Specifications

42
stcudorP retaW htimS .O .A Service Workbook
Ashland City, Tennessee 2005© Training Department
CENTRAL CONTROL BOARD
Opens if water is below the cut off
sensor - CSD1 and IRI equipped
boilers.
Adjustable at tank (typically 100 -
185° F). If used , stage settings
are controlled at the inlet probe.
Used to extend allowable vent
length. See page 14 of this
manual.
Open at 5.25" W.C. gas manifold
pressure (12.8" W.C. Propane).
IRI and CSD1 equipped models
only.
Supplied with GW models. CCB
dip switch "D" is 'ON', dip switch
"G" is 'OFF'. adjustable 80°-
190° F. Senses for staging.
Thermistor
'D' boxes on back
of boiler
Yellow
Yellow
24V
OPTIONAL INPUTS
1. This unit may have all, some, or none of the above
options.
2. For correct number of blowers & blower prover switches.
Plesse consult the wiring diagram as supplied with
the unit.
IRI only - Operates to indicate
any type of lockout.
ALARM
BELL
IRI GAS VALVE
PROVER SW*
EXTERNAL
THERMOSTAT*
POWER VENT
CONTROL &
PROVER SW*
LOW WATER
CUT-OFF
& SW.*
HIGH GAS
SW #1*
HIGH GAS
SW #2*
HIGH GAS
SW #3*
HIGH GAS
SW #4*
REMOTE TEMP
PROBE*
0-5V DC
CN11-5
CN13-8
TB1-9
TB1-11
CCB
K1
K2
CN3-1
CN11-2
CN11-1
CN3-3
CN13-9
CN2-2
CN2-1
CN13-5
CN13-4
CN13-3
CN13-2
CN14-4
CN11-3
24V AC
24V AC
24V AC
24V AC
24V AC
EXT 24 D-BOX-5
EXT 24 D-BOX-1
EXT 24 D-BOX-7
EXT 24
D-BOX-3
D-BOX-4
TB3-40
EXT 24
TB3-36
EXT 24 D-BOX-2
TB3-28
TB3-29
TB3-31
TB3-32
TB3-33
TB3-30
TB3-27
TB3-26
TB3-41
TB3-37
CN11-6
TB1-10
24VAC HOT
24VAC NEUT.
24VAC NEUT. CN11-4
24VAC HOT
EXT 24 D-BOX-6