Weil-McLain CGi Series 3 Installation And Maintenance Manual page 38

CG i
GAS-FIRED wATER BOILER- sERIEs a -
Boiler Manual
9a
Operation - sequence
(continued)
- The circu1ator continues to operate.
8. Lower room thermostat setting to stop call for heat Themtostat is satisfied - Pilot
and main gas valves are
d osed - Inducer operates for IS-second postpurge - Circulator is shut off.
9. Boiler is now in the off cycle.
10. Repeat steps 1 through 6 several times to verify operation.
I I. Return the thermostat to normal setting.
12. Set thermostat heat anticipator setting as instructed in Figure 32, page 40.
Figure 30 Control module seque nce of o pe ra tion - s tatus light ind ica tions
Steps Can for
POWER
TSTAT LIMIT
PURGE
FLAME TIMING
{I:IIIOWing
&1£1:17,
cycle goes
Dadt ~
$:ep
1.)
heat?
j l
CIRC
1\
j l j l j l
'·
S1andby
• wamng
w
call
tor
neat
NO
6
0 0 0 0
-
2.
Can fat heat
6 6
0 0
0
-
YES
• actlalOt
on
3. limit circuit
• uml! oo«.rol5
Ci06e(l
YES
j l j l j l
0 0
-
• Rollot.t TfE COf'llac:f.:6
CfOSe(l
••
Inducer
• Inducer tum& on
YES
li
ji
li
0 0
-
5.
Pressure circ uit
• Pre"'-ft 6'1&:1'1
CCifltaoi5
CI06e<l
YES
ll
I' I II
li
0
35sec
• Prepurge 1t:1r 10
&eOOnCI5
G.
Pilot flame proven •
Gao
va!Ye
open
6 6 6 6 6
15sec
YES
• PilOt remoifn& on
• BCi'IH ptOOI.I(::h) heat
7.
Limit cycle
• uml!
ct'CIJl
open
YES
6 6 6
0 0
-
• Ga5
va!Ye
CI06e0
8.
Aameoutage
• Flameout
NO
6 6 6
0 0
-
• BCi'IH recyciK
9.
Thermost at satisfied
• Cfrctla:« o=
NO
j l
0
i6 j l
0
15sec
10. Circulator exercise routine
• Cfrctla:« tum5
on
tel' JO
5e001'1C161f
NO
j l
0 0 0 0
3D sec
a
= " ON'"
0
=
"OFF"'
See Sec-bon 9a, Hem 4b for control response to f ailure to proven pilot flame.
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38 Part Number 550-142-780/0712