ECR International 95M-200 User manual

Parameter guide
95M-200
GAS-FIRED DIRECT VENT
MODULATING HOT WATER BOILER
P/N 240006105, Rev. A [04/08]
Revise boiler control parameters only if you fully
understand the purpose and result of the chang-
es and on the advice of ECR Technical Support.
Tampering without understanding the control
settings in this manual will void the warranty
and can result in unreliable operation, with pos-
sible severe personal injury, death, or substan-
tial property damage.
WARNING
!

heating installer or service technician. Read all
instructions, including the Installation Manual
(P/N# 240006103), the Control Manual and Oper-
ating 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
-
sult in severe personal injury, death, or substan-
tial property damage.
WARNING
!
IMPORTANT: Installation must comply
with local requirements and with the Na-

installations or CSA B149.1 or B149.2 for
Canadian installations.
DO NOT DESTROY THESE INSTRUCTIONS!!
Please read carefully and keep in a safe place
for future reference.

3
IMPORTANT: Read the following instructions
completely before installing!!
Keep this manual near boiler
and retain for future reference.
PARAMETER GUIDE
Printed in USA • Made In USA



The following dened symbols are used throughout
this manual to notify the reader of potential hazards of
varying risk levels.
Indicates an imminently hazardous situation
which, if not avoided, will result in death, serious
injury or substantial property damage.
DANGER
!
Indicates a potentially hazardous situation which,
if not avoided, could result in death, serious injury
or substantial property damage.
WARNING
!
Indicates a potentially hazardous situation which, if
not avoided, could result in minor or moderate injury
or property damage.
CAUTION
!
I - Safety Symbols and Warnings.......................3
II - Overview of Control Parameters...................4
III - Parameter Explinations................................6
IV- How To Set Parameters...............................11
V - Parameter Reference Table........................ 12
VI - Parameter Change Record........................ 19

4
II - Overview of Control Parameters

This manual includes detailed explanations of the adjustable
parameters. See Section III, “Parameter Explanations,” for
more information.
Revise boiler control parameters only if you fully
understand the purpose and result of the changes
and the advice of ECR Technical Support. Tamper-
ing without 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
!

The “Default Parameter Settings” table on the next page 1.
lists the factory default settings for this boiler at stan-
dard altitudes (up to 2000 feet). When in doubt, always
restore parameters to the default settings listed.

Factory default settings will work for most applications. 1.
There are situations, however, for which changes are
desirable or even mandatory (ex: multiple boiler applica-
tions using the Honeywell AM (HAM) module).
Default boiler settings are satisfactory for most high- 2.
mass systems (radiant slab, cast iron radiators, most
nned-tube radiation).

Outdoor Reset Applications: Outdoor reset operation
can sometimes be improved by adjusting parameters 4,
5, 6, and 7. Parameters 9, 10, and 11 might also be modi-
ed. See “Parameter Explanations” for more information on
outdoor reset.
High Altitude Installations: To ensure proper operation
parameter 17 must be set to 3,200 RPM in all installations
at or above elevations of 2,000 feet. Failure to do so could
result in potential for severe personal injury, death or sub-
stantial property damage.
Refer to Section IV of this manual for instructions on how to
change parameters.
 : Systems using fan coil units respond
to heat input rapidly, and may require larger differential
settings (parameters 22 - 25) for best performance. (See
“Parameter Explanations” for more information on control
differential and how to adjust.)
High-mass Systems: High-mass systems, such as in-slab
radiant and cast iron radiator systems, respond slowly to
heat input. The factory default settings will work well for
most of these applications.


equipment performance problems, resulting in
potential severe personal injury, death, or sub-
stantial property damage.
WARNING
!
Parameter 2: Do not set for continuous DHW pump.•
Parameters 13 and 15: Do not set higher than values•
in the “Default Parameter Settings” Table on the next
page.
Parameters 17 and 19: Do not set lower than•
values in the “Default Parameter Settings” Table on the
next page.
Parameters 24, 25, 26, and 27: Do not change from•
default settings.
Parameter 32: Do not change from value of 0.•
Parameter 33: Leave setting at 30° F for storage tank•
DW applications.
Parameter 34 (First Digit): Do not change from value of•
0.
Parameter 34 (Second Digit): Set only at 0 (2nd CH•
circuit off) unless using a Honeywell AM module. With
HAM, set second digit to 4 (0 - 10 V analog on HAM
capacity).
Parameter 35 (Both Digits): Do not change either digit•
from default setting.
Parameters 37, 39, 40, and 41: Do not change. For•
future use only.
Parameter 42 (First Digit): Do not change from default•
value.

5
DO NOT CHANGE ANY PARAMETER UNLESS THEAPPLICATION REQUIRES SPECIAL SETTINGS.
PARAMETER/DESCRIPTION GASCOM 
1 T3 Set DHW 150°F 150
2DHW System On 01
3 CH System On 01
4T1 Top CH-Mode 180°F 180
5T1 Foot CH-Mode 120°F 120
6T4 Minimum 0°F 00
7T4 Maximum 60°F 60
8T4 Frost Protection -20°F -20
9T4 Correction 0°F 00
10 T Blocking 60°F 60
11 Booster Time 30 Minutes 30
12 T Parallel Shift 10°F 10
13 Maximum Fan Speed CH 6000 rpm 60
15 Maximum Fan Speed DHW 6000 rpm 60
17 Minimum Fan Speed 2250 rpm 22
19 Ignition Fan Speed 3500 rpm 35
20 CH Postpump Time 0 Minutes 00
21 DHW Postpump Time 30.6 Seconds 03
22 CH Modulation Hysteresis On 4°F 04
23 CH Modulation Hysteresis Off 4°F 04
24 DHW Modulation Hysteresis On 4°F 04
25 DHW Modulation Hysteresis Off 4°F 04
26 DHW Detection Hysteresis On 4°F 04
27 DHW Detection Hysteresis Off 4°F 04
28 CH Blocking Time 10.2 Seconds 01
29 DHW Blocking Time 10.2 Seconds 01
30 DHW -> CH Blocking Time 30.6 Seconds 03
31 Modulate Back Difference T1 - T2 50°F 50
32 RMCI Address -01 -01
33 T Plus: SetvalueAdditional For DHW 30°F 30
34 2nd CH-Circuit (1st Digit) 2nd CH-Circuit Off 00
34 CH Type (2nd Digit) Room Thermostat 00
35 DHW 3-Way Valve/Pump (1st Digit) Hot Water Pump 13
35 DHW Type (2nd Digit) Storage Tank w/out Tank
Sensor (NTC3) 13
36 Manual Fan Speed Negative 1% -01
37 PWM-Pump Level (1st Digit) 3 31
37 PWM-Pump Level (2nd Digit) 1 31
38 T Set Hold Boiler Warm 40°F 40
39 T Top For 2nd CH Circuit 70°F 70
40 T Foot for 2nd CH Circuit 50°F 50
41 T Hysteresis For 2nd CH Circuit 20°F 20
42 Pump Settings For CH & DHW 00 21
42 Minimum Off Cycle Not Active 21



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.
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 Design Temperature (ODT): Outdoor Design
Temperature for the area, used to calculate heat loss.
(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.)
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-
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.
required pick-up times and variations in heating load
requirements by automatically increasing set point tem-
perature when a call for heat exceeds a specied time
(Parameter 11).
Parameters 4, 5, 6 & 7 (Outdoor reset)
 :If boiler is operated
with constant outlet temperature (no outside tempera-
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-•



Outdoor Reset Example A
180°F
182°F
210°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 Warmer
Setpoint Temperature T1
CoolerWarmer Outside Temperature °F

PARAMETER
NUMBER PARAMETER NAME  SETTING ADJUSTMENT RANGE
4T1 Top 180°F 68 - 182°F
5T1 Foot 120°F 60 - 140°F
6T4 Minimum 0°F -4 - 50°F
7T4 Maximum 60°F 60 - 78°F
10 T Blocking 60°F 32 - 140°F
(or “32” for Off)
Figure #1

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

could result in severe personal injury, death, or
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 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.
WARNING
!

7
perature is less than T4 Minimum (Parameter 6).
T1 Foot (Parameter 5) is the outlet water temperature
the boiler tries to maintain whenever the outside tem-
perature is higher than T4 Maximum (Parameter 7).
When outside temperature is between T4 Maximum
and T4 Minimum, the control calculates a value for T1
Setpoint (T1 Set) between T1 Foot and T4 Top.
The boiler may not operate all the way down to T1 foot.•
Parameter 10 (T Blocking) sets a minimum operating
outlet water temperature. If the calculated setpoint, T1
set, is less than T blocking, the boiler shuts off.
Set Parameters 4 to 7 as needed for the desired reset•
curve. Make sure to set parameters 4 and 6 so the
outlet water temperature is at design water temperature
when outside temperature drops to the ODT (outdoor
design temperature).
Parameter 9 (T4 correction)
Location of the outdoor sensor may sometimes cause•
the sensor to incorrectly detect outside temperature.
You can set Parameter 9 to correct for this difference•
(up to 9° F more or less) if you believe boiler response
needs to be improved. Set a negative number to reduce
the outdoor temperature reading, a positive number to
increase the reading.
Parameter 10 (T blocking)
Use this parameter to set a minimum operating boiler•
outlet water set point temperature.
When calculated set point temperature, T set, is at or•
below T blocking the boiler shuts down (after operating
a post pump cycle).
To deactivate this parameter, set the value to 32.•
Suggested outdoor reset settings
T1 Top: Set to the required supply water temperature•
when outdoor temperature is at or below ODT .
T1 Foot: Set so the drop in supply water temperature•
results in the best match of heating unit output to heat
loss as the outdoor temperature rises.
T4 Maximum: Set to the balance point temperature for•
the building (typically 65° F or lower).
T4 Minimum: Set to ODT.•

Setpoint Temperature T1, °F
Outdoor Reset Example A
182
210
50
70 60 50 40 30 20 10 0 -10 -20
70
90
110
130
150
170
190
200
T4 Maximum Set at 60°F
T1 Top Set at 180°F
T4 Minimum Set at 0°F
T Blocking Set at 100°F
T1 Foot Set at 60°F
M/R Limit
A/R Limit
Boiler OFF
(T1 Set less than T Blocking)
Outside Temperature, °F
Setpoint Temperature T1, °F
Outside Temperature, °F
Outdoor Reset Example B
195
210
50
70 60 50 40 30 20 10 0 -10 -20
70
90
110
130
150
170
190
200
T4 Maximum Set at 60°F
T Top Set at 190°F
T4 Minimum Set at -2°F
T Blocking Set at 40°F
T1 Foot Set at 60°F
M/R Limit
A/R Limit

Figure #2
AUTOMATIC TEMPERATURE BOOST
If the target temperature happens to be too low for the•
heating units to supply sufcient heat within fteen
minutes (default setting), the control “boosts” the target
temperature until the supply water meets the system’s
needs.
Even if the reset parameters are optimized for the ap-•
plication, use of setback thermostats or the need for oc-
casional cold start operation will require faster recovery
than provided by the normal calculated supply water
temperature because the curve assumes steady-state
operation.
Boost will not call for supply water temperature setpoint
•

8
greater than the value of Parameter 4 (T1 Top). There
is no concern that temperature boost would supply
water too hot for low-temperature systems, such as
slab-type radiant heating. On hybrid systems, with
nned tube radiation and radiant slab, provide additional
low temperature protection for the radiant portion of the
system, because Parameter 4 (T1 Top) is likely to be
set higher than on a radiant-only system.
IMPORTANT: Many slab-type radiant systems
won’t require boost. This function can be dis-
abled with a parameter 11 setting of “0.”
Boost operation
In outdoor reset operation (outdoor sensor connected), 1.
the boiler control automatically increases the target out-
let water temperature if a call for heat exceeds a time
equal to Parameter 11 (factory default of 30 minutes).
At each interval of Parameter 11 of a continuous call for 2.
heat, the control module increases the target tempera-
ture by 18° F. See  .
The control module will continue increasing target 3.
temperature until it reaches the value set in Parameter
4 (T1 Top).
When the call for heat ends while target temperature is 4.
“boosted,” the target temperature drops about 2° F for

PARAMETER 11 (Automatic Supply Temperature Booster Operation)
Temperature Boost Operation (Typical):In this example, the boiler is operating in outdoor reset mode with a calculated setpoint tem-
perature of 130°F. The call for heat has lasted more than 10 minutes (value of Parameter 11) and supply temperature boost has occured.
Figure #3
each minute the thermostat is open.
Range: 1-30 minutes. 5.
Factory Default: 30 minutes. 6.
Deactivate automatic temperature boost by setting to 7.
“0.”

        -
plied by the factory (See the “Default Param-
eters Table” in Section II). Setting limits above
or below these factory defaults would increase
       -
ceptable limit, resulting in potential for severe
personal injury, death, or substantial property
damage.
WARNING
!
Parameters 13 and 15 can be set to limit the maximum•
boiler ring rate. Boiler ring rate is proportional to the
fan speed, so reducing the maximum fan speed reduc-
es maximum input.
Reducing maximum fan speed will be helpful for sys-
•
tems on which the boiler is oversized for either space
heating or DHW, or both.
Maximum fan speed can be set separately for space•

9

% Rate BTUH RPM Boiler Display
40 80,000 2250 22
50 100,000 3250 32
60 120,000 3800 38
70 140,000 4400 44
80 160,000 4750 47
90 180,000 5250 52
100 200,000 6000 60
NOTE: Results may vary depending on altitude of in-
stallation, gas caloric value, and vent length.
heating and DHW using Parameters 13 and 15.

Acceptable Range for Natural Gas and LP: 2250 to•
6000 rpm (22 to 60 on boiler display).
NOTE: Boiler display shows fan speed in hundreds of rpm. A
value of 48 would mean a speed of 100 x 48, or 4800 rpm.
Factory Defaults: See the “Default Parameters Table” in•
Section II of this manual.
If the boiler is oversized for space heating, you can•
reduce the maximum fan speed during space heating
operation (Parameter 13) to limit the maximum boiler
input.

Acceptable Range for Natural Gas and LP: 2250 to•
6000 rpm (22 to 60 on boiler display).
NOTE: Boiler display shows fan speed in hundreds of rpm. A
value of 48 would mean a speed of 100 x 48, or 4800 rpm.
Factory Defaults: See the “Default Parameters Table” in•
Section II of this manual.
If the boiler is oversized for domestic water heating, you•
can reduce the maximum fan speed during DHW opera-
tion (Parameter 15) to limit the maximum boiler input.

The fan speed must not be set below the value
as supplied from the factory (see the “Default
Parameters Table” in Section II). This would
      
limit, resulting in potential for severe personal
injury, death, or substantial property damage.
WARNING
!
PARAMETER 17 sets the minimum fan speed. Boiler ring
rate is proportional to fan speed, so increasing the minimum
fan speed increases the minimum ring rate (low re).
Parameter 17 sets the minimum fan speed for both DHW
and space heating modes. Set parameter 17 to 3,200 for
altitudes above 2,000 ft.
Acceptable Range for Natural Gas and LP: 2250 rpm•
(22 on boiler display).
NOTE: Boiler display shows fan speed in hundreds of rpm. A
value of 48 would mean a speed of 100 x 48, or 4800 rpm.
Factory Defaults: See the “Default Parameters Table” in•
Section II of this manual.



as supplied from the factory (see the “Default
Parameters Table” in Section II). This would
      
limit, resulting in potential for severe personal
injury, death, or substantial property damage.
WARNING
!
Parameter 19 sets the fan speed during ignition. Boiler•
ring rate is proportional to fan speed, so increasing the
minimum fan speed increases the minimum ring rate
(low re).
IMPORTANT: Parameter 19 should only be changed where
required for high altitude applications.
Acceptable Range for Natural Gas and LP: 3000 to•
3600 rpm (30 to 36 on boiler display).
NOTE: Boiler display shows fan speed in hundreds of rpm. A
value of 48 would mean a speed of 100 x 48, or 4800 rpm.
Factory Defaults: See the “Default Parameters Table” in•
Section II of this manual.

Do not change the differentials (hysteresis) for
domestic hot water operation (Parameters 24,
25, 26, and 27). Always use only the factory de-
fault settings for these parameters.
WARNING
!

10
Space heating differentials (parameters 22 and 23)
The term “differential” is also referred to as “hysteresis.”•
Parameter 22 is the “On” differential. The water tem-•
perature must be at least Parameter 22 less than the
calculated setpoint temperature for the boiler to turn on.
Parameter 23 is the “Off” differential. When the boiler is
•
ring, the water temperature must rise at least Param-
eter 23 above the calculated setpoint temperature for
the boiler to turn off.
See Figure #4 for an explanation of the “On” and “Off”
•
differentials of the boiler control. Note that the differ-
entials are greater when a heat call starts or stops, as
shown. The differentials decrease with time until they
equal Parameters 22 and 23.

The factory default setting for Parameter 23 is 4° F.•
This works well for most applications.
For low mass systems (fan coil), performance can be•
improved by increasing Parameter 23. This compen-
sates for the quicker system temperature response of
low-mass systems.
When setting Parameter 23, make sure that Parameter
•
23 plus Parameter 4 is not over 193° F to avoid possible
nuisance lockouts.
 (Hysteresis))

Figure #4

11


Press and hold the “STEP” button. 1.
While holding the “STEP” button down, press and hold 2.
the “MODE” button.
Hold both buttons down together for several seconds 3.
until [CODE] appears on the display.
Release “STEP” and “MODE” buttons. [Code] will stay 4.
lit on on the display.
NOTE: If [CODE] is not displayed after several seconds,
release “STEP” and “MODE” buttons and press “MODE” several
times to return display to [STBY]. Then repeat step 2 again.
Press the “STEP” button once. Display will show “C” 5.
and a random number.
Adjust the number displayed to [C-05] by using the “+” 6.
and “-” buttons.
Press the “STORE” button. 7.
IMPORTANT: The boiler control will automati-

activity.
Press the “MODE” button several times until [PARA] is 8.
displayed.
Using the six buttons on the front of the boiler (below) and the proper code, the boiler can be both monitored and modied
using the digital display.
Perform the following steps with the boiler powered on and in standby  mode:
Press the “STEP” button several times until [P-XX] is 9.
displayed. The XX represents the parameter that will be
changed. The parameter’s value will then be displayed.
Note: for parameter 1-4 display will read “1.”, then the param-
eter setting.
Use the “+” or “-” buttons to set the desired value. 10.
Press the “STORE” button. Steps 9-11 can now be 11.
repeated for additional parameter changes or continue
to step 12 to exit.
IMPORTANT: Store MUST be pressed after
 parameter change. The change is ac-
cepted if the display blinks twice.
Press the “RESET” button to exit. 12.
IMPORTANT: After making changes to pa-
rameters, record the changes made on the last
page of this manual and leave a copy with the
boiler for future reference.

12
Para. Name
Range Boiler Display
Description
Gascom
Software Boiler Display Display Position
1st 2nd 3rd 4th
1T3 Set
Storage DHW:
68° to 158°F
Instantaneous
DHW:
104° to 150°
68 to 158
104 to 150 1 Setting
• T3 is the DHW temperature by an immer-
sion sensor.
• DO NOT CHANGE this parameter from
the factory setting. ( Boiler outlet water
temperature setpoint in DHW mode is de-
termined by adding Parameter 1 to Param-
eter 33.)
• If applied for instantaneous DHW opera-
tion (not recommended), set Parameter 35
for the correct conguration.
2DHW System
DHW OFF 0
2 Blank Blank Value
• Parameter 2 determines whether DHW
heating is activated. The boiler will not op-
erate in DHW mode if this parameter is set
to “0” or “3”.
DHW ON 1
DHW OFF +
pump
constant 2•  It is not recommended to
set this parameter to either “2” or “3” (con-
tinuous DHW pump). This could result in
a hazardous condition, because it causes
constant circulation between the boiler and
the DHW heater.
DHW ON +
pump
constant 3
3 CH System
CH OFF 0
3 Blank Blank Value
• Parameter 3 determines whether the boil-
er will operate in central heating mode.
CH ON 1
CH OFF +
boiler pump
constant 2• Select “1” to cycle the boiler circulator on
central heating calls.
CH ON +
boiler pump
constant 3• Select “2” or “3” to maintain constant boil-
er circulation operation.
4T1 Top 120° to 194°F 68 TO 182 4 Setting
• Constant Boiler Temperature operation
(outside sensor not connected): T1 Top is
the target outlet water temperature at all
times.
• Outside reset (outside sensor connected):
T1 Top is the maximum water temperature
based on outdoor air temperature.
5T1 Foot 60° to 140°F 60 to 140
Initial reading: • T1 Foot applies only in outdoor reset op-
eration.
P . 0 5
After 2 to 3 seconds: • T1 Foot is the minimum target tempera-
ture for all outside temperatures.
Blank Setting
6T4 Minimum -4° to 50° -4 to 50
Initial reading: • T4 Minimum applies only in outdoor reset
operation.
P . 0 6
After 2 to 3 seconds: • T4 Minimum is the outside temperature at
which the target outlet water temperature
is at maximum.
Blank Blank Setting
7T4 Maximum 60° to 78°F 60 to 78
Initial reading: • T4 Maximum applies only in outdoor re-
set operation
P . 0 7
After 2 to 3 seconds: • T4 Maximum is the outside temperature
at which the target outlet water tempera-
ture is at minimum.
Blank Blank Setting


13
Para. Name
Range Boiler Display
Description
Gascom
Software Boiler Display Display Position
1st 2nd 3rd 4th
8T4 Frost
Protection -22° to 50°F -22 to 50
Initial reading: When outside temperature drops to this
number, the boiler circulator will run con-
stantly.
P . 0 8
After 2 to 3 seconds:
Blank Setting
9T4 Correction -8° to 10°F -8 to10
Initial reading: Use this parameter to modify the outside
temperature reading if needed to correct
for outside sensor location. Use only if sen-
sor is providing a false reading.
P . 0 9
After 2 to 3 seconds:
Blank Blank Setting
10 T Blocking 32° (off)
34° - 140°F 32 (off) 34 - 140
Initial reading: When the target outlet water temperature
is less than this setting, the boiler shuts
off.
P . 1 0
After 2 to 3 seconds:
Blank Setting
11 Booster Time
0
(no booster)
1 to 30
(minutes)
0 to 30
Initial reading: • If a call for heat causes the boiler to re-
main at high re for a time equal to Param-
eter 11, the control module increases out-
let water temperature setpoint by 18°F. For
each additional Parameter 11 time the heat
call continues, the set point is increased
another 18°F (never exceeding Parameter
4 + Parameter 23 (hysteresis off))
P . 1 1
After 2 to 3 seconds:
Blank Blank Setting • To deactivate booster operation, set this
parameter to 0.
12 T Parallel
Shift 0 to 144°F 0 to 144
Initial reading: • The value of Parameter 12 reduces the
calculated setpoint temperature by the
amount set when the call for heat is from
outdoor temperature.
P . 1 2
After 2 to 3 seconds: • We recommend not changing this param-
eter from the factory default of 0 (no paral-
lel shift).
Blank Setting
13 Maximum fan
speed CH 2250 to 6000 22 to 60 (100’s of rpm)
Initial reading: • Use this parameter to change the maxi- mum boiler input for central heating (CH).
Never above default value .
P . 1 3
• When in central heating mode, the boiler
fan speed will not exceed this setting. In-
creasing fan speed increases boiler input;
decreasing fan speed decreases boiler in-
put.
After 2 to 3 seconds: • Never set below low re setting or above
maximum value shown at left.
Blank Setting
15 Maximum fan
speed DHW 2250 to 6000 22 to 60 (100’s of rpm)
Initial reading: • Use this parameter to change the maxi- mum boiler input for domestic water heat-
ing (DHW)-NEVER above default value.
P . 1 5 • Boiler fan speed will not exceed this set-
tingin DHWmode. Increasingfan speedin-
creases boiler input; decreasing fan speed
increases fan speed decreases input.
After 2 to 3 seconds:
Blank Blank Setting •NEVER set below low re setting or above
the maximum value shown at left.
Continued

14
Para. Name
Range Boiler Display
Description
Gascom
Software Boiler Display Display Position
1st 2nd 3rd 4th
17 Minimum fan
speed DHW 2250 to 6000 22 to 60 (100’s of rpm)
Initial reading: • Use this parameter to increase the mini-
mum input of the boiler. Increasing fan
speed increases boiler input; decreasing
fan speed decreases input.
P . 1 7
After 2 to 3 seconds:
Blank Blank Setting • NEVER set outside values shown at left.
19 Ignition fan
speed 3000 to 3600 30 to 36 (100’s of rpm)
Initial reading: • Use this parameter to increase the mini-
mum input of the boiler during ignition.
• Increasing fan speed increases boiler in-
put; decreasing fan speed decreases input.
• SET ONLY at recommended (default) values.
P . 1 9
After 2 to 3 seconds:
Blank Blank Setting
20 Postpump
time CH
0
(10 seconds)
1 to 99
(minutes)
0 to 99
Initial reading: Parameter 20 is the length of time the
boiler circulator continues to operate after
completing a central heating cycle.
P . 2 0
After 2 to 3 seconds:
Blank Blank Setting
21 Postpump
time DHW 0 to 306 seconds
0 to 30
(times 10.2
seconds)
Initial reading: Parameter 21 is the length of time the
boiler circulator continues to operate after
completing a DHW cycle.
P . 2 1
After 2 to 3 seconds:
Blank Blank Setting
22 CH Modula-
tion differen-
tial ON 0 to 36°F 0 to 36
Initial reading: • Differential may also be referred to as
“hysteresis”
P . 2 2
After 2 to 3 seconds: •This is the temperature the boiler water
must drop below setpoint temperature to
turn the boiler on.
Blank Blank Setting
23 CH Modula-
tion differen-
tial OFF 0 to 18°F 0 to 18
Initial reading: • Differential may also be referred to as
“hysteresis”
P . 2 3 • This is the temperature the boiler water must not must rise above setpoint temper-
ature to turn the boiler off.
After 2 to 3 seconds: • As outlet temperature increases, the con-
trol module reduces boiler input. If tem-
perature continues to rise with boiler with
minimum input, the boiler will shut down
when the temperature reaches setpoint
temperature plus Parameter 23.
Blank Blank Setting
24 DHW Modu-
lation differ-
ential ON -2° to 54°F -2 to 54
Initial reading: • Differential may also be referred to as
“hysteresis”
P . 2 4 • This is the temperature boiler water must
drop below setpoint temperature to turn
the boiler on. Boiler outlet water setpoint
temperature is 180°F during DHW mode.)
After 2 to 3 seconds:
Blank Blank Setting
25 DHW Modu-
lation differ-
ential OFF -6° to 54°F -6 to 54
Initial reading: • Differential may also be referred to as
“hysteresis”
P . 2 5 • This is the temperature boiler water must
rise above setpoint temperature to turn
the boiler off. (As outlet temp. increases,
the control module reduces boiler input. If
temperature continues to rise with boiler
at minimum input, the boiler will shut down
when the temperature reaches setpoint
temperature plus Parameter 23.)
After 2 to 3 seconds:
Blank Blank Setting
Continued

15
Para. Name
Range Boiler Display
Description
Gascom
Software Boiler Display Display Position
1st 2nd 3rd 4th
26 DHW detec-
tion differen-
tial ON -2° to 54°F -2 to 54
Initial reading: • Differential may also be referred to as
“hysteresis”
P . 2 6 • This parameter has no effect unless a
DHW sensor is used - not recommended
(use an aquastat instead).
After 2 to 3 seconds:
Blank Blank Setting • This is the temperature the DHW water must drop below DHW setpoint tempera-
ture to turn the boiler on.
27 DHW detec-
tion differen-
tial OFF -2° to 54°F -2 to 54
Initial reading: • Differential may also be referred to as
“hysteresis”
P . 2 7 • This parameter has no effect unless a
DHW sensor is used - not recommended
(use an aquastat instead).
After 2 to 3 seconds:
Blank Blank Setting • This is the temperature the DHW water must rise above DHW setpoint tempera-
ture to turn the boiler off.
28 Blocking time
CH 0 to 306 sec- onds
0 to 30
(times 10.2
seconds)
Initial reading: Parameter 28 is the minimum time be-
tween consecutive central heating cycles.
After a call for heat is satised, the boiler
will remain off for at least the blocking time
before starting another cycle.
P . 2 8
After 2 to 3 seconds:
Blank Blank Setting
29 Blocking time
DHW 0 to 306 sec- onds
0 to 30
(times 10.2
seconds)
Initial reading: Parameter29 istheminimum timebetween
consecutive DHW heating cycles. After the
DHW call for heat is satised the boiler will
remain off for at least the blocking time be-
fore starting another DHW cycle.
P . 2 9
After 2 to 3 seconds:
Blank Blank Setting
30 Blocking time
DHW to CH 1 to 306 sec-
onds
0 to 30
(times 10.2
seconds)
Initial reading: Parameter 30 is the minimum wait time af-
ter a DHW call before the boiler will start
on a call for central heating. If a DHW call
is satised and a central heating call starts,
the boiler will shut down and wait the block-
ing time before starting.
P . 3 0
After 2 to 3 seconds:
Blank Blank Setting
31
T1 - T2 dif-
ference for
modulating
back
10° to 72° 10 to 72
Initial reading: • If the difference between boiler outlet wa-
ter temperature (T1) and return tempera-
ture (T2) is larger than parameter 31, the
boiler is forced to low re.
P . 3 1
After 2 to 3 seconds:
Blank Blank Setting • DO NOT set higher than factory defaults.
32 RMCI
address
-1
(RMCI off)
0 to 7 B87
(address)
-1
(RMCI off)
0 to 7
(address)
Initial reading: DO NOT CHANGE this parameter. It is
intended for use with an RMCI 1400 inter-
face device, currently not available.
P . 3 2
After 2 to 3 seconds:
Blank Blank Setting
33
T Plus
(setvalue
addition for
DHW)
0° to 54°F 0 to 54
Initial reading: • Parameter 33 sets the target boiler out-
let water temperature in DHW mode. Add
parameter 33 to parameter 1 to determine
the target temperature
P . 3 3
After 2 to 3 seconds:
Blank Setting
• Factory default is 150°F for parameter
1 and 30° for parameter 33, for a total of
180°F as the DHW boiler outlet water tem-
perature.
Continued

16
Para. Name
Range Boiler Display
Description
Gascom
Software Boiler Display Display Position
1st 2nd 3rd 4th
34
(1st
digit)
2nd CH
circuit CH
type
0 to 8
(see right) 0 to 8
Initial reading: First digit (2nd circuit):
• DO NOT CHANGE parameter 34 rst dig-
it. Second central heating circuit operation
is not currently supported .
• 0 (2nd CH circuit off ) - No second CH
circuit operation (LEAVE AS IS)
• 1 (2nd CH circuit as slave)
• 2 (2nd CH as master)
• 3 (2nd CH circuit as slave, T set also by
potmeter) - 2nd heating circuit as slave,
with setpoint temperature with setpoint
temperature determined by potentiometer.
• 4 (2nd CH circuit as master, T set also by
potmeter) - 2nd heating circuit as master,
with setpoint temperature determined by
potentiometer.
• 5 (2nd CH circuit as slave, active during
HW) 2nd heating circuit as slave, during
DHW.
• 6 (2nd CH circuit as slave, active during
HW) - 2nd heating circuit as master, during
DHW .
• 7 (2nd Ch circuit as slave, T set also by
potmeter, active during HW) - 2nd heating
circuit as slave, during DHW, with setpoint
temperature determined by potentiometer.
• 8 (2nd CH circuit as master, T set also by
potmeter, active during HW) - 2nd heating
circuit as slave, during DHW, with set point
temperature dtermined by potentiometer.
P . 3 4
34
(2nd
digit) CH Type 0 to 6
(see right) 0 to 6
After 2 to 3 seconds: Second Digit (CH Type):
• 0 (room thermostat) - Central heating
opertion controlled by room thermostat
• 1 (outside temperature) - DO NOT SE-
LECT - Central heating operation con-
trolled by outside sensor (not currently
supported)
• 2 (0 - 10 V analog on MCBA: Capacity)
- DO NOT SELECT - central heating boiler
input controlled with 0 - 10 V input to con-
trol module (not currently supported)
• 3 ( 0 - 10 v analog on MCBA: temperature)
- DO NOT SELECT- Central heating boiler
outlet temperature controlled with 0 - 10
vdc input to control module (Not currently
supported)
• 4 (0 to 10 V analog on HAM: capacity) -
Select this value when using HAM module
to interface with multiple boiler controller.
See HAM instructions.
• 5 ( 0 - 10 V analog on HAM temperature)
- DO NOT SELECT- Central heating boiler
outlet temperature controlled with 0 - 10
vdc input HAM module, but controls tem-
perature setpoint. See HAM instructions.
• 6 (+/- control) - DO NOT SELECT - Cen-
tralheatingmodecontrolledwith+/-inputto
control module (not currently supported)
Blank Blank Digit
1Digit 2
Continued

17
Para. Name
Range Boiler Display
Description
Gascom
Software Boiler Display Display Position
1st 2nd 3rd 4th
35
(1st
digit) 3-Way Valve 0 to 2
(see right) 0 to 2
Initial reading: First digit (3-way valve):
• Control module readout: Initial reading -
P.35 (indicates Parameter 35) after 2 to 3
second, change the parameter setting:
Position 1,2 = blank
Position 3 = Parameter 35 rst digit (3 way
valve or pump)
Position 4 = Parameter 35 second digit
(DHW type)
• DO NOT CHANGE Parameter 35 rst
digit . 3 way valve operation is not currently
supported.
• 0 ( 3 way valve normally open) - Switch
to DHW from CH with normally open 3 way
valve
• 1 (hot water pump) - Use DHW circulator
in DHW mode
• 2 (3-way valve normally closed) - Switch
to DHW from CH with normally closed 3
way valve
P . 2 9
35
(2nd
digit) CH type 0 to 9 (see
right) 0 to 9
After 2 to 3 seconds:
Second digit (CH type):
• 0 (instant water heater with NTC3) -
DO NOT SELECT - instantaneous water
heater with sensor ( not currently sup-
ported)
• 1 (instant water heater without NTC3) -
DO NOT SELECT - Instantaneous water
heater without sensor (not currently sup-
ported)
• 2 (storage tank with NTC3) -
DO NOT SELECT- Storage tank with sen-
sor (not currently supported)
• 3 (storage tank without NTC3) -
DO NOT SELECT - Storage tank with
aquastat
• 4 (instant water heater with NTC3 + anti-
condensing) -
DO NOT SELECT - Instantaneous water
heater with sensor; anticondensate mode
(not currently supported)
• 5 (instantaneous water heater
without NTC3 + anti condensing) -
DO NOT SELECT - Instantaneous water
heater without sensor; anticondensate
mode (not currently supported)
• 6 (storage tank with NTC3 + anticon-
densing - DO NOT SELECT - Storage tank
with sensor; anticondensate mode (not
currently supported)
• 7 (storage tank without NTC3 + anticon-
densing) - DO NOT SELECT - Storage
tank with aquastat; anticondensate mode
(not currently supported)
• 8 (plate heater exchanger) - DO NOT SE-
LECT - Plate heater exchanger (not cur-
rently supported)
• 9 (external heat request) -
DO NOT SELECT - External heat request,
from RMCI (not currently supported)
Blank Blank Digit
1Digit 2
Continued

18
Para. Name
Range Boiler Display
Description
Gascom
Software Boiler Display Display Position
1st 2nd 3rd 4th
36 Manual fans-
peed
-1 (auto op-
eration)
0 to 100 (%)
-1 (auto)
0 to 100 (%)
Initial reading: Use this parameter, if desired, to manually
set the boiler at a xed input. The manual
operation will only continue for 15 minutes.
The control module then returns to auto-
matic operation.
P . 3 6
After 2 to 3 seconds:
Blank Blank Setting
37
(1st
digit)
37
(2nd
digit)
PWM level
CH-pump 1 to 4 (pump speed) 1 to 4
Initial reading:
This function is not currently supported.
P . 3 7
After 2 to 3 seconds:
Blank Blank Digit
1Digit 2
38 T Hold
32
(feature off)
32 to 176° F
32
(feature off)
32 to 176
Initial reading: Parameter 38 sets minimum standby tem-
perature for boiler. If boiler outlet or return
water temperature is sensed at less than T
Hold, the boiler res (without pump operat-
ing to bring temperature up to T Hold).
P . 3 7
After 2 to 3 seconds:
Blank Blank Setting
39 T6 Top
2nd CH
circuit 50 to 176° F 50 to 176
Initial reading: • This function is not currently supported.
• Sets max. target boiler temperature dur-
ing call for heat from 2nd CH circuit (same
function as T1 Top for rst CH circuit).
P . 3 9
After 2 to 3 seconds:
Blank Blank Setting
40 T6 Foot
2nd CH
circuit 50 to 70° F 50 to 70
Initial reading: • This function is not currently supported.
• Sets min. target boiler temperature dur-
ing call for heat from 2nd CH circuit (same
function as T1 Foot for rst CH circuit).
P . 4 0
After 2 to 3 seconds:
Blank Blank Setting
41
T6
Differential
2nd CH
circuit
2 to 54° F 2 to 54
Initial reading: • This function is not currently supported.
• T6 Differential is the differential (hyster-
esis) for call for heat from 2nd CH circuit is
master. Boiler starts when outlet tempera-
ture drops T6 Differential below target out-
let temperature.
P . 4 1
After 2 to 3 seconds:
Blank Blank Setting
42
(1st
digit)
42
(2nd
digit)
Special pump
CH/DHW
Low/Off cycle
0, 1, 2, or 3
(see right)
0
(feature off)
1
(feature on)
0 to 3
0 or 1
Initial reading: First digit (Special pump CH/DHW):
• 0 - NOT RECOMMENDED
Normal circulator operation for CH and DHW
• 1 - NOT RECOMMENDED
Boiler circulator off on CH call for heat.
Normal circulator operation on DHW.
• 2 - RECOMMENDED SETTING
Boiler circulator normal operation. DHW
circulator 5-second delay before starting.
• 3 - NOT RECOMMENDED
Boiler circulator off on CH call for heat.
DHW circulator 5-second delay before
starting.
Second digit (Low/Off) cycle):
• If boiler continues ring at low re for 3
minutes or longer, the boiler will begin
cycling like an on/off boiler, ring only
at low re, for cycle times of 10 minutes.
• The boiler will return to normal (modulat-
ing) operation if the burner is either off or
on for at least 9 minutes.
P . 4 2
After 2 to 3 seconds:
Blank Blank Digit
1Digit 2
Continued

19

Parameter
No. Changed Original   Date of Change Reason for Parameter Change

For technical assistance with this product call toll free 1-800-325-5479
ECR International
PO Box 4729
Utica, NY 13504-4729
www.ecrinternational.com