HWM-H-IOM (10/14)
Page 14
D. Storage Water Heater Sizing and Connections
Storage water heaters are necessary with EarthLinked
®
radiant panel hydronic heating systems,
as typically illustrated in Figures 3 and 4.
ETI Models 60, 80 or 119 GSTE storage water heaters are configured specifically for hydronic
heating and meet all requirements for these applications.
Recommended water storage tank capacities are shown in Figure 6, based on the nominal
tonnage of the compressor
unit specified.
Compressor
Unit
Model/Capacity,
BTUH
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
-018/18,000
-1836
60
4.5
3/4
-024/24,000
-1836
60
4.5
3/4
-030/30,000
-1836
60
4.5
1
-036/36,000
-1836
60
4.5
1
-042/42,000
-4248
80
4.5
1-1/2
-048/48,000
-4248
80
4.5
1-1/2
-054/54,000
-5472
80
4.5
1-1/2
-060/60,000
-5472
80
4.5
1-1/2
-072/72,000
-5472
80
4.5
1-1/2
Figure 6. Storage Tank Capacities and Pipe Sizes
E. HWM Dimensions and Component Information
The Hydronic Water Module physical dimensions as well as water solution piping connections
are illustrated in Figure 7.
IMPORTANT
A STORAGE WATER HEATER USED FOR HYDRONIC HEATING MUST
BE EQUIPPED WITH SUPPLEMENTAL ELECTRIC HEATING WITH A
RATING OF AT LEAST 20% OF THE DESIGN HEATING LOAD. FAILURE
TO DO SO WILL VOID THE EARTHLINKED
®
HEATING AND COOLING
SYSTEM LIMITED WARRANTY.
