Bosch GWH 345 ESR Applications Manual page 11
Tankless water heaters
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Also See for GWH 345 ESR:
- User manual (40 pages) ,
- Applications manual (50 pages) ,
- Applications manual (48 pages)
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GWH 345/450 ESR applications manual
4.1.1 Radiant space heating and DHW electrical diagram
The following shows the appropriate electrical connections for plumbing diagram 4.1.1
24 VAC
POWER
SR 502
FUSE 1 AMP
N
P
Neutral
120Vac
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.
BOSCH THERMOTECHNOLOGY CORPORATION
Terminal box
PK
P0
PS
L
N
LL
N
T
T
Stat
Stat
ZONE1
ZONE2
TWO ZONE SWITCHING RELAY
X
2
ZC
H
X
ZR
ZONE1
ZONE2
1
P1
P2
Radiant Space Heating and DHW
Electrical Diagram
PE
L
ESR control
board
PS
110VAC from outlet
PCB
Drawing # EROL
CN
revA 10/07
Applications manual | 02.2009
| 11
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