Commissioning; Pre-Commissioning Exercises- Potable/Dhw Circuit; Pre-Commissioning Checklist - Mitsubishi Electric EHST20C-VM6HB Installationshandbuch

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Commissioning

Pre-commissioning exercises- potable/dHW circuit

Initial fill procedure:
Ensure all pipe joints and fittings are tight and secure.
Open the most distant DHW tap/outlet.
Slowly/gradually open the mains water supply to begin filling unit and DHW pipework.
Allow most distant tap to run free and release/purge residual air from installation.
Close tap/outlet to retain fully charged system.
note: When an immersion heater is fitted, do nOt energise the heater until the dHW tank is full of water. Also do nOt energise any immersion heater if any
sterilisation chemicals remain in the dHW tank as this will cause premature failure of the heater.
Initial flush procedure:
Energise system to heat-up cylinder unit contents to a temperature of approx. 30 - 40°C.
Flush/drain the water contents to remove any residue/impurities resulting from the installation works. Use the cylinder unit drain cock to safely discharge the warmed water
to drain via a suitable hose.
On completion, close drain cock, re-fill system and resume system commissioning.

Pre-commissioning Checklist

Before commissioning the cylinder unit system complete the following table to ensure the necessary checks are carried out.
no System commissioning checklist
1 Installation location
2
3 Water Quality and System Preparation
4 Pipework
5
6
7
8 Electrical wiring
9
10
11
12 Anti-freeze
13 Check pre-charge in the expansion vessel(s)
14 Pressurise primary heating circuit to 1 bar
15 Release air from system
Outdoor unit (PACKAGe type) operation checklist
16 Outdoor unit details
Power source (V)
17
Excessive vibration/noise
18
19 Unit mounted on anti-vibration pads (Tico Pads)
20 Provision made for condensate removal
For installation in hard water areas, see advice in section 4.2 General.
Notes/Comments:
Air flow around the unit
Maintenance access
Water quantity in the primary circuit
Total pipe length
Height difference
System chemically cleansed and
flushed
Insulation type and thickness
Correct cables used
Electrical maintenance access
Connection of mains power source
Connection of control cable
Refer to product guidelines. (Also see section 4.2 Note.)
Model No.
1ø L - N
3ø L1 - L2
Compressor
Fan
Outdoor unit
Cylinder unit
Outdoor unit
Outdoor to indoor
Outdoor to indoor
Outdoor unit electric cable
Indoor unit electric cable
Serial No.
L2 - L3 L3 - L1
Yes/No
Yes/No
Yes/No
Yes/No
notes
Good/Poor
Good/Poor
Good/Poor
L
m
m
Yes/No
Good/Poor
Type
Size
Type
Size
%
Yes/No
Yes/No
Yes/No
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