Carrier Pf4mna User manual

Installation Instructions

NOTE: Read the entire instruction manual before starting the installation.

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.

INTRODUCTION

Model PF4MNA Fan Coils are 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 R-410A

refrigerant and must be used only with R-410A 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

Factory-approved, field-installed, UL listed heater packages are

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.

INSTALLATION

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.

MOUNT UNIT

Unit can stand or lie on floor, or hang from ceiling or wall. Allow space

for wiring, piping, and servicing unit.

IMPORTANT: When unit is installed over a finished ceiling and/or

living area, building codes may require a field-supplied secondary

condensate pan to be installed under the entire unit. Some localities may

allow as an alternative, the running of a separate, secondary condensate

line. Consult local codes for additional restrictions or precautions.

NOTE: Nuisance sweating may occur if the unit is installed in a high

humidity environment with low airflow.

UPFLOW INSTALLATION

If return air is to be ducted through a floor, set unit on floor over opening

and use 1/8 to 1/4-in (3 to 6 mm) thick fireproof resilient gasket between

duct, unit, and floor.

Side return is a field option on slope coil models. Cut opening per

dimensions. (Fig. 1) A field-supplied bottom closure is required.

DOWNFLOW INSTALLATION

In this application, field conversion of the evaporator is required using

accessory downflow kit along with an accessory base kit. Use fireproof

resilient gasket, 1/8 to 1/4-in (3 to 6 mm) thick, between duct, unit, and

floor.

PF4MNA

DIRECT EXPANSION FAN COIL

SIZES 018 TO 061

WARNING

ELECTRICAL OPERATION HAZARD

Failure to maintain proper clearances could result in personal injury or

death.

Before installing or servicing unit, always turn off all power to unit.

There may be more than 1 disconnect switch. Turn off accessory heater

power if applicable. CAUTION

PRODUCT OR PROPERTY DAMAGE HAZARD

Failure to follow this warning caution may result in product or property

damage.

The conversion of the fan coil to downflow requires special procedures

for the condensate drains on both A-coil and Slope-coil units. The

vertical drains have an overflow hole between the primary and

secondary drain holes. This hole is plugged for all applications except

downflow, and must be used for downflow. During conversion process,

remove plastic cap covering vertical drains only and discard. Remove

plug from overflow hole and discard. At completion of downflow

installation, caulk around vertical pan fitting to door joint to retain low

air leak performance of the unit.

PF4MNA: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

A09392

Fig. 1 – Slope Coil Unit in Upflow Application

A07566

Fig. 2 – Slope Coil in Horizontal Left Application (Factory Configuration)

A00072A

Fig. 3 – A-Coil in Horizontal Left Application (Factory Configuration)

A COIL

UNITS

POWER ENTRY

OPTIONS

LOW VOLT

ENTRY

OPTIONS

FIELD MODIFIED

SIDE RETURN

LOCATION FOR

SLOPE COIL

UNITS ONLY

FIELD SUPPLIED

RETURN PLENUM

UPFLOW/DOWNFLOW

SECONDARY DRAIN

UPFLOW/DOWNFLOW

PRIMARY DRAIN

UNIT

018

019 - 031

12" (305 mm)

17" (432 mm)

1.5" (38 mm)

2.5"

(64 mm)

19" (483 mm)

FIELD SUPPLIED

SUPPLY DUCT

UPFLOW/DOWNFLOW

SECONDARY DRAIN

UPFLOW/DOWNFLOW

PRIMARY DRAIN

036/037 19" (483 mm)

018 - 049 21" (533 mm) FRONT SERVICE

060 - 061 24" (610mm) CLEARANCE

UNIT

FIELD

SUPPLIED

HANGING

STRAPS

LOW VOLT

ENTRY

OPTIONS

POWER

ENTRY OPTIONS

SECONDARY

DRAIN

018-048 21" (533 mm)

060-060 24" (610 mm)

FRONT SERVICE

CLEARANCE

(FULL FACE

OF UNIT)

SECONDARY

DRAIN

A-COIL

HORIZONTAL LEFT

PRIMARY

DRAIN

PRIMARY

DRAIN

1.75" (44 mm)

FILTER ACCESS

CLEARANCE

FACTORY SHIPPED

HORIZONTAL LEFT

APPLICATION

AIR SEAL

ASSEMBLY

HORIZONTAL

DRAIN PAN

REFRIGERANT

CONNECTIONS

SECONDARY DRAIN

HORIZONTAL LEFT

PRIMARY DRAIN

HORIZONTAL LEFT

COIL

SUPPORT

RAIL

COIL

BRACKET

DRAIN PAN

SUPPORT

BRACKET

COIL

BRACKET

PF4MNA: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

A03001

Fig. 4 – Conversion for Horizontal Right Applications - Slope Coil

A00071A

Fig. 5 – Conversion for Horizontal Right Applications - A-Coil

NOTE: To convert units for downflow applications, refer to Installation

Instructions supplied with kit for proper installation. For slope fan coils,

use kit Part No. KFADC0201SLP. For A-coils, use kit Part No.

KFADC0401ACL. Use fireproof resilient gasket, 1/8 to 1/4-in (3 to 6

mm) thick, between duct, unit, and floor.

NOTE: Gasket kit number KFAHD0101SLP is also required for all

downflow applications to maintain low air leak/low sweat performance.

HORIZONTAL INSTALLATION

Units must not be installed with access panels facing up or down. All

other units are factory built for horizontal left installation. (Fig. 2 and

Fig. 3.) When suspending unit from ceiling, dimples in casing indicate

suitable location of screws for mounting metal support straps. (Fig. 2)

For horizontal applications having high return static and humid return

air, the Water Management Kit, KFAHC0125AAA, may need to be used

to assist in water management.

NOTE: Modular units (sizes 060 and 061) can be disassembled and

components moved separately to installation area for reassembly. This

process accommodates small scuttle holes and limiting entrances to

installation sites. (Fig. 6)

Horizontal Right Conversion of Units with Slope Coils

NOTE: Gasket kit number KFAHD0101SLP is required for horizontal

slope coil conversion to maintain low air leak/low sweat performance.

1. Remove blower and coil access panels and fitting panel. (Fig. 5)

2. Remove coil mounting screw securing coil assembly to right side

casing flange.

COIL MOUNTING

SCREW BLOWER

ASSEMBLY

REFRIGERANT

CONNECTIONS

SECONDARY DRAIN

PRIMARY DRAIN

DRAINPAN

SLOPE COIL

SKI

COIL

SUPPORT

RAIL

COIL

SUPPORT

RAIL

COIL

BRACKET

DRAIN PAN

SUPPORT

BRACKET

COIL

SUPPORT

RAIL

COIL

BRACKET

HORIZONTAL

DRAIN PAN

PRIMARY DRAIN

HORIZONTAL RIGHT

SECONDARY DRAIN

HORIZONTAL RIGHT

REFRIGERANT

CONNECTIONS

AIR SEAL

ASSEMBLY

HORIZONTAL

RIGHT

APPLICATION

CAUTION

PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in product or property damage.

For optimum condensate drainage performance in horizontal

installations, unit should be leveled along its length and width.

PF4MNA: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

3. Remove coil assembly.

4. Lay fan coil on its right side and reinstall coil assembly with

condensate pan down (Fig. 4)

5. Attach coil to casing flange using previously removed coil

mounting screw.

6. Make sure pan cap in fitting door is properly seated on fitting door

to retain low air leak rating of the unit.

7. Add gaskets from kit - KFAHD.

8. Align holes with tubing connections and condensate pan

connections. Reinstall access panels and fitting panel.

9. Make sure liquid and suction tube grommets are in place to prevent

air leaks and cabinet sweating. Install grommets after brazing.

Horizontal Right Conversion of Units with A-Coils

1. Remove blower and coil access panels. (Fig. 5)

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

Remove fitting panel.

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

4. Slide coil and pan assembly out of unit.

5. Remove horizontal drain pan support bracket from coil support rail

on left side of unit and reinstall on coil support rail on right side of

unit. (Fig. 7)

6. Convert air seal assembly for horizontal right.

a. Remove air seal assembly from coil by removing 4 screws.

(Fig. 5)

b. Remove air splitter (B) from coil seal assembly by removing 3

screws. (Fig. 6 inset)

c. Remove filler plate (A) and install air splitter (B) in place of filler

plate.

d. Install filler plate (A) as shown in horizontal right application.

e. Remove condensate troughs (C) and install on opposite tube

sheets.

f. Install hose onto plastic spout.

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

8. Slide coil assembly into casing. Be sure coil bracket on each corner

of vertical pan engages coil support rails.

9. Reinstall 2 snap-in clips to correctly position and secure coil

assembly in unit. Be sure clip with large offsets is used on right side

of unit to secure horizontal pan.

10. Remove two oval fitting caps from left side of the coil, access

panel, and fitting panel.

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

12. Remove 2 oval coil access panel plugs and reinstall into holes on

left side of coil access panel and fitting panel.

13. Install condensate pan fitting caps (from Step 10) in right side of

coil door making sure that cap snaps and seats cleanly on back side

of the coil door. Make sure no insulation interferes with seating of

cap.

14. Reinstall access and fitting panels, aligning holes with tubing

connections and condensate pan connections. Be sure to reinstall

metal clip between fitting panel and vertical condensate pan.

15. Make sure liquid and suction tube grommets are in place to prevent

air leaks and cabinet sweating.

Manufactured and Mobile Home Housing Applications

1. Fan coil unit must be secured to the structure using field-supplied

hardware.

2. Allow a minimum of 24-in (610 mm) clearance from access panels.

3. Recommended method of securing for typical applications:

A95293

Fig. 6 – Removal of Brackets on Modular Unit

A07571

Fig. 7 – Drain Pan Support Bracket

A07567

Fig. 8 – Mobile Home or Manufactured Housing Applications

2 SCREWS

REAR CORNER

BRACKET

BLOWER BOX

COIL BOX

2 SCREWS

DRAIN PAN

SUPPORT BRACKET

DOWN FLOW

BASE KIT (KFACB)

UNIT AGAINST WALL

.125" (3mm)

MOUNTING BRACKET

(TYPICAL BOTH SIDES)

SECURE FAN COIL TO STRUCTURE

UNIT AWAY FROM WALL

PIPE STRAP

(TYPICAL BOTH SIDES)

SECURE UNIT TO FLOOR

ANGLE BRACKET OR PIPE STRAP

4” (102mm) MAX

PF4MNA: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

a. If fan coil is away from wall, attach pipe strap to top of fan coil

using no. 10 self-tapping screws. Angle strap down and away

from back of fan coil, remove all slack, and fasten to wall stud of

structure using 5/16-in. lag screws. Typical both sides of fan coil.

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. (Fig. 8)

AIR DUCTS

Connect supply-air duct over the outside of 3/4-in (19 mm) flanges

provided on supply-air opening. Secure duct to flange, using proper

fasteners for type of duct used, and seal duct-to-unit joint. If return-air

flanges are required, install factory-authorized accessory kit.

Use flexible connectors between ductwork and unit to prevent

transmission of vibration. When electric heater is installed, use

heat-resistant material for flexible connector between ductwork and unit

at discharge connection. Ductwork passing through unconditioned space

must be insulated and covered with vapor barrier.

Units equipped with 20-30kW electric heaters require a 1-in (25 mm)

clearance to combustible materials for the first 36-in (914 mm) of supply

duct.

DUCT WORK ACOUSTICAL TREATMENT

Metal duct systems that do not have a 90 degree elbow and 10 feet of

main duct before first branch takeoff may require internal acoustical

insulation lining. As an alternative, fibrous duct work may be used if

constructed and installed in accordance with the latest edition of

SMACNA construction standard on fibrous glass ducts. Both acoustical

lining and fibrous duct work shall comply with National Fire Protection

Association as tested by UL Standard 181 for Class 1 air ducts.

ELECTRICAL CONNECTIONS

Model sizes 018, 024, 030, 036, 042, 048 and 060 from the factory

utilize a printed-circuit board (PCB) which has a low voltage circuit

protective fuse (5 amp), fan motor speed tap selection terminal (SPT),

and time delay relay (TDR) jumper. To disable the TDR feature, sever

the jumper wire JW1. (Fig. 9)

A03010

Fig. 9 – Fan Coil Printed Circuit Board for

Sizes 018, 024, 030, 036, 042, 048, 060

Model sizes 019, 025, 031, 037, 043, 049 and 061 from the factory

protect the low voltage circuit with a 5 amp automotive type fuse inline

on the wire harness. Speed selections are made at the fan motor by

selecting taps 1, 2 or 3 with the blue wire (see (MINIMUM CFM AND

MOTOR SPEED SELECTION on p7)). The motor is pre-programmed

with the time delay circuit on some of the speed taps (see section E for

clarification).

When a factory-approved accessory control package has been installed,

check all factory wiring per unit wiring diagram and inspect factory

wiring connections to be sure none were loosened in transit or

installation. If a different control package is required, see unit rating

plate.

Before proceeding with electrical connections, make certain that supply

voltage, frequency, phase, and ampacity are as specified on the unit

rating plate. See unit wiring label for proper field high- and low-voltage

wiring. Make all electrical connections in accordance with the NEC and

any local codes or ordinances that may apply. Use copper wire only.

The unit must have a separate branch electric circuit with a

field-supplied disconnect switch located within sight from, and readily

accessible from, the unit.

On units with a factory installed disconnect with pull-out removed,

service and maintenance can be safely performed on only the load side

of the control package.

LINE VOLTAGE CONNECTIONS

If unit contains an accessory electric heater, remove and discard power

plug from fan coil and connect male plug from heater to female plug

from unit wiring harness. (See Electric Heater Installation Instructions.)

For units without electric heat:

1. Connect 208/230V power leads from field disconnect to yellow and

black stripped leads.

2. Connect ground wire to unit ground lug.

NOTE: Units installed without electric heat should have a field-supplied

sheet metal block-off plate covering the heater opening. This will reduce

air leakage and formation of exterior condensation.

24V CONTROL SYSTEM

Connection To Unit

Wire low voltage in accordance with wiring label on the blower. (See

Fig. 10 through Fig. 15) Use no. 18 AWG color-coded, insulated (35°C

minimum) wire to make the low-voltage connections between the

thermostat, the unit, and the outdoor equipment. If the thermostat is

located more than 100-ft (30 m) from the unit (as measured along the

low-voltage wire), use no. 16 AWG color-coded, insulated (35°C

minimum) wire. All wiring must be NEC Class 1 and must be separated

from incoming power leads.

Refer to outdoor unit wiring instructions for any additional wiring

procedure recommendations.

CPC-E

94V-0

LR40061

HSCI

5 AMP

SPT

R10

R11

C1C2

JW1

FAN

RELAY

WARNING

ELECTRICAL SHOCK OR UNIT DAMAGE HAZARD

Failure to follow this warning could result in personal injury, death,

and/or unit damage.

If a disconnect switch is to be mounted on unit, select a location where

drill and fasteners will not contact electrical or refrigeration

components.

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Field wires on the line side of the disconnect found in the fan coil unit

remain live, even when the pull-out is removed. Service and

maintenance to incoming wiring cannot be performed until the main

disconnect switch (remote to the unit) is turned off.

PF4MNA: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

HEATER STAGING

The controls are factory circuited for single-stage operation. For 2-stage

operation, use outdoor thermostat kit Part No. KHAOT0301FST, and for

3-stage use both kits Part No. KHAOT0201SEC and KHAOT0301FST.

When 2 stages are desired, cut W3 at the W2 wire nut, strip and

reconnect per the thermostat kit instruction. (Fig. 13)

When 3 stages are desired, cut the W2 wire nut off and discard. Strip

W2, W3, and E and reconnect per thermostat kit instructions (Fig. 14).

TRANSFORMER INFORMATION

Transformer is factory wired for 230V operation. For 208V applications,

disconnect the black wire from the 230V terminal on transformer and

connect it to the 208V terminal (Fig. 16).

NOTE: When 3 stages are used or any time the E terminal is not tied to

W2, the emergency heat relay, part of outdoor kit Part No.

KHAOT0201SEC, must be used.

MANUFACTURED HOUSING

In manufactured housing applications, the Code of Federal Regulations,

Title 24, Chapter XX, Part 3280.714 requires that supplemental electric

heat be locked out at outdoor temperatures above 40°F (4°C), except for

a heat pump defrost cycle. Refer to Fig. 15 for typical low voltage wiring

with outdoor thermostat.

A94058

Fig. 10 – Wiring Layout Air Conditioning Unit

(Cooling Only)

A94059

Fig. 11 – Wiring Layout Air Conditioning Unit

(Cooling and 1-Stage Heat)

A94060

Fig. 12 – Wiring Layout Heat Pump Unit

(Cooling and 2-Stage Heat with No Outdoor Thermostat)

A94061

Fig. 13 – Wiring Layout Heat Pump Unit

(Cooling and 2-Stage Heat with 1 Outdoor Thermostat)

A94062

Fig. 14 – Wiring Layout Heat Pump Unit

(Cooling and 2-Stage Heat with 2 Outdoor Thermostats)

A03088

Fig. 15 – Wiring Layout Heat Pump Unit

(Cooling and 2-Stage Heat for Manufactured Housing)

CAUTION

PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in product or property damage.

If W2, W3, and E on any 3 stage heater (18, 20, 24, or 30kW), are

individually connected as with outdoor thermostats or any other

situation, emergency heat relay must be used. This relay is in kit Part

No. KHAOT0201SEC and is normally used with kit Part No.

KHAOT0301FST for 2 outdoor thermostat system.

THERMOSTAT

RED

GRY

WHT

BLU

VIO

BRN

WHT

FAN COIL

(CONTROL)

AIR COND.

THERMOSTAT

FAN COIL

(CONTROL)

AIR COND.

RED

GRY

WHT

BLU

VIO

BRN

THERMOSTAT

FAN COIL

(CONTROL) HEAT PUMP

(CONTROL)

A94060

RED

GRY

BRN

WHT

BLU

VIO

THERMOSTAT

ODTS

FAN COIL

(CONTROL) HEAT PUMP

(CONTROL)

RED

GRY

BRN

WHT

VIO

BLU

C147C96 3

THERMOSTAT

W2W2

FAN COIL

(CONTROL)

EMERGENCY HEAT RELAY

HEAT PUMP

(CONTROL)

ODTS1

ODTS2

RED

GRY

BRN

WHT

BLU

VIO

THERMOSTAT FAN COIL

(CONTROL) HEAT PUMP

(CONTROL)

ODTS

PF4MNA: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

GROUND CONNECTIONS

NOTE: Use UL listed conduit and conduit connectors for connecting

supply wire(s) to unit to obtain proper grounding. Grounding may also

be accomplished by using grounding lugs provided in control box.

A05182

Fig. 16 – Transformer Connections

MINIMUM CFM AND MOTOR SPEED SELECTION

Units with or without electric heaters require a minimum CFM. Refer to

the unit wiring label to ensure that the fan speed selected is not lower

than the minimum fan speed indicated. Fan speed selection for sizes 018,

024, 030, 036, 042, 048 and 060 is done at the fan relay printed-circuit

board. To change motor speeds, disconnect fan lead used on relay

terminal (SPT) and replace with motor speed tap desired. (Fig. 18) Save

insulating cap and place on motor lead removed from relay.

A09390

Fig. 17 – Transformer Connections

NOTE: In low static applications, lower motor speed tap should be used

to reduce possibility of water being blown off coil. Sizes 018 through

036 have 2 motor speed taps. Sizes 042, 048 and 060 have 3 motor speed

taps. Low speed (red) is designed for mismatched outdoor unit

applications. Medium speed (blue) is designed for straight matched

operations. High speed (black) is used with high external static duct

systems of straight matched systems.

The fan speed selection on the 019, 025, 031, 037, 043, 049, and 061

models is done at the motor. (Fig. 17) To change motor speeds,

disconnect fan lead from terminal 2 and move to desired speed tap; low

speed (one), medium (two), and high (three).

A97529

Fig. 18 – Fan Coil Relay and Speed Tap Terminal for

Sizes 018, 024, 030, 036, 042, 048, 060

REFRIGERANT TUBING CONNECTION AND

EVACUATION

Use accessory tubing package or field-supplied tubing of refrigerant

grade. Suction tube must be insulated. Do not use damaged, dirty, or

contaminated tubing because it may plug refrigerant flow-control

device. ALWAYS evacuate the coil and field-supplied tubing to 500

microns before opening outdoor unit service valves.

Units have sweat suction and liquid tube connections. Make suction tube

connection first.

1. Cut tubing to correct length.

2. Insert tube into sweat connection on unit until it bottoms.

3. Braze connection using silver bearing or non-silver bearing brazing

materials. Do not use solder (materials which melt below 800°F /

427°C). Consult local code requirements.

4. Evacuate coil and tubing system to 500 microns using a deep

vacuum method.

WARNING

ELECTRICAL SHOCK HAZARD

Failure to establish uninterrupted or unbroken ground could result in

personal injury and/or death.

According to NEC, NFPA 70, and local codes, the cabinet must have an

uninterrupted or unbroken ground to minimize personal injury if an

electrical fault should occur. The ground may consist of electrical wire

or metal conduit when installed in accordance with existing electrical

codes. If conduit connection uses reducing washers, a separate ground

wire must be used.

230

208

BRN

RED

YEL

BLK

SECONDARY

PRIMARY

1 2 3 4 5

CAUTION

PRODUCT DAMAGE HAZARD

Failure to follow this caution may result in product or property damage.

A brazing shield MUST be used when tubing sets are being brazed to

the unit connections to prevent damage to the unit surface and

condensate pan fitting caps.

CAUTION

PRODUCT DAMAGE HAZARD

Failure to follow this caution may result in product or property damage.

Wrap a wet cloth around rear of fitting to prevent damage to TXV and

factory-made joints.

INSULATING CAP (2)

MOTOR SPEED

TAP LEADS

COMMON YELLOW

FAN DECK

WRAPPER

SPEED TAP

TERMINAL

PCB

FAN RELAY

SINGLE SPADE

PF4MNA: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

REFRIGERANT FLOW-CONTROL DEVICE

CONDENSATE DRAINS

To connect drains, the cap openings must be removed. Use a knife to

start the opening near the tab and using pliers, pull the tab to remove the

disk. Clean the edge of the opening if necessary and install the

condensate line. Finally caulk around the lines where they exit the fitting

to retain the low leak rating of the unit.

A03002

Fig. 19 – Recommended Condensate Trap

A03013

Fig. 20 – Insufficient Condensate Trap

Units are equipped with primary and secondary 3/4-in. FPT drain

connections. For proper condensate line installations see Fig. 1, 2, 3, 4

and 5. To prevent property damage and achieve optimum drainage

performance, BOTH primary and secondary drain lines should be

installed and include properly-sized condensate traps. (Fig. 19 and

Fig. 21) Factory-approved condensate traps are available. It is

recommended that PVC fittings be used on the plastic condensate pan.

Finger-tighten plus 1-1/2 turns. Do not over-tighten. Use pipe dope.

NOTE: When connecting condensate drain lines, avoid blocking filter

access panel, thus preventing filter removal. After connection, prime

both primary and secondary condensate traps.

NOTE: If unit is located in or above a living space where damage may

result from condensate overflow, a field-supplied, external condensate

pan should be installed underneath the entire unit, and a secondary

condensate line (with appropriate trap) should be run from the unit into

the pan. Any condensate in this external condensate pan should be

drained to a noticeable place. As an alternative to using an external

condensate pan, some localities may allow the use of a separate 3/4-in

(19 mm) condensate line (with appropriate trap) to a place where the

condensate will be noticeable. The owner of the structure must be

informed that when condensate flows from the secondary drain or

external condensate pan, the unit requires servicing or water damage will

occur.

Install traps in the condensate lines as close to the coil as possible.

(Fig. 21) Make sure that the outlet of each trap is below its connection to

the condensate pan to prevent condensate from overflowing the drain

pan. Prime all traps, test for leaks, and insulate traps if located above a

living area. Condensate drain lines should be pitched downward at a

minimum slope of 1-in (25 mm) for every 10-ft (3 m) of length. Consult

local codes for additional restrictions or precautions.

A03003

Fig. 21 – Condensate Drain

ACCESSORIES

ELECTRIC HEATERS

See unit rating plate for factory-approved electric heater kits. Follow

installation instructions provided with kit.

ELECTRONIC AIR CLEANER

The Electronic Air Cleaner may be connected to fan coil as shown in

Fig. 22. This method requires a field-supplied transformer. See

Electronic Air Cleaner literature for kit requirements.

HUMIDIFIER

Connect humidifier and humidistat to fan coil unit as shown in Fig. 23

and Fig. 24. The cooling lockout relay is optional.

CAUTION

PRODUCT OPERATION HAZARD

Failure to follow this caution may result in improper product operation.

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.

WARNING

UNIT OR PROPERTY DAMAGE HAZARD