Danfoss KP 1A Manual de usuario

279

INSTRUCTIONS

KP 1A, KP 2A, KP 5A

060R9751

RI.05.6A.22 ®RI.5A.L1.22 04-1999

Refrigerants

The ammonia controls can be used with R 711 (NH3) refrigerants.

CAUTION: Do not mount the control in a position where dirt,

sediment, or oil will affect the operation of the control.

Mounting requirements Ambient temperatures

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

Connections

Test pressure (pTEST) Enclosure

060R9751

ptest max.

KP 1A, 2A: 285 psig (20 bar pe)

KP 5A: 505 psig (35 bar pe)

STANDARD

280

Adjustment spindle(s) location

Auto reset Manual reset

KP 1A, 2A, 5A KP 1A, 5A

Manual tripping

(Electrical contacts/wiring test)

TRIP (main lever)

use FINGERS ONLY!

(Do NOT use screwdriver)

Note:

KP 1A and KP 5A w/man. reset:

Push manual reset knob during manual

tripping.

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 pressure 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 pressure rise

Terms 1-4 open on pressure drop

Example: CUT-IN = 30 psig

CUT-OUT = 10 psig

This means CUT-IN = HSP = 30 psig

and CUT-OUT = LSP = 10 psig

Note:

= Bellows movement on pressure rise

Ø= Bellows movement on pressure drop

The free terminal can be used for signal

purpose.

Load Option B

CUT-OUT on pressure 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 pressure drop

Terms 1-2 open on pressure rise

Example: CUT-IN = 250 psig

CUT-OUT = 350 psig

This means CUT-IN = LSP = 250 psig

and CUT-OUT = HSP = 350 psig

120 V a.c. 16 FLA, 96 LRA

240 V a.c. 8 FLA, 48 LRA

240 V d.c. 12 W pilot duty

Manual reset

To resume control operation after safety

cutout, push reset knob as indicated.

Note:

KP 1A, man. reset is possible only after a

pressure rise of 10 psi (0.7 bar).

KP 5A, man. reset is possible only after a

pressure drop of 43 psi (3.0 bar).

Bellows Bellows

Diff. (fixed)

KP 1A: 10 psi (0.7 bar

KP 5A: 43 psi (3 bar)

281

Adjustment

See instruction printed on top of control

Note:

Remove lockplate before adjustment.

Replace lockplate after adjustment (if desired).

Setting

(se also “Wiring”)

KP 1A (auto. reset), KP 2A and KP 5A KP 1A (manual reset ONLY)

Scale plate Scale plate

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

HIGH SET POINT (HSP) LOW SET POINT (LSP)

2. Adjust differential spindle to 2. DIFFERENTIAL is fixed.

desired DIFFERENTIAL (DIFF.) Value printed on scale plate

Note:

KP 5A (manual reset) has fixed diff.

Value printed on scale plate.

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

Example: Example:

HSP – DIFF. = LSP LSP + DIFF. = HSP

30 psig – 20 psi = 10 psig 12 psig + 10 psi = 22 psig

(2.1 bar) (1.4 bar) (0.7 bar) (0.8 bar) (0.7 bar) (1.5 bar)

10 psi (0.7 bar) / rev KP 1

7 psi (0.5 bar) / rev. KP 2

3 psi (0.2 bar) / rev KP 1

1.5 psi (0.1 bar) / rev. KP 2

4 psi (0.3 bar) / rev. KP 5

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