Camus Hydronics DFH/W2000 - Variable Frequency Drive and Frost Protection; Variable Frequency Drive (VFD) Parameters; Frost Protection Algorithm

47
6.7 VARIABLE FREQUENCY DRIVE
The variable frequency drive (VFD) has a factory set
security code which has to be entered before any
adjustments can be made. The VFD has 50 parameters,
which can be adjusted. At present only the following are
pertinent:
Table 13: Variable Frequency Drive Parameters
Paramete
r
#
Function Settings
1
High/Low Voltage
Input Voltage 120, 220-
240, 460-480
01
02
2
Carrier Frequency
03
4
Stop Method
03
5
Standard Speed Source
04
19
Acceleration Time
120 sec
20
Deceleration Time
60 sec
28
Fixed Boost
1.0
36
Pr
eset Speed
29
38
Skip Bandwidth
3.0
45
Speed at Minimum
Signal
Consult factory test
sticker
46
Speed at Maximum
Signal
Consult factory test
sticker
50
Fau
lt History
View Only
51 thru 58 Miscellaneous View Only
6.8 FROST PROTECTION
The DynaFlame® with SOLA control panel is equipped with
a heat exchanger frost protection algorithm where if the
boiler inlet or outlet temperature sensors drop below 41
o
F
(5
o
C) the boiler pump is enabled. If the temperature
continues to drop to 38
o
F (3.3
o
C) the burner will be fired to
bring the inlet and outlet temperatures to 50
o
F (10
o
C) to
prevent freezing of the heat exchanger.