Emerson XEV EX48 Instruction Sheet

Instruction Sheet
PA-00369
January 2014
XEV EX48 Superheat Controller
XEV EX48 Driver for Emerson EX4,5,6,7,8 Electronic
Stepper Expansion Valves (-40°F to 55°F SST)
Installation and Operations Manual
1.1. General Warning
Please read the following safety precautions and warnings
before using this manual:
CAUTION!
• This manual is part of the product and should be kept
near the controller for easy and quick reference.
• The controller should not be used for purposes different
from those described in this manual. It can not be used
as a safety device.
• Check the application limits before proceeding.
SAFETY PRECAUTIONS AND WARNINGS!
• Check that the supply voltage is correct before
connecting the controller.
• Do not expose to water or moisture: use the controller
only within the operating limits and avoid sudden
temperature changes with high humidity to prevent
condensation from forming.
• Warning! Disconnect all electrical connections before
performing any kind of maintenance.
• Mount the probe where it is not accessible by the end
user. The controller must not be opened. In case of
failure or faulty operation, send the controller back to
Emerson Climate Technologies with a detailed
description of the fault. Verify the maximum current that
can be applied to each relay (see Section 15,
Specifications).
www.emersonclimate.com/flowcontrols
11911 Adie Road P.O. Box 411400 St. Louis MO 63141 USA
XEV EX48 Superheat Controller
with ModBus Communication Capability
Ensure that the wires for probes, loads, and the power
supply are separated and far enough from each other,
without crossing or intertwining.
• In case of applications in industrial environments,
the use of main filters (our mod. FT1) in parallel with
inductive loads could be useful.
2.1. General Description
The XEV EX48 superheat controllers are factory
pre-programmed to drive the Emerson EX4,5,6,7,8*
electronic stepper expansion valves. The controller
regulates evaporator superheat (SH) to optimize
performance independent of climate or load conditions.
The XEV EX48 controllers have also been pre-set to
operate with the Emerson PT5, (4 to 20mA) pressure
transducer and the ECN-N60, NTC temperature probe.
The LAN connection transmits the pressure signal to the
other XEVs; this allows the use of only one pressure
transducer in multiplexed cabinet applications. The
controller can also have two (2) configurable digital inputs,
the first one is "dry contact" d1S and the other one is at
"high voltage" d2S to simplify connections with cooling
demand signal. With the integrated display, it is possible
to see the superheat (SH) value, the Percentage valve
opening, or the probe values; the local keyboard
enables the controller to be programmed without any
other devices. An RS485 serial link connects the
controller to other Emerson monitoring and supervising
systems, such as the Einstein "E2" with software version
2.84 and above or Xweb. * If EX7 or EX8 Valves are
used, change the "tEP" Code in Pr2 parameter setting
(see p.8)
2.2 Ordering Code for Individual Controllers
Emerson PCN Description
900001 XEV EX48
CUSTOMER SERVICE (314) 569-4666
Refrigerant
R404A,507,407A,
22,134a, R410A,CO2 Sub
Controllers Only
• XEV EX48 controller
• XEV electrical connectors