Munchkin 399M - Manual (Page 14)

14
VENTING
F. HEATER REMOVAL FROM A COMMON VENT SYSTEM
At the time of removal of an existing heater, the following steps shall be followed with each appli-
ance remaining connected to the common venting system placed in operation, while the other appli-
ances remaining connected to common venting system are not operating.
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 all doors between the space in which the
appliance remains connected to the common venting system located 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 common venting
system properly vents when tested as outlined, return doors, windows, exhaust fans, fire-
place dampers and any other gas burning appliance to their previous condition of use.
7. Any improper operation of the common venting system should be corrected so the installa-
tion conforms with the National Fuel Gas Code, ANSI Z223.1. When resizing any portion of
the common venting system, the common venting system should be resized to approach the
minimum size as determined using the appropriate tables in Appendix G in the National Fuel
Gas Code , ANSI Z 223.1
DANGER
The Munchkin is not intended to be common vented with any other
existing appliance!
5. Horizontal lengths of exhaust vent must slope
back towards the boiler not less than ¼" per
foot to allow condensate to drain from the
vent pipe. If the vent pipe must be piped
around an obstacle that causes a low point in
the pipe, a drain pipe must be connected to
allow condensate to drain.
6. All piping must be fully supported. Use pipe
hangers at a minimum of 4 foot intervals to
prevent sagging of the pipe where conden-
sate may form.
7. Do not use the boiler to support any piping.
8. A screened straight coupling is provided with
the boiler for use as an outside exhaust termi-
nation.
9. A screened inlet air tee is provided with the
boiler to be used as an outside intake termi-
nation.
10. The following is an optional intake air/exhaust
vent termination available from Heat Transfer
Products, Inc. for the 399M: 4” Stainless Steel
Vent Termination Kit – V2000.
WARNING
All joints of positive pressure vent systems must be
sealed completely to prevent leakage of flue
products into the living space.