CONTROL SYSTEM
11-13
SM VAR 1-A.1 GB
e. Heaters operation rules for RH groups:
1) In RH group, HE operation is according to the difference between RAT and
SPT.
-1
0
2
T=SP-R T [
o
c]
H E 1
H E 2
O N
O N
O FF
O FF
f.
OFAN Operation for RC and SH groups
1) As a general rule for RC and SH groups, excluding protection modes, OFAN
starts with the compressor.
2) When OFAN is ON it will operate according to the following conditions:
a) OFAN operates together with the compressor.
b) When
50
)
2
(
t
t
ICT
and
SPT
RT
and the 4.7k
:
resistor is not
connected to the OCT, OFAN will operate according to the following
curve:
0
3
O N
O F F
O C T
O F AN
CONTENT
