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RoomResponse
TM
Signal
The RoomResponse
TM
signal adjusts the temperature of
a modulating condensing boiler that accepts a 0-10 V(dc)
or 4-20 mA input. It works by continually adjusting boiler
water temperatures to the lowest possible value to meet
comfort without wasting energy. This is done by monitoring
each thermostat's on and off time pattern and determines
the ideal water temperature for each zone. The control
then chooses the highest water temperature requirement
of all the thermostats and provides a 0-10 V (dc) or 4-20
mA signal proportional to the boiler operating temperature.
The RoomResponse
TM
signal is a DOE compliant method
of controlling boiler temperature to building load. The
RoomResponse
TM
signal is not available to on/off boilers.
Benefits of the RoomResponse
TM
signal include:
• Increase in boiler efficiency
• Reduction in room temperature swing
• Reduction in expansion noises from heating pipes
Mod Max % Dial
The upper limit of the 0-10 V (dc) or 4 -20 mA signal to
the modulating condensing boiler can be set using the
Mod Max % Dial.
This sets the upper temperature limit for the boiler.
The dial is only applicable to controls set as the Master.
Mod Max %
Max Voltage
Max mA
50
5
12
60
6
13.6
70
7
15.2
80
8
16.8
90
9
18.4
100
10
20
FUSE 6
70 80
90
60
50
100
MOD MAX %
Mod Max % dial set to 100% in the illustration.
Boiler Make/Model
Required Adapter
(Supplied by boiler
manufacturer)
0-10 V (dc) /
4-20 mA
DIP Switch
Mod Max % Dial for Boiler Design Temperature
120°F
140°F
160°F
180°F
Aerco AM series
Not required
0-10 V
50%
65%
80%
100%
Bosch Greenstar
ICM Module
0-10 V
55%
70%
80%
100%
Buderus GB142, GB162
EM10 Module
0-10 V
50%
60%
75%
90%
Burnham
®
Alpine
™
*
Not required
4-20 mA
50%
70%
85%
100%
Camus
®
Modulating Micoflame
®
Not required
0-10 V
50%
60%
70%
85%
HTP Elite
Not required
0-10 V
50%
65%
80%
90%
IBC VFC and SL series
*
Not required
0-10 V
65%
75%
85%
100%
Laars
®
Mascot LX
Not required
0-10 V
55%
70%
85%
100%
Laars
®
Mascot FT
Not required
0-10 V
50%
65%
80%
100%
Lochinvar
®
Knight
™
Not required
0-10 V
55%
70%
85%
100%
Lochinvar
®
FTXL
*
Not required
0-10 V
55%
70%
85%
100%
NTI Trinity Fire Tube and LX
Not required
4-20 mA
55%
65%
75%
90%
Peerless PureFire
PFA-1 Adapter
0-10 V
55%
65%
75%
90%
Raypak Xfyre, Xtherm, MVB, XPakFT
Not required
0-10 V
55%
65%
80%
90%
Riverside HeatStation
*
Not required
0-10 V
50%
65%
85%
100%
Viessmann 100-W, WB1B
OpenTherm Module
0-10 V
55%
70%
85%
100%
Viessmann 200-W, B2HB and 300 CU3A
Not required
0-10 V
50%
60%
70%
80%
Weil-McLain
®
Evergreen
*
Not required
0-10 V
50%
70%
85%
100%
* Requires changes to boiler's settings
Setting the Max Mod % Dial
Expansion Terminals
• Connect the five wires of the expansion bus from the
master to the member controls.
Terminal Description
A/tN4
Away signal connecting tekmar thermostats
B
RoomResponse
TM
signal from member controls
C
Power common
D
Demand signal. 0 Vdc = demand. 2 Vdc = no
demand
E
Priority signal. 0 Vdc = priority. 2 Vdc = no priority
