Heating engineer
24
3
3.2.4.3
K18 Simplygas hydraulic diagram with OQLT021 system controller
Figure 3.3
K18 Simplygas C1 with OQLT021 system controller
1
K18 Simplygas C1 heat pump
2
Enclosed modulating water pump, 40 kPa available head
3
Anti-vibration connection
4
Pressure gauge
5
Sludge filter
6
Shut-off valve
7
3 bar safety valve
8
Expansion tank
9
GHP immersion temperature probe (standard) to be installed on heating
circuit (see Paragraph 3.2.4.4
10 3-way diverting valve for heating/DHW management (available as
OVLV007 optional)
11 DHW buffer tank, 200 or 300 liter, 3 or 4 sqm coil (available as optional
OSRB012 or OSRB004)
12 Immersion temperature probe (available as OSND004 optional)
13 System controller (required optional OQLT021)
14 Outdoor temperature probe (standard with OQLT021)
15 Auxiliary boiler (optional)
16 Check valve (to be installed only in the presence of an auxiliary boiler)
17 GHP' immersion temperature probe (only in the presence of an auxiliary
boiler, available as OSND004 optional)
18 Advanced room unit (optional supplied as per standard with OQLT021, to
be placed, preferably, in a heated room)
A
Gas connection
B
Auxiliary boiler group (optional)
C
Buffer tank group min 100 l (optional)
D
Heating distribution circuit, to be carried out as described in Paragraph
3.2.4.4
The components enclosed in dotted rectangles are optional.
P
1
2
ST
14
13
12
11
10
3
A
4
5
6
7
8
B
16
C
ST
17
ST
9
D
15
18
3.2.4.4
Heating distribution
Direct heating distribution with single zone (system with primary water circuit only)
Figure 3.4
Heating distribution 01 - direct
1
GHP immersion temperature probe (standard)
2
Radiator
A
Connection to K18 unit (GHP plant water temperature probe)
Water flow
Water circulation must always be guaranteed, e.g. to
enable the unit's antifreeze function to be carried out
correctly. Leave a radiator without a valve (thermostatic
or manual), or create a outlet/inlet bypass equipped with
overpressure valve set to open only when all the radia-
tors are closed, as shown in Figure 3.5
