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Multi-zone Heat Pump Condensing Units
EMI AMErIcA SErIES MultI-zonE HEAt PuMP condEnSIng unItS
• Compressor and Fan Motor Contactor
• Capacitor
• Low Voltage Connections
• Large Capacity Suction Accumulator (9,
12, & 18 Only)
• High Pressure Control (18 & 24 Only)
• Solid Core Filter Drier
• Thermostatically controlled crankcase
heater (9&12 Only)
• Common suction pressure access point
• Hard Start Capacitor
ITEMS FOR CONSIDERATION
• Locate the unit as close to the indoor sec-
tion as possible. Maximum length allowed
is 100 equivalent feet.
• Avoid high trafc areas and prevailing
wind locations.
• Surface must be level.
• Mount unit above typical snow levels.
Ensure free air flow through the unit. Air
must not recirculate from discharge to in-
take. Air is drawn through the coil with side
or top and discharged through the fan grille.
A minimum 48” clearance is necessary
for the condenser discharge. Intake
(coil side) clearance is 12” minimum.
Consider how power will be run to the unit
from the power source. Refrigerant piping
must be a direct line to the indoor unit.
Heat pump units produce condensate in the
heat pump mode. Water will drain from the
unit at the base. Place the unit so as not to
create a hazard for pedestrians.
SYSTEM OPTIONS
• Sea Coast Style Coated Coils /
Copper-Copper coils
• Wind Baffles - Louvers•
INSTALLER SUPPLIED ITEMS
• Power wiring
• Low Volt wiring - 18 AWG minimum
• Secure mounting pad or foundation
• Refrigerant piping
• Disconnect switch
SITE PREPARATION
Place the unit on a flat concrete surface or
pad if on the ground. Roof mounting should
use a build up platform. Piping is through
the wall or roof directly to the unit. In areas
of heavy snowfall, condensers should be
set above the level of maximum anticipated
snowfall (12” is usually adequate).
EMI offers the nest multi-zone heat pump
outdoor units in the ductless split market, the
S & T series (S2HB, T2HB, T3HB & T4HB)
Condensing Units. The S & T series (S2HB,
T2HB, T3HB & T4HB) allows the installation of
two or more circuits from a single outside location
when space or aesthetic requirements limit the
use of the number of cabinets outdoors. Each
zone is independent so no mixing of refrigerant
occurs.
When specifying heat pump(s), it is
recommended that the matching indoor unit(s)
be equipped with electric heat. All 9,000, and
12,000 Btuh circuit units are equipped with the
Duratec Performance Package which includes
a large capacity suction accumulator with
surge baffles and enhanced oil management,
and a factory installed solid core lter drier. All
18,000 and 24,000 Btuh circuit units include
a solid core lter drier and high pressure limit
switch. The 18,000 Btuh circuits also include a
large capacity suction accumulator with surge
baffles and enhanced oil management.
NOTE: The crankcase heater is installed
with 9,000 and 12,000 Btuh heat pumps.
CONTROLS AND COMPONENTS
(FACTORY INSTALLED OR SUPPLIED)
DESCRIPTION
Thermostatically controlled crankcase
heater – This feature energizes the crank-
case heater only when needed, removes
the heater from the electrical circuit at
conditions where it’s not required, saving
unnecessary Watts, and increasing overall
system efciency.