Installation
Coil Piping and
Connections
General Recommendations
Proper installation, piping, and trapping is necessary to ensure satisfactory coil operation and to prevent operational damage:
•Support all piping independently of the coils.
•Provide swing joints or flexible fittings on all connections that are adjacent to heating coils to absorb thermal expansion and contraction strains.
•If the coil was ordered with
Note: The contractor is responsible for supplying the installation hardware.
•For best results, use a short pipe nipple on the coil headers prior to making any welded flange or welded elbow type connections.
•Extended drain and vent connections are provided as standard on DD and D coils only. If extended drains and vents are required on other water coils, they must be
•Pipe coils counterflow to airflow.
•When attaching the piping to the coil header, make the connection only tight enough to prevent leaks. Maximum recommended torque is 200
•Use pipe sealer on all thread connections.
•After completing the piping connections, seal around pipe from inner panel to outer panel.
CAUTION
Prevent Coil Damage!
To prevent coil damage, do not use
Seal the piping penetration into the unit casing before insulating. Seal from inner panel to outer panel to prevent unconditioned air from entering the module. Failure to properly seal penetrations may cause water leakage.
CAUTION
Use Approved Glycol!
If glycol is used in chilled water or hot water systems, use a glycol approved for use with commercial cooling and heating systems and copper tube coils. Failure to do so may result in equipment damage.
CAUTION
Use a Backup Wrench!
Use a backup wrench when attaching piping to coils with copper headers to prevent damage to the coil header. Do not use brass connectors because they distort easily and may cause connection leaks.
28 |
