Operating Instructions and Installation Instructions

ULTRAMAX PB 65 - 120
29 L290 ©MHS Boilers 13/12/2010
10.0 Commissioning cont.
10.2 Control Measures
An authorised specialist shall perform the initial commissioning only.
In general, the following control checks must be performed prior to commissioning:
Check power supply.
Check pressure in heating system.
Check pressure at gas connection.
Check gas supply for leaks.
Check proper assembly of exhaust accessories.
Check condensate discharge for leaks.
10.3 Minimum circulation amounts / Flow monitoring
You must ensure that the system has sufficient hydraulic flow upon heat demand. The system is equipped
with a flow safety device, which monitors the through-flow. In order to maintain a minimum flow, the
installation of a switch or a plate heat exchanger (both available as accessories) is recommended, or the
connection of the Ultramax PB to an open manifold.
10.4 Ensure prior to commissioning
Sufficient dimensions of the expansion container must be ascertained. Comply with notes on water
quality, fill with softened water if necessary.
Commissioning of system and venting shall take place immediately after the filling process in order to
eliminate standing air pockets as a centre of corrosion.
Commissioning at low system temperatures and maximum through-flow of the heating system avoid
calcium deposits inside the boiler.
During inspection work the complete exchange of the system water should be avoided. This can be
accomplished through partial shutoffs or through re-use of retained and filtered system water.
WARNINING: WHEN THE COVERS ARE REMOVED AND THE BOILER IS IN OPERATION, IT IS
POSSIBLE FOR DEBRIS TO BE DRAWN INTO THE FAN INLET.
NOTE: THE BOILER IS EQUIPPED WITH AN AUTOMATIC RESTART FACILITY AND WILL ATEMPT TO
FIRE MORE THAN ONCE. IN THE EVENT THE BOILER FAILS TO IGNITE AFTER 4 UNSUCCESSFUL
ATEMPTS THE BOILER WILL GO TO LOCKOUT AND REQUIRE MANUALLY RESETTING.