McQuay IM 660-3
1
Introduction
This manual provides information about the MicroTech 2000™
Water Source Heat Pump (WSHP) controller and control
system used in the McQuay International WSHP product lines.
The manual describes the controller’s components, input/output
configurations, and service procedures.
For network installation or commissioning instructions for
new projects, refer to the protocol information document ED
14954. For general information on a particular WSHP unit,
refer to the model-specific installation manual (see Table 1).
*50 Hz only
Table 1: Model-specific water source heat pump
installation literature
Document number
WSHP unit model
lM 407
Vertical WSHP (007 to 060)
lM 439
Large Vertical WSHP (070 to 290)
IM 447
Console Units WSHP
lM 494
WMH/CWH (007 to 019)
lM 526
Horizontal WSHP (007 to 120)
lM 544
CCH/HWH (006 to 060)*
lM 656
Horizontal WSHP (019 to 060)
IM 742
Enfinity Horizontal WSHP (007 to 060)
IM 778
Enfinity Vertical WSHP (007 to 060)
WARNING
Electric shock hazard.
Can cause equipment damage, personal injury, or death.
Properly ground equipment. Connections and service to the
MicroTech WSHP controller control panel must be performed
only by personnel knowledgeable in the operation of the
equipment being controlled.
WARNING
Moisture in the control panel can cause personal injury and
improper equipment operation.
When servicing this equipment during rainy weather or high
humidity conditions, protect the electrical components in the
main control panel.
CAUTION
Temperature hazard. Can cause damage to system
components.
The controller is designed to operate in ambient temperatures
from 32°F to 140°F (O°C to 60°C), and in relative humidity up to
95% (noncondensing). The controller can be stored in ambient
temperatures from 40°F to 176°F (40°C to 80°C), and in relative
humidity up to 95% (noncondensing).
CAUTION
Properly commission (page 6) the water source heat pump
before using for temporary heating or cooling. Failure to
properly commission can cause equipment damage not covered
by warranty.
CAUTION
Static sensitive components. Static discharge while
handling electronic circuit boards can cause damage to the
components.
Discharge any static electrical charge by touching the bare
metal inside the main control panel before performing any
service work. Never unplug cables, circuit board terminal blocks,
relay modules, or power plugs while power is applied to the
panel.
CAUTION
This equipment generates and uses radio frequency energy. If
not installed and used in accordance with this manual, it can
cause interference to radio communications. It has been tested
and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC rules. Operation is subject to the
following conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received, including
interference that may cause undesired operation.
These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in
a commercial environment. Operation of this equipment in a
residential area is likely to cause harmful interference, in which
case users are required to correct the interference at their own
expense. McQuay International disclaims any liability resulting
from any interference or for the correction thereof.
