Pentair Hot Tub manual Stack Type Indoor Draft Hood Kit, Indoor Draft Hood Installation

Installation (contd.) 16

NOTE

The heater requires two uninterrupted air supply openings; one for ventilation and one to supply oxygen for proper gas combustion. The air supply openings should be sized according to Tables 12. and 13.

Air supply requirements below apply to all

MiniMax® heaters

All opening sizes are minimum and unobstructed.

	All Air From Inside
Model	Air for Combustion	Air Ventilation
	Sq. In.	Sq. In.

BASE FOR USE ON COMBUSTIBLE FLOORS

SHEET

METAL

BLOCKS

Figure 17.

T

O

H

.
Min
6"
	.
	in
"	M
6

HOLLOW MASONARY BLOCKS, NOT LESS THAN

4" THICK (LAID WITH ENDS UNSEALED AND JOINTS MATCHED FOR AIR CIRCULATION). COVER BLOCKS WITH 24 GA. (MIN.) GALVANIZED SHEET METAL.

150		150	150
200		200	200
250		250	250
300		300	300
350		350	350
400		400	400
Table 12.
		All Air From Outside
	Model	Air for Combustion	Air Ventilation
		Sq. In.	Sq. In.
	150	37	37
	200	50	50
	250	63	63
	300	77	77
	350	90	90
	400	100	100
Table 13.

CAUTION

Chemicals should not be stored near the heater installation. Combustion air can be contaminated by corrosive chemical fumes which can void the warranty.

STACK TYPE INDOOR DRAFT HOOD KIT

The proper draft hood and adapter must be installed on the heater as shown below:

Model	Draft Hood	Product No.	Vent Dia.
150	DH15	460227	6 in.
200	DH20	460228	7 in.
250	DH25	460230	7 in.
300	DH30	460231	8 in.
350	DH35	460233	9 in.
400	DH40	460234	10 in.

Table 14.

INDOOR DRAFT HOOD INSTALLATION

1.Take out the louvered outer top piece after first removing the sheet metal screws, attaching it to the cabinet.

INSTALLATION ON FLOORS CONSTRUCTED OF COMBUSTIBLE MATERIALS

The heater may be placed on a “combustible floor” using either of the two methods listed below:

a)Use a Non-combustible Base Kit for use on combustible floors.

b)Construct a non-combustible base from masonry blocks as illustrated, see Figure 17.

2.Install the adaptor (vent kit).

3.Install the top cover (vent kit).

4.Install the draft hood (vent kit).

Use the provided screws to secure the vent assembly.

Draft Hood

Top Cover

Adaptor

Screw

(2 PLC's)

HEATER

Figure 18.

P/N 472128

Rev. E 11-5-07