5547666-CTG-A-0718
Johnson Controls Unitary Products 99
UNIT OPERATION
DEFROST MODE
The defrost mode is equivalent to the cooling mode except that
the outdoor fan motor is de-energized.
COOLING OPERATION
During cooling operation, the control receives thermostat sig-
nals at the “Y1” and/or “Y2” and “O” input terminals. The control
communicates the proper compressor speed and OD fan speed
to the inverter drive, based on the control algorithm. The control
energizes the “RV” and “RVG” terminals with 24VAC to switch
the reversing valve.
HEATING OPERATION
During heating operation, the control receives thermostat sig-
nals at the “Y1” and/or “Y2” input terminals. The main control
communicates the proper compressor speed and OD fan speed
to the inverter drive, based on the control operation.
EMERGENCY HEAT
Emergency Heating mode is defined as a compressor speed
reference of zero and the backup heat source energized. In
other words, a 'W' signal present without any 'Y' signals pres-
ent. The control energizes 'W1 OUT' immediately when an
emergency heat signal “W” is received. The control energizes
“W2 OUT” 15 minutes after the “W1 OUT” output is energized.
During emergency heating mode, the control returns to standby
mode. The control passes the “W1 OUT” back to the ID unit
automatically if no “Y” is present. The reason is that “W” and
“W1 OUT” are connected via a normally closed relay contact.
MECHANICAL SPECIFICATIONS
MANUFACTURE AND CERTIFICATIONS
• Units shall be manufactured in an ISO 9001 certified facility.
• Units shall be certified by CSA to UL 1995 / CSA 22.2 and
performance certified to ANSI/AHRI Standard 210/240.
• Units shall be sound tested according to ANSI/AHRI Stan-
dard 270.
• Certified matched system ratings will be available for down-
load from the AHRI online directory at
www.ahridirectory.org.
• Unit packaging shall be marked, “Assembled in the USA”
UNIT APPLICATION
• Units shall be approved for heating operation between -20ºF
and 75ºF without modification.
• Units shall be approved for linesets up to 80 feet equivalent
length without modification.
• Units shall be approved for installation within 6 inches of a
flat vertical wall without modification, according to the
instructions in the technical literature.
• Units shall be certified to the 5th Edition (2014) of the Florida
Building Code for both Ground Mounted and Rooftop
Mounted applications up to 200 feet above grade with
approved mounting kit.
• Units shall be designed to 74dBA or less to minimize sound
pollution.
UNIT ACCESS
• Units shall have a removable fan guard that can be removed
independently of the top for interior access through the top of
the unit without damaging the coil.
• Units shall have two removable stamped extruded louver
steel coil guards for exterior coil access.
• Units shall have a separate compartment for electrical con-
trols that can be accessed without disturbing the unit airflow.
• Units shall have a blockoff panel that can be removed to pro-
vide interior unit access through the side of the unit.
• Units shall have a removable blockoff panel and a swing
away removable electrical panel that provides sufficient inte-
rior unit access for removing the compressor through the
side of the unit.
UNIT CONSTRUCTION
• Units shall be shipped completely wired, piped and assem-
bled. Wiring pigtails shall be provided for field control wiring
connections. Service valves shall be provided for field refrig-
erant line connections.
• Units shall be factory leak checked, run tested, and shipped
with a holding charge of R-410A refrigerant.
• Unit cabinet components shall be G90 equivalent steel fin-
ished with powder-coat paint rated at a minimum of 750
hours under ASTM B117 testing.
• Units shall have a single corner post opposite the electrical
control box and two independently removable steel coil
guard panels to optimize cabinet strength and serviceability.
• Units shall have L-shaped stamped extruded louver sheet
metal coil guards with for maximum panel durability and stiff-
ness.
• Units shall have a factory installed filter-drier for faster instal-
lation and improved system reliability.
• Unit base valves shall be mounted diagonally on the unit
base pan with service ports that provide sufficient clearance
for low-loss hose fittings.
• Units shall provide a service port mounted in the base pan
such that panels can be removed without moving the service
port.
• Units shall be constructed with a high pressure switch and a
low pressure switch for system protection.
• Units shall be constructed with all badging and labels applied
at the factory.
UNIT COMPONENTS
• Units shall be constructed of rotary or scroll compressors
paired with an inverter drive.
• Outdoor fan shall be direct drive with vertical air discharge
for low sound levels.
• Outdoor fan blades are designed to minimize sound.
(Applies to select models).
• Outdoor fan motor shall be ECM construction with perma-
nently lubricated ball bearing motors approved for vertical
shaft applications.
• Outdoor coil shall be air cooled and constructed of enhanced
aluminum fins mechanically bonded to internally enhanced Ø
7mm copper tubing.
UNIT WARRANTIES
• Unit manufacturer shall provide a 10-Year compressor war-
ranty without a requirement for unit registration.
• Unit manufacturer shall provide a 5-Year parts warranty with-
out a requirement for unit registration.
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