•Remove protecting caps from connection flanges. Caps only serve as
transport protection.
•Assembly only by using welding process 111 and 141.
6.3 Heat treatment of weld seams
Supplementary temper tests of weld seams are not required!
6.4 Drain piping
•Close valves (D1, D2, W1, W2) after mounting.
•Mount drain piping on drain valve (4) (to be provided by the customer).
Ensure that drain piping has free outlet to atmosphere and is
protected from pressure peaks!
7. Commissioning
7.1 Commissioning of unit together with the boiler
Check specifications of material, pressure and temperature!
•Close drain valve / plug.
•Fully open shutoff devices (D1, D2, W1, W2).
7.2 Commissioning of unit if boiler is already in operating
condition
•Close shutoff device (D2, W2).
•Fully open shutoff device (D1,W1) (if exists)and drain valve (4).
•Slightly open upper shutoff device (D2), carefully heat up glass holder with
steam until operating temperature is reached.
•Closed drain valve.
•Slowly open upper shutoff device (D2) and lower shutoff device (W2) as far
as it will go. Wait for alignment of water level. (If water level is not visible,
see special operating instructions shutoff valves / drain valve)
(If water level is not visible, see 9.1 General information and operating instructions “self-
closing ball”)
7.3 Re-tightening of screws
All screw connections except pressure screws
•Before commissioning of level gauge, check all screw connections: plugs,
valve and flange connections and screw caps of shutoff valves / drain valve
(see special operating instructions shutoff valves / drain valve.
•We suggest to observe the level gauge especially during first days after
commissioning.
•Re-tighten firmly screw connection where leakage appears.
Pressure screws
10
