Weil-McLain GV90+ Installation And Start-Up Manual page 86

GV90+ Series 2
oAs·FIRED WATER BOILER -
Boiler Manual
Troubleshooting
(cootinuedJ
FLAME & POWER
IAW ARNINBI Eloctrlealshoek hazerd Wherew>r you see TURN OFF POWER,
lollow
the Instructions. Falure to folow
- · lnstructkwls could result In severe rsonal ln u • death or slbstantlal pro ert dama e.
At8 manual main shutoff vaiYs and gas valve tum6d on?
No
I
~
• Open maooal gas valve.'
• Cheek
gas
vaMI harll8S$ wtres and cheek for tight wtrfng connectloos
on gas valve and IBC. Rapalr/repiace as naoossary.
• Re&1art boiler, lollowlng Operating
lns~uctlons
on boiler
• Racycle lloller lly thermostat
0<
service switch (holding power off for
(soe Flgo.re 76, page 67).
at least 45 seconds).
• Check lor proper operation (per normal sequence of
• Thermostat shouk:t call for heat and appropriate zone vaJves close.
operation).
During step 5 of normal sequenca ol oparatlon (Figure 75, paga 66),
Is
there
24
VN; across gas valw tBmllnals?
No
I
Vas
• Replace iBC.
• Retest.
• RemOYe Inducer/gas
vatve
assembly. Clean burner cone
lnsurf~
no
debris Is In between inner and outer cone. Remove gas manito from
gas vaJve and Inducer. Run a small wire through manifold to remove
Si>der wells. Cheek
gas
entry hole
In
lloHO<O ol lnduoer for posslllle
dellrls
0<
llugs and clean thoroughly.
• Cheek
and/0<
replacelgnfter,
n
cold reslstanca Is not lletw9en 40.75
ohms. Racycle boiler
lly
thermostat or servloe
swftch.
Thermostat
should cal for heat and a:pfl(()flrlate zone vaJvas close.
• Wait 5 minutes.
At8
FLAME
&
POWER
Ngttsllaslling?
No
I
~
• Boiler should now oparate normally.
• Original flashing FLAME light caused by I!Jllter 1101
operating properly.
• See normal sequenoe of operation (Figure 75, page 66).
•
Chack and/or
neplace
gas
valw. Gas valve energlzas with 19-23 VDC .
Racycle llolk>r lly thermostat or servloe
swftch.
Thermostat should
cau for heat and awroprlate zone valves close.
•
walt
5 mlnutes.
An> FLAME
&
POWER
Nghfsllashing?
No
I
Yes
• Boiler should now operate normally.
• Original flashing FlAIIE flghl caused by gas val\19 not
operating P<opelfy.
• See normal sequence
ol
operation (Rgure 75, page 66).
• Call your local Well-Mclain
sales 1911'esentative.
86
Pan
number
550-142-783/10 12