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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the EXP settings
18.10.2002
5.34 Prerun time of heat pump circulator and water
/ brine pump
•
Updating the values at the temperature sensors
Prior to starting the compressor, heat pump circulators Q9 and Q17 as well as water /
brine pump Q8 (only with partial diagrams
WP3
and
WP4
) must be activated, enabling
sensors B21, B71 and B11 to acquire correct temperatures. On this operating line, the
prerun time can be matched to the actual plant conditions.
Setting range
Unit
Factory setting
5...240 s
15
5.35 Overrun time of heat pump circulator and
water / brine pump
When the compressor is switched off, both the heat pump circulator and the water /
brine pump will overrun for the period of time set here.
Setting range
Unit
Factory setting
5...240 s
15
5.36 Minimum compressor on time
•
Prevents premature switching off of compressor after startup
Frequent switching on / off of compressor causes wear and tear. The minimum com-
pressor on time after startup can be set on this operating line.
Setting range
Unit
Factory setting
0...60 min
15
If the maximum switch-off temperature is exceeded (operating line 400
EXP
), the com-
pressor will be switched off, even if the minimum compressor on time has not yet
elapsed.
Benefit
Description
Setting
Description
Setting
Benefit
Description
Setting
Note
