200.108-IOM (FEB 2018)
Page 5
RTF ROOFTOP FREEZER SYSTEMS
INSTALLATION
PREINSTALLATION REQUIREMENTS
TRAINING & SAFETY CONSIDERATIONS
The Johnson Controls – Frick RTF evaporator design utilizes
the •nest materials and corrosion protection to deliver de-
pendable and consistent cooling for coolers and freezers.
This manual provides the information needed for safe instal-
lation, operation, and maintenance. Close attention to the
instructions and guidelines provided will ensure the longest
possible system life and dependable, consistent performance.
CAUTION
JCI-Frick recommends that only experienced industrial
refrigeration contractors, operators, and maintenance
technicians be used to install, operate and maintain the
RTF unit. Before working on the RTF unit, it is further
recommended that they be provided formal training on
the RTF’s design and features that incorporates reading
and understanding this manual.
Installation, operation, and maintenance of the Frick RTF unit
involves rotating machinery operating at high speed and high
voltage. Normal operations and maintenance procedures may
require working at elevations, entry into enclosed spaces,
and the use of hand and power tools. Taking these consid-
erations into account, it is clear that safety should always
be the top priority.
We recommend that every site installing an RTF unit analyze
and develop an installation-speci•c safety regime that takes
into account such variables as speci•c site and unit features,
personnel quali•cations, hazard identi•cation, etc.
NOTICE
Configure all power switches and controls to provide an
open, safe circuit before and during maintenance pro-
cedures, until the system is cleared by management for
normal on-line operations. For extended shutdowns, it
is recommended that a qualified technician remove fuses
from “fused-disconnect panels” or otherwise open the
circuit in an accepted, secure manner.
JCI-Frick recommends that the following elements related
to operational safety be incorporated into every client's RTF
safety requirements and safety program.
Fans – All fan covers, guards, and shaft retainers (if any)
must be in place before applying power to an RTF unit. Al-
ways disengage and lock out power before allowing interior
inspections. To prevent foreign objects from being sucked
into rotating fan blades, never allow operation with the
doors open.
Enclosed space inspections – Inspections of coils, drain
pans, guards, etc., require machinery lockout and the use
of a “lookout buddy” at a minimum – consult your internal
safety policy and OSHA requirements for additional recom-
mended safety procedures.
Vibration and noise – Discontinue or stop machinery that
emits unusual vibration and noise. The source of the distur-
bance must be investigated, identi•ed, and corrected before
testing or placing the system back in operation.
Wet Surface Precautions – Poorly maintained and wetted
machinery requires care to avoid electrical shocks from in-
adequate or loose •eld wiring and connections. All personnel
must lock out and tag machinery before working on the unit.
Proper safety precautions such as the use of insulating soles
and gloves and a trained “lookout buddy” are indispensable.
Ice formation in cold weather can present slip and fall haz-
ards around a rooftop penthouse unit. Ice related safety
procedures should be mandatory when the daily ambient
temperature falls below 40°F.
RTF units typically operate in a continuous-duty capacity and
must be properly located, installed, and connected in the
•eld (by others). It is imperative that the electrical power and
control wiring, refrigerant lines and air duct be adequately
sized and properly installed. The engineering plans, piping
layouts, etc. for all peripheral “•eld” work should be detailed
in accordance with local and governing codes and the best
industry standards and practices.
If you have any comments or questions regarding this manual
or the RTF unit, you are urged to call your installing contrac-
tor and/or the local Frick sales representative.
PRELIMINARY SITE LAYOUT CONSIDERATIONS
All Frick RTF units must be located for accessibility on the
roof and air !ow in and out of the cold space. The Frick RTF
enclosure has two access doors, one on either side of the
unit. Provision must be made for service and maintenance
access to both of these locations.
Air is drawn into the RTF unit along one side, entering up-
ward through the bottom of the unit. Colder air is discharged
downward along the opposite side of the unit. Adequate
free !ow area must be available for returning air to enter
the bottom of the RTF unit. Excessive restriction will reduce
the air !ow and thus the cooling capacity of the RTF unit
It is the owner’s responsibility to properly locate the RTF
unit in consultation with a quali•ed engineer before laying
out structural supports and installing the penthouse unit.
In general, Frick RTF units must be uniformly supported
around the perimeter either by roof curb or building structural
steel under roof decking.
PRELIMINARY FIELD PIPING
DESIGN CONSIDERATIONS
Before •nalizing the refrigerant piping plans for the new
RTF unit, it is recommended that related plans for potential
expansion of the refrigeration system and building be dis-
cussed with your refrigeration system designer and Johnson
Controls-Frick®sales representative. Incorporating appropri-
ate pipe and opening sizes now (in light of existing and future
needs) is often the most economical long term strategy.
CAUTION
Avoid hydraulic lockup caused by trapped liquid. When
there is an increase in ambient temperature and liquid
refrigerant confined in rooftop piping, the resulting
expansion pressure has the potential to cause
refrigerant lines to burst.
