TM_i-BX(-N)_NC05_00_06_20_EN
MEHITS S.p.A.
●
TECHNICAL MANUAL
Version NC05 - Translation of the Original Instructions
51
4.13.5
DHW STORAGE TANK ANTIFREEZE
Protection is related to the value read by the DHW storage tank temperature probe (B3)
The involved resource is the DHW storage tank heater (NO10).
This function can be enabled by setting parameter
0228
= YES, and has the purpose of protecting the DHW storage tank from the formation of ice,
by activating the corresponding immersion heater when the water temperature falls to a certain value, which can be set using parameter
0229
.
The heater is activated based on the function described below:
ON
OFF
DHW heater
DHW storage tank T
(B3) [°C]
DHW antifreeze setpoint
(0229)
DHW antifreeze hysteresis (0230)
For the default values of the various parameters, see the parameters table
4.14
DEFROST
The defrost function can be enabled using the Manufacturer Menu (Mnu13), while the set defrost start and end parameters, time scales, etc., can be
found in the Assistance Menu (Mnu08).
The defrost type may be selected through parameter
132R
.
The “PRESSURE” type defrost follows the lo
gic of the chart below:
Max or less
Revolution
[rps]
Time
By pass
open
By pass
closed
20 sec
5-10 sec
20 sec
1-2 min
Hot-gas by pass
Defrost
(Max. 10 min)
134G
134H
134I
Max. acceleration ratio:
10rps/sec
Max. deceleration ratio:
2rps/sec
