Danfoss Filter driers sight glasses Service guide

Fitters notes	Filter driers & sight glasses
Contents					Page
	Function . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . .	. . . . . 53
	Filter drier selection . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . .	. . .	.	.	53
	Location in refrigeration system . . . . . . . . . . . .	. . . . . . . . . . . . . . . .	. . .	.	.	54
	Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
	Soldering . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . .	. . .	.	.	56
	Operation . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . .	. . .	.	.	56
	Replace the filter drier when . . . . . . . . . . . .	. . . . . . . . . . . . . . . .	. . .	.	.	56
	DCR . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . .	. . .	.	.	57
	Using gaskets . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . .	. . .	.	.	57
	Mounting gaskets . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . .	. . .	.	.	57
	Disposal . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . .	. . . . . 57
	Filter drier replacement . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . .	. . .	.	.	57
	Special filters from Danfoss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
	Combidriers type DCC and DMC . . . . . . . . . .	. . . . . . . . . . . . . . . .	. . .	.	.	58
	Burn-out filter, type 48-DA . . . . . . . . . . . . .	. . . . . . . . . . . . . . . .	. . .	.	.	58
	Special application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
	DCL/DML filter driers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
	Dimensioning . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . .	. . .	.	.	59
	EPD (Equilibrium Point Dryness) . . . . . . . . . .	. . . . . . . . . . . . . . . .	. . .	.	.	59
	Drying capacity (water capacity) . . . . . . . . . .	. . . . . . . . . . . . . . . .	. . .	.	.	59
	Liquid capacity (ARI 710*) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
	Recommended system capacity . . . . . . . . . .	. . . . . . . . . . . . . . . .	. . .	.	.	60
	Filter driers from Danfoss . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . .	. . .	.		. 60

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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	Filter driers & sight glasses
Function	To ensure optimum function the refrigeration
	system must be internally clean and dry.
	Before starting the system, moisture must be
	removed by evacuation at a max. pressure of 0.05
	mbar abs.
	During operation, dirt and moisture must be
	collected and removed. This is performed by a
	filter drier containing a solid core consisting of:
		Molecular Sieves
		Silica gel (low effectiveness - not used in
		Danfoss driers)
		Activated aluminium oxide and a polyester
				Ah0_0001
		mesh A inserted in the filter outlet.
	DML:		100% Molecular Sieves
	DCL:		80% Molecular Sieves
			20% Activated aluminium

The solid core can be compared to a sponge’s ability to soak up water and retain it.

Molecular Sieves retain water, whereas activated aluminium oxide retains water and acids.

The solid core B together with the polyester mat A also acts as a dirt filter.

The solid core retains large dirt particles and the polyester mat small ones.

The filter drier is thus able to collect all dirt particles larger than 25 micron.

Filter drier selection	The filter drier must be selected to suit the
	connections and the capacity of the refrigeration
	system.
	If a filter drier with solder connections is required,
	a Danfoss type DCL/DML filter drier can be
	used to advantage. It has an extra-high drying
	capacity which prolongs the interval between
	replacements.
	A collar on the connector A indicates that the
	connection is a mm size. If the connector A is
	plain, i.e. no collar, the connector is an inch size.
	Type DCL can be used for CFC/HCFC refrigerants.
	Type DML can be used for HFC refrigerants. See	Ah0_0018
	page 60 for more details.

© Danfoss A/S (AC-DSL/MWA), 10 - 2006

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

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