Start-Up; Maintenance; Disposal - Honeywell SM120 Installation Instructions Manual

7.2. Assembly instructions
The safety valve may not be overheated through
welding and soldering work on the system. Install the
safety valve only after these tasks are completed.
1. Thoroughly flush pipework
2. Install the membrane safety valve
• Tighten the connections with max. 18 Nm when joining.
Cracks may form in the material when tighten to
strongly which may cause leaks in the system.
• Installation in horizontal pipe with safety cap pointing up
• Note flow direction
• Install without tension or bending stresses
3. Install dischar0213ge line
Risk of scalding through hot liquid escaping from the
discharge opening.
Route discharge line so that neither personal injuries
nor property damage can be caused by discharged
fluid.
The discharge opening is marked by an arrow on the
valve body
4. Guide the outlet of the discharge line into a drain or
container which can accept the total content of the
system.
If there is a risk that the discharge line becomes
clogged or can freeze, interrupt the discharge line, e.g.
by a funnel. The discharge line of the funnel must have
twice the cross-section of the safety valve intake

8. Start-up

1. Mount a warning sign readily visible near the discharge
line or on the safety valve with the following text:
While heating, water must escape from the
discharge line for safety reasons. Do not close!
2. Make sure that all water connections are tight
3. We recommend flushing the supply line before commis-
sioning the plant
MU1H-1324GE23 R0213
GB

9. Maintenance

In accordance with DIN 1988, Part 8, the following operations
should be carried out regularly. A planned maintenance
scheme is recommended.
9.1. Inspection
To be carried out by an installation company or the
operator.
Frequency: every 6 month
Risk of scalding through hot liquid escaping from the
discharge opening.
Function check by verifying the response: While the system is
operating, briefly open the safety valve by turning the cap.
After closing the cap the valve must close again the backed
up water drain completely.
9.2. Maintenance
To be carried out by an installation company
Interval: once a year
Risk of scalding through hot liquid escaping from the
discharge opening.
If a malfunction is detected, a repair can be attempted by
opening and closing the cap several times. A replacement is
necessary if this action is not successful.

10. Disposal

• Brass housing and spring bonnet
• Hot water resistant elastomer diaphragm and seal disc
• High quality synthetic material venting knob
Observe the local requirements regarding correct waste
recycling/disposal!
6 Honeywell GmbH