York YCHBC Installation, WayMotorized Valve Assemblies, WayMotorized Valve Assembly, Drain Piping

FORM 115.20-NOM2 (105)

INSTALLATION

VALVE CLUSTER

2-Way Motorized Valve Assemblies

1.The motorized valve assembly should be attached to the supply header, which is the connection nearest the air outlet flange on the unit.

2.Prior to soldering the joints, operate all the hand valves to ensure that the handles will fully open and close without interference to other valves, ceiling, wall, plenum or other accessories.

3.All valves will operate at any angle with the excep- tion of the motorized valve, which must be installed with the power head above horizontal. The actuator box requires a 3/4" clearance for removal.

00186VIP

FIG. 4 – 2 WAY MOTORIZED VALVE ASSEMBLY

3-Way Motorized Valve Assembly

1.The 3-way valve assemblies will mount to the coil in only one position. On four-pipe right hand systems, a "B" valve assembly is required for the chilled water connection and an "A" valve assembly is required for the hot water connection. On left hand systems, an "A" valve assembly is required for the chilled water connection and the hot water connection. (See figure 4.)

2.Prior to soldering the joints, operate all the hand valves to ensure that the handles will fully open and close without interference to other valves, ceiling, wall, plenum or other accessories.

3.All valves will operate at any angle with the excep- tion of the motorized valve, which must be installed with the power head above horizontal. The actuator box requires a 3/4" clearance for removal.

00187VIP

FIG. 5 – 3 WAY MOTORIZED VALVE ASSEMBLY

DRAIN PIPING

Condensate drain lines must be installed with adequate slope away from the unit to assure positive drainage. YRHBC and YCHBC fan coil units require a minimum trap of 1-1/2 inches be provided in the drain line to assure proper drainage. YHBC, YPHBC, YHH, YPHH, YHYB, and YPHYB fan coil units may be located where the return air space is large enough that a negative pressure is not present, however, a trapped condensate line is recommended to ensure proper drainage of unit in case a negative condition should occur (see Installation Drawings for locations and sizes).

The drain should always be connected or piped to an acceptable disposal point sloped away from the unit at least 1/8" per foot

LD04801

FIG. 6 – TYPICAL CONDENSATE PIPING

TABLE 2 - DRAIN LINE SIZES

UNIT	PRIMARY	SECONDARY
YHBC	3/4 MPT	5/8 OD
YPHBC	3/4 MPT	3/4 MPT
YRHBC	3/4 MPT	3/4 MPT
YHH	3/4 MPT	7/8 OD
YPHH	3/4 MPT	7/8 OD
YHYB	3/4 MPT	3/4 MPT
YPHYB	3/4 MPT	3/4 MPT

YORK INTERNATIONAL 7