York H3CE120, H1CE150, H5CE090 installation manual Extending The Service Ports, Installation

035-15407-002-B-0404

TABLE 7 - COOLING CAPACITIES AND POWER REQUIREMENTS

Model	Suction Press. & Corresponding						Temperature of Air on Condenser Coil, °F
	Temp. @ Saturation			65		75			85			95		105		115
HCE
	PSIG	°F	MBH		KW*	MBH	KW*	MBH		KW*	MBH		KW*	MBH	KW*	MBH	KW*
090	61.6	35	90		6.1	88	6.7	81		7.2	77		7.9	74	8.6	68	9.5
	68.5	40	101		6.3	96	6.8	91		7.4	87		8.1	82	8.9	77	9.7
	76.0	45	110		6.5	109	7.0	101		7.6	95		8.4	90	9.1	85	10.0
	84.0	50	120		6.6	115	7.2	109		7.8	104		8.6	99	9.4	93	10.3
120	61.6	35	123		7.7	117	8.4	112		9.1	106		9.9	100	10.8	95	11.8
	68.5	40	134		8.0	128	8.6	122		9.3	116		10.1	110	11.0	104	12.1
	76.0	45	145		8.2	139	8.8	132		9.5	126		10.4	120	11.3	113	12.3
	84.0	50	156		8.4	150	9.1	143		9.8	136		10.6	129	11.5	123	12.5
150	61.6	35	140		9.4	133	10.4	127		11.3	119		12.6	112	13.8	105	15.1
	68.5	40	151		9.6	144	10.6	137		11.5	129		12.8	122	14.1	114	15.4
	76.0	45	165		9.9	156	10.9	148		11.8	140		13.1	132	14.4	124	15.8
	84.0	50	178		10.2	169	11.2	159		12.1	151		13.4	142	14.8	134	16.1

* Includes compressor and condenser fan motor(s).

EXTENDING THE SERVICE PORTS

(Refer to Fig 7.)

1.Loosen the screws securing the service ports in shipping position.

2.Push the service ports through the corner post.

3.Tighten the screws to secure the service ports for installa- tion.

INSTALLATION

Since the condensing units are shipped with a holding charge of refrigerant-22, they can be checked for a refrigerant leak by depressing the stem on either of the service ports that extend through the cabinet. As soon as some internal pressure is re- lieved release the stem. DO NOT release the entire holding charge.

If the unit has already lost its holding charge, it should be leak tested and the necessary repairs should be made. If the unit has maintained its holding charge, you can assume that it has no leaks and proceed with the installation.

CAUTION: Dry nitrogen should always be supplied through a connection while it is being brazed or unbrazed be- cause the temperature required to make or break a brazed joint is sufficiently high to cause oxidation of the copper unless an inert atmosphere is pro- vided. The flow of nitrogen should be continued un- til the joint has cooled.

When making a braze connection, wrap a wet rag around all tubing inside the unit to help prevent damage to other components.

WARNING:The dry nitrogen should always be supplied through a pressure regulating valve.

On HCE090 models only, remove the 4-1/2" x 4-1/2" patch plates from the piping access panel on the front of the unit to ex- pose the refrigerant connections.

Before installing the liquid line between the condensing unit and the evaporator coil, prepare as follows:

1.Burnish the external surfaces of the liquid connection on the condensing unit and the end of the field-supplied piping for the liquid line.

NOTE: Clean surfaces are essential for a well-brazed con- nection.

2.Carefully clean the internal surfaces of the above. Any par- ticles left on these surfaces may lead to a future system malfunction.

NOTE: Use only copper tubing that has been especially cleaned and dehydrated for refrigerant use. If the tubing has been open for an extended period of time, it should be cleaned before being used.

The liquid line connections can now be brazed while maintain- ing a minimum flow of dry nitrogen through the piping as fol- lows:

1.Remove the cap from the 1/4" access port on the liquid line service valve.

2.Connect a supply of dry nitrogen to this access port.

NOTE: The filter-drier should be installed in the liquid line as close to the evaporator coil as possible.

Do not allow the filter-drier to be exposed to the atmos- phere for an extended period of time. Once it absorbs moisture from the atmosphere, it loses its effectiveness.

3.The matched air handlers are shipped with a small R-22 charge and they should be checked for leaks before instal- lation. Drill a small hole through the sealing cap or disc in both the liquid and suction connection. If there is a pres- sure release, the evaporator has no leaks and you can pro- ceed with installation. If the charge has been lost, the coils should be leak tested and the necessary repairs made.

4.Move the dry nitrogen supply from the access port on the liquid line service valve of the condensing unit to the hole through the suction disc on the evaporator coil.

5.Unbraze the coil's liquid line disc while maintaining a flow of dry nitrogen across the connection and through the hole in the liquid line disc.

NOTE: If the liquid line has a solenoid valve, the valve should be opened manually to permit the nitrogen to flow freely.

6.After the disc has been removed, burnish the external sur- faces and clean the internal surfaces as outlined above.

7.Move the dry nitrogen supply back to the access port on the liquid line service valve.

8.Braze the liquid line to the liquid connection on the evapo- rator coil while maintaining a minimum flow of dry nitrogen through the liquid line, the evaporator coil and the hole in the suction disc.

9.Unbraze the disc on the suction connection of the evapora- tor coil while maintaining the flow of dry nitrogen.

Unitary Products Group 9