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1. SAFETY CONSIDERATIONS
Installing, starting up, and servicing equipment can be
hazardous due to system pressures, electrical components
and equipment location (elevated structures, etc.). Only
trained and qualied installers as well as service technicians
should install, start-up and service this equipment.
When working on the equipment, observe precautions found
in the literature, on the tags, stickers, and labels attached to
the equipment.
Follow all safety codes. Wear safety glasses and work
gloves. Keep quenched cloths and re extinguisher nearby
when brazing. Use care in handling, rigging, and setting
bulky equipment. Units are factory pressurized with dry air at
approximately 40 psig. Be careful when opening the circuit.
If no pressure is present, check for leaks or loose valves.
Work in a well-ventilated location when using refrigerant.
WARNING! Before installation, always check to
make sure main power to systems is OFF.
Electrical shock can cause personal injury or
death.
2. INTRODUCTION
These instructions describe installation, start-up and service
of refrigeration duty, light-industrial evaporator units.
3. PRODUCT DESCRIPTION
EK,EM,EJ,LM,LJ and DJ series are ceiling-mounted
light-industrial walk-in evaporators. All series except the
LM series are AWEF registered. Each unit includes a wiring
diagram that meets the customer’s requirements. The wiring
diagram displays all the components with all the necessary
protections and controls.
EK,EM and EJ series are single-coil construction for an
air distribution towards the centre of the cooler and freezer.
The fans draw air from the evaporator coil and discharge it
through the fan guards at the front of the unit.
LM, LJ and DJ series are dual-coil construction. On the
LM and LJ series, fans draw air from below the unit and
discharge it through the evaporator coils on both sides
of the unit. On the DJ series, the fans draw air from the
evaporator coil and discharge it vertically through the fan
guards underneath the unit.
Coils are manufactured with seamless deoxidized heavy
wall smooth copper tubes and aluminum plate ns. For
a maximum heat transfer, the tubes are mechanically
expanded into self-spaced plate ns with full collar for a
permanent bond.
Connections and bends are brazed with high-temperature
brazing alloy. Coils are factory leak tested at 300 psig and
purged with a -40°F dew point dry air. Coils are ready for
HFC, HFO and CO2 refrigerants and are provided with sweat
type connections (several coating materials are available).
All units are modular design and use a minimum amount of
parts for easy part replacement and availability.
All controls, motors and heaters are factory wired to provide
a fully automatic operation of the unit.
Casing for all models is made from heavy-gauge stucco
aluminum. All units come with stainless steel or plated
hardware for a lightweight and rustproof assembly. Other
optional materials are available.
EM and EJ series are provided with removable
1 1/4” female pipe thread drain tting for easy installation
and cleaning when installed with a drain union. EK, LM, LJ
and DJ series are provided with removable 7/8” female pipe
thread drain ttings.
EK, EM and LM models are equipped with AC standard-
efciency fan motors. EJ, LJ and DJ models are equipped
with 500mm (20") high-efciency cast-aluminum industrial
fans. This exible, economical and environmentally friendly
fan system enables high air side pressures, ideal efciency
and quiet operation. Fans are designed with a polymer
aerodynamic ventury for maximum air-ow dynamics. Seven
sickle-shaped fan blades are made from cast aluminum for
good corrosion resistance, low weight, excellent airow
output and sound power reduction.
All units are provided with an insulated drain pan and
assembled with corrosion-free components.
All standard EKE, EME, EJE, LME, LJE and DJE models
are provided with a defrost termination switch, heater safety
thermostat and fan delay thermostat. All units feature incoloy
low watt density tubular heaters. They are embedded within
the coil for positive defrost and high-energy efciency. This
allows heat gain reduction in coolers and freezers. They are
available for 208-240/3/60, 480/3/60 and 575/3/60. 240/3/60
and 480/3/60 can be used on 200/3/50 and 380/3/50. All
units use proper number of heaters for an even phase
loading. Refer to the wiring diagrams (Section 13) for heater
arrangement.
EMG, EJG, LMG, LJG, DJG, EMH, EJH, LMH, LJH and
DJH models are provided with fan motor contactors, heater
contactors, drain pan heater safety, fan delay and defrost
termination thermostats. These thermostats sense the coil
temperature and control the operation of fans and heaters.
All units feature incoloy low watt density tubular heaters in
the drain pan.
EKT, EMT, EJT, LMT, LJT and DJT models are provided
with fan delay, defrost termination thermostat and hot gas
defrost pan grid.
