Plumbing Installation - Keltech CNA-36 Installation Manual

CNA-Series Tankless Heater
2

Plumbing Installation

Components Needed:
• (4) 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
• 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 sensor 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
12"
(305mm)
Access Panel
B
A
Suggested Location For
Power Entrance . Holes
Provided By Installer .
6
23-1/2" (597mm)
15-1/4"
6" (152mm)
(387mm)
3-3/4"
(95mm)
5-1/2" (140mm)
1-1/4" Female NPT
Outlet
31-1/2"
(800mm)
Optional
Fused
Disconnect
30"
(762mm)
7/13/2015
A
Install shutoff valve above (upstream of)
the heater inlet .
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 .
B
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 . Install hammer arrestor . Ensure
plumbing is secure and not subject to vibrations .
C
Use 1-1/4" hard copper tubing or pipe as needed .
Dim. "A"
36kW
60"(1524)
54kW
60"(1524)
63kW
72"(1829)
72kW
60"(1524)
108kW
60"(1524)
126kW
72"(1829)
144kW
72"(1829)
Relief
Valve
1-1/4" NPT
Female
Inlet
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 .
Dim. "B"
48"(1219)
48"(1219)
60"(1524)
48"(1219)
48"(1219)
60"(1524)
60"(1524)
Panel for height
Outlet "C" to be clear of
C
Rotate outlet 90˚
during installation
for adequate
Inlet
Optional
Fused
Disconnect
Keltech • 215-1814 Rev. C; ECN 150010
Installation
Dim. "C"
36"(914)
36"(914)
48"(1219)
36"(914)
36"(914)
48"(1219)
48"(1219)
Maintain area
above Access
obstructions
clearance
"Y" Strainer