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40FKA

Comfort Heat Pump System

002-006

Installation Instructions

NOTE:

Read the entire instruction manual before starting the

installation.

This symbol

indicates a change since the last issue.

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause 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 pack-
aged with kits or accessories when installing.

Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for brazing operations. Have fire extinguisher
available. Read these instructions thoroughly and follow all

warnings or cautions attached to the unit. Consult local building
codes and National Electrical Code (NEC) for special require-
ments.

Recognize safety information. This is the safety-alert symbol

.

When you see this symbol on the unit and in instructions manuals,
be alert to the potential for personal injury.

Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. 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 would 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.

Fig. 1—Comfort Heat Pump system

A98049

40FKA FAN COIL

THERMIDISTAT ™ 

CONTROL

OUTDOOR TEMPERATURE SENSOR

Visit www.carrier.com

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

Book 1

4

Tab

3d 2e

PC 101

Catalog No. 534–017

Printed in U.S.A.

Form 40FK-7SI

Pg 1

3-02

Replaces: 40FK-5SI

Summary of Contents for 40FKA

Page 1: ...sult local building codes and National Electrical Code NEC for special require ments Recognize safety information This is the safety alert symbol When you see this symbol on the unit and in instructions manuals be alert to the potential for personal injury Understand the signal words DANGER WARNING CAUTION and NOTE These words are used with the safety alert symbol DANGER identifies the most seriou...

Page 2: ...on of a secondary drain pan under entire unit to avoid damage to ceiling is recommended 40FKA Fan Coils can be installed for upflow and horizontal left applications as factory shipped See Fig 2 4 and 8 Units can be installed for horizontal right applications with field modifications See Fig 5 Units may be converted for downflow applications using factory authorized accessory kit NOTE To ensure pro...

Page 3: ...support rail on left side of unit and reinstall on coil support 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 splitter B from coil seal assembly by remov ing 3 screws See Fig 6 factory shipped inset c Remove filler plate A and install air splitter B in place of filler plate d Install fill...

Page 4: ... panels 3 Recommended method of securing for typical applications 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 Fig 4 Slope Coil in Horizontal Left Application Factory Ready A00096 UNIT FIELD SUPPLIED HANGING STRAPS LOW VOLT ENTRY OPTIONS POWER ENTRY OPTIONS SECONDARY DRAIN 002 005 21 IN 006 24 IN FRONT SERVICE CLEARANCE FULL ...

Page 5: ...nconditioned space must be insulated and covered with vapor barrier DUCTWORK ACOUSTICAL TREATMENT Metal duct systems that do not have a 90 elbow and 10 ft of main duct to first branch takeoff may require internal acoustical insula tion lining As an alternative fibrous ductwork may be used if constructed and installed in accordance with the latest edition of SMACNA construction standard on fibrous ...

Page 6: ...rating plate Be sure that electrical service provided by the utility is sufficient to handle the additional load imposed by this equipment See unit wiring label for proper field high and low voltage wiring Make all electrical connections in accordance with 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 su...

Page 7: ...HEAT STAGE 1 COOL STAGE 1 FAN 24 VAC HOT 24 VAC COMM DEHUMIDIFY HUMIDIFY N A OUTDOOR SENSOR CONNECTION Y Y2 HUMIDIFIER 24 VAC OUTDOOR SENSOR REMOVE J2 JUMPER FOR HEAT STAGING REMOVE J1 JUMPER FOR DEHUMIDIFY MODES Fig 10 40FKA Fan Coil Wiring with 2 Speed Air Conditioner A98233 O W2 W W1 Y1 W2 G R W2 W1 INDOOR CONTROL 40FKA FAN COIL 2 SPEED AIR CONDITIONER Y1 G C Y2 R Y1 C DHUM HUM B S1 S2 Y Y2 R O...

Page 8: ...o prevent damage to thermostatic expansion valve remove sensor bulb from vapor tube while brazing vapor connections Units have sweat suction and liquid tube connections Make suction tube connection first 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 with Sil...

Page 9: ...of heaters for which airflow also marked is approved For increased comfort select the narrowest kw range matching the heater size for example 0 10 for 10 kw heater This airflow must be greater than the minimum CFM for electric heater application with the size system installed for safe and continuous operation See Table 4 and 5 for airflow delivery and minimum CFM Note that airflow marked is the ai...

Page 10: ...peed factory setting 50 percent cooling mode airflow 2 MED speed move connector to MED 65 percent cooling mode airflow 3 HI speed move connector of HI 100 percent cooling mode airflow See Fig 19 F as indicated LOW VOLTAGE CIRCUIT FUSING AND REFERENCE The low voltage circuit is fused by a board mounted 5 amp automotive fuse placed in series with the transformer SEC2 and the R circuit The C circuit ...

Page 11: ...00 1470 880 1175 680 910 545 725 440 570 875 525 680 1050 610 795 1225 700 910 1400 006 036 042 048 060 1050 1225 1400 1750 840 980 1120 1400 1100 1470 1835 880 1175 1470 745 995 1240 595 795 995 525 745 1050 610 870 1225 700 995 1400 875 1240 1750 NOTE 1 The above airflows result with the AC HP CFM ADJUST select jumper set on NOM 2 Airflow can be adjusted 15 percent or 10 percent by selecting HI ...

Page 12: ...HEATER KW RANGE 0 10 0 15 0 20 0 30 LO NOM HI LO NOM HI LO NOM HI LO NOM HI 005 30 000 975 975 1040 1100 1100 1100 36 000 980 1085 1250 1100 1100 1250 1250 1250 1250 42 000 1140 1270 1460 1140 1270 1460 1250 1270 1460 1500 1500 1500 48 000 1305 1450 1665 1305 1450 1665 1305 1450 1665 1500 1500 1665 006 36 000 1100 1100 1250 1350 1350 1350 42 000 1140 1270 1460 1350 1350 1460 1525 1525 1525 48 000 ...

Page 13: ...e fan coil blower is operating HUMIDIFIER CONNECTIONS The HUM1 and HUM2 terminals are not always energized during blower operation as described under Auxiliary Terminals Section To ensure humidifier will operate properly during Super Comfort Heat mode use HUM output of Thermidistat Control or Comfort Zone II to control humidifier operation Alternatively the 24 vac signal can be sourced from the W ...

Page 14: ... is defective if it will not start Go through the steps described below before replacing control module Easy Select Board or entire motor The control module is available as a replacement part IF MOTOR TURNS SLOWLY 1 Replace panel Motor may appear to run slowly if access panel is removed 2 It is normal operation to run noticeably slower if G terminal is not energized in cooling or heat pump modes I...

Page 15: ... 20 875 0 10 725 0 90 30 90 0 0 0 5 625 TM J2 JUMPER PULL FOR HEAT STAGING 12 PIN CONNECTOR PL 1 PIN 1 PIN 12 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 16 PIN PLUG DEHUMIDIFICATION INPUT 24 VAC HOT AUXILARY HEAT STAGE 1 AUXILIARY HEAT STAGE 2 LOW SPEED COMPRESSOR SINGLE OR HI SPEED COMPRESSOR FAN REVERSING VALVE COMMON J1 JUMPER PULL FOR DEHUMIDIFICATION CONTROL LOW VOLTAGE SCREW TERMINALS Table 7 Wi...

Page 16: ... for maintenance procedures As with any mechanical equipment personal injury can result from sharp metal edges etc therefore care should be taken when removing parts Using the Owner s User Manual furnished in outdoor unit the installing technician should explain system operation to the con sumer with particular emphasis on indoor fan coil operation sounds and filter maintenance Fig 19 40FKA Printe...

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