Xylem MOH2 Multi zone mixing module (obsolete) - Manual (Page 15)

15
Installation and operation manual MOH2
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Pressure test
• Pressurize the pressure hose
• Now all heating loops including the compression fittings are being
pressure tested.
Start-up
Preconditions:
• The system boiler loop must be filled properly.
• The floor heating system must be filled properly
• A suitable control for the MOH2 module must be in place. Caution:
operation without a suitable control can result in overheating of the floor
heating system.
• The bypass valve must be set in accordance with the control method
selected and the system parameters.
• The presetting knob must be set correctly for the system.
• The heating loops must be open.
• The connection to the boiler loop [ball valves 10 and 11] must be open.
Start-up
• If the preconditions are met, the system can be started up.
• First switch on the control.
• The first heating up of a floor heating system can take a long time since
the floor can absorb a lot of heat. Additionally, in new construction, the
high humidity in the slab can delay the heat up process.