Piping, Installation – York YHYB User Manual

Page 6

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INSTALLATION

6

YORK INTERNATIONAL

FORM 115.20-NOM2 (105)

7

YORK INTERNATIONAL

INSTALLATION

FORM 115.20-NOM2 (105)

Prior to connecting to the fan coil,

all external piping must be purged

of debris.

When connecting piping or valve

kits to fan coil units, do not bend or

reposition the coil header tubing for

alignment purposes. This could cause

a tubing fracture resulting in a water

leak when water pressure is applied

to the system.

Many valve packages will not phys-

ically allow all components to fit

over an auxiliary drain pan. It is the

installers responsibility to ensure ad-

equate condensation prevention. The

installer must also ensure that there

is no condensate drippage onto elec-

trical components beneath insulated

components.

PRECAUTIONS

1. Flush all field piping prior to connection to remove

all debris.

2. Use wet cotton rags to cool valve bodies when

soldering.

3. Open all valves (mid-way for hand valves, manually

open on motorized valves) prior to soldering.

4. When soldering to bronze or brass, heat the pip-

ing while in the socket/cup and begin introducing

the solder when the flux boils rapidly. Avoid direct

flame into the solder joint.

5. Heat can only be applied to the cup of the valve body

for a minimal time before damage occurs (even with

the use of wet rags.

6. Avoid rapid quenching of solder joints, as this will

produce joints of inferior quality.

7. The valve package will not support the weight of

the connecting pipes. All pipes, which are connected

to the units, must be completely supported prior to

connection to the unit.

8. Provisions must be made for expansion and con-

traction of piping systems. All horizontal and

vertical risers, including runouts, must be able to

withstand significant movement with temperature

changes. Failure to do so will result in damage and

failure of piping, fittings and valves throughout the

building.

9. Never insulate the heads or motorized portion of

control valves. Damage can occur in the form of

excessive heat build up and interference to the

operation and moving parts will result.

10. All piping made in the field should be installed with

consideration of additional space for any electrical

routing that may be required.

11. Hydronic systems are not designed to hold pres-

surized air and should only be tested with water.

After the system has been proven leak free, all lines and

valve control packages must be insulated as specified

on the building plans.

These units are provided with six (6) mounting holes

(see drawings for details). Metal washers and nuts of

the proper size are to be provided by the installer. When

necessary, use shims to obtain the proper level. This will

ensure that the condensate will drain from the unit.

PIPING

These units employ a hydronic coil designed for use

with either hot or chilled water.

All piping must be adequately sized to meet the design

water flow requirements as specified for the specific

installation. Piping must be installed in accordance with

all applicable codes.

PIPE SIZES

All models except YHYB/YPHYB:

• HW/CW coils are 3/8" OD tubing.
• Tubing connections are 5/8" OD.

Models YHYB/YPHYB:

• HW/CW coils are 1/2" OD tubing.
• Tubing connections are 7/8" OD.

Manual air vents are provided standard on all coils

All chilled water piping must be insulated to prevent

condensation.

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