Raypak VERSA IC, Инструкция по установке и эксплуатации

Страница: 42 / 80

42
2. Tank Differential (TANK DIFF)
Tank Differential is subtractive to the set-point. For
example, in the case of a TANK SETP set-point of
130°F with a 6°F differential, the control will ener-
gize the heater when the tank temperature drops
to 124°F and then will shut the heater off at 130°F.
The Tank Differential defaults to 5°F with a range
of 2°F to 10°F. This value is only available to
set/change when the PIM™ identity is “WH”.
3. Pool Differential (POOL DIFF)
Pool Differential is subtractive to the set-point. For
example, in the case of a POOL SETP set-point of
80°F with a 2°F differential, the control will ener-
gize the heater when the pool temperature drops
to 78°F and then will shut the heater off at 80°F.
The Pool Differential defaults to 2°F with a range
of 1°F to 5°F. This value is only available to
set/change when the PIM™ identity is “P”.
4. Indirect Differential (IND DIFF)
Indirect Differential is the differential for the indi-
rect DHW tank temperature. It is subtractive to the
set-point. For example, in the case of an IND
SETP set-point of 130°F with a 6°F differential, the
control will energize the heater when the tank tem-
perature drops to 124°F and then will shut the
heater off at 130°F. The Indirect Differential
defaults to 6°F with a range of 2°F to 10°F. This
value is only available to set/change when the
PIM™ identity is “H” and MODE = 2 or 3 and DHW
SENS = ON.
System Pump Purge (SYS PURGE)
The VERSA IC
®
Control continues to operate the sys-
tem pump after the system is shut down, either by
removing the enable closure or by warm weather shut
down (when used). When SYS PURGE is set to OFF,
there is no system pump post purge. The default tim-
ing is 20 sec, but can be adjusted from 20 sec to 20
minutes.
Maximum Target Boiler Temperature
(TARGET MAX)
This is the maximum target temperature that the boil-
er can be set to. This value is only available to
set/change when the PIM™ identity is “H”. The range
of adjustments is for XFyre 50 to 192°F, XPak-FT 50
to 192°F, MVB / XTherm 50 to 220°F. Refer to the spe-
cific product I&O Manual for this information.
Minimum Target Boiler Temperature
(TARGET MIN)
This is the minimum target temperature that the boiler
can be set to. This value is only available to
set/change when the PIM™ identity is “H”. The range
of adjustments is from 50°F to 180°F.
Indirect Sensor Selection
(IND SENSOR)
This setting determines whether a DHW sensor or an
aquastat will control the indirect DHW tank tempera-
ture. This value is only available for set/change when
the PIM™ identity is “H”, the MODE = 2 or 3. The set-
ting can be “ON” or “OFF”. The default value is “OFF.”
Contact closure is required for operation across the
IND DHW Override terminals when using the IND
Sensor option.
Target Indirect DHW Temperature
(IND SETP)
This is the target indirect DHW water temperature set-
ting when a DHW sensor is selected. This value is
only available for set/change when the PIM™ identity
is “H”, the MODE = 2 or 3 and the DHW SENSOR =
ON. The range of settings is 50°F to 180°F. The
default value is 140°F.
Target Boiler Temperature for DHW
Heat Exchanger (IND SUPPLY)
This is the target boiler temperature for the DHW heat
exchanger during indirect DHW operation. This value
is only available to set/change when the PIM™ identi-
ty is “H”, the MODE = 2 or 3 and the DHW SENSOR =
OFF. The range of settings is 70°F to 200
°F
not to
exceed "Target Max".. The default value is 180°F.
This setting is only available when using an aquastat
in the indirect tank in lieu of a 10k Ohm sensor. When
using a sensor this setting is defaulted to the IND
SETP plus 40
°F
, not to exceed Target Max.
Selection of Indirect Priority
(IND PRIORITY)
This selects whether or not indirect DHW priority is
active during indirect DHW operation. This value is
only available to set/change when the PIM™ identity is
“H”, the MODE = 2. The setting can be “ON” or “OFF”.
The default value is “OFF”. Mode 3 requires priority
functionality due to the piping configuration.
CAUTION: When using the IND Sensor it is recom-
mended that the operator setpoint dial on the PIM™
be set for DHW Target temperature to prevent an
over-temperature condition from occurring. An aqua-
stat may be installed on the discharge pipe of the
indirect DHW tank to act as a secondary limit.