Flushing And Filling; Water Quality; Burner And Ignition System; Inspection - Patterson-Kelley MOD-04 Installation And Owner's Manual

®
Modu-Fire Gas-Fired Boiler
WARNING!
Never install a valve that can isolate the low water
cutoff from the boiler.
Drain Valve and Piping
The boiler is not provided with external drain con-
nections. A drain valve should be installed near the
inlet (system return) connection to the boiler and
piped to a suitable floor drain. The boiler can be
completely drained through the bottom header by
removing the flush plug in the bottom end plate.
This plug may also be used to flush accumulated
sediment from the bottom of the boiler.

3.8.4 Flushing and Filling

Flushing the System
Before filling the boiler, flush the system to remove
the debris. Clean and flush old piping thoroughly
before installing the boiler as recommended by your
water conditioning or chemical treatment supplier.
Under no circumstances should the hydronic system
be flushed while the boiler is attached to the system
since the debris or corrosion products could accu-
mulate in the boiler and plug the boiler heat ex-
changer.
If the piping system attached to this unit will be
chemically cleaned, the boiler must be disconnected
from the system and a bypass installed so that the
chemical cleaning solution does not circulate
through the boiler.
Filling
To be sure that the boiler is not air-bound, open the
pressure-relief valve located at the rear of the boiler.
Leave the relief valve open until a steady flow of
water is observed. Close the valve and finish filling
the system.

3.8.5 Water Quality

The boiler is designed to operate in a closed-loop
system. As such, the system should be tight and not
require make-up water. A high percentage of un-
treated make-up water can cause premature failure
due to buildup of scale. Such failure is not covered
by warranty.
Scale can also reduce efficiency. For example, a
scale thickness of 1/16" will result in a 12.5% loss
of efficiency.
The water quality should be within the guidelines
established by the American Boiler Manufacturers
Association, as follows:
•
Total solids:
•
Total alkalinity:
•
Total hardness:
The amount of oils, fats, grease, and other organic
matter should be limited to 10 ppm.
Consult your water conditioning or chemical treat-
ment supplier for analysis and recommendations.
If antifreeze is to be used in the system, the cus-
tomer should perform a hazard analysis to determine
the use and disposal of the antifreeze.
3.9 B
URNER AND

3.9.1 Inspection

Inspect the burners to be sure nothing was damaged
or knocked loose during shipment. Make sure that
the mixer core in the top of the burner is centered in
the burner head; (see burner photo in section on
"Cleaning the Burner" Section 5.2). Inspect the pi-
lot line, main gas train and ignition electrode to be
sure they were not damaged during shipment or in-
stallation. Check to see that the pilot is securely
attached and that it is properly positioned to ignite
the main burner.
3.10 P -S
RE TART
Before attempting to start the boiler, make sure the
following items have been completed.
1. Flue gas from the boiler is properly vented.
13
Installation
2,500 ppm
500 ppm
150 ppm
I S
GNITION YSTEM
C L
HECK IST