McQuay MicroTech 200 Series User Manual

OM 200MICRO 5
Features of the Control Panel
 Control of leaving chilled water within a
0.2°F (0.1°C) control band.
 Readout of all temperature and pressure
readings:
 entering and leaving chilled water
temperature
 enter and leaving condenser water
temperature
 saturated evaporator refrigerant
temperature and pressure
 saturated condenser temperature and
pressure - outside air temperature
(optional)
 suction line, liquid line and discharge
line temperatures - calculated
superheat for discharge and suction
lines
 oil sump temperature - oil feed
temperature and pressure
 optional condenser heat recovery
temperature
 Automatic control of primary and
**secondary evaporator and condenser
pumps.
 Control of up to 4 stages of cooling tower
fans plus modulating bypass valve.
 Panel mounted 12 key keypad plus 6 Quick
Access function keys. Operator can log
chiller operating conditions from a single
keypad/display instead of reading gauges,
thermometers, pots, etc. The display is a
backlit, 4 line by 40 character LCD type for
easy viewing in all lighting conditions.
 New auto-logging feature will automatically
log chiller functions at the time of peak load.
The controller will store and display up to six
weeks of accumulated data.
 Two levels of security protection against
unauthorized changing of set points and
other control parameters.
 Complete warning and fault diagnostics to
inform operators of warning and fault
conditions in plain language. Al1 warnings,
problems and faults are time and date
stamped so there is no guessing of when the
fault condition occurred. In addition, the
operating conditions that existed just prior to
shutdown can be recalled to aid in isolating
the cause of the problem.
 Eight previous faults and related operating
conditions are available from the display.
 Soft loading feature reduces electrical
consumption and peak demand charges
during loop pulldown.
 Adjustable load pull-down rate reduces
under-shoot during loop pulldown.
 Easy integration into building automation
systems via separate 4-20mAdc signals for
chilled water reset and demand limiting.
 Internal time-clock for on/off scheduling. The
time clock accommodates a 7 day schedule
plus holiday, 1 start and stop per day, and 14
holidays with programmable duration.
 Communications capabilities for remote
monitoring, changing of set points, trend
logging, remote reset, alarm and event
detection, via a compatible IBM-PC running
McOuay MicroTech software.
 Manual control mode allows the service
technician to command the unit to different
operating states. Useful for system checkout.
 BAS communication capability via McQuay's
Open Protocol strategy to over 10 major BAS
manufacturers.
 Service Test mode for troubleshooting
controller hardware.
 Display available in either U.S.Customary or
S.l. units. Keypad programmable alarm
contacts for normally open, or normally
closed, and optional pulse output on problem
and warning conditions.
 Pressure transducers for direct reading of
system pressures. Preemptive control of low
evaporator pressure conditions to take
corrective action prior to a fault trip.
 Preemptive control of high discharge
temperature.
 Modulating oil cooler valve control
(optional).
 Minimum vane position set point.
 **Secondary throughout this publication
implies a parallel or standby pump.

McQuay MicroTech 200 Series Specifications

General

Brand	McQuay
Model	MicroTech 200 Series
Category	Chiller
Language	English