Roberts Gorden CGTH-50, CGTH-30, CGTH-40 service manual Elbow Assembly

SECTION 5: VENTING INSTALLATION

9.Attach 3" (80 mm) elbow portion of 90° elbow kit to the 3" (80 mm) flue pipe (length 'A'). Use high temperature silicone sealant and 3 sheetmetal screws. (See Figure 21)

FIGURE 21: Elbow Assembly

High

Temperature

Silicone

Spring

3x Self

Drill Screws

10.Completely assemble the 3” (80 mm) vent lengths A, B and elbow and attach to the heater. Put the vent collar on the 3” (80 mm) vent. All joints must be sealed with high temperature sealant and sheet metal screws. (See Figure 22)

FIGURE 22: Elbow Assembly for Vent Collar

	3x Self Drill Screws and
	High Temperature Silicone
	Stainless	5” (125 mm)
Heater	Steel Tab
		Elbow
	on
	Turbulator
		Spring
5” (125 mm) Vent Collar

11.Attach the vent collar to the heater. Hold the 5” (125 mm) vent material up to the 3" (80 mm) vent and mark the required length. Note the length must be sufficient for a minimum of 1 1/2” (38 mm) overlap at both ends. Cut the vent to length from the non crimped end. Wrap the 3” (80 mm) tube with the 5” (125 mm) vent and snap the vent together. Attach the 5” (125 mm) vent at both ends. All joints must be sealed with high tempera- ture sealant and sheet metal screws. (See Figure 23)

FIGURE 23: Vent Collar and 5" Vent Attachment

1 1/2” Min. (38 mm)		1 1/2” Min.
		(38 mm)
	3” (80 mm)

			3x Sheetmetal Screws and
	5” (125 mm)		High Temperature Sealant
1 1/2” Min. (38 mm)		1 1/2” Min. (38 mm)

12.Insert vent terminal and repeat step 11 for 5” (125 mm) from the elbow through the wall. Secure the vent terminal to the exterior surface of the wall.

NOTE: If the protruding 3" (80 mm) flue pipe is directly below and within 24" (610 mm) of the building soffit, the optional vent extension should be used and secured with three sheet- metal screws.

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