Weil-McLain SVF 1500 Manual page 12

SVF
™
Series 1
Commercial Condensing Gas-Fired Water Boiler — Boiler Manual
Prepare boiler
Prepa re boiler for propane
(when required)
SVF
TM
pane operation — all boilers are shipped
ready for natural gas operation, and must
be fi tted with a propane orifi ce to be used
on propane.
High altitude installations
The standard propane orifice is required for
high-altitude installations. Th e Control automati-
cally adjusts boiler operation for altitude when set
properly. Select "
High Altitude
Verify orifi ce size
Verify when installing the propane orifi ce that the
orifi ce size marking matches boiler size. See below.
boiler for propane
For a boiler already installed, you must turn off gas
supply, turn off power and allow boiler to cool. Follow
the Natural gas to LP conversion procedure below.
You must completely test the boiler aft er conversion
to verify performance. Start up the boiler following
instructions in this manual and the start-up procedure
to check combustion levels.
tial property damage.
Propane conversion procedure
trical supply to the boiler and close the external manual
gas shut-off valve to isolate the boiler during conversion.
Allow the boiler to cool if it has been operating. Following
conversion of an installed boiler, follow all instructions
in this manual to start up the boiler and verify operation
of the boiler and all system components.
Natural gas Conversion to Propane
1. Locate propane orifi ce disk from conversion kit bag shipped with
boiler in the envelope assembly.
2. Verify that the stamping on the orifi ce disk is correct for model size:
a. One orifi ce for SVF 1500/2000/2500/3000
b. Orifi ce size = 0.660".
3. Remove left front side panel, lift up and out.
4. Remove the gas manifold, between gas valve and mixing system.
a. Remove the four (4) M5 bolts att aching the manifold to the
mixing system/blower with a 7mm Allen wrench.
b. Remove the four (4) M8 bolts att aching the manifold to the gas
valve with a 13mm socket or wrench.
5. Inspect the gas valve O-ring. If damaged, replace with new.
6. Inspect the mixing system/blower O-ring. If damaged, replace with
new.
7. Install Propane orifi ce in groove.
12
(continued)
" in the Control setup for the
option (see Figure 67, page 75 ).
— You must turn off elec-
Figure 6
Propane orifi ce location
8. Reinstall the ball valve manifold.
a. Ensure the gas valve and blower O-rings are in place!
b. Install the four (4) M5 att aching the manifold to the
mixing system/blower with a 7mm Allen wrench.
c. Install the four (4) M8 bolts att aching the manifold to
the gas valve with a 13mm socket or wrench.
9. Ensure fl anges are fl at to mounting surfaces and seals with no gaps.
10. Reconnect power.
11. Change control to LP sett ings in either the Wizard or in the boiler
sett ings menu.
12. Start up, test, and adjust boiler as stated on page 88 , Chec k fl ame
& combustion adjustments.
13. Apply conversion label next to rating label.
Boiler relief valve and P/T gauge
lowable relief valve sett ing for the SVF
boiler is shipped with a 30 PSIG relief valve. See Re-
placement parts in the back of this manual for alternate
pressure sett ing relief valves.
Th e boiler is shipped with a ¼" NPT pressure and
temperature gauge which has a pressure range up to
75 psig. Th is gauge meets ASME requirements up to a
relief valve sett ing of 50 psig. For higher pressure rated
relief valves, a diff erent pressure and temperature gauge
with a higher pressure range is required. When install-
ing a gauge that requires a larger tapping than the ¼"
NPT tapping in the boiler supply manifold, provide an
additional tapping in the near boiler piping BEFORE
any isolation valve.
Perform hydrostatic pressure test
Pressure test boiler before permanently att aching water or gas piping
or electrical supply.
TM
Each SVF
boiler is factory tested to 1½ times maxi-
mum allowable working pressure per ASME Section IV
requirements.
A pressure test should be performed on site to 1½ times
the pressure sett ing of the relief valve to be installed on
the unit (45 psig for a 30-psig relief valve; 75 psig for
a 50-psig relief valve; or 150 psig for a 100-psig relief
valve; or 240 psig for a 160-psig relief valve).
. Th is is the maximum al-
TM
boiler. Th e
Part number 550-100-250/0819