Centurion Water Heater- Edge [ii]: Install-Operation-Service
SECTION 2: INSTALLATION
OMM-0153_A
• 8/25/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 31 of 131
2.11 FLUE GAS VENT INSTALLATION
PVI
’s
CENTURION Venting and Combustion Air Design Guide
should
be consulted before any
flue or combustion air venting is designed or installed. Suitable, U/L approved, positive
pressure, watertight vent materials MUST be used for safety and UL certification.
Once you have selected the vent material, enter that material in the Edge Controller:
1. Go to:
Main Menu
→
Advanced Setup
→
Unit
→
Unit Settings.
Figure 2-16: Unit Settings Screen
2. Find the
Vent Type
parameter.
3. Set the value of this parameter to match your vent material: PVC, CPVC, Polypro or
Stainless Steel. This sets the exhaust temperature limits. Note, PVC is not allowed in the
state of Massachusetts.
Because the unit is capable of discharging low temperature exhaust gases,
the flue must be
pitched back towards the unit a minimum of 1/4" per foot (0.64 cm per 0.3 m)
to avoid any
condensate pooling and to allow for proper drainage.
While there is a positive flue pressure during operation, the combined pressure drop of vent and
combustion air systems
must not exceed 140 equivalent feet (42.7
m) or 0.8” W.C. (199 Pa)
.
Fittings as well as pipe lengths must be calculated as part of the equivalent length. For a natural
draft installation,
the draft
must not exceed -
0.25” W.C. (-62 Pa)
. These factors must be
planned into the vent installation. If the maximum allowable equivalent lengths of piping are
exceeded, the unit will not operate properly or reliably.
2.11.1 Massachusetts Installations
For Massachusetts installations, the following companies provide vent systems that conform to
all applicable requirements for installations within the Commonwealth of Massachusetts:
Selkirk Corporation - Heatfab Division
130 Industrial Blvd.
Turners Falls, MA 01376
Phone: 1-800-772-0739
Watertown Supply
33 Grove St.
Watertown, MA 02472
Phone: (617) 924-2840
Glover Sheet Metal, Inc.
44 Riverdale Ave.
Newton, MA 02485
Phone: (617) 527-8178
Emerson Swan Co
300 Pond St.
Randolph, MA 02368
Phone 781-986-2555