Danfoss KP 1A User manual

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
© Danfoss A/S
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