Freestyle 80 - Page 49

Part number 550-142-850/0716
49
FreeStyle
®
WALL MOUNT GAS-FIRED WATER BOILER — Boiler Manual
'AS2ATE.ATURAL'AS
!FTERMINUTESFROMCOLD
Combi
Boiler
model
Maximum rate Minimum rate
ft
3
/h ft
3
/h
&3
 
&3
 
&3
 
Table 2 'ASRATEFOR#OMBIAND(EATING/NLYBOILERS
For natural gas or liquefied petroleum (propane) gas, the pres-
SUR
EREQUIREDATGASVALVEINLETPRESSUREPORTVERIFYMINIMUM
gas pressure when all gas appliances are in operation):
a. -AXIMUMvWCWITHNOmOWLOCKUPORWITHBOILER
on.
b. -INIMUMGASPRESSUREWITHGASmOWINGVERIFYDURING
boiler startup, while boiler is at high fire)
— FreeStyle® 80: 3.5” w.c.;
— FreeStyle® 120: 3.5” w.c.;
— FreeStyle® 155: 3.5” w.c.
c. Nominal gas pressure: 11.0” w.c.
4. Install 100% lockup gas pressure regulator in supply
LINEIF INLET PRESSURECAN EXCEED v WC ATANYTIME
!DJUSTLOCKUPREGULATORFORvWCMAXIMUM
20 Gas piping (continued)
#HECKGASPRESSUREATINLETTOBOILER
1. See Figure 58FORLOCATIONOFTHEGASINLETPRESSURETESTPORT
#HECKTHEOPERATIONALWORKINGGASINLET
PRESSURE
1. Set up the boiler to operate at maximum rate as described in
section “ Test mode” Figure 95, page 70.
2. With the boiler operating at maximum rate check that the op-
erational (working) gas pressure at the inlet gas pressure test
PORTSEEABOVECOMPLIESWITHTHEREQUIREMENTSOF4ABLE
3. Ensure that this inlet pressure can be obtained with all other
gas appliances in the property working.
Measure the gas rate
-EASURETHEGASRATEANDCHECKAGAINSTFOLLOWING4ABLE
Figure 58 )NLETTESTPORTONGASVALVE
)NLETTESTPORT