Reflex Servimat M Mode D'emploi Original page 40

Commissioning
Description
p Static pressure
st
p Minimum operating pressure
0
p Supply pressure (pump "ON")
a
Static pressure range (control ball
valve RKH1 "CLOSED" / Pump
"OFF")
p Final pressure (control ball valve
e
RKH1 "ON")
p Safety valve actuating pressure
Sv
1 Suction pressure maintenance
• Device on the suction side of the system's circulating pump
2 Final pressure maintenance
• Device on the discharge side of the system's circulating pump
The "P " minimum operating pressure is calculated as follows:
0
Calculation
p = h /10
st st
p 0.0 bar
D
0.5 bar
d 60 - 100 % of the differential
p
pressure of the circulating pump
P ≥ p + p + 0.2 bar* (suction
0 st D
pressure maintenance)
≥ p + p + d + 0.2 bar* (final
st D p
pressure maintenance)
* Addition of 0.2 bar recommended, no addition in extreme cases
40 — English
Calculation
= static head (h )/10
st
= p + 0.2 bar
st
= p + 0.3 bar
0
= p + 0.5 bar
0
≤ p - 0.5 bar (for p ≤ 5.0 bar)
Sv Sv
≤ p x 0.9 (for p > 5.0 bar)
Sv Sv
= p + 1.2 bar (for p ≤ 5.0 bar)
0 Sv
= 1.1 x p + 0.8 bar
0
(for p > 5.0 bar)
Sv
Description
h in metres
st
for safety temperatures ≤ 100 °C
(212° F)
for safety temperatures = 110°C
(230° F)
Depending on the hydraulics
Enter the calculated value in the start
routine of the controller,  9.3
"Modifying the controller's start
routine",  43.
Servimat M/L — 25.07.2025
Calculation example for "P " minimum operating pressure:
0
Heating system: Static height 18 m, run-on temperature 70 °C (158° F), safety
temperature 100 °C (212° F).
Example calculation for suction pressure maintenance:
P = p + p + 0.2 bar*
0 st D
p = h /10
st st
p =18 m/10
st
p = 1.8 bar
st
p = 0.0 bar at a safety temperature of 100 °C (212° F)
D
P = 1.8 bar + 0 bar + 0.2 bar
0
P = 2.0 bar
0
 Note!
– The initial and final pressure of the following components must not
overlap with the actuating pressure of the safety valve.
• Control ball valve RKH1
• Pumps
– The actuating pressure must not fall below the minimum value of the
actuating pressure of the safety valve.
 Note!
Avoid dropping below the minimum operating pressure. Vacuum,
vaporisation and the formation of vapour bubbles are thus excluded.
7.3 Filling the device with water and venting
CAUTION
Risk of burns
Escaping hot medium can cause burns.
• Maintain a sufficient distance from the escaping medium.
• Wear suitable personal protective equipment (safety gloves and
goggles).
1 "PI" vacuum gauge
2 "DV" degassing valve
3 "FD" feed and drain cock
4 "AV" venting screw
1. Use the facility system to fill the device.
– After you have opened the "DC" ball valve, the vacuum spray pipe will
autonomously fill if the facility system provides sufficient water.
2. Optional
– Use the feed and drain cock to fill water into the device (3).
– Connect a hose at the feed and drain cock (3) of the "VT" vacuum
spray pipe.
3. Fill the vacuum spray pipe with water.
– Air escapes via the degassing valve (2) and the water pressure can be
read at the vacuum gauge (1).
5 "PU" pump
WC Make-up pipe
DC Degassing lines
EC Expansion pipe