MRCOOL MGM95SE045B3XA Installation guide

The Signature Series is NOT designed for amateur installation. Installation SHOULD be performed by an authorized technician.

Please read this manual carefully before installation and keep it for future reference.

The Signature Series is NOT designed for amateur installation. Installation SHOULD be performed by an authorized technician.

Please read this manual carefully before installation and keep it for future reference.

Owner & Installation

Manual

MGM*95SE*XA Gas Furnace

Signature Series

507276-05C Page 1 of 57mrcool.com

INSTALLATION INSTRUCTIONS

MGM*95SE*XA

Warm Air Gas Furnace

Save these instructions for future reference

(P) 507276-05C

MRCOOL, LLC

This manual must be left with the homeowner for future reference.

WARNING

CAUTION

Table of Contents

2

3

Gas Furnace

6

9

13

16

Gas Piping 38

50

52

55

56

*F507276-C*

507276-05CPage 2 of 57 mrcool.com

1

NOTE - C*5 5

R Air B

2

FRONT VIEW SIDE VIEW

Unit Dimensions

Model

A B C D

in. mm in. mm in. mm in. mm

070-3

16

110-5

21 533

505 238

135-5

622 23 283

507276-05C Page 3 of 57mrcool.com

Figure 1.

Parts Arrangement

507276-05Cmrcool.com

Gas Furnace

NOTE: In Direct Vent installations, combustion air is taken

Non-Direct Vent installations, combustion air is taken from

Figure 2.

Figure 3.

Shipping and Packing List

NOTE:

Safety Information

DANGER OF EXPLOSION!

DANGER

Building Codes

MG*95SE*XA

507276-05C Page 5 of 57mrcool.com

Installation Locations

NOTE:

Installed in Combination with a Cooling Coil

Figure 4. Heating Unit Installed Parallel to Air Handler

Unit

NOTE:

Use of Furnace as a Construction Heater

DO NOT USE THE UNIT FOR CONSTRUCTION HEAT

UNLESS ALL OF THE FOLLOWING CRITERIA ARE

MET:

507276-05CPage 6 of 57 mrcool.com

COMPONENT FAILURE AS A RESULT OF FAILURE TO

General

•

NOTE:

•

CAUTION

Combustion, Dilution & Ventilation Air

NOTE: In Non-Direct Vent Installations, combustion air is

507276-05C Page 7 of 57mrcool.com

•

WARNING

CAUTION

Air from Inside

507276-05CPage 8 of 57 mrcool.com

Figure 5.

Inside

Air from Outside

Figure 6.

Outside

(Inlet Air from Crawl Space and Outlet Air to

Ventilated Attic)

Figure 7.

Outside

(All Air through Ventilated Attic)

Figure 8.

Outside

OUTLET AIR

INLET AIR

NOTE−Each air duct opening shall have a free area of at least one

square inch per 2,000 Btu (645mm

2

per .59kW) per hour of the total

input rating of all equipment in the enclosure. If the equipment room

is located against an outside wall and the air openings communi-

cate directly with the outdoors, each opening shall have a free area

of at least 1 square inch per 4,000 Btu (645mm

2

per 1.17kW) per

hour of the total input rating of all other equipment in the enclosure.

ROOF TERMINATED

EXHAUST PIPE

SIDE WALL

TERMINATED

EXHAUST PIPE

(ALTERNATE

LOCATION)

FURNACE

507276-05C Page 9 of 57mrcool.com

WARNING

Ventilation Louvers

Inlet Air

(Minimum 12 in.

(305mm) above

Attic Floor)

Roof Terminated

Exhaust Pipe

Furnace

*Intake Debris

Screen

(Provided)

* See Maximum Vent Lengths table

NOTE

Figure 9.

(Inlet Air from Ventilated Attic and Outlet Air to

Outside)

Roof Terminated

Exhaust Pipe

Furnace

Ventilation

Louvers

(Crawl Space)

*Intake Debris Screen Provided

Inlet Air

Minimum

12 in. (305mm)

above Crawl

Space Floor

Coupling or

3 in. to 2 in.

Transition

(Field Provided)

* See Maximum Vent Lengths table

NOTE

Figure 10.

(Inlet Air from Ventilated Crawl Space and Outlet Air

to Outside)

Shipping Bolt Removal

Figure 11.

Installation

Setting Equipment

WARNING

507276-05CPage 10 of 57 mrcool.com

Figure 12. Setting Equipment

WARNING

Figure 13. Installation Clearances

Top

Bottom (Floor)

Left Side

Right Side

Top/Plenum 1 in. (25 mm)

*Front 0

Back 0

Sides 0†

Vent 0

Floor 0‡

*Front clearance in alcove installation must be 24 in. (610 mm).

Maintain a minimum of 24 in. (610 mm) for front service access.

†Allow proper clearances to accommodate condensate trap.

‡For installations on a combustible

oor, do not install the furnace directly

on carpeting, tile or other combustible materials other than wood

ooring.

0

0†

0

0‡

507276-05C Page 11 of 57mrcool.com

Return Air Guidelines

Figure 14. Side Return Air

(with Transition and Filter)

Figure 15. Optional Return Air Base

507276-05CPage 12 of 57 mrcool.com

Figure 16. Removing the Bottom Panel

Removing the Bottom Panel

Horizontal Applications

WARNING

Figure 17.

Figure 18. Installation Clearances

Horizontal Applications

dnEthgiRdnEtfeL

Right−Hand Discharge

Left−Hand Discharge

Top

Bottom (Floor)**

dnEthgiRdnEtfeL

Air

Flow

Air

Flow

Air

Flow

Air

Flow

Top 0

Front* 0

Back 0

Ends 0

Vent 0

Floor 0‡

* Front clearance in alcove installation must be 24 in. (610 mm).

Maintain a minimum of 24 in. (610 mm) for front service access.

**An 8" service clearance must be maintained below the unit to provide

for servicing of the condensate trap.

‡For installations on a combustible

oor, do not install the furnace directly

on carpeting, tile or other combustible materials other than wood

ooring.

0

0†

0

0‡

Suspended Installation of Horizontal Unit

Figure 19. Typical Horizontal Application

507276-05C Page 13 of 57mrcool.com

NOTE:

Platform Installation of Horizontal Unit

Figure 20.

Return Air - Horizontal Applications

Filters

Furnace Cabinet

Width

Filter Size

Side Return Bottom Return

Table 1.

Duct System

NOTE:

Supply Air Plenum

Return Air Plenum

NOTE:

507276-05Cmrcool.com

CAUTION

MGM95*E

IMPORTANT

Canadian Applications Only

Table 2.

F891

(Pipe)

F628

PRIMER & SOLVENT CEMENT

ASTM

SPECIFICATION

F656

CANADA PIPE & FITTING & SOLVENT

CEMENT

MARKING

ULCS636

POLYPROPYLENE VENTING SYSTEM

ULC-S636

TM

ULC-S636

507276-05C Page 15 of 57mrcool.com

Capacity

VENT

PIPE DIA.

(in.)

STANDARD CONCENTRIC

Outdoor

Exhaust

Accelerator

(Dia. X Length)

Outdoor

Exhaust

Accelerator

(Dia. X Length)

Flush Mount

Kit

Concentric Kit Kit Kit

51W11**

71M80

OR

+44W92++

69M29

OR

+44W92++

60L46

OR

44W93+

2

3

070

2

3

090

2

3

110

2

3

135 3

Table 3. Outdoor Termination Kits Usage

Joint Cementing Procedure

NOTE:

DANGER OF EXPLOSION!

DANGER

NOTE:

507276-05CPage 16 of 57 mrcool.com

NOTE:

Venting Practices

Figure 21.

Removal of the Furnace from Common Vent

CARBON MONOXIDE POISONING HAZARD

WARNING

507276-05C Page 17 of 57mrcool.com

Figure 22.

CHIMNEY

OR GAS

VENT

(Check sizing

for remaining

appliance)

FURNACE

(Removed from

from common

vent system)

WATER

HEATER

OPENINGS

(To Adjacent

Room)

If this gas furnace replaces a furnace which

was commonly vented with another gas appliance,

the size of the existing vent pipe for that gas

appliance must be checked. Without the heat of the

original furnace flue products, the existing vent pipe

is probably oversized for the single water heater or

other appliance. The vent should be checked for

proper draw with the remaining appliance.

REPLACING FURNACE THAT

WAS PART OF A COMMON

VENT SYSTEM

Exhaust Piping

CAUTION

Vent Piping Guidelines

NOTE: In non-Direct Vent installations, combustion air is

In Direct Vent installations, combustion air is taken from

NOTE:

Figure 23.

MRCOOL, LLC

507276-05CPage 18 of 57 mrcool.com

IMPORTANT

Capacity Min. Vent Length*

135 **

Table 4.

045, 070,

090, 110,

135

Standard or

Concentric?

See Table 3

Intake or

Exhaust?

2”, 2-1/2”

or 3”

Furnace capacity?

1

Which termination?

2

Which needs most

elbows?

3

How many?

4

Desired pipe size?

5

What is the altitude?

6

Use Table 5 to find

max pipe length.

7

Figure 24.

507276-05C Page 19 of 57mrcool.com

MG*M95SE*XA Maximum Allowable Intake or Exhaust Vent Length in Feet

Number

of 90°

Elbows

Used

Capacity Capacity Capacity Capacity

045 070 090 110 135 045 070 090 110 135 045 070 090 110 135 045 070 090 110 135

1 25 20

76 61 39 19 110 95 63 38 132 132 113 113 109

2 20 15 71 56

105 90 58 33 127 127 108 108

3 15 10 66 51 29 9 100 85 53 28 122 122 103 103 99

10 61 95 80 23 117 117 98 98

5 56 19 90 75 18 112 112 93 93 89

6 51 36

85 70 38 13 107 107 88 88

7 31 9 80 65 33 8 102 102 83 83 79

8

26 75 60 28 97 97 78 78

9 36 21 70 55 23 92 92 73 73 69

10 31 16 65 50 18 87 87 68 68

Number

of 90°

Elbows

Used

Capacity Capacity Capacity Capacity

045 070 090 110 135 045 070 090 110 135 045 070 090 110 135 045 070 090 110 135

1 25 20

76 61 39 110 95 63 38 132 132 113 113 109

2 20 15 71 56

105 90 58 33 127 127 108 108

3 15 10 66 51 29 100 85 53 28 122 122 103 103 99

10 61 95 80 23 117 117 98 98

5 56 19 90 75 18 112 112 93 93 89

6 51 36

85 70 38 13 107 107 88 88

7 31 9 80 65 33 8 102 102 83 83 79

8

26 75 60 28 97 97 78 78

9 36 21 70 55 23 92 92 73 73 69

10 31 16 65 50 18 87 87 68 68

Table 5A.

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