4
®
The complete Spark and Sense HTSS igniter consists of an igniter rod with ignition & ionization electrode to
be inserted in the gas igniter, a 5 metre HV cable and a power pack box containing high-voltage ignition
transformer and the burner controller module option. See description below:
Rods
The rod of the
HTSS-type
ignition device has an
insertion
length ”L1” in range of 0.65 to 3.15 metres
.
This means that the rod can be inserted into the gas igniter not more than L1 to the ignition point
.
This length
corresponds with
SP-32-NG/PG-FD-xxx,
SP-32-NG/PG-ND-xxx
,
SP-48-NG/PG-ND-xxx
or
SP-
48-NG/PG-FD-xxx
gas pilot reference insertion length “L” indicated in HTSS and SP-32/48 Part
Numbers as “-xxx” in metres
.
L range is 0.5 to 3.0 m and length L1= L + 0.15 m.
The
HTSS
rod comprises 2 parts:
–
the basic part of rod of the required length (defined by L – “xxx”) is constructed of stainless steel outer tube
(16 mm OD) with centrally positioned electrode ended with an internal spring loaded connector,
designed to receive the replaceable tip,
–
the replaceable
HTSS
tip, available in two variants: 160 mm long P/N
HTR-TIP
or 460 mm long P/N
HTR-TIP-L
both with a further 40-60 mm electrode tip used for "sensing" the flame.
For ignition, on tip’s central electrode there is a
special spherically shaped plate.
It ensures correct position
of the electrical arc in the air-gas mixture flow, between electrode and the outer tube edge and thereby
provides effective ignition. The central electrode tip must be in gas flow continuously.
Attention: The short tip is used on the shortest rods of length L=0.5, 0.6 and 0.7 only
.
All rods 0.8 m long and longer are equipped with the long tip.
When the voltage from the transformer is applied to the
HTSS
rod, the electric arc is generated on the tip and the
gas-air mixture on gas igniter/pilot nozzle should be ignited.
3 versions of the ignition rod are available (see Fig.2):
–
Part No
HTSS-xxx-J
(
xxx = length in metres
- see p. 11 ORDERING INFORMATION) - with j. box
IP67, replaceable tip, for use in safe area only, including separate 5 m HV cable,
–
Part No
HTSS-xxx-CEX
(
xxx = as above
) - with an integrated 5 m long, shielded HV cable (no j. box)
connected with the rod via IP66 gland, replaceable tip, ATEX certificate for use in hazardous Zone 1,
–
Part No
HTSS-xxx-J-CEX
(
xxx = as above
) - with Exd j. box, IP66, replaceable tip, ATEX certificate
for use in hazardous Zone 1, including separate 5 m shielded HV cable
.
The basic part of explosion-proof rod
HTSS-xxx-CEX
and
-J-CEX
is constructed such that the rear section of
the outer tube is potential-free, thus ensuring that there is no potential source of ignition in an explosive
atmosphere during normal igniter operation. Despite this, there is also a grounding screw on the end of the rod
or junction box which must be connected to the protective grounding system of the installation (see Fig. 5, 6).
The
HTSS-xxx-J
rod outer tube is not potential free so it must be grounded via grounding screw to the burner
control ionization circuit grounding point (terminal 11 on Fig. 4). This rod is for use in safe area only.
Cables, rod connection
The ignition cable used in the safe area is single wire conductor. It is connected to the phase output of the
transformer's secondary circuit (see Fig. 1, 3, 4). The other end of HV cable central wire is connected to the HOT
screw terminal in j.box of rod P/N
HTSS-xxx-J
(Fig. 6).
A separate ionization circuit grounding cable should connect the ground screw on rod j.box (outside) with
ground terminals in power pack (Fig. 1, 3, 4, 6).
The ignition cable for use in hazardous areas is of the shielded single-wire type. The HV cable is connected to
igniter rods the following way (see Fig. 1, 3, 5, 6):
–
the rod P/N
HTSS-xxx-CEX
: integrated shielded cable is permanently connected to the rod -
cable wire to
the rod’s
central electrode, shield is connected to the outer tube of rod (see description of rod above)
–
the rod P/N
HTSS-xxx-J-CEX
,
inside rod j.box
: connect cable central wire to
the HOT screw terminal,
connect cable shield to the NEUTRAL / GROUND screw terminal.
Inside the power pack enclosure the shield is connected to the grounding terminal and the central wire to the phase
output of the transformer's secondary circuit (see Fig. 5).
Notice: The 5 m long cable is included in each rod P/N. However it can be ordered as a replacement in
5 or 10 m long pieces – see p. 3 and 11 for P/N and specification.
