34000 Autry Street, Livonia, MI 48150 | 800.968.5530 | Fax 734.419.0209 | www.hamiltonengineering.com | LIT91127US REV 5/2018
Page 29
Reference dimensions are ± 10%
All dimensions are ± 1"
MM/DD/YY
MM/DD/YY
1/2"=1'
Custom
Dwg No.
Customer / Job name:
Scale:
Description:
Date:
Drawn/
Revised by:
Checked/
Apv. by:
Revision:
Description:
Date:
Drawn/
Revised by:
Checked/
Apv. by:
Revision:
(1)HWH 399 to 6x36 HSS
AJT
10/11/10
XX
To System
From
System
Basic piping connection steps are listed below. A drawing, specific to your application can be obtained from your dis-
tributor or Hamilton Engineering, Inc., which will guide you through proper installation of the EVO.
1) Pipe properly, in accordance with generally accepted piping principals or Hamilton Engineering
specific documents.
2) Connect system return to the pipe entering the EVO closest to the back.
3) Connect system supply to the pipe leaving the EVO containing the Relief Valve.
4) Install Drain Valve on system supply.
Note: the EVO can not be drained of water without purging the unit with air pressure, 15 PSI minimum.
The system’s air vent must be closed during this process.
(FIGURE 5-1) BOILER PIPING
(TABLE 5-1) BOILER PIPING
Model
Boiler Only
GPM ∆P
Design ∆T
Pump
Supplied
Minimum Manifold Pipe Size
Single Double Triple Quad
HW 79
4.4 @ 7.9'
34.6º F 19.2º C PMP 90302
1"
1"
1"
1.5"
HW 129
4.4 @ 7.9'
58.9º F 32.7º C PMP 90302
1"
1"
1"
1.5"
HW 179
6.6 @ 7.9'
53.7º F 29.8º C PMP 90302
1"
1"
1.5"
1.5"
HW 199.1
6.6 @ 7.9'
57.6º F 32.0º C PMP 90302
1"
1"
1.5"
1.5"
HW 299
11 @ 9.3'
51.8º F 28.8º C PMP 90304
1.5"
1.5"
2"
2"
HW 399
17.6 @ 8.5' 43.2º F 24.0º C PMP 90304
1.5"
2"
2"
2.5"
HW 599
26.4 @ 9.4' 45.3º F 25.2º C PMP 90310
1.5"
2"
2.5"
3"
PIPING
Note: Flow rates shown above are for clean, closed loop systems.
PART 5. PIPING
A. HYDRONIC HEATING BOILER PIPING
The EVO is designed to function in a closed loop (minimum) 12 PSI System. Never let the EVO operate without a
minimum of 10 PSI water pressure, this assures that the EVO heat exchanger can be completely purged of air, failure
to do so could cause damage. It is important to note that the EVO Boiler is flow dependent for proper efficiency and
life expectancy; therefore, primary-secondary piping or use of a low loss header design is always recommended, as
shown in the Figure 5-1 below. Each EVO Heating Boiler System should have an Air Eliminator, in addition to the heat
exchanger mounted air vent, which will remove air from the Hydronic System. Always follow good piping practices. Ob-
serve minimum 1" clearance to combustibles around all uninsulated hot water pipes,
or when openings around pipes
are not protected by non-combustible materials. On an EVO installed above the level of the highest heat transfer
device, some state and local codes require a low water cut off device at the time of installation by the installer. A
water flow switch is provided as standard and will take the place of a low water cut-off. If the EVO supplies hot
water to heating coils in air handler units, flow control valves or other devices must be installed to prevent gravity
circulation of boiler water in the coils during the cooling cycle.
