Utica Boilers UB95M-200 Verweisanleitung
6
OUTDOOR RESET OPERATION
Outdoor reset adjusts the supply water temperature so the
heat output from the heating units matches the heat loss as
the outdoor temperature changes. the colder the outdoor
temperature, the warmer the water temperature, and vice
versa.
heat output from the heating units matches the heat loss as
the outdoor temperature changes. the colder the outdoor
temperature, the warmer the water temperature, and vice
versa.
the closer the heating unit output matches the heat loss,
the less the swing in the indoor temperature. you can adjust
control parameters to do this as shown below.
the less the swing in the indoor temperature. you can adjust
control parameters to do this as shown below.
OUTDOOR RESET TERMINOLOGy
Outdoor Design Temperature (ODT):
•
Outdoor design
temperature for the area, used to calculate heat loss.
(Use this value for T4 minimum.)
(Use this value for T4 minimum.)
Balance Point Temperature
•
: Outside temperature
at which building heat loss equals building heat gain
from solar and internal sources. at this temperature,
no space heating is required. (Use this value for T4
maximum.)
from solar and internal sources. at this temperature,
no space heating is required. (Use this value for T4
maximum.)
Automatic Temperature Boost:
•
Compensates for
side temperature.
t1 top (Parameter 4) is the outlet water temperature
the boiler tries to maintain whenever the outside tem-
the boiler tries to maintain whenever the outside tem-
IMPORTANT: installation must comply with local re-
quirements and with the national Fuel gas Code, anSi
Z223.1 for u.S. installations or CSa B149.1 or B149.2
for Canadian installations.
Z223.1 for u.S. installations or CSa B149.1 or B149.2
for Canadian installations.
required pick-up times and variations in heating load
requirements by automatically increasing set point tem-
requirements by automatically increasing set point tem-
perature when a call for heat exceeds a specified time
(Parameter 11).
(Parameter 11).
Parameters 4, 5, 6 & 7 (Outdoor reset)
Fixed Temperature Operation
•
: if boiler is operated
with constant outlet temperature (no outside tempera-
ture sensor installed), set Parameter 4 as described in
this manual.
ture sensor installed), set Parameter 4 as described in
this manual.
Outdoor Reset Operation:
•
Parameters 4 to 7 deter-
mine the reset curve, as shown in Figure #1.
t1 is the boiler outlet water temperature. t4 is the out-
•
III - PARAMETER ExPLANATIONS
CONTROL MODULE PARAMETERS AND OUTDOOR
RESET CURVE
Outdoor Reset Example A
180°F
182°F
210°F
200°F
200°F
T4 Maximum
(Parameter 7)
T Blocking
(Parameter 10)
T1 Foot
(Parameter 5)
(No higher that 180°F )
(Auto rest limit setting - not adjusted)
(Manual rest limit setting - not adjusted)
Boiler shuts OFF when
(T1 Set is less than T Blocking)
T4 Minimum
(Parameter 6)
T1 Top
(Parameter 4)
T1 Top
Cooler
W
armer
Setpoint T
emperature T1
Cooler
Warmer
Outside Temperature °F
PARAMETER DETAILS
PARAMETER
NUMBER
PARAMETER
NAME
FACTORy
SETTING
ADJUSTMENT
RANGE
4
T1 Top
180°F
68 - 182°F
5
T1 Foot
120°F
60 - 140°F
6
T4 Minimum
0°F
-4 - 50°F
7
T4 Maximum
60°F
60 - 78°F
10
T Blocking
60°F
32 - 140°F
(or “32” for Off)
Figure #1
This document must only be used by a qualified
heating installer or service technician. Read all
instructions, including the Installation Manu-
al (P/N# 240006103), the Control Manual and
Operating Instructions (P/N# 240006104), the
User’s Information Manual (P/N# 240006106),
and this Parameter Guide before attempting to
program the control, and be sure to perform all
instructions, including the Installation Manu-
al (P/N# 240006103), the Control Manual and
Operating Instructions (P/N# 240006104), the
User’s Information Manual (P/N# 240006106),
and this Parameter Guide before attempting to
program the control, and be sure to perform all
steps in the order specified. Failure to comply
could result in severe personal injury, death, or
substantial property damage.
substantial property damage.
WARNING
!
Revise boiler control parameters only if you
fully understand the purpose and result of the
changes and on the advice of Technical Sup-
port. Tampering without fully understanding
the control settings in this manual will void the
warranty and can result in unreliable operation,
with possible severe personal injury, death, or
substantial property damage.
fully understand the purpose and result of the
changes and on the advice of Technical Sup-
port. Tampering without fully understanding
the control settings in this manual will void the
warranty and can result in unreliable operation,
with possible severe personal injury, death, or
substantial property damage.
WARNING
!