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EKS (NI, NIS, NV, NV PH, NV PTC/PS)
www.salda.lt
EKS duct heaters are designed to heat clean air in ventilation systems and to preheat air handling units.
Corrosion resistant casing
with excellent
thermal reflectivity is made from AluZinc. Duct connection is with rolled rubber seals, duct heater elements are made from stainless steel. To ensure
safety in duct heaters are installed
2 protection thermostats
and screw terminals for easy connection.
To ensure long service time of heaters,
casings are produced from AluZinc
coated steel and heating elements from stainless steel AISI 304. AluZinc
for heaters casing was selected for it’s properties:
• Good corrosion resistance at high temperatures (up to 315 °C)
• Excellent thermal reflectivity
• Good abrasion resistance because of its surface hardness
•
Durability:
under normal conditions the AZ 150 coating grade will protect the steel substrate from corrosion for a minimum period of
15 years
.
To ensure security in case of fire in all electric air heaters are installed 2 heat protection thermostats:
•
First overheat protection
automatically
activates
if temperature reaches
50°C
, then protection disconnects heating elements,
until it has cooled. When the temperature falls to the working temperature, heater
automatically
switches on.
•
Second overheat protection
automatically
activates
if temperature reaches
100°C
, then protection disconnects heating ele-
ments, until it has cooled. In this case need to figure the cause of the overheating of the heater. Heater needs to be reset
manually
with the pushbutton on the heaters casing.
For easy duct connection heaters casing is with rolled rubber seals.
EKS NV PTC/PS, EKS NV PH (3X400V)
C – heating element
S1 - Automatic circuit
breaker
B - protection from overheat-
ing 50°C (automatic),
A - protection from overheat-
ing 100°C (manually),
J - Switch
K1..K5 - Contactor
PS – pressure relay
PTC - air flow sensor
V1, V2 – Triac
EKR-KN – Control board
TR 5 – external potentiom
-
eter
TJK10K – Temperature
sensor
X3...X26 – the control board
contacts (see. on PCB)
