9
Installation
HL-Series Tankless Heater
Keltech •
215-1823 Rev. A; ECN 150023
11/24/2015
Start Up
5
A
Slowly turn on water supply to the unit
with the enclosure cover open and the
breaker in the off position .
C
Turn off the connected process and
check the entire system to verify leak-free
installation .
D
Secure the enclosure cover (standard
NEMA 1) or door (NEMA 4/4X) .
F
Energize the electrical service to the unit
by switching on the two or three pole
switch or circuit breaker . Unit is now in
the ready state .
B
Slowly turn on the water outlet valve,
activate the connected process requiring
heated water (faucet, shower, etc .), then
flush the system for 5 minutes to ensure all
air is purged from the system .
NOTICE! Failure to bleed air properly
will damage elements and
cause heater malfunction.
Be sure that plumbing and electrical are complete per Start Up Check List.
WARNING Make sure the breaker for the heater is OFF.
H
When startup is complete, leave the two
or three pole switch or circuit breaker
in the ON position . The digital display
should read ambient temperature and
OFF .
G
Turn on the connected process; observe
output temperature rise to setpoint .
On NEMA 1 controller, set point and
output temperatures are located side
by side. On the NEMA 4/4X controller,
the top portion of temperature controller
displays output temperature, bottom
displays setpoint temperature.
E
If your heater has the N4-EXP2 or N4X-
EXP2 option and is located in a Class
I Division 2 area, please review Special
Instructions & Operation Instructions
section for all proper electrical
connections and sealing to ensure
the installation will provide the proper
protection.
Proceed to Step F once you
have completed the steps in the Special
Instructions & Operation Instructions or if you
do not have this option .
