Bosch Evolution 500 Series - PCB Jumper Installation and Evaluation; Model and Gas Type Identification; Jumper Configuration; Reinstalling the Control Unit

2
|
G3-24 | 715ES, C800ES, 2400ES, 2700ES, Evolution 500, Integra 500
Service bulletin
Data subject to change without notice | Printed in the USA | BTC 710002318 D | 06.2012
Bosch Thermotechnology Corp.
Bosch Thermotechnology Corp.
50 Wentworth Avenue
Londonderry, NH 03053
Tel: 1-800-642-3111
Fax: 1-603-965-7581
www.bosch-climate.us
 Locate rating plate sticker on right side of heater cover.
Determine model number (Fig.1, pos.A) and gas type (Fig.1,
pos.B).
Figure 1
PCB jumper installation
 In order for the appliance to work correctly, the proper jumpers
must be installed on the PCB board. (Fig.4)
Backside of control unit
B
ackside o
f
control uni
t
Figure 4
 Based on your model and gas type, jumpers should be installed
on the PCB in the following arrangement:
Model 2400 ES:
Natural
Gas
N
atura
l
Gas
Figure 5
Liquid
Propane
Models: C 1050 ES, 940 ES/ESO, 2700 ES, C 800 ES, 715 ES,
Evolution 500 (WTD 27), or Integra 500 (WTD 30)
Figure 7
Natural
Gas
Liquid
Propane
Replacing control unit
 Once the appropriate jumpers have been determined, remove
rear cover of replacement control unit.
 Install jumpers in the proper location on PCB.
 Connect green ground wire from power cord to replacement
control board with Phillips head screw. (Fig. 3, pos. 8).
 Reconnect black and white power cord wires to terminal
block on replacement control unit; Black -L (Load), White - N
(Neutral). Secure to terminal block by tightening flat head
screws. (Fig. 3, pos. 7).5. Reconnect yellow/green striped
ground wire to spade connection on replacement control
board. (Fig. 3, pos. 6).
 Reattach large ignition wires to replacement control board (no
polarity). (Fig. 3, pos. 5).
 Reconnect small electrical strip connector to replacement con-
trol board. (Fig. 3, pos. 4).
 Reconnect medium sized electrical strip connector to replace-
ment control board. (Fig. 3, pos. 3).
 Reconnect two large electrical strip connectors to replacement
control board. (Fig. 3, pos. 2).
 Reseat rubber wire restraints in control unit. (Fig. 3, pos. 1).
 Replace rear cover on unit using 6 Phillips screw (Fig. 2, pos.3).
 Place control unit back into water heater and secure with 3
Phillips head screws. (Fig. 2, pos. 1).
 Plug water heater power cord back into electrical outlet and
push On/Off button on water heater to “ON”.