain low air leak/low sweat performance.

CAUTION: The conversion of the fan coil to downflow requires special procedures for the condensate drains on both

A-coil and Slope units. The vertical drains have an overflow hole between the primary and secondary drain holes. This hole

is plugged for all applications except downflow, but must be used for downflow. During the conversion process, remove the
plastic cap covering the vertical drains only and discard. Remove the plug from the overflow hote and discard. At completion

of the downfiow installation, caulk around the vertical pan fitting to door joint to retain the low air leak performance of the

unit. Failure to follow this CAUTION coutd result in minor personal injury or product and property damage.

C. Horizontal Installation

Units must not be installed with access panels Pacing up or down All units are factory built for horizontad left installaflon. (See Fig 3 and 8) When

suspending unit from ceiling, dimples in c_sing indicate suitable locagon of screws for mounting metM support straps. (gee Fig 3)

CAUTION: For optimum condensate drainage performance in horizontal installations, unit should be leveled along its

length and width. Failure to follow this CAUTION could result in minor personal injury or product and property damage.

NOTE: Modular units can be disassemhled and componems moved separately to installation area fol reassemhly fhis process accommodates

small scuttle holes and limiting entrances to installation sites. (gee Pig 4)

HORIZONTAL LEFT

SECONDARY PRIMARY

• 0_8,030-048 2_- IN
06024= IN

FRONT SERVICE
CLEARANCE

FULL FACE

_F UNIT i

A00416

ENTRY

OPTIONS

POWER
ENTRY OPTIONS

FIELD _ _RA_N
SUPPLIED

HANGING
STRAp

PRIMARY
DRA_N

SECONDARY
DRA_N

Fig. 3---Slope Coil Unit in Horizontal Left Application

HORIZONTAL RIGHT CONVERSION OF UNITS WITH SLOPE COILS
NOTE: Gasket kit number KFAHDgI01SLP is required for horizontal slope coil conversion to maintain low air leak/low sweat performance

t. Remove blower and coil access p;meI and fi_flng panel (See Pig. 5)

2. Remove coil mounting screw securing coil assembly 1o right side casing flange.
3

BLOWERBOX

-2SCREWS

BRACKET

Fig. 4--Removal of Brackets on Modular Units

I

I

CORNER

COIL MOUNTING

- SCREW

_2SCREWS

COILBOX

r\

2SCREWS

Ag5293

-SECONDARYDRAEN

Fig. 5--Conversion for Horizontal Right Applications Using a Slope Coil

3. Remove coil assembly

4. L;ly _llt coil unit o11 its right side and reinstall coit assembly with condensate pan down (See Fig 5.)

5. Attach COil to casing flange using coil mounting screw previously removed

6. Make sine tile 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 gaskeI_ from kit KFAHD per kit instructions

8. Align holes with tubing connections and condensate pan connections, and reinstall access panels and filling panel

Make sure liquid and suction tube grommets are in place Io prevent air leaks and cabinet sweating. Install after br_aTing

HORIZONTAL RIGHT CONVERSION OF UNITS WITH A-COIL

1+ Remove blower and coil access panels. (See Fig 6)

2. Remove metal clip securing fitting panel to condensale pan Remove fitting panel

3. Remove 2 snap-in clips securing A-coil in unit

A03001

CONNECTIONS

SUPPORT

RAiL

HORIZONTAL

RIGHT

APPLICATION

BRACKET

DRAINpAN

HORIZONTAL RIGHT

SECONDARy DRAIN

-AIRSEAL

HORIZONTAL RIGHT

Fig. 6--Conversion for Horizontal Right Applications Using A-Coil

4. Slide coil and pan assembly out of mlg.

5. Remove horizomal drain pan support bracket from coil suppor_ rail on leR side of unit and reinslall on coil suppor_ rail on right side of unit.

6. Convert air-seal assembly for horizontal right.

a Remove air-seal assembly from coil by removing 4 screws (See Fig 6)
b Remove air splgler (B) Prom coil seal assembly by removing 3 screws {See Fig. 6 factor3, sldpped inseL}
c Remove filler plate (A) and install air splitter (B) in place of filter plale.
d Inslall fihm plate {A) as shown in I_orizontal right applicagon
e Remove condensate troughs {C) and install on opposite tube sheels
f Install hose onto plastic spout

7. Install hodzomal pan on right side of coil assembly.

8. Slide coil assembly into casing. Be sure coil bracket on e_h comer of vertical pan engages coil suppor_ raiix

9. Reinstall 2 snap-in clips to correcqy position and secure coil assembly in unit. Be sure clip with lmge ofl2set s is used on right side oPmlg

to secure horizontal pan

lO. Remove lwo oval fil_ing caps from the left side of the coil door and filfing panel

11. Remove insulation knockouts on right side of coil access panel

12. Remove 2 oval coil access panel plugs and reinstall into I_oles on leR side of coil access panel and filling panel

13. Install condensate pan fitting caps (from Sic't) 10) in lhe light side of gte coil door making sine that the cap snaps and seats cleanly on the
back side of the coil door Make sure no insulation interferes with seating of the cap.

14. Reinstall access fil_ing panels, aligning holes wgh tubing connections and condensate pan collnectiolls _e sure Io reinstall metal clip
between fitting panel and vertical condensate pan

Make sure liquid and suction tube grommets are in place Io prevent air leaks and cabinet sweating.

D, Manufactured and Mobile Home Housing Applications

1. Pan coil unit must be secured to the s_ructme using field-supplied hardware

2. Allow a minimum of 24" clearance from access panels

3. Recommended mefllod of securing for typical appticagons
a If Fan coil is away from walt, attach pipe s_rap to top of Pan coil using No 10 self tapping screws Angle strap down and away from back

of l_on coil, remove all slack, and l_osten to wail stud of s_ructure using 5/I6-in. lag screws Typical both sides of l_on coil

b If fan coil is against wail, secme Pan coil to wall stud using l/8-in, ddck right-angle b_ackets Attach brackels 1o fan coil using No 10

self tapping screws and m wall stud using 5/16-in lag screws {See Fig. 7)

PROCEDURE 3--AIR DUCTS

Connect supply-air duct over the (mtside of 3/d-in flanges provided on supply-air opening Secrete duct 1o flange, using proper Pasteners fol type
of duct used, and seal duct-to-unit joint If return-air flanges ale required, inslall Paclory-a_thorized accessory kit

5

A00071