Copyright © tekmar Control Systems Ltd. 2000
tN2
Zone 1
400
Zone 2
Zone 3
Zone 4
Vlv
C
Do not apply power
Sensor Inputs
Com
Boil
Out
R
2A
DHW
Setp
Input
Power
Max 3.7A combined
Rear of control
Sys.
Pmp
L
Pump Power
Max.10A
5A
24V(ac) 100VA Max.
Call
tN2 Thermostats only
Dry switch or 24V(ac)
Boiler
Mod Vdc
+
-
tN4
T
Boil Exp.
Stage 1
Stage 2
or mA
401
Zone
4
3
2
1
Max. 12A
Floating Action
Cls
Opn
402
Mix Exp.
Mix
Pump
Pwr
Var.
2.4A
Max.12A
403
24V(ac)
100VA Max.
Z2
Z3
Z4
Z1
Max.3.7A
406
Rc2
Y2
Tank
Exp.
Boil / Mix
Backup
HP
Loop
Tran
sfer
Sensors - Do not apply power
Ret
Mix/
No power
Heat Pump
Rc1
O/B
Y1
(w)
(c)
480
Dem
Demand
481
Rly
Relays
482
N
H. A.
RS 232
R J 45
6
7
8
9
10
C0
C1
C2
C3
C4
5
11
12
0
440
57
56
2.5A
51
52
53
54
55
System
59
58
Variable Speed
Shape.hlp!#9000 Copyright © 1997 Visio Corporation. All rights reserved.
7.5A (max)
No Power
Powered Output
Variable / Floating
440 DIP
479
441
XX
Boil Sens Sup / Ret
Off / DHW Sensor
Off / tekmar Stager
Boilers On-Off / Mod
Off / Rotation
423 DIP
/
423
Primary
81
82
50
Stage 1/
Boil Enbl
Stage 2/
Mod1(dc)
Setp Enbl
10A (max)
66
69
70
67
68
79
80
60
61
62
63
64
65
Mod2(dc)
75
76
77
78
Setpoint
1 VA
71
72
73
74
24 V (ac)
8 VA
Off / Flushing
421 DIP
421
System P1
tN4 Boiler / Mix 2
Boiler On-Off / Mod
422 DIP
422
Mix Sys P1
Output 1VA
24V (ac)
Mod (dc)
Boil/Mix2
Boil On-Off / Mod
420 DIP
420
Powered
444
Mod
Sys
2-10 V (dc)
Variable
444 DIP
0-10 V (dc)
Actuator
5Vdc
transformer
120Vac
13
14
Boiler Bus
Bus 1
Bus 2
Bus 3
Alert
Input 1
486
Input 2
Input 3
Ethernet
Dry switch or 24Vac