RT-PRC006-EN
96
Mechanical
Specifications
Factory Installed Options
Black Epoxy Pre-Coated Coils
The black epoxy coils have a thermoset
vinyl coating that is bonded to the
aluminum fin stock prior to the fin-
stamping process. The pre-coated coils
are an economical option for protection in
mildly corrosive environments.
Dehumidification Option
The dehumidification (hot gas reheat)
option shall provide increased
dehumidification. The option shall consist
of a hot-gas reheat coil located on the
leaving air side of the evaporator coil
prepiped and circuited.
The option shall be equipped with
crankcase heater(s), low pressure
switch(es), Frostat™, and a thermostatic
expansion valve(s) (TXV) as standard.
High Pressure Cutout
This is offered for units that do not have
High Pressure cutout as standard. All 3-
phase units with scroll compressors
include High Pressure Cutout as
standard.
Hinged Access Doors
Sheet metal hinges are available on the
Filter/Evaporator, Supply Fan/Heat, and
the Compressor/Control Access Doors.
Novar Return Air Sensor
This option, when used in conjunction
with Novar Controls, will contain a factory
provided and wired zone temperature
sensor located in the return air stream.
Novar Unit Controls
Optional Novar rooftop unit controls shall
be installed and tested. The Novar
electronic thermostat module will
interface to the unit microprocessor and
will control the unit to the desired stage of
cooling or heating.
Controls
Unit shall be completely factory-wired
with necessary controls and contactor
pressure lugs or terminal block for power
wiring. Unit shall provide an external
location for mounting a fused disconnect
device.
A choice of microprocessor or
electromechanical controls shall be
available.
Microprocessor controls provide for all 24
volt control functions. The resident control
algorithms shall make all heating, cooling,
and/or ventilating decisions in response
to electronic signals from sensors
measuring indoor and outdoor
temperatures. The control algorithm
maintains accurate temperature control,
minimizes drift from set point, and
provides better building comfort. A
centralized Microprocessor shall provide
anti-short cycle timing and time delay
between compressors to provide a
higher level of machine protection.
24-volt electromechanical control circuit
shall include control transformer and
contactor pressure lugs for power wiring.
Units shall have single point power entry
as standard.
Phase Monitor
Phase monitor shall provide 100%
protection for motors and compressors
against problems caused by phase loss,
phase imbalance, and phase reversal.
Phase monitor is equipped with an LED
that provides an ON or FAULT indicator.
Powered or Unpowered Convenience
Outlet
This is a GFCI, 120v/15amp, 2 plug,
convenience outlet, either powered or
unpowered. When the convenience outlet
is powered, a service receptacle
disconnect will be available. The
convenience outlet is powered from the
line side of the disconnect or circuit
breaker, and therefore will not be
affected by the position of the disconnect
or circuit breaker. This option can only be
ordered when the Through the Base
Electrical with either the Disconnect
Switch or Circuit Breaker option is
ordered.
Supply and/or Return Air Smoke
Detector
With this option, if smoke is detected, all
unit operation will be shut down. Reset
will be manual at the unit. Return Air
Smoke Detectors require minimum
allowable airflow when used with certain
models. See the Installation, Operation,
and Maintenance (IOM) manual for the
models affected and the minimum
allowable airflow required. This option is
available for microprocessor controlled
units.
Thermal Expansion Valve
All units shall have a short orifice
refrigerate control metering device. For
more exact refrigerant flow, when using
unit in low airflow applications, a Thermal
Expansion Valve option shall be available.
Through the Base Electrical Access
An electrical service entrance shall be
provided allowing electrical access for
both control and main power connections
inside the curb and through the base of
the unit. Option will allow for field
installation of liquid-tight conduit and an
external field-installed disconnect switch.
