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Tab. 1. Heaters technical data
3. Heater Installation
3.1 Assembly in tank
A. Type of tank
The tank and its connections must be made of metal. EJK heater design
provides a protective circuit by connecting protective conductor from a power
cord to the metal head. That connection is permanently made inside the body
of a heater.
B. Working position
During operation heating elements and the sensor protection must be
totally immersed in water and free thermally forced water circulation must be
ensured. The length of the coupling for assembling the heater shall not exceed
circa 100 mm so that it does not stand out from the heating elements dead
zone (unheated zone). The heater may only operate in horizontal or semi
horizontal position. Heater casing must not be covered nor thermally
insulated as it would disturb normal operation of the temperature controller
and of the temperature limiter installed in the casing. When assembling the
heater make sure that heating elements length fits into the tank and that they
do not touch any internal parts of the tank, such as heat exchangers or
thermometric pipes.
C. Pressure tanks
The heater is adapted for installation in pressure tanks of an admissible
pressure not higher than 10 bar. All the assembly, installation and service
conditions for these tanks (boilers) must be observed. It is also absolutely
obligatory to install a safety valve with the opening pressure not higher than
indicated in the tank operating parameters. Valve flow capacity should be
chosen taking into account the power of all heaters and heat exchangers
Power
Supply
voltage
Dead zone
length
Immersion
depth to the
gasket
Threaded
connection
Minimum
tank volume
Heater type
[kW]
[V]
[mm]
[mm]
[inch]
[dm³]
EJK - 3000
3.0
3 ~ 400
100
290
1 ½”
80
EJK - 4500
4.5
3 ~ 400
100
390
1 ½”
100
EJK - 6000
6.0
3 ~ 400
100
500
1 ½”
100
EJK - 9000
9.0
3 ~ 400
100
720
1 ½”
250
