hydron WT036 Instruction manual

Engineering Data and
Installation Manual
WT MODELS WATER-TO-WATER HEAT PUMPS & HYDRONIC AIR HANDLERS
REVISION: B
20D082-08NN
20D082-08NN

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WT Models, Rev.: B Enertech Global
Table of Contents:
Section 1: Model Nomenclature
Model Nomenclature................................................................................................................4 - 5
Section 2: Installation Introduction
Introduction, Pre-Installation, Components............................................................................6 - 7
Section 3: Installation Considerations
Installation Considerations.............................................................................................................8
Heating Mode Operation Considerations...................................................................................9
Buffer Tank Sizing and Usage.......................................................................................................10
Section 4: Installation
Unit and Air Handler Placement..................................................................................................11
Unit Dimensional Data...........................................................................................................12 - 14
(Water-to-Water Units, Hydronic Air Handlers/”A” Coils)
Section 5: Unit Piping Installation
Interior Piping, Water Quality.................................................................................................15 - 19
Section 6: Antifreeze
Overview..................................................................................................................................20 - 21
Anitfreeze Charging......................................................................................................................22
Section 7: Desuperheater Installation
Installation...............................................................................................................................23 - 25
Section 8: Controls
Controls....................................................................................................................................26 - 29
Hydronic Air Handler Airow Settings...........................................................................................30
Wiring Diagrams......................................................................................................................31 - 39
Section 9: Equipment Start-Up Procedures
Equipment Start-Up Checklist and Form..............................................................................40 - 41
Section 10: Troubleshooting
Troubleshooting Guide..........................................................................................................42 - 45
Superheat/Subcooling Conditions.......................................................................................46 - 47
Troubleshooting Form....................................................................................................................48
Section 11: Engineering Data
Unit and Air Handler Electrical Data....................................................................................49 - 50
Glossary & Flow Rate Calculations..............................................................................................51
AHRI Performance Data...............................................................................................................52
Extended Unit Performance Data........................................................................................53 - 64
Air Handler & “A” Coil Performance Data.................................................................................65
Section 17: Forms
Warranty Registration....................................................................................................................66
Warranty Claim Form.....................................................................................................................67

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Enertech Global WT Models, Rev.: B
Section 1: WT Water-To-Water Unit Model Nomenclature
Section 1: Air Handler Model Nomenclature

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WT Models, Rev.: B Enertech Global
H
H
Section 1: Cased”A” Coil Model Nomenclature
Section 1: Uncased ”A” Coil Model Nomenclature

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Enertech Global WT Models, Rev.: B
Section 2: Installation Introduction
INTRODUCTION
This geothermal heat pump provides heated
water and chilled water as well as optional
domestic water heating capability. Engineering
and quality control is built into every
geothermal unit. Good performance depends
on proper application and correct installation.
Notices, Cautions, Warnings, & Dangers:
“NOTICE” Notication of installation, operation
or maintenance information which is important,
but which is NOT hazard-related.
“CAUTION” Indicates a potentially hazardous
situation or an unsafe practice which, if not
avoided, COULD result in minor or moderate
injury or product or property damage.
“WARNING” Indicates potentially hazardous
situation which, if not avoided, COULD result in
death or serious injury.
“DANGER” Indicates an immediate hazardous
situation which, if not avoided, WILL result in
death or serious injury.
Inspection
Upon receipt of any geothermal equipment,
carefully check the shipment against the
packing slip and the freight company bill of
lading. Verify that all units and packages have
been received. Inspect the packaging of
each package and each unit for damages.
Insure that the carrier makes proper notation
of all damages or shortage on all bill of lading
papers. Concealed damage should be
reported to the freight company within 15 days.
If not led within 15 days the freight company
can deny all claims.
Note: Notify Enertech Global, LLC shipping
department of all damages within 15 days. It
is the responsibility of the purchaser to le all
necessary claims with the freight company.
Unit Protection
Protect units from damage and contamination
due to plastering (spraying), painting and
all other foreign materials that may be used
at the job site. Keep all units covered on the
job site with either the original packaging or
equivalent protective covering. Cap or recap
unit connections and all piping until unit is
installed. Precautions must be taken to avoid
physical damage and contamination which
may prevent proper start-up and may result in
costly equipment repair.
⚠ CAUTION ⚠
DO NOT OPERATE THE GEOTHERMAL
HEAT PUMP UNIT DURING BUILDING
CONSTRUCTION PHASE.
Storage
All geothermal units should be stored inside in
the original packaging in a clean, dry location.
Units should be stored in an upright position
at all times. Units should not be stacked unless
specially noted on the packaging.
Pre-Installation
Special care should be taken in locating the
geothermal unit. Installation location chosen
should include adequate service clearance
around the unit. All units should be placed on
a formed plastic air pad, or a high density,
closed cell polystyrene pad slightly larger than
the base of the unit. If units are being placed
on racking, the unit must be placed on a solid
foundation. All units should be located in an
indoor area where the ambient temperature
will remain above 55°F and should be located
in a way that piping and ductwork or other
permanently installed xtures do not have to be
removed for servicing and lter replacement.
Pre-Installation Steps:
1. Compare the electrical data on the unit
nameplate with packing slip and ordering
information to verify that the correct unit
has been shipped.
2. Inspect all electrical connections
and wires. Connections must be clean and
tight at the terminals, and wires should not
touch any sharp edges or copper pipe.
3. Verify that all refrigerant tubing is free of
dents and kinks. Refrigerant tubing should
not be touching other unit components.

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WT Models, Rev.: B Enertech Global
4. Before unit start-up, read all manuals and
become familiar with unit components
and operation. Thoroughly check the unit
before operating.
5. For A-Coil installations, it is recommended
that coil be sprayed with liquid detergent
thoroughly and rinsed thoroughly before
installation to assure proper drainage of
condensate from the coil ns to eliminate
water blowoff and to assure maximum coil
performance. If not sprayed approximately
50 hours of break in time is required to
achieve the same results.
⚠ CAUTION ⚠
ALL GEOTHERMAL EQUIPMENT IS
DESIGNED FOR INDOOR INSTALLATION
ONLY. DO NOT INSTALL OR STORE UNIT
IN A CORROSIVE ENVIRONMENT OR IN
A LOCATION WHERE TEMPERATURE AND
HUMIDITY ARE SUBJECT TO EXTREMES.
EQUIPMENT IS NOT CERTIFIED FOR
OUTDOOR APPLICATIONS. SUCH
INSTALLATION WILL VOID
ALL WARRANTIES.
⚠ WARNING ⚠
FAILURE TO FOLLOW THIS CAUTION MAY
RESULT IN PERSONAL INJURY. USE CARE
AND WEAR APPROPRIATE PROTECTIVE
CLOTHING, SAFETY GLASSES AND
PROTECTIVE GLOVES WHEN SERVICING
UNIT AND HANDLING PARTS.
⚠ CAUTION ⚠
BEFORE DRILLING OR DRIVING ANY
SCREWS INTO CABINET, CHECK TO BE
SURE THE SCREW WILL NOT HIT ANY
INTERNAL PARTS OR REFRIGERANT LINES.
Section 2: Installation Introduction
Components
Master Contactor: Energizes Compressor
and optional Hydronic Pump and/or
Desuperheater pump package.
Logic Board: Logic Board operates the
compressor and protects unit by locking out
when safety switches are engaged. It also
provides fault indicator(s).
Terminal Strip: Provides connection to the
thermostat or other accessories to the low
voltage circuit.
Transformer: Converts incoming (source)
voltage to 24V AC.
Low Voltage Breaker: Attached directly to
transformer, protects the transformer and low
voltage circuit.
Reversing Valve: Controls the cycle of the
refrigerant system (heating or cooling).
Energized in cooling mode.
High Pressure Switch: Protects the refrigerant
system from high refrigerant pressure, by locking
unit out if pressure exceeds setting.
Low Pressure Switch: Protects the refrigerant
system from low suction pressure, if suction
pressure falls below setting.
Flow Switch (Freeze Protection Device):
Protects the water heat exchanger from
freezing, by shutting down compressor if water
ow decreases.
Compressor (Copeland Scroll): Pumps
refrigerant through the heat exchangers and
pressurizes the refrigerant, which increases the
temperature of the refrigerant.
Shipping Bolts: This unit is equipped with the
new COMPRESSOR ISOLATION feature. Do not
loosen or remove the bolts.

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Enertech Global WT Models, Rev.: B
Consumer Instructions: Dealer should
instruct the consumer in proper operation,
maintenance, lter replacements, thermostat
and indicator lights. Also provide the consumer
with the manufacturer’s Owner's Manual for the
equipment being installed.
Enertech Global D-I-Y Policy: Enertech Global’s
geothermal heat pumps and system installations
may include electrical, refrigerant and/or water
connections. Federal, state and local codes
and regulations apply to various aspects of the
installation. Improperly installed equipment can
lead to equipment failure and health/safety
concerns. For these reasons, only qualied
technicians should install a Enertech Global built
geothermal system.
Because of the importance of proper
installation, Enertech Global does not sell
equipment direct to homeowners. Internet
websites and HVAC outlets may allow for
purchases directly by homeowners and do-
it-yourselfers, but Enertech Global offers no
warranty on equipment that is purchased via
the internet or installed by persons without
proper training.
Enertech Global has set forth this policy
to ensure installations of Enertech Global
geothermal systems are done safely and
properly. The use of well-trained, qualied
technicians helps ensure that your system
provides many years of comfort and savings.
Equipment Installation: Special care should
be taken in locating the unit. All units should
be placed on a formed plastic air pad, or
a high density, closed cell polystyrene pad
slightly larger than the base of the unit. All units
should be located in an indoor area were
the ambient temperature will remain above
55°F and should be located in a way that
piping and ductwork or other permanently
installed xtures do not have to be removed for
servicing and lter replacement.
Electrical: All wiring, line and low voltage,
should comply with the manufacturer's
recommendations, The National Electrical
Code, and all local codes and ordinances.
Thermostat: Thermostats should be installed
approximately 54 inches off the oor on an
inside wall in the return air pattern and where
they are not in direct sunlight at anytime.
Loop Pumping Modules: Must be wired to the
heat pump’s electric control box. A special
entrance knockout is provided below the
thermostat entrance knockout. A pump
module connection block, connected to
the master contactor, and circuit breaker is
provided to connect the Pump Module wiring.
Desuperheater Package: Water heating is
standard on all residential units (units may be
ordered without). It uses excess heat during
both heating and cooling cycles, to provide
hot water for domestic needs. A double wall
desuperheater exchanger (coil) located
between the compressor and the reversing
valve, extracts superheated vapor to heat
domestic water; still satisfying its heating and
cooling needs. The water circulation pump
comes pre-mounted in all residential units, but
must be electrically connected to the master
contactor. Leaving it disconnected ensures that
the pump will not run without a water supply.
The Desuperheater package can make up to
60% (depending on heat pump usage) of most
domestic water needs, but a water heater is still
recommended.
Desuperheater Piping: All copper tubes
& ttings should be 5/8” O.D (1/2” nom)
minimum with a maximum of 50ft separation.
Piping should be insulated with 3/8” wall
closed cell insulation.
Note: Copper is the only approved material
for piping the desuperheater.
Section 3: Installation Considerations

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WT Models, Rev.: B Enertech Global
Because the water-to-water machines have become so popular for providing heated water for
a multitude of uses, we’ve provided the above chart for reference.
The obvious correlation is that the warmer the Source Entering Water Temperature, the hotter
the Load Leaving Water Temperature can be, to a point. R410A can only handle up to about
125°F Load Leaving Water Temperature before putting the compressor at risk.
Actual usage, and choices of heat distribution devices need to follow the acceptable
operating conditions presented in the chart. If a question arises, please consult the Technical
Services Department.
Guidelines For Heating Mode Operation For Water-To-Water Units Using Scroll Compressors
•
•
•
•
•
• • • • • • •
Acceptable Operating Conditions
45°F
40°F
35°F
30°F
25°F20°F
15°F10°F
100°F
110°F
115°F
120°F
125°F
130°F
SCROLL COMPRESSOR OPERATING CONDITIONS (WATER TO WATER)
HEATING MODE OPERATION
Source Entering Water Temperature
• • • • •
70°F
65°F
60°F
55°F
50°F
FAILURE ZONE
Acceptable Operating Conditions
Outside Safe Operating Range
Outside Safe Operating Range
•
••
•
75°F
•
80°F
FAILURE ZONE
Load Leaving Water Temperature
Safety
Factor
Safety
Factor
Section 3: Operation Considerations
Enertech recommends the aquastat setting not be set above 110°F for the storage tank
temperature. Excessive vibration and part failure can occur at higher than recommended
temperature settings. The higher operating temperatures cause substantial efciency and
capacity reductions.
The performance is negatively affected as the unit operates at the higher water temperatures
and it benets the unit and the homeowner to operate at or below the recommended water
temperature of 110°F.
With the lower efciency created by higher water temperatures, the output capacity of the
unit is decreased along with the efciency. When operating at the higher entering water
temperature the heat of extraction is signicantly reduced, as well. In order to maintain the
needed capacity, more of the heat is coming from the compressor working harder to compress
the refrigerant.
The illustration below shows the parameters which are safe for compressor operation. Based
on the leaving load water of 120°F, the loop would have to maintain 35°F to operate within
the acceptable operating conditions for the compressor. Once your loop temperatures drop
below 35°F, the acceptable leaving load temperature drops below 120°F. If you are designing
loops for 30°F, the recommended leaving load temperature is 110°F.

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Enertech Global WT Models, Rev.: B
BUFFER TANKS
Virtually all water-to-water heat pumps used
for hydronic applications require a buffer tank
to prevent equipment short cycling, and to
allow lower ow rates through the water-to-
water unit than through the hydronic delivery
system. The following are considerations for
buffer tank sizing.
• The size of the buffer tank should be
determined based upon the predominant
use of the water-to-water equipment
(heating or cooling).
• The size of the buffer tank is based upon the
lowest operating stage of the equipment.
For example, a water-to-water heat
pump with a two-stage compressor or two
compressors may be sized for rst stage
capacity, reducing the size of the tank (two-
stage aquastat required).
• Pressurized buffer tanks are sized differently
than non-pressurized tanks (see guidelines
listed below).
Pressurized buffer tanks for predominately
heating applications should be sized at one (1)
U.S. gallon per 1,000 Btuh of heating capacity
(10 gallons per ton may also be used) at the
maximum entering source water temperature
(EST) and the minimum entering load water
temperature (ELT), the point at which the water-
to-water unit has the highest heating capacity,
usually 50-70°F EST and 80-90°F ELT.
For predominately cooling applications,
pressurized buffer tanks should be sized at
one (1) U.S. gallon per 1,000 Btuh of cooling
capacity (10 U.S. gallons per ton may also be
used) at the minimum EST and the maximum
ELT, the point at which the water-to-water unit
has the highest cooling capacity, usually 50-
70°F EST and 50-60°F ELT.
Select the size of the tank based upon the
larger of the calculations (heating or cooling).
Non-pressurized buffer tanks must also be sized
based upon predominate use (heating or
cooling) and based upon the lowest capacity
stage. Requirements for storage are less
according to the manufacturer of the HSS series
non-pressurized buffer tank. Using the same
conditions for maximum heating and cooling
capacity mentioned above, non-pressurized
buffer tanks require 6 U.S. gallons per ton.
Section 3: Buffer Tanks