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!
Revise boiler control parameters only if you
fully understand the purpose and result of the
changes and on the advice of ECR Technical
Support. Tampering without fully understand-
ing the control settings in this manual will void
the warranty and can result in unreliable op-
eration, with possible severe personal injury,
death, or substantial property damage.
!
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
steps in the order specified. Failure to comply
could result in severe personal injury, death, or
substantial property damage.
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.
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.
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.
OUTDOOR RESET TERMINOLOGy
•
Outdoor Design Temperature (ODT):
temperature for the area, used to calculate heat loss.
(Use this value for T4 minimum.)
•
Balance Point 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.)
•
Automatic Temperature Boost:
III - parameter Explinations
WARNING
WARNING
Outdoor design
: Outside temperature
Compensates for
required pick-up times and variations in heating load
requirements by automatically increasing set point tem-
perature when a call for heat exceeds a specified time
(Parameter 11).
Parameters 4, 5, 6 & 7 (Outdoor reset)
•
Fixed Temperature Operation
with constant outlet temperature (no outside tempera-
ture sensor installed), set Parameter 4 as described in
this manual.
•
Outdoor Reset Operation:
mine the reset curve, as shown in Figure #1.
•
t1 is the boiler outlet water temperature. t4 is the out-
CONTROL MODULE pARAMETERS AND OUTDOOR
Outdoor Reset Example A
210°F
200°F
(Manual rest limit setting - not adjusted)
182°F
(Auto rest limit setting - not adjusted)
180°F
T1 Top
(No higher that 180°F )
(Parameter 4)
T Blocking
(Parameter 10)
T1 Foot
(Parameter 5)
T4 Maximum
(Parameter 7)
Warmer
pARAMETER DETAILS
PARAMETER
PARAMETER
NUMBER
NAME
4
T1 Top
5
T1 Foot
6
T4 Minimum
7
T4 Maximum
10
T Blocking
side temperature.
t1 top (Parameter 4) is the outlet water temperature
the boiler tries to maintain whenever the outside tem-
6
: if boiler is operated
Parameters 4 to 7 deter-
Figure #1
RESET CURVE
Boiler shuts OFF when
(T1 Set is less than T Blocking)
T4 Minimum
(Parameter 6)
Outside Temperature °F
FACTORy
ADJUSTMENT
SETTING
180°F
68 - 182°F
120°F
60 - 140°F
0°F
60°F
60°F
32 - 140°F
(or "32" for Off)
T1 Top
Cooler
RANGE
-4 - 50°F
60 - 78°F
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