American Water Heater SRCC OG-100, Instruction Manual

Page: 32 / 40

32
CMN:
Minimum collector temp.
Adjustment range:
50 to 195 °F
Recommended setting: 50 °F
Channel only available when
OCN is active
This function is unnecessary if the system backup heating ele-
ment has a set point maintained at 120 °F.
OCF:
Antifreeze function
Adjustment: OFF / ON
Recommended setting: OFF
This function is used to transfer heat from the storage tank to
the collector in order to avoid freezing of the heat transfer me-
dium in some system types.
Note: Since this function uses the limited heat quantity of the
tank, the antifreeze function should only be used in regions
with a few days of temperature around the freezing point. The
antifreeze function will be suppressed if the tank temperature
falls below 40 °F in order to protect the tank from frost damage.
If the system uses a 50/50 solution of propylene glycol and
water it is freeze resistant to -30 °F; therefore, this function is
not necessary.
There is an automatic antifreeze function for the heat exchanger
that activates R2 (100%) if the heat exchanger temperature
falls below 40 °F.
CFRO:
Antifreeze temperature on
Adjustment range:
38 to 48 °F
Recommended setting: 39
°F
Channel only available when
OCF is active
CFRF:
Antifreeze temperature off
Adjustment range:
40 to 50 °F
Recommended setting: 41
°F
Channel only available when
OCF is active
O TC:
Tube collector function
Adjustment: OFF / ON
Recommended setting: OFF
The tube collector function is only needed for systems that use
vacuum tube solar collectors.
This function is not necessary for this system.
OHQM:
Heat quantity measurement
Adjustment: OFF / ON
Recommended setting: OFF
If enabled a heat quantity measurement is possible for this
system in conjunction with the fl ow meter.
FMAX:
Volume fl ow in gal/min
Adjustment range:
0.0 to 5.0 gal/min in steps of
0.2 gal/min
Recommended setting: pump
station fl ow meter reading.
Channel only available when
OHQM is active
For OHQM to give an accurate reading the volume fl ow readable
at the fl owmeter (l/min) must be adjusted in the channel FMAX.
MEDT:
Type of antifreeze
Adjustment range: 0 to 3
Recommended setting: 1
Channel only available when
OHQM is active.
For OHQM to give an accurate reading the type of heat transfer
fl uid type(antifreeze) must be set in the channel MEDT:
0: water
1: propylene glycol
2: ethylene glycol
3: Tyfocor ® LS / G – LS
Caution: for this system type only type 1: propylene glycol
should be selected. Use of any other type of heat transfer fl uid
in this system may cause damage to the system or present a
health hazard