Laars MASCOT HT 330 Manual de usuario

MASCOT

Quick Setup

Guide

Output btu

126,376

167,262

241,600

3/4" 1" 1"

3/4" 3/4" 3/4"

1" 1" 1-1/4"

3/4" 3/4" 1"

1" 1-1/4 1-1/4

1" 1" 1"

1-1/4 1-1/4 1-1/2"

1" 1" 1-1/4"

1-1/2" 1-1/2" 1-1/2"

1-1/4" 1-1/4 1-1/4

1-1/2" 1-1/2" 1-1/2"

1-1/4" 1-1/4 1-1/4

1-1/2" 2" 2"

1-1/4" 1-1/2" 1-1/2"

501 BTUH LPG

(3-HT 1.45)

726 BTUH NG

(3-HT 1.65)

726 BTUH LPG

(3-HT 1.65)

334 BTUH LPG

(2-HT 1.45)

484 BTUH NG

(2-HT 1.65)

484 BTUH LPG

(2-HT 1.65)

501 BTUH NG

(3-HT 1.45)

167 BTUH LPG

(HT 1.45)

242 BTUH NG

(HT 1.65)

242 BTUH LPG

(HT 1.65)

334 BTUH NG

(2-HT 1.45)

Linear Feet Gas Pipe

126 BTUH NG

(single residential)

126 BTUH LPG

(single residential)

167 BTUH NG

(HT 1.45)

BTUH in Thousands 50 ft 75 ft 100 ft

HT 330/1.330

HT 1.450

HT 1.650 1"

3/4"

Minimum Gas Pipe Sizing Guide

For Black Iron pipe

Refer to Sizing charts for a complete system design

Mascot Models

Branch Gas Line

HT 330 VALVE PLACEMENTS

Be sure to use the supplied fiber gaskets

O NOT OVER TIGHTEN FITTINGS!

Boiler Supply

Valve

Increase from

3/4” to 1-1/4”

Condensate

Drain

Increase from

5/8” to 3/4”

Pot. Water Outlet-

No Valve

Increase from 1/2” to 3/4”

Gas Supply

Valve

3/4”

Pot. Water Outlet-

No Valve

Increase from 1/2” to 3/4”

Boiler Return

Valve

w/Screen

Increase from

3/4” to 1-1/4”

T&P Relief

Valve

This valve is

vertical 3/4”

HT 1.330 VALVE PLACEMENTS

Be sure to use the supplied fiber gaskets

O NOT OVER TIGHTEN FITTINGS!

Boiler Supply

Valve

Increase from

3/4” to 1-1/4”

Condensate

Drain

Increase from

5/8” to 3/4”

Gas Supply

Valve

3/4”

Boiler Return

Valve w/Screen

Increase from 3/4” to

1-1/4”

T&P Relief

Valve

This valve is

vertical 3/4”

Water Feed Inlet

Valve

1/2” with check-

valve

Maximum length of 3/4" - 1-1/4" hydronic circuit using a standard circ. Pump is 150ft.

Outdoor reset sensors should ALWAYS be placed in a location outside the structure

that will never "see" sunlight in the heating season.

(typically north side under an eave)

2-1/2"

SAFE RULES TO FOLLOW ON THE JOB

1/2"

3/4"

1-1/4" 320,000

70,000 140,000 280,000 420,000 560,000

40,000 80,000 160,000 240,000

40,000

20,000 40,000 80,000 120,000 160,000

5,000 10,000 20,000 30,000

1,700,000 2,550,000 3,400,000

(remember antifreeze reduces efficiency and may require LARGER pumps)

Maximum concentration of antifreeze in low-mass boilers is 30%

Equiv. Length (100 ft. with Mascot internal pump)

Safely figure 500BTUH per linear foot of most residential baseboard convectors.

Maximum length of residential baseboard per circuit is 40ft.

85 425,000 850,000

Increase the potable water intake & discharge pipe openings from 1/2" to 3/4" will

adequate flow through the Mascot residential boilers.

Increase the boiler intake & discharge pipe opening from 3/4" to 1-1/4" will ensure

1,200,000 1,800,000 2,400,000

ensure adequate flow through the Mascot residential combination boilers.

60 300,000 600,000 780,000 1,170,000 1,560,00039 195,000 390,000 440,000 660,000 880,000110,000 220,000

1-1/2"

Water - BTU formula:

GPM X Temp. Change X 500= BTUH

Maximum Flow

GPM BTUH per 10º F

temp. drop BTUH per 20º F

temp. drop BTUH per 40º F

temp. drop BTUH per 60º F

temp. drop BTUH per 80º F

temp. drop

Size (copper)

Water Pipe Sizing Guide

Refer to Sizing Charts for a complete system design

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