75
RT-PRC007-EN
Mechanical
Specifications
Exhaust Air
Barometric Relief
The barometric relief damper shall be
optional with the economizer. Option
shall provide a pressure operated
damper for the purpose of space
pressure equalization and be gravity
closing to prohibit entrance of outside air
during the equipment “off” cycle.
Power Exhaust Fan
Power exhaust shall be available on all
units and shall be factory installed. It
shall assist the barometric relief damper
in maintaining building pressurization.
Unit Options
Service Valves
Service valves shall be provided factory
installed and include suction, liquid, and
discharge 3-way shutoff valves.
Through-The-Base Electrical Provision
An electrical service entrance shall be
provided which allows access to route all
high and low voltage electrical wiring
inside the curb, through the bottom of the
outdoor section of the unit and into the
control box area.
Non-Fused Disconnect Switch
A factory installed non-fused disconnect
switch with external handle shall be
provided and shall satisfy NEC
requirements for a service disconnect.
The non-fused disconnect shall be
mounted inside the unit control box.
GFI Convenience Outlet (Factory
Powered)
A 15A, 115V Ground Fault Interrupter
convenience outlet shall be factory
installed. It shall be wired and powered
from a factory mounted transformer.
Unit mounted non-fused disconnect with
external handle shall be furnished with
factory powered outlet.
GFI Convenience Outlet (Field Powered)
A 15A, 115V Ground Fault Interrupter
convenience outlet shall be factory
installed and shall be powered by
customer provided 115V circuit.
Hinged Service Access
Filter access panel and supply fan access
panel shall be hinged for ease of unit
service.
Condenser Coil Guards
Factory installed condenser vinyl coated
wire mesh coil guards shall be available
to provide full area protection against
debris and vandalism.
Stainless Steel Drain Pans
Sloped stainless steel evaporator coil
drain pans are durable, long-lasting and
highly corrosion resistant.
Black Epoxy Pre-Coating for Condenser
Coil
A thermoset vinyl coating 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.
High Efficiency Condenser Coil with or
without Black Epoxy Pre-Coating
The High Efficiency Condenser Coil option
shall provide an additional row of
condenser coil to increase unit
performance and energy efficiency. High
Efficiency Condenser Coil shall have 3/8”
copper tubes mechanically bonded to
lanced aluminum plate fins.
Discharge Air Sensing
Provides true discharge air sensing in
heating and cooling models. This sensor is
a status indicator readable through
Tracer, Tracker or LCI-R. Discharge air
sensing is standard with Variable Air
Volume (VAV) units, optional with
Constant Volume (CV) units.
Clogged Filter Indication
This optional factory installed differential
pressure switch allows dirty filter
indication at the zone sensor with service
LED. When closed, the dirty filter switch
will light the service LED on the zone
sensor and allow the unit to continue
normal operation.
Roof Curb
The roof curb shall be designed to mate
with the unit and provide support and a
water tight installation when installed
properly. The roof curb design shall allow
field-fabricated rectangular supply/return
ductwork to be connected directly to the
curb when used with downflow units.
Curb design shall comply with NRCA
requirements. Curb shall ship knocked
down for field assembly and include
wood nailer strips.
Zone Sensors
Shall be provided to interface with the
ReliaTel unit controls and shall be
available in either manual, automatic
programmable with night setback, with
system malfunction lights or remote
sensor options.
Remote Potentiometer
A remote potentiometer shall be
available to remotely adjust the unit
economizer minimum position.
High Temperature Thermostats
Field installed, manually resettable high
temperature thermostats shall provide
input to the unit controls to shut down the
system if the temperature sensed at the
return is 135 F or at the discharge 240 F.
Reference Enthalpy Kit
Field installed enthalpy kit shall provide
inputs for economizer control based
upon comparison of the outside air
stream to a definable enthalpy reference
point. May also be factory installed.
Comparative Enthalpy Kit
Field installed enthalpy kit shall provide
inputs for economizer control based
upon comparison of the enthalpies of
the return and outdoor air streams. Also
available factory installed.
LP Conversion Kit
Field installed conversion kit shall provide
orifice(s) for simplified conversion to
liquefied propane gas. No change of gas
valve shall be required.
BAYCO2K005*
— Wall-mounted CO
2
sensor has the ability to monitor space
occupancy levels within the building by
measuring the parts per million of CO
2
(Carbon Dioxide) in the air. As the CO
2
levels increase, the outside air damper
modulates to meet the CO
2
space
ventilation requirements.
BAYCO2K006*
— Duct-mounted CO
2
sensor has the ability to monitor space
occupancy levels within the building by
measuring the parts per million of CO
2
(Carbon Dioxide) in the air. As the CO
2
levels increase, the outside air damper
