Reznor XE Installation Manual
NOTICE:
The information contained on the following page(s) was produced
prior to May 1, 2014. On that date Reznor became part of
Nortek, Inc.
References to any other company afliations are no longer valid.
©2014 Reznor, LLC. All Rights Reserved.
Trademark notice: Reznor is registered in at least the United States.
0514 PDF Form Cover1
®
Table of Contents Para. Page
Installation and Operation ......... 1-29 ... 1-30
Check Installation and Start-Up ... 30 . 30-31
Optional Accessories ................. 31-36 . 31-41
Service/Maintenance .................. 37-41 . 41-44
Index by Page Number
Adjusting Blower Speed ............................... 24
Optional Air Flow Proving Switch .............. 2 4
Opt High Ambient Limit Control .................. 2 5
AquaSaver Timer Adjustment ........................ 34
Belts ............................................................... 24
Blocked Vent Switch ...................................... 25
Blower Motors ............................................... 24
Blower Rotation ............................................. 24
Burner Air Adjustment .................................. 30
Burner Rack Removal ..................................... 42
Burners ........................................................... 29
Carryover System ........................................... 29
Check Installation and Start-Up ....................30
Chlorines .......................................................... 7
Cleaning Pilot and Main Burners .................. 42
Cleaning the Heat Exchanger ........................ 4 2
Clearances ........................................................ 7
Optional Cooling Coil Cabinet ..................... 38
Combustion Air Requirements ........................ 7
Condensate Drain .......................................... 13
Location of Controls ...................................... 17
Cooling Coil Cabinet .................................... 38
Optional Dampers and Controls ....................35
Dimensional Data ............................................ 3
Direct Digital Control System ....................... 29
Discharge Dampers ........................................ 39
Disconnect Switch ......................................... 17
Duct Connections .......................................... 13
Optional Ductstat .......................................... 26
Electrical Supply and Connections ...............16
Optional Electronic Modulation .................. 26
Opt Evaporative Cooling Module ................ 3 2
Optional Fan Control .................................... 25
Optional Dirty Filter Switch .........................38
Filter Arrangements ....................................... 38
Optional Filter Rack and Filters .................... 37
Gas Piping and Pressures .............................. 14
Gas V alve ........................................................41
General ............................................................. 1
Hazard Intensity Levels ................................... 2
Ignition Controller ......................................... 29
Installation Codes ............................................ 2
Limit Control .................................................24
Manifold Pressure Setting ............................. 15
Optional Mechanical Modulation ................. 26
Mounting Furnaces (Indoor) ........................... 8
Mounting Outdoor Models ............................. 8
Optional Equipment ...................................... 31
100% Outside Air Hood ................................31
Pilot and Ignition Systems ............................ 29
Reverse Flow, Limit Control ..........................25
Roof Curb Assembly and Installation .............. 9
30% Screened Air Hood Opening ................ 32
Optional 4-foot Stack Extension ................... 1 2
Start-Up .......................................................... 30
Suspending Furnaces ....................................... 8
Troubleshooting ............................................ 43
Optional Two-Stage Operation ..................... 25
Uncrating ......................................................... 2
V alve ...............................................................25
Variable Frequency Drive .............................. 24
Vent Cap Installation ..................................... 12
Optional Power Venting ................................ 12
Venting ........................................................... 11
Venting Requirements .................................... 11
Optional Vertical Flue Discharge .................. 1 3
Warranty ........................................................... 2
Wiring Diagrams ............................................ 18
Form I-XE/CRGB/RPB (V ersion C)
Obsoletes Form I-XE/RGB /RPB (V ersion B)
Installation / Operation / Maintenance
Applies to: Model Series
XE, CRGB, RPB Packaged
Duct Furnace Assemblies
FOR YOUR SAFETY
If you smell gas:
1. Open windows.
2. Don't touch electrical switches.
3. Extinguish any open flame.
4. Immediately call your gas supplier .
FOR YOUR SAFETY
The use and storage of gasoline or other flammable vapors and liquids in
open containers in the vicinity of this appliance is hazardous.
WARNING: Improper installation, adjustment, alteration, service, or
maintenance can cause property damage, injury or death. Read the
installation, operation, and maintenance instructions thoroughly before
installing or servicing this equipment.
WARNING: Gas-fired appliances are not designed for use in hazardous
atmospheres containing flammable vapors or combustible dust, in
atmospheres containing chlorinated or halogenated hydrocarbons, or in
applications with airborne silicone substances. See Hazard Levels, Page 2.
GENERAL
Installation should be done by a qualified agency in accordance with the instructions in this
manual and in compliance with all codes and requirements of authorities having jurisdiction.
The instructions in this manual apply to the packaged systems listed below.
Model Series
Designation
Installation Vent CFM
XE Standard
Indoor
HXE High
CRGB Standard
HCRGB High
Outdoor
RPB Standard
HRPB High
Form I-XE/CRGB/RPB, P/N 131782 Rev 5, Page 1
Characteristics
Thermal
Efficiency
Gravity
80%
Power
1. Approval and Installation Codes
p
p
p
p
p
p
The models covered in this manual are design certified or approved duct
furnaces that are factory assembled with air handing components, creating a unified packaged furnace/blower system. The packaged system
models listed on page 1 are design-certified to ANSI and CSA Standards
by the Canadian Standards Association. All models are approved for
installation in the United States. All models except Model CRGB and
Model HCRGB are approved for installation in Canada. All furnaces are
approved for use with either natural gas or propane. The type of fuel for
which the furnace is equipped and the correct firing rate are shown on
the rating plate attached to the unit. Electrical characteristics are shown
on both the motor nameplate and the unit rating plate.
These units must be installed in accordance with local building codes. In
the absence of local codes, in the United States, the unit must be installed in accordance with the National Fuel Gas Code NFPA54/ANSI
Z223.1 (latest edition). A Canadian installation must be in accordance
with the CSA B149.1 Natural Gas and Propane Installation Code. These
codes are available from CSA Information Services, 1-800-463-6727.
Local authorities having jurisdiction should be consulted before installation is made to verify local codes and installation procedure requirements.
Special Installations (Aircraft Hangars/Garages)
Installations in aircraft hangars should be in accordance with NFP A No.
409 (latest edition), Standard for Aircraft Hangars; in public garages in
accordance with NFPA No. 88A (latest edition), Standard for Parking
Structures; and for repair garages in accordance with NFPA No. 88B
(latest edition), Standard for Repair Garages. In Canada, installations in
aircraft hangars should be in accordance with the requirements of the
enforcing authorities, and in public garages in accordance with CSA
B149.1 codes.
WARNING: To ensure safety, follow the lighting
instructions located on the outlet box cover plate
in the heater section of the packaged furnace
assembly .
HAZARD INTENSITY LEVELS
used for W arnings in this Manual
1. DANGER: Failure to comply will result in
severe personal injury or death and/or
property damage.
2. W ARNING: Failure to comply could result in
severe personal injury or death and/or
property damage.
3. CAUTION: Failure to comply could result in
minor personal injury and/or property damage.
3. Uncrating and Preparation
This furnace was test operated and inspected at the factory prior to
crating and was in operating condition. If the equipment has incurred
any damage in shipment, document the damage with the carrier and
contact your Reznor distributor.
Check the rating plate for the gas specifications and electrical characteristics of the furnace to be sure that they are compatible with the gas and
electric at the installation site. Read this booklet and become familiar
with the installation requirements of your particular model. If you do
not have knowledge of local requirements, check with the local gas
company or any other local agencies who might have requirements
concerning this installation. Before beginning, make preparations for
necessary supplies, tools, and manpower.
Check to see if there are any field-installed options that need to be
assembled to the furnace prior to installation.
Option Parts - Some gas control options will have parts either shipped
loose with the heater or shipped separately. If your unit is equipped
with any of the following gas control options, be sure these parts are
available at the job site.
2. Warranty
Refer to limited warranty information on the warranty card in the
"Owner's Envelope".
W ARRANTY : Warranty is void if......
a . Packaged furnaces are used in atmospheres containing
flammable vapors or atmospheres containing
chlorinated or halogenated hydrocarbons or any
contaminant (silicone, aluminium oxide, etc.) that
adheres to the spark ignition flame sensing probe.
b . Wiring is not in accordance with the diagram furnished
with the heater .
c. Unit is installed without proper clearances to
combustible materials or without proper ventilation and
air for combustion. (See Paragraphs 5 and 6.)
d . Furnace air throughput is not adjusted within the range
specified on the rating plate.
Heating -- Gas Option AG7
Thermostat, P/N 48033
Cont rol O
Makeu
Gas Control
tions Option AG9
O
(If an o
remote console O
is ordered, the
control switch
is mounted on
the console.) O
Other shipped-separate options could include a roof curb, a cooling coil
cabinet, a screened outside air hood, a gas shutoff valve, a condensate
drain fitting, a thermostat, a different control switch, a power venter, a
remote console, a manual fan switch, a vertical vent terminal, a gas
supply regulator, and/or a disconnect switch. Or, if equipped with an
optional evaporative cooling module, a water hammer arrestor or fill and
drain or freeze kit could be shipped separately.
tion
Air -- Option AG3, AG6, AG8 or AG13
Control Switch, P/N 29054
Remote Temperature Selector, P/N 48042
tional
Control Switch, P/N 29054
tion AG15
Remote Temperature Selector, P/N 115848
Stage Adder Module, P /N 115849
Control Switch, P/N 29054
tion AG16
Remote Temperature Selector, P/N 115848
Stage Adder Module, P /N 115849
Remote Display Module, P/N 115852
Control Switch, P/N 29054
Option AG39
Remote Temperature Selector, P/N 174849
Form I-XE/CRGB/RPB, Page 2
4. Dimensions
FIGURE 1A - Dimensions (inches and mm) of Indoor/Gravity V ented System
Dimensions of Model (H)XE with Standard Blower Cabinet (Standard blower cabinet has "full open" end and will not accommo-
date dampers. An optional cabinet is available with a smaller horizontal inlet that will accommodate dampers; see dimensional
drawing below . An optional bottom inlet will also accommodate dampers.)
3/4 (19)
Top View
J
G
F
Side View
3-5/8 (92)
(4)Mounting Sockets
K
1 IPS free turning
female pipe thread
3/4 (19)
18
(457)
3/4
(19)
8 (203)
H
W
K
X
C
B
A
E
Control Wiring
Blower Furnace
Gas
Supply Wiring
AIRFLOW
Entrance
Entrance
FurnaceBlower
4 (102)
59 (1499)
2-1/8
(54)
Dimensions of Model (H)XE with Optional Blower Cabinet (Optional blower cabinet has a horizontal inlet that will accommodate
dampers. The cabinet also has a bottom inlet that is shipped with a cap; the bottom inlet will accommodate dampers.)
Top View
J
C
W
1-3/4 (44)
X
C
Blower
60 (1524)
Dimension Key:
A x 18" (457mm) = Discharge Opening
B = Hanger Centerline - Furnace Section
G
F
3-1/4 (83)
K
B
A
19-1/2
(495)
Control Wiring
Furnace
Gas
D
Supply Wiring
4 (102)
2-1/8
(54)
3-1/4 (83)
C x E = Return Air Opening with Standard Cabinet
C x 19-1/2" (495mm) = Return Air Openings with Optional Cabinet
X = Hanger Centerline - Standard and Optional Blower Cabinet
Entrance
Entrance
19-1/2
(495)
Side View
3-5/8 (92)
AIRFLOW
Vertical return air
opening is capped
at the factory.
(4)Mounting Sockets
K
1 IPS free turning
female pipe thread
FurnaceBlower
3/4 (19)
18
H
(457)
3/4
(19)
8 (203)
Dimensions (inches and mm ) - Gravity-Vented/I ndoor Mo dels XE/H XE
Gas Connection
Natural Propa ne
75
100
125
150,
175
200,
225
250
300
350
400
inche s
mm
inche s
mm
inche s
mm
inche s
mm
inche s
mm
inche s
mm
inche s
mm
inche s
mm
inche s
mm
ABSize
12-1/2 13-1/2 17-3/8 9-1/2 27-3/4 18 1/2 1/2 3-3/4 32-1/4 36-1/2 5 Rd 22 16-1/4
318 343 441 241 705 457 13 13 95 819 927 127 Rd 559 413
12-1/2 13-1/2 17-3/8 9-1/2 27-3/4 18 1/2 1/2 3-3/4 32-1/4 36-1/2 6 Rd 22 16-1/4
318 343 441 241 705 457 13 13 95 819 927 152 Rd 559 413
15-1/4 16-1/4 17-3/8 9-1/2 27-3/4 18 1/2 1/2 3-3/4 32-1/4 36-1/2 7 Ov 22 16-1/4
387 413 441 241 705 457 13 13 95 819 927 178 Ov 559 413
20-3/4 21-3/4 23 9-1/2 27-3/4 19-3/8 1/2 1/2 2-3/8 32-1/4 36-1/2 8 Ov 27-1/2 21-3/4
527 552 584 241 705 492 13 13 60 819 927 203 Ov 699 552
26-1/4 27-1/4 28-3/8 12-1/2 30-3/4 18 1/2 1/2 2-1/4 35-1/4 38 8 Rd 33 27-1/4
667 692 721 318 781 457 13 13 57 895 965 203 Rd 838 692
34-1/2 35-1/2 36-5/8 12-1/2 30-3/4 18 1/2 1/2 2-1/4 35-1/4 38 10 Ov 41-1/4 35-1/2
876 902 930 318 781 457 13 13 57 895 965 254 Ov 1048 902
34-1/2 35-1/2 36-5/8 12-1/2 30-3/4 18 3/4 1/2 2-1/4 35-1/4 38 10 Ov 41-1/4 35-1/2
876 902 930 318 781 457 19 13 57 895 965 254 Ov 1048 902
40 41 42-1/8 12-1/2 30-3/4 19-3/8 3/4 1/2 7/8 35-1/4 38 12 Ov 46-3/4 41
1016 1041 1070 318 781 492 19 13 22 895 965 305 Ov 1187 1041
45-1/2 46-1/2 47-5/8 12-1/2 30-3/4 18 3/4 1/2 2-1/4 35-1/4 38 12 Ov 52-1/4 46-1/2
1156 1181 1210 318 781 457 19 13 57 895 965 305 Ov 1327 1181
CDEF WXGH J K
Form I-XE/CRGB/RPB, P/N 131782 Rev 5, Page 3
4. Dimensions (cont'd)
*
g
p
FIGURE 1B Dimensions,
Outdoor/
GravityV ented Model
Series CRGB
4-5/8
(117)
31-11/32
(796)
Model
Series
CRGB,
HCRGB
Size
75,
100
125
175
225
250
300
350
400
ABC
inches
inches
inches
inches
inches
inches
inches
inches
28-5/8 17-3/8 25-7/8 12-1/2 6 9 None 1/2 1/2
mm
727 441 657 318 152 229 None 13 13
28-5/8 17-3/8 25-7/8 15-1/4 8 11-1/2 None 1/2 1/2
mm
727 441 657 387 203 292 None 13 13
34-1/8 22-7/8 31-3/8 20-3/4 8 11-1/2 None 1/2 1/2
mm
867 581 797 527 203 292 None 13 13
39-5/8 28-3/8 36-7/8 26-1/4 10 15 None 1/2 1/2
mm
1006 721 937 667 254 381 None 13 13
47-7/8 36-5/8 45-1/8 34-1/2 10 15 None 1/2 1/2
mm
1216 930 1146 876 254 381 None 13 13
47-7/8 36-5/8 45-1/8 34-1/2 10 15 None 3/4 1/2
mm
1216 930 1146 876 254 381 None 19 13
53-3/8 42-1/8 50-5/8 40 12 14-1/8 plus 12 3/4 1/2
mm
1362 1070 1286 1016 305 359 plus 305 19 13
58-7/8 47-5/8 56-1/8 45-1/2 12 14-1/8 plus 12 3/4 1/2
mm 1470 1210 1426 1156 305 359 plus 305 19 13
Standard Horizontal Air Inlet 19-1/2 (495) x B
ening
Air O
Dimensi ons
Optional Return Air Op ening (bottom) 19-1/2 (495) x B
Standard Horizontal Discharge Air Opening 18 (457) x D
Optional Vertical Discharge Air Opening (Op tion AQ5 or AQ8 Do wnturn Plenum****) 19-1/2 (495) x B
**** for downturn plenum with cooling coil cabinet, see page 6.
61-3/8 (1559)
Entrance
Blower
Cabinet
43-17/32 (1106)
Screened
Outside
Air Hood -
Option AS2
1-1/32 (26)
Control Wiring
5 (127)
19-1/2
(495)
Furnace
Airflow
Gas
D
I.D. Heig ht Extension Natural Propane
8-1/2(215)
3/4(19)
39-3/16*
18
(457)
3/4(19)
11-1/4(286)
Vent Cap Gas Connection
A
(995)
38-1/8**
(968)
NOTES:
*Height from top of
cabinet to top of curb
cap.
**Height from top of
cabinet to bottom of
cabinet side.
*** If system has a cooling
coil cabinet, add length
dimension on page 6 for full
system length.
**** The two-position
discharge dampers in
Option AQ8 fit in the
discharge air opening. The
damper motor fits inside the
downturn plenum cabinet.
For dimensions with
downturn plenum cabinet
with a cooling coil cabinet,
see page 6.
Form I-XE/CRGB/RPB, Page 4
1-1/32
(26)
5 (127)
19-1/2
(495)
4-3/32
(104)
Field Wiring
(line voltage)
61-7/8 (1572)
Left Side View with Horizontal Discharge
Field Control
86-11/16 (2202)
Wiring
Entrance
Blower
Cabinet
Optional
Return
Air Inlet
19-1/2
(495)
Furnace
Airflow
Gas
Field Wiring
(line voltage)
38-5/8 (981)
Vertical
Discharge
19-1/2
85-13/16 (2180)
Left Side View with Vertical Dischar
Plenum
Optional
Downturn
(495)
Curb Cap
39-3/16*
(995)
Cabinet
Curb Cap
4-3/32
(104)
e
3/4(19)
Front View with
Standard Horizontal Discharge
3/4(19)
D
B
C
A
38-1/8*
(968)
4-1/4
(108)
B
C
4-1/4
(108)
Front View with
Opt ional Vertical Discharge
(Downturn Plenum Option AQ5 or AQ8)
FIGURE 1C Dimensions, Outdoor/
Power-V ented Model
Series RPB
Model Size
150, 175
200, 225
(H)-RPB
125
250
300
350
400
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
AB
CD
28-5/8 17-3/8 25-7/8 15-1/4 1/2 1/2
727 441 657 387 13 13
34-1/8 22-7/8 31-3/8 20-3/4 1/2 1/2
867 581 797 527 13 13
39-5/8 28-3/8 36-7/8 26-1/4 1/2 1/2
1006 721 937 667 13 13
47-7/8 36-5/8 45-1/8 34-1/2 1/2 1/2
1216 930 1146 876 13 13
47-7/8 36-5/8 45-1/8 34-1/2 3/4 1/2
1216 930 1146 876 19 13
53-3/8 42-1/8 50-5/8 40 3/4 1/2
1362 1070 1286 1016 19 13
58-7/8 47-5/8 56-1/8 45-1/2 3/4 1/2
1470 1210 1426 1156 19 13
Gas Connection
Natural Propane
Air Openings: Dimensions
Standard Horizontal Air Inlet 19-1/2 (495) x B
Optional Return Air Opening (bottom) 19-1/2 (495) x B
Standard Horizontal Discharge Air Open ing 18 (457) x D
Optional Vertical Discharge Air Opening (with Option AQ5 or AQ8
Downtu rn P lenum****)
19-1/2 (495) x B
****for downturn plenum with cooling coil cabinet, see page 6.
4-5/8
(117)
31-11/32
(796)
43-17/32 (1106)
Screened
Outside
Air Hood -
Option AS2
NOTES:
*Height from top of
cabinet to top of curb
cap.
**Height from top of
cabinet to bottom of
cabinet side.
*** If system has a cooling
coil cabinet, add length
dimension on page 6 for full
system length.
**** The two-position
discharge dampers in
Option AQ8 fit in the
discharge air opening. The
damper motor fits inside
the downturn plenum
cabinet. For dimensions
with downturn plenum
cabinet with a cooling coil
cabinet, see page 6.
1-1/32 (26)
1-1/32
(26)
5 (127)
19-1/2
(495)
4-3/32
(104)
61-3/8 (1559)
Control Wiring
Entrance
5 (127)
19-1/2
(495)
Blower
Cabinet
Field Wiring
(line voltage)
61-7/8 (1572)
Left Side View with Horizontal Discharge
86-11/16 (2202)
Field Control
Wiring
Entrance
Blower
Cabinet
Optional
Return
Air Inlet
19-1/2
(495)
Furnace
Airflow
Gas
Field Wiring
(line voltage)
38-5/8 (981)
85-13/16 (2180)
Left Side View with Vertical Discharge
Furnace
Airflow
Gas
Optional
Vertical
Discharge
19-1/2
(495)
8-1/2(215)
3/4(19)
18
(457)
3/4(19)
11-1/4(286)
Curb Cap
Plenum
Cabinet
Downturn
A
39-3/16*
(995)
3/4(19)
Front View with
Standard Horizontal Discharge
3/4(19)
D
B
C
A
39-3/16*
(995)
Curb Cap
4-3/32
(104)
4-1/4
(108)
Opt ional Vertical Discharge
B
C
Front View with
(Downturn Plenum Option AQ5 or AQ8)
38-1/8**
(968)
38-1/8**
(968)
4-1/4
(108)
Form I-XE/CRGB/RPB, P/N 131782 Rev 5, Page 5
4. Dimensions (cont'd)
Refrigerant
R22 (DX)
Coil
Cabinet Options
AU3, AU13,
AU14
7/8 (22)
D
Side View
DX Coil
Cabinet
Drain Pan
Outlet
(1 FPVC)
2 (51)
Coil
Header
Housing
7/8 (22)
(7/8 or 1-3/8)
Suction Line
Connection
(1-5/8 or 2-1/8)
14-1/2
(368)
5-1/8 (130)
Liquid Line
Connections
12-1/2
(318)
16-1/4
(413)
8 (203)
3/4
(19)
(Option AU3)
A
B
Front View
DX Coil
Cabinet with
Horizontal
Discharge
3/4
(19)
18
(457)
11-1/4
(286)
3/4
(19)
44-1/4
(1124)
FIGURE 1D -
Optional Cooling
Coil Cabinets with
DX or Chilled
Water Coil, with
or without
Downturn Plenum
Cabinet (Applies
to Outdoor
Models)
F
(Inside of Curb Cap)
E
(Curb Cap Length)
Connection Knockouts
Liquid Line
(alternate locations)
Bottom View
DX Coil
Cabinet
G
2-3/8
(60)
3-1/2(89)
6-5/8
(168)
3-1/4(83)
Chilled W ater Cooling Coil Cabinet in Options AU2, AU1 1, AU12
Downturn Plenum Cabinet (factory attached to
either type of Cooling Coil Cabinet)
Side View
Side View
Optional
Optional
Downturn
Downturn
Plenum
Plenum
Cabinet
Cabinet
19-1/2 (495)
Discharge Air
4-1/4
(108)
Discharge Damper Note: Optional two-position discharge dampers
in Option AU12 or AU14 fit in the discharge air opening. The
damper motor fits inside the downturn cabinet. See field wiring
instructions in Paragraph 36.
Width of Cabinets (not
Model
Series
CRGB and
RPB S ize
w/Chilled
Water Coil
inches mm inches mm inches mm inches m m
Cabinet
curb )
w/DX Coil
Cabinet
75, 100, 125 29-1/8 740 37-1/8 943 98-1/2 2502 121-5/8 3069
150, 175 34-5/8 879 42-5/8 1083 104 2642 127-1/2 3229
200, 225 40-1/8 1019 48-1/8 1222 109-1/2 2781 132-5/8 3369
250, 300 47-1/8 1197 55-1/8 1400 117-3/4 2991 140-7/8 3578
350 53-3/8 1356 61-3/8 1559 123-3/8 3134 146-1/2 3721
400 58-7/8 1495 66-7/8 1698 128-3/4 3270 151-7/8 3858
Form I-XE/CRGB/RPB, Page 6
Front View
Optional
Downturn
Plenum
Cabinet
4-1/4
J
(Discharge Air)
(108)
C
Length of All System
Cabinets (not curb)
w/Cooling
Coil Cabinet
only
4-1/4
(108)
w/Cooling
Coil Ca binet
w/Downturn
C
A
B
Front View
CW Coil
Cabinet with
Horizontal
Discharge
(Option AU2)
C
38-3/8
(975)
15-1/4
(387)
7/8 (22)
Side View
Chilled
Water Coil
Cabinet
Drain Pan
Connection
1 FPVC)
(Inside of Curb Cap)
F
E
(Curb Cap Length)
D
7/8 (22)
Return
Connection
2-1/2 NPT
Supply
Connection
2-1/2 NPT
G
Coil Vent
1/2 NPT
Coil Drain
Connection
1/2 NPT
6-5/8
(168)
Dimensions (inches ± 1/8; mm± 3)
Furnace Size 75, 100,
125
28-1/2 34 39-1/2 47-3/4 53-1/4 58-3/4
inches
mm 724 864 1003 1213 1353 1492
inches 15-1/4 20-3/4 26-1/4 34-1/2 40 45-1/2
mm 387 52 667 876 1016 1156
inches 25-7/8 31-3/8 36-7/8 45-1/8 50-5/8 56-1/8
mm 657 797 937 1146 1286 1426
inches 37-1/8 42-5/8 48-1/8 56-3/8 62 67-3/8
mm 943 1083 1222 1432 1575 1711
inches 40 45-5/8 51 59-3/8 64-7/8 70-3/8
mm 1016 1159 1295 1508 1648 1788
With
inches 64 69-5/8 75 83-3/8 88-7/8 94-3/8
mm 1626 1768 1905 2118 2257 2397
inches 38-1/8 43-5/8 49-1/8 57-3/8 63 68-3/8
mm 968 1108 1248 1457 1600 1737
With
inches 62-1/8 67-5/8 73-1/8 81-3/8 87 92-3/8
mm 1578 1718 1857 2067 2210 2346
inches 19-1/2 22-1/4 25 29-1/8 31-7/8 34-5/8
mm 495 565 635 740 810 879
inches 17-3/8 22-7/8 28-3/8 45-1/8 50-5/8 56-1/8
mm 441 581 721 1146 1286 1426
E
F
A
B
C
D
Without
Downturn
Downturn
Without
Downturn
Downturn
G
J
NOTE: For the length of a system with a cooling coil cabinet, see the
table on the left. Cooling coil cabinet is shipped separately and attached
in the field. See page 10 for roof curb dimensions.
150,
175
200,
225
250,
300
350 400
18
(457)
11-1/4
(286)
(19)
3/4
(19)
3/4
44-1/4
(1124)
5. Clearances
Provide clearance to combustibles as shown in the table. Clearance to
combustibles is defined as the minimum distance from the heater to a
surface or object that is necessary to ensure that a surface temperature
of 90°F above the surrounding ambient temperature is not exceeded.
Clearance is also required to sides of furnace for combustion air space
and for convenient installation and burner control system service.
REQUIRED CLEARANCES
Model Series
(H)XE
(H)RPB,
(H)CRGB
(H)CRGB
* When installed on a roof cu rb on a combustible roof, the roof area enclosed
within the curb must be either ventilated, left open, or covered with noncombustible material which has an "R" value at least 5. 0. See
Top
6"
(152mm )
36"
(915mm )
30' ( 9M) ra dius from center of vent ca p to obstructions
such as w a ll s, para pe t s or cupolas
Sides Bottom
Control Opposite
Width of
furnace
plus 6"
(152mm)
6"
(152mm )
6"
(152mm )
To
Combustibles
3" (76mm) 0
0 * 0
Combustibles
FIGURE 8
To Non-
, page 10.
6. Combustion Air Requirements
6A. Indoor , Gravity-V ented Models XE/HXE
These furnaces are designed to take combustion air from the space in
which the furnace is installed. The air that enters into the combustion
process is vented to the outdoors. Sufficient air must enter the equipment location to replace the air exhausted through the vent system.
Modern construction methods involve the greater use of insulation,
improved vapor barriers and weather-stripping, with the result that
buildings generally are much tighter structurally than they have been in
the past. The combustion air supply for gas-fired equipment can be
affected by these construction conditions because infiltration that would
have existed in the past may not be adequate. Extensive use of exhaust
fans aggravates the situation. In the past the filtration of outside air
assumed in heat loss calculations (one air change per hour) was assumed
to be sufficient. However, current construction methods may now require the introduction of outside air through wall openings or ducts.
Requirements for combustion air and ventilation air depend upon whether
the unit is located in a confined or unconfined space. An "unconfined
space" is defined as a space whose volume is not less than 50 cubic feet
per 1000 BTUH of the installed appliance. Under all conditions, enough
air must be provided to ensure there will not be a negative pressure
condition within the equipment room or space. A positive seal must be
made in all return-air connections and ducts. Even a slight leak can create
a negative pressure condition in a confined space and affect combustion.
W ARNING: These gravity-vented, indoor furnaces
are designed to take combustion air from the space
in which the furnace is installed and are not designed
for connection to outside combustion air intake
ducts. Use of outside air ducts voids the warranty
and could cause hazardous operation. See Hazard
Levels, page 2.
Indoor , Gravity-V ented Furnace Located in a
Confined Space
Do not install a unit in a confined space without providing wall openings leading to and from the space. Provide openings near the floor and
ceiling for ventilation and air for combustion as shown in FIGURE 2,
depending on the combustion air source as noted in Items 1, 2 and 3.
Add total BTUH of all appliances in the confined space and divide by
figures below for square inch free area size of each (top and bottom)
opening.
FIGURE 2 Confined Space: A
space whose volume
(3)
(1)
(2)
is less than 50
(3)
Confined
Space
(1)
(2)
cubic feet per 1000
BTUH of the
installed appliance
input rating
1. Air fr om inside the building - openings 1 square inch free area per
1000 BTUH. Never less than 100 square inches free area for each opening. See (1) in FIGURE 2.
2. Air fr om outside through duct - openings 1 square inch free area per
2000 BTUH. See (2) in FIGURE 2.
3. Air direct from outside - openings 1 square inch free area per 4000
BTUH. See (3) in FIGURE 2.
NOTE: For further details on supplying combustion air to confined
space, see National Fuel Gas Code ANSI Z223.1a (latest edition) 5.3.3.
6B. Combustion Air for Gravity-V ented,
Outdoor Model Series CRGB
Combustion air enters through the screened air intakes located in the
furnace section access doors.
6C. Combustion Air for Power-V ented,
Outdoor Model
Series RPB
The combustion air and flue gas
openings are carefully designed
screened openings located on the
side of the unit just above the control access panel. Location of the
flue opening directly above the air
intake is designed to discourage recirculation of combustion products. See FIGURE 3.
FIGURE 3 - Combustion Air
Intake, Power-V ented
Models
Flue Products
Outlet
Combustion
Air Inlet
6D. Chlorine - All Models
The presence of chlorine vapors in the combustion air of gas-fired heating equipment presents a potential corrosion hazard. Chlorine will,
when exposed to flame, precipitate from the compound, usually freon
or degreaser vapors, and go into solution with any condensation that is
present in the heat exchanger or associated parts. The result is hydrochloric acid which readily attacks all metals including 300 grade stainless
steel.
Care should be taken to separate these vapors from the combustion
process. This may be done by wise location of the furnace with regard
to exhausters or prevailing wind direction. Remember, chlorine is heavier
than air. This fact should be kept in mind when determining installation
locations of heating equipment and building exhaust systems.
7. Suspending/Mounting
7A. Suspending/Mounting Indoor , Gravity-
Vented Models XE/HXE
Location - Before suspending the furnace, check the supporting structure to verify that it has sufficient load-carrying capacity to support the
weight of the unit.
Approximate Net Weight - Indoor Furnaces
Size 75-100 125 150-175 200-225 250-300 350 400
lbs 233 295 332 386 494 515 576
kg 106 134 151 175 224 234 261
W ARNING: A void installing a unit in an extremely
drafty area. Extreme drafts can shorten the life of
the heat exchanger and/or cause safety problems.
Form I-XE/CRGB/RPB, P/N 131782 Rev 5, Page 7
7A. Suspending/Mounting Indoor, Gravity-
Vented Models XE/HXE (cont'd)
WARNING: Unit must be level for proper
operation. Do not place or add additional weight to
a suspended unit. See Hazard Levels, page 2.
Suspending Furnaces
These indoor, packaged furnace/blower systems have four-point suspension. See hanger dimensions in Paragraph 4, FIGURE 1A. At each
suspension point, the unit is factory-equipped with a free-turning, female, 1" (NPT) pipe hanger. Suspend by connecting the pipe hanger to
a 1" threaded pipe. See the suspension method on the left in FIGURE 4.
As an alternative method, the factory-installed pipe hanger may be
removed and the heater suspended as illustrated on the right in FIG-
URE 4.
Standard Assembly
1 Pipe Flange
1 Pipe
Threaded
Socket
FIGURE 4 - Suspension Methods
Installer Replaced Assembly
Washer Nut Assembly
Washer Nut
Assembly
Heater Top
3/8 Rod
(Standard
Assembly
Removed)
Access through
the side panel
Approximate Net Weight (lbs/kg) - Outd oor Systems
(blower and furnace section s on ly)
Size 75, 100 125 150, 175 200, 225 250, 300 350 400
CRGB
Series
RPB
Series
Appro xim ate Net W eight ( lbs/kg) - Optional Coo l ing Co il Cabin et
Size 150, 175 200, 225 250, 300 350 400
DX w ith
Dow nturn
Chilled
Water
Chilled
Water w i t h
Dow nturn
Location - When selecting a location for an outdoor installation, posi-
tion the unit so that the air inlet will not be facing into the prevailing
wind.
When the unit is mounted on a roof over 20 ft (6 M) high, has parapet
walls or obstructions within 30 ft (9.1M), or is subject to winds over 25
mph, installation of a power-vented unit (Model Series RPB) is recommended.
lbs 439 472 510 529 573 624 655
kg 199 214 231 240 260 283 297
lbs -- 482 520 534 588 630 662
kg -- 219 236 242 267 286 300
(includes approximate weight of a coil with 12fpi)
75, 100, 125
lbs 464 551 661 753 848
DX
kg 269 250 300 342 385
lbs 593 689 813 914 1018
kg 269 313 369 415 462
lbs 457 544 654 746 841
kg 207 247 297 338 381
lbs 586 682 806 907 1011
kg 266 309 366 411 459
377
171
497
225
369
167
490
222
Mounting Indoor Furnaces
Indoor packaged systems require six support locations. See FIGURE 5.
All supports must be non-combustible.
FIGURE 5 - Support Locations for Indoor Systems
Airflow
Furnace
Blower Section
Support the unit at each end and where the blower cabinet and
furnace section join. Support at cabinet joint must extend
horizontally supporting both sections.
Section
WARNING: Do not support an indoor/gravityvented system with four corner support legs. The
system requires horizontal support at cabinet joint
as illustrated in FIGURE 5. Bottom clearance to
combustibles must be observed.
7B. Mounting Outdoor Model Series CRGB
and RPB
Rigging - Lifting holes are provided for rigging. Use spreader bars when
lifting to prevent chains or cables from damaging the unit. If the unit is
being mounted on a roof curb, apply caulking to the roof curb prior to
lifting the unit to the roof and setting it on the curb. See FIGURE 8, page
10.
If the system includes an outside air hood and/or a shipped-separate
cooling coil cabinet, attach them after the unit is in place.
If the system includes a cooling coil cabinet, the cooling coil cabinet
must be lifted to the roof separately, set on the roof curb or supports,
and attached to the furnace.
Form I-XE/CRGB/RPB, Page 8
Curb Cap Base
Outdoor systems are equipped with a load bearing curb cap which
forms an integral part of the unit. This curb cap has welded joints and
has a "skirt" which fits over a roof curb to provide a weatherproof
installation. Four holes are provided at the curb cap corners for lifting
the unit. These holes do not interfere with unit weatherproofing. The
curb cap is not designed to be placed directly on the roof surface.
The system may be mounted on an optional roof curb purchased with
the unit, a field-supplied roof curb, or field-supplied supports. If the
system has a downturn plenum and/or a bottom return air opening, a
roof curb is recommended to provide a weatherproof installation as well
as more workable clearances for ductwork. If the unit has an optional
cooling coil cabinet, the cabinet is shipped separately and attached in
the field. The cooling coil cabinet has a curb cap base that "matches and
extends" the length of the system base.
Mounting on Field-Supplied Supports (without a roof curb) - Prior
to installation, be sure that the method of support is in agreement with
all local building codes and is suited to the climate. If considering this
type of installation in snow areas, it is recommended that the 4x4 wooden
rails underneath the system be on cross-support structure at least 12"
higher than the roof surface (see support locations in FIGURE 6B).
Whether the supports are being mounted directly on the roof or being
placed "up" on additional structure, the horizontal length of the system
should be supported by two 4x4 treated wooden rails. Cut the rails to
the appropriate length (Dimension "A") in FIGURE 6A. (NOTE: Although dimensions are included for units with a downturn plenum cabinet, it is strongly recommended that a full roof curb be used on an
installation with a downturn plenum cabinet and/or a bottom return air
duct.)
Space the 4x4 wooden rails (See "B" Dimension, FIGURE 6A) so that
the curb cap "skirt" will fit over the edge of the boards with the rails
setting inside the horizontal length of the curb cap.
If the rails are being laid directly on the roof, position them as shown in
FIGURE 6A. Set the system on the rails, leaving the "ends" underneath
open for ventilation.
FIGURE 6A - Mounting Support Dimensions (inches/mm)
A
Leave both
ends open
for ventilation.
4x4 Treated Lumber
B
Bottom Duct Connections - The blower section and optional downturn plenum have duct flanges for connection to return air and supply
air ducts. Duct opening sizes and curb spacing shown in FIGURE 7 is
for currently manufactured curbs that are available from the system
manufacturer.
FIGURE 7 - Duct Opening Dimensions in Relation to Roof
Curb Option - inches (mm)
1-5/8 (41)
1-5/8 (41)
Standard
Heater
Blower
Package
Model Series CRGB
and RPB Sizes
75, 100,
150, 175 60-5/8" 84-9/16" 103-7/8" 127-7/8" 29-13/16"
200, 225 60-5/8" 84-9/16" 109-3/8" 133-3/8" 35-5/16"
250, 300 60-5/8" 84-9/16" 117-5/8" 141-5/8" 43-9/16"
75, 100,
150, 175 1540mm 2148mm 2638mm 3248mm 757mm
200, 225 1540mm 2148mm 2778mm 3388mm 897mm
250, 300 1540mm 2148mm 2988mm 3597mm 1106mm
60-5/8" 84-9/16" 98-3/8" 122-1/4" 24-5/16"
125
350 60-5/8" 84-9/16" 123-1/8" 147-1/8" 49-1/16"
400 60-5/8" 84-9/16" 128-5/8" 152-5/8" 54-1/2"
1540mm 2148mm 2499mm 3105mm 618mm
125
350 1540mm 2148mm 3127mm 3737mm 1246mm
400 1540mm 2148mm 3267mm 3877mm 1384mm
With Factory-
Installed
and
"A" "A" "A" "A" "B"
Downturn
Plenum
Cabinet
(Option AQ)
With
ShippedSeparate
Cool i n g
Coil
Cabinet
(O ption AU)
With Shipped-
Separate
Cooling Coil
Cabinet with
Downturn
Plenum
(Option AU)
All
Configurations
If the treated wooden rails are not being placed directly on the roof
surface, cross-supports should be placed underneath the rails at the
ends of the unit and at all cabinet "joints" (between the blower cabinet
and the furnace section; between the furnace and the optional downturn
plenum or coil cabinet; and between a coil cabinet and a downturn
plenum). See FIGURE 6B.
FIGURE 6B - Cross-Support Locations
Field
Supplied
Duct
4x4 Treated
Lumber
The field-supplied, weather-resistant cross-support structure must be
adequate for the weight of the system (including air conditioning coil if
applicable), and all cross-supports should run the entire width of the
system supporting the 4x4 wooden rails at the recommended locations.
Mounting on a Roof Curb - Whether using an optional roof curb
available with the system or a field-supplied curb, the curb must be
secure, square and level. The top surface of the roof curb must be
caulked with 1/4" x 1-1/4" sealant tape or two 1/4" beads of suitable
sealant. The unit must be sealed to the curb to prevent water leakage
into the curb area due to wind blown rain and capillary action. Except
for the curb assembly details which are specific to the optional roof
curb available with the system, the information and requirements in
this section apply to all curbs. See FIGURE 8, page 10, and the curb
installation instructions below.
Blower
Cabinet
Furnace
Section
= Cross Support Locations
Field
Supplied
Duct
1-5/8
(41)
1-5/8
(41)
19-1/2
(495)
Return
Duct
1-5/8 (41)
H
Roof Curb
19-1/2
H
(495)
G
Supply
Duct
1-5/8 (41)
1-5/8
(41)
1-5/8
(41)
• 1-5/8" (41mm) is the measurement from duct opening to
inside edge of roof curb.
• Duct openings should be 1" larger than the duct size for
installation clearance.
Model G
Series H With Downturn w/Cooling Coil Cabinet
CRGB and Plenum, Option w/Downturn, Options
RPB Sizes AQ5 or AQ8 AU 11, 12, 13, or 14
75, 100, 17-3/8" 38-5/8" 75-31/32"
125 441mm 981mm 1930mm
150, 175 22-7/8 38-5/8 81-15/32
581mm 981mm 2069mm
200, 225 28-3/8 38-5/8 86-31/32
721mm 981mm 2209mm
250, 300 36-5/8 38-5/8 95-1/4
930mm 981mm 2419mm
350 42-1/8 38-5/8 100-3/4
1070mm 981mm 2559mm
400 47-5/8 38-5/8 106-1/4
1210mm 981mm 2699mm
Roof Curb Assembly and Installation Instructions (Refer to
FIGURE 8, page 10)
Curbs are shipped unassembled. Field assembly and mounting on the
roof are the responsibility of the installer. All required hardware necessary to complete the assembly is supplied.
Before installing roof curb, verify that the size is correct for the
system being installed.
1. Position curb cross rails and curb side rails as illustrated in
FIGURE 8, page 10. If there are two side pieces to a side, fasten
them with splice plates and hardware as illustrated in the splicing
detail drawing. Join the corners as illustrated in the corner detail.
2. Check the assembly for squareness. Adjust the roof curb so that
the diagonal measurements are equal within a tolerance of + or 1/8" (3mm).
3. Level the roof curb. To ensure a good weather tight seal between
the curb cap and the roof curb, the roof curb must be leveled in
both directions with no twist end to end. Shim level as required
and secure curb to roof deck before proceeding with flashing.
4. Install field-supplied flashing.
5. Before placing the unit into position, apply furnished 1/4" x
1-1/4" foam sealant tape to top surface of curb, making good butt
joint at corners. The unit must be sealed to the curb to prevent
water leakage into the curb area due to blown rain and capillary
action.
Form I-XE/CRGB/RPB, P/N 131782 Rev 5, Page 9
7B. Mounting Outdoor Models on a Roof Curb (cont'd)
F
FIGURE 8 Optional Roof Curb
*Optional
Downturn Plenum
Splicing
Detail
Blower
Cabinet
Curb
Cap
A
1-7/8
(48mm)
Roof
Curb
materials, area within curb must be either ventilated, left open, or covered
with non-combustible material which has an "R" value of at least 5.0. If
area within curb is left open, higher radiated sound levels may result.
IMPORTANT: Top surface of curb MUST be sealed. See instructions above.
* Illustration is shown with an Option AQ5 or AQ8 downturn plenum. The system can have a
variety of configurations which affect installation.
• If the system does not have a downturn plenum, the discharge is horizontal.
• Downturn plenum Options AQ5 and AQ8 are factory installed to be lifted to the roof
and set on the roof curb as part of the packaged system.
• If the system has an Option AU2 or AU3 cooling coil cabinet, the discharge is horizontal. If
the system has an AU11, AU12, AU13, AU14 cooling coil cabinet, there is a downturn
plenum with vertical discharge. Options AU2, AU3, AU11, AU12, AU13, and AU14 are
not factory installed. Options AU2, AU3, AU11, AU12, AU13, and AU14 must be
lifted to the roof separately from the packaged system, set on the roof curb, and
attached to the furnace.
Return
Duct
Furnace
For top 4 holes (2 on
each side) at both joints,
Lift Holes
(4 corners)
from inside the curb insert
(4) 5/16 x 1 lag screws
and (4) 5/16 lockwashers.
1-1/2
(38mm)
1-7/8(48mm)
B
D
C
Supply
Duct
1-7/8
(48mm)
16 (406mm)
Curb Section
16
(406mm)
IMPORTANT: Area enclosed
by the roof curb must comply with
clearance to combustible materials.
If roof is constructed of combustible
4
(102mm)
(Inside
of Curb)
For bottom 4 holes (2 on each side) at both
joints, from outside of the curb insert (4)
5/16-18 x 3/4 long cap screws. Attach with
5/16 lockwashers and 5/16-18 hex nuts.
Corner Detail
1-7/8(48mm)
2 x 6 Wood Nailer
1-1/2 x 3 lb
Fiberglass
Flashed by the
installer (flashing must
be under lip of curb)
Typical
Lag Screw
Cabinet
Curb
Detail
Curb Cap Skirt
Counter Flashing
(by installer)
Cant Strip
(by installer)
Roofing Felts
(by others)
Weld, bolt, or lag screw curb to deck structure.
Curb Cap
Roof Curb
2 x 6
Wood
Nailer
Insulation
MUST be sealed
between curb cap
and roof curb
16
(406 mm)
Curb Height
Cap
Screws
Roof Curb Dimensions (inches)
75, 100,
Size
150, 175 200, 225 250, 300 350 400 Size
125
Option CJ1 - Roof Curb for (H)CRGB and (H)RPB
60-5/8 60-5/8 60-5/8 60-5/8 60-5/8 60-5/8
A
24-5/16 29-13/16 35-5/16 43-9/16 49-1/16 54-1/2
B
56-15/16 56-15/16 56-15/16 56-15/16 56-15/16 56-15/16
**
C
**
D
20-9/16 26-1/16 31-9/16 39-13/16 45-5/16 50-13/16
Option CJ2 - Roof Curb for (H)CRGB and (H)RPB with
Installed
84-9/16 84-9/16 84-9/16 84-9/16 84-9/16 84-9/16
A
24-5/16 29-13/16 35-5/16 43-9/16 49-1/16 54-1/2
B
80-13/16 80-13/16 80-13/16 80-13/16 80-13/16 80-13/16
**
C
20-9/16 26-1/16 31-9/16 39-13/16 45-5/16 50-13/16
**
D
** C and D are roof opening
dimensions.
Downturn Plenum Option AQ5 or AQ8
*** Field installed means that the cooling coil cabinet with or without the downturn is factory assembled
and shipped separately. The roof curb is sized to accommodate the complete length of the system. The
Factory-
shipped-separate cooling coil cabinet with or without a downturn must be lifted to the roof separately
from the packaged system, set on the roof curb, and attached to the furnace section (see instructions
beginning on page 38).
Form I-XE/CRGB/RPB, Page 10
75, 100,
125
150, 175 200, 225 250, 300 35 0 400
Option CJ4 - Roof Curb for (H)CRGB and (H)RPB with
Installed***
98-3/8 103-7/8 109-3/8 117-21/32 123-5/32 128-21/32
A
24-5/16 29-13/16 35-5/16 43-9/16 49-1/16 54-1/2
B
94-5/8 100-1/8 105-5/8 113-29/32 119-13/32 124-29/32
**
C
**
D
20-9/16 26-1/16 31-9/16 39-13/16 45-5/16 50-13/16
Cooling C oil Cabine t Option AU2 or AU3
Option CJ5 - Roof Curb for (H)CRGB and (H)RPB with
Installed***
Cooling Cabinet and Downturn Plenum Option AU11,
AU12, AU13, or AU14
122-3/8 127-7/8 133-3/8 141-21/32 147-5/ 32 152-21/32
A
24-5/16 29-13/16 35-5/16 43-9/16 49-1/16 54-1/2
B
118-5/8 124-1/8 129-5/8 137-29/32 143-13/32 148-29/32
**
C
20-9/16 26-1/16 31-9/16 39-13/16 45-5/16 50-13/16
**
D
Field-
ield-
Roof Curb Dimensions (mm)
F
75, 100,
Size
Option CJ1 - Roof Curb for (H)CRGB and (H)RPB
A
B
C
D
A
B
C
D
**, *** See Notes under chart on the bottom of previous page.
1540 1540 1540 1540 1540 1540
1446 1446 1446 1446 1446 1446
**
**
Option CJ2 - Roof Curb for (H)CRGB and (H)RPB with
2148 2148 2148 2148 2148 2148
2053 2053 2053 2053 2053 2053
**
**
150, 175 200, 225 250, 300 350 400 Size
125
618 757 897 1106 1246 1384
522 662 802 1011 1151 1291
Installed
618 757 897 1106 1246 1384
522 662 802 1011 1151 1291
Downturn Plenum Option AQ5 or AQ8
Factory-
75, 100,
125
Option CJ4 - Roof Curb for (H)CRGB and (H)RPB with
Installed***
2499 2638 2778 2988 3128 3267
A
B
C
D
Installed***
A
B
C
D
618 757 897 1106 1246 1384
2403 2543 2683 2893 3033 3173
**
**
522 662 802 1011 1151 1291
Option CJ5 - Roof Curb for (H)CRGB and (H)RPB with
3108 3248 3388 3598 3738 3877
618 757 897 1106 1246 1384
3013 3153 3292 3503 3643 3759
**
522 662 802 1011 1151 1291
**
150, 175 200, 225 250, 300 35 0 400
Cooling C oil Cabine t Option AU2 or AU3
Cooling Cabinet and Downturn Plenum Option AU11,
AU12, AU13, or AU14
Field-
ield-
8. Venting
8A. Gravity-Vented
Indoor Models
XE/HXE
DANGER: Failure to provide proper venting could result in death, serious injury, and/or pr operty damage. This
furnace must be installed with a vent connection and proper vent to the outside of the building. Install vent in
accordance with Part 7, V enting of Equipment, of the National Fuel Gas Code, ANSI Z223.1 (latest edition) or
applicable provision of national, state or local codes. A Canadian installation must be in accordance with the
CSA B149.1 and B149.2, Installation Code for Gas Burning Appliances and Equipment, and applicable local
codes. Also, follow venting recommendations listed below.
Safe operation of any gravity-vented gas-fired equipment requires a properly operating vent system, correct
provision for combustion air (See Paragraph 6), and regular maintenance and inspection. See Hazard Levels,
page 2.
TABLE 1 - Maximum Horizontal Run for Double-Wall Type B
Connector and Double-Wall Type B Vent
Verti cal
Height of
Vent
6' (1.8M )
8' (2.4M )
10' (3.0M)
15' (4.6M)
20' (6.1M)
30' (9.1M)
TABLE 2 - Maximum Horizontal Run for Single-Wall Metal Pipe
Vertical
Height of
Vent
6' ( 1.8M)
8' ( 2.4M)
10' (3.0M)
15' (4.6M)
20' (6.1M)
Venting Requirements - Indoor Models
1. Provide a minimum clearance of 18" (457mm) between the drafthood
relief opening and any obstruction. Do not expose the relief opening to
wind drafts from any source such as from an overhead door or adjacent
air handling equipment.
2. The unit is equipped with a built-in draft diverter, consequently an
external draft diverter MUST NOT be installed in the vent connector or
5" 6" 7" 8"
ft M ft M ft M ft M ft M ft M
6 1.8 6 1.8 6 1.8 6 1.8 6 1.8 6 1.8
8 2.4 8 2.4 16 4.9 16 4.9 16 4.9 16 4.9
10 3.0 16 4.9 20 6.1 20 6.1 20 6.1 20 6.1
16 4.9 16 4.9 30 9.1 30 9.1 30 9.1 30 9.1
20 6.1 30 9.1 30 9.1 30 9.1 30 9.1 30 9.1
20 6.1 40 12.2 40 12.2 40 12.2 40 12.2 40 12.2
5" 6" 7" 8"
ft M ft M ft M ft M ft M ft M
20.620.620.620.620.620.6
5 1.5 5 1.5 10 3.0 10 3.0 10 3.0 10 3.0
5 1.5 10 3.0 15 4.6 15 4.6 15 4.6 15 4.6
5 1.5 10 3.0 15 4.6 20 6.1 20 6.1 20 6.1
N.R. 10 3.0 15 4.6 20 6.1 20 6.1 20 6.1
Furnaces have
the following
vent outlet sizes:
Vent Diameter
Vent Diameter
Model S ize
Flue Collar
Diameter/Configurati on
10" 12"
10" 12"
75 100 125 150, 175 200, 225 250, 300 350, 400
5"
Round
any internal alterations made. Do not install a manual damper or
other fixed restriction in the vent connector.
3. Vent pipe should be a minimum of 26-gauge galvanized steel or
other noncorrosive material. Double-wall, T ype B vent is recommended. Where it is necessary to run the vent pipe through an
exterior wall of combustible materials, a suitable thimble must be
used. The vent pipe shall have a clearance of at least six inches
(152mm) from combustible materials, or as is specified by the
double-wall vent pipe manufacturer.
4. The horizontal vent pipe run should have a uniform rise of at
least 1/4" per foot (6.3mm per 305mm) of horizontal run in the
direction of discharge. The length of the lateral run must not
exceed lengths in the vent tables of the National Fuel Gas Code or
the Canadian Installation Code for Gas Burning Appliances. See
TABLES 1 and 2 on the right.
5. Lateral runs should be supported every six feet (1.8M) using a
non-combustible material, such as strap steel or chain. Do not
rely on the drafthood or heater for support of either horizontal or
vertical vent pipe.
6. Vent connectors serving Category I heaters (heater with non-
positive vent pressure and with a vent gas temperature at least
140°F above its dewpoint) shall not be connected into any portion of a mechanical draft system operating under positive pressure.
7. Where it is necessary to use a long run of vent pipe, or where the
vent pipe is exposed to cold air, condensation within the pipe
may occur. There are two ways to overcome or eliminate this
problem.
(a) Prevent condensation by insulating the pipe so that the temperature of the flue products never drops below 250°F.
6"
Round
Form I-XE/CRGB/RPB, P/N 131782 Rev 5, Page 11
7"
Oval
8"
Oval
8"
Round
10"
Oval
12"
Oval
)
8A. Gravity-Vented Models XE/HXE (cont'd)
Venting Requirements - Indoor Models (cont'd)
(b) Use double-wall, T ype B vent pipe which is recommended for the
reduction or elimination of condensate problems. Where extreme conditions are present and condensate is anticipated, install a trap for collecting condensate.
8. The vent connection may be made into a suitable permanent chimney
or into a gas vent. The effective area of the vent con-nector, gas vent, or
chimney when connected to a single appliance shall not be less than the
area of the appliance drafthood outlet or in accordance with approved
venting methods. The effective area of the gas vent or chimney when
connected to more than one appliance shall not be less than the area of
the largest vent connector plus 50% of the areas of additional vent
connectors or in accordance with approved venting methods.
Minimum permissible height of the vertical vent is five feet (1.5M)
providing no horizontal vent pipe connector is used. If a horizontal
vent connector is necessary, consult TABLES 1 or 2 or the National
Fuel Gas Code or the Canadian Installation Code for Gas Burning
Appliances, for the maximum permissible length of a horizontal pipe
run (vent connector) for a given vertical height of gas vent.
The gas vent or chimney should extend at least three feet (.9M) above
the highest point where it passes through a roof of a building and at
least two feet (.6M) higher than any portion of a building or obstruction within a horizontal distance of ten feet (3M). A suitable weather
cap should be installed on the end of the vent pipe to prevent rain or
snow from entering the open end.
9. If the heater is installed in a space served by a large exhaust fan, be sure
that the exhaust fan does not affect the operation of the heater or the
satisfactory venting of its products of combustion.
If a negative pressure exists, as evidenced by a downdraft, a factory-
designed mechanical motor driven venter (Option CA) should be installed. In severe negative pressure conditions, makeup air equipment
may be necessary.
Optional Power V enting (Option CA)
To install a gravity-vented furnace in an area where horizontal venting is
required or where negative building pressure inhibits gravity venting, install an optional power venter (Option CA). Use only a power venter
provided by the furnace manufacturer and carefully follow the instructions included in the optional venter package. Use the venter adapter
supplied to connect the power venter to the heater. Do not install the
power venter without the venter adapter.
With an Option CA power venter installed, the furnace may be vented
either horizontally or vertically. Do not exceed the maximum vent lengths
shown in the table below. Minimum vent length is 5 ft (1.5M).
Vent Pipe
Diameter
* Reduce the vent pipe lengths as follows for each item: 45° Elbow - 7ft
(2.1M); 90° Elbow - 15ft (4.6M); Reznor® or Breidert Vent Cap - 10ft (3M).
** If the venter outlet is 4", connect a taper-type "enlarger" to the vent
outlet when installing 6" vent pipe.
Maximum* Vent Length (ft or M) for Furnace with Optional
Power Venter (Option CA)
75, 100, 125, 150 175 200 225 250 300 350 400
ft 100 75 50 35 30 15
4"
M30 23151194.6
ft 100** 100** 100 92
6"
M 30** 30** 30
8B. Venting - Gravity-V ented, Out door Model
Series CRGB
The appropriate size of gravity vent cap is supplied with the furnace. The
gravity vent cap requires field installation.
WARNING: This gravity-vented furnace should be
located on a roof or slab with at least 30-foot (9M)
radius between the center of the vent cap and
obstructions such as walls, parapets or cupolas. See
Hazard Levels, page 2.
Form I-XE/CRGB/RPB, Page 12
Model Size
Vent Cap
Size
Extension Required
75, 100 6"
(H)CRGB
125, 175 8" No
225, 250, 300 10"
350, 400 12" Yes (packed inside cap)
Vent Cap Installation Instructions:
IMPORTANT REQUIREMENT
For proper operation of the gravity vent cap, position the
holes so that the solid side panel of the cap will face the
control compartment access panel side of the furnace. See
FIGURE 9B.
1) Furnaces that do not require a Vent Cap Extension
(H)CRGB Sizes 75- 300, align holes and attach the vent cap to the
furnace flue collar with sheetmetal screws. (See Important Requirement above.)
2) Furnaces that require a Vent Cap Extension (packed inside
the vent cap) - See FIGURES 9A and 9B
(H)CRGB Sizes 350 and 400 require a 12" extension to raise the
vent cap above the top of the furnace.
a) Remove the extension from the inside of the cap.
b) Attach the extension to the furnace flue collar --
1) With 3/8" centerline clearance holes at the bottom, wrap
extension around flue collar on the top of the furnace.
2) Align holes in the extension with holes in the flue collar .
3) Secure with #10 1/2" sheetmetal screws.
c) Attach the vent cap to
the extension --
1) Position vent cap into
top of extension.
(See Important
Requirement
above)
2) Align holes and push
cap into extension.
3) Secure with 1/2"
sheetmetal screws.
FIGURE 9B - V ent
FIGURE 9A - V ent Cap
Extension, P/N 20524
Top
Bottom
Vent Cap
2 (51mm)
12
(305mm
3/8
(10mm)
Cap Installation
Vent Opening
Vent Cap
Extension
Control Compartment
Access Panel
Furnace Top
Optional 4-foot (1.2M) Stack Extension for
Outdoor, Gravity Vent Models (Option ZZ)
Outdoor, gravity-vented furnaces that are factory-built with Option
ZZ are designed to release flue gases four feet (1.2M) above the top
of the furnace. A field-provided 4-ft (1.2M) vent extension must be
installed between the top of the furnace and the bottom of the vent
cap. (See FIGURE 9C). Furnaces with Option ZZ (factory-installed
restrictor plus field-provided 4-ft stack) may be installed adjacent to
fresh air inlet(s) when local code requires that release of flue gases be
above an adjacent fresh air inlet that is not part of the furnace.
FIGURE 9C - Optional Stack Extension applies only to
5 Vent Cap,
P/N 110052
5 dia Flue Pipe
4
(1.2M)
5 dia
90° Elbow
18 (457mm) Straight Pipe
Oval Adapter Assy
Combustion Air Intake
Support angles for flue pipe.
Recommended size is
1/2x1/2, 20 gauge
Furnaces with Suffix "Z" in their Model No.
FIGURE 11B - Installation of the V ent Cap (included in the
option package) and the field-supplied Piping and Supports
Three guy wires, spaced 120°
apart, fastened to the vent
cap collar and furnace top
with sheetmetal screws.
Gravity Vent Cap
4 ft
(1.2M)
8C. Venting - Power Vented, Outdoor Models
Locate power-vented furnaces so that flue discharge is not directed at
fresh air inlets.
Flue Gas and
Combustion Air
Openings
These screened openings are located on the side of the furnace
just above the control access
panel. See FIGURE 10. The position of these openings discourages recirculation of combustion
products and provides for furnace operation in all normal
weather conditions.
FIGURE 10 - Flue Outlet,
Power-V ented Furnaces
Flue Products
Outlet
Combustion
Air Inlet
9. Condensate Drain
9A. Indoor Models XE/HXE
Condensate can form in the heat exchanger of furnaces installed as makeup
air units or when installed downstream from a cooling coil. Under these
conditions, a drain flange, Option CS1, may be installed on the furnace
bottom as shown in FIGURE 12. When using Option CS1, seal all
corners and the four square holes in the bottom pan edge.
FIGURE 12 - Condensate Drain, Option CS1 (P/N 31765)
Optional Vertical Flue Discharge (Option CC3)
These power vented furnaces are certified with four feet (1.2M) of
vertical pipe attached as shown in FIGURES 11A and 11B. The dis-
tance is measured from the top of the unit to the bottom of the vent cap.
The option package includes the 5" vent cap, the adapter assembly and
the seal plate. The vent pipe and supports are field supplied. The
straight pipe connecting the furnace to the 90° elbow must be at
least 18" (457mm) in length.
Optional vertical vent piping provides compliance with local codes
that require either 10-ft (3M) horizontal or 4-ft (1.2M) vertical clearance between the flue outlet and fresh air intake of the heating system
and/or the building.
1) Remove and discard
the louvered
discharge grill.
2) Using venter seal
plate as a template,
drill holes. Attach
venter seal plate and
oval adapter
assembly with 3/8"10 sheetmetal
screws.
FIGURE 11A - Installation of Adapter for Optional Vertical
Flue Discharge (Option CC3, P/N 45021)
Oval Adapter Assy,
PN/ 103025
Venter Seal Plate,
P/N 43446
Bottom of the Furnace Casing
#10 x 1-1/4 Bolt and Nut
3/4 Pipe Waste Nut
Seal holes in bottom pan. Terminate drain outside of
building. Periodic cleaning of the condensate collector and
disposal system is required.
Gasket
9B. Outdoor Model Series CRGB and RPB
A hole is provided in all four corners of the furnace bottom to drain off
condensation to the outside of the curb cap to the roof.
10. Duct Connections
Requirements and Suggestions for Connecting
and Installing Ducts
• Type of Ductwork - The type of duct installation to be used de-
pends in part on the type of construction of the roof (whether wood
joist, steelbar joist, steel truss, pre-cast concrete) and the ceiling
(whether hung, flush, etc.).
• Ductwork Material - Rectangular duct should be constructed of
not lighter than No. 26 U.S. gauge galvanized iron or No. 24 B & S
gauge aluminum.
• Ductwork Structure - All duct sections 24 inches or wider, and
over 48 inches in length, should be cross broken on top and bottom
and should have standing seams or angle-iron braces. Joints should
be S and drive strip, or locked.
Form I-XE/CRGB/RPB, P/N 131782 Rev 5, Page 13
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