EarthLinked HWM-18B, HWM-24B, HWM-30B, HWM-36B, HWM-48B Installation, Operation & Maintenance Manual

EarthLinked®

Hydronic Water Module

Installation, Operation & Main tenance Manual

for

R-407C Heat/Cool and Cool Only Systems

HWM-407CH-IOM (09/13) Copyright 2013 Earthlinked Technologies, Inc

Disclaimer

This manual contains inst ruc ti ons for the EarthLinked® Hydronic Water Module which is
combined with other EarthLinked® system components, field specified hydronic heating
and chilled water cooling components, thermostats, storage water heaters, storage water
tanks and associated fi tti ng s , control s an d pipi ng.

EarthLinked® Technologies manufactures and sells only the EarthLinked® system
components and the performance information contained herein is based on performanc e
of EarthLinked® Technologies’ supplied Products.

Therefore, EarthLinked® Technologies shall not be liable for any defect, unsatisfactory
performance, damage or loss, whether direct or consequential, relative to the design,
manufacture, construction, application or installation of the above mentioned field

specified items.

Proper installation and servicing of the EarthLinked® Heating and Cooling System is
essential to its reliable performance. All EarthLinked® systems must be install ed and
serviced by an authorized, trained technician who has successfully completed the
training class and passed the final examination. Installation and service must be made
in accordance with the instructions set forth in this manual and the current EarthLinked
Heating and Cooling Installation, Operation and Maintenance Manual. Failure t o provide
installation and service by an authorized, trained installer in a manner consistent with the
subject manuals will nullif y th e limited warranty coverage for the system.

tel. [phone] ● fax [phone]

[e-mail] ● www.earthlinked.com

HWM-407CH-IOM (09/13) Page 2

Earthlinked Technologies, Inc.

4151 South Pipkin Road
Lakeland, Florida 33811

CSI # 23 80 00

Table of Contents

1. Inspection/Pre-Installation ........................................................................................................ 5

A. Inspection ........................................................................................................................... 5

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

2. General System Layout ............................................................................................................ 7

3. Applications ............................................................................................................................. 8

4. The Primary Circuit ................................................................................................................ 10

A. Plumbing .......................................................................................................................... 10

B. Antifreeze Protection ........................................................................................................ 11

C. Water Quality ................................................................................................................... 13

D. Storage Water Heater Sizing and Connections ................................................................ 14

E. Circulating Pump, Piping, Strainer and Flowmeter ........................................................... 15

F. Ref rigerant Piping ............................................................................................................ 17

5. Controls and Electrical ........................................................................................................... 18

A. Hydronic Heating and Chilled Water Cooling .................................................................... 18

B. Chilled Water Cooling ....................................................................................................... 19

C. HWM Freeze Protection Thermostat ................................................................................ 21

6. Start-Up ................................................................................................................................. 22

7. Heat Exchanger Maintenance ................................................................................................ 24

8. Tools and Equipment ............................................................................................................. 28

Index ....................................................................................................................................... 29

HWM-407CH-IOM (09/13) Page 3

List of Figures

Figure 1. Matching Component Model Numbers ................................................................................ 5

Figure 2. General System Layout ...................................................................................................... 7

Figure 3. Typical Chilled Water Cooling and Radiant Panel Hydronic Heating System ...................... 8

Figure 4. Typical Chilled Water Cooling System ................................................................................ 9

®

Figure 5. Primary Circuit for EarthLinked

Figure 6. Typical HWM Primary Circuit Plumbing ............................................................................. 11

Figure 7. Propylene Glycol Freeze Protection Table ....................................................................... 12

Figure 8a. Hydronic System Water Quality Parameters ................................................................... 13

Figure 8b. Storage Tank Capacities and Pipe Sizes ........................................................................ 14

Figure 8c. Typical HWM Piping Illustration ....................................................................................... 15

Figure 9. Hydronic Water Module (HWM) ........................................................................................ 16

Figure 10a. Minimum Water Pipe, Fitting and Strainer Sizes to Storage Water Heater .................... 17

Figure 10b. Flowmeter Kit ................................................................................................................ 17

Figure 10c. (Part 1 of 2) Electrical Field Wiring –

Hydronic Heating and Chilled Water Cooling (HWM) .......................................................... 18

System with HWM .......................................................... 10

Figure 10c. (Part 2 of 2) Electrical Field Wiring –

Hydronic Heating and Chilled Water Cooling (HWM) .......................................................... 19

Figure 10d. (Part 1 of 2) Electrical Field Wiring – Chilled Water Cooling (HWM) ............................. 20

Figure 10d. (Part 2 of 2) Electrical Field Wiring – Chilled Water Cooling (HWM) .............................. 20

Figure 10e. Three-Step Electrical Installation for Freeze Protection Thermostat .............................. 21

Figure 11. Maximum Operating Conditions (R-407C) ...................................................................... 23

Figure 12. Minimum Heat Exchanger Water Flow Rates .................................................................. 24

Figure 13. Minimum Heat Exchanger Propylene Glycol/Water Solution Flow Rates ........................ 25

Figure 14. HWM Heat Exchanger Cleaning Set-up .......................................................................... 26

HWM-407CH-IOM (09/13) Page 4

1. Inspection/Pre-Installation

R-407C

MODULE MODEL

-018 (18,000 BTUH)

HWM-18B

-024 (24,000 BTUH)

HWM-24B

-030 (30,000 BTUH)

HWM-30B

-036 (36,000 BTUH)

HWM-36B

-042 (42,000 BTUH)

HWM-42B

-048 (48,000 BTUH)

HWM-48B

-060 (60,000 BTUH)

HWM-60B

-072 (72,000 BTUH)

HWM-72B

A. Inspection

Upon receipt of the equipment, carefully check the shipment against the bill of lading.
Reference EarthLinked
sure all units have been received and model numbers are the same as those ordered.

COMPRESSOR UNIT

MODEL/CAPACITY

Inspect the carton or crating of each unit, and inspect each unit for damage. Assure the
carrier makes proper notation of any shortages or damage on all copies of the freight bill
and he completes a common carrier inspection report. Concealed damage not discovered
during unloading must be reported to the carrier within 15 days of receipt of shipment. If not

filed within 15 days, the freight company can deny the claim without recourse. Note: it
is the responsibility of the purchaser to file all necessary claims with the carrier.

®

matching system component model numbers in Figure 1. Make

HYDRONIC WATER

Figure 1. Matching Component Model Numbers

HWM-407CH-IOM (09/13) Page 5

Equipment should be stored in its packaging in a clean, dry area. Store equipment in an
upright position at all times. Equipment is to be stacked in accordance with the notation on
the packaging. DO NOT remove equipment from shipping cartons until equipment is
required for installation.

Cover equipment on the job site with either shipping cartons, vinyl film or an equivalent
protective covering. In areas where painting, plastering and/or spraying has not been
completed, all due precautions must be taken to avoid physical damage to the equipment
and contamination by foreign material. Physical damage and contamination may prevent
proper start-up and may result in costly equipment clean up. Examine all equipment before
installing.

B. Pre-Installation

®

Prior to installing the Hydronic Water Module and other EarthLinked

space heating and
cooling system above-ground components, you will need tools and equipment listed in
Section 8 to properly install the system.

Installation of the Hydronic Water Module must be done in accordance with this manual and
the EarthLinked

®

Technical Manual.

Prepare the Hydronic Water Module (HWM) for installation as follows:

1. Compare the data on the unit nameplate or packaging with ordering and shipping
information to verify the correct unit has been shipped (See Figure 1.)

2. Keep the HWM covered with the packaging until installation is begun and all plastering,
painting, etc. is finished.

3. Verify refrigerant tubing is free of kinks or dents.

4. Inspect all electrical connections. Connections must be clean and tight at the terminals.

HWM-407CH-IOM (09/13) Page 6

2. General System Layout

Guidelines for the general layout of the Hydronic Water Module and other EarthLinked®
system components are shown in Figure 2.

HWM-407CH-IOM (09/13) Page 7

Figure 2. General System Layout

3. Applications

A typical application of the Hydronic Water Module to a chilled water cooling and radiant
panel hydronic heating system is illustrated in Figures 3.

Figure 3. Typical Chilled Water Cooling and Radiant Panel Hydronic Heating System

HWM-407CH-IOM (09/13) Page 8

A typical application of the Hydronic Water Module to a chilled water cooling system is
illustrated in Figures 4.

Figure 4. Typical Chilled Water Cooling System

HWM-407CH-IOM (09/13) Page 9

4. The Primary Circuit

A. Plumbing

The primary circuit in a typical HWM installation is shown in Figure 5.

Figure 5. Primary Circuit for EarthLinked® System with HWM

The Hydronic Water Module primary circuit water solution plumbing must be installed
consistent with local codes and industry practice. At a minimum, the HWM should have the
fittings as shown in Figure 6. The minimal fittings shown in Figure 6 will facilitat e maintaining
and servicing the Hydronic Water Module. Additional fittings may be required to satisfy local
codes and other hydronic system requirements.

HWM-407CH-IOM (09/13) Page 10

Figure 6. Typical HWM Primary Circuit Plumbing

B. Antifreeze Protection

When the HWM hydronic water module is applied to radiant panel hydronic heating and
chilled water cooling systems, the water circulating system must be protected from potential
damage due to freeze-up by utilizing an adequate antifreeze solution. The antifreeze
protection is provided by the installer prior to the EarthLinked

HWM-407CH-IOM (09/13) Page 11

®

system start-up.

Propylene-glycol antifreeze solution with an inhibitor is the type of antifreeze solution

WATER SOLUTION

MULTIPLIER FACTOR (WSMF)

18

20

x 1.03

8

30

x 1.07

-7

40

x 1.11

-29

50

x 1.16

required for Earthlinked

®

products utilized in radiant panel hydronic heating and/or chilled
water cooling systems. These systems shall be freeze protected consistent with the
application-specific minimum temperature as shown in the table below. Propylene-glycol
antifreeze solutions should always be in the range of 20% to 50% by volume, as indicated in
the Figure 7.

TEMPERATURE, °F PROPYLENE GLYCOL, %

Figure 7. Propylene Glycol Freeze Protection Table

Propylene-glycol can be purchased in the straight form and mixed with an inhibitor prior to
filling the system, or it can be purchased as inhibited propylene-glycol. The following are
examples of manufacturers for the above:

Straight propylene-glycol: Chemical Specialties, Inc. (www.chemicalspec.com/spg.html)
Inhibitor: Nu-Calgon Products, Ty-lon B20 (www.nucalgon.com/products)
Inhibited propylene-glycol: Houghton Chemical Corp., SAFE-T-THERM®,
www.houghton.com/fluids/safe-t-therm/index.html

General guidelines for introducing propylene glycol into the water circulating system follow.
The manufacturer’s specific instructions and industry standards always take precedence
when introducing propylene-glycol to the system.

• Calculate the quantity of inhibited propylene-glycol (fluid) required to achieve the

desired results.

• Introduce a sufficient quantity of water to the system and pressure check to

ensure a sealed system.

HWM-407CH-IOM (09/13) Page 12

)

• Drain some water from the system to provide enough volume for the calculated

amount of fluid.

• Add the correct amount of fluid and any water needed to completely refill the

system, allowing for liquid expansion due to operating temperature.

• Circulate the inhibited propylene-glycol antifreeze solution for at least 24 hours to

ensure complete mixing. Check the liquid concentration to assure that the correct
mixture is obtained.

C. Water Quality

Water quality in hydronic systems is important to the life and efficiency of the system.
Water of poor quality can cause a decrease in heat transfer ability and cause leaks.

Ensuring proper quality water is a key step in the installation of the hydronic water module
(HWM) and circulating water system.

Water quality parameters and the recommended ranges are listed in Figure 8a. The
antifreeze manufacturer’s water quality requirements take precedence over the ranges
listed in Figure 8a.

Parameter Optimal Conditions Comments

Glycol Freeze Protection 20% to 50%

Corrosion inhibitor

Molybdate inhibitor

or

Nitrite inhibitor

pH 9-10.5 pH units

Conductivity 700-3200µS/cm

Hardness 100-300ppm

Bacteria/Mold

100-150ppm

800-1200ppm

No Bacteria or

Mold

Figure 8a. Hydronic System Water Quality Parameters

Below 20% can promote the growth of bacteria. Concentrations
higher than 50% will dramatically reduce the heat transfer
ability. Glycol seepage can occur at o-rings and seals .

Without the addition of Nitrite or Molybdate inhibitors, corrosion
of the metallic components will begin and eventually lead to
leaks.

A pH below 9.0 will allow the corrosion of steel and above 10.5
will allow the corrosion of brass and copper.

Conductivity above 3500µS/cm will cause the water to becom e
physically abrasive and damage the o-rings. Addition of
chemicals to the water will raise the conductivity.

Artificially soft water can be aggressive to the system. The use
of unsoftened water is recommended. Do not use distilled or
purified water.

The growth of bacteria will cause erosion of seals and the
deposit of a bacterial slime will clog the system. Bacteria can
attack the o-rings and cause premature failure. Glycol above
20% will kill any bacteria.

HWM-407CH-IOM (09/13) Page 13

D. Storage Water Heater Sizing and Connections

®

Storage water heaters are necessary with EarthLinked

radiant panel hydronic heating and

chilled water cooling systems, as illustrated in Figures 3, 5 and 6.

ETI Models 60, 80 or 119 GSTE storage water heaters are configured specifically for
hydronic heating and chilled water cooling and meet all requirements for these applications.

Recommended water storage heater capacities are shown in Figure 8b, based on the
nominal tonnage of the compressor unit specified. Typical water heater plumbing
connections are illustrated in Figure 8c.

Compressor Unit

Model/Capacity, BTUH

-018/18,000 -18B 60* 4.5 3/4

-024/24,000 -24B 60* 4.5 3/4

-030/30,000 -30B 60* 4.5 1

-036/36,000 -36B 60* 4.5 1

-042/42,000 -42B 80 4.5 1-1/2

-048/48,000 -48B 80 4.5 1-1/2

-060/60,000 -60B 80 4.5 1-1/2

-072/72,000 -72B 80 4.5 1-1/2

HWM Model

ETI Storage

Water Heater Size,

US Gallons

ETI Storage

Water Heater

Element Rating, kW

Minimum Nominal

Type L Hard Copper

Pipe & Fittings, inches

* NOTE: These sizes are valid only for hydronic heating. If chilled water cooling is to
be provided, 80 gallon ETI Model 80 GST storage water tank is required.

Figure 8b. Storage Tank Capacities and Pipe Sizes

HWM-407CH-IOM (09/13) Page 14

Figure 8c. Typical HWM Piping Illustration

E. Circulating Pump, Piping, Strainer and Flowmeter

The HWM system primary circuit piping arrangements for chilled water (to air) cooling and
radiant panel hydronic heating are illustrated in Figures 3 and 4.

HWM-407CH-IOM (09/13) Page 15

The Hydronic Water Module physical dimensions as well as water solution piping
connections are illustrated in Figure 9.

Figure 9. Hydronic Water Module (HWM)

HWM-407CH-IOM (09/13) Page 16

Figure 10a lists the minimum nominal Type L hard copper pipe and fitting sizes, and the
strainer required for the primary circuit between the hot water module (HWM) and the
storage water heater.

Compressor Unit Size

& Capacity, BTUH

HWM Models

Minimum Nominal Type L

Hard Copper Pipe and

Fittings, Inches

ETI Strainer

Model, Size

-018 (18,000) -18B 3/4

-024 (24,000) -24B 3/4

-030 (30,000) -30B 1

ST-1836

1in FPT

-036 (36,000) -36B 1

-042 (42,000) -42B 1-1/2

-048 (48,000) -48B 1-1/2

-060 (60,000) -60B 1-1/2

ST-4272

1-1/2in FPT

-072 (72,000) -72B 1-1/2

Figure 10a. Minimum Water Pipe, Fitting and Strainer Sizes to Storage Water Heater

The flow meter illustrated in Figure 5 is an important component of the system to (1)
commission the performance of the system at startup and (2) determine when maintenance
to the system strainer and/or HWM heat exchanger is required. (See Maintenance in
Section 7.)
ETI part number ETI-A1-116000-1 flowmeter kit has a range of 5-50 GPM and can be field
calibrated for the appropriate antifreeze mixture for the specific application. The kit includes
the flowmeter and the 5 gallon calibration container.
The flow meter kit (see Figure 10b) may be purchased at

http://www.buygpi.com/eti-a1-

116000-1.aspx.

F. Refrigerant Piping

Refrigerant piping connections and line set sizes are listed in Figure 9.

HWM-407CH-IOM (09/13) Page 17

Figure 10b. Flowmeter Kit

5. Controls and Electrical

A. Hydronic Heating and Chilled Water Cooling

Figures 3 and 5 illustrate a typical hydronic heating and chilled water cooling primary circuit
configurations. The use of a three-way valve is shown in these illustrations. For heating,
the valve is normally open with the flow from the HWM directed DOWNWARD providing
heated water to the s torage water heater. When cooling is called for, the valve is energized
and directs chilled water UPWARD to the hydronic circulating pump.

The electrical field wiring for the HHK-1872 hydronic hot water temperature controller and
the electric heating element/thermostat; and the CWK-1872 chilled water temperature
controller is illustrated in Figure 10c (Part 1 of 2) and 10c (Part 2 of 2).

Figure 10c. (Part 1 of 2) Electrical Field Wiring

– Hydronic Heating and Chilled Water Cooling (HWM)

HWM-407CH-IOM (09/13) Page 18

Figure 10c. (Part 2 of 2) Electrical Field Wiring

– Hydronic Heating and Chilled Water Cooling (HWM)

B. Chilled Water Cooling

The electrical field wiring for the CWK-1872 chilled water temperature controller is
illustrated in Figure 10d (Part 1 of 2) and 10d (Part 2 of 2).

HWM-407CH-IOM (09/13) Page 19

Figure 10d. (Part 1 of 2) Electrical Field Wiring

– Chilled Water Cooling (HWM)

Figure 10d. (Part 2 of 2) Electrical Field Wiring – Chilled Water Cooling (HWM)

HWM-407CH-IOM (09/13) Page 20

C. HWM Freeze Protection Thermostat

1. The freeze protection thermostat is factory installed. The thermostat wiring must be
connected when the HWM is installed. Run the wire through the electrical port in the top
panel of the Hydronic Water Module cabinet. After attaching the wire to the switch terminals,
run it into the Compressor Unit (using a control wiring port), in accordance with applicable
electrical codes.

2. Once the freeze protection switch wire leads are inside the Compressor Unit, locate the
lock-in relay in the Compressor Unit electric box.

3. Proceed to make the electrical connections as shown in the three steps illustrated in Figure
10e. Check all electrical connections to ensure a tight fit and good contact.

Figure 10e. Three-Step Electrical Installation for Freeze Protection Thermostat

4. Replace the cabinet cover to the HWM Hydronic Water Module.

5. If the water solution temperature drops to 38°F, the pre-set switch will trigger and cause the
lock-in relay to terminate power to the compressor. The system requires a manual restart.

6. Follow the Start-Up Procedure in Section 6.

HWM-407CH-IOM (09/13) Page 21

6. Start-Up

The following conditions must be met before starting the HWM:

• The toggle switch on the HWM cabinet must be “OFF”.

• The system has been charged according to instructions.

• Heating elements in the hot water storage tank are “OFF”.

• Temperature of water in hot water storage tank is less than 100°F.

• HWM pump is primed and tank water pressure is normal.

• Gage manifold set is connected to high and low pressure connections on the

compressor unit.

• The storage water heater temperature controller is adj usted to the highest desired
water temperature setting (110°F maximum).

• An accurate temperature sensor is connected to the “Water Out” tube of the HWM
and insulated from ambient air temperature

The HWM start-up steps are as follows:

1. Turn the HWM toggle switch to “ON”.

2. Start system running and monitor compressor discharge pressure and HWM “Water Out”
temperature as water temperature rises.

3. If compressor discharge pressure reaches 350 psig before desired hot water temperature
is achieved, adjust the storage tank temperature controller setting to turn the compressor
off, or (next):

4. When “Water Out” temperature is achieved (pressure < 350 psig), adjust water storage
tank temperature controller to turn compressor unit “OFF”. Reference Figure 11.

.

5. The water storage tank temperature controller setting should be verified by draining some
hot water from the tank and cycling the system again.

HWM-407CH-IOM (09/13) Page 22

Figure 11. Maximum Operating Conditions (R-407C)

6. As appropriate, adjust chilled water controller to a temperature cut out point which is
approximately 5°F above the desired chilled water leaving temperature

.

HWM-407CH-IOM (09/13) Page 23

7. Heat Exchanger Maintenance

MIN. WATER

-042 (42,000)

-42B

7.0

-048 (48,000)

-48B

8.0

A compact brazed heat exchanger is utilized in the Hydronic Water Module.
The water flow rate designed into each of these heat exchangers is 2 or more gallons per

minute per ton of nominal system capacity.

The acceptable water flow rate range for each system is shown in Figure 12. While it is
important for the proper performance of the heat exchanger to maintain water flow rate
between the minimum and maximum shown, it is CRITICAL that the flow rate not drop

below the minimum.

COMPRESSOR UNIT SIZE

& CAPACITY, BTUH

-018 (18,000) -18B 3.0

-024 (24,000) -24B 4.0

-030 (30,000) -30B 5.0

-036 (36,000) -36B 6.0

-060 (60,000) -60B 10.0

-072 (72,000) -72B 12.0

Figure 12. Minimum Heat Exchanger Water Flow Rates

Figure 13 shows minimum antifreeze solution flow rates for various mixtures of propylene
glycol and water

.

HWM

MODELS

FLOW RATE,

GPM

HWM-407CH-IOM (09/13) Page 24

Compressor Unit

-048 (48,000)

-48B

8.2

8.6

8.9

9.3

-060 (60,000)

-60B

10.3

10.7

11.1

11.6

Size/Capacity

(BTUH)

HWM

Model

Minimum Propylene Glycol/Water Solution Flow

Rates, GPM

20% PG 30% PG 40% PG 50% PG

-018 (18,000) -18B 3.1 3.2 3.3 3.5

-024 (24,000) -24B 4.1 4.3 4.4 4.6

-030 (30,000) -30B 5.2 5.4 5.6 5.8

-036 (36,000) -36B 6.2 6.4 6.7 7.0

-042 (42,000) -42B 7.2 7.5 7.8 8.1

-072 (72,000) -72B 12.4 12.8 13.3 13.9

Figure 13. Minimum Heat Exchanger Propylene Glycol/Water Solution F low Rates

To test the solution flow through the hydronic water module, average three solution flow rate
readings when the HWM is in continuous operation as shown in Figure 6.

Check the flow rate against the appropriate rates in Figures 12 or 13.
If flow rate is less than the appropriate minimum shown in Figures 12 or 13, and the

strainer mesh is clean, the heat exchanger is to be cleaned by setting the system up as
noted in Figure 14.

HWM-407CH-IOM (09/13) Page 25

Figure 14. HWM Heat Exchanger Cleaning Set-up

Disconnect power from HWM and be sure pump is off.

Mix heat exchanger cleaning solution in a 55 gallon drum can be sealed and disposed of in
accordance with local and federal chemical waste regulations, when the cleaning process is
completed.

The concentrated cleaning solution for the heat exchanger cleaning process is liquid ice
machine cleaner which is available at any distributor who handles ice machine supplies
(Johnstone Supply, W.W. Grainger, etc).

Two gallons of concentrated liquid ice machine cleaner are recommended for each heat
exchanger cleaning. Recommended brands and manufacturer order numbers are:
Virginia KMP (1 Gallon), Mfr. H419
Nu-Calgon (1 Gallon), Mfr. 4207-48

HWM-407CH-IOM (09/13) Page 26

Mix 1 gallon of concentrated liquid ice machine cleaner per 15 gallons of water in a 55 gallon
drum as shown in Figure 14.

Connect the 3/4” ID x 15’ heavy duty hose to the hose bibb on gate valve (3) and return to the
container holding the cleaning solution. Connect the 3/4” ID x 10’ heavy duty hose to the hose
bibb on gate valve (4) and run near to the bottom of the container holding cleaning solution. See
Figure 14.

Start the closed circuit cleaning by ensuring that gate valves (5) and (6) are tightly shut and then
energize the HWM water circulating pump.

Circulate the cleaning solution through the HWM closed circuit for approximately an hour or until
there is no further change in the color of the cleaning solution.

When cleaning process is completed, turn off the water circulating pump and close gate valve
(4). Disconnect hose from hose bibb on gate valve (4) and drain cleaning solution into drum.
Safely dispose of hose.

Slowly open gate valve (6) to flush the heat exchanger water system clear of cleaning solution.
The flushed mixture is routed into the 55 gallon drum. Approximately 20 gallons of water flushed
through the system will ensure cleaning solution has been thoroughly flushed out of the system
and into the drum.

Close gate valve (3) and remove the hose from the hose bibb on gate valve (3), draining
residual water into the drum.

Safely dispose of hose. Close and seal drum and safely dispose of drum containing used
cleaning solution.

Re-open gate valve (5) as appropriate.
Reconnect power to the HWM in the normal operational mode.
Establish a schedule for regular maintenance of the HWM heat exchanger, based on the results

of the first heat exchanger cleaning.

HWM-407CH-IOM (09/13) Page 27

8. Tools and Equipment

The purpose of the following list is to highlight key pieces of equipment, tools and materials
necessary for the installation, maintenance and servicing of EarthLinked® Heating and
Cooling System HVAC (above ground) equipment.
The professional HVAC technician is expected to have a compliment of standard tools for the
general servicing of refrigeration equipment.

Equipment, Tools and Materials
ITEM DESCRIPTION

1. Vacuum Pump (6 CFM minimum capacity)

2. Evacuation Manifold (for vacuum pump)

3. Digital Vacuum (micron) Gauge

4. Charging/Evacuating Manifold for R-407C

5. Charging/Hi-Vacuum Hoses (black, quantity of 6)

6. Digital Refrigerant Scale

7. Digital Thermometer

8. Digital Sling Psychr ome ter

9. Air Flow Meter (for air handlers)

10. Nitrogen Tank with 0 – 600 psig Regulator and Handtruck

11. Oxy-acetylene Welding Torch Set

12. 15% Silver Brazing Alloy

13. Refrigerant Recovery Unit (1/2 #/minute minimum vapor capacity)

14. Recovery Cylinder (50# capacity)

15. Halogen Leak Detector

16. Digital VOM

17. Digital Clamp-on Ammeter

18. Digital Water Flowmeter (3 to 30 gpm)

19. Tubing Cutters

20. Tubing Benders

21. Nut Driver

22. Cordless Drill (3/8”)

23. Swaging Kit

24. Deburring Tool

25. Drill Bit Set

26. Inspection Mirror

HWM-407CH-IOM (09/13) Page 28

Index

Circulating ...........................................................................................................................15, 18, 27

Compressor ............................................................................................................ 14, 17, 22, 24, 25

Connection .................................................................................................................................... 14

Connections .............................................................................................................. 6, 14, 16, 17, 22

Controls ......................................................................................................................................... 18

Flow Meter ............................................................................................................................... 17, 28

Flow Rate ................................................................................................................................ 24, 25

Manifold ................................................................................................................................... 22, 28

Model ........................................................................................................................ 5, 14, 17, 24, 25

Piping .................................................................................................................................15, 16, 17

Pump ................................................................................................................ 15, 18, 22, 26, 27, 28

Refrigerant ........................................................................................................................... 6, 17, 28

Sizing ............................................................................................................................................. 14

Storage Tank ................................................................................................................ 14, 17, 18, 22

System .................................................................. 5, 6, 7, 8, 9, 10, 13, 14, 15, 17, 22, 24, 25, 27, 28

Temperature .......................................................................................................................12, 22, 23

Water ................................................. 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 22, 23, 24, 25, 27, 28

HWM-407CH-IOM (09/13) Page 29