Media of the LWM outdoor unit pumps
Grundfos pump
The pump is suitable for circulation of the following
media:
n
Pure, low viscosity, non-aggressive and non-
explosive media without solid or long-fibre
components
n
Mineral oil free coolants
n
Softened water
The kinematic viscosity of water is
ϑ
= 1 mm
2
/s (1
cSt) at 20 °C. If you use the pump to pump liquids
with a different viscosity, the max. pump pressure
will be reduced.
Example: A water-glycol mixture with 50% glycol
content has a viscosity of approx. 10 mm
2
/s (10
cSt) at 20 °C. Then the pumping capacity is
reduced by approx. 15 %.
No additives must be added to the water which
could impair the function of the pump.
The viscosity of the pumped medium must be
taken into account when designing the pump.
8
Emergency-heat
operation
If the outdoor unit fails, you can start emer-
gency-heat operation as follows:
1.
Pressing the REMKO logo in the top right
corner of the display takes you to the
"Expert” level. Enter the password "0321"
sequentially with the "+" and "-" key and then
confirm your entry by touching the "OK" field
in the bottom right corner.
2.
Deactivate the heat pump in the "Settings
⇒
Basic settings
⇒
System configuration" menu
point of the expert level. After the heat pump
has been switched off, the auxiliary heating
will be released.
3.
It is not necessary to manually set the set-
point on the electric heating element.
4.
The Smart-Control takes full control of heat
regulation and the activation of the heating
element.
In order to deactivate emergency-heat operation
again, the heat pump must be enabled once more
in the Expert level.
REMKO LWM series
22
Summary of Contents for LWM IM 300
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