Setting Outlet Pressure; Pressure Reducing Valve; Check Valve - Honeywell SG150 Notice De Montage

7. Assembly
7.1 Installations Guidelines
• Safety group must be fitted in the cold water supply
to the hot water storage unit
• Installation in horizontal or vertical pipeline possible
• The installation must be carried out so that:
o There are no shutoff valves or fittings, narrowing
of the pipework or strainers between the water
heater and the safety valve
o Good access is provided for service and mainte-
nance
o The safety valve is fitted above the top of the water
heater to avoid the need for draining down when
exchanging the safety valve insert
• If there is no drainage facility in the room where the
heater is installed, then the safety valve may be
fitted in an adjacent area. DIN 1988, part 2 is to be
observed
• Distance to the water heater approx. 1m
• While heating, water must escape in the discharge
line for safety reasons. Do not close off!
• The drain line of the membrane safety valve must be
viewable!
• If the drain guide is not connected directly with the
safety group, a discharge line must be installed
between the safety group and the drain guide!
• The discharge line must be performed to the size of
the safety valve discharge cross-section and may
not have more than 2 elbows and or be longer than
2m!
• If, for compelling reasons, more elbows or a greater
length becomes necessary, then the entire
discharge line must be designed to a larger nominal
width. More than 3 elbows, as well as lengths over
4m are not permitted!
• The discharge line must be installed with an incline!
7.2 Assembly instructions
1. Blow out or rinse pipe line out well
2. Install safety group in the cold water line
o Note flow direction
o Install without tension or bending stresses
Honeywell GmbH
GB
8. Commissioning

8.1 Setting outlet pressure

Set outlet pressure min. 1 bar under inlet pres-
sure.
1. Close shutoff valve on inlet
2. Release pressure on outlet side (e.g. through water
tap)
3. Close shutoff valve on outlet
4. Loosen slotted screw
o Do not remove slotted screw
5. Slacken tension in compression spring
o Turn control handle to the left (-) until it does not
move any more
6. Slowly open shutoff valve on inlet
7. Turn control handle until the setting scale shows the
desired value
8. Retighten slotted screw
9. Slowly open shutoff valve on outlet
9. Maintenance
DIN 1988, Part 8 specifies that the following
operations be carried out regularly.
A scheduled maintenance scheme is recom-
mended.
9.1 Inspection

9.1.1 Pressure reducing valve

Interval: once a year
1. Close shut off valve on outlet
2. Check back pressure using a pressure meter when
there is zero through-flow
o If the pressure is increasing slowly, the valve may
be dirty or defective. In this instance, carry out
servicing and cleaning
3. Slowly open shutoff valve on outlet

9.1.2 Check valve

Interval: once a year
1. Close shut off valve on outlet
2. Open check valve
o Until the pressure is released, some water will flow
out of the check valve. After a short period of time
the water flow should stop. If the water continues
to drip or run, then the backflow preventer must be
replaced - see servicing of backflow preventer
3. Close check valve again
4. Open shut-off valve again
9 MU1H-1355GE23 R0907