Danfoss KP Series User manual

Pressure Controls

KP 61 →81

KP 61, 62, 63, 68, 69 vapor charge

KP 71, 73, 75, 77, 79, 81 adsorption charge (cross ambient)

Types

Auto reset Manual reset Auto reset

(w/o hand knob) w/ hand switch

Bulb types

Mounting requirement

Vapor charge

Max. bulb temperature Ambient temperatures

Enclosure

CAUTION: The mounting panel must be plane to avoid damage of control.

Cable entry Required cap. tube length on evaporator

80 in. cap. tube: min. 16 in.

196 in. cap. tube: min. 22 in.

060R9748

INSTRUCTIONS

2 RI.5D.A2.22 →DKRCC.PI.C0A.A1.22-520H2749 © Danfoss A/S

Wiring

CAUTION: Disconnect power supply before

wiring connections are made to avoid

possible electrical shock or damage to

equipment.

All wiring should conform to the National

Electrical Code and local regulations.

Terminal block

CAUTION: Use terminal screws furnished in

the contact block.

Use tightening torque 20 lb. in. (2.3 Nm).

Use copper wire only.

Contact load ratings

Load Option A

CUT-OUT on temperature drop

Wire terminals 1-4:

CUT-IN = High Set Point (HSP)

see “Setting”

CUT-OUT = Low Set Point (LSP)

see “Setting”

Terms 1-4 close on temperature rise

Terms 1-4 open on temperature drop

Example: CUT-IN = +50°F (+10°C)

CUT-OUT = +40°C (+4.5°C)

This means

CUT-IN = HSP = +50°F (+10°C)

and

CUT-OUT = LSP = +40°F (+4.5°C)

Note:

⇑ = Bellows movement on pressure rise

⇓ = Bellows movement on pressure drop

The free terminal can be used for signal

purpose.

Load Option B

CUT-OUT on temperature rise

Wire terminals 1-2:

CUT-IN = Low Set Point (LSP)

see “Setting”

CUT-OUT = High Set Point (HSP)

see “Setting”

Terms 1-2 close on temperature drop

Terms 1-2 open on temperature rise

Example: CUT-IN = +32°F (+0°C)

CUT-OUT = +50°F (+10°C)

This means

CUT-IN = LSP = +32°F (+0°C)

and

CUT-OUT = HSP = +50°F (+10°C)

Manual reset

To resume control operation after safety cut-

out, push reset knob as indicated.

Note:

Man. reset is possible only after a

temperature rise of xed dierential (example

5.4°F)

Note:

use FINGERS ONLY!

(Do NOT use

screwdriver)

KP w/ manual reset

Note:

Push manual reset knob during manual

tripping.

Manual tripping

(Electrical contacts/wiring test)

Note:

use FINGERS ONLY!

(Do NOT use screwdriver)

KP w/ auto reset

Main

lever

Contacts

position

Main

lever

Contacts

position

Contacts

position

Contacts

position

120 V a.c. 16 FLA, 96 LRA

240 V a.c. 8 FLA, 48 LRA

240 V .c. 12 W pilot duty

Adjustment spindles location

Note!

Remove lockplate before thermostat

adjustment. Replace lockplate after

adjustment (if desired).

RANGE DIFFERENTIAL

See printed instruction on top of control See printed instruction on top of control

increase temp. (warmer): turn CW Increase: turn CW

decrease temp. (colder): turn CCW decrease: turn CCW

(use adjustment knob) (use adjustment knob or screwdriver)

Determination of dierential

For KP w/ vapor charge and auto. reset (KP 61, KP 62, KP 63, KP 68, KP 69): Use graphs to determine correct dierential

Example:

HSP = +45°F (+5.6°C) => DIFF (from graph):

LSP = +32°F (0°C 13°F (7.2°C) (value which has to be

set on di. scale). For KP w/ adsorption charge (KP 71, KP 73, KP 75, KP 77, KP 79, KP 81):

The dierential will be HSP less LSP

Example: HSP – LSP = DIFF.

45°F – 35°F = 10°F

(7°C) (5°C) (2°C)

Note:

(Load Option A) (Load Option B)

CUT-IN = HSP or CUT-IN = LSP

CUT-OUT = LSP CUT-OUT = HSP

See “Wiring”

4 RI.5D.A2.22 →DKRCC.PI.C0A.A1.22-520H2749 © Danfoss A/S

Setting

For KP 61, 62, 63, 68, 69, 71, 73, 75, 77, 79 and 81 w/ AUTO RESET KP 61 and KP 71 w/ MAN. RESET

1. Adjust range spindle to desired 1. Adjust range spindle to desired

HIGH SET POINT (use hand knob) LOW SET POINT

2. Adjust dierential spindle to 2. DIFFERENTIAL is xed.

desired DIFFERENTIAL Value printed on scale plate

Note:

To nd correct dierential, see “Determination of dierential”

HIGH SET POINT minus DIFFERENTIAL equals LOW SET POINT HIGH SET POINT minus DIFFERENTIAL equals LOW SET POINT

Example: Example:

HSP – DIFF. = LSP HSP – DIFF. = LSP

45°F – 10°F = 35°F 37.4°F – 5.4°F = 32°F

(7°C) (5°C) (2°C) (3°C) (3°C) (0°C)

KP w/ hand switch CAUTION:

• Hand switch breaks circuit by micro contact gab.

• Use hand switch for service on refrigeration parts only

• Cut out main switch before service on electrical parts

KP 61 060L2003 Vapor charge

KP 73 060L2014 Adsorption charge

Switch position Contacts position

Aut. Automatic control operation

μ Stop 1 and 2 are closed

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