York H*DB012-76 Installation Manual download pdf (Page 4)

550.38-N1Y

Unitary Products Group

FIGURE 2 :

POSITIONING GROMMETS

VERIFY INDOOR REFRIGERANT ORIFICE

Refer to the Tabular Data Sheet for the outdoor unit model

and installed evaporator coil. Determine the correct orifice for

that combination.

If the orifice sizes match, nothing further is required and the

refrigerant lines may be connected per the outdoor unit

instruction. However, if another orifice should be used,

change the orifice in the coil with the following procedure:

First, relieve the holding charge by depressing the

Schrader valve located in the end of the liquid line.

Remove the liquid line fitting using 3/4" wrenches, and

remove the pre-installed orifice with a small diameter

wire or paper clip.

Remove the new orifice from the packet and verify that it

is the correct number required. Install this orifice with the

rounded end toward the coil and the flat end outward per

Figure 3 on page 4.

Thread the liquid line fitting back in place on the coil.

Tighten the fitting hand tight and turn an additional 1/8

turn to seal.

NOTE:

This procedure should be done within 2 minutes to

keep air and contaminates from entering the coil. If the

orifice cannot be replaced and the coil resealed within

2 minutes, then it should be temporarily closed to air

using masking tape (short term delay) or plugging/cap-

ping (long term delay). There is no need to purge the

coil if this procedure is done within the time limit.

Mark the data plate of the coil with the orifice installed.

INSTALLATIONS REQUIRING TXV

For installations requiring a TXV, the following are the basic

steps for installion. For detailed instructions, refer to the

Installation Instructions accompanying the TXV kit.

Install TXV kit as follows:

First, relieve the holding charge by depressing the

Schrader valve located in the end of the liquid line.

FIGURE 3 :

ORIFICE INSTALLATION

UNIT

BASE

PAN

RUBBER

ELEVATING

GROMMETS

(4 )

Note: D o N ot block drainage

h o le s w ith g ro m m e ts .

UNIT

BASE

PAN

RUBBER

ELEVATING

GROMMETS

(4 )

DISTRIBUTOR

O R IF IC E

L IQ U ID L IN E

SW IVEL CO UPLING

(See C AU TIO N below

)

Coil is under 30 PSIG helium pressure. Relieve pres-

sure from schrader valve on liquid line side.

This fitting is a right-hand thread, turn counter-clock-

wise to remove.

Use 3/4" wrenches to turn fittings. Using pliers will

cause internal damage to the fitting.

1 2 3 4 5 6 7 8 9 ... 15 16

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York H*DB012-76 Installation Manual Page 4

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