LP-446-r4 Rev. 10.12.16
13
When removing an existing boiler, follow the steps below.
1. Seal any unused openings in the common venting system.
2. Visually inspect the venting system for proper size and
horizontal pitch to determine if there is blockage, leakage,
corrosion, or other deficiencies that could cause an unsafe
condition.
3. If practical, close all building doors, windows, and doors
between the space in which the boiler remains connected to
the common venting system and other spaces in the building.
Turn on clothes dryers and any appliances not connected to
the common venting system. Turn on any exhaust fans, such
as range hoods and bathroom exhausts, at maximum speed.
Do not operate a summer exhaust fan. Close all fireplace
dampers.
4. Place in operation the appliance being inspected. Follow the
lighting instructions. Adjust the thermostat so the appliance
will operate continuously.
5. Test for spillage at the draft hood relief opening after 5
minutes of main burner operation. Use the flame of a match
or candle or smoke from a cigarette.
6. After it has been determined that each appliance remaining
connected to the common venting system properly vents
when tested as outlined, return doors, windows, exhaust fans,
fireplace dampers, and any other gas burning appliances to
their previous condition of use.
7. Any improper operation of the common venting system
should be corrected to conform to the National Fuel Gas
Code, ANSI Z223.1. When resizing any portion of the common
venting system, the system should approach the minimum
size as determined using the appropriate tables in Appendix
G of ANSI Z223.1.
Figure 4 - CO Warning Label
I. Water Chemistry Requirements*
Chemical imbalance of the water supply may affect efficiency and
cause severe damage to the boiler and associated equipment.
HTP recommends having water quality professionally analyzed
to determine whether it is necessary to install a water softener.
It is important that the water chemistry on both the domestic
hot water and central heating sides are checked before
installing the boiler, as water quality will affect the reliability of
the system. In addition, operating temperatures above 140
o
F
will cause the boiler to operate continuously, accelerating the
build-up of lime scale and possibly shortening the service life of
the boiler. Failure of a boiler due to lime scale build-up, low pH,
or other chemical imbalance IS NOT covered by the warranty.
•
Sodium less than 20 mGL
•
Water pH between 6.0 and 8.0
•
Maintain water pH between 6.0 and 8.0. Check with
litmus paper or have it chemically analyzed by water
treatment company.
•
If the pH differs from above, consult local water
treatment for treatment needed.
•
Hardness less than 7 grains
•
Consult local water treatment companies for unusually
hard water areas (above 7 grains hardness).
•
Chlorine concentration less than 100 ppm
•
Using chlorinated fresh water should be acceptable as
levels are typically less than 5 ppm.
•
Do not connect the boiler to directly heat swimming
pool or spa water.
•
Do not fill boiler or operate with water containing
chlorine in excess of 100 ppm.
*NOTE:
It is recommended to clean the heat exchanger at
least once a year to prevent lime scale buildup. To clean the
heat exchanger, follow the maintenance procedure in this
manual.
Hardness:
Less than 7 grains
Chloride levels:
Less than 100 ppm
pH levels:
6 - 8
TDS:
Less than 2000 ppm
Sodium:
Less than 20 mGL
Summary of Contents for MODCON500
Page 35: ...LP 446 r4 Rev 10 12 16 35 Figure 29 Cascade Master and FollowerWiring...
Page 57: ...LP 446 r4 Rev 10 12 16 57 Figure 35 500 Model Combustion System Replacement Parts...
Page 58: ...LP 446 r4 Rev 10 12 16 58 Figure 36 700 850 Models Combustion System Replacement Parts...
Page 60: ...LP 446 r4 Rev 10 12 16 60 Figure 38 Cabinet Replacement Parts All Models...
