Aqua-Hot 375-d Service Manual page 11

Figure 4
2
3
4
1 I
NTERLOCK SWITCH
2 Z -1 R
ONE ELAY
3 Z -2 R
ONE ELAY
4 F B
USE LOCK
5 C
IRCULATION
6 D
IESEL -B URNER
S
ECTION
1
13
6
5
P - Z 1
UMP ONE
®
© 2009 Aqua-Hot 375D Hydronic Heating System Service Manual—Rev. A
1: I
NTRODUCTION TO THE
12
Diesel Burner
High-Limit Thermostats
7
7 S D
YSTEM RAIN
8 D
IESEL -B URNER
9 D B
IESEL URNER
10 L T
OW EMPERATURE
11 F S
LOAT WITCH
12 D
IESEL -B URNER
Electric Element High-Limit Thermostat
13
Electric Element Control Thermostat
A -H
QUA
11
Float Switch
10
Low Temp. Cut-off
Thermostat
Diesel Burner
Control Thermostat
9
8
C
ONTROLLER
C T
ONTROL HERMOSTAT
C T
UT - OFF HERMOSTAT
H T
IGH -L IMIT HERMOSTATS
— Page 11 —
375D
OT