8
HL-Series Tankless Heater
Installation
11/24/2015
Keltech •
215-1823 Rev. A; ECN 150023
Start Up Check List
4
Plumbing
System is set in a vertical, level, and upright position with the outlet located at the top (installing the heater on
its back, for example, will trap air in the heat exchanger) . System is mounted to the wall using the (4) mounting
holes located on the back of the enclosure .
Confirm installation of shutoff valve above (upstream of) the union on the inlet connection . Confirm installation of
a Y-strainer (100 mesh screen) or inline filter (150 micron) between the inlet shutoff valve and the heater .
Pressure and temperature relief valve is installed on tepid water outlet immediately following the union . No valve
or restriction is between the relief valve and the system or the relief valve and drain . Shutoff valve is installed
after pressure and temperature relief valve on outlet if required by local or national plumbing codes .
If the hot water process 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 plumbing loop to eliminate trapped air .
Electrical
Verify supply voltage matches the indicated voltage on the Serial Tag . Serial Tag is located within the heater
enclosure on the upper left corner of the back plate (mounting plate) .
Appropriate conduit is installed properly, secured and sealed to unit enclosure per NEC and hazard
location requirements . If the heater is installed in a classified area, it must be ordered with the correct hazard
location product options (ex . EXP2) .
Appropriate conductors for unit routed through conduit and secured to power block inside the enclosure
(See Electrical Specifications chart) . All electrical is installed in accordance with national and local electrical
codes, including fuse size and rating .
Appropriate earth ground is installed to the lug provided within the enclosure .
