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Heat recovery unit with cooling circuit - 

RCF

 -

0208-6180549-rev. 02

12

GB

Controls manual 

Recording operating hours

The  device  stores  the  number  of  operating 
hours  for  the  following  in  the  non-volatile 
memory:
• evaporator fan
• compressor.

Internal resolution is in minutes. 
The  values  can  be  displayed  by  accessing 
the  menu  with  the  label  Ohr  (see  menu 
layout).  The  whole  value  is  displayed  for 
values  below  999  whereas  hours/100  value 
along with the decimal point is displayed for 
values  above  999.For  example,  1234  hours 
are displayed as follows:

The  hours  can  be  reset  by  pressing  the 
DOWN button for two seconds (see buttons) 
while the operating hours are displayed.

 

In the event of a power failure, the last frac-
tion  of  hour  recorded  is  set  to  0  and  the 
duration is rounded off by default.

Defrosting

The defrost function is only active in Heating 
mode.
This  function  is  used  to  prevent  the  forma-
tion of ice on the surface of the external heat 
exchanger. 
This  significantly  reduces  the  thermodyna-
mic performance of the unit and could cause 
it severe damage. 

Defrosting  is  controlled  according  to  pres-
sure.
Defrost start and stop commands are given 
on the basis of condensation probe readings 
and parameter settings, as described below.

Defrost mode start (fig. 01)

If the condensing pressure is lower than 3 bar  
(defrost starting pressure) and the compressor 

is  ON,  the  control  starts  the  defrost  coun-
tdown (1 min countdown). When 1 min pas-
sed, the control device starts the defrosting 
process.  At  this  point  Pad06  (compressor..
valve time delay) = 30 sec., the control proce-
dure described in fig. 01 is operated.
This  delay  prevents  the  compressor  from 
liquid  returns.  During  this  operation  the 
safety timings of the compressor are not con-
sidered. The  defrost  starting  and  stopping 
pressures are the following: 
• defrost start: 3 bar
• defrost stop: 10 bar. 

Defrost mode stop (fig. 02)

The defrosting process stops if: 
•  the  condensing  pressure  raises  up  to  the 
defrost stop pressure,
• the defrosting process doesn’t stop in 5 min  
(max. defrosting time). 

Counter mode

•  The  defrost  time  counter  is  interrupted 
when  temperature/pressure  rises  above  Pa 

d02  (defrost  start  temperature/pressure)  or 
the compressor is turned off.
• The counter is reset following one of these 
events: defrost cycle performed; power failu-
re; change in operating mode. 
• The counter is also reset when the tempe-
rature/pressure  rises  above  Pa  d04  (defrost 
end temperature/pressure).

Power failure

If there is a power failure, when the power is 
restored the control returns to the state prior 
to  the  power  failure.  If  defrosting  is  in  pro-
gress, the procedure is cancelled. All timing 
in progress is cancelled and restarted. 

  12.3

35.48

35

Pa d06

ON

OFF

ON

OFF

COMPR

RV

Pa d06

SD

COMPR: compressor
RV: reversing valve
SD: start of defrosting

fig. 01

Pa d07

ON

OFF

ON

OFF

COMPR

RV

Pa d07

FD

COMPR: compressor
RV: reversing valve
FD: end of defrosting

fig. 02

Summary of Contents for RCF Series

Page 1: ...0208 6180549 rev 02 FAST S p A CONTROLS MANUAL GB HEAT RECOVERY UNITS WITH COOLING CIRCUIT RCF SERIES...

Page 2: ......

Page 3: ...ristics 6 Installation of remote panel 6 Wiring of remote panel 7 User interface 7 Men levels 9 Components 10 Functions 11 Diagnostics 13 Parameters setting 16 Parameters 17 Technical characteristics...

Page 4: ...oys Seamless round copper tubes for air conditioning and refrigeration 2 designed manufactured and commercialized in compliance with the following EEC Directive PED safety 97 23 CE Machinery safety 98...

Page 5: ...ly limited through the use of technical protection means and measures G E N E R A L H A Z A R D S I G N A L Carefully adhere to all the indications n e x t t o t h e i c o n Failure to comply with the...

Page 6: ...assword inside the electrical panel remote panel max distance 150m to be connected directly to the unit wiring cable not included Troubleshooting The controls check and mark the fol lowing possible fa...

Page 7: ...onfigured as digi tal inputs with parameters Pa H05 Pa H06 Pa H08 8 digital inputs are therefore available Wiring of remote panel Important Never connect the keyboard when the instrument is on Avoid s...

Page 8: ...r more than 2 seconds you move one level up If the last level of a menu is displayed press the button and release it within two seconds to go up one level In men operating mode it shows the pre vious...

Page 9: ...D d I s r e t e m a r a P r A P d r o w s s a P s s P e u l a V g n i l o o C t e S e u l a V g n i t a e H t e S e u l a V t u p n I e u g o l a n A s u t a t S t u p n I l a t i g i D x e d n I r e...

Page 10: ...and start up of the same com pressor compressor on off safety time con trolled by parameter Pa C01 This parameter also applies to when the device is started up ON OFF Pa C01 Pa C02 Time COMPR Pa C01...

Page 11: ...cooling and freeheating are used to cool or heat the internal environment using outdoor air The external air enters the environment through a damper that mixes it with the recirculated air from insi d...

Page 12: ...e compressor is ON the control starts the defrost coun tdown 1 min countdown When 1 min pas sed the control device starts the defrosting process At this point Pad06 compressor valve time delay 30 sec...

Page 13: ...rms are sampled every 225 seconds Example if the number of events is set to 3 the duration of the alarm must last between 2 225 seconds and 3 225 seconds for the alarm to be switched from automatic to...

Page 14: ...OFF ON Automatically reset unless alarm events per hour reaches the value of parameter Pa A08 after which it is manually reset Not active when Pa A07 time is counted after a compressor is turned on E0...

Page 15: ...d as worn filters see digital inputs remains inactive for a period of time equal to Pa A05 Not active when the Pa A03 time is counted after fan is turned on OFF OFF3 Reset is carried out automatically...

Page 16: ...e contact is open The ID4 is configured as active when the contact is closed The ID5 input is configured as active when the contact is closed Relay 1 is connected to the compressor Relay 2 is connecte...

Page 17: ...ermal switch 2 Worn filters 3 Remote Heating Cooling 4 Remote ON OFF 5 Thermal switch compressor 2 6 Request for second compressor capa city step 7 damper opening Pa H22 Configuration of output NO2 0...

Page 18: ...a A01 Low pressure pressure switch by pass time Determines the delay between starting up the compressor and starting up the low pres sure digital alarm diagnostics It is expressed in seconds Pa A02 Nu...

Page 19: ...eating mode 3 continuous operating of fan in cooling mode on request in heating mode 4 continuous operating of fan in heating mode on request in cooling mode Pa P02 Delay between fan ON and com presso...

Page 20: ...if Pa H49 1 la temperatura al di sotto la quale viene avviato il ciclo di sbrinamento Pa d09 Temperature at which defrost ends if Pa H49 1 Temperature above which the defrost cycle is ended Pa d10 En...

Page 21: ...Enables dynamic set point 1 0 1 Flag 0 Pa H32 Dynamic set point off set in cooling mode 50 12 7 12 7 C 1 0 Pa H33 Dynamic set point off set in heating mode 0 12 7 12 7 C 1 0 Pa H34 Outdoor temperatur...

Page 22: ...Pa C02 ON ON safety time 36 0 255 Seconds 10 20 Pa C03 Temperature control hysteresis in cooling mode 15 0 25 5 C 2 Pa C04 Temperature control hysteresis in heating mode 15 0 25 5 C 1 5 Pa C05 Regula...

Page 23: ...eed in heating mode 100 0 100 80 Pa F17 Minimum fan speed temperature pressure set point in heating mode 100 500 800 C 10 kPa 10 180 Pa F18 Proportional band in heating mode 100 0 255 C 10 kPa 10 40 P...

Page 24: ...2 AWG 16 28 1 5 way p2 5 5 way connector with remote control and copy card programming AWG 24 30 1 2 3 way connector remote keyboard AWG 22 30 Display and LEDs 3 digits sign 5 red LEDs Buttons 2 butt...

Page 25: ...ntegrated In terms of automatic operating featu res as a type 1 action control device with reference to manufacturing tolerances and drifts As a class 2 device in relation to protec tion against elect...

Page 26: ...NOTES...

Page 27: ...ht to introduce at any time whatever modifications deemed necessary to the improvement of the product FAST S p A TRATTAMENTO DELL ARIA 35044 Montagnana PD Italy Via Luppia Alberi 170 Tel 39 0429 80631...

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