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

Page 17
Image 17
Pentair Hot Tub manual Stack Type Indoor Draft Hood KIT, Indoor Draft Hood Installation

Hot Tub specifications

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