Chromalox PF455-3 manual Mounting Procedure - DHIF

MOUNTING

Mounting Procedure — DHIF	Double
(Flanged heaters with control box)
1. At heater location, cut out a section of duct, or a new con-	Lip	Self-Adhesive Gasket
	3/4"
struction lay out duct work to accommodate dimensions of		Supplied with Heater and
		Installed by Customer
heater.	3/4"	Duct
2. Form mounting flanges on cut edges of duct as shown in
Figure 17. Omit flange in side when terminal box overhangs.				D
3. Position heater in duct and attach duct lip to heater flanges with
sheet metal screws.	Control
4. Attach control box to duct with sheet metal screws through the				W
mounting holes provided inside the control box.	Box
	Sheet Metal
NOTE: Where necessary, make provision to support weight of				Sheet Metal
	Screws	H	H
heater. Any part of heater flange may be drilled for attaching hang-				Screws
er straps or duct.
5. Where necessary, joint between duct and heater flange may be	Mounting
sealed with silicone gaskets or silicone sealant.		W
	Holes
		Figure 17
Mounting Procedure DHII	3/4"		Self-Adhesive Gasket
(Insert heaters with control box)		Double	Supplied with Heater and
1. Measure dimension “H” of duct heater (Figure 1) and mark the			Installed by Customer
		Lip
duct with an outline for a rectangular hole with dimensions of			Duct
D-11/2”. The D-11/2” dimension is to be parallel to the direction
of air flow.
2. Increase D-11/2” slot to D by forming a 3/4” double lip on both				D
sides of the duct opening. (See Figure 18).
	Control			W
3. Slide heater into duct.
4. Attach control box to duct with sheet metal screws through the	Box
	Sheet Metal
mounting holes provided inside the control box and through
	Screws			H
the brackets on the top and bottom of heater.				H
5. Where necessary, make provision to support weight of heater
and terminal box.	Mounting
			W
	Holes
		Figure 18
Mounting Procedure — DHRF		Self-Adhesive Gasket
(Flanged heaters with compact terminal box)		Supplied with Heater and
		Installed by Customer

1.At heater location, cut out a section of duct, or on new con-

struction lay out duct work to accommodate dimensions of		D
heater.	Double
2. Form mounting flanges on cut edges of duct as shown in	Lip	3/4"
Figure 19.		W
3. Position heater in duct and attach duct lip to heater flanges with
sheet metal screws.		3/4"
NOTE: Where necessary, make provision to support weight of
heater. Any part of heater flange may be drilled for attaching hang-		H
er straps or duct.
4. Attach control box to duct with sheet metal screws through the		Duct
mounting holes provided inside the control box.

5.Where necessary, joint between duct and heater flange may be sealed with silicone gasket or sealant.

				Figure 19
Mounting Procedure — DHRI						Self-Adhesive Gasket
(Insert heaters with compact terminal box)			Double			Supplied with Heater and
						Installed by Customer
1.	Measure dimension “H” of duct heater (Figure 2) and mark the		Lip
	duct with an outline for a rectangular hole with dimensions of
	D-11/2” x “H”. The D-11/2” dimension is to be parallel to the	3/4"
	direction of air flow.						W
2.	Increase D-11/2” slot to “D” by forming a 3/4” double lip on each
	side of the duct. (See Figure 19).
3.	Slide heater into duct.
4.	Attach control box to duct with sheet metal screws through the					H
	mounting holes provided inside the control box and through		Duct
	the brackets on the top and bottom of heater.
5.	Where necessary, make provision to support weight of heater.				D
				Figure 20
		-5-