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Contents Page
Positioning the Microvap Unit................................. 3
Steam Pipe Positioning........................................... 4
Steam Pipe Installation............................................ 5
Plumbing Connections............................................. 6
Internal Circuit Fusing / EMC aspects..................… 7
Power Supply Connections...................................... 8
Electrical Data...................................................…… 9,10
Control Circuit Connections..................................... 11, 12, 13
Master Slave Connection Options…........................ 14
Start-Up/Operation............................................…… 15, 16
Cylinder Exchange / Maintenance........................… 17
Trouble-Shooting Check-List.............................…… 18
Wiring Diagrams ……………………………………… 19, 20, 21, 22, 23
Important Installation Points
The unit must be installed to comply with national regulations and/or codes of practice. A qualified
electrician must carry this out.
Ensure at least 1000 mm clear side access to the electrical panel of the cabinet - left hand side of
standard cabinets, right hand side of cabinets with “-R” suffix.
Do not locate the cabinet where the ambient temperature around the unit could exceed 35
o
C e.g., an
unventilated roof mounted enclosure.
Do not locate the cabinet where a ladder is required for service access as this could make servicing
and cylinder service or exchange hazardous.
Make sure steam line(s) have adequate slope (min 12%) for condensate drainage and use condensate
separators if the pipe is lower than the unit.
Provide adequate support to prevent sags developing in flexible steam lines, which can fill with water
and create a "trap".
Do not locate vented drain directly under the cabinet.
Important Electrical Connection Items
Before commissioning the unit, check that all electrical (power) connections - including those at the
terminals and contactor are tight.
Check that the transformer primary winding connection is correct for the supply voltage at Vapac
terminals A1 & A2.
The Vapac transformer must not be used to power other equipment.
To comply with EMC aspects see recommendations on page 6.
Use a high-limit humidistat connected to control terminals 9 & 10 to ensure positive interruption of
unit operation when over-humidification is detected.
Important Maintenance Items
Only a qualified electrician should carry out maintenance.
The boiler contains hot water, and must be drained before any maintenance is carried out on the
steam section. This should be done prior to isolating the power, and removing the front access panel
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