Carrier KSALA0201R22, KSALA0301410 User Manual

Low--Ambient

KSALA 0201R22

Pressure Switch

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 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 products.

Follow all safety codes. Installation must be in compliance with local and national building codes. Wear safety glasses, protective clothing, and work gloves. Have fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit.

Recognize safety information.

This is the safety--alert symbol the unit and in instructions or manuals, be alert to the potential for personal injury.

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 a hazard, which could result in personal injury or death. CAUTION is used to identify unsafe practices, which ma y 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 SHOCK HAZARD

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

Before beginning any installation or modification, be sure the main electrical disconnect is in the OFF position. Tag the disconnect switch with a suitable warning label.

These instructions cover the installation of low--ambient pressure switch Part No. KSALA0201R22 and KSALA0301410 in all single--speed air conditioners or heat pumps using R--22 or R--410A. Refer to Table 1 for kit usage. This device is a long life pressure switch that maintains head pressure by turning the fan off and on. Other accessories may be required. Refer to the Required Changes for Cooling Units and Heat Pump Units section.

WARNING

INTRODUCTION

. When you see this symbol on

KSALA 0301410

DESCRIPTION AND USAGE

The low--ambient pressure switch kit is a long life pressure switch which turns the fan on and off as shown in Table 1. It is wired in series with black fan lead. Sleeve--bearing motors can be used with this control.

INSTALLATION

The pressure switch is mounted inside the outdoor unit cabinet by using adapter tube supplied. The adapter tee is mounted to liquid service valve and tube is routed through one of the knockout holes in unit cabinet. From inside cabinet, the flare nut is attached to extender tube. (See Fig. 1.) The pressure switch is wired in series with black or common fan lead.

PROCEDURE 1—WIRING FOR ALL VOLTAGES OF COOLING UNITS

For all voltages of cooling units, refer to Fig. 2 and wire low-- ambient pressure switch as follows:

1. Disconnect black fan lead from contactor and connect this lead to yellow or violet wire from low--ambient pressure switch using connector supplied.

2. Connect blue wire from low-- ambient pressure switch to contactor terminal from which black fan lead was removed.

PROCEDURE 2—WIRING FOR HEAT PUMPS

Heat pumps require a normally closed isolation relay with the 24-- v coil connected to the C and O terminals of defrost board.

A. 208/230v Applications

For 208/230--v heat pump applications, refer to Fig. 3 and wire low-- ambient pressure switch as follows:

1. Remove black fan lead from defrost board terminal OF2 and reconnect it to NC terminal of isolation relay. Connect yellow or violet lead from low--ambient pressure switch to same NC terminal of isolation relay.

2. Connect a wire from the other NC terminal of isolation relay to OF2 terminal of defrost board. Connect blue lead from low--ambient pressure switch to same NC terminal of isolation relay.

B. 460v Applications

For 460--v heat pump applications, refer to Fig. 4 and wire low-- ambient pressure switch as follows:

1. Remove black fan lead from outdoor fan relay terminal number 3 and reconnect it to NC terminal of isolation relay. Connect yellow or violet lead from low--ambient pressure switch to same NC terminal of isolation relay.

2. Connect a wire from outdoor fan relay terminal number 3 to other NC terminal of isolation relay. Connect blue lead from low--ambient pressure switch to same NC terminal of isolation relay.

Table 1—Kit Usage and Cut In/Cut Out Pressures

KITPARTNO. REFRIGERANT PRESSURE SWITCH CLOSES

(PSIG)

KSALA0201R22 R --- 2 2 225 100 Blue and Yellow

KSALA0301410 R---410A 365 200 Blue and Violet

PRESSURE SWITCH OPENS

(PSIG)

WIRE COLORS

SERVICE FITTING CAP

VALVE CORE END

FLARE NUT

ON PRESSURE

ADAPTER TEE

EXTENDER TUBE

FLARE NUT

KSALA

LIQUID REFRIGERANT SERVICE VALVE SERVICE FITTING

SWITCH

Fig. 1 — Low--Ambient Pressure Switch

REQUIRED CHANGES FOR COOLING UNITS AND HEAT PUMP UNITS

1. Crankcase heaters are required on all applications where low--ambient controls are used.

2. Start capacitor and relay (hard start) kits are required on all single--phase applications where low--ambient controls are used.

3. Evaporator freeze thermostat KAAFT0101AAA is required on all applications where low-- ambient controls are used.

4. Wind baffles are required for temperatures below 0_For where there is substantial wind.

A00025

CONTACTOR

OF2

DEFROST

BOARD

CONNECTOR

BLACK

FAN

MOTOR

BLUE

PRESSURE

SWITCH

YELLOW

VIOLET

Fig. 2 — Power Wiring for All Voltages of

Cooling Applications

PRESSURE

BLUE

YELLOW

ISOLATION

RELAY

BLACK

OR VIOLET

FAN

MOTOR

A97326

SWITCH

NOTE: When wind baffles are used, raising unit off of pad a minimum of 4 in. is required to provide better airflow for moderate-- and high--ambient temperatures. Check pre--sale literature for available support feet or unit risers.

CAUTION

CUT HAZARD

Failure to follow this caution could result in personal injury.

To reduce risk of personal injury, wear personal protective equipment when working with wind baffles. Only experienced technicians should fabricate and install wind baffles.

5. For cooling applications only, winter start control KAAWS0101AAA must be used where low--pressure switch tripping may be encountered. Winter start control must be wired in parallel with low--pressure switch. This allows a delay of 3 minutes before low--pressure switch becomes part of control circuit. (See Fig. 5.)

A97327

Fig. 3 — Power Wiring for 208/230v Heat Pump

Applications

13 OUTDOOR

FAN RELAY

DEFROST

BOARD

ISOLATION

RELAY

BLACK

BLUE

YELLOW OR VIOLET

FAN

MOTOR

PRESSURE

SWITCH

A97328

Fig. 4 — Power Wiring for 460v Heat Pump Applications

TDR

LPS

LOW-PRESSURE SWITCH

CONTACTOR COIL

TDR

TIME DELAY RELAY

RELAY COIL

FACTORY WIRING FIELD WIRING

A93165

Fig. 5 — Low Voltage Wiring for Winter Start Control

START--UP

To start units equipped with the low--ambient pressure switch, perform the following steps:

1. Turn power on to unit.

2. Set thermostat below room temperature.

3. Wait for the unit to start. There may be a 5 --minute delay in the thermostat or in the outdoor unit.

4. Observe unit operation as described below.

a. The fan will be off when compressor starts.

b. At outdoor temperatures around 0_F, fan may not run

at all.

c. At summer temperatures, fan will start after 10 to 30

sec of compressor operation and may not turn off until thermostat is satisfied.

d. At outdoor ambients between 80_F and 20_F, fa n w i ll

turn on and off to maintain pressure as shown in Table

KSALA

/32″ x 3/8″

4 REQ'D

(5.56 x 9.53) SLOT

1/16″

(154.0)

/64″

(3.45) DIA HOLE

2 REQ'D

/8″

(9.6) TYP

/2″

(12.7)

TYP

/2″

(12.7)

TYP

KSALA

/16″

(11.6)

TYP

/64″

1 REQ'D

/32″

3 REQ'D

(6.3) TYP

/4″

BAFFLE

SCREW 10 REQ'D

MAT'L: 20 GA STEEL

SUPPORT

MAT'L: 18 GA STEEL

(3.45) DIA HOLE

(5.56) DIA HOLE

/32″

(5.56 x 50.8) SLOT

x 2

/16″

(11.6)

TYP

/4″

(6.3)

TYP

″

SUPPORT 4 REQ'D

BAFFLE 2 REQ'D

OUTDOOR

UNIT

BAFFLE ASSEMBLY

Fig. 6 — Carrier WeatherMaker®Units

A95444

KSALA

(In.)

A B C D E F G H J K L M

Wind Baffle Dimensions for Carrier WeatherMaker Units—38TKB, 38TKW, 38YKC

Height

21---7/8 17 25---1/4 10 --- 3/8 19--- 3/4 20-- -1/2 34 19--- 11/16 20---7/16 19---5/8 0 0 6 --- 1 / 8

25---7/8 17 25---1/4 10 --- 3/8 23 --- 3/4 24 ---1/2 34 23 ---11/16 24 ---7/16 23---5/8 0 11 --- 7/8 6 --- 1 / 8

31---7/8 17 25---1/4 10 --- 3/8 29 --- 3/4 30 ---1/2 34 29 ---11/16 30 ---7/16 29---5/8 0 14 --- 7/8 6 --- 1 / 8

25---7/8 21 32 11 --- 3/16 23---3/4 24 --- 1/2 42 23 --- 11/16 24---7/16 23---5/8 19 ---11/16 11 --- 7/8 6 --- 11/16

31---7/8 21 32 11 --- 3/16 29---3/4 30 --- 1/2 42 29 --- 11/16 30---7/16 29---5/8 19 ---11/16 14 --- 7/8 6 --- 11/16

37---7/8 21 32 11 --- 3/16 35---3/4 36 --- 1/2 42 35 --- 11/16 36---7/16 35---5/8 19 ---11/16 17 --- 7/8 6 --- 11/16

31---7/8 25---3/16 42 12 --- 15/16 29---3/4 30--- 1/2 50--- 7/16 29--- 11/16 30-- -7/16 29---5/8 22 ---11/16 14--- 7/8 7 ---1/16

37---7/8 25---3/16 42 15 --- 15/16 35---3/4 36--- 1/2 50--- 7/16 35--- 11/16 36-- -7/16 35---5/8 22 ---11/16 17--- 7/8 7 ---1/16

AA Unit

Unit

Size

Small 27---1/2

Medium 34--- 15/16

Large 45

(In.)

A B C D E F G H J K L M

Wind Baffle Dimensions for Carrier WeatherMaker Units with Silencer System Top

Height

23---13/16 17 25---1/4 10 --- 3/8 19 --- 3/4 20 ---1/2 34 19 ---11/16 20 ---7/16 19---5/8 0 0 6 --- 1 / 8

27---13/16 17 25---1/4 10 --- 3/8 23 --- 3/4 24 ---1/2 34 23 ---11/16 24 ---7/16 23---5/8 0 11--- 7/8 6 --- 1 / 8

33---13/16 17 25---1/4 10 --- 3/8 29 --- 3/4 30 ---1/2 34 29 ---11/16 30 ---7/16 29---5/8 0 14--- 7/8 6 --- 1 / 8

27---13/16 21 32 11 --- 3/16 23---3/4 24 --- 1/2 42 23 --- 11/16 24---7/16 23---5/8 19 ---11/16 11 --- 7/8 6 --- 11/16

33---13/16 21 32 11 --- 3/16 29---3/4 30 --- 1/2 42 29 --- 11/16 30---7/16 29---5/8 19 ---11/16 14 --- 7/8 6 --- 11/16

39---13/16 21 32 11 --- 3/16 35---3/4 36 --- 1/2 42 35 --- 11/16 36---7/16 35---5/8 19 ---11/16 17 --- 7/8 6 --- 11/16

33---13/16 25---3/16 42 12 ---15/16 29--- 3/4 30--- 1/2 50 --- 7/16 29 ---11/16 30 ---7/16 29---5/8 22--- 11/16 14---7/8 7 --- 1/16

39---13/16 25---3/16 42 15 ---15/16 35--- 3/4 36--- 1/2 50 --- 7/16 35 ---11/16 36 ---7/16 35---5/8 22--- 11/16 17---7/8 7 --- 1/16

AA Unit

Unit

Size

Small 27---1/2

Medium 34--- 15/16

Large 45

/4″ x 3/8″ (5.56 x 9.53) SLOT

4 REQ'D

5/16″

(151.5)

/8″ (3.45) DIA HOLE

2 REQ'D

/4″ (5.56) DIA HOLE 2 REQ'D

/8″

(9.6)

/2″

(12.7)

TYP

KSALA

/2″

(12.7)

/16″

(11.6)

SUPPORT

MAT'L: 18 GA STEEL

/8″ (3.45) DIA HOLE

1 REQ'D

/4″ (5.56) DIA HOLE

/16″

(11.6)

3 REQ'D

6″

(152.4)

/4″

(6.3)

BAFFLE

/4″ x 2″

(5.56 x 50.8) SLOT

/8″ (9.6)

MAT'L: 20 GA STEEL

SUPPORT

4 REQ'D

BAFFLE

2 REQ'D

SCREW 10 REQ'D

OUTDOOR

UNIT

BAFFLE ASSEMBLY

Fig. 7 --- Bryant Reliant®Units

A95445

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