ECR R40C Installation, Operation & Maintenance Manual - page 10
Product Description
• Available in straight cooling (PTAC).
• Use R-410A refrigerant.
• Include high-efficiency rotary compressors, protected
by a 5-year warranty.
• Include enhanced high-efficiency heat exchangers.
• Offer two fan speeds.
• Incorporate positive condensate re-evaporation to
improve efficiency.
• Have optional motorized fresh-air feature with positive
pressure seal.
• PTACunits are available in nominal sizes of 9,000 Btuh,
(2.6kW) 12,000 Btuh (3.5kW) or 15,000 Btuh (4.4kW)
18,000 Btuh (5.3kW).
• Energy Efficiency Rating (EER) as high as 9.
Standard Controls And Components
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Construction
• 20-gauge galvanized steel construction of chassis.
• Condenser baffle options to accommodate extended
wall sleeve applications.
• Powder-coated condenser and evaporator drain pan.
• Foam strip seal for supply air duct.
• Weather strip insulation.
–
Air Systems
• Thermally-protected PSC type motors.
• Air-stream surfaces insulated with 1/4" fiber-glass or
1/8" (3.2 mm) Volara™.
• Forward-curved type indoor fan, directly mounted to
motor shaft.
• Unit mount controls include field selection switch
to control indoor fan by cycling with compressor
operation or continuously with the unit.
–
Condensate Removal
• Outdoor fan incorporates condensate slinger ring.
Condensate is thrown onto coil, where it evaporates,
improving system performance.
• Thermostatic drain pan valve for condensate
elimination when outdoor temperature drops below
60°F (15°C), heat pump units only.
–
Controls
• Unit-mounted operating controls include thermostat,
fan speed control, heat/cool switch, fan cycle switch,
fresh air switch, if equipped.
• Ability to utilize 1-stage or 2-stage thermostat. 2
stage thermostat is capable of activating emergency
heat if auxiliary heat source is available.
• Low ambient protection — see "Microprocessor
control board" for details.
• Ability to control normally-open or normally-closed
motor valve switch, available on hydronic heat units
only. Order valve controls for 24V or line voltage.
• All hydronic heat units include molex plugs for
connection of hydronic valve motor.
• Remote mount controls include fan speed control and
fresh air switch, if equipped.
• All units are equipped with manual reset high
pressure switch which prevents abnormal high
pressure operation, increasing compressor reliability.
–
Microprocessor Control Board
• Universal control board is used in straight cooling,
electric resistance heat, hydronic heat, or cooling/
heat pump applications.
• Random start timer prevents multiple units from
simultaneous startups after power interruption or on
initial power-up.
• Fan purge — fan remains on for 60 seconds after
heat/cool is satisfied.
• Anti-short-cycle compressor protection prevents the
compressor from rapid cycling, increases compressor
reliability.
• Freeze-protection prevents evaporator coil freeze up,
improving compressor reliability.
• Low ambient lockout prevents compressor operation
in outdoor temperatures less than 40°F (4.4°C).
PTHP units supplied with unit-mounted control,
Control causes automatic changeover to auxiliary
heat, if installed.
• Test operation — all timers are temporarily
suppressed to allow ease of testing or
troubleshooting.
• Control board LED provides self-diagnostic
troubleshooting codes, see "Sequence of operation."
Field-Installed Accessories
• Hydronic heat — coil assembly is shipped loose for
field installation.
• Remote wall thermostat — digital 1-stage or 2-stage
available.
• Wall sleeves, louvers, and cabinets
• Aquastat - delays fan start-up until coil reaches
100°F (38°C) to eliminate "cold" blow condition.
• Hydronic control valve , Water 2 way & 3 way
• Hydronic control valve, Steam 2 way
• Hydronic Isolation valve, 1/2 in Sweat Connection.
GENERAL PRODUCT INFORMATION
Indoor Coil Freeze Protection (Standard)
Prevents indoor coil from freeze up in cooling mode.
• Indoor coil freeze up can occur due to a dirty air filter,
restricted or poor air flow, low refrigerant charge or low
room or outdoor temperatures.
• This can cause compressor damage.
• Should freeze condition be detected, compressor and
outdoor fan switch off for minimum of three minutes
until freeze condition is satisfied.
• During this time the indoor fan continues to run to aid
in defrost process.
The Right Fit for Comfort
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P/N 240010598, Rev. A [05/12/2014
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