11
Installation
CLE Series Tankless Heater
Keltech •
215-1822 Rev. A; ECN 140011
10/2/2015
Output heating capacity is reduced if these heaters are installed on 415V, 400V or 380V 3-ph .
Contact the factory to supply this information .
Satisfactory performance of the heater is dependent upon a specific flow rate vs temperature rise capability . If the
desired temperature is not achieved, please verify the following:
1 . Circuit breaker is on and rated for the maximum power draw .
2 . Heater is drawing the proper current for the supply voltage on all 3 phases .
3 . All 3 phase indicator lights are lit (not flashing) indicating maximum power draw and maximum
amperage is being drawn .
4 . Flow rate and temperature rise in the water heating process are compatible with the heater specifications .
5 . Verify there is no additional supply of cold water entering the line downstream of the heater .
Product Options
AL3 & AL3-SL Alarms:
The AL3 option provides dry contacts that open to signal flow >1 .5 gpm has activated the
heater . The AL3-SL option provides these dry contacts and additionally activates a local audible and visual alarm on
the heater .
GF (Ground Fault):
Detects electrical leakage from external sources to protect equipment, electronics, and the heat
exchanger from being damaged in the event of a power fault . After turning on water, then power, test ground fault:
1 . Press GF Test button .
2 . Watch for ground fault light to illuminate and Bank Ready light(s) to shut off . The Ground Fault system is active
and in working order .
3 . Press the GF Reset button, hold for 2 seconds and release to reset ground fault .
NOTE: If a trip occurs under normal operation DO NOT RESET Ground Fault without evaluation and service.
NOTE: Normal state is Ground Fault light OFF, Bank Ready lights ON.
ENHT Freeze Protection (ENHT)
: ENHT offers protection to -20°F (-28°C) . This level of protection utilizes the normal
heater supply voltage . No additional dedicated circuit to the unit is required during field installation . Freeze protection
(ENHT option) includes an internally insulated NEMA 4/4X enclosure and thermostatically controlled forced air heater to
maintain internal temperatures above freezing . The ENHT option also includes a connection point for DCS monitoring .
In the event of a power interruption or ENHT system failure when internal enclosure temperatures reach 40°F (4 .4°C)
or lower, the unit will notify a facilities control/monitoring system that the unit is unable to maintain freeze protection .
Regardless of state of power to the unit, this warning notifies maintenance personnel and provides an opportunity to
correct the condition before any damage occurs to the unit .
NOTICE! With this option, three phase power must be continuously applied to the heater for the internal
freeze protection heater to operate properly and provide protection. If three phase power cannot
be continuously applied, the heat exchanger must be completely drained of water and electrically
locked out or damage from freezing may occur. Use Start Up procedure to restart this equipment.
This option does not require a separate electrical circuit.
NOTICE! Failure to install these options properly, to maintain power at all times or to connect the contacts
provided on ENHT heaters correctly to the BMS may result in damage to the heater and void
the warranty. Please utilize the temperature sensor contacts (N.O.) that can provide a signal to
a remote device when temperature inside the cabinet drops below 40°F (4°C) and be aware of
freezing conditions in your area (Reference Schematic). The contacts will open and notify you that
the operations of the system should be verified.
EXP2 (Explosion Proof Purge System):
Keltech's EXP2 option makes heaters compliant for classified areas;
Class I Division 2, Groups A, B, C, D, Temp Code: T5 . The Purge System requires a supply of clean instrument air or
inert gas (provided by installer) . This supply maintains a positive internal pressure and prevents the enclosure from
filling with flammable gases, dusts or vapors from the ambient environment . The externally mounted purge system is
rated to -4°F (-20°C) . Complete installation provided in this manual .
FDS Fused Disconnect:
Internal fused disconnect interlocks with enclosure door when energized, prohibiting access
to a live cabinet . Select the FDS option for an additional level of safety and convenience at the heater location .
N4X (NEMA 4X Enclosure):
Corrosion resistant enclosure made of stainless steel and idea for harsh environments .
ENHT is rated to -20° (-28°C) and EXP2 is rated to -4°F (-20°C). When both ENHT and EXP2 are selected,
the unit is rated to -4°F (-20°C).
