5
Installation
SNA-Series Tankless Heater
Keltech •
215-1815 Rev. B; ECN 130011
10/17/2014
Plumbing Installation
2
CAUTION! To avoid water damage, install a drain
pipe from the pressure relief valve to
an unrestricted drain.
B
Install one union on the water inlet side of the
heater and another union upstream of the 100
Mesh (150 micron) y-strainer .
Install one union on the water outlet side of the
heater and another after the P & T Relief Valve .
Install one union on the TepidGuard
™
discharge outlet .
Install the pressure relief valve (150 psi) and outlet
plumbing of heater per code requirements and
route relief valve discharge to drain . Make sure no
shutoff valve is between the relief valve discharge
and the drain .
C
Use 1-1/4" hard copper tubing or pipe as needed .
A
Install shutoff valve above (upstream of) the heater .
Failure to install proper filtration may result
in a flow sensor malfunction.
See Figure 2 for reference and suggested
installation configuration.
If end use fixture is not at the highest point in
the plumbing loop, then an automatic air vent
valve must be added at the highest point in the
system or at any drop to eliminate trapped air.
Components Needed:
• (5) Union 1-1/4"
• Shutoff Valve
• Pressure and Temperature Relief Valve (150 psi)
• Y-Strainer (100 mesh) or Inline Filter (150 microns)
• (2) Gate or Ball Type Valves
• Drain pipe
• Elbows, nipples and fittings as needed
Dim. "A"
Dim. "B"
Dim. "C"
36kW
60"(1524)
48"(1219)
36"(914)
54kW
60"(1524)
48"(1219)
36"(914)
63kW
72"(1829)
60"(1524)
48"(1219)
72kW
60"(1524)
48"(1219)
36"(914)
108kW
60"(1524)
48"(1219)
36"(914)
126kW
72"(1829)
60"(1524)
48"(1219)
144kW
72"(1829)
60"(1524)
48"(1219)
FIGURE 2
Dimensions,
Plumbing
and Electrical
Configurations
B
C
A
31-1/2"
(800mm)
23-1/2" (597mm)
5-1/2" (140mm)
15-1/4"
(387mm)
3-3/4"
(95mm)
6" (152mm)
6" (152mm)
Access Panel
30"
(762mm)
29"
(737mm)
12"
(305mm)
1-1/4" Female NPT
Outlet
1-1/4" NPT
Female
Inlet
Suggested Location For
Power Entrance . Holes
Provided By Installer .
Relief
Valve
Outlet
Inlet
"Y" Strainer
To Drain
Threaded
Union
Optional
Fused
Disconnect
Optional
Fused
Disconnect
1-1/4" NPT
Female
"TepidGuard
™
"
Discharge
(Drain)
"TepidGuard
™
"
Discharge
(Drain)
Maintain area
above Access
Panel for height
"C" to be clear of
obstructions
Rotate outlet 90˚
during installation
for adequate
clearance
Suggested Installation Configuration
Components provided by installer unless otherwise specified .
Reference the product options sections or contact your local Bradley
Representative for product options .
