Nortec NHDI - Manual (Page 18)

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Note: The stated times are based on 100% steam
capacity. If the operation is at a lesser capacity, the
time should be extended accordingly. The servicing
intervals are set using the rotary switch “S2” on the
control board.
Drain Cycle
The following indications are provided for the set
flushing interval:
Left: Switch setting on rotary switch “S1”
Right: Set flushing interval
Note: The flushing interval is set on switch “S1” on
the control board.
Note: Water quality conditions resulting in
component failures are not covered under Nortec’s
standard warranty.
The factory settings are based on the following
water conditions when the unit leaves the factory.
Water
Parameters
NHSC NHDI
Conductivity 0-1500 MicroMhos 0-50 MicroMhos
Hardness 12 grains per gallon
(gpg) 0 grains per gallon
(gpg)
Silica 12 parts per million
(ppm) 0 parts per million
(ppm)
PH 6.5-7.5 7
Chlorides > 50 parts per mil-
lion (ppm) > 25 parts per mil-
lion (ppm)
Note: Should you have water conditions above the
stated parameters consult the factory for a new
blowdown setting to help improve your scale
management.
Chlorides – High levels of chlorides will attack
stainless steel. The solution would be to add an in-line
carbon filter that will remove up to 99% of the
chlorides. Consult the factory for additional information
if your water contains high levels of chlorides.
Nortec recommends performing a semi-annual
water analysis to ensure optimal performance.
Stand-by Heating
Stand-by heating activated (”on”) deactivated
(”off”).
Note: If stand-by heating is active the water
temperature in the steam cylinder is constantly kept at
approximately 70ºC (158ºF) by the control board.
Capacity Limitation
The set capacity limitation as a percentage of the
maximum capacity. Press both arrow keys at the
same time and a code will appear. Enter 8808 using
the arrow keys on the keypad and scroll down to the
Position Drain Interval At 100%
S1 Steam Capacity
0 0 Min.
1 720 Min.
2 360 Min.
3 180 Min.
4 120 Min.
5 60 Min.
6 30 Min.
7 20 Min.
8 10 Min.
9 5 Min.
Example:
Position Duration between
drain cycles
4:120
LCD
Display
Drain
Interval (S1)
NHSC/NHDI
Main Board
NHSC - DI NHSC(S1) NHDI (S1)
Model Setting Setting
010 4 1
015 4 1
020 5 1
030 6 1
045 7 1
065 8 1
090 8 1
135 8 1
180 8 1
Value Settings
Factory Settings
NOTE: Approximately 1 liter or
0.26 gallons will drain during
these intervals. Drain Water
Cooling will be active during
these intervals to temper the
drain water to 140 degrees F (60
degrees C) or less.
Figure #18
NHSC / NHDI Drain Cycle Parameters
drain cycle
4: 120
stand-by heating
off
power limit [%]
100