35
Start-Up Procedures
SECTION IX - Start-Up Procedures
Final Checks Before Start-up
c
Verify the MODULATING DELTA and
the primary and domestic systems are
full of water and all system components
are correctly set for operation.
c
Verify Start-up Preparation items outlined
on pages 32 thru 34 have been completed.
c
Verify all electrical connections are
correct and securely fasten.
c
Inspect vent piping and combustion air
inlet piping for signs of deterioration from
corrosion, physical damage or sagging.
Verify combustion air piping and vent pip-
ing are intact and correctly installed. See
appropriate venting guide.
c
Verify Burner Configuration - Propane
Only.
Check for proper labeling on the gas
valve and the rating label for propane
configuration.
If there is doubt on the burner configura-
tion, remove the gas valve and check for
proper propane orifice. See Fig.12 and
Table 2 on page 24. Refer to Propane
Conversion Instructions for additional
information on assembly of the gas valve.
Appliance Start-up
1. Turn the ON-OFF switch located on the front
jacket panel to the OFF position. Turn the
electrical supply or any external service
switch to the appliance in the ON position.
2. Read and follow the Operating Instructions
outlined on page 37 to start the appliance.
If Appliance Does Not Start Correctly
1. Verify CH (parameter 2) and DHW (para-
meter 3) Systems are turned ON or set to
“01”. Read the Boiler Display Parameter
Section of the manual on page 42 for more
information.
2. Check for loose electrical connections,
blown fuse (external or internal to the
MCBA Control) or open service switch.
3. Is the gas supply valve open at the appli-
ance and meter?
4. Is incoming gas supply pressure more than
5”w.c. for natural or propane with all gas
appliances operating and less than 13” w.c.
with all gas appliance turned off.
5. Are the heating thermostats set below room
temperature?
If none of these conditions correct the problem,
refer to the MODULATING DELTA Trouble-
shooting guide.
Check the Appliance and System
c
Check Domestic Piping.
Check domestic piping and system
components for leaks. If found, shut
down the appliance and repair immedi-
ately.
c
Check Primary Piping.
Check primary system piping and com-
ponents for leaks. If found, shut down
the appliance and repair immediately.
Purge any remaining air from the system
piping. Air in the system piping will
interfere with circulation creating heat
distribution problems and system noise.
c
Check Vent Piping and Combustion Air
Piping.
Check for gas-tight seal at every con-
nection and seam of the venting and
combustion air inlet.
Venting system must be sealed gas-tight
to prevent flue gas spillage and potential
carbon monoxide emissions, which will
result in severe personal injury or death.
WARNING
