Installation

Figure 49 - Drain length
Drain tubing
(by others)
Drain
Drain length
Trap height equal to max
appliance outlet pressure
Figure 50 - Relief Valve installation
Flue direction
Tee 45 RV (T45RV)
Anchor plate (AP)
in frame by others
ANSI Female Flange adaptor (FFA)
Relief valve
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
20
DRAIN LENGTH
Drain Length (DL)
1. Used to drain rain or condensate from the chimney.
2. The chimney flue is equipped with an annular catch ring and a 1” NPT
nipple extending through the outer casing for attachment of drain
tubing.
3. The drain tubing should include a water trap of a height at least equal
to the maximum expected operating pressure at the appliance outlet
to avoid allowing flue gases to vent through the drain. See Figure 49.
4. Drain length should be installed indoors to prevent freezing.
RELIEF VALVE (DIS ONLY)
Relief Valve (RV)
1. The relief valve is intended for use with diesel engines to provide extra
protection to the chimney in case of a delayed ignition of backfire.
2. The connection of the Relief valve and the DIS chimney is done with
the use of the ANSI Female Flange Adaptor (FFA).
3. The valve is factory calibrated to open at 27 in. wc.
4. The relief valve must be supported independently of the rest of the
exhaust system. The best way to accomplish this is to locate an
Anchor Plate (AP) support at the joint between the ANSI Flange
adaptor and the adjacent fitting. See Figure 50.
5. It is crucial that the support be properly secured to building structure
so that it can withstand the forces generated in case of delayed fuel
ignition.
6. It must be installed in combination with a Tee 45° Relief Valve (T45RV).
Figure 47 - Flip Top (FT)
Figure 48 - Miter Cut Termination (MC)
Flip top
Bird screen
Figure 46 - Finishing Cone (FC)
Better draft