Product Overview

41
103859-12 - 8/19
MPO-IQ
Installation & Service Manual
A. ALWAYS INSPECT INSTALLATION BEFORE
STARTING BURNER.
1. Verify that the venting system is properly installed
and free of obstructions prior to start-up of the boiler.
Refer to Section IV "Natural Draft Venting" or Section
VI "Direct Venting / Air Intake Piping" in this manual.
2. Inspect electrical system to ensure proper electrical
connections are made and fuses are installed. Refer
to Section VI "Electrical" in this manual.
3. Verify that the oil piping is properly installed, the
oil tank is filled with #2 fuel oil and oil lines have
been tested. Refer to Section VII "Oil Piping" in this
manual.
4. Confirm all electrical and oil supplies are turned off
at the source.
WARNING
Completely read, understand and follow all
instructions in this manual before attempting start
up.
B
. FILL HEATING SYSTEM WITH WATER.
NOTICE It is important to properly remove the oil
and dirt from the system. Failure to clean the system
can result in clogged air vents, circulator damage
and seized zone valves. Refer to Maintenance and
Service Instructions Section of this manual for proper
cleaning instructions.
CLEAN HEATING SYSTEM if boiler water is dirty.
1. HOT WATER BOILERS. Fill entire heating system
with water and vent air from system. Use the following
procedure on a series loop or multi-zoned system
installed as per Figures 10 and 11, to remove air
from system when filling:
a. Close full port ball valve in boiler system piping.
b. Isolate all zones by closing zone valves or shut-
off valves in supply and return of each zone(s).
c. Attach a hose to vertical purge valve in boiler
system supply piping up stream from the full port
ball valve.
(Note - Terminate hose in five gallon bucket at a
suitable floor drain or outdoor area).
d. Starting with one zone at a time, open zone valve
or shut-off valve in boiler supply and return piping.
e. Open purge valve.
f. Open shut-off valve in cold water supply piping
located between the air scoop and expansion
tank.
g. Allow water to overflow from bucket until discharge
from hose is bubble free for 30 seconds.
h. When zone valve is completely purged of air,
close zone valve or shut-off valve. Open zone
valve to the next zone to be purged. Repeat
this step until all zones have been purged. At
completion, open all zone valves.
i. Close purge valve, continue filling the system
until the pressure gauge reads 12 psi. Close
shut-off valve in cold water supply piping.
WARNING
The maximum operating pressure of this boiler is
posted on the ASME Data Label located on the
top of the boiler. Never exceed this pressure. Do
not plug relief valve.
NOTICE If make-up water line is equipped with
pressure reducing valve, system will automatically
fill to 12 psi. Follow fill valve manufacturer's
instructions.
j. Open full port ball valve in boiler system piping.
k. Remove hose from purge valve.
l. Confirm that the boiler and system have no water
leaks.
m. It may be necessary to clean the air vent assembly
after a few days of operation.
C. CHECK OIL BURNER BEFORE STARTING.
1. Ensure that burner is tightly secured to the burner
swing door creating an airtight seal.
2. CHECK BURNER AIR AND HEAD SETTINGS,
readjust if necessary, see Table 15A thru 15C
and 16 at rear of manual. Refer to Burner
Manufacturer's Manual.
3. Adjust system thermostat(s) to highest setting.
D. START OIL BURNER.
1. Open oil supply to burner and vent fitting on fuel
pump.
2. Turn 'On' electrical service switch to boiler.
3. Press "I" Button on front of Primary Control, hold
for ten (10) seconds and release to reset Primary
Control.
8 System Start-Up
!
!
WARNING
All boilers equipped with burner swing door have a potential hazard which can cause severe property
damage, personal injury or loss of life if ignored. Before opening swing door, turn off service switch to boiler
to prevent accidental firing of burner outside the combustion chamber. Be sure to tighten swing door fastener
completely when service is completed. In addition, the burner power cord will have to be disconnected from
the receptacle in the front jacket.
!