M039150CF
16
Pressure adjusting range
The pressure adjusting range, upstream the gas valves group, changes according to the spring provided with the valve group.
Siemens VGD valves with SKP actuator:
Hidraulic system
The pumps that are used can be installed both into single-pipe and double-pipe systems.
Single-pipe system:
a single pipe drives the oil from the tank to the pump’s inlet. Then, from the pump, the pressurised oil is driven to
the nozzle: a part comes out from the nozzle while the othe part goes back to the pump. In this system, the by-pass pulg, if provided,
must be removed and the optional return port, on the pump’s body, must be sealed by steel plug and washer.
Double-pipe system:
as for the single pipe system, a pipe that connects the tank to the pump’s inlet is used besides another pipe that
connects the pum’s return port to the tank, as well. The excess of oil goes back to the tank: this installation can be considered self-ble-
eding. If provided, the inside by-pass plug must be installed to avoid air and fuel passing through the pump.
Burners come out from the factory provided for double-stage systems. They can be suited for single-pipe system (recommended in the
case of gravity feed) as decribed before.To change from a 1-pipe system to a 2-pipe-system, insert the by-pass plug
G
(as for ccw-rota-
tion- referring to the pump shaft).
Caution:
Changing the direction of rotation, all connections on top and side are reversed.
HP60 - HP65: Suntec AJ6
HP72: Suntec E7/ Danfoss RSF41
HP73A: Suntec TA2 / Danfoss KSM50
Siemens SKP actuator
Performance range (mbar)
0 - 22
15 - 120
100 - 250
Spring colour
neutral
yellow
red
Suntec AJ6
SUNTEC E7 1001
DANFOSS RSF41
2
1
Keys
1 spring
2 cap
G
G
Single pipe installation
Twin pipe installation
