Weil-McLain CGA25SPDN Boiler User Manual


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Part Number 550-101-009/0107

GOLD CGa Gas-Fired Water Boiler — Boiler Manual
Fill the system with water
 #LOSEMANUALANDAUTOMATICAIRVENTS and boiler drain cock.
2.
&ILLTOCORRECTSYSTEMPRESSURE#ORRECTPRESSUREWILLVARYWITHEACH
application. Typical cold water fill pressure for a residential system is
12 psi.
3.
0URGEAIR from system:
A #ONNECTAHOSETOTHEPURGEVALVESEEdrain valves, item
, in sug-
gested piping diagrams on pages 17 through 23, &IGURE through
&IGURE). Route hose to an area where water can drain and be
seen.
B #LOSETHEBOILERORSYSTEMISOLATIONVALVEBETWEENTHEPURGEVALVE
and fill connection to the system.
C #LOSEZONEISOLATIONVALVES
d. Open quick-fill valve on cold water makeup line.
e. Open purge valve.
f. One zone at a time, open the isolation valves. Allow water to run
through the zone, pushing out the air. Run until no noticeable air
mOWISPRESENT#LOSETHEZONEISOLATIONVALVESANDPROCEEDWITHTHE
next zone. Follow this procedure until all zones are purged.
G #LOSETHEQUICKlLLWATERVALVEANDPURGEVALVEANDREMOVETHE
hose. Open all isolation valves. Watch that system pressure rises to
correct cold-fill pressure.
h. After the system has operated for a while, eliminate any residual air
by using the manual air vents located throughout the system.
i. If purge valves are not installed in system, open manual air vents in
SYSTEMONEATATIMEBEGINNINGWITHLOWESTmOOR#LOSEVENTWHEN
water squirts out. Repeat with remaining vents.
4. Open
AUTOMATICAIRVENT (diaphragm-type or bladder-type expansion
tank systems only) one turn.
5. Open other vents:
a. Starting on the lowest floor, open air vents one at a time until water
squirts out.
b. Repeat with remaining vents.
6. Refill to correct pressure.
Start-up — preparation (continued)6a
Inspect system water piping
After filling the boiler and system with water, INSPECTALL
PIPING
throughout the system for leaks. If found, repair
immediately. Repeat this inspection after the boiler has
been started and the system has heated up.
,EAKSMUSTBEREPAIREDATONCE
Failure to do so can damage the
boiler, resulting in substantial prop-
erty damage.
$ONOTUSE PETROLEUMBASED
CLEANINGORSEALINGCOMPOUNDS
in boiler system. Severe damage to
boiler will occur, resulting in sub-
stantial property damage.
Inspect base insulation
The boiler contains ceramic fiber
and fiberglass materials. Use care
when handling these materials per
instructions on
PAGE of this
manual. Failure to comply could
result in severe personal injury.
&AILURETOREPLACE damaged insu-
lation or reposition insulation can
result in a fire hazard, causing severe
personal injury, death or substantial
property damage.
#HECKTOMAKESURE
BASEINSULATIONISSECUREagainst
all four sides of the base. If insulation is damaged or
displaced,
DONOT operate boiler. Replace or reposition
insulation.
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