EarthLinked®
STORAGE WATER HEATER
MODELS GSTE-60, GSTE-80 & GSTE-119
Installation, Operation & Maintenance Manual
Disclaimer
The EarthLinked® Storage Water Heater is sold as a component part of an EarthLinked®
Space Heating and Cooling System or an EarthLinked® Commercial Water Heating System. It
must be properly sized, matched and installed with other system components to provide the
intended performance and safe operation of the system. This component must be installed by
an authorized, trained technician who has successfully completed the ETI training class and
passed the final examination.
Installation must be made in accordance with this manual and the installation manual for the
appropriate system noted above. Failure to provide installation by an authorized, trained
installer in a manner consistent with the appropriate manuals will nullify the limited warranty
coverage for the system.
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 field specified com ponents.
Earthlinked Technologies, Inc.
4151 South Pipkin Road
Lakeland, Florida 33811
tel. 863-701-0096 • fax 863-701-7796
info@earhlinked.com • www.earthlinked.com
SWH-IOM (08/10) Copyright 2010 Earthlinked Technologies, Inc.
Table of Conten ts
1. General Description of Applications ....................................................................................... 4
2. EarthLinked® Commercial Water Heating Applications ........................................................... 6
3. EarthLinked® Domestic Water Heating (DWM) Applications .................................................. 9
4. EarthLinked® Desuperheater Water Heating Applications .................................................... 12
5. EarthLinked® Hydronic Heating and Chilled Water Cooling (HWM) Applications ................. 15
Hydronic Heating Only: ........................................................................................................ 15
Hydronic Heating and Chilled Water Cooling: ...................................................................... 17
6. Operation .............................................................................................................................. 21
7. Maintenance ......................................................................................................................... 22
8. Manufacturer’s Instructions ................................................................................................... 24
Page 2
List of Figures
Figure 1. GSTE Storage Water Heater Description .................................................................. 5
Figure 2a. Commercial Water Heating Application ................................................................... 6
Figure 2b. Top of Tank Connections – CWH ............................................................................ 7
Figure 2c. Electrical Field Wiring – CWH .................................................................................. 8
Figure 3a. Domestic (DWM) Water Heating Application .......................................................... 9
Figure 3b. Top of Tank Connections – DWM .......................................................................... 10
Figure 3c. Electrical Field Wiring – DWM ............................................................................... 11
Figure 4a. Desuperheater Water Heating Application ............................................................ 12
Figure 4b. Top of Tank Connections – Desuperheater ........................................................... 13
Figure 4c. Electrical Field Wiring – Desuperheater ................................................................. 14
Figure 5a. Hydronic Heating (HWM) Application .................................................................... 15
Figure 5b. Top of Tank – Hydronic Heating (HWM) ................................................................ 16
Figure 5c. Electrical Field Wiring – Hydronic Heating (HWM) ................................................. 17
Figure 5d. Hydronic Heating and Chilled Water Cooling (HWM) Application .......................... 18
Figure 5e. Top of Tank Connections – Hydronic Heating and Chilled Water Cooling (HWM) 19
Figure 5f. Electrical Field Wiring – Hydronic Heating and Chilled Water Cooling (HWM) ....... 20
Page 3
1. General Description of Applications
The GSTE-60, GSTE-80 and GSTE-119 Storage Water Heaters are applied to the following
EarthLinked® systems. Installation instructions for each of these applications follow.
• Earthlinked® Commercial Wat er Heati ng A pp licat i on s providing heated potable
water from the compressor unit and delivered to a storage water heater, where reserve
electric heating is required if the compressor unit is out of service. The electric heat
would be activated manually at the breaker if the compressor unit is taken off line. This
application is detailed in Section 2.
• EarthLinked® Domestic Water Heating Applications utilizing the Domestic Water
Module (DWM) providing heated potable wat er from the DWM and deliver ed to a
storage water heater, where reserve electric heating element is required if the
compressor unit is out of service. The electric heat would be activated manually at the
breaker if the com pressor unit is taken off line. This application is detailed in Section 3.
• EarthLinked® Desuperheater Water Heating Applications utilizing the SD
Compressor Unit (equipped with a desuperheater) or the Model DSH-1872
Desuperheater Kit applied to an SC or SW compressor unit providing heated
potable water to supplement the standard electric storage water heater. In this
application, the desup er heater operates to heat water when the EarthLinked® Heating
and Cooling System is operating in cooling mode. The desuperheater functions to
supplement, but not replace, the water being heated by the standard storage water
heater. This application is detailed in Section 4.
• EarthLinked® Hydronic Heating and Chilled water Cooling Applications utilizing
the Hydronic Water Module (HWM) providing heated hydronic water solution from
the HWM and delivered to the storage water heater (the primary circuit) where an
electric heating element supplements the heating of the hydronic water solution as a
function of outdoor temperature, controlled by an outdoor thermostat. This application is
detailed in Section 5.
The EarthLinked® Model GSTE Storage Water Heater description appears in Figure 1. In
addition to the storage water heater, temperature control Model HHK-1872 is required for
commercial water heating, domestic water heating and radiant panel hydronic heating
applications; and the temperature control Model CWK-1872 is required for chilled water cooling
applications.
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Figure 1. GSTE Storage Water Heater Description
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2. EarthLinked® Commercial Water Heating Applications
Figure 2a illustrates a typical installation of a GSTE storage water heater with a commercial
water heating compressor unit. Location of th e tank from the compressor unit is to be no more
than 10 ft. apart. Water piping and connections between the compressor unit and tank are all
1-1/2” Type L copper. Hot water supply to the system is out the top of the tank as shown.
Details for the ports and connections on top of the tank are shown in Figure 2b. The electrical
field wiring for the HHK-1872 temperature controller and the storage water heater elec tr i c
element and thermostat are illustrated in Figure 2c.
Figure 2a. Commercial Water Heating Application
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Figure 2b. Top of Tank Connections – CWH
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Figure 2c. Electrical Field Wiring – CWH
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3. EarthLinked® Domestic Water Heating (DWM) Applications
Figure 3a illustrates the installation of GSTE storage water heater with a Domestic Water
Module for a residential heating application. Location of the GSTE storage water heater from
the DWM is to be no more than 10 ft. apart. Water piping and connections between the
compressor unit and tank are all 1-1/2” Type L copper for the models DWM-4248 and DWM-
6072. Piping and connec ti ons ar e 1” Ty pe L c opp er for model DWM-1836. Detail for the por ts
and connections on top of the storag e w ater heater are shown in Figure 3b. The elec tr i cal field
wiring for the elec tr ic h eater element and thermostat are illustrated in Figure 3c.
Figure 3a. Domestic (DWM) Water Heating Application
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Figure 3b. Top of Tank Connections – DWM
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Figure 3c. Electrical Field Wiring – DWM
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4. EarthLinked® Desuperheater Water Heating Applications
Figure 4a illustrates the installation of a GSTE storage water heater with a Desuperheater
supplementing the hot water heating function. Although the desuperheater in Figure 4a is
shown as a separate unit, (as Desuperheater Kit Model DSH-1872 applied to SC and SW
compressor units) the installation instructions apply to the SD compressor unit also.(The SD
incorporates the desuperheater within the compressor unit cabinet). Location of the water
heater from the Desuperheater (or the SD compressor unit) is to be no more than 10 ft. apart.
Water piping connections between the Desuperheater (or SD compressor unit) and the water
heater are ½” Type L copper. Details for the ports and connections on top of the water heater
are shown in Figure 4b. The electrical field wiring for the electric heating element and
thermostat are illustrated in Figure 4c.
Figure 4a. Desuperheater Water Heating Application
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Figure 4b. Top of Tank Connections – Desuperheater
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Figure 4c. Electrical Field Wiring – Desuperheater
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5. EarthLinked® Hydronic Heating and Chille d Water Cooli ng ( HWM)
Applications
Hydronic Heating Only:
Figure 5a illustrates the installation of a GSTE storage water heater with the Hydronic Water
Module (HWM) providing heated water (only) to a hydronic system. Location of the storage
water heater from the HWM is to be no more than 10 ft. apart. Water piping and fittings
between the HWM and the storage water heater are to be 1” Type L copper for model HWM1836, and 1-1/2” Type L copper for models HWM-4248 and HWM-6072. Detail for the ports
and connections on top of the tank are illustrated in Figure 5b. The electrical field wiring for the
HHK-1872 temperature controller and the electric heater element and thermostat are illustrated
in Figure 5c.
Figure 5a. Hydronic Heating (HWM) Application
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Figure 5b. Top of Tank – Hydronic Heating (HWM)
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Figure 5c. Electrical Field Wiring – Hydronic Heating (HWM)
Hydronic Heating and Chilled Water Cooling:
Figure 5d illustrates the installation of a GSTE storage water heater with the Hydronic Water
Module (HWM) to provide hydronic heating and chilled water cooling. Location of the storage
water heater from the HWM is to be no more than 10 Ft apart. Water piping and fittings
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between the HWM and the storage water heater are to be 1” Type L copper for model HWM1836, and 1-1/2” Type L copper for model s H WM-4248 and HWM-6072.
Detail for the ports and connections on top of the tank are illustrated in Figure 5e.
The electrical field wiring for the HHK-1872 temperature contr oll er , the electric heating element
and thermostat, and the CWK-1872 temperature controller is illustrated in Figure 5f.
Figure 5d. Hydronic Heating and Chilled Water Cooling (HWM) Application
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Figure 5e. Top of Tank Connections – Hydronic Heating and
Chilled Water Cooling (HWM)
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Figure 5f. Electrical Field Wiring – Hydronic Heating and
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Chilled Water Cooling (HWM)
6. Operation
Cold Water Supply Temperature, °F
Max. Temperature Control Set Point, °F
55 and above
110
45
105
40
100
Thermostat Marking
Temperature, °F
Minimum
110
HOT
120
A
130
B
140
C
150
VERY HOT
160
The GSTE storage water heater operates in conjunction with the other components of the
EarthLinked
®
system. Entire system op er ati o nal func ti ons are detailed in EarthLinked
®
system
manuals. The following operational functions pertain only to the storage water heater.
HHK-1872 Temperature Control Setting
The temperature control setting on the storage water tank/heater, ETI Model HHK-1872, is set
at the time of start-up. For opti mu m Commercial Water Heating (CWH) system performance,
the temperature control setting should be limited to a maximum water temperature rise
through the compressor unit of 60F. The following lists the maximum temperature control
set points, based on the cold water supply temperature:
Freeze Protection
In the event that the compressor unit and GSTE storage water heater system is to be shut
down for extended periods of time with surrounding air temperature below 32°F, the system is
to be drained of water, to prevent freezing damage to the compressor unit, storage water
heater and other interconnected piping components.
Hydronic Heating and Chilled Water Cooling Systems
When the GSTE storage water heater is applied to hydronic systems and anti-freeze solution
is utilized, ETI recommends the preferred use of propylene glycol (non-toxic) in the appropriate
mixture percentage with water. Ethylene glycol solution is also an acceptable anti-freeze.
GSTE as Booster Heater
When the GSTE storage water heater is applied as a booster heater in tandem with a storage
water tank (which stores water at 110F maximum) for the purpose of raising the water
temperature, the thermostat controlling the electric heating element can be adjusted to the
appropriate water temperature utilizing the following thermostat m arkings:
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7. Maintenance
The following schedule covers the items that require regular checking and maintenance on the
GSTE storage water heater. The details for each it e m fol low the maintenance schedul e .
Maintenance Schedul e
Every 6 Months (First Year Only)
Check Anode Rod(s)
Every 12 Months
Check Anode Rod(s)
Flush Tank
T&P Valve
Check Anode Rod(s) – First Year
The anode rods should be inspected twice the first year. The first time check the anode rods is
six months after the heater is installed.
The anode rod is a 3/4” diameter magnesium rod that “sacrifices itself ” to control corrosion. If
an anode rod has reduced in size to 1/4” diameter or shows signs of pitting it is time for
replacement. To check the anode rod, follow these steps:
• Turn OFF the electric power.
• Shut OFF the water supply by means of the main cold water supply isolation valve.
• Open a drain valve in the piping illustration long enough to relieve the tank pressure and
drain water, as appropriate, to lower water level below top of tank.
• Remove caps on top of the storage tank.
• Use a 1-1/16” six-sided socket wrench and breaker bar. Snap hard to break the anode
rod seal.
• Remove rod(s), inspect and replace with new rod(s) as necessary. (An anti-sieze pipe
sealant is recommended, teflon tape is acceptable). Replacement anode rods are
specified in the storage water tank and storage water heater literature that came with
the tank or heater. The anode rods can be ordered through the local Bock dealer listed
at www.bockwaterheaters.com
• Tighten the anode rod nut(s) and snap the caps into place.
• Be sure all drain valves are closed, turn on the main cold water supply isolation valve
and purge the air from the tank and associated piping, as appropriate.
• Turn ON the electric power and initiate normal unit operation.
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Check Anode Rod(s) – After First Year
• Repeat the inspection and maintenance as required on a once-a-year basis after the
first year, unless necessary to inspect more often.
Flush Tank
• Turn OFF electric power.
• Close the isolation valves between the GSTE storage water heater and other
EarthLinked® system components.
• Close the main cold water supply isolation valve to the storage water tank/heater.
• Open a faucet downstream of the hot water outlet on the storage water heater.
• After connecting the storage water heater drain valve to a drain hose, open the drain
valve and drain the entire tank of water to an open drain.
• Close tank drain valve.
• Open the main cold water inlet valve and fill the storage water heater with clean water
until it is approximately 25% full.
• Turn off the main cold water supply isolation valve, open storage water heater drain
valve, and observe the water coming out the drain valve going into the drain.
• Continue to flush the tank as noted above until the water coming out the drain valve is
clear and free of sediment.
• Close the drain valve and the faucet.
• Open the main cold water supply valve and fill the storage water heater and piping
system with water.
• Open the isolation valves between EarthLinked® system components and the storage
water heater and purge air from system.
• Turn ON electric power and initiate normal system operation.
T&P Valve
Check the GSTE T&P Valve for proper operation by doing the following:
• Turn OFF electric power.
• Attach a drain hose to the valve, with water discharge directed to an open drain.
• Lift the lever at the end of the valve several times.
• The valve should operate freely and return to its original position properly.
• If water does not flow out of valve, close main cold water supply isolation valve to the
system, and close isolation valves between EarthLinked® system components and the
storage water heater, and lower the water level to below the T&P valve.
• Remove valve and inspect for corrosion or obstructions.
• Replace with new valve if necessary. DO NOT REPAIR AND INSTALL THE FAULTY
VALVE.
• Open the isolation valves between the EarthLinked® system components and the
storage water heater. Open the main cold water supply to fill the system. Purge air from
system.
• Turn ON electric power and initiate normal system operation.
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8. Manufacturer’s Instructions
The storage water heater Models 60 GSTE, 80 GSTE and 119 GSTE are m anufactured and
warranted by Bock Water Heaters, Inc. of Madison, Wisconsin.
Prior to installing this storage water heater, read and follow the installation instructions
attached to the storage water heater tank.
For recognition purposes, the first page of the Bock Installation Instructions for the “Geo-Stor™
Geothermal Storage Tank with Electric Backup” is on the following page.
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