User Guide

5 of 8
- Application
Boiler Control 260
A 260-3
03/09
Copyright ©2009 A 260-3 03/09
Mechanical
M
MM
Outdoor
Sensor (S2) 070
DHW
Tank
Class 2
Transformer
120 V (ac)
24 V (ac)
Boiler
Sensor
(S1) 082
P1
P2
A2
A1
T1T2T3
Z1Z2Z3
260
Note: This is only a concept drawing. The designer must determine whether this application will work in his system and must ensure compliance with
code requirements. Necessary auxiliary equipment, isolation relays (for loads greater than the specified tekmar internal relay ratings), and other safety
and limit devices must be added.
Electrical
A1 = DHW Aquastat
A2 = DHW High Limit Aquastat
P1 = Boiler Pump
P2 = DHW Pump
S1 = Boiler Sensor 082
S2 = Outdoor Sensor 070
T1, ..., T3 = Thermostats
U1 = tekmar Timer 033 (optional)
Z1, ..., Z3 = Zone Valve Motor End Switches
Zone Valve
Motor End
Switches
Boiler
260
12468 10 11
Boiler
Demand LN
3
Power
5
9
Boil
Do not apply power
13 14 15 16 17 18
Com
Sw
UnO
Com
Boil
Out
12
Indr
DHW
Demand
7
P1 N
DHW
Pmp/Vlv
Boiler
10A
10A10A
U1
S1
S2
24 V (ac)
120 V (ac)
Class 2
Transformer
N
L
C
R
P2
P1
A2
Z1
Z2
Z3
A1
= Required
= Optional
= Not Used
Off
Installer
Advanced
DHW during UnOcc
DHW Pump
Off
DHW Priority
DHW Valve