Inside The Rc Series Console - Johnson Controls RC Series Engineering Manual

RC SERIES ENGINEERING GUIDE

Inside the RC Series Console

Refrigerant
RC Series products all feature zero ozone depletion and low global
warming potential refrigerant R-410A.
Cabinet
All units are all constructed of corrosion resistant galvanized sheet
metal with white polyester powder coat paint rated for more than
1000 hours of salt spray. Refrigerant circuit is designed to allow
primary serviceability from the front. One access panel allows
servicing of the fan motor, blower, and drain pan. Cabinet is
designed to match "industry" foot print for ease of replacement.
Drain Pan
All condensate connections are welded stainless steel tubes for
economical corrosion free connections. Bacteria resistant stainless
steel drain pan is designed to promote complete drainage and will
never rust or corrode. Complete drainage helps to inhibit bacterial or
microbial growth. Units feature an internally trapped condensate line.
Compressors
High efficiency R410A rotary compressors are used on every
model. Rotary compressors (available in 208-230V & 265V 60Hz
Single Phase) provide both the highest efficiency available and
great reliability.
Electrical Box
Unit controls feature quick connect wiring harnesses for easy
servicing. Large 75VA transformer assures adequate controls
power for accessories.
Thermostatic Expansion Valve
All RC Series models utilize a balanced port
bi-directional thermostatic expansion valve
(TXV) for refrigerant metering. This allows
precise refrigerant flow in a wide range of
entering water variation (20 to 120°F [-7 to
49 °C]) found in geothermal systems.
Water to Refrigerant Coaxial Heat Exchanger Coil
Large oversized coaxial refrigerant to water
heat exchangers provide unparalleled
efficiency. The coaxes are designed for
low pressure drop and low flow rates.
All coaxes are pressure rated to 450 psi
water side and 600 psi on the refrigerant
side. Optional ThermaShield coated water-
to-refrigerant coaxial heat exchanger is
available to prevent condensation in low
temperature loop operation.
Service Connections and
Serviceability
Two Schrader service ports are provided
in every unit. The suction side and
discharge side ports are for field charging
and servicing access. All valves are 7/16˝
SAE connections. All water and electrical
connections are made from the front of
the unit. Unit is designed for front access
serviceability.
4-Way Reversing Valve
RC Series units feature a reliable all-brass pilot operated refrigerant
reversing valve. The reversing valve operation is limited to change
of mode by the control to enhance reliability.
3-Speed ECM Constant Torque Motors
The 3-speed ECM is a 'Constant Torque' ECM motor and delivers air
flow similar to a PSC but operates as efficiently as a variable speed
ECM motor. Because it is an ECM motor, the 3-speed ECM can
ramp slowly up or down like the variable speed ECM motor. There
are 3 possible speed taps available on the 3-speed ECM motor with
#1 being the lowest airflow and #3 being the highest airflow. These
speed selections are preset at the time of manufacture and are easily
changed in the field if necessary.
All-Aluminum Air Coil
These air coils are constructed of lanced fin and rifled tube aluminum
that is not susceptible to formicary corrosion. For additional
condensate runoff and meeting project specifications, an optional
AlumiSeal e-coating is available.
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