MRCOOL MGD95SE110C5XA Installation Manual

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

Signature Series

MGD*95SE*XA Gas Furnace

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.

INSTALLATION INSTRUCTIONS

MGD*95SE*XA

Warm Air Gas Furnace

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

Table of Contents

Unit Dimensions 2
Parts Arrangement 3
Gas Furnace 4

Safety Information 4

12

Duct System 12

14

28
31
34

4

6
6
9

37

41
42
43
44
46
52

WARNING

Manufactured By

MRCOOL,LLC

Hickory, KY 42051

Save these instructions for future reference

507277-03C Page 1 of 53mrcool.com

CAUTION

*P507277-03C*

(P) 507277-03C

Unit Dimensions

COMBUSTION

AIR INTAKE

EXHAUST AIR

OUTLET

2 1/16 (52)

5

(127)

2 1/4

(57)

9/16

(14)

Return Air

B

Opening

9/16
(14)

TOP VIEW

33

(838)

3/4
(19)

AIR FLOW

Supply

C

Air

9/16
(14)

3/4
(19)

1 (25)

Front Panel

2 (51)

Either Side

GAS PIPING INLET

(Either Side)

9

1/8 (232) Right

6 9/16 (167) Left

27 3/4

(705)

19

(494)

ELECTRICAL INLET

(Either Side)

CONDENSATE

TRAP CONNECTION

(Either Side)

6

1/2 (165)

Either Side

19

1/4

(489)

7/16

9

(229)

Supply

Air

9/16
(14)

3/4

(19)

FRONT VIEW

Capacity

045-3
070-4

090-4
110-5

WEIVEDIS

A B C

in. mm in. mm in. mm

17-1/2 446 16-3/8 416 16 406

21 533 19-7/8 504 19-1/2 495

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Parts Arrangement

CONTROLBOX

(Includesintegratedcontrol,

transformer and door switch)

BLOWER

COMPARTMENT

ACCESS PANEL

BAG ASSEMBLY

BLOWERMOTOR

(hidden)

HEATING

COMPARTMENT

ACCESS PANEL

COMBUSTION
AIR INDUCER

GAS VALVE

(include

BLOWERDECK

PRIMARY LIMIT

COLDENDHEADERBOX

HEAT EXCHANGER

BURNERBOX ASSEMBLY

sensor, rolloutswitchesand ignitor)

Figure 1.

507277-03C Page 3 of 53mrcool.com

Gas Furnace

NOTE: In Direct Vent installations, combustion air is taken

Non-Direct Vent installations, combustion air is taken from

Shipping and Packing List

1 - Wire tie

NOTE:

Figure 2.

Safety Information

DANGER

DANGER OF EXPLOSION!

Building Codes

507277-03CPage 4 of 53 mrcool.com

Heating Unit Installed Parallell to Air Handler Unit

Locations and Clearances

NOTE:

NOTE:

NOTE:

GAS UNIT

Dampers

(openduring heating

operationonly)

AIR HANDLER

Dampers

(openduring cooling

operationonly)

Figure 3.

Installed in Combination with a Cooling Coil

HEAT or COOL

Quincy, MA 02269

Use of Furnace as a Construction Heater

DO NOT USE THE UNIT FOR CONSTRUCTION HEAT
UNLESS ALL OF THE FOLLOWING CRITERIA ARE
MET:

507277-03C Page 5 of 53mrcool.com

EQUIPMENT MAY EXPERIENCE PREMATURE
COMPONENT FAILURE AS A RESULT OF FAILURE TO

•

•

NOTE:

•

•

•

CAUTION

Combustion, Dilution & Ventilation Air

DISCLAIMS ALL LIABILITY IN CONNECTION WITH

NOTWITHSTANDING THE FOREGOING, INSTALLER
IS RESPONSIBLE FOR CONFIRMING THAT THE USE
OF CONSTRUCTION HEAT IS CONSISTENT WITH
THE POLICIES AND CODES OF ALL REGULATING

General

•

•

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

•

507277-03CPage 6 of 53 mrcool.com

WARNING

CAUTION

•

•

•

•

•

•

•

•

•

•

•

•

•

507277-03C Page 7 of 53mrcool.com

Air from Inside

ROOFTERMINATED

EXHAUSTPIPE

SIDEWALL

TERMINATED

EXHAUSTPIPE

(ALTERNATE

LOCATION)

FURNACE

OPENINGS

(ToAdjacent

Space)

NOTE : Each opening shall have a free area of at least one square inch
per 1,000 Btu(645 mm
all equipmentin the enclosure,but not lessthan100squareinches
(64516 mm

2

).

2

per .29 kW) per hour ofthetotalinputratingof

Figure 4.

Inside

Air from Outside

(Inlet Air from Crawl Space and Outlet Air to Ventilated Attic)

VENTILATIONLOUVERS

ROOFTERMINATED

EXHAUSTPIPE

(Each end of attic)

(All Air Through Ventilated Attic)

ROOFTERMINATED

EXHAUSTPIPE

OUTLET

AIR

SIDEWALL

TERMINATED

EXHAUSTPIPE

(ALTERNATE

LOCATION)

FURNACE

NOTE: The inlet and outlet air openings shall each have a free area of
at least one square inch per 4,000 Btu (645 mm

VENTILATION LOUVERS

(Each end of attic)

INLETAIR

(Ends12"above

bottom)

2

per 1.17 kW) per hour

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

Figure 6.

Outside

ROOFTERMINATED

EXHAUSTPIPE

OUTLET

AIR

SIDEWALL

TERMINATED

EXHAUSTPIPE

(ALTERNATE

LOCATION)

NOTE: Theinlet and outlet air openings shall each have a free area
of at least one square inch per 4,000 Btu (645 mm

FURNACE

INLET

AIR

2

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

Figure 5.

Outside

VENTILATION

LOUVERS

(Forunheated

crawl space)

per 1.17 kW) per

OUTLET AIR

SIDEWALL

TERMINATED

EXHAUSTPIPE

(ALTERNATE

LOCATION)

NOTE: Each air duct opening shall have a free area of at least one
square inch per 2,000 Btu (645 mm

FURNACE

INLETAIR

2

per .59 kW) 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 communi­cate directly with the outdoors, each opening shall have a free area
of at least 1 square inch per 4,000 Btu (645 mm

2

per1.17 kW)per

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

Figure 7.

Outside

507277-03CPage 8 of 53 mrcool.com

Roof Terminated

Exhaust Pipe

Ventilation Louvers

12 in.(305mm) Above

Inlet Air

(Minimum

attic floor)

Installation

Setting Equipment

*Intake Debris

Screen

(Provided)

Furnace

* See Maximum Vent Lengths table

NOTE-The inlet and outlet air openings shall each have a free area
of at least one square inch per 4,000 Btu (645mm
hour of the total input rating of all equipment in the enclosure.

2

per 1.17kW) per

Figure 8.

(Inlet Air from Ventilated Attic and Outlet Air to

Outside)

Roof Terminated

Exhaust Pipe

Inlet Air

(Minimum

Ventilation

Louvers

(Crawl space)

Furnace

12 in.(305mm)

Above crawl

space floor)

CAUTION

Shipping Bolt Removal

Coupling or
3 in. to 2 in.

Transition

(Field Provided)

*Intake Debris Screen Provided)

* See Maximum Vent Lengths table

NOTE-The inlet and outlet air openings shall each have a free area
of at least one square inch per 4,000 Btu (645mm
hour of the total input rating of all equipment in the enclosure.

2

per 1.17kW) per

Figure 9.

(Inlet Air from Ventilated Crawl Space and Outlet Air

to Outside)

CAUTION

Figure 10.

NOTE:

WARNING

507277-03C Page 9 of 53mrcool.com

AIR FLOW

Top

AIR FLOW

AIR FLOW

1/2"

max.

Left Side Right Side

FRONTVIEW SIDEVIEW

Unit must be level side−to−side. Unit may be positioned
from level to 1/2"towardthefrontto aidin draining.

Figure 11. Setting Equipment

Figure 12.

WARNING

SIDEVIEW

Bottom

Top 0

*Front 0

*Front 0

Back 0

Back 0

Sides 0†

Sides 0†

Vent 0

Floor NC‡

*Frontclearancein alcove installationmustbe 24 in. (610mm).
Maintain aminimumof 24 in. (610mm)forfront serviceaccess.
†Allow proper clearances to accommodate condensate trap.
‡Thefurnace may be installed on a combustible wood
additive base is install

oor ifan optional

Figure 13.

Clearances

See Figure 14

0

0

NC‡

Cabinet Width

NOTE

Table 1.

Front to Rear Side to Side

in. mm in. mm

19-3/4 502 16-5/8 422

19-3/4 502 20-1/8 511

507277-03CPage 10 of 53 mrcool.com

FURNACE

PROPERLY

SIZED FLOOR

OPENING

NON-COMBUSTIBLE
FLOORING

Figure 14.

Installation on Combustible Flooring

See Figure 15

CAUTION

SUPPLY AIR

PLENUM

NOTE:

Installation on Cooling Coil Cabinet

See Figure 16

NOTE:

FURNACE

Cabinet

Width

(21”)

Table 2.

FURNACE

PROPERLY

SIZED FLOOR

OPENING

Catalog

Number

Front to Rear Side to Side

in. mm in. mm

11M60 22 559 18-3/4 476

11M61 22 559 22-3/4 578

SUPPLY AIR

PLENUM

COMBUSTIBLE
FLOORING BASE

COMBUSTIBLE

FLOORING

Figure 15.

PROPERLY

SIZED FLOOR

OPENING

COOLING COIL

PLENUM

Figure 16.

507277-03C Page 11 of 53mrcool.com

PLENUM

(Field Provided)

SECURE FROM

OUTSIDECABINET

Return Air Plenum

NOTE:

SEALINGSTRIP

(Field Provided)

(Field Provided)

SECUREFROM

INSIDECABINET

Filters

PLENUM

Side View

Figure 17.

Side View

Figure 18.

CABINET

SIDE PANEL

SEALINGSTRIP

(Field Provided)

CABINET

SIDE PANEL

D1785

F891

D2466

F441

F438

D2241

F442

Furnace Cabinet Width

17-1/2”

21”

Table 3.

Duct System

NOTE:

Supply Air Plenum

PRIMER & SOLVENT CEMENT

Cement

CANADA PIPE & FITTING & SOLVENT

CEMENT

POLYPROPYLENE VENTING SYSTEM

F628

D1527

D2468

D2661

D2665

ASTM

SPECIFICATION

F656

D2564

F493

D2235

D2564, D2235,

F493

D3138

MARKING

ULCS636

ULC-S636

TM

Table 4.

ULC-S636

ULC-S636

507277-03CPage 12 of 53 mrcool.com

Capacity

045

070

090

110

CAUTION

Canadian Applications Only

IMPORTANT

Standard Concentric

Outdoor Exhaust

Vent Pipe

Dia.
(in.)

2 YES YES YES

2-1/2 YES YES YES

3 YES YES YES

2 YES YES YES

2-1/2 YES YES YES

3 YES YES YES

2 YES YES YES YES

2-1/2 YES YES YES YES

3 YES YES YES YES

2 YES YES YES YES

2-1/2 YES YES YES YES

3 YES YES YES YES

Accelerator

(Dia. x Length)

Outdoor Exhaust

Accelerator

(Dia. x Length)

Kit

51W11**

Concentric

Kit

71M80

or

†44W92††

Concentric

Kit

69M29

or

†44W92††

Concentric

Kit

60L46

or

44W93†

Table 5. Outdoor Termination Kits Usage

507277-03C Page 13 of 53mrcool.com

Joint Cementing Procedure

Venting Practices

NOTE:

DANGER

DANGER OF EXPLOSION!

SCHEDULE 40

PVC − 5’

all other pipe* − 3’

* SeeTable4forallowable pipe.

NOTE: Isolate piping at the point where it exits the outside wall or
roof in order to prevent transmission of vibration to the structure.

Wall Thickness Guidelines

24"maximum
3/4"minimum

Wall

edistuoedisni

insulation

(if required)

Figure 19. Piping Suspension Guidelines

NOTE:

NOTE:

REPLACING FURNACE THAT

CHIMNEY

OR GAS

VENT

(Checksizing

for remaining

appliance)

FURNACE
(Removed from
from common
vent system)

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.

WAS PART OF A COMMON

VENT SYSTEM

WATER

HEATER

Figure 20.

OPENINGS

(To Adjacent

Room)

Exhaust Piping

See Figure 22

507277-03CPage 14 of 53 mrcool.com

CAUTION

IMPORTANT

CAUTION

Vent Piping Guidelines

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

In Direct Vent installations, combustion air is taken from

Furnace capacity?

1

Which termination?

2

Which needs most

3

elbows?

How many?

4

045, 070,

090, 110

Standard or
Concentric?
See Table 5

Intake or

Exhaust?

Capacity Min. Vent Length*

045, 070, 090, 110

Table 6. Minimum Vent Pipe Length

507277-03C Page 15 of 53mrcool.com

Desired pipe size?

5

What is the altitude?

6

Use Table 7 to find

7

max pipe length.

2”, 2-1/2”

or 3”

Figure 21.

Maximum Allowable Intake or Exhaust Vent Length in Feet

Number

of 90

Elbows

Used

1 20 15

2 15 10 56 41 19 95 75 38 122 122 103 103

3 10

4

5 41 26 80 60 23 107 107 88 88

6 36 21 75 55 18 102 102 83 83

7 31 16 70 50 13 97 97 78 78

8 26 11 65 45

9 21

10 16 55 35 82 82 63 63

Number

of 90

Elbows

Used

1 15 10

2 10

3

4 38 23

5 33 18 70 50 19 91 91 84 84

6 28 13 65 45 14 86 86 79 79

7 23

8 18 55 35 76 76 69 69

9 13 50 30 71 71 64 64

10 n/a 45 25 66 66 59 59

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

n/a

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

n/a

Capacity Capacity Capacity Capacity

61 46 24

51 36 14 90 70 33 117 117 98 98

46 31

n/a n/a

n/a

n/a

Capacity Capacity Capacity Capacity

53 38 22

48 33 17 85 65 34 106 106 99 99

43 28 12 80 60 29 101 101 94 94

n/a

n/a n/a

n/a

n/a

n/a

100 80 43

85 65 28 112 112 93 93

n/a

60 40 87 87 68 68

90 70 39

75 55 24 96 96 89 89

n/a

60 40

127 127 108 108

n/a

92 92 73 73

n/a

111 111 104 104

n/a

81 81 74 74

n/a

Table 7.

507277-03CPage 16 of 53 mrcool.com