DOMINATOR INSTALLATION AND OPERATION INSTRUCTIONS
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Mode 3: Domestic Hot Water (DHW) generation.
Dominator piped in parallel with the storage tank. DHW
demand from sensor located in tank or pool supply pipe.
The fi ring stages are operated to provide a setpoint
temperature and maintain DHW tank temperature.
DHW OPERATION - The control operates to maintain
the programmed tank target temperature at the outlet
sensor whenever a DHW demand is present. A DHW
demand is generated whenever the temperature sensed
by the DHW sensor drops below the programmed tank
target temperature by 1/2 the programmed differential,
adjustable from
2 to 10°F
,
-17 to -12°C
. The demand
remains until the temperature sensed by the DHW
sensor rises above the programmed tank target
temperature plus 1/2 the programmed differential.
Mode 4: Outdoor reset control.
Dominator piped in
parallel with the system. The fi ring stages are operated
to provide outdoor reset temperature control at the
boiler/water heater outlet.
OUTDOOR RESET OPERATION - The control operates
the water heater/boiler stages to maintain the calculated
target supply temperature at the boiler outlet sensor. The
temperature is calculated by the outdoor reset feature,
which increases the target boiler outlet temperature as
outdoor temperature drops. Whenever the outdoor
temperature is greater than the WWSD (Warm Weather
Shut Down) setting, the control ignores the call for heat.
OUTDOOR RESET WITH DHW OPERATION - A DHW
tank controlled by a pump provides reset override
whenever DHW generation is required. In Mode 4, reset
override will occur if the staging controller receives a
signal across the "STPT DEM" and "DEM SIG"
terminals of the terminal strip. (i.e., closing a tank
aquastat switch wired to these terminals). In this case,
the control will temporarily override outdoor reset and
increase the target temperature to
180°F
,
82°C
to
provide suffi cient heat to satisfy the DHW requirement.
Mode 5: Outdoor reset control.
Dominator piped in
primary/secondary confi guration. An additional system
sensor is required to properly control the system supply
(primary loop) temperature. The firing stages are
operated to provide outdoor reset temperature control
in the primary loop.
OUTDOOR RESET OPERATION - The control operates
the water heater/boiler stages to maintain the calculated
target supply temperature at the supply sensor. The
temperature is calculated by the outdoor reset feature,
which increases the target supply temperature as
outdoor temperature drops. Whenever the outdoor
temperature is greater than the WWSD (Warm Weather
Shut Down) setting, the control ignores the call for heat.
OUTDOOR RESET WITH DHW OPERATION - A DHW
tank controlled by a pump provides reset override
whenever DHW generation is required. In Mode 5, reset
override will occur if the staging controller receives a
signal across the “STPT DEM” and “DEM SIG” terminals
of the terminal strip. (i.e., closing a tank aquastat switch
wired to these terminals). In this case, the control will
temporarily override outdoor reset and increase the
target temperature to
180°F
,
82°C
to provide suffi cient
heat to satisfy the DHW requirement.
Mode 6: Multiple BTC controls.
The control only
operates the pump and stage one.
REMOTE STAGING - An external staging control is
used to control and stage multiple boiler/water heaters.
Factory supplied terminals in the electrical box are used.
The operating control on the boiler/water heater is set
to its lowest setting when the water heater leaves the
factory. The preferred control setting for potable hot
water is
130°F
,
54°C
. The operating control should be
set to the lowest setting that will satisfy the consumer's
needs.
