tekmar 363 Universal Reset Control Installation - Manual (Page 7)

7 of 40 Copyright © D 363 -
12/08
BOILER DESIGN (Boil DSGN) (
RESET RATIO & CHARACTERIZED HEATING CURVE
)
The Boil DSGN temperature is the supply water temperature required to heat the boiler zones when the outdoor air is as cold as the
Outdoor Design temperature.
BOILER MINIMUM (Boil MIN)
(
RESET RATIO & CHARACTERIZED HEATING CURVE )
The Boil MIN is the lowest water temperature that the control is allowed
to use as a boiler target (Boil TRG)
temperature. During mild conditions,
if the 363 calculates a Boil TRG temperature that is below the Boil MIN
setting, the Boil TRG temperature is adjusted to be at least the Boil MIN
setting. During this condition, if the boiler is operating, the
Minimum
pointer turns on in the LCD while the Boil TRG or the Boil SUP
temperature is viewed. If the installed boiler is designed for condensing
operation, set the Boil MIN adjustment to OFF.
BOILER MAXIMUM (Boil MAX)
(
RESET RATIO & CHARACTERIZED HEATING CURVE )
The Boil MAX is the highest water temperature that the control is allowed
to use as a Boil TRG temperature. If the control does target Boil MAX,
and the Boil SUP temperature is near the Boil MAX temperature, the
Maximum pointer turns on in the LCD while the Boil TRG or the Boil SUP
temperature is viewed. At no time does the control operate the boiler
above 248˚F (120˚C).
WARM WEATHER SHUT DOWN (WWSD) OCC & UNOCC
(
RESET RATIO & CHARACTERIZED HEATING CURVE )
When the outdoor air temperature rises above the WWSD setting, the 363 turns on the WWSD pointer in the display. When the control
is in Warm Weather Shut Down, the Boiler Demand pointer is displayed if there is a demand. However, the control does not operate
the heating system to satisfy this demand. The control does respond to either a DHW Demand or a Setpoint Demand and operates as
described in Section C.
BOILER SETBACK (Boil SETB) ( RESET RATIO )
The Boil SETB is the amount that the boiler supply water temperature is reduced when the 363 is placed into an UnOccupied mode,
using an internal or an external setback as described in Section A. This setting is only available if the Reset Ratio DIP switch is selected
and Setback / None DIP switch is set to Setback.
BOILER INDOOR (Boil INDR)
(
CHARACTERIZED HEATING CURVE )
The Boil INDR is the room temperature used in the original heat loss
calculations for the building. This setting establishes the beginning of the
Characterized Heating Curve for the boiler zones. This single setting
replaces the Boil STRT water temperature and OUT STRT
air tempera-
ture settings used by the Reset Ratio.
BOILER ROOM OCC & UNOCC (Boil ROOM)
(
CHARACTERIZED HEATING CURVE
)
The Boil ROOM is the desired room temperature for the boiler zones and
it provides a parallel shift of the
Characterized Heating Curve. The room
temperature desired by the occupants is often different from the de-
signed indoor temperature (Boil INDR). If the room temperature is not
correct, adjusting the Boil ROOM
setting increases or decreases the
amount of heat available to the building. If the Setback / None DIP switch
is set to Setback, a Boil ROOM setting must be made for both the
Occupied and UnOccupied modes.
BOILER TARGET TEMPERATURE (Boil TRG)
(
RESET RATIO & CHARACTERIZED HEATING CURVE )
The Boil TRG temperature is determined from either the Characterized
Heating Curve or the Reset Ratio settings and the outdoor air tempera-
ture. The control displays the temperature that it is currently trying to
maintain as the boiler supply temperature. If the control does not
presently have a requirement for heat, it displays “- - -” in the LCD.
Boil Max + 1/2 Boiler Differential
Boil Max - 1/2 Boiler Differential
Boil W
ate
r Te
mp
era
tur
e
Pointer On Pointer On
Boil MAX
70
(21)
90
(32)
110
(43)
130
(54)
150
(66)
170
(77)
190
(88)
Outdoor Air Temperature
Supply W
ater
T
emperature
210
(99)
-20
(-29)
0
(-18)
20
(-7)
40
(5)
60
(16)
80
(27)
Boil DSGN
Boil MAX
Boil MIN
WWSD Unocc
Boil IND
OUT DSGN
Boiler Characterized
Heating Curve
WWSD Occ
50
(10)
Boil ROOM Occ
Boil ROOM UnOcc
Pointer On
Boil MIN
Boil Wat
er Te
mpe
ratu
re
Boil Min + 1/2 Boiler Differential
Boil Min - 1/2 Boiler Differential