Weil-McLain GV90+ Installation And Start-Up Manual page 11

GV90+ Series 2
oAs·FIRED WATER BOILER-
Boiler Manual
Prepare the boiler
(continvedJ
Perform hydrostatic pressure test
Pressure test boiler befor• attaching water or
gas
piping (exctpl as
noted below) o r electrical supply. Remove jacket
top
panel before
pro<t<ding.
IAWARNINGI
Use two wrenches wh.en dghtenlng water piping at
bollar, using o ne of rhe wrenches to prevent
the
boil~r
interior piping from turning.
Fall u~
to support the boill"r
piping connections to prevent them
from
turn ingoo~.Jid
caus.e damage to boiler components.
Prepare boiler lor test - see Figure 10
Stop 1 Connec>t a bose from water supply to
fill
aod
drain
boiler
for h)rdrosraric test. Hose is nor included with boiler.
Step 2
Connect
hose ro boiler drain vahre. Make
sure
hose can
also
be
used to drain boiler after test
Step 3 Rtmove I" nipple. I" tee, bushing and pressure/tempera-
ture gauge from accessory bag. Pipe to boiler supply con-
nection as shown. Use pipe dope sparingly.
Step 4 Connect a nipple and shuroff
valve to system supply
connection on the 1"
tee.
This
val~
will be
used
ro bleed
alr
dwilng tbe 611. Valve and nipple are not included "ith
boiler.
Step 5
Connect a nipple and shuroff
valve to system rerum
c-Onnec.ti.on
at
drc.ulator flange.
This
valve will be
1.lSled
to
bleed
alr
during the
fill
Valve and nipple are not included
with boiler.
Step 6
Install a
o/4•
pipe plug in the
rtlitf
vah·e opening. rop of
the rear boiler section, as shown. Plug is not included with
boiler.
Fill and pressure test
I. Connect 611 water supply through drain valve, ltem 2.
2. Fill
boiler wirh water (be sure bleed valves at
4
and 5 are op01).
3. · w hen water flows from bleed valves, shur off water at dtaln
\'lllve.
4.
Close
bleed valves.
5. Slowly reopen drain valve (item 2) until test pressure of 45 PSIG
(or 1.5 times boiJtr relief valve setting- NEVER MORE than
75 PSI G) Ls reached on < he pressure gauge.
6. Tesr at this pressure for no more
than
10 minutes.
IAWARNNGI Do nolleave boiler unattended. A cold
ll~ler
fill
rould
expa.nd and cause excessive pressure, resulting in
Si!\'t're
personal injury, death or substantial property dama.ge.
1. Make sure
co~rant
gauge pressure has been maintained
through-
out
test. Check
for leaks. Repair if found.
IAWARMNGI Leaks must
be
rtpaired
aronce. Failure t:odoso can dam·
age boiler, resulting in substantial property damage.
t~j•Of!Hj;l
Do not use petrOleum-based deaning or sealing CQm-
pounds in boiler sysrem. Severe damage
to
boila
wm
occur, resulting in substantial properr,• damage.
Part number 550-14-2-783/1012
Figure 10 Piping conneclions for hydrostalic lesl
Drain and remove fittingo
1.
Disconne.:.t fi1l water hose from water source.
2.
Dral11 bobt:r at drain vahll: or out hose, whichever pro-
vidt.s best
access
to dmln. dost drain valve tuld reJnovt
h~
after cl.rnining..
3. Rto:mJ I)\'e
l'lug
{itmi 6) from rditfvalve rappU\8;
4..
lsola.tion
viti
\'ell:
at<"
m.L uif'C!'d
10
enable
servicing uf th(
boiler' s temp«ature Sc.'nSor.
11