Heating and Cooling System

EarthLinked®
Domestic Water Module
Installation, Operation & Maintenance Manual
DWM-H-IOM (10/13)
Copyright 2013 Earthlinked Technologies, Inc
Disclaimer
This manual contains instructions for the EarthLinked® Domestic Water Module which is
combined with other EarthLinked® system components, field specified water heaters,
water storage tanks and associated fittings, controls and piping.
Proper installation and servicing of the EarthLinked® Domestic Water Module is essential
to its reliable performance. All EarthLinked® systems and components must be installed
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 EarthLinked® Technical
Manual. Failure to provide installation and service by an authorized, trained installer in a
manner consistent with the subject manuals will nullify the limited warranty coverage for
the system.
EarthLinked® Technologies manufactures and sells only the EarthLinked® system
components and the performance information contained herein is based on performance
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.
Earthlinked Technologies, Inc.
4151 South Pipkin Road
Lakeland, Florida 33811
tel. 863-701-0096 ● fax 863-701-7796
info@earthlinked.com ● www.earthlinked.com
CSI # 23 80 00
DWM-H-IOM (10/13)
Page 2
Table of Contents
1. Inspection/Pre-Installation ............................................................................................................ 5
A. Inspection............................................................................................................................... 5
B. Pre-Installation ....................................................................................................................... 6
2. General System Layout................................................................................................................ 7
3. Application ................................................................................................................................... 7
A. General .................................................................................................................................. 7
B. Freeze Protection ................................................................................................................. 10
C. Water Pipe Plumbing and Fittings ........................................................................................ 10
D. Storage Water Heater and Tank ........................................................................................... 11
E. Filtration and Water Quality .................................................................................................. 14
F. Refrigerant Piping ................................................................................................................ 16
4. Field Wiring ................................................................................................................................ 16
5. Start-Up ..................................................................................................................................... 17
6. Heat Exchanger Maintenance Procedure ................................................................................... 19
7. Water Filtration System and Strainer Maintenance Procedure ................................................... 23
8. Tools and Equipment ................................................................................................................. 25
9. Domestic Storage Water Heater and Storage Water Tank Sizing .............................................. 26
DWM-H-IOM (10/13)
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List of Figures
Figure 1. Matching Component Model Numbers.............................................................................. 5
Figure 2. General System Layout .................................................................................................... 7
Figure 3. Typical DWM Application: Water Filtration System, Strainer
and Water Piping Details .................................................................................................. 8
Figure 4. Domestic Water Module (DWM) ....................................................................................... 9
Figure 5. DWM Minimum Water Pipe, Fitting and Strainer Sizes to Water Tank ............................ 10
Figure 6. Minimum DWM Water Flow Rates .................................................................................. 11
Figure 7a. ETI Series GST Storage Water Tanks ............................................................................ 12
Figure 7b. ETI Series GSTE Storage Water Heaters ....................................................................... 13
Figure 8. Recommended Water Filtration Systems........................................................................ 14
Figure 9. Hardness of Ground Water – Contiguous USA ............................................................... 14
Figure10. Water Quality Parameters for Domestic (Potable) Water Heating ................................... 15
Figure 11. Field Wiring for SC Compressor Unit with DWM ............................................................. 16
Figure 12. Maximum Operating Conditions (R-410A) ...................................................................... 18
Figure 13. Maximum Operating Conditions (R-407C) ...................................................................... 18
Figure 14. Minimum DWM Water Flow Rates .................................................................................. 19
Figure 15. Water Flow Test Set-up .................................................................................................. 20
Figure 16. DWM Heat Exchanger Cleaning Set-up.......................................................................... 21
DWM-H-IOM (10/13)
Page 4
1. Inspection/Pre-Installation
A. Inspection
Upon receipt of the equipment, carefully check the shipment against the bill of lading. Reference
EarthLinked® matching system component model numbers in Figure 1. Make sure all units have
been received and model numbers are the same as those ordered.
Compressor Unit
Domestic Water Module
-018, -024, -030, -036
DWM-1836
-042, -048
DWM-4248
-060, -068, -072
DWM-6072
Figure 1. Matching Component Model Numbers
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.
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.
DWM-H-IOM (10/13)
Page 5
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 Domestic 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 Domestic Water Module must be done in accordance with this manual and the
EarthLinked® Heating and Cooling Installation, Operation and Maintenance Manual.
Prepare the Domestic Water Module (DWM) for installation as follows:
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.)
Keep the DWM covered with the packaging until installation is begun and all plastering, painting,
etc. is finished.
Verify refrigerant tubing is free of kinks or dents.
Inspect all electrical connections. Connections must be clean and tight at the terminals.
DWM-H-IOM (10/13)
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2. General System Layout
Guidelines for the general layout of the Domestic Water Module and other EarthLinked® system
components are shown in Figure 2.
Figure 2. General System Layout
3. Application
A. General
A typical Domestic Water Module application is shown in Figure 3.
DWM-H-IOM (10/13)
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Figure 3. Typical DWM Application: Water Filtration System, Strainer
and Water Piping Details
Essential water fittings are shown in Figure 3. However, all installations must be consistent with
applicable codes.
The following guidelines apply to DWMs applied in any system.
DWM-H-IOM (10/13)
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The dimensions, port locations and connections and performance of the DWM are illustrated in
Figure 4.
DWM Recovery Rate
60°F Temperature Rise*
Recovery Rate, US Gal/Hr
Compressor
DWM
Model
Model
R-410A
-024
-1836
50
-036
-1836
74
-048
-4248
101
-060
-6072
117
-068
-6072
127
*60°F Earth Temperature, H-5 Earth Loop, 40°F Entering Water
Temp, 100°F Leaving Water Temp.
DWM
MODEL
DWM-1836
DWM-4248
DWM-6072
TUBING CONNECTION SIZES
(INCHES O.D.)
WATER
WATER
REFR.
REFR.
IN
OUT
VAPOR LIQUID
7/8
7/8
7/8
1/2
1-1/8
1-1/8
7/8
1/2
1-1/8
1-1/8
7/8
1/2
LINE SET SIZES
(INCHES O.D.)
REFR.
REFR.
VAPOR
LIQUID
1/2
3/8
5/8
1/2
3/4
1/2
Figure 4. Domestic Water Module (DWM)
DWM-H-IOM (10/13)
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B. Freeze Protection
C. Water Pipe Plumbing and Fittings
Figure 5 lists the minimum nominal Type L hard copper pipe fitting and strainer sizes for the
interconnecting piping between the domestic water module (DWM) and the water storage tank
shown in Figure 3.
Compressor Unit Size
& Capacity,
BTUH
DWM
Model
-018 (18,000)
-024 (24,000)
-030 (30,000)
Minimum Nominal Type L
Hard Copper Pipe and
Fittings, Inches
-1836
3/4
ST-1836
1
1 in. FPT
1
-042 (42,000)
1-1/2
-4248
-060 (60,000)
-068 (68,000)
-072 (72,000)
Flowmeter
Model , Size
3/4
-036 (36,000)
-048 (48,000)
ETI
Strainer
Model, Size
1-1/2
1-1/2
-6072
FM-1872
1in. FPT
ST-4272
1-1/2 in. FPT
1-1/2
1-1/2
Figure 5. DWM Minimum Water Pipe, Fitting and Strainer Sizes to Water Tank
The 20 mesh inline strainers are to be installed immediately upstream of the water inlet to the
DWM as shown in Figure 3, to prevent particulate matter from restricting water flow through the
brazed plate heat exchanger.
The flowmeter in Figures 3 and 5 is necessary to measure water flow rate when the DWM is
operating. This is important to determine when maintenance to the system is to be performed.
Minimum water flow rates through the DWM heat exchanger, when operating normally are
shown in Figure 6.
DWM-H-IOM (10/13)
Page 10
Compressor Unit
Model/Size
DWM
Model
-018
Minimum
Flow, GPM
3.0
-024
4.0
-1836
-030
5.0
-036
6.0
-042
7.0
-4248
-048
8.0
-060
10.0
-068
-072
-6072
12.0
12.0
Figure 6. Minimum DWM Water Flow Rates
The ETI flowmeter kit model FMK-1872 (or equivalent) is recommended for field installation with
the DWM to (1) determine proper flow rate for optimum performance and (2) provide data to
indicate when maintenance to the strainer or DWM heat exchanger is required.
D. Storage Water Heater and Tank
The Domestic Water Module provides hot water at 110ºF (maximum) for storage in a properly
sized, insulated storage water tank as shown in Figure 3. If a higher water temperature is
required, a storage water heater shown in Figure 3 can be installed to heat the 110ºF water
coming out of the storage water tank to the desired temperature.
See the Section 9 Storage Water Heater and Storage Water Tank Sizing Guide to properly size
these components for the residential or small commercial application.
ETI provides a full line of insulated water storage tanks in 30, 50, 80 and 119 US Gallon
capacities. ETI Water Storage Tanks are illustrated in Figure 7a. See the price pages for the
GST Series Storage Water Tanks.
ETI also provides a full line of storage water heaters in 60, 80 and 119 US Gallon capacities.
These water heaters are designed to match the EarthLinked® Domestic Water Module Heating
System and provide 4.5 kW of water heating booster power to bring the 110ºF heated water up
to the desired temperature. ETI Water Storage Heaters are illustrated in Figure 7b. See the
price pages for the GSTE Series Storage Water Heaters.
DWM-H-IOM (10/13)
Page 11
®
EarthLinked 30, 50, 80 and 119 gallon storage water tanks are designed for commercial and
®
residential applications where water storage is required. These are approved for use with EarthLinked
systems to store heated potable water.
The insulated, glass-lined tanks have large 2" NPT geoexchange connections to provide maximum heat
exchange efficiency.
DIMENSIONS, INCHES
MODEL
STORAGE,
US GAL.
GEO
CONN., NPT
HOT
CONN., NPT
RELIEF VALVE
CONN., NPT
A
B
C
D
SHIPPING
WT.,
LBS
30GST
30
2”
2”
3/4”
39-1/2
20
11-1/4
4-3/8
145
50GST
50
2”
2”
3/4”
48-1/2
22
11
4-1/4
195
80GST
80
2”
2”
3/4”
60-1/2
24
22
7
240
119GST
119
2”
2”
1”
65-1/2
28
22
7
350
When the GST Series Water Storage Tank is used with the Domestic Water Module Water Heating
System, the hot water output from the Domestic Water Module is connected to the “From
Geoexchange” port on the water tank. The input to the Domestic Water Module is connected to the
“To Geoexchange” port on the water tank. The cold water supply is teed into this connecting line. The
leaving hot water connection is on the top of the storage tank.
The HHK-1872 Temperature control is field wired to the compressor unit and set at the desired hot
water temperature, up to a maximum of 110ºF.
Figure 7a. ETI Series GST Storage Water Tanks
DWM-H-IOM (10/13)
Page 12
®
EarthLinked 60, 80 and 119 gallon storage water heaters are designed for applications where water
storage plus supplementary electric heat are required. These are approved for potable water.
The insulated, glass-lined tank contains a 4500 watt element to provide electric heat backup in
domestic water heating (DWM) systems, or operate as the storage water heater in systems containing
®
an EarthLinked desuperheater.
When the GSTE Series Water Storage Heater is used in series with the GST Series Water Storage Tank,
as illustrated in Figure 3, all of the ports on the side and top of the water heater are plugged except the
“Cold In” which is connected to the hot water output from the storage tank; and the “Hot Out”, which is the
leaving hot water supply. The thermostat behind the “Electrical Heating Assembly” panel is employed to
set the hot water temperature.
If the GSTE Storage Water Heater is used as a Storage Water Tank (with an inactive electric heating
emergency backup), the hot water outlet from the Domestic Water Module is connected to the “From
Geoexchange” port and the inlet to the Domestic Water Module is connected to the “To Geoexchange” port.
The cold water supply enters the top of the water heater at “Cold In”. The leaving hot water connection is
“Hot Out”. The two desuperheater ports on top of the tank and the “CWK-1872” port on the side of the tank
are plugged.
The HHK-1872 control is set for the hot water temperature, the maximum being 100ºF.
Figure 7b. ETI Series GSTE Storage Water Heaters
DWM-H-IOM (10/13)
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E. Filtration and Water Quality
The inclusion of a water filtration system in all applications of the DWM is necessary. The water
filtration system reduces the potential for silt, dirt, rust and other particulate matter from entering
the heated water system. The water filtration system is illustrated in Figure 3 with additional
necessary fittings for the DWM installation.
Recommended water filtration systems are listed and illustrated in Figure 8.
FILTRATION
SYSTEM MODEL
Whirlpool
WHCF-DWHBB
General Electric
GNWH35F
REPLACEMENT
CARTRIDGE MODEL
WHCF-GD25BB
(25 micron)
FXHSC
(30 micron)
DIMENSIONS &
CONNECTIONS
13-1/4 x 7-1/2 x 7-1/2”
1” FPT
14 x 8 x 8”
1” FPT
RETAIL
SOURCE
Lowes
Home
Depot
Figure 8. Recommended Water Filtration Systems
When specifying a Domestic Water Module to provide heated potable water, it is important to
ensure that the water is not hard, and to have the water analyzed and treated as appropriate for
several factors that affect the quality of potable water.
Figure 9 illustrates the relative hardness of ground water in the contiguous USA.
Figure 9. Hardness of Ground Water – Contiguous USA
DWM-H-IOM (10/13)
Page 14
Figure 10 provides additional information concerning the factors that affect the quality of
potable water, including water hardness.
Water Quality
Parameter
Corrosion pH
Scaling: Hardness,
Calcium and Magnesium
Carbonate
Acceptable Range
9 – 10.5
Total Hardness: 20 –
80 ppm*
Ryznar Stability
Index: 6.0 to 7.5
Langelier Saturation
Index:
-0.5 to +0.5
Comments
Acidity/Alkalinity: Below 9.0, steel will
corrode. Above 10.5, brass and copper will
corrode.
Scaling Potential: Should check the Ryznar
Stability Index and Langelier Saturation Index
at the domestic water module leaving water
temperature. See DWM System
Maintenance, Section 6.
Corrosion:
Hydrogen Sulfide
<0.5 ppm
Sulfates
<125 ppm
Chlorine
<0.5 ppm
Chlorides
<2.0 ppm
Carbon Dioxide
<75 ppm
Ammonia
<0.5 ppm
Ammonia
Chloride/Nitrate/
Hydroxide/Sulfate
Total Dissolved Solids
(TDS)
Iron Fouling:
<0.5 ppm
2+
Iron Fe (Ferrous)
Iron Fouling
Erosion & Clogging
Rotten egg smell appears at 0.5 ppm
For cupronickel
For copper at 10°C
<1000 ppm
If Fe2 > 0.2 ppm, with pH 6 to 8, 02 < 5 ppm,
check for Iron Bacteria
Above this level deposition occurs
Install ETI - supplied 20 mesh inline strainer.
Size in accordance with Figure 6 in this
manual.
*Water Hardness (as calcium)
• Soft: 0 – 20 ppm
• Moderately Soft: 20 – 40 ppm
• Slightly Hard: 40 – 60 ppm
• Moderately Hard: 60 – 80 ppm
• Hard: 80 – 120 ppm
• Very Hard: >120 ppm
Figure10. Water Quality Parameters for Domestic (Potable) Water Heating
DWM-H-IOM (10/13)
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F. Refrigerant Piping
Refrigerant piping connections and line set sizes are listed in Figure 4.
4. Field Wiring
Field wiring for the Domestic Water Module to the SC compressor unit with a booster storage
water heater, as shown in Figure 3, is illustrated in Figure 11. The heat sense bulb is Figure 11
is HHK-1872 Temperature Controller.
Figure 11. Field Wiring for SC Compressor Unit with DWM
DWM-H-IOM (10/13)
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5. Start-Up
The following conditions must be met before starting the DWM:
•
•
•
•
•
•
•
•
The toggle switch on the DWM 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.
DWM pump is primed and tank water pressure is normal.
Gauge manifold is connected to high pressure connection on the compressor unit.
The water storage tank temperature controller is adjusted to the highest desired water
temperature setting (110°F maximum).
An accurate temperature sensor is connected at the “Water Out” connection of the DWM
and insulated from ambient air temperature.
The DWM start-up steps are as follows:
1. Turn the DWM toggle switch to “ON”.
2. Start system running and monitor compressor discharge pressure and DWM “Water Out”
temperature as water temperature rises.
3. If compressor discharge pressure reaches 475 psig (R-410A) or 350 psig (R-407C) before
desired hot water temperature is achieved, adjust the storage water tank temperature
controller setting to turn the compressor off, or (next):
4. When “Water Out” temperature, is achieved (pressure < 475 psig for R-410A or < 350 psig
for R-407C), adjust storage water tank temperature controller to turn compressor unit
“OFF”. Reference Figures 12 and 13.
5. The storage water tank temperature controller setting should be verified by draining some
hot water from the tank and cycling the system again.
DWM-H-IOM (10/13)
Page 17
Figure 12. Maximum Operating Conditions (R-410A)
Figure 13. Maximum Operating Conditions (R-407C)
DWM-H-IOM (10/13)
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6. Heat Exchanger Maintenance Procedure
A compact brazed heat exchanger is utilized in the Domestic Water Module (DWM).
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 11. 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)
-024 (24,000)
-030 (30,000)
-036 (36,000)
-042 (42,000)
-048 (48,000)
-060 (60,000)
-068 (68,000)
-072 (72,000)
HWM
MODELS
MIN. WATER FLOW
RATE, GPM
-1836
-1836
-1836
-1836
-4248
-4248
-6072
-6072
-6072
3.0
4.0
5.0
6.0
7.0
8.0
10.0
12.0
12.0
Figure 14. Minimum DWM Water Flow Rates
If the water hardness test conducted at installation indicates a total hardness greater than 60
ppm, the heat exchanger water flow rate should be checked after the first year of operation to
determine if water flow rate is within the normal operating range.
DWM-H-IOM (10/13)
Page 19
To test the water flow rate of the domestic water module, average three water flow rate readings
when DWM is in continuous operation as shown in Figure 15.
Check water flow rate against the minimum rates shown in Figure 14.
If the water flow rates are less than those listed in Figure 14, above, the heat exchanger is to be
cleaned by setting the system up as noted in Figure 16.
Figure 15. Water Flow Test Set-up
DWM-H-IOM (10/13)
Page 20
Figure 16. DWM Heat Exchanger Cleaning Set-up
Disconnect power from DWM 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.
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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
Mix 1 gallon of concentrated liquid ice machine cleaner per 15 gallons of water in a 55 gallon
drum as shown in Figure 16.
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 16.
Start the closed circuit cleaning by ensuring that gate valves (5) and (6) are tightly shut and then
energize the DWM water circulating pump.
Circulate the cleaning solution through the DWM 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 DWM in the normal operational mode.
Establish a schedule for regular maintenance of the DWM heat exchanger, based on the results
of the first heat exchanger cleaning.
DWM-H-IOM (10/13)
Page 22
7. Water Filtration System and Strainer Maintenance Procedure
For EarthLinked® Heating and Cooling systems that utilize the Domestic Water Module (DWM)
to heat potable water, the filtration system is to be checked at least every 3 months to
determine if the cartridge is to be replaced.
Figure 6 illustrates the recommended filters to be used with the DWM, and includes the
replacement cartridges. Figure 6 is repeated below.
FILTRATION
SYSTEM MODEL
Whirlpool
WHCF-DWHBB
General Electric
GNWH35F
REPLACEMENT
CARTRIDGE MODEL
WHCF-GD25BB
(25 micron)
FXHSC
(30 micron)
DIMENSIONS &
CONNECTIONS
13-1/4 x 7-1/2 x 7-1/2”
1” FPT
14 x 8 x 8”
1” FPT
RETAIL
SOURCE
Lowes
Home
Depot
Recommended Water Filtration Systems
Typical DWM Application showing Water Filtration System, Strainer
and Water Piping Details
DWM-H-IOM (10/13)
Page 23
The strainer (see previous page) should also be checked periodically to determine if it requires
service. The strainer bowl is transparent and easy to see the amount of particulate matter that
has built up on the 20 mesh screen.
As appropriate, clean or replace the 20 mesh screen after relieving the water pressure of the
system.
When the water filtration system is being checked, cleaning sediment from the insulated
storage water tank may be in order.
The tank drain valve is shown on the previous page exits the tank at the lowest point, sharing
the return water line to the DWM.
To drain sediment from the tank, do the following:
1. Turn electrical supply to compressor unit and DWM “OFF”.
2. CLOSE the cold water inlet valve to the storage water tank.
3. OPEN a nearby hot water faucet and leave open while draining the storage water tank.
4. Connect a hose to the drain valve and terminate to an adequate drain.
5. OPEN the storage water tank drain valve to enable tank to drain.
6. After visible sediment has drained, and water is clear, close the drain valve and nearby hot
water faucet.
7. Reopen the cold water supply to the storage water tank.
8. Allow air to exit by opening the nearest hot water faucet. Allow water to run until a constant
flow is obtained.
9. Close hot water faucet and re-energize power to compressor unit and DWM.
DWM-H-IOM (10/13)
Page 24
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.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
Vacuum Pump (6 CFM minimum capacity)
Evacuation Manifold (for vacuum pump)
Digital Vacuum (micron) Gauge
Charging/Evacuating Manifold for R-410A and R-407C (quantity of 2)
Charging/Hi-Vacuum Hoses (black, quantity of 6)
Digital Refrigerant Scale
Digital Thermometer
Digital Sling Psychrometer
Air Flow Meter (for air handlers)
Nitrogen Tank with 0 – 600 psig Regulator and Handtruck
Oxy-acetylene Welding Torch Set
15% Silver Brazing Alloy
Refrigerant Recovery Unit (1/2 #/minute minimum vapor capacity)
Recovery Cylinder (50# capacity)
Halogen Leak Detector
Digital VOM
Digital Clamp-on Ammeter
Digital Water Flowmeter (3 to 30 gpm)
Tubing Cutters
Tubing Benders
Nut Driver
Cordless Drill (3/8”)
Swaging Kit
Deburring Tool
Drill Bit Set
Inspection Mirror
DWM-H-IOM (10/13)
Page 25
9. Domestic Storage Water Heater and Storage Water Tank Sizing
The following procedure as detailed in LIT-153 is for sizing the hot water storage tank used in
conjunction with the EarthLinked® domestic water module (DWM) and compressor unit for
residential application.
The sizing procedure is based on the HUD-FHA Minimum Water Heater Capacities for One and
Two Family Living Units, using electric water heaters. The source is the 2007 ASHRAE HandbookHVAC Applications, Service Water Heating, page 49.13.
Residential storage water heaters and storage water tanks are commercially available in capacities
of 30, 40, 50, 55, 66 and 80 US Gallons. The water heaters utilized as hot water storage tanks are
to be UL listed as a storage water heater.
The water heater is to be of standard height (not low boy, utility, table top or compact
configurations) with at least one electric heating element (upper).
DWM-H-IOM (10/13)
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DWM-H-IOM (10/13)
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DWM-H-IOM (10/13)
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DWM-H-IOM (10/13)
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DWM-H-IOM (10/13)
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DWM-H-IOM (10/13)
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