7
Installation, operation and maintenance instructions - VMGFE102
Never exceed the specifi ed maximum operating pressures.
Verify the allowable maximum high- and low-side test
pressures by checking the instructions in this manual and the
pressures given on the unit name plate.
Do not use air for leak testing. Use only refrigerant or dry
nitrogen.
Do not unweld or fl amecut the refrigerant lines or any
refrigerant circuit component until all refrigerant (liquid and
vapour) has been removed from the heat pump. Traces of
vapour should be displaced with dry air nitrogen. Refri-gerant in
contact with an open fl ame can produce toxic gases.
The necessary protection equipment must be available, and
appropriate fi re extinguishers for the system and the
refrigerant type used must be within easy reach.
Do not siphon refrigerant.
Avoid spilling liquid refrigerant on skin or splashing it into the
eyes. Use safety goggles. Wash any spills from the skin with
soap and water. If liquid refrigerant enters the eyes,
immediately and abundantly fl ush the eyes with water and
consult a doctor.
Never apply an open fl ame (blowlamp) or overheated steam
(high-pressure cleaner) to the refrigerant circuit. Dangerous
overpressure can result.
During refrigerant removal and storage operations follow
applicable regulations. These regulations, permitting condi-
tioning and recovery of halogenated hydrocarbons under
optimum quality conditions for the products and optimum
safety conditions for people, property and the environment are
described in standard NFE 29795.
Refer to the certifi ed dimensional drawings for the units.
It is dangerous and illegal to re-use disposable (non-return-able)
reclaim bottles or attempt to refi ll them. When reclaim bottles
are empty, evacuate the remaining gas pressure, and move
them to a designated place for recovery. Do not incinerate.
Do not attempt to remove refrigerant circuit components or
fi ttings, while the machine is under pressure or while it is
running. Be sure pressure is at 0 kPa before removing
components or opening a circuit.
Do not attempt to repair or recondition any safety devices
when corrosion or build-up of foreign material (rust, dirt,
scale, etc.) is found within the valve body or mechanism. If
necessary, replace the device. Do not install safety valves in
series or backwards.
ATTENTION: No part of the unit must be used as a walkway,
rack or support. Periodically check and repair or if necessary
replace any component or piping that shows signs of
damage.
Do not step on refrigerant lines. The lines can break under the
weight and release refrigerant, causing personal injury.
Do not climb on a machine. Use a platform, or staging to
work at higher levels.
Use mechanical lifting equipment (crane, hoist, winch, etc.) to lift
or move heavy components. For lighter components, use
lifting equipment when there is a risk of slipping or losing
your balance.
Use only original replacement parts for any repair or com-
ponent replacement. Consult the list of replacement parts
that corresponds to the specifi cation of the original equip-
ment.
Do not drain water circuits containing industrial brines,
without informing the technical service department at the
installation site or a competent body fi rst.
Close the entering and leaving water shutoff valves and purge
the unit hydronic circuit, before working on the components
installed on the circuit (screen fi lter, pump, water fl ow switch,
etc.).
Periodically inspect all valves, fi ttings and pipes of the
refrigerant and hydronic circuits to ensure that they do not
show any corrosion or any signs of leaks.
It is recommended to wear ear defenders, when working near
the unit and the unit is in operation.
Always ensure you are using the correct refrigerant type
before recharging the unit.
Charging any refrigerant other than the original charge type
(R-410A) will impair machine operation and can even lead to
a destruction of the compressors. The compressors operating
with R-410A are charged with a synthetic polyol-ester oil.
Before any intervention on the refrigerant circuit, the
complete refrigerant charge must be recovered.
