Evo HW 79 - 34000 Autry Street, Livonia, MI 48150 • 800.968.5530 • Fax 734.419.0209 • Www.hamiltonengineering.com • LIT91127 REV; Water Heating Piping

34000 Autry Street, Livonia, MI 48150 • 800.968.5530 • Fax 734.419.0209 • www.hamiltonengineering.com • LIT91127 REV 3/09
Page 22 of 50
PIPING
D. WATER HEATING PIPING
1) Use only the pipe sizes shown and a pump meeting the listed specications in the following tables:
*Note: Individual Appliance Piping pressure drop used in the tables is based on 20 feet of straight pipe,
6 elbows, 2 tees, 2 full port ball valves and 2 unions.
2) The cold water supply to the water heating system should be connected between the heater outlet
and the storage tank or the storage tank directly. This will help minimize unnecessary short cycling
due to small hot water draws.
3) Isolation valves should be installed on each heater and on the cold and hot water system connections.
Upon completion of piping, ll and properly purge of all air. Open all valves and start circulating pump. Consult
Hamilton Engineering for specic piping diagrams for your application at 800.968.5530.
               

(FIGURE 5-2) HEATER PIPING
Connect
expansion
tank here
Cold Water
Inlet
Relief Valv
e
Location
WATER HEATER
HW 79
HW 129
HW 179
HW199.1
HW299
HW399
HW599
6.6 @ 19.9'
6.6 @ 19.9'
9.9 @ 21.8'
9.9 @ 21.8'
16.5 @ 22.9'
26.4 @ 20.3'
39.6 @ 23.6'
23.5˚F
40.1˚F
36.6˚F
39.2˚F
35.3˚F
29.4˚F
30.9˚F
PMP 30213
PMP 30213
PMP 30213
PMP 30209
PMP 30209
PMP 30209
PMP 30229
13.1˚C
22.2˚C
20.3˚C
21.8˚C
19.6˚C
16.3˚C
17.1˚C
Model *GPM ∆P Design ∆T
*Water heater and piping as described above
Pump
Supplied
Minimum manifold pipe size
Single Double Triple Quad
1"
1"
1"
1"
1.5"
2"
2"
1"
1"
1.5"
1.5"
2"
2"
2.5"
1.5"
1.5"
1.5"
1.5"
2"
2.5"
3"
1.5"
1.5"
2"
2"
2.5"
3"
4"
BOILER
HW 79
HW 129
HW 179
HW199.1
HW299
HW399
HW599
4.4 @ 7.9'
4.4 @ 7.9'
6.6 @ 7.9'
6.6 @ 7.9'
11 @ 9.3'
17.6 @ 8.5'
26.4 @ 9.4'
34.6˚F
58.9˚F
53.7˚F
57.6˚F
51.8˚F
43.2˚F
45.3˚F
PMP 30213
PMP 30213
PMP 30213
PMP 30213
PMP 30209
PMP 30209
PMP 30229
19.2˚C
32.7˚C
29.8˚C
32.0˚C
28.8˚C
24.0˚C
25.2˚C
Model GPM P Design T
Pump
Supplied
Minimum manifold pipe size
Single Double Triple Quad
1"
1"
1"
1"
1.5"
1.5"
1.5"
1"
1"
1"
1"
1.5"
2"
2"
1"
1"
1.5"
1.5"
2"
2"
2.5"
1.5"
1.5"
1.5"
1.5"
2"
2.5"
3"
Boiler Only