EarthLinked DSH-1872 User manual

DSH KIT (04/13) Copyright 2013 Earthlinked Technologies, Inc.
EarthLinked®
Model DSH-1872 Desuperheater Kit
for
SC and CC Compressor Units
CONTENTS
PAGE
Desuperheater Kit Information 3
Desuperheater Mechanical Installation 9
Desuperheater Electrical Installation 17
System Start-Up 20

DSH KIT (04/13) Page 2
Disclaimer
Proper installation and servicing of this EarthLinked®Kit is essential to the Heating and Cooling
Systems reliable performance. All EarthLinked®systems and kits 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.Failure to provide installation and service by an authorized, trained installer in a
manner consistent with this manual 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 the field specified components.
Earthlinked Technologies, Inc.
4151 South Pipkin Road
Lakeland, Florida 33811
tel. [phone] ● fax [phone]
[e-mail] ● www.earthlinked.com
CSI # 23 80 00

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Desuperheater Kit Information
For SC Compressor Units:
The field installed ETI Desuperheater Kit Model DSH-1872 equips the SC Series
Compressor Unit with supplemental water heating capability during (1) heating and
cooling mode operation or (2) cooling mode operation for the ETI Heating and
Cooling System.
Use of the desuperheater to heat water during the heating season will increase the heating
load on the space heating equipment by 2,000 BTUH for each adult and teenager
occupant.
For CC Compressor Units:
The field installed ETI Desuperheater Kit Model DSH-1872 equips the CC Series
Compressor Unit with supplemental water heating capability during cooling mode
operation.
For SC and CC Compressor Units:
Typical water piping installed with an existing or new standard storage water heater is
illustrated in Figure 1.
Water piping for the desuperheater installed with an ETI Model GSTE Storage Water
Heater is illustrated in Figure 2. The GSTE Series Storage Water Heater is available in 60,
80 and 119 gallon capacities with water piping connections built into the top of the storage
water heater specifically for use with the desuperheater. All GSTE Series models are
equipped with a 4.5 kW electric heater and provide the following hot water recovery rates in
gallons per hour, for a range of water temperature increases, in degrees Fahrenheit.
ΔT 30 40 50 60 70 80 90
GPH 62 46 37 31 26 23 21
*ΔT in ºF; GPH in U.S. Gallons per hour.

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Field wiring for the DSH-1872 Kit applied to the SC Compressor Unit is illustrated in
Figure 3a for water heating during (1) heating and cooling system operation and (2) cooling
system operation only.
Field wiring DSH-1872 Kit applied to the CC Compressor Unit is illustrated in Figure 3b
for water heating during cooling system operation.
Figure 1. Desuperheater Installed with Existing or New Standard Storage Water Heater

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Figure 2. Desuperheater installed with GSTE Storage Water Heater.

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Figure 3a. SC Field Wiring for Desuperheater Kit

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Figure 3b. CC Compressor Unit Field Wiring

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Mounting/Location
The Desuperheater is mounted vertically on a solid surface indoors in a space with ambient
temperatures of 40°F or above. The Desuperheater is to be located within 10 feet of the
compressor unit and as close as possible to the storage water heater (not to exceed 25 feet),
with interconnecting water lines insulated.
Controls
As illustrated in Figures 3a and 3b, the Desuperheater contains a water high limit control. It is
factory set to 140°F. It also contains a refrigerant gas low limit, which is factory set to 125°F.
The freeze protection control is designed to operate the circulating pump when water
temperatures of 40°F or less are detected, in order to provide water circulation independent of
compressor operation.
Heat Exchanger
The Model DSH-1872 Desuperheater contains a corrosion resistant all-copper double wall heat
exchanger of counterflow twin tube design. The heat exchanger is continuously vented along its
entire length and meets IAPMO safety requirements and exceeds applicable UL requirements.
Circulator Pump
The Desuperheater contains a Taco 006 series low wattage wet rotor in-line single stage
circulator. The water cooled pump is rated at 60 watts, 230 volts and 0.40 amperes. It is
designed for 125 psig working pressure and up to 220°F fluid temperature. The pump housing is
bronze and the bearings are ceramic.

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Desuperheater Mechanical Installation
Before initiating mechanical or electrical installation of the Desuperheater, read, understand and
execute the following:
When brazing copper tubing, always utilize the nitrogen brazing process as described here:

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Two refrigerant lines must be run from inside the compressor unit cabinet to the Desuperheater.
The available holes (marked “plugged”) in the cabinet for the SC compressor units are shown in
Figure 4.
For the CC compressor unit, shown in Figure 5, two additional holes of at least 1” diameter are to
be field drilled in the plumbed panel of the cabinet to accommodate the interconnecting refrigerant
tubing.
See Kit Contents in Desuperheater Electrical Installation section.
Desuperheater piping and connections to the compressor units are illustrated as follows:
SC: Figures 6 & 7
CC: Figures 8 & 9
Water piping for all compressor unit sizes is 1/2” OD copper with insulation on both water lines and
the storage water heater located as close as practical to the Desuperheater, within 25 feet
maximum.
Figures 1 and 2 illustrate typical water piping, fittings and connections for the Desuperheater and
storage water heater.

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Figure 4. SC Cabinet Dimensions and Connections

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Figure 5. CC Cabinet Dimensions and Connections

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Figure 6. SC Internal Flow Schematic with Desuperheater

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Figure 7. SC Piping with Desuperheater

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Figure 8. CC Internal Flow Schematic with Desuperheater

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Figure 9. CC Piping with Desuperheater

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DESUPERHEATER ELECTRICAL INSTALLATION
Kit Contents
In addition to 4 Ft. of 1/2” Type ACR soft copper tubing and two 1/2” 90o copper ells, the DSH-1872
kit contains the following items for electrical installation. Figure 10 lists the kit items and which are
utilized in the installation on SC and CC compressor units.
Kit Components Used with
SC
Compressor CC Compressor
Fuse Holder (2) Yes Yes
Fuses (2) Yes Yes
Screws (8) Yes- 8 Yes- 5
2 Block Term. Strip Yes Yes
Pink Wire
Yes
Yes
Gray Wire
Yes
Yes
3 Block Term. Strip Yes No
DPDT Relay Yes No
Red Wire Yes No
Black Wire Yes No
Blue Wire Yes No
Yellow/Green Wire
Yes
No
Yellow/Blue Wire Yes No
Red/White Wire Yes No
Figure 10. DSH-1872 Kit Electrical Components

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SC Compressor Unit
Figure 11. SC Compressor Unit Field Wiring
1. Turn “OFF” all electrical power to the EarthLinked®system.
2. Install fuse holders, fuses, three pole terminal strip, two pole terminal strip and water.
heater relay in electrical box with fasteners, as shown in Figure 11.
3. Connect wires as shown in Figure 11.
4. Install fuses.
5. Check all wiring for proper routing and ensure good connections at all terminals.

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CC Compressor Unit
Figure 12. CC Compressor Unit Field Wiring
1. Turn “OFF” all electrical power to the EarthLinked®system.
2. Drill holes in electrical box as necessary to install fuse holders and terminal strips as
shown in Figure 12.
3. Connect wires as shown in Figure 12.
4. Field wire DSH to terminal strips.
5. Install fuses.
6. Check all wiring for proper routing and ensure good connections at all terminals, prior to
restoring electric power to the system components.
7. Test system for functionality.

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SYSTEM START-UP
1. Braze and check all field-made refrigerant joints for leaks and repair as necessary. See
the EarthLinked® Heating and Cooling System Installation, Operation and
Maintenance Manual,or the appropriate SC Quik-Start Manual or CC Quik-Start
Manual for the proper procedure.
2. Evacuate and charge the refrigerant system in accordance with the appropriate
EarthLinked® Heating and Cooling System Installation, Operation and Maintenance
Manual,or the appropriate SC Quik-Start Manual or CC Quik-Start Manual.
3. Fill the water system and ensure that all air has been eliminated from the desuperheater,
to prevent pump cavitation and bearing damage.
4. Check and repair all field-made water system joints to ensure there are no leaks.
5. Start system and check for functionality.