Applications manual | 11.2007Bosch Water Heating
Applications manual
| 33
5.1.1 Radiant space heating and DHW electrical diagram
The following shows the appropriate electrical connections for
plumbing diagram 5.1.1
Note: This drawing is conceptual in nature and does not address all design, installation or safety considerations.
Additional safety and/or auxiliary equipment may be needed. This diagram is for reference use by officials, designers and licensed installers.
It is expected that installers have adequate knowledge of accepted industry practices for the equipment, procedures, and applications involved.
Drawing is not to scale.
Drawing # EROL
CN revA 10/07
Radiant Space Heating and DHW
Electrical Diagram
PK
L N
P0
LL
PS
N L
PE
ESR control
board
PS
Terminal box
110VAC from outlet
NPZCHX1 ZR
X
2
FUSE 1 AMP
24 VAC
POWER
TWO ZONE SWITCHING RELAY
SR 502
ZONE1 ZONE2
ZONE1 ZONE2
P1
P2
120Vac
Neutral
T
Stat
T
Stat
PCB
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