Jetson FWCD Series, Installation Operation & Maintenance, Page: 49 / 96

Jetson
www.JetsonHVAC.com
49
Installation Mechanical
General Installation Information
•
Please read and take heed of the water piping
system flushing procedure and water treatment
requirements found in Appendix that are necessary
to prepare and maintain an efficient and healthy
chiller system that utilizes brazed plate heat
exchangers.
•
Valves in the water piping upstream and
downstream of the evaporator and condenser are
installed on each FWCD chiller to isolate the heat
exchangers for maintenance and to balance/trim
the system.
•
Supply and install condenser water control
valve(s). Provisions must be made for the control
of condenser water that results in stable saturated
condensing temperature between 80°F and 145°F
through all steady state, part load and transient
operating conditions. Jetson recommends the
optional factory-installed integral water regulating
valve controlled by the unit controller.
•
Supply and install flow switch or other approved
flow proving device in the chilled water piping.
Interlock this switch with the controller to ensure
that the unit can only operate when water flow is
established. See wiring diagram for connection
point. A switch may be ordered with the unit if
desired. It will be shipped loose for field
installation.
•
When appropriate and needed, supply and install
drain valves and vent cocks in the water system
piping. Evaporator vent cocks are factory-installed
on all FWCD chillers.
•
Where specified, supply and install strainers ahead
of all pumps and control valves.
Note: FWCD chillers may be ordered with
cleanable, factory-selected wye-strainers to be
installed in the field by others for protection of the
brazed plate evaporators.
•
Supply and install suitable refrigerant pressure
relief piping to the atmosphere if required. Follow
ANSI/
ASHRAE 15 guidelines, relief
manufacturer’s guidelines, and industry standards
when working with relief valve, fusible plugs
and/or piping.
•
Start the unit under supervision of a qualified
service technician.
•
Where specified, supply and insulate the chilled
water piping as required, to prevent sweating under
normal operating conditions. Jetson provides
factory insulation on evaporator and related
components.
Storage
NOTICE
Store Units Above Freezing!
Store these units in a protected area above freezing (32°F)
only. Do not store outdoors with a protective covering such as
a plastic shroud. This can result in excessive water
condensation that could damage controls and other
components.
Noise Considerations
Locate the unit away from sound-sensitive areas. If
necessary, install isolators under the unit. Install
vibration isolators in all piping and use flexible
electrical conduit. Consult an acoustical engineer
for critical applications.
Foundation
A base or foundation is recommended for most
installations. Provide a level surface strong enough
to support the unit. See Dimension and Weights
chapter for dimensions and weights. A flexible
(isolated) concrete foundation or footings at each
loading point will reduce transmission of vibration.
Install anchor bolts in the concrete to secure the
unit.
Note: Use only anchor bolts that are flush with the
top of the foundation, not a drive-in stud type. An
example of an acceptable anchor bolt is Red Head
– Multi-Set II Drop In Shell Type. Using a flush