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Applications Manual
Application 5 Wiring:
Prim Pum p
Com b
CH
DHW
Fuel
Flow Proof
C.A. Proof
CH
IDHW
Fuel
FlowProof
Air Proof
Call
Tan k Call
Sw it ch
Call
Call
Call
Call
Switch
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9 10
M eet s Class B: Canad ian
Meets Class B: Canadian
ICES & FCC Part 15
ICES & FCC Part 15
External Flow Proof / Off
Prim Pum p Flow Proof / O
Com b Air Proof / O
External C.A. Proof / Off
Off / Exercise
O / Exercise
Setback / Off
Set b ack / O
47 48
49 50
51 52
47 48
49 50
51 52
Primary
Primary
Prim ary Prim ary
Pump
Pum p
Pump
Pu m p
+
+
-
-
P1
P2
Mod
P1
P2
M od
1
Prim Pump
Flow Proof
2
3
Comb Air
Proof
4
5
CH
Call
6
7
DHW Tank
Call
8
9
Fuel
Switch
10
11
20V dc Out
12
mA (+) In
13
5V dc Out
14
V dc (+) In
15
Gnd (-)
16
EMS (+)
17
Outdoor
18
Prim Sup
19
Com (-)
20
Prim Ret
21
DHW
22
Com
23
Com Flue
24
Boil In
25
Com
26
Boil 1 Out
27
Boil 2 Out
28
Com
29
Boil 3 Out
30
Boil 4 Out
31
Com
32
tN4
Bus b
Boiler
C0
33
34
Bus 1 tN4
35
Boiler
C1
36
Bus 2 tN4
Boiler
C2
37
38
Bus 3 tN4
39
Boiler
C3
40
A
RS485
B
41
42
Gnd
43
Auxiliary
44
Bosch Thermotechnology Corp.
20V
m A
5V
Vd c
Gn d
EM S
Ou t
Prim
Com
Prim
DHW
Com
Com
20V
mA
5V
Vdc
Gnd
EMS
Out
Prim
Com
Prim
DHW
Com
Com
d c
(+ )
d c
(+ )
(-)
(+ )
d oor
Sup
(-)
Ret
Flu e
Sup
Ret
Flue
dc
(+)
dc
(+)
(-)
(+)
(-)
Out In Out In
In
Out In Out
In
In
11
11
12 13
12 13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23 24 25
23
Temperature Sensors - Do Not Apply Power
Flow
Pressure
Pressure
Temperature Sensors - Do Not Apply Power
Flow Sensor
Sen sor
Sen sor
Sensor
53 54
55 56
57 58
59 60 61 62 63 64
65 66 67 68 69 70
53 54
55 56
57 58
59 60
61 62
63 64
65 66
Boiler 1
Boiler 1
Boiler 2
Boiler 2
Boiler 3
Boiler 3
+
+
-
-
+
+
-
-
Stage 1
Stage 2
Mod
Stage 1
Stage 2
Mod
Stage 1
St ag e 1 St ag e 2
M od
St ag e 1 St ag e 2
M od
St ag e 1 St ag e 2
Permanent
Call (Jumper)
Burner Switchover
To Oil
Outdoor
Sensor (S1)
Primary Supply Sensor (S2)
Primary Return Sensor (S3)
DHW Sensor (S4)
Boiler 1 Outlet Sensor (S6)
Boiler 2 Outlet Sensor (S7)
Boil
Com
Boil 1
Boil 2
Com
Boil 3
Boil 4
Com
t N4
Boil
Com
Boil 1
Boil 2
Com
Boil 3
Boil 4
Com
tN4
In
Ou t
Ou t
Ou t
Ou t
BACn et IP
Bus b
In
Out
Out
Out
Out
BACnet
Bus b
Boiler
Boiler
24
25
26
26
27
27
28
28
29
29
30
30
31
31
32 33
32 33
Home
Home
Heatronic 4000
Heatronic 4000
4 boiler control, DHW, BACnet and Modbus
4 boiler control, DHW, BACnet and Modbus
71 72 73 74
75 76
67 68
69 70
71 72
73 74
75 76
Boiler 4
Boiler 4
Boiler 1
Boiler 1
+
+
-
-
Stage 2
Mod
Stage 1
Stage 2
Pump
M od
St ag e 1 St ag e 2
Pum p
45
Alert
Dry
46
47
Primary
Pump P1
48
49
Primary
Pump P2
50
51
Mod
52
53
Stage 1
54
55
Stage 2
56
57
Mod
58
59
Stage 1
60
61
Stage 2
62
63
Mod
64
65
Stage 1
66
67
Stage 2
68
69
Mod
70
71
Stage 1
72
73
Stage 2
74
75
Boiler 1
Pump
76
77
Boiler 2
Pump
78
79
Boiler 3
Pump
80
81
Boiler 4
Pump
82
83
Power
In
84
85
DHW
Tank Pump
86
Bosch Heatronic 4000 Controls | 19
C0
t N4
C1
t N4
C2
t N4
C3
B
A
Gn d
C0
tN4
C1
tN4
C2
tN4
C3
A
B
Bus 1
Bus 2
Bus 3
(+ ) (–)
Bus 1
Bus 2
Bus 3
Gnd
Boiler
Boiler
Boiler
RS485
RS485
Boiler
Boiler
Boiler
34 35
34 35
36 37
36 37
38 39
38 39
40 41
40 41
42
42
tekmarNet Communication
tekmarNet Communication
tektra 1056-01
Input Power:
115 V (ac) ±10% 60 Hz, 18 VA
Primary Pump Relays:
230 V (ac) 10 A, 1/2 hp
MANUAL
Manual
Boiler & IDHW Pumps:
OVERRIDE
230 V (ac) 5 A, 1/3 hp
Override
Auxiliary & Alert Relays:
230 V (ac) 5 A, 1/6 hp
Boiler Stage Relays:
158033
24 V (ac) 5 A
Typ e 1056-XX
Calls: 24 V (ac) or Short
WARNING! Before op ening
Signal wiring must be
the cover d isconnect from
Caution! Disconnect All
rated at least 300 V.
p ow er sup p ly
Power before Opening
Designed and
assembled in Canada
77 78
79 80
81 82
77 78
79 80
81 82
Boiler 2
Boiler 2
Boiler 3
Boiler 3
Boiler 4
Boiler 4
Pump
Pump
Pump
Pu m p
Pum p
Pu m p
L
Primary Pump 1 (P1)
N
+
+
Mod
-
-
Modulating
T
Gas Burner
Stage 1
T
+
-
T
Stage 1
T
Two Stage
T
Oil Burner
Stage 2
T
+
+
Mod
-
-
T
Stage 1
T
+
-
L
Boiler 1 Pump (P2)
N
L
L
115 V (ac) Power Supply
N
N
L
Indirect DHW Pump (P4)
N
Data subject to change
Alert
Au xiliary
Dry
Auxiliary
Alert
43 44
43 44
45 46
45 46
tekt ra 1056-02
Inp ut Pow er:
115 V (ac) ±1 0%, 60 Hz, 18 VA
Prim ary Pum p Relays:
230 V (ac), 10 A, 1/ 2 hp
Boiler & DHW Pum p s:
230 V (ac), 5 A, 1/ 3 hp
Boiler St ag e, Auxiliary &
Alert Relays:
230 V (ac), 5 A, 1/ 6 hp
Calls: 24 V (ac) or Short
Signal w iring m ust b e
rated at least 300 V.
Designed and
assemble d i n Canada
b y tekm ar Cont rol System s
83 84
85 86
83 84
85 86
Power In
Pow er In
IDHW
DHW
Tan k
L
N
Pump
L
N
Pu m p
Dual Fuel
Boiler
Modulating
Boiler
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