MODEL TMW SIZE 100

WATER SOURCE HEAT PUMP SPECIFICATIONS

Rev. April 02, 2007

General:

Furnish and install ClimateMaster Tranquility
Water Source Heat Pumps with EarthPure (HFC-410A) refrigerant, as indicated
on the plans. Equipment shall be completely assembled, piped and internally
wired. Capacities and characteristics as listed in the schedule and
the specifications that follow.

Water-to-Water
Heat Pumps

Units shall be supplied completely factory built for an entering source
water temperature range from 20° to 110°F (-6.7° to 43.3°C) and entering
(heating) load water temperature range from 60° to 120°F (15.6° to 48.9°C)
or entering (cooling) load water temperature range of  50° to 90°F
(10.0° to 32.2°C) as standard.  Equivalent units from other manufacturers
can be proposed provided approval to bid is given 10 days prior to bid
closing. All equipment listed in this section must be rated in accordance
with American Refrigeration Institute / International Standards Organization
(ARI / ISO) and Environmental Testing Laboratories for United States
and Canada (ETL-US-C).  The units shall have ARI / ISO and ETL-US-C
labels.  All units shall be fully quality tested by factory run
testing under normal operating conditions and water flow rates as described
herein. Quality control system shall automatically perform via computer:
triple leak check, pressure tests, evacuate and accurately charge system,
perform detailed heating and cooling mode tests, and quality cross check
all operational and test conditions to pass/fail data base.  Detailed
report card will ship with each unit displaying all test performance
data. Note:  If unit fails on any cross check, system shall not
be allowed unit to ship. Serial numbers will be recorded by factory
and furnished to contractor on report card for ease of unit warranty
status. Units tested without water flow are not acceptable.

Basic
Construction: 

All units must have a minimum of three access panels for serviceability
of compressor compartment. Units having only one access
panel to compressor shall not be acceptable.

The heat pumps shall
be fabricated from heavy gauge galvanized steel with powder coat paint
finish. Both sides of the steel shall be painted for added protection. 
All interior surfaces shall be lined with 1/2 inch (12.7mm) thick, dual
density, 1-3/4 lb/ft<sup>3 (28 kg/m<sup>3) acoustic type
glass fiber insulation.  Insulation placement shall be designed
in a manner that will eliminate any exposed edges.

Standard cabinet panel
insulation must meet NFPA 90A requirements, air erosion and mold growth
limits of UL-181, stringent fungal resistance test per ASTM-C1071 and
ASTM G21, and shall meet zero level bacteria growth per ASTM G22. Unit insulation must meet these stringent requirements or unit(s)
will not be accepted.

Cabinets shall have
separate holes and knockouts for entrance of line voltage and low voltage
control wiring. All factory-installed wiring passing through factory
knockouts and openings shall be protected from sheet metal edges at
openings by plastic ferrules. Supply and return water connections shall
be copper IPT fittings, terminating out the top of the unit, and shall
be staggered to allow headering of multiple units, side-by-side. Contractor
shall be responsible for any extra costs involved in the installation
of units that do not have this feature.  Contractor must ensure
that units can be easily removed for servicing and coordinate locations
of electrical conduit and lights with the electrical contractor.

Unit(s) shall have exterior
indicator lights showing, 1) compressor operation (on/off) and 2) unit
fault status.  Contractor shall be responsible for providing
control circuitry and indicator lights for units not providing this
feature.

Option:  UltraQuiet package shall consist of sound attenuating
blanket on both compressors to reduce radiated noise.

Option:  The
unit will be supplied with cupro nickel coaxial water to refrigerant
heat exchanger (specify source and/or load heat exchanger).

Refrigerant
Circuit: 

Units shall have two sealed, isolated refrigerant circuits, each including
a high efficiency scroll compressor designed for heat pump operation,
a thermostatic expansion valve for refrigerant metering, a reversing
valve, two sets of coaxial (tube in tube) refrigerant to water heat
exchangers, and safety controls including a high pressure switch, low
pressure switch (loss of charge), and low water temperature sensors. 
Access fittings shall be factory installed on high and low pressure
refrigerant lines to facilitate field service. Activation of any safety
device shall prevent compressor operation via a microprocessor lockout
circuit. Units with brazed plate heat exchangers will not
be accepted.

Unit shall be supplied
with extended range insulation, which adds closed cell insulation to
internal water lines, and provides insulation on suction side refrigeration
tubing including refrigerant to water heat exchangers.

Hermetic compressors
shall be internally sprung. The compressors shall have a dual level
vibration isolation system. The compressors will be mounted on rubber
grommets to a large heavy gauge compressor mounting tray plate, which
is then isolated from the cabinet base with rubber grommets for maximized
vibration attenuation.  Compressors shall have thermal overload
protection. 

Refrigerant to water
heat exchangers shall be of copper inner water tube and steel refrigerant
outer tube design, rated to withstand 625 PSIG (3101 kPa) working refrigerant
pressure and 450 PSIG (3101 kPa) working water pressure. 
The refrigerant to water heat exchanger shall be powder-coated for extra
corrosion protection.  Plate to plate heat exchangers
are not acceptable.

Refrigerant
metering shall be accomplished by thermostatic expansion valve only.
Expansion valves shall be dual port balanced types with external equalizer
for optimum refrigerant metering. Units shall be designed and tested
for operating ranges of entering water temperatures from 20° to 110°F 
(-6.7° to 43.3°C). Reversing valve shall be four-way solenoid activated
refrigerant valve, which shall default to heating mode should the solenoid
fail to function. 

Electrical: 

A control box shall be located within the unit compressor compartment
and shall contain a 75VA transformer, 24 volt activated, 3 pole compressor
contactor, terminal block for thermostat wiring and solid-state controller
for complete unit operation. Reversing valve wiring shall be routed
through this electronic controller. Units shall be name-plated for use
with time delay fuses or HACR circuit breakers. Unit controls shall
be 24 Volt and provide heating or cooling as required by the remote
aquastat / sensor.  Two compressor units shall have a solid-state
time delay relay and random start to prevent both compressors from starting
simultaneously.

Solid
State Control System (CXM): 

Units shall have a solid-state control system. Units utilizing electro-mechanical
control shall not be acceptable. The control system microprocessor
board shall be specifically designed to protect against building electrical
system noise contamination, EMI, and RFI interference. The control system
shall interface with a heat pump type thermostat. The control system
shall have the following features:

Anti-short cycle time delay on compressor operation.
Random start on power up mode.
Low voltage protection.
High voltage protection.
Unit shutdown on high or low refrigerant pressures.
Unit shutdown on low water temperature.
Option to reset uni