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C1N Series Tankless Heater
2
Plumbing Installation
Components Needed:
• (2) Union 3/4"
• Shutoff Valve
• Pressure and Temperature Relief Valve (150 psi/10
bar)
• Y-Strainer (100 mesh) or Inline Filter (150 microns)
• (2) Gate or Ball Type Valves
• Drain pipe
• Water hammer arrestor (recommended)
• Elbows, nipples and fittings as needed
CAUTION To avoid damage to the electronics
or internal wiring, do not perform any
brazing or sweat soldering inside the
enclosure.
NOTICE! Failure to install proper filtration may
result in a flow switch malfunction.
NOTICE! To avoid water damage, install a drain
pipe from the pressure relief valve to an
unrestricted drain.
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.
Dimensions, Plumbing and
Electrical Configurations
¾" Female
NPT Outlet
2"
6"
(51)
(152)
A
B
18½" (470)
20" (508)
Suggested Location For Power Entrance .
6
¾" Female
NPT Inlet
Optional
Fused
Disconnect
10 .95"
(278)
Entrance Holes To Be Provided By
Installer .
1/10/2022
A
Install shutoff valve above (upstream of) the
heater inlet .
Install one union on the water inlet side of
the heater . Install one 100 Mesh (150 micron)
Y-strainer above (upstream of) union .
Install one union on the water outlet side of
the heater . Install one P & T Relief Valve above
(downstream of) union .
B
Install the pressure relief valve (150 psi/10 bar) and
outlet plumbing of heater per code requirements
and route relief valve discharge to drain . Make
sure no shutoff valve is between the water heater
outlet and the relief valve, as well as no shutoff
valve between the relief valve discharge and drain .
Install hammer arrestor . Ensure plumbing is secure
and not subject to vibrations .
C
Use 3/4" hard copper tubing or pipe as needed .
Outlet
P&T Relief
Valve
3⁷⁄₁₆"
(87)
To
Drain
8"
(203)
Suggested Installation Configuration
Components provided by installer unless
otherwise specified . Reference the product
options sections or contact your local Bradley
Representative for product options .
Inlet
Dim. "A"
18 kW
31-1/2" (800)
25 kW
37-1/2" (953)
Ball or Gate
Shutoff Valves
Y-Strainer with
100 Mesh Screen
Recommended
Threaded
Unions
Bradley • 215-1820 Rev. D
Installation
(mm)
Dim. "B"
30" (762)
36" (914)
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