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© 2019 tekmar 304V_D - 10/19
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 signal 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 of room temperature swings
• 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
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
FUSE 6
70 80
90
60
50
100
MOD MAX %
Mod Max % dial set to 100% in the illustration.
Setting the Max Mod % Dial
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
