Power Supply And Grounding - Honeywell MicroniK 200 R7426A Installation & Start-Up Instructions

POWER SUPPLY AND GROUNDING

1. Refer to job drawings and verify correct supply voltage to
transformer (230 Vac) and controller (24 Vac).
2. Connect line power conductors to transformer primary.
Line power must be supplied from a breaker panel with
dedicated controller circuit. Do not turn the line power on
until all wiring has been checked against job drawings.
R7426A
15
16
17
18
24V
24 V
19
20
21
24V
22
23
24
25
26
27
28
W303
1)
Jumper State
closed T3 supplied by this controller
2)
W303
open T3 supplied from another controller
1)
Default jumper position = closed
2)
Cut (open) jumper W303 only if the T3 input is fed from
another controller (parallel connection, max. 6 devices). This
disconnects the T3 input from the internal power supply.
Wiring Run Controller to CPA/SPA Potentiometer *
R7426A,B,C T7412B1016
Terminal 2 Terminal 4
Terminal 4 Terminal 5
or Summer/Winter
Changeover
Occupancy
1
*
2
CPA/SPA
3
T1
T1
4
5
T2
T2
6
7
T3
T3
8
9
ON/OFF
Plant /
System
10
11
Freeze
prot.
12
13
14
= 0V
Description
T7412B1057/1008 T7412B1024
T7512C1030/1006 T7412B1040
Terminal 4 Terminal 4
Terminal 6 Terminal 5+6
Fig. 3. Wiring diagram and jumper coding
R7426A,B.C Temperature Controller
3. Connect transformers 24 Vac secondary to the controller
terminals 18 and 19. Connect one conductor to terminal
marked 24 V∼ and the other to terminal marked 24 V⊥. If
controllers are interconnected all terminals 19 must be
connected to the same potential 24 V⊥ level.
R7426B
200mV/%rh
15
16
17
18
24V
24 V
19
20
21
24V
22
23
24
24V
25
26
27
24V
28
R7426C
200mV/%rh
15
16
17
18
24V
24 V
19
20
21
24V
22
23
24
24V
25
26
27
24V
28
• Outputs are not isolated from power supply
• Observe correct phasing with 24 Vac power
supply
3
1
2
CPA/SPA
3
T1
4
5
T2
6
7
T3
8
9
ON/OFF
10
11
12
13
14
= 0V
1
2
CPA/SPA
3
T1
4
5
T2
6
7
T3
8
9
ON/OFF
10
11
12
13
14
= 0V
CAUTION
EN1B-0206GE51 R0602
Occupancy
*
T1
T2
T3
Plant /
System
Freeze
prot.
Occupancy
*
T1
T2
T3
Plant /
System
Freeze
prot.