American Water Heater SRCC OG-300 Instruction Manual page 32

CMN:
Minimum collector temp.
Adjustment range:
50 to 195 °F
Recommended setting: 50 °F
Channel only available when
OCN is active
OCF:
Antifreeze function
Adjustment: OFF / ON
Recommended setting: OFF
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
OHQM:
Heat quantity measurement
Adjustment: OFF / ON
Recommended setting: OFF
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
MEDT:
Type of antifreeze
Adjustment range: 0 to 3
Recommended setting: 1
Channel only available when
OHQM is active.
This function is unnecessary if the system backup heating ele-
ment has a set point maintained at 120 °F.
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.
The tube collector function is only needed for systems that use
vacuum tube solar collectors.
This function is not necessary for this system.
If enabled a heat quantity measurement is possible for this
system in conjunction with the fl ow meter.
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.
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
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