Heatcraft Refrigeration Products H-IM-79E Manuale Utente

 

•   

There is an on board 

room thermostat on

 

 

the Beacon II board which can be adjusted 

 

 

to the desired room temperature. The  

 

 

temperature differential is 2° F.

 

 

When a system is in the cooling mode and  

 

 

the box setpoint is 35°F, the system will  

 

 

continue to cool until the box temperature  

 

 

gets to 34°F. At this point the compressor  

 

 

will pumpdown and shut off. The system will  

 

 

restart cooling when the box temperature  

 

 

has risen to 36°F.

 

 

It is important to note that Beacon II  has  

 

 

a minimum 2 minute “

ON” time and a 

 

 

minimum 4 minute “

OFF” time. This 

 

 

means that the system will run in the cooling  

 

 

mode a minimum of 2 minutes even  

 

 

if the setpoint temperature is met. In  

 

 

applications where the system is grossly  

 

 

oversized, the box temperature could go  

 

 

below the differential temperature before the  

 

 

system cycles off.

 

 

In the “OFF” cycle the system will be off for 

 

 

a minimum of 4 minutes even if the  

 

 

box temperature goes above the differential  

 

 

temperature, before cooling will be restarted.

 

•    The on board 

room thermostat is factory 

 

 

set at 35°F for Air Defrost systems and 

 

 

 -10°F for electric defrost system. 

After all lines are connected, the entire system must be 
leak tested. The complete system should be pressurized 
to not more than 150 psig with refrigerant and dry 
nitrogen. The use of an electronic type leak detector is 
highly recommended because of its greater sensitivity 
to small leaks. As a further check it is recommended 
that this pressure be held for a minimum of 12 hours 
and then rechecked. For a satisfactory installation, the 
system must be leak tight.

Beacon II systems are shipped standard with a 

head 

master valve (scroll compressor models have a 100 PSI 
head master valve. All other models have a 180 PSI head 
master valve). The maximum system refrigerant capacity 
is the receiver capacity as listed in the sales literature 
plus the liquid line capacity. Do not add more refrigerant 
to the system than 90% of the receiver capacity.