Enertech XT024, XT048, XT036, XT060 Installation & Operation Manual

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Installation & Operations Manual

XT MODELS PACKAGED WATER-TO-AIR MULTI-POSITIONAL HEAT PUMPS

20D218-03NN

Revision, A

Table of Contents

Section 1: Model Nomenclature and AHRI Data

Model Nomenclature Decoder .................................................................................................................................. 4

AHRI Performance Data .............................................................................................................................................. 4

Section 2: Installation Introduction

Introduction ...................................................................................................................................................................5

Pre-Installation...............................................................................................................................................................6

Components ................................................................................................................................................................. 6

Section 3: Installation Considerations

Unit Placement ............................................................................................................................................................. 8

Duct Work ...................................................................................................................................................................... 8

Section 4: Unit Installation

Typical Supply and Return Ductwork Connections .................................................................................................. 9

Dimensional Data ....................................................................................................................................................... 10

ECM Fan Performance - Two-Stage Compressor Units .......................................................................................... 11

Dehumidication Mode Options .............................................................................................................................. 11

Unit Physical Data ....................................................................................................................................................... 12

Unit Electrical Data: .................................................................................................................................................... 12

Unit Return Air Conversion ......................................................................................................................................... 13

To convert the unit to right hand return air: ............................................................................................................. 13

To convert the unit to downow supply air: ............................................................................................................. 13

Section 5: Unit Piping Installation

Water Quality .............................................................................................................................................................. 14

Water Quality Guidelines ........................................................................................................................................... 14

Interior Piping .............................................................................................................................................................. 15

Typical Pressurized Flow Center Installation ............................................................................................................. 15

Typical Non-Pressurized Flow Center Installation .................................................................................................... 16

Pressurized Flow Center and Pump Mounting ......................................................................................................... 17

Condensation Drain Connection ............................................................................................................................. 18

Flushing & Charging a Pressurized Flow Center ...................................................................................................... 19

Flush Cart Design ........................................................................................................................................................ 19

Typical Non-Pressurized Flow Center Installation .................................................................................................... 21

Flushing the Interior Piping (Non-Pressurized) ........................................................................................................... 22

Antifreeze Overview .................................................................................................................................................. 22

Antifreeze Characteristics ......................................................................................................................................... 22

Antifreeze Charging ................................................................................................................................................... 23

APSMA Pump Sharing Module .................................................................................................................................. 25

Open Loop Piping and Connections ....................................................................................................................... 26

Open Loop Single Stage Solenoid Connections ..................................................................................................... 27

Open Loop Two-Stage Solenoid Connections ........................................................................................................ 27

Section 6: Desuperheater Installation

Desuperheater Installation ........................................................................................................................................ 28

Plumbing Installation .................................................................................................................................................. 28

Typical Desuperheater Installation with Single Water Heater ................................................................................ 30

Desuperheater Installation with Preheat Tank ......................................................................................................... 30

Section 7: Auxiliary Heater Installation

Auxiliary Heater Nomenclature Decoder ................................................................................................................ 31

Introduction .................................................................................................................................................................32

Heater Compatibility .................................................................................................................................................. 32

Heater Installation ...................................................................................................................................................... 33

Heater Installation ...................................................................................................................................................... 34

Heater Electrical Data ............................................................................................................................................... 35

Section 8: Electrical Connections

High Voltage Single Phase Control Box Connections ............................................................................................. 36

High Voltage Three Phase Control Box Connections ............................................................................................. 36

Auxiliary Heater High Voltage Wiring Entry Locations ............................................................................................. 36

Section 9: Controls

Microprocessor Features and Operation ................................................................................................................ 37

Safety Controls ........................................................................................................................................................... 38

Lockout with Emergency Heat ................................................................................................................................. 39

Lockout Board LED Identication .............................................................................................................................. 39

Sequence of Operation ............................................................................................................................................ 40

Section 10: Wiring Diagrams

Two Stage, ECM, Single Phase, 208/230V, 60HZ ...................................................................................................... 41

Two Stage, ECM, Three Phase, 208/230V, 60HZ ....................................................................................................... 42

Two Stage, ECM, Single Phase, 460V, 60HZ .............................................................................................................. 43

Section 11: Equipment Start-Up Procedures

Equipment Start-Up Process ...................................................................................................................................... 44

Equipment Start-Up Form........................................................................................................................................... 45

Performance Check .................................................................................................................................................. 46

Section 12: Troubleshooting

QR Code Troubleshooting and Installation Videos ................................................................................................ 47

Compressor Troubleshooting Tips .............................................................................................................................. 48

Troubleshooting Tips ................................................................................................................................................... 49

Troubleshooting Tips ................................................................................................................................................... 50

Refrigeration Troubleshooting Form .......................................................................................................................... 51

Proper Power Supply Evaluation .............................................................................................................................. 52

Section 13: Warranty Forms

Warranty Registration ................................................................................................................................................. 53

Warranty Order & Claim ............................................................................................................................................54

Section 1: Model Nomenclature and AHRI Data

Btu/hr COP Btu/hr EER

Full Load 19,800 4.3 27,200 20.3

Part Load 16,600 4.8 21,400 29.1

Full Load 29,200 4.2 38,900 18.3

Part Load 23,200 4.6 29,900 27.0

Full Load 38,200 3.9 49,000 17.1

Part Load 29,700 4.3 37,400 24.1

Full Load 47,700 3.7 63,000 17.8

Part Load 38,600 4.3 49,000 24.9

Full Load 55,900 3.6 71,100 17.1

Part Load 46,700 4.1 57,500 23.0

XT072

MODEL CAPACITY

HEATING

COOLING

XT024

XT036

XT048

XT060

Btu/hr COP Btu/hr EER

FullLoad 24,600 5.3 29,600 26.9

PartLoad 18,200 5.5 22,400 34.0

FullLoad 35,700 4.9 40,900 23.4

PartLoad 24,800 5.3 30,400 32.8

FullLoad 47,700 4.5 53,600 22.5

PartLoad 34,000 4.9 39,800 29.6

FullLoad 60,000 4.5 67,700 22.4

PartLoad 43,300 4.8 50,800 29.8

FullLoad 70,300 4.3 75,600 21.1

PartLoad 52,800 4.6 59,200 26.9

XT072

MODEL

CAPACITY

HEATING

COOLING

XT024

XT036

XT048

XT060

Model Nomenclature Decoder

AHRI Performance Data

Ground Loop Heat Pump

Note: Rated in accordance with ISO Standard 13256-1 which includes Pump Penalties.

Heating capacities based on 68.0°F DB, 59.0°F WB entering air temperature. Cooling capacities based on 80.6°F DB, 66.2°F WB entering air temperature. Entering water temperatures Full Load: 32°F heating / 77°F cooling. Entering water temperatures Part Load: 41°F heating / 68°F cooling.

Enertech Global IOM, XT Models

Ground Water Heat Pump

Note: Rated in accordance with ISO Standard 13256-1 which includes Pump Penalties. Heating capacities based on 68.0°F DB, 59.0°F WB entering air temperature. Cooling capacities based on 80.6°F DB, 66.2°F WB entering air temperature. Entering water temperatures: 50°F heating / 59°F cooling.

Section 2: Installation Introduction

Introduction

This geothermal heat pump provides heating and cooling 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’s shipping department of all damages within 15 days. It is the responsibility

of the purchaser to le all necessary claims with the

freight company.

Un-packaging

Enertech units are mounted to wooden pallets for easy handling during shipment and installation. Units are protected during shipment with durable cardboard corner posts, top and air coil panels. Shrink wrap is applied covering the entire unit and attachment to the pallet. Upon receipt of the unit carefully remove the shrink wrap. Using a box cutter slit the shrink wrap on the cardboard top and corner posts. Use caution

to not damaged the nished surface of the unit.

Keep all cardboard or other packaging material

for safe storage and transport to the job site prior to

installation. Remove the front compressor section service panel to locate technical documents; manuals, bulletins or instructions and accessory items; HWG piping kits,

supply/return duct ange kits or condensate tubing

kits prior to installation.

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.

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.

IOM, XT Models Enertech Global

Removal and Disposal

Geothermal units removed from service should have all components, oils, antifreeze and refrigerants properly disposed of according to all local and national environmental recycling codes, regulations, standards and rules.

Section 2: Installation Introduction

Pre-Installation

Special care should be taken in locating the geothermal unit. Installation location chosen should include adequate service clearance around the unit. All vertical units should be placed on a formed plastic air pad, or a high density, closed cell polystyrene pad the unit. Flex connectors should also be installed in between the ductwork and the unit. 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.

slightly larger than the base of

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. Remove any packaging used to support or hold the blower during shipping. Remove and discard the blower motor armature shaft shipping bracket from the rear of the blower.

3. 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.

4. Verify that all refrigerant tubing is free of dents and kinks. Refrigerant tubing should not be touching other unit components.

5. Before unit start-up, read all manuals and become familiar with unit components and operation. Thoroughly check the unit before operating.

6. Determine discharge and return air patterns prior to unit assembly and installation.

Components

Master Contactor: Energizes Compressor and optional Hydronic Pump and/or Desuperheater 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.

Electric Heater: Provides auxiliary heat during cold temperatures and provides electric backup if unit malfunctions.

Enertech Global IOM, XT Models

Blower Motor (ECM): ECM (Electronically Commtated Motor) for variable fan speeds. Compressor (Copeland Scroll): Pumps refrigerant through the heat exchangers and pressurizes the refrigerant, which increases the temperature of the refrigerant.

Section 3: Installation Considerations

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 doit-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.

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; while 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 unconnected ensures

that the pump is 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.

Equipment Installation: Special care should be taken in locating the unit. All vertical units should be placed on a vibration absorbing pad (air pad)

slightly larger than the base of the unit. Downow

units should be placed on a non-combustible base. Flex connectors should also be installed in between the ductwork and 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.

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 desuperheater piping.

UV Light Usage:

air plenum should be such that the light does not have a direct line of sight to the air coil of the unit. UV lights could cause internal wiring, foam insulation, or other components to deteriorate. It would be better to place the UV light in the supply air plenum, or ductwork. This also helps keep the light cleaner.

Additionally, if a humidier is installed and in line of the sight of the UV light, consult the humidier

install manual for indication of whether the light will

deteriorate any parts of the humidier (like the pad).

The use of a UV light in the unit return

IOM, XT Models Enertech Global

Section 3: Installation Considerations

Unit Placement

When installing a geothermal heating and cooling unit, there are several items the installer should consider before placing the equipment.

1. Service Access. Is there enough space for service access? A general rule of thumb is at least 2 feet in the front and 2 feet on at least one side.

2. Unit Air Pad. All vertical geothermal heating and cooling equipment should be placed on either a formed plastic air pad, or a high density,

closed cell polystyrene pad. Downow units

should be placed on a non-combustible base. This helps eliminate vibration noise that could be

transmitted through the oor.

3. The installer has veried that all applicable wiring, ductwork, piping, and accessories are

correct and on the job site.

Duct Work

All new ductwork shall be designed as outlined in Sheet Metal and Air Conditioning Contractors National Association (SMACNA) or Air Conditioning Contractors of America (ACCA) or American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) handbooks.

All supply/return plenums should be isolated

from the unit by a exible connector (canvas) or

equivalent to prevent transfer of vibration noise

to the ductwork. The ex connector should be designed so as not to restrict airow. Turning vanes should be used on any transition with airow over

500 CFM. If the unit is installed in a unconditioned space, the metal ductwork should be insulated

on the inside with berglass insulation or similar

insulation to prevent heat loss/gain and to absorb air noise. If the unit is being installed with existing ductwork, the ductwork must be designed to handle the air volume required by the unit being installed. When running a cooling or heating load on a building, size ductwork accordingly to the building design load and heat pump CFM.

Industry Standard: When sizing ductwork use 400 CFM per Ton.

As a general rule, maximum recommended face velocity for a supply outlet used in a residential application is 750 FPM. Maximum recommended return grille velocity is 600 FPM. Systems with higher velocity, are likely to have noise problems.

In buildings where ceilings are 8 feet or more, at least 50 percent of the return air should be taken back to the heat pump from the ceiling or high sidewall location and not more than 50 percent

from the oor or low sidewall location.

Table 1: Maximum Air Velocities

Location Supply Return

Main Ducts 900 FPM 600 FPM

Branch Ducts 700 FPM 600 FPM

Grills, Registers, Diffusers 750 FPM 600 FPM

Enertech Global IOM, XT Models

Section 4: Unit Installation

Typical Supply and Return Ductwork Connections

Return and Supply Air Duct System

Return Air

Flex Connector

Maintain supply ange duct size for 12” minimum vertical height

Supply Air

Flex Connector

Pre-Installation Checklist

Before you fully install the geothermal equipment, it is recommended you go through this quick checklist before placing the equipment.

⧠ Fully inspect the unit after unpacking. ⧠ Open both the air handler section and

compressor section and remove any packaging material or documentation included in the unit.

⧠ Maintain the installation instructions included

with any kits for installation during unit assembly.

⧠ Remove and discard any blower housing

supports and the motor armature shaft shipping bracket from the rear of the blower.

⧠

Procedures and Forms from this manual and have it available as the unit installation proceeds.

⧠

solution to remove any oil or dirt.

Locate and review the Equipment Start-Up

Clean the air coil with soap and water

Equipment Pad

2” Polyethylene Foam

Note: These geothermal unit comes with an ECM Motor. For maximum performance, the blower speed should be set to maintain between 350 and 450 CFM/ton. Use DIP switch for ECM motor

adjustments.

⚠ WARNING ⚠

DOWNFLOW UNITS REQUIRE THAT THE FLOOR

OPENING (BETWEEN THE UNIT AND THE SUPPLY

DUCT PLENUM) BE SLEEVED THROUGH THE FLOOR

WITH METAL DUCT. THIS IS ESPECIALLY IMPORTANT

IF THE UNIT IS SITTING ON A PAD.

⚠ NOTICE ⚠

THE BLOWER SUPPORT BRACKET, LOCATED ON THE

BACK OF THE BLOWER FOR SHIPPING PURPOSES,

MUST BE REMOVED BEFORE OPERATION. FAILURE

TO REMOVE THE BRACKET COULD RESULT IN

POTENTIALLY NOISY OPERATION AND EQUIPMENT

DAMAGE.

IOM, XT Models Enertech Global

Section 4: Unit Installation

Dimensional Data

5.50

1.13

.97

Power Supply 1/2”

High Voltage Supply 1”

27.63

.89

CAP

Condensate

3/4” FPT

Desuperheater Out

Desuperheater In

Source Out

Source In

Filter

Rack

Air Coil

ASP ASP

Left View

Control Panel Plug Plate

Condensate 3/4” FPT

Low Votage 1/2”

Plenum Flanges

Access Panels

16.00

8.12

LEGEND:

SAP= Service Access Panel BSP

= Blower Service Panel

CSP

= Compressor Service Panel

CAP

= Control Access Panel = Access Service Panel

ASP FPT

= Female Pipe Thread

30.33

28.01

Control Box

Top View

Top Discharge

BSP

CSP

Front & Back View

32.20

SIDE

AIR COIL

14.00

10.73

Bottom View

Bottom Discharge

30.33

28.01

13.005.31

32.20

SIDE

AIR COIL

Dimensional Data

Model

024 -

048

060 -

072

without Control Box

Height

(A1)

Width

(B)

Depth

(C)

56.1 30.3 32.2 62.5 16.0 16.0 13.0 14.0 26.0 28.0

60.1 30.3 32.2 66.5 16.0 16.0 13.0 14.0 26.0 32.0

Notes: All Desuperheater connections are 3/4” FPT. All measurements are in inches.

* For the source water loop, GeoComfort residential models use 1” double o-ring ttings. GeoComfort commercial models, Hydron Module & TETCO models use 1” FPT ttings.

Enertech Global IOM, XT Models

Dimensional Data

with Control Box

Height

(A2)

Supply Air

(Top Discharge)

Supply Air

(Bottom Discharge)

Width Depth Width Depth

Return Air

Width

(E)

Height

(D)

Section 4: Unit Installation

ECM Fan Performance - Two-Stage Compressor Units

Model1Program

A 800 1000 800 1000 680 850 550 ON OFF ON OFF ON OFF OFF OFF

024

036

048

060

072

B 750 950 750 950 640 810 515 ON OFF OFF OFF ON OFF OFF OFF

C 700 850 700 850 595 725 475 ON OFF OFF ON ON OFF OFF OFF

D 600 750 600 750 510 640 450 OFF ON OFF OFF OFF ON OFF OFF

A - - - - - - - - - - - - - - -

B 1050 1350 1050 1350 895 1150 700 OFF OFF ON OFF OFF OFF OFF OFF

C 950 1200 950 1250 810 1065 635 OFF OFF OFF OFF OFF OFF OFF OFF

D 850 1100 850 1150 725 980 575 OFF OFF OFF ON OFF OFF OFF OFF

A 1500 1800 1500 1900 1275 1615 945 ON OFF ON OFF ON OFF OFF OFF

B 1450 1700 1450 1750 1235 1490 890 OFF ON ON OFF OFF ON OFF OFF

C 1300 1500 1300 1600 1105 1360 680 OFF ON OFF OFF OFF ON OFF OFF

D 1150 1350 1150 1400 725 OFF ON OFF ON OFF ON OFF OFF

A 1850 2200 1750 2100 1490 1785 980 OFF OFF ON OFF OFF OFF OFF OFF

B 1600 1850 1650 1950 1405 1660 870 ON OFF ON OFF ON OFF OFF OFF

C 1450 1700 1450 1750 1235 1490 800 ON OFF OFF OFF ON OFF OFF OFF

D 1300 1500 1300 1550 725 ON OFF OFF ON ON OFF OFF OFF

A - - - - - - - - - - - - - - -

B 1850 2100 1750 2150 1490 1830 1075 OFF OFF ON OFF OFF OFF OFF OFF

C 1650 2000 1600 1900 975 OFF OFF OFF OFF OFF OFF OFF OFF

D 1500 1750 1450 1700 875 OFF OFF OFF ON OFF OFF OFF OFF

Heating Modes Cooling Modes

1st

2nd

Stage

1st

Stage

2nd

Stage

Dehumidication

Stage

1st

Mode

2nd

Stage

Only

Fan

S1 S2 S3 S4 S5 S6 S7 S8

DIP Switch Settings

Notes:

1. Program B (Bold type) is factory settings and rated CFM. CFM is controlled within 5% up to the max. ESP.

Max. ESP includes allowance for wet coil and standard lter.

2. Power must be off to the unit for at least 3 seconds before the ECM motor will recognize a speed change.

3. Max ESP for models with internal electric heat is 0.6” ESP.

Dehumidication Mode Options

DIP Switch

S9 S10

ON OFF Normal Dehumidication mode disabled (normal Htg/Clg CFM) - factory setting

OFF ON ODD

OFF OFF Constant Dehum

ON ON Not Used Not an applicable selection

Notes:

1. To enter dehumidication mode, ODD input should be 0 VAC; for normal cooling CFM, ODD input should be 24VAC.

2. Heating CFM is not affected by dehumidication mode. When in dehumidication mode, cooling CFM is 85% of normal

cooling CFM.

Mode Operation

On Demand dehumidication mode (humidistat input at terminal ODD) -

Humidistat required

Constant dehumidication mode (always uses dehum CFM for cooling and

normal CFM for heating) - No humidistat required

IOM, XT Models Enertech Global

Section 4: Unit Installation

Unit Physical Data

Dual Capacity Vertical

Model Number 024 036 048 060 072

Fan Wheel (in.) 10 x 11 10 x 11 10 x 11 10 x 11 10 x 11

Fan Motor ECM (HP) .5 .5 .75 1 1

Refrigerant Charge (oz.) 48 68 63 84 86

Air Coil

Face Area (Sq.Ft.) 5.55 5.55 5.55 6.17 6.17

Dimensions (in.) 31.8 x 25.1 x 1.0 35.9 x 24.7 x 1.26

Number Of Rows N/A - Micro-Channel Coil

Filter 1” Thick 28 x 30 x 1 28 x 34 x 1

Unit Weight (nominal) - lbs 395 400 450 455 460

Unit Electrical Data:

Model

024

036

048

060

072

60Hz Power Compressor

Voltage

Code

1 208/230 1 58.3 11.7 3.9 0.5 4.0 20.1 23.0 35 12 49

0 208/230 1 58.3 11.7 3.9 N/A N/A 15.6 18.5 30 14 41

2 208/230 3 55.4 6.5 3.9 N/A N/A 10.4 12.0 15 14 62

3 460 3 28.0 3.5 3.9 N/A N/A 7.4 8.4 10 14 87

1 208/230 1 83.0 15.3 3.9 0.5 4.0 23.7 27.5 40 10 70

0 208/230 1 83.0 15.3 3.9 N/A N/A 19.2 23.0 35 12 52

2 208/230 3 73.0 11.6 3.9 N/A N/A 15.5 18.4 30 14 41

3 460 3 38.0 5.7 3.9 N/A N/A 9.6 11.0 15 14 67

1 208/230 1 104.0 21.2 5.2 0.5 5.5 32.4 37.7 50 8 79

0 208/230 1 104.0 21.2 5.2 N/A N/A 26.4 31.7 50 8 97

2 208/230 3 83.1 14.0 5.2 N/A N/A 19.2 22.7 35 12 52

3 460 3 41.0 6.4 5.2 N/A N/A 11.6 13.2 20 14 55

1 208/230 1 152.9 27.1 6.9 0.5 5.5 40.0 46.8 70 6 102

0 208/230 1 152.9 27.1 6.9 N/A N/A 34.0 40.8 60 6 120

2 208/230 3 110.0 16.5 6.9 N/A N/A 23.4 27.5 40 10 71

3 460 3 52.0 7.2 6.9 N/A N/A 14.1 15.9 20 14 45

1 208/230 1 179.2 29.7 6.9 0.5 5.5 42.6 50.0 80 6 95

0 208/230 1 179.2 29.7 6.9 N/A N/A 36.6 44.0 70 6 111

2 208/230 3 136.0 17.6 6.9 N/A N/A 24.5 28.9 45 10 68

3 460 3 66.1 8.5 6.9 N/A N/A 15.4 17.5 25 14 41

Volts Phase LRA RLA

ECM

Fan

Motor

FLA

HWG Pump

FLA

Ext

Loop

Pump

FLA*

Total

Unit FLA

Min Circuit AMPS

Max

Fuse

HACR

Min

AWG

Max

Notes:

1. All line and low voltage wiring must adhere to the National Electrical Code and local codes, whichever is the most stringent.

2. Wire length based on a one way measurement with a 2% voltage drop.

3. Wire size based on 60°C copper conductor and minimum circuit ampacity.

3. All fuses class RK-5.

4. Min/Max Voltage: 208/230/60/1 = 187-252, 208/230/60/3 = 187-252, 460/60/3 = 432-504

5. See Example Electrical Circuits for proper 460V power * The external loop pump FLA is based on a maximum of three UP26-116F-230V pumps (1/2hp) for 048 - 072 and two pumps for 024 - 036.

Enertech Global IOM, XT Models

Section 4: Unit Installation

Unit Return Air Conversion

Unit Conversion

Units are shipped in the left hand return

air, upow conguration. The control box

is shipped inside the unit. The control box plugs into the electrical connection plate on the top of the unit and mounts with two screws to the top of the unit.

To convert the unit to right hand return air:

1. Remove the front panels and rear panels. The panel screws are located under the band that runs across the middle of the unit.

(GeoComfort & Hydron Module units only)

2. Rotate the unit to the correct position.

3. Move the unit controls connection plate from its current position (on the top of the unit) to the opposite side of the top of the unit. Use the block off plate from that side to cover the other side.

4. Mount the control box on what is now the top front of the unit. Plugs are available now to facilitate this.

5. Replace the front and rear panels onto the unit.

The source, hot water generator, and condensate

ttings are on the air coil side of the unit, under

the air coil itself. These connections are easier to

facilitate if done prior to the tting of the return air

drop.

To convert the unit to downow supply air:

1. Remove the screws holding the blower and heater housing and drop the assembly down.

2. Remove the block off plate from the area under the blower housing on the bottom blower section panel.

3. Place the block off plate over the opening where the blower housing was.

4. Install the downow duct kit (instruction included with kit, which is ordered and shipped separately) in the compressor section of the unit.

5. Install the heater and blower housing assembly

onto the downow opening in the blower

section securing it with the screws removed in step 1.

Figure 2: Blower Housing Connections

NOTE: Do not pry on the "belly band" that runs across the front of the unit to hide the access panel screws. Slight pressure on the rounded portion of the "belly band" will release the catch.

(GeoComfort & Hydron Module units only)

IOM, XT Models Enertech Global

Section 5: Unit Piping Installation

Water Quality

The quality of the water used in geothermal systems is very important. In closed loop systems the dilution water (water mixed with antifreeze) must be of high quality to ensure adequate corrosion protection. Water of poor quality contains ions that

make the uid “hard” and corrosive. Calcium and

magnesium hardness ions build up as scale on the walls of the system and reduce heat transfer. These ions may also react with the corrosion inhibitors

in glycol based heat transfer uids, causing them

to precipitate out of solution and rendering the inhibitors ineffective in protecting against corrosion. In addition, high concentrations of corrosive ions, such as chloride and sulfate, will eat through any protective layer that the corrosion inhibitors form on the walls of the system.

Ideally, de-ionized water should be used for dilution with antifreeze solutions since de-ionizing removes both corrosive and hardness ions. Distilled water and zeolite softened water are also acceptable. Softened water, although free of hardness ions, may actually have increased concentrations of corrosive ions and, therefore, its quality must be monitored.

It is recommended that dilution water contain less than 100 PPM calcium carbonate or less than 25 PPM calcium plus magnesium ions; and less than 25 PPM chloride or sulfate ions.

In an open loop system the water quality is of no less importance. Due to the inherent variation of the supply water, it should be tested prior to making the decision to use an open loop system. Scaling of the heat exchanger and corrosion of the internal parts are two of the potential problems. The Department of Natural Resources or your local municipality can direct you to the proper testing agency. Please see following table for guidelines.

Removing Debris During Purging

Most ow center or pump failures are a result of

poor water quality or debris. Debris entering the loop during fusion and installation can cause noise aand premature pump failure. Enertech recommends a

double ush ltering method during purging. When purging, use a 100 micron bag lter until air bubbles

are removed. Remove the 100 micron bag, replace

it with a 1 micron bag and restart the ushing.

Water Quality Guidelines

Potential

Problem

Scaling

Corrosion

Biological

Growth

Erosion

Chemical(s) or Condition

Calcium & Magnesium

Carbonate

pH Range 7 - 9 5 - 9 7 - 9

Total Dissolved Solids Less than 1000 ppm Less than 1500 ppm No rigid setpoint

Ammonia, Ammonium

Hydroxide

Ammonium Chloride,

Ammonium Nitrate

Calcium/Sodium Chloride

Suspended Solids - Note 5 Less than 10 ppm Less than 10 ppm

See Note 4

Chlorine Less than 0.5 ppm Less than 0.5 ppm Less than 1 ppm*

Hydrogen Sulde None Allowed None Allowed Less than 0.05 ppm

Iron Bacteria None Allowed None Allowed None Allowed

Iron Oxide Less than 1 ppm Less than 1 ppm Less than 0.2 ppm

Water Velocity Less than 8 ft/s Less than 12 ft/s

Range for Copper

Heat Exchangers

Less than 350 ppm Less than 350 ppm Less than 0.1 ppm

Less than 0.5 ppm Less than 0.5 ppm No Limit

Less than 0.5 ppm Less than 0.5 ppm Less than 2-20 ppm

Less than 125 ppm Less than 125 ppm None Allowed

Cupro-Nickel Heat

Exchanger Ranges

Stainless Steel Heat

Exchanger Ranges

16-20 mesh strainer

recommended

Less than 5.5 m/s in the

port

Enertech Global IOM, XT Models

Section 5: Unit Piping Installation

Interior Piping

All interior piping must be sized for proper ow rates

and pressure loss. Insulation should be used on all inside piping when minimum loop temperatures are expected to be less than 50°F. Use the table below for insulation sizes with different pipe sizes. All pipe insulation should be a closed cell and have a minimum wall thickness of 3/8”. All piping insulation should be glued and sealed to prevent condensation and dripping. Interior piping may consist of the following materials: HDPE, copper, brass, or rubber hose (hose kit only). PVC is not allowed on pressurized systems.

Table 3: Pipe Insulation

Piping Material Insulation Description

1” IPS Hose 1-3/8” ID - 3/8” Wall

1” IPS PE 1-1/4” ID - 3/8” Wall

1-1/4” IPS PE 1-5/8” ID - 3/8” Wall

2” IPS PD 2-1/8” ID - 3/8” Wall

Typical Pressurized Flow Center Installation

The ow centers are insulated and contain all ushing and circulation connections for residential

and light commercial earth loops that require a

ow rate of no more than 20 gpm. 1-1/4” fusion x 1” double o-ring ttings (AGA6PES) are furnished with the double o-ring ow centers for HDPE loop constructions. Various ttings are available for the double o-ring ow centers for different connections. See gure 6 for connection options.

A typical installation will require the use of a hose kit. Matching hose kits come with double o-ring adapters to transition to 1” hose connection.

Note: Threaded ow centers all have 1” FPT connections. Matching hose kits come with the AGBA55 adapter needed to transition from 1” FPT to 1” hose.

Figure 6: Typical Single Unit Piping Connection (Pressurized Flow Center)

To/From

Loop Field

Air Coil

Flow

Center

Hose

Kit

P/T Ports

Source Water Out

Source Water In

IOM, XT Models Enertech Global

Equipment Pad

2” Polyethylene Foam

Note: P/T ports should be angled away from the unit for ease of gauge reading.

Section 5: Unit Piping Installation

Typical Non-Pressurized Flow Center Installation

Standing column ow centers are designed to

operate with no static pressure on the earth loop. The design is such that the column of water in the

ow center is enough pressure to prime the pumps

for proper system operation and pump reliability.

The ow center does have a cap/seal, so it is still a closed system, where the uid will not evaporate. If

the earth loop header is external, the loop system

will still need to be ushed with a purge cart.

Figure 7: Typical Single Unit Piping Connection (Non-Pressurized Flow Center)

To/From

Loop Field

The non-pressurized ow center needs to be isolated from the ush cart during ushing because the ow

center is not designed to handle pressure. Since this is a non-pressurized system, the interior piping can incorporate all the above-mentioned pipe material options (see interior piping), including PVC. The

ow center can be mounted to the wall with the included bracket or mounted on the oor as long as

it is properly supported.

Flow

Center

Flush Valve

Hose

Kit

Air Coil

P/T Ports

Equipment Pad

2” Polyethylene Foam

Source Water Out

Source Water In

Enertech Global IOM, XT Models

Section 5: Unit Piping Installation

Pressurized Flow Center and Pump Mounting

ﬂow center can mounted with the ﬂow paths either or (see the ﬂow center cannot when the pump

mounted on its upside or at an as premature pump will occur

is not in the

and series ﬂow centers

important to pump is terminal and proper control

pump terminal must located in a to running into the

control

and also to the designed to drain any that may

are located on three sides the pump.

terminal and pumps.

IOM, XT Models Enertech Global

Section 5: Unit Piping Installation

Condensation Drain Connection

Connect the EZ-Trap to the equipment condensate

drain connection as shown in gures 9a through 9d.

The condensate line must be trapped a minimum of 1.0” as shown on diagram. The condensate line should be pitched away from the unit a minimum of 1/4” per foot. The condensate line from the unit drain connection to the P-trap should be sloped downward. For moreinformation on installing EZ-Trap, see installationsheet that comes with the EZ-Trap Kit. Always install the air vent after the trap. Note: Connect the drain through the trap to the condensation drain system in conformance

Figure 9a: Condensation Drain Connection

Note: Make Sure the condensate overow sensor is

mounted to the side closest to the drain being used

as shown in gures 9c and 9d below.

Figure 9c: Left Overow Sensor Connection

Figure 9d: Right Overow Sensor Connection

Figure 9b: Condensation Drain Drop

to local plumbing codes.

Part Number Description ACDT1A EZ-Trap ¾” Kit ACDT2A EZ-Trap 1” Kit

Enertech Global IOM, XT Models

Section 5: Unit Piping Installation

0 10 20 30 40 50 60 70 80 90 CAPACITY - U.S. GPM

120

110

100

Total Head in Feet

SUCTION LIFT

25’

20’

15’

Meyers QP-15

1-1/2 HP Self-Priming

Centrifugal Pump

Flushing & Charging a Pressurized Flow Center

Once piping is completed between the unit, ow center, and the earth loop, nal purging and charging of the system is needed. A ush cart (at

least a minimum of 1.5 hp pump motor or larger)

is needed to achieve adequate ow velocity (2

fps in all piping) in the loop to purge air and debris from the loop piping (unless the header manifold is located inside and has isolation valves). All air and debris must be removed from the system before

operation or pump failure could result. The ush ports located on the ow center are access to the piping system for the ush cart. See gure 7 for

connection details.

The 3-way valves on the ow center include

direction indicators on the valves which determine

the ow path. A 3/8” socket drive is required to

operate the 3-way valves. The valves will turn in either direction, 360 degrees. Make sure during this process that the valves are in the same position so that air does not become trapped in the system.

Figure 9: Enertech Flush Cart

Flush Cart Design

The Enertech Manufacturing ush cart has been designed to effectively and efciently ush the earth loop and to facilitate injecting and mixing of

the antifreeze. The single most important element

in ow center reliability is the ability to remove all

the air and debris from the loop and to provide the proper working pressure.

Features of the ush cart

Cylinder: HDPE, SDR15.5, 10” dia. (10 Gallons) Pump: Myers High Head QP15, 1.5hp, 115V

Hose connections: Cam Lock quick connects -

1-1/2” hoses Hand Truck: 600lb rating with pneumatic tires

Wiring: Liquid Tight metal on/off switch

Tubing: SDR11 HDPE Connections: 2 - 3/4” connections for antifreeze and discharge Drain: one on the pump and the tank

Figure 10: Flush Cart Pump Curve

IOM, XT Models Enertech Global

Step 1: Flushing the Earth Loop

1. Connect ush cart hoses to ow center ush ports using proper adapters #AGAFP.

2. Connect water supply to hose connection on

return line of ush cart.

3. Turn both 3-way valves on ow center to ush ports and loop position.

4. Turn on water supply (make sure water is of proper quality).

5. As the reservoir lls up, turn the pump on and off, sucking the water level down. Do not allow the

water level to drop below intake tting to the

pump.

6. Once the water level remains above the water outlet in the reservoir leave the pump running continuously.

Flush Port

Section 5: Unit Piping Installation

Figure 7: Flush Cart Connections Figure 8: Flow Center 3-Way Valves

Loop Loop

Flush Port

Unit Unit

Loop Loop

Unit Unit

1. Once the water level stays above the “T” in the reservoir, turn off the water supply (this also allows observation of air bubbles).

2. 8.

Run the pump for a minimum of 2 hours for

proper ushing and purging (depending on

system size it may take longer).

3. “Dead head” the pump every so often and

watch the water level in the reservoir. Once all

the air is removed there should not be more than a 1” to 2” drop in water level in the reservoir. If there is more than a 2” drop, air is still trapped in the system. This is the only way to tell if air is still trapped in the system.

4. To dead head the pump, shut off the return side

ball valve on the ush cart. This will provide a

surge in pressure to the system piping, helping to

get the air bubbles moving. Do not reverse ow during ushing.

Water Quality: Even on a closed loop system water quality is an issue. The system needs to be lled with clean water. If the water on site has high iron content, high hardness, or the PH is out of balance, premature pump failure may result. Depending upon water

quality, it may need to be brought in from off site.

Step 2: Flushing the Unit

1. Turn off the pump on the ush cart.

2. Turn both 3-way valves to the unit and ush port position.

3. Turn the pump back on. It may be necessary to turn the water supply back on to keep the water level in the reservoir above the return tee.

4. This should only take 5 to 10 minutes to purge the unit.

5. Once this is done, the entire system is now full of

water, and the ush cart pump may be turned

off.

Step 3: Adding Antifreeze by Displacement

If the antifreeze was not added when the loop was

being lled, it will be necessary to follow the next

few steps.

1. Turn both 3-way “Ts” back to the original position

for ushing the loop only.

2. Close the return side ball valve on the ush cart.

3. Connect hose to the return side discharge line

and run it to a drain. Open the ball valve on discharge line on ush cart.

4. Turn pump on until water level is sucked down

just above the water outlet in the reservoir, and

turn pump off. Be sure not to suck air back into the system.

5. Fill the reservoir back up with the antifreeze.

6. Repeat steps 5 and 6 until all the antifreeze is in the system and reservoir.

7. Turn the discharge line ball valve off at the ush cart. Turn the return line ball valve back to the on position.

Enertech Global IOM, XT Models

Section 5: Unit Piping Installation

8. It may be necessary to add some water into the reservoir to keep the water level above the return tee so that the solution does not foam.

9. The system must be run for 3 to 4 hours to mix the

antifreeze and water in the reservoir. The uid

will not mix inside the loop.

10. Check the antifreeze level every so often to insure that the proper amount was added to the system (see antifreeze charging section).

Step 4: Final Pressurization of System

Once all of the air and debris has been removed,

and the antifreeze has been added and mixed, the

system is ready for nal pressurization.

1. Turn one of the 3-way valves so that it is open

to all 3 ports, the unit, loop, and ush port. Turn

the other valve so it is only open to the loop and

ush port (pressure is also applied to the hose kit

in this arrangement).

2. Turn the ush cart pump on and allow the system to start circulating.

3. With the pump running, turn the return line ball

valve to the off position on the ush cart, “dead

heading” the pump.

4. There should be a maximum of 1” to 2” inches of drop in the water level in the reservoir. This only takes about 3-5 seconds.

5. Next, turn the supply line ball valve to the off

position on the ush cart (isolates the ow center from the ush cart).

6. Now that the system is isolated from the reservoir the pump can be turned off. Do not open the

main ush cart ball valves yet.

7. Connect the water supply back to the discharge line hose connection, and open the ball valve. Turn on the water supply and leave it on for 20 to 30 minutes. This will stretch the pipe properly to

insure that the system will not have a “at” loop

during cooling operation.

8. Once the loop is pressured (recommended pressure on initial start up is 50 to 70 psi), turn the water supply off. Turn off the discharge line ball valve, and disconnect the water supply. Maximum pressure should never exceed 100 psi under any circumstance!

9. Turn the 3-way valves on the ow center back to the normal operation mode, which closes the

ush port connections.

10. Open the ball valves on the ush cart to relieve pressure on the hoses. Disconnect the hoses from

the ow center.

Note: Pressurized ow centers and Grundfos UP series pumps need a minimum of 3psi on the suction side of the pump to operate. Maximum operating pressure is 100 psi.

Loop static pressure will uctuate with the seasons.

Pressures will be higher in the winter months than during the summer months. In the cooling mode

the heat pump is rejecting heat, which relaxes the pipe. This uctuation is normal and needs to

be considered when charging and pressuring the system initially. Typical operating pressures of an earth loop are 15 to 50 psi.

Note - Burping pump(s): On ow center initial start up, the pumps must be bled of air. Start the system and remove the bleed screw from the back side of the pump(s). This allows any trapped air to bleed out. It also oods the pump shaft, and keeps the pump(s) cool. Failure to do this could result in

premature pump failure.

Typical Non-Pressurized Flow Center Installation

Standing column ow centers are designed to

operate with no static pressure on the earth loop. The design is such that the column of water in the

ow center is enough pressure to prime the pumps

for proper system operation and pump reliability.

The ow center does have a cap/seal, so it is still a closed system, where the uid will not evaporate. If

the earth loop header is external, the loop system will

still need to be ushed with a purge cart. The nonpressurized ow center needs to be isolated from the ush cart during ushing because the ow center is

not designed to handle pressure. Since this is a nonpressurized system, the interior piping can incorporate all the above-mentioned pipe material options (see

interior piping), including PVC. The ow center can

be mounted to the wall with the included bracket

or mounted on the oor as long as it is properly

supported.

IOM, XT Models Enertech Global

Section 5: Unit Piping Installation

Flushing the Interior Piping (Non-Pressurized)

Do not use the ush cart to purge the interior piping and ow center in a non-pressurized system. Once the loop has been ushed the ball valves may be opened above the ush ports. Take a garden hose from the ush port connected to the water out to

the loop pipe, and run the other end of the hose into the top of the canister. Fill the canister with

water and turn the pumps on. Continue to ll the

canister until the water level stays above the dip

tube. Once lling is complete, remove the hose and close the ush port. Turn the system on. Any air

that may still be in the system will burp itself out of

the top of the canister. Leave the top open for the rst 1/2 hour of run time to ensure that all of the air is bled out. Tighten the cap on the ow center to complete the ushing and lling procedure (hand

tighten only -- do not use a wrench).

Antifreeze Overview

In areas where minimum entering loop temperatures drop below 40°F, or where piping will be routed

through areas subject to freezing, antifreeze is

required. Alcohols and glycols are commonly used as antifreeze. However, local and state/provincial codes supersede any instructions in this document. The system needs antifreeze to protect the coaxial heat exchanger from freezing and rupturing. Freeze protection should be maintained to 15°F below the lowest expected entering source loop temperature. For example, if 30°F is the minimum expected entering source loop temperature, the leaving source loop temperature could be 22 to 25°F. Freeze protection should be set at 15°F (30-15 = 15°F). To determine antifreeze requirements, calculate how much volume the system holds. Then, calculate how much antifreeze will be needed by determining the percentage of antifreeze required for proper freeze protection. See Tables 4 and 5 for volumes and percentages. The freeze protection should be checked during installation using the proper

hydrometer to measure the specic gravity and

freeze protection level of the solution.

Antifreeze Characteristics

Selection of the antifreeze solution for closed loop systems require the consideration of many important factors, which have long-term implications on the performance and life of the equipment. Each area

of concern leads to a different “best choice” of

antifreeze. There is no “perfect” antifreeze. Some of the factors to consider are as follows (Brine = antifreeze solution including water):

Safety: The toxicity and ammability of the brine

(especially in a pure form).

Cost: Prices vary widely.

Thermal Performance: The heat transfer and viscosity

effect of the brine.

Corrosiveness: The brine must be compatible with the system materials.

Stability: Will the brine require periodic change out or maintenance? Convenience: Is the antifreeze available and easy to transport and install?

Codes: Will the brine meet local and state/provincial codes?

The following are some general observations about the types of brines presently being used:

Methanol: Wood grain alcohol that is considered toxic in pure form. It has good heat transfer, low viscosity, is non-corrosive, and is mid to low price.

The biggest down side is that it is ammable in

concentrations greater than 25%.

Ethanol: Grain alcohol, which by the ATF (Alcohol, Tobacco, Firearms) department of the U.S. government, is required to be denatured and

rendered unt to drink. It has good heat transfer,

mid to high price, is non-corrosive, non-toxic even in its pure form, and has medium viscosity.

It also is ammable with concentrations greater

than 25%. Note that the brand of ethanol is very important. Make sure it has been formulated for the geothermal industry. Some of the denaturants are not compatible with HDPE pipe (for example, solutions denatured with gasoline).

Enertech Global IOM, XT Models

Section 5: Unit Piping Installation

Propylene Glycol: Non-toxic, non-corrosive, mid to high price, poor heat transfer, high viscosity when cold, and can introduce micro air bubbles when adding to the system. It has also been known to

form a “slime-type” coating inside the pipe. Food

grade glycol is recommended because some of the other types have certain inhibitors that react poorly with geothermal systems. A 25% brine solution is a minimum required by glycol manufacturers, so that bacteria does not start to form.

Ethylene Glycol: Considered toxic and is not recommended for use in earth loop applications.

GS4 (POTASSIUM ACETATE): Considered highly corrosive (especially if air is present in the system) and has a very low surface tension, which causes

leaks through most mechanical ttings. This

brine is not recommended for use in earth loop applications.

Notes:

1. Consult with your representative or distributor if you have any questions regarding antifreeze selection or use.

2. All antifreeze suppliers and manufacturers recommend the use of either de-ionized or distilled water with their products.

Antifreeze Charging

Calculate the total amount of pipe in the system and use Table 4 to calculate the amount of volume

for each specic section of the system. Add the

entire volume together, and multiply that volume by the proper antifreeze percentage needed (Table 5) for the freeze protection required in your area. Then, double check calculations during installation with

the proper hydrometer and specic gravity chart

(Figure 9) to determine if the correct amount of antifreeze was added.

Table 4: Pipe Fluid Volume

Type Size

Copper 1” CTS 4.1

Copper 1.25” CTS 6.4

Copper 1.5” CTS 9.2

HDPE .75 SDR11 3.0

HDPE 1” SDR11 4.7

HDPE 1.25” SDR11 7.5

HDPE 1.5: SDR11 9.8

HDPE 2” SDR11 15.4

Additional component volumes:

Unit coaxial heat exchanger = 1 Gallon Flush Cart = 8-10 Gallons 10’ of 1” Rubber Hose = 0.4 Gallons

Volume Per 100ft

US Gallons

⚠ CAUTION ⚠

USE EXTREME CARE WHEN OPENING, POURING,

AND MIXING FLAMMABLE ANTIFREEZE SOLUTIONS.

REMOTE FLAMES OR ELECTRICAL SPARKS CAN IGNITE UNDILUTED ANTIFREEZES AND VAPORS.

USE ONLY IN A WELL VENTILATED AREA. DO

NOT SMOKE WHEN HANDLING FLAMMABLE

SOLUTIONS. FAILURE TO OBSERVE SAFETY

PRECAUTIONS MAY RESULT IN FIRE, INJURY, OR

DEATH. NEVER WORK WITH 100% ALCOHOL

SOLUTIONS.

IOM, XT Models Enertech Global

Specific Gravity

Section 5: Unit Piping Installation

Table 5: Antifreeze Percentages by Volume

Type of Antifreeze

10°F (-12.2°C) 15°F (-9.4°C) 20°F (-6.7°C) 25°F (-3.9°C)

Minimum Temperature for Freeze Protection

ProCool (Ethanol) 25% 22% 17% 12%

Methanol 25% 21% 16% 10%

Propylene Glycol 38% 30% 22% 15%

Heat Transfer Fluid (HTF) Mix according to manufacturer’s directions on container label

Antifreeze solutions are shown in pure form - not premixed HTF is a premixed Methanol solution

NOTE: Most manufacturers of antifreeze solutions recommend the use of de-ionized water. Tap water may include chemicals that could react with the antifreeze solution.

Figure 9: Antifreeze Specic Gravity

1.0500

1.0400

1.0300

1.0200

1.0100

1.0000

0.9900

0.9800

0.9700

0.9600

-5 0 5 10 15 20 25 30 32

Freeze Protection (deg F)

Procool Methanol Propylene Glycol

Enertech Global IOM, XT Models

2” Polyethylene Foam

24VAC 24VAC

240V IN

240V OUT

Relay Relay

240VAC

Power Source

240VAC

to Pump(s)

24VAC

connection

to unit #2

(Y1 & C From Thermostat)

24VAC

connection

to unit #1

(Y1 & C From Thermostat)

Section 5: Unit Piping Installation

APSMA Pump Sharing Module

The pump sharing module, part number APSMA,

is designed to allow two units to share one ow

center. With the APSMA module, either unit can

energize the pump(s). Connect the units and ow

center as shown in Figure 16, below. Figure 17 includes a schematic of the board. The module must be mounted in a NEMA enclosure or inside

the unit control box. Local code supersedes any

recommendations in this document.

Single Shared Flow Center, Dual Unit Piping Example

Loop Field

P/T Ports

Source Out

P/T Ports

Source In

air

coil

Shut O

Valves

Flow

Center

Hose

Kit

Shut O

Valves

air coil

P/T Ports

Source Out

P/T Ports

Source In

Figure 16: APSMA Module Layout

240VAC

Power Source

24VAC

connection

to unit #1

(Y1 & C From Thermostat)

240V IN

240V OUT

Relay Relay

24VAC 24VAC

240VAC

to Pump(s)

(Y1 & C From Thermostat)

Figure 17: APSMA Module Wiring Schematic

Bridge

LED

24VAC input from unit #1

24VAC input from unit #2

Diode

RY1

RY2

240VAC input

Diode

RY2

240VAC to pump(s)

24VAC

connection

to unit #2

Single Shared Loop Field, Individual Flow Center and Unit Piping Example

Equipment Pad

Loop Field

air coil

P/T Ports

Source Out

P/T Ports

Source In

Direction

of Flow

Flow

Center

Direction

of Flow

Equipment Pad

Shut O

Valves

Check

Valve

Equipment Pad

air coil

P/T Ports

Source Out

P/T Ports

Source In

Flow

Center

Direction

of Flow

Equipment Pad

Shut O

Valves

Check

Valve

P/T Ports

Source Out

P/T Ports

Source In

air coil

Flow

Center

Direction

of Flow

Shut O

Valves

Check

Valve

IOM, XT Models Enertech Global

From Loop

Field

Loop

Field

Flush Valve

Section 5: Unit Piping Installation

Open Loop Piping and Connections

Placement of the components for an open loop system are important when considering water quality and long term maintenance. The water solenoid valve should always be placed on the outlet of the heat pump, which will keep the heat exchanger under pressure when the unit is not operating. If the heat exchanger is under pressure, minerals will stay in suspension. Water solenoid valves are also designed to close against the pressure, not with the pressure.

Otherwise, they tend to be noisy when closing.

A ow regulator should be placed after the

water solenoid valve. Always check the product

specication catalog for proper ow rate. A calculation must be made to determine the ow

rate, so that the leaving water temperature does not have the possibility of freezing.

Other necessary components include a strainer, boiler drains for heat exchanger ushing, P/T ports

and ball valves. Ball valves allow the water to be shut off for service, and also help when velocity

noise is noticeable through the ow regulator.

Spreading some of the pressure drop across the ball valves will lessen the

velocity noise. Always double check ow rate at the P/T ports to make sure the ball valve adjustments have not lowered water ow too much, and essentially taken the ow regulator out of the

equation. It’s a good idea to remove the ball valve handles once the system is completed to avoid nuisance service calls.

Hose kits are optional, but make for an easier installation, since the P/T ports and connections are included. The hose also helps to isolate the heat pump from the piping system.

Since the heat pump can operate at lower

waterow on rst stage, two stage units typically

include two water solenoid valves to save water.

The ow regulators should be sized so that when one valve is open the unit operates at rst stage ow rate, and when both valves are open, the unit operates at full load ow rate. For example, a 4 ton unit needs approximately 4 GPM on rst stage, and approximately 7 GPM at full load. The ow regulator after the rst valve should be 4 GPM, and the ow

regulator after the second valve should be 3 GPM. When both valves are open, the unit will operate at 7 GPM.

Figure 5: Open Loop Piping Example

LEFT

VIEW

air

coil

*Hose

Kits

P/T Ports

Source Out

P/T Ports

Source In

Boiler

Drains

Equipment Pad

2” Polyethylene Foam

*Hose kit is used for piping isolation, and includes ttings for P/T ports.

**See product specifications for flow rates.

(2 required)

(optional)

Two Stage Units

Single Stage

Units

**Flow

Regulator

Strainer

Ball Valve

(2 required)

The drawings show typical components, wiring and connection points. Electrical connections are found at the control box terminal strips.

Note: All XT models are

two-stage units.

Two-Stage solenoid example is optional for all sizes. It is not recommended for 3 ton and smaller. Use single solenoid

and ow regulator.

Enertech Global IOM, XT Models

Section 5: Unit Piping Installation

Open Loop Single Stage Solenoid Connections

Open Loop Two-Stage Solenoid Connections

2nd STAGE

IOM, XT Models Enertech Global

Section 6: Desuperheater Installation

Desuperheater Installation

Units that ship with the desuperheater function also ship with a connection kit.

Note: Desuperheater capacity is based on 0.4 GPM Flow per nominal ton at 90°F entering hot water temperature.

Note: Units that are shipped with a desuperheater do not have the desuperheater pump wires connected to the electrical circuit, to prevent accidentally running the pump while dry. Pump has to be connected to the electric circuit (master contactor) when the lines from the water heater are installed & air is removed.

CONTENTS OF THE DESUPERHEATER FITTING KIT:

• (1) p/n 20D052-01NN, Installation Instructions

• (1) p/n 33P211-01BN, 3/4”x 3/4”x 3/4” FPT Brass Tee

• (1) p/n 33P210-01NN, ¾” Boiler Drain Valve

• (1) p/n 11080005001, ¾” MPT x 3-1/2” Brass Nipple

• (3) p/n 11080006001, ½” SWT x ¾” MPT Copper Adaptor

• (1) p/n 11080007001, ¾” x ¾” x ½” SWT Copper Tee

Plumbing Installation

NOTE: All plumbing and piping connections must comply with local plumbing codes.

Note: Copper is the only approved material for desuperheater piping.

TIP: Measure the distance above the oor or shelf

that the water heater is setting on, to where the drain valve is located. This distance must be greater than one-half the width of the tee you’re about to install, or you won’t be able to thread the tee on to the water heater.

1. Disconnect electricity to water heater.

2. Turn off water supply to water heater.

3. Drain water heater. Open pressure relief valve.

4. Remove drain valve and tting from water heater.

5. Thread the ¾” MPT x 3-1/2” nipple into the water

heater drain port. Use Teon tape, or pipe dope

on threads.

6. Thread the center port of the ¾” brass tee to the other end of the nipple.

7. Thread one of the copper adaptors into the end of the tee closest to the heat pump.

8. Thread the drain valve into the other end of the nipple. See Figure 1.

⚠ WARNING ⚠

TO AVOID SERIOUS INJURY, IT IS RECOMMENDED

THAT AN ANTI-SCALD MIXING VALVE IS INSTALLED

ON THE HOT WATER SUPPLY LINE INTO THE HOME.

EVEN THOUGH HOT WATER TANK TEMPERATURES

COULD APPEAR TO BE SET AT LOWER LEVELS,

HIGH TEMPERATURE WATER UP TO 130 DEGREES

FROM THE DESUPERHEATER COULD RAISE TANK

TEMPERATURES TO UNSAFE LEVELS.

9. Above the water heater, cut the incoming cold water line. Remove a section of that line to enable the placement of the copper tee.

10. Insert the copper tee in the cold water line. See Figure 2.

11. Thread the remaining two ½”SWT x ¾”MPT

copper adaptors into the ¾” FPT ttings on the heat pump, marked HWG IN and HWG OUT.

12. Run interconnecting ½” copper pipe from

the HOT WATER OUT on the heat pump, to the

copper adaptor located on the tee at the bottom of the water heater.

Enertech Global IOM, XT Models

Section 6: Desuperheater Installation

13. Install an air vent tting at the highest point of the line from step 13 (assuming it’s the higher of the two lines from the heat pump to the water heater).

14. Shut off the valve installed in the desuperheater

line close to the tee in the cold water line. Open

the air vent and all shut off valves installed in the

“hot water hot”.

15. Turn the water supply to the water heater on. Fill

water heater. Open highest hot water faucet to

purge air from tank and piping.

16. Run interconnecting ½” copper pipe from the

HOT WATER IN on the heat pump, to the copper

tee in the cold water line.

Figure 10: Water Heater Connection Kit Assembly for Bottom of Water Heater

17. Flush the interconnecting lines, and check for leaks. Make sure air vent is shoutoff when water begins to drip steadily from the vent.

18. Loosen the screw on the end of the

despuerheater pump to purge the air from the pump’s rotor housing. A steady drip of water will indicate the air is removed. Tighten the screw and the pump can be connected to the contactor or teminal block.

19. Install 3/8” closed cell insulation on the lines connecting the heat pump to the water heater.

20. Reconnect electricity to water heater.

NOTE: Drawing shown vertically for detail. Fitting installs horizontally into hot water tank. Desuperheater circuits are NOT to be connected to gas water heaters!

Connection to Hot Water Tank

Drain

Copper Tee For Domestic Cold Water In Line (installed within 12” from top of tank)

Brass Tee

Adapter to Unit Water Line

IOM, XT Models Enertech Global

Section 6: Desuperheater Installation

Hot Water Out

Hot Water In

Hot Water Out

Hot Water In

Typical Desuperheater Installation with Single Water Heater

Cold Water Supply

Hot Water

Shutoff Valves

Water Heater (or Storage Tank)

Air Vent Located at System High Point

Air Coil

Unit Water

Connection Detail

3/4” Copper Adapter Fitting

Shutoff

Drain Valve

Valves

HWG Out

HWG In

Desuperheater Installation with Preheat Tank

Cold Water

Hot Water

Water Heater No. 2

(or Storage Tank)

Cold Water

Supply

Hot Water

Water Heater No. 1

Supply

(or Storage Tank)

Shutoff Valves

Air Vent Located at System High Point

Unit Water

Connection Detail

Air Coil

3/4” Copper Adapter Fitting

Drain Valve

Desuperheater circuits are NOT to be connected to gas water heaters!

Enertech Global IOM, XT Models

Drain

Valve

Shutoff Valves

HWG Out

HWG In

Section 7: Auxiliary Heater Installation

Auxiliary Heater Nomenclature Decoder

Safety Labeling and Signal Words

DANGER, WARNING, CAUTION, and NOTE The signal words Danger, Warning, Caution, and Note are used to identify levels of hazard seriousness.

The signal word Danger is only used on products label to signify and immediate hazard. The signal words Warning, Caution, and Note will be used on product labels and throughout this manual and other manuals that may apply to this product.

“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.

Signal Words in Manuals

The signal word WARNING is used throughout this manual in the following manner:

⚠ WARNING ⚠

The signal word CAUTION is used throughout this

manual in the following manner:

⚠ CAUTION ⚠

Signal Words on Product Labeling

Signal words are used in combination with colors and/or on product labels.

“Note:” Used to highlight suggestions which will result in enhanced installation, reliability, or operation.

IOM, XT Models Enertech Global

Section 7: Auxiliary Heater Installation

Introduction

The AHTR electric heater is designed specically for the Enertech XT/CT and YT Series Geothermal

Heat Pump Unit. Engineering and quality control is built into every electric heater assembly. Good performance depends on proper application and correct installation.

The information contained in this manual is intended

for use by a qualied service technician familiar with

safety procedures and equipped with the proper tools and test instruments.

Shut OFF electric power at unit disconnect and/ or service panel before beginning the following procedures.

⚠ WARNING ⚠

ELECTRICAL SHOCK HAZARD

FAILURE TO FOLLOW THIS WARNING COULD

RESULT IN PERSONAL INJURY, PROPERTY

DAMAGE AND/OR DEATH. INSTALLATION OR

REPAIRS MADE BY UNQUALIFIED PERSONS

CAN RESULT IN HAZARDS TO YOU AND

OTHERS. INSTALLATION MUST CONFORM

WITH LOCAL BUILDING CODES OR, IN THE

ABSENCE OF LOCAL CODES, WITH NATIONAL

ELECTRICAL CODE ANSI/NFPA 70-2008 OR

CURRENT EDITION.

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.

Overview

This instruction covers the physical installation of the AHTR Series electric heat kits when installed

with the XT, CT or YT Series Geothermal Heat Pump

units.

The electric heat accessories are used for applications of heat pump with electric heat. Each

of the unit models are approved for use with specic

electric heat accessories. The installation instructions list the possible combinations and other important electrical data and limitations.

Note: AHTR electric heaters are not backward compatible.

Table 1: Heater Compatibility

Inspection

Upon receipt of any geothermal accessory, 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 Manufacturing, 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.

Enertech Global IOM, XT Models

Model Description

AHTR101C

AHTR151C

AHTR151CC*

AHTR201C

AHTR201CC*

*Canadian single point connection

Accessory Heater Usage

10kW, 60Hz, 1 Phase

w/Circuit Breaker

15kW, 60Hz, 1 Phase

w/Circuit Breaker

20kW, 60Hz, 1 Phase

w/Circuit Breaker

Used With

XT/CT, YT Model

024 - 072

036 - 072

060 - 072

Section 7: Auxiliary Heater Installation

⚠ WARNING ⚠

ELECTRICAL SHOCK HAZARD

FAILURE TO FOLLOW THIS WARNING COULD

RESULT IN PERSONAL INJURY OR DEATH.

BEFORE INSTALLING, MODIFYING, OR

SERVICING SYSTEM, MAIN ELECTRICAL

DISCONNECT SWITCH MUST BE IN THE OFF

POSITION.

THERE MAY BE MORE THAN ONE DISCONNECT

SWITCH. LOCK OUT

AND TAG SWITCH WITH SUITABLE WARNING

LABEL.

⚠ CAUTION ⚠

CUT HAZARD

FAILURE TO FOLLOW THIS CAUTION MAY

RESULT IN PERSONAL INJURY.

SHEET METAL PARTS MAY HAVE SHARP EDGES OR BURRS. USE CARE AND WEAR PROTECTIVE

CLOTHING AND GLOVES WHEN HANDLING

PARTS.

Figure 1: Heater Installation

Heater Support Rod Fits into Hole

Rotate Circuit Breakers 180 Degrees

for RH Airow

Representative drawing only, some models may vary in appearance.

IOM, XT Models Enertech Global

Section 7: Auxiliary Heater Installation

Heater Installation

1. Shut OFF electrical power at unit disconnect switch or service panel.

2. Remove the upper front panel from unit. Locate and remove the blank ller plate from the

internal discharge plenum.

3. If unit is going to be used for right hand return

the circuit breakers will have to be removed

and rotated 180 degrees, so the OFF position will be DOWN when the cabinet is positioned on the right side. This is an NEC requirement. DO ONE BREAKER AT A TIME to make sure wires are reconnected properly. Loosen terminal screws

on the wires. Gently pull wires back from breaker. Remove screws securing the breaker and rotate 180 degrees, then reconnect the wires to breaker. Proper torque for terminal screws is 35 inch pounds.

4. Insert the heater into the cabinet opening as shown in Figure 1. YT models do not have the

back side plenum bracket previously used on XT and CT models. Exercise caution to prevent

damage to heater element.

5. Secure the electric heat accessory with four screws.

6. Connect the 6-Pin heater wiring harness to the receptacle located inside the cabinet (Top Cover). A perfect match and positive connection must be made between the plug and receptacle. The plug will interlock with receptacle when properly seated. Harness contains 24 Volts wiring.

7. Route unit power supply through knockout in top of unit and connect to line side of disconnect. Connect ground wire to ground lug. See wiring diagram label to make connections. All line voltage connections and ground connections MUST be made with copper wire. supply wiring MUST have overcurrent protection. This can be either fuses or circuit breakers. The maximum size for the overcurrent protection is

shown in the column labeled “Max. Fuse or NEC

HACR Breaker (Amps)” in the electrical Data Table or on the unit rating plate. Connect supply voltage wires to the Circuit Breakers on the heater or to the terminal block on the heater.

The power

NOTE: Supply voltage, amperage, fuse and disconnect switch sizes MUST conform with all

technical specications in this manual and on the

unit rating plate.

1. Permanently ground the electric heat accessory in accordance with local codes and ordinances and in the United States with National Electrical Code ANSI/NFPA70-2008 or current edition. Use a copper conductor of the appropriate size from the electric heat accessory ground lug, to a grounding lug on the circuit breaker

panel. On models with more than one circuit,

a separate copper ground wire MUST be connected for each circuit. Install top front door panel.

2. The time delay module stages the heater elements for 15kW and 20kW heaters. In most

cases, the time adjustment knob should be

turned all the way to the right, providng approximately 10 minutes of delay between the

rst and second stage of electric heat.

3. Airow requirements are different between models. Please refer to the unit Installation

Instructions for airow set-up information.

4. Temperature rise is the difference between the supply and return air temperatures.

NOTE: The maximum outlet air temperature for all models is 200 Degrees F (93.3 Degree C).

NOTE: Supply voltage, amperage, fuse and disconnect switch sizes MUST conform with all

technical specications in this manual and on the

unit rating plate.

⚠ WARNING ⚠

ELECTRICAL SHOCK HAZARD

THE UNIT CABINET MUST HAVE AN

UNINTERRUPTED OR UNBROKEN GROUND TO

MINIMIZE PERSONAL INJURY IF AN ELECTRICAL

FAULT SHOULD OCCUR. THE GROUND MAY

CONSIST OF ELECTRICAL WIRE OR METAL

CONDUIT WHEN INSTALLED WITH EXISTING

ELECTRICAL CODES.

Enertech Global IOM, XT Models

Section 7: Auxiliary Heater Installation

20D237‐03NN:XTElectricalData

Volts Phase LRA RLA

208/230 1 58.3 11.7 3.9 0.0 0.0 15.6 18.5 30

208/230 1 58.3 11.7 3.9 0.5 0.0 16.1 19.0 30

208/230 1 58.3 11.7 3.9 0.0 4.0 19.6 22.5 30

208/230 1 58.3 11.7 3.9 0.5 4.0 20.1 23.0 35

208/230 3 55.4 6.5 3.9 0.0 0.0 10.4 12.0 15

208/230 3 55.4 6.5 3.9 0.5 0.0 10.9 12.5 15

30/35

460 3 28.0 3.5 3.2 0.0 0.0 6.7 7.6 10

208/230 1 83.0 15.6 3.9 0.0 0.0 19.5 23.4 35

208/230 1 83.0 15.6 3.9 0.5 0.0 20.0 23.9 40

208/230 1 83.0 15.6 3.9 0.0 4.0 23.5 27.4 40

208/230 1 83.0 15.6 3.9 0.5 4.0 24.0 27.9 40

208/230 3 73.0 11.6 3.9 0.0 0.0 15.5 18.4 30

208/230 3 73.0 11.6 3.9 0.5 0.0 16.0 18.9 30

30/35

460 3 38.0 5.7 3.2 0.0 0.0 8.9 10.3 15

208/230 1 104.0 21.2 5.2 0.0 0.0 26.4 31.7 50

208/230 1 104.0 21.2 5.2 0.5 0.0 26.9 32.2 50

208/230 1 104.0 21.2 5.2 0.0 5.5 31.9 37.2 50

208/230 1 104.0 21.2 5.2 0.5 5.5 32.4 37.7 50

208/230 3 83.1 14.0 5.2 0.0 0.0 19.2 22.7 35

208/230 3 83.1 14.0 5.2 0.5 0.0 19.7 23.2 35

30/35

460 3 41.0 6.4 4.7 0.0 0.0 11.1 12.7 15

208/230 1 152.9 27.1 6.9 0.0 0.0 34.0 40.8 60

208/230 1 152.9 27.1 6.9 0.5 0.0 34.5 41.3 60

208/230 1 152.9 27.1 6.9 0.0 5.5 39.5 46.3 70

208/230 1 152.9 27.1 6.9 0.5 5.5 40.0 46.8 70

208/230 3 110.0 16.5 6.9 0.0 0.0 23.4 27.5 40

208/230 3 110.0 16.5 6.9 0.5 0.0 23.9 28.0 45

30/35

460 3 52.0 7.2 6.0 0.0 0.0 13.2 15.0 20

208/230 1 179.2 29.7 6.9 0.0 0.0 36.6 44.0 70

208/230 1 179.2 29.7 6.9 0.5 0.0 37.1 44.5 70

208/230 1 179.2 29.7 6.9 0.0 5.5 42.1 49.5 70

208/230 1 179.2 29.7 6.9 0.5 5.5 42.6 50.0 80

208/230 3 136.0 17.6 6.9 0.0 0.0 24.5 28.9 45

208/230 3 136.0 17.6 6.9 0.5 0.0 25.0 29.4 45

30/35

460 3 66.1 8.5 6.0 0.0 0.0 14.5 16.6 25

XT048

XT060

XT072

Model

Voltage

Code/ HWG

Option

60 Hz Power Compressor

Fan

Motor

FLA

HWG

Pump

FLA

Ext.

Loop

Pump

FLA

Total

Unit FLA

Min Circuit AMPS

Notes:

1. All line and low voltage wiring must adhere to the National Electrical Code and local codes, whichever is the most stringent.

2. In determining the correct supply wire size and maximum length, reference NFPA 70, Section 310. If the calculation is close to the maximum allowable ampacity of a particular wire size, use the next size up. This will ensure that no adverse effects occur, such as light dimming and/or shortened compressor life.

3. All fuses class RK-5.

4. Min/Max Voltage: 208/230/60 = 187-252, 460/60 = 432-504

5. See Wiring Diagrams for proper 460V power. *The external loop pump FLA is based on a maximum of three UP26-116F-230V pumps (1/2hp) for 048-072 and two pumps for 024-036.

XT024

XT036

Max

Fuse

HACR

Heater Electrical Data

IOM, XT Models Enertech Global

Section 8: Electrical Connections

(LABEL 1A)

*SEE NOTE 1

NOTE :

(LABEL 1A)

Top View

Control Box

Air Coil

Side

High Voltage

Wiring Inputs for

Auxiliary Heater

High Voltage Single Phase Control Box Connections

NEED TO KEEP THIS GROUNDING LUG OPEN FOR FIELD GROUNDING CONDUCTOR!

Power Source

L1 L2

High Voltage Three Phase Control Box Connections

NOTE :

NEED TO KEEP THIS GROUNDING LUG OPEN FOR FIELD GROUNDING CONDUCTOR!

Power

Source

L1 L2 L3

Auxiliary Heater High Voltage Wiring Entry Locations

Refer to Heater Installation and Operations Manual

(20D156-01NN) for installation details

Enertech Global IOM, XT Models

Section 9: Controls

Microprocessor Features and Operation

Enertech Global geothermal heat pump controls provide a unique modular approach for controlling heat pump operation. The control system uses one, two, or three printed circuit boards, depending upon the features of a particular unit. This approach

simplies installation and troubleshooting, and

eliminates features that are not applicable for some units.

A microprocessor-based printed circuit board controls the inputs to the unit as well as outputs for

status mode, faults, and diagnostics. A status LED and an LED for each fault is provided for diagnostics. An ECM control module provides eld selectable options for airow and dehumidication mode, plus an LED to indicate CFM (100 CFM per ash).

Removable low voltage terminal strips provide all

necessary terminals for eld connections. Not only

are the thermostat inputs included, but there are also two additional removable terminal strips for all of the accessory and electric heat wiring for ease of installation and troubleshooting.

Startup/Random Start

The unit will not operate until all the inputs and safety controls are checked for normal conditions.

At rst power-up, the compressor is energized after a ve minute delay. In addition, a zero to sixty second random start delay is added at rst power-up to

avoid multiple units from being energized at the same time.

Water Solenoid Valve Connections

Two accessory relay outputs at the terminal strip

provide a eld connection for two types of water

solenoid valves, a standard 24VAC solenoid valve, or a 24VAC solenoid valve with an end switch.

Additional eld wiring is no longer required for

operation of the end switch.

Humidier/Dehumidication Connections

Connections for a humidistat are provided, which automatically engages the fan when the humidistat

contact closes. In addition, a eld connection is

provided at the terminal strip for external control of

the On Demand Dehumidication (ODD) feature for

the variable speed ECM motor, which automatically lowers the fan speed when the space humidity is higher than set point. Either connection may be

used with a thermostat that includes humidier/ dehumidication outputs. Not applicable for splits/

water-to-water.

Airow Monitor

An LED on the ECM control module ashes one time

per 100 CFM when the unit’s fan is operating to

indicate airow.

Resistance Heat Control

The electric heat control module contains the

appropriate high-voltage control relays. Low

voltage control signals from the compressor section energize the relays in the electric heat module to engage backup electric heat when necessary.

Short Cycle Protection

A built-in ve minute anti-short cycle timer provides short cycle protection of the compressor.

Component Sequencing Delays

Components are sequenced and delayed for optimum space conditioning performance and to make any startup noise less noticeable.

Test Mode

The microprocessor control allows the technician to shorten most timing delays for faster diagnostics by

changing the position of a jumper located on the

lockout board.

IOM, XT Models Enertech Global

Electronic Condensate Overow Protection

The control board utilizes an impedance sensing liquid sensor at the top of the drain pan. Since the drain pan is grounded, when water touches the sensor for 30 continuous seconds, the sensor sends a ground signal to the lockout board, indicating that a

condensate overow fault has occurred.

Loop Pump Circuit Breakers

The loop pump(s) and desuperheater pump are protected by control box mounted circuit breakers for easy wiring of pumps during installation. Circuit breakers eliminate the need to replace fuses.

Section 9: Controls

ECM

Board

Figure 13: ECM Board Layout

24VAC

COM2

XFMR

SEC

COM

CFM

O/B Y1 G W1 R ODD W2 Y2 C

Safety Controls

The control receives separate signals for high

pressure, low pressure, low water ow, and condensate overow faults. Upon a continuous

30-second measurement of the fault (immediate for high pressure), compressor operation is suspended

(see Fault Retry below), and the appropriate LED ashes. Once the unit is locked out (see Fault Retry below), an output (terminal “L”) is made available to a fault LED at the thermostat.

Low Pressure: If the low pressure switch is open for 30 continuous seconds, the compressor operation will be interrupted, and the control will go into fault retry mode. At startup, the low pressure switch is not monitored for 90 seconds to avoid nuisance faults.

High Pressure: If the high pressure switch opens, the compressor operation will be interrupted, and the control will go into fault retry mode. There is no delay from the time the switch opens and the board goes into fault retry mode. There is also no delay of switch monitoring at startup.

Flow Switch: If the ow switch is open for 30

continuous seconds, the compressor operation will be interrupted, and the control will go into fault retry

mode. At startup, the ow switch is not monitored

for 30 seconds to avoid nuisance faults.

Condensate Overow: If water touches the

condensate overow sensor for 30 continuous

seconds, the compressor operation will be interrupted, and the control will go into fault retry mode. There is no delay of switch monitoring at startup.

Fault Retry

All faults are retried twice before nally locking the

unit out. The fault retry feature is designed to prevent nuisance service calls. There is an anti-short cycle

(ASC) period (5 min.) between fault retries. On the

third fault within 30 minutes, the board will go into

lockout mode and the “Call For Service” indicator

on the thermostat will illuminate.

Intelligent Lockout Reset

If the thermostat is powered off then back on (soft reset), the board will reset and the last fault will be stored in memory for ease of troubleshooting. If power is interrupted to the board, the fault memory will be cleared.

Over/Under Voltage Protection

The lockout board protects the compressor from operating when an over/under voltage condition exists. The control monitors secondary voltage (24VAC) to determine if an over/under voltage condition is occurring on the primary side of the transformer. For example, if the secondary voltage is 18VAC, the primary voltage for a 240V unit would be approximately 180V, which is below the minimum voltage (197V) recommended by the compressor manufacturer. Under voltage (<18VAC) causes the compressor to disengage and restart when the

voltage returns to >20VAC. Over voltage (>31VAC)

causes the compressor to disengage and restart when the voltage returns to <29VAC.

When an O/U Voltage condition occurs, the board

will initiate a fault, shut down the compressor, and

start the ve minute ASC period. All four fault LEDs will ash (HP + LP + FS + CO) and the thermostat “Call For Service” indicator will be illuminated. This

feature is self-resetting. If voltage returns to normal range normal operation will resume if/when the ASC period is over (except if in lockout mode). If voltage is still out of range at the end of the ASC period the

control will execute a Fault Retry. On the third fault

within 30 minutes, the board will go into lockout

mode and illuminate the “Call For Service” indicator.

When normal operation is restored the four fault

LED’s will stop ashing and the “Call For Service”

indicator will turn off.

Enertech Global IOM, XT Models

Section 9: Controls

Lockout with Emergency Heat

While in lockout mode, if the thermostat is calling for backup heat, emergency heat mode will occur.

Diagnostics

The lockout board includes ve LEDs (status, high pressure, low pressure, low water ow, condensate overow) for fast and simple control board diagnosis. Below is a table showing LED function.

Lockout Board LED Identication

LED Color Location

Green To p High Pressure OFF Flashing

Orange 2nd Low Pressure OFF Flashing

Red 3rd Water Flow OFF Flashing

Yellow 4th

Green Bottom Status Flashing

Notes:

1. Looking at the board when the LEDs are on the right hand side.

2. If all ve lights are ashing, the fault is over/under voltage.

3. Only the light associated with the particular fault/lockout will be on or ashing.

For example, if a high pressure lockout has occurred, the top green light will be on. The orange, red, and yellow lights will be off.

4. Status lights will be off when in test mode.

5. Flashes alternately with the fault LED.

Hot Water Pump Control

Controls for high water temperature and low compressor discharge line temperature prevent the hot water (desuperheater) pump from operating when the leaving water temperature is above 130°F, or when the compressor discharge line is too cool to provide adequate water heating.

Lockout Board Jumper Selection

The lockout board includes three jumpers for eld

selection of various board features.

Water Solenoid Valve Delay (WSD): When the WSD

jumper is installed, the “A” terminal is energized 10

seconds before the compressor is energized. When

the jumper is removed, the “A” terminal is energized

with the compressor. If using a water solenoid valve

without an end switch, connect to terminal “A”. If

using a water solenoid valve with an end switch,

connect to terminals YT and YU(remove the jumper

wire). Refer to wiring diagram. Enertech recommends the use of a slow acting valve to reduce the chance of water hammer.

Test Mode (TEST): When the TEST jumper is installed,

the board operates in the normal mode.

Function Normal Operation Fault Retry

Condensate

Overow

OFF Flashing

When the jumper is removed, the board operates

in test mode, which speeds up all delays for easier troubleshooting. When service is complete, the

jumper must be re-installed in order to make sure

that the unit operates with normal sequencing

delays. While the test jumper is removed, the status

light (bottom green) will remain off.

Over/Under Voltage Disable (O/V): When the

O/V jumper is installed, the over/under voltage feature is active. When the jumper is removed, the over/under voltage feature is disabled. On rare

occasions, variations in voltage will be outside the range of the over/under voltage feature, which may

require removal of the jumper. However, removal of the jumper could cause the unit to run under

adverse conditions, and therefore should not be removed without contacting technical services. An over/under voltage condition could cause premature component failure or damage to the unit controls. Any condition that would cause this fault must be thoroughly investigated before taking

any action regarding the jumper removal. Likely

causes of an over/under voltage condition include

power company transformer selection, insufcient

entrance wire sizing, defective breaker panel, incorrect transformer tap (unit control box), or other power-related issues.

Flashing

Lockout

Flashing

IOM, XT Models Enertech Global

Section 9: Controls

Sequence of Operation

Water-to-Air Units, Single Compressor, ECM Fan

Heating, 1st Stage (Y1,G) Two-Stage Units

The ECM fan is started immediately at 75% (of 1st stage operation) CFM level (based on DIP switch

settings), rst stage compressor and the loop/

desuperheater pump(s) are energized 10 seconds

after the “Y1” input is received, and the ECM fan adjusts to 100% (of 1st stage operation) CFM level 30 seconds after the “Y1” input.

Heating, 2nd Stage (Y1,Y2,G) Two-Stage Units

The ECM fan adjusts to 2nd stage CFM level (based

on DIP switch settings), and the compressor full load solenoid valve is energized.

Heat, 3rd Stage (Y1,Y2,W,G) Two-Stage Units The ECM fan remains at 100% of 2nd stage CFM level

(based on DIP switch settings)

backup heat is energized.

Emergency Heat (W,G)

The fan is started immediately at 2nd stage CFM level (based on DIP switch settings), and the electric backup heat is energized.

Cooling Operation

The reversing valve is energized for cooling

operation. Terminal “O” from the thermostat is

connected to the reversing valve solenoid.

Cooling, 1st stage (Y1,0,G) Two-Stage Units

The ECM fan is started immediately at 75% (of 1st stage operation) CFM level (based on DIP switch

settings), rst stage compressor and the loop/

desuperheater pump(s) are energized 10 seconds

after the “Y1” input is received, and the ECM fan adjusts to 100% (of 1st stage operation) CFM level 30 seconds after the “Y1” input.

, and the electric

Figure 14: Lockout Board Layout

CCG

R2 R1 C2 C1

Lockout

Board

HP HP LP LP

A C R Y

WSD TEST O/V

FS FS CO CO

module is set to Forced Dehumidication mode, the

ECM fan runs at normal CFM in all heating stages, but all cooling operation will be 85% of the current stage CFM level (based on DIP switch settings), which lowers the CFM through the evaporator

coil, improving latent capacity. In ODD mode, a humidistat or a thermostat with a dehumidication

output (output must be reverse logic -- i.e. it must operate like a humidistat) is connected to the

ODD terminal. When the module receives a call for dehumidication, the fan runs at 85% of the current stage CFM in the cooling mode. Otherwise, the airow is at the normal CFM level. The signal is

ignored in the heating mode.

Fan Only

When the ECM control module receives a “G”

call without a call for heating or cooling, the fan operates at a lower CFM level (based on DIP switch settings).

Status

Cooling, 2nd Stage (Y1,Y2,O,G) Two-Stage Units

The ECM fan adjusts to 2nd stage CFM level (based

on DIP switch settings), and the compressor full load solenoid valve is energized.

Cooling, Dehumidication Mode

The ECM control module includes two types of

dehumidication modes, Forced Dehumidication mode, and On Demand Dehumidication (ODD). If

the ECM control

Enertech Global IOM, XT Models

Section 10: Wiring Diagrams

Two Stage, ECM, Single Phase, 208/230V, 60HZ

IOM, XT Models Enertech Global

Section 10: Wiring Diagrams

Two Stage, ECM, Three Phase, 208/230V, 60HZ

Enertech Global IOM, XT Models

Section 10: Wiring Diagrams

Two Stage, ECM, Single Phase, 460V, 60HZ

IOM, XT Models Enertech Global

Section 11: Equipment Start-Up Procedures

Equipment Start-Up Process

Check the following before power is applied to the equipment

Caution: Do not start-up the unit until the new structure is ready to be occupied

*500 = Constant factor for pure water.

Brine should be 485.

Electrical:

Brine should be 485.

 Geothermal unit high voltage

wiring is installed correctly

 Geothermal unit high voltage

wiring and breaker are the correct size

 Auxiliary electric heaters are

wired and installed correctly

 Circulating pumps are wired and

fused (if necessary) correctly

 Desuperheater pump is NOT

wired, unless piping is complete and all air is purged

 Low voltage wiring is correct and

completely installed

Plumbing:

 Pipe and pump sizes are correct  Air is purged from all lines  Antifreeze is installed  All valves are open, including

those on the flow center

 Condensate is trapped and piped

to the drain

Ductwork:

 Filter is installed and clean  Packaging is removed from the

blower assembly

 Blower turns freely  Canvas connections installed on

supply plenum & return drop

Equipment Start-Up

1. Energize geothermal unit with

high voltage.

2. Set the thermostat to “Heat” or “Cool.” Adjust set point to energize the unit. System will energize after delays expire (typically a five minute delay).

3. Check water flow with a flow meter (non-pressurized) or pressure drop conversion (pressurized). Pressure drop tables must be used to convert the pressure drop to GPM. The pressure drop can be obtained by checking water pressure in and water pressure out at the P/T ports.

4. Check the geothermal unit’s electrical readings listed in the Unit Electrical Data table.

5. Check the source water temperature in and out at the P/T ports (use insertion probe). Allow 10 minutes of operation before recording temperature drop.

6. Calculate the heat of extraction or heat of rejection.

7. Check the temperature difference of the load coax (water-to-water) or air coil (water-to-air). P/T ports are recommended for use on the load side, but the line temperatures can be used to check the temperature difference.

8. Change the mode of the thermostat and adjust the set point to energize the unit. Check the data in opposite mode as the previous tests. Amp draws as well as temperature differences and flow rate should be recorded.

9. Check auxiliary heat operation by adjusting the thermostat set point 5°F above the room temperature in “Heat” mode or set thermostat to “Emergency." Record voltage, amperage, and air temperature difference.

EQUIPMENT START-UP FORM

Unit Electrical Data

Loop Type: Open Closed

(Circle One)

Line Voltage

Wire Size

Circuit Breaker Size

Cooling

Heating

Cooling

Heating

Flow Rate

*Check pressure drop chart for GPM

Total Unit Amps

Compressor Amps

Flow Rate

Source Water Pressure In

Source Water Pressure Out

Source Water Pressure Drop

BTU/HR

Source Water Temp. Difference

Cooling

Heating

Source Water Temperature In

Source Water Temperature Out

Source Water Temperature Difference

Cooling

Heating

Load Water Temp. Difference

Cooling

Heating

Heat of Extraction/Rejection = GPM X Water Temp. Difference X 485 (Water & Antifreeze - Closed Loop)

Heat of Rejection

Heat Of Extraction

Load Water Temperature In

Load Water Temperature Out

Load Water Temperature Difference

Heat of Extraction/Rejection = GPM X Water Temp. Difference X 500 (Water - Open Loop)

Air Temperature Difference

Supply Air Temperature

Return Air Temperature

Air Temp. Difference

Auxiliary Heat Operation Only

Supply Air Temperature

*Confirm auxiliary heaters are de-energized for the above readings.

Return Air Temperature

Air Temp. Difference

Auxiliary Heat Electrical Data

CFM = (Watts X 3.413) ÷ (Air Temp. Difference X 1.08)

Watts = Volts X Auxiliary Heater Amps

Line Voltage

Total Amperage (Full kW - All Stages)

Wire Size

Breaker Size

Section 11: Equipment Start-Up Procedures

Equipment Start-Up Form

Customer Name:_________________________________________________________________

Customer Address:_____________________________________________________________________________________

Model #:__________________________________________ Serial #:____________________________________________

Dealer Name:__________________________________________________________________________________________

Distributor Name:_____________________________________________ Start-up Date:____________________________

PSI PSI V PSI PSI A A PSI PSI A A GPM GPM GA

ºF ºF ºF ºF ºF ºF

Heat of Rejection/Extraction

BTU/HR

ºF ºF ºF ºF ºF ºF

Cooling Heating

ºF ºF ºF ºF ºF ºF

Heating

ºF ºF ºF

Heating

V A

Installer/Technician:____________________________________________ Date:________________________

Section 11: Equipment Start-Up Procedures

Performance Check

Heat of Extraction(HE)/Rejection(HR)

Record information on the Equipment Start-up Form

Equipment should be in full load operation for a minimum of 10 minutes in either mode – WITH THE

HOT WATER GENERATOR TURNED OFF.

1. Determine ow rate in gallons per minute

a. Check entering water temperature b. Check entering water pressure c. Check leaving water pressure

Once this information is recorded, nd

corresponding entering water temperature column

in Specication Manual for unit.

Find pressure differential in PSI column in Spec Manual. Then read the GPM column in Spec Manual

to determine ow in GPM.

2. Check leaving water temperature of unit.

FORMULA: GPM x water temp diff, x 500 (antifreeze)

or 500 (fresh water) = HE or HR in BTU/HR

A 10% variance from Spec Manual is allowed. Always use the same pressure gauge & temperature measuring device.

Water ow must be in range of Specication Manual. If system has too much water ow,

performance problems should be expected.

Enertech Global IOM, XT Models

Section 12: Troubleshooting

QR Code Troubleshooting and Installation Videos

Select the topic for your maintenance need. Scan the QR code to access the video. Follow the directions and tips provided to make the

project easier to complete

Heat Of Extraction and Rejection

ECM Temporary Motor Replacement

ECM Motor Troubleshooting

Troubleshooting a TXV

Compressor Troubleshooting

Measuring Subcooling and Superheat

Variable Speed Flow Centers

Return Conversion for and XT or CT

IOM, XT Models Enertech Global

Section 12: Troubleshooting

Compressor Troubleshooting Tips

COMPRESSOR WON’T START

Check for proper compressor nameplate voltage.

Attempt to restart the compressor

Does Compressor draw

current when voltage is applied.

Check voltage supply

& contactor operation.

Is the compressor hot?

Allow time for the protector to reset.

Recheck Resistance

Replace Compressor

Yes

Not OK

Are the suction &

Yes

discharge pressures

balanced.

Check motor

resistance.

(See Note B)

Not OK

Yes

Allow time for compressor to balance.

Voltage supply is too low.

Compressor Connection Block

Single Phase 208-230 C = Line Winding R = Run Winding S = Start Winding

Check the wiring, capacitor & contactor operation. (See Note A)

Allow to start the compressor while measuring voltage on the load side of the contactor.

Is the voltage 197 or higher when the compressor is trying to start.

Yes

If the compressor fails to start after 3 attempts, replace the compressor.

A: Check all terminals, wires & connections for loose or burned wires and connections. Check contactor and 24 Volt

coil. Check capacitor connections & check capacitor with capacitor tester.

B: If ohm meter reads 0 (short) resistance from C to S, S to R, R to C or from anyone of one of these terminals to

ground (shorted to ground), compressor is bad.

COMPRESSOR WON’T PUMP

Is th e c om pr esso r ru n n ing?

N o

R ef er t o th e c om p re sso r

w on 't s tart fl ow ch ar t.

M ea su re & r eco r d

Y es Y es

th e a m p s, volts , su c ti on & d isch a rg e

p ress u r e .

D oe s th e u ni t

O K

h av e a r e frig e ra n t c h ar g e ?

A dd r e frige ra nt to t h e sy st e m .

If th e co m p re sso r s till w o n't pum p re p lace co m p r e ssor .

N o

S hut t h e unit d ow n & re v e rs e the p ha sin g (3 -P hase O n ly)

C heck & v er ify th e r un c ap acito r

C heck th e ope ra tion o f t he re ve rs ing

O K

v a lv e .

O K

Enertech Global IOM, XT Models

Section 12: Troubleshooting

Troubleshooting Tips

UNIT WILL NOT START IN EITHER CYCLE

Set thermostat on heating and highest temperature setting. Unit should run. Set thermostat on cooling and

Thermostat

Loose or broken wires Tighten or replace wires.

Blown Fuse/ Tripped Circuit Breakers

Low Voltage Circuit

lowest temperature setting. Unit should run. Set fan to On position. Fan should run. If unit does not run in any position, disconnect wires at heat pump terminal block and jump R, G, Y. Unit should run in heating. If unit runs, replace thermostat with correct thermostat only.

Check fuse size, replace fuse or reset circuit breaker. Check low voltage circuit breaker.

Check 24 volt transformer. If burned out or less than 24 volt, replace. Before replacing, verify tap setting and correct if necessary.

BLOWER RUNS BUT COMPRESSOR WILL NOT START (COMPRESSOR OVERLOAD, CAPACITOR BLOWN, HP FAULT)

Logic Board Check if logic board is working properly. Check status light for fault. See board imprint for blink faults.

Flow Switch

Defective capacitor Check capacitor. If defective, replace.

Frozen Compressor See charts O and P for compressor diagnostic. If compressor still doesn’t run, replace it.

Temporarily bypass ow switch until compressor starts. If compressor runs properly, check switch. If

defective, replace. If switch is not defective, check for air in loop system. Make sure loop system is

properly purged. Verify ow rate before changing switch.

BLOWER RUNS BUT COMPRESSOR SHORT CYCLES OR DOES NOT RUN

Wiring Loose or broken wires. Tighten or replace wires. See A: Unit will not start in either cycle.

Blown Fuse

Flow Switch

Water Flow

High or low pressure switches

Defective logic board relay Jump or bypass relay. If defective, replace.

Low refrigerant charge Check for leaks and x leaks.

Check fuse size. Check unit nameplate for correct sizing. Replace fuse or reset circuit breaker. Check low voltage circuit breaker.

Temporarily bypass ow switch for a couple seconds. If compressor runs properly, check switch. If

defective, replace. If switch is not defective, check for air in loop system. Make sure loop system is

properly purged. Verify ow rate before changing switch. .

If water ow is low (less than 3.5 GPM), unit will not start. Make sure Pump Module or solenoid valve is connected (see wiring diagram). Water has to ow through the heat exchanger in the right direction (see labels at water tting connections) before the compressor can start. If water ow is at normal ow, use an ohmmeter to check if you get continuity at the ow switch. If no switch is open and ow is a normal ow,

remove switch and check for stuck particles or bad switch.

If heat pump is out on high or low-pressure cutout (lockout), check for faulty switches by jumping the

high and low-pressure switches individually. If defective replace. Check airow, lters, water ow, loss of

refrigerant and ambient temperature. WARNING: Only allow compressor to run for a couple of seconds with the high pressure switch jumpered

NOISY BLOWER AND LOW AIR FLOW

Noisy Blower

Low air ow

Blower wheel contacting housing—Readjust. Foreign material inside housing—Clean housing. Loose duct work—Secure properly.

Check speed setting, check nameplate or data manual for proper speed, and correct speed setting.

Check for dirty air lter—Clean or replace; obstruction in system—Visually check.

Balancing dampers closed, registers closed, leaks in ductwork. Repair. Ductwork too small. Resize ductwork.

UNIT RUNNING NORMAL, BUT SPACE TEMPERATURE IS UNSTABLE

Thermostat

IOM, XT Models Enertech Global

Thermostat is getting a draft of cold or warm air. Make sure that the wall or hole used to run thermostat wire from the ceiling or basement is sealed, so no draft can come to the thermostat. Faulty Thermostat (Replace).

Section 12: Troubleshooting

Troubleshooting Tips

NO WATER FLOW

Make sure Pump Module is connected to the control box relay (check all electrical connections). For non-

Pump Module

Solenoid valve Make sure solenoid valve is connected. Check solenoid. If defective, replace.

pressurized systems, check water level in Pump Module. If full of water, check pump. Close valve on the

pump anges and loosen pump. Take off pump and see if there is an obstruction in the pump. If pump is

defective, replace. For pressurized systems, check loop pressure. Repressurize if necessary. May require

re-ushing if there is air in the loop.

IN HEATING OR COOLING MODE, UNIT OUTPUT IS LOW

Water Water ow & temperature insufcient.

Airow

Refrigerant charge

Reversing valve

Heat pump will not cool but will heat. Heat pump will not heat but will cool.

Water heat exchanger

System undersized Recalculate conditioning load.

Check speed setting, check nameplate or data manual for proper speed, and correct speed setting.

Check for dirty air lter—Clean or replace.

Restricted or leaky ductwork. Repair.

Refrigerant charge low, causing inefcient operation. Make adjustments only after airow and water ow

are checked.

Defective reversing valve can create bypass of refrigerant to suction side of compressor. Switch reversing valve to heating and cooling mode rapidly. If problem is not resolved, replace valve. Wrap the valve with a wet cloth and direct the heat away from the valve. Excessive heat can damage the valve. Always use dry

nitrogen when brazing. Replace lter/drier any time the circuit is opened.

Reversing valve does not shift. Check reversing valve wiring. If wired wrong, correct wiring. If reversing valve is stuck, replace valve. Wrap the valve with a wet cloth and direct the heat away from the valve.

Excessive heat can damage the valve. Always use dry nitrogen when brazing. Replace lter/drier any time

the circuit is opened.

Check for high-pressure drop, or low temperature drop across the coil. It could be scaled. If scaled, clean with condenser coil cleaner.

WATER HEAT EXCHANGER FREEZES IN HEATING MODE

Water ow Low water ow. Increase ow. See F. No water ow.

Flow Switch Check switch. If defective, replace.

EXCESSIVE HEAD PRESSURE IN COOLING MODE

Inadequate water ow Low water ow, increase ow.

EXCESSIVE HEAD PRESSURE IN HEATING MODE

Low air ow See E: Noisy blower and low air ow.

AIR COIL FREEZES OVER IN COOLING MODE

Air ow See E: Noisy blower and low air ow.

Blower motor

Panels Panels not in place.

Low air ow See E: Noisy blower and low air ow.

WATER DRIPPING FROM UNIT

Unit not level Level unit.

Condensation drain line plugged

Water sucking off the air coil in cooling mode

Water sucking out of the drain pan

Motor not running or running too slow. Motor tripping off on overload. Check for overheated blower motor and tripped overload. Replace motor if defective.

Unplug condensation line.

Too much airow. Duct work not completely installed. If duct work is not completely installed, nish duct work. Check static pressure and compare with air ow chart in spec manual under specic models section.

If ductwork is completely installed it may be necessary to reduce CFM.

Install an EZ-Trap or P-Trap on the drain outlet so blower cannot suck air back through the drain outlet.

Enertech Global IOM, XT Models

Section 12: Troubleshooting

Refrigeration Troubleshooting Form

Customer/Job Name:____________________________________________ Date:________________________________

Model #:__________________________________________ Serial #:____________________________________________

Antifreeze Type:____________________________________

HE or HR = GPM x TD x Fluid Factor (Use 500 for water; 485 for antifreeze)

SH = Suction Temp. - Suction Sat. SC = Disch. Sat. - Liq. Line Temp.

Return Air

Heating

Mode

°F

Air Coil

Suction

Discharge

Liquid line (heating)

Air Coil

Coax

°F

Supply Air

Reversing

Valve

°F

Air Coil

Suction

Discharge

To suction line bulb

TXV

installed in discharge line

(always disconnect during

Coax

Cooling

Mode

Liquid line (cooling)

To suction line

Optional desuperheater

troubleshooting)

°F

Suction Line

psi

Discharge Line

Filter Drier

psi

(saturation)

Suction temp

(saturation)

°F

psi

Source (loop) IN

GPM

Source

Coax

IOM, XT Models Enertech Global

°F

psi

Source (loop) OUT

Section 12: Troubleshooting

NEUTRAL OR GROUND

Proper Power Supply Evaluation

⚠ CAUTION ⚠

CHECK COMPRESSOR AMP DRAW TO VERIFY

COMPRESSOR ROTATION ON THREE PHASE UNITS.

COMPARE AGAINST UNIT ELECTRICAL TABLES.

REVERSE ROTATION RESULTS IN HIGHER SOUND

LEVELS, LOWER AMP DRAW, AND INCREASED

COMPRESSOR WEAR. THE COMPRESSOR INTERNAL

OVERLOAD WILL TRIP AFTER A SHORT PERIOD OF

OPERATION.

Example 1: WYE (STAR) Electrical Circuit Example 2: DELTA Electrical Circuit

When any compressor bearing unit is connected to a weak power supply, starting current will generate

a signicant “sag” in the voltage which reduces

the starting torque of the compressor motor and

increases the start time. This will inuence the rest of

the electrical system in the building by lowering the voltage to the lights. This momentary low voltage

causes “light dimming”. The total electrical system

should be evaluated with an electrician and HVAC technician. The evaluation should include all connections, sizes of wires, and size of the distribution panel between the unit and the utility’s connection. The transformer connection and sizing should be evaluated by the electric utility provider.

NEUTRAL OR GROUND

⚠ CAUTION ⚠

ALL VOLTAGE CODE “3” 460V UNITS UTILIZE A 277V

ECM MOTOR WHICH REQUIRES A NEUTRAL WIRE.

THE MOTORS ARE WIRED BETWEEN THE NEUTRAL

AND ONE HOT LEG OF THE CIRCUIT. SOURCE

WIRING MUST BE WYE (STAR) CONFIGURATION.

3-PHASE DELTA CONNECTIONS WILL NOT PROVIDE

THE CORRECT WIRING AND WILL CAUSE THE UNIT

NOT TO OPERATE.

Enertech Global IOM, XT Models

Model Number _________________________Serial Number __________________________ Install Date _______________

This unit is performing Satisfactorily Not Satisfactorily (please explain) _______________________________________

______________________________________________________________________________________________________

MAIL THIS FORM TO: EMAIL THIS FORM TO: FAX THIS FORM TO:

ENERTECH GLOBAL LLC WARRANTY@ENERTECHGEO.COM ENERTECH GLOBAL LLC 2506 SOUTH ELM STREET 618.664.4597 GREENVILLE, IL 62246

WARRANTY REGISTRATION

WARRANTY REGISTRATIONS SHOULD BE SUBMITTED WITHIN 60 DAYS OF INSTALLATION

NOW REGISTER ONLINE AT WARRANTY-REGISTRATION.ENERTECHGEO.COM

Purchaser/User Name _____________________________________________________ Phone ________________________

Address ____________________________________________ City __________________________ State/Prov _________

Postal Code ___________________ Email __________________________________________________________________

Installer Company Name ________________________________________________________________________________

City _____________________________State/Prov __________ Email ___________________________________________

Application

Residenal New Construcon Residenal Geo Replacement Residenal Replacement of Electric, Gas or Other

Mul-Family (Condo/Townhome/Mulplex) Commercial Other ___________________________________

Use

(check all that apply)

Space Condioning Domesc Water Heang Radiant Heat Swimming Pool Snow/Ice Melt

Other _____________________________________________________________________________________________

Loop Type

Horizontal Loop Vercal Loop Pond Loop Open Loop

Demographics

Household Income

Under $30,000 $30,000–$45,000 $45,000–$60,000 $60,000–$75,000 $75,000–$100,000 Over $100,000

Home Size

Up to 1500 sq. . 1501 to 2500 sq. . 2501 to 4000 sq. . Over 4000 sq. .

Home Locaon

Rural Urban Suburban

Value of Home

Less than $100,000 $100,000–$250,000 $250,000–$500,000 $500,000–$1 mil Over $1 mil

Customer Sasfacon

How would you rate your overall sasfacon with your new geothermal system?

1 (Very Dissased) 2 3 4 5 6 7 8 9 10 (Very Sased)

How would you rate your overall sasfacon with your installing geothermal contractor?

1 (Very Dissased) 2 3 4 5 6 7 8 9 10 (Very Sased)

Rev 30 DEC 2013B

Section 13: Warranty Forms

Warranty Registration

1) See warranty coverage summary sheet for labor allowances, conditions and exclusions, etc. 2) Warranty start date is ship date from Enertech facility unless proof of startup is presented. 3) Outsourced warranty replacement parts will be reimbursed in the form of credit for the part only. Credit will be no more than the standard equivalent part cost through Enertech. 4) Factory pre-approval is required for anything outside the scope of this document. 5) Fuses, hose kits and items not mentioned on Warranty Coverage Summary are not covered under this program.

COMPANY NAME ____________________________________________________ DAT E ___________________

PHONE _________________ FAX _________________ EMAIL ________________________________________

ORDERED BY _____________________________________ JOB NAME/PO # ____________________________

UNIT Model # _____________________________________ Serial # ____________________________________

FAILURE DATE ____________________

SHIP TO

HOMEOWNER ADDRESS

(Form submitter)

(If different

than

company)

OTHER NOTES _______________________________________________________________________________

____________________________________________________________________________________________

DO YOU NEED PARTS ORDERED?

(If no, and replacement was purchased from another vendor, attach copy of bill if reimbursement is needed

Required if claim is for defective ow center

FLOW CENTER MODEL # ________________________ FLOW CENTER SERIAL # __________________________

NO YES

SRO# _________________________________________ CREDIT MEMO# ________________________________

FOR ENERTECH COMPANIES USE ONLY

FAILURE CODES, DESCRIPTION AND LABOR REIMBURSEMENT

MUST BE FOUND IN WARRANTY MANUAL

FAILURE CODE DESCRIPTION PART NUMBER

____________ _________________________________________________

__________

____________ _________________________________________________

LABOR REIMBURSEMENT REQUESTED

NO YES

WARRANTY ORDER & CLAIM

ALL WARRANTY REGISTRATIONS SHOULD BE SUBMITTED WITHIN 10 DAYS OF INSTALLATION

PHONE : 618.664.9010 FAX : 618.664.4597 EMAIL : WARRANTY@ENERTECHGEO.COM

__________

____________

Section 13: Warranty Forms

Warranty Order & Claim

This Page Intentionally Left Blank

IOM, XT Models Enertech Global

Greenville, IL - Mitchell, SD

MEMBER

info@enertechgeo.com

Rev Tab

Enertech Global is continually working to improve its products. As a result, the price, design and specications of each product may change without notice and may not be as described herein. For the most up-to-date information, please visit our website, or contact our Customer Service department at info@enertechgeo.com. Statements and other information contained herein are not express warranties and do not form the basis of any bargain between the parties, but are merely Enertech Global’s opinion or commendation of its products.

Enertech Global, LLC 180406B20D218-03NN

Enertech XT024, XT048, XT036, XT060 Installation & Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual