Danfoss KVP, KVR, KVL, KVC, KVD Service guide

Fitters notes	Pressure regulators
Contents				Page
	Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . .	.	.	37
	KVP evaporating pressure regulator . . . . . . . . . . . . . . . .	. . . . . . . . . . .	. .		. 37
	KVR condensing pressure regulator . . . . . . . . . . . . . . . .	. . . . . . . . . . .	. .		. 38
	KVL crankcase pressure regulator . . . . . . . . . . . . . . . . .	. . . . . . . . . . .	. .		. 38
	KVC capacity regulator . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . 39
	KVD receiver pressure regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
	Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . .	.	.	40
	Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
	Soldering/brazing . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . .	.	.	40
	Pressure testing . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . .	.	.	41
	Evacuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
	Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . .	. . .	.	. 42
	KVP evaporating pressure regulators . . . . . . . . . . . . . . . .	. . . . . . . . . . .	.	.	42
	KVL crankcase pressure regulators . . . . . . . . . . . . . . . . .	. . . . . . . . . . .	.	.	42
	KVR + NRD condensing pressure regulators . . . . . . . . . . . .	. . . . . . . . . . .	. .		. 42
	KVR + KVD condensing pressure regulators . . . . . . . . . . . .	. . . . . . . . . . .	. .		. 43
	Danfoss pressure regulators . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . .	.	.	43

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© Danfoss A/S (AC-DSL/MWA), 10 - 2006

DKRCC.PF.000.G1.02 / 520H1459

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Notes

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DKRCC.PF.000.G1.02 / 520H1459

© Danfoss A/S (AC-DSL/MWA), 10 - 2006

Fitters notes	Pressure regulators

Application	Type KV pressure regulators will control the low
	and high pressure sides of the system under
	varying load conditions:
	KVP	is used as an evaporating pressure
		regulator.
	KVR	is used as a condensing pressure regulator.
	KVL	is used as a crankcase pressure regulator.
	KVC	is used as a capacity regulator.
	NRD	is used as a differential pressure regulator
		and as a receiver pressure regulator.
	KVD	is used as a receiver pressure regulator.
	CPCE is used as a capacity regulator.

Ak0_0031

KVP evaporating	The evaporating pressure regulator is installed in
pressure regulator	the suction line after the evaporator to regulate
	the evaporating pressure in refrigeration sys-
	tems with one or more evaporators and one
	compressor.
	In such refrigeration systems (operating on
	different evaporating pressures) KVP is installed
	after the evaporator with the highest evaporating
	pressure.
	Each evaporator is activated by a solenoid valve
	in the liquid line. The compressor is contolled by
	a pressure switch in a pump down function.
	The maximum pressure on the suction side
	corresponds to the lowest room temperature.
	In refrigeration systems with parallel coupled
	evaporators and common compressors, and
	where the same evaporating pressure is required,
	KVP must be installed in the common suction
	line.

The KVP evaporating pressure regulator has a pressure gauge connection for use when setting the evaporating pressure. KVP maintains constant pressure in the evaporator.

KVP opens on rising inlet pressure (evaporating pressure).

Ak0_0025

Ak0_0019

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Ak0_0023

© Danfoss A/S (AC-DSL/MWA), 10 - 2006

DKRCC.PF.000.G1.02 / 520H1459

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