Bosch GWH 345 ESR Applications Manual page 15

GWH 345/450 ESR applications manual
4.1.3 Baseboard/Radiant Panel space heating and DHW electrical
diagram
The following shows the appropriate electrical connections for
plumbing diagram 4.1.3
24 VAC
POWER
SR 503
or equivalent
FUSE 1 AMP
N
Neutral
120Vac
Note: This drawing is conceptual in nature and does not purport to 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.
BOSCH THERMOTECHNOLOGY CORPORATION
Terminal box
PK P0 PS
L N LL N
PK
T
Stat
ZONE1 ZONE2 ZONE3
THREE ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
X
2
P ZC H X ZR ZONE1 ZONE2 ZONE3
1
P1
Baseboard Space Heating and DHW
Electrical Diagram
PE
L
ESR control
board
TT
LR
110VAC from outlet
LS
AQUASTAT
Drawing # EBBOL
CN
Applications manual | 02.2009
| 15
revA 10/07