Keltech CLE18 Installation Instruction - Plumbing Installation
5
Installation
CLE Series Tankless Heater
Keltech • 215-1822 Rev. A; ECN 140011
10/2/2015
Plumbing Installation
2
B
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
union .
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 water heater
outlet and the relief valve, as well as no shutoff
valve between the relief 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 .
A
Install shutoff valve above (upstream of) the
heater inlet .
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.
Components Needed:
• (2) Union 3/4"
• 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
• Water hammer arrestor (recommended)
• Elbows, nipples and fittings as needed
Dim. "A"
Dim. "B"
18kW
31-1/2" (800)
30" (762)
25kW
37-1/2" (953)
36" (914)
Dimensions, Plumbing and
Electrical Configurations
¾" Female
NPT Outlet
¾" Female
NPT Inlet
2"
(51)
Suggested Location For Power Entrance .
Entrance Holes To Be Provided By Installer .
6"
(152)
A
B
18½" (470)
20" (508)
8"
(203)
3⁷⁄₁₆"
(87)
Outlet Inlet
P&T Relief
Valve
Ball or Gate
Shutoff Valves
Y-Strainer with
100 Mesh Screen
Recommended
Threaded
Unions
To Drain
Suggested Installation Configuration
Components provided by installer unless
otherwise specified . Reference the product
options sections or contact your local Bradley
Representative for product options .
Optional
Fused
Disconnect
10 .95"
(278)
CAUTION! To avoid damage to the electronics
or internal wiring, do not perform any
brazing or sweat soldering inside the
enclosure.