C E R T I F I E D
Model FT30-CV and FT45-CV Gas-Fired,
Fan-Assisted, Unit Heaters with Option
AV6 (common venting) and Model FT45-
LN with Option AL2B (classroom unit)
INST ALLATION FORM RGM 433-CV/LN (V ersion A)
Obsoletes RGM 433-CV/LN
APPLIES TO: Installation/Operation/Service
Models FT 30-CV, FT45-CV, and FT45-LN are certified for residential and commercial/industrial
installations. These instructions apply only to Models FT30-CV and FT45-CV designed for common
venting and Model FT45-LN designed for classroom application.
WARNING: DO NOT use these instructions when installing standardly equipped Model FT unit
heaters. Check the Model No. on the rating plate to verify the -CV or -LN suffix.
Table of Contents
Installation and Operation ........................................................... Paragraphs 1-18 ........... Pages 1-15
Check Installation and Start-Up.......................................................Paragraph 19 ......... Pages 15-16
Service/Maintenance/Troubleshooting ...................................... Paragraphs 20-31 ......... Pages 16-20
Index ..................................... Page No.
Burner Orifices ........................................ 17
Burner Removal ....................................... 17
Burners .................................................... 15
Check Installation and Start-Up............... 15
Circuit Board ...................................... 13, 18
Circuit Board LED Codes ................... 13, 19
Clearances................................................... 3
Combustion Air .......................................... 3
Combustion Air Proving Switch .............. 13
Confined Space .......................................... 4
Dimensions ................................................ 3
Electrical Supply and Connections .......... 12
Fan ........................................................... 18
Fan Motor ................................................ 13
REFERENCES: Replacement Parts, Form RGM 728
Index ..................................... Page No.
Flame Rollout Switch .................................. 18
Gas Piping and Pressures............................ 11
Gas Valve .................................................... 13
General.......................................................... 1
Hazard Intensity Levels ................................ 1
Heat Exchanger........................................... 18
High Altitude Operation ................................ 2
Ignition System ..................................... 13, 17
Installation Codes ......................................... 2
Left Side Controls .......................................... 4
Limit Control .............................................. 18
Location (Heater).......................................... 2
Gas Conversion, Form RGM 432/433-GC
Index ....................................... Page No.
Louvers, Vertical (Option Kit) ...................... 2
Maintenance................................................ 16
Manifold Pressure ........................................ 12
Service ........................................................ 16
Suspending.................................................... 4
Thermostat ................................................... 13
Troubleshooting .......................................... 19
Uncrating and Preparation ............................ 2
Vent System Maintenance ........................... 18
Venter Motor ............................................... 18
Venting .......................................................... 4
Warranty ....................................................... 2
Wiring Diagram .......................................... 14
FOR YOUR SAFETY
What to do if you smell gas:
• Do not try to light any appliance.
• Do not touch any electrical switch;
do not use any phone in your
building.
• Immediately call your gas supplier
from a neighbor's phone. Follow
the gas supplier's instructions.
• If you cannot reach your gas supplier, call your fire department.
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.
FOR YOUR SAFETY
Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
HAZARD INTENSITY LEVELS
1. DANGER: Failure to comply will result in severe personal injury or
death and/or property damage.
2. W ARNING: Failur e to comply could result in sever e personal injury
or death and/or property damage.
3. CAUTION: Failure to comply could result in minor personal injury
and/or property damage.
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 only to the
unit heater models with the factory-installed options shown below . If the heater
is not equipped with one of these options, do not use these instructions.
Model Equipped With Type Fuel Vent Air Deli very
FT 30-CV
FT 45-CV
FT 45-LN
Option AV6
Option AV6
Option AL2B
Form RGM 433-CV/LN, Mfg No. 177854 (Revision 1), Page 1
Indoor,
Suspended
Unit Heater
Gas-
Fired
Fan
Assisted
Propell er Fan
General (Cont'd)
Model FT heaters are design-certified by the Canadian Standards Association (CSA) to ANSI Z83.8a and CGA 2.6a for industrial/commercial installations in the United States and Canada. Models FT 30,
45 and 60 are approved by the Canadian Standards Association to
IAS 10-96 for residential installations in both the United States and
Canada. All heaters are available for use with either natural or propane gas. The type of gas, the firing rate, and the electrical characteristics are on the unit rating plate.
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 1.
WARNING: Should overheating occur, or the
gas supply fail to shut off, shut off the manual
gas valve to the appliance before shutting off the
electrical supply .
W ARNING: Do not use this appliance if any part
has been under water. Immediately call a
qualified service technician to inspect the
appliance and replace any gas control which has
been under water.
1. Installation Codes
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 (latest edition). A Canadian installation must be in accordance with the CAN/
CGA B149.1 and B149.2 Installation Code for Gas Burning Appliances and Equipment. 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 Commercial Installations (Aircraft
Hangars/Repair Garages/Parking Garages)
Installations in aircraft hangars should be in accordance with ANSI/
NFP A No. 409 (latest edition), Standard for Aircraft Hangars; in public
garages in accordance with ANSI/NFP A No. 88A (latest edition), Standard for Parking Structures; and for repair garages in accordance with
ANSI/NFPA No. 88B (latest edition), Standard for Repair Garages.
ANSI/NFPA-88 (latest edition) specifies overhead heaters must be
installed at least eight feet (2.4M) above the floor. In Canada, installations in aircraft hangars should be in accordance with the requirements of the enforcing authorities, and in public garages in accordance with CAN/CGA B149 codes.
ANSI/NFP A 409 (latest edition) specifies a clearance of ten feet (3.0M)
to the bottom of the heater from the highest surface of the top of the
wing or engine enclosure of whatever aircraft would be the highest to
be housed in the hangar, and a minimum clearance of eight feet (2.4M)
from the floor in other sections of aircraft hangars, such as the offices, and shops which communicate with areas used for servicing or
storage. The heaters must be located so as to be protected from damage by aircraft or other objects such as cranes and movable scaffolding. In addition, the heaters must be located so as to be accessible for
servicing, adjustment, etc.
Form 433-CV/LN, Page 2
2. Warranty
Refer to the limited warranty information on the Warranty Card in the
"Owner's Envelope".
Warranty is void if ...
a. Wiring is not in accordance with the diagram furnished with the
heater.
b. The unit is installed without proper clearance to combustible ma-
terials.
c. The heater is connected to a duct system or if the air delivery
system is modified.
3. Uncrating and Preparation
This unit was test operated and inspected at the factory prior to crating
and was in operating condition. If the heater has incurred any damage in
shipment, file a claim with the transporting agency .
Check the rating plate for the gas specifications and electrical characteristics of the heater to be sure that they are compatible with the gas and
electric supplies at the installation site.
Read this booklet and become familiar with the installation requirements
of your particular heater. 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. If the installation includes optional vertical louvers, install
them before the heater is suspended. Follow the instructions included in
the option package; option package is shipped separately.
4. High Altitude Operation
If the heater is being installed at an altitude between 2000 and 5000 ft
(610 to 1525M), check the rating plate to determine what must be done
to prepare the heater for high altitude operation.
Check the rating plate, determine which circumstance below applies,
and follow the instructions.
• If the altitude range on the rating plate agrees with the altitude at
the site, no further action is required. Proceed with the installation.
• If the altitude range on the rating plate reads "Sea Level" and the
altitude at the site is between 2000 ft and 5000 ft (610M to 1525M),
install the heater and follow the instructions in Paragraph 12 to derate by manifold gas pressure adjustment.
NOTE: This heater is not designed for installation at an elevation above
5000 ft (1525M).
5. Unit Heater Location
Suspend the heater so that it is a minimum of five feet (1.5M) above the
floor. Other clearances are listed in Paragraph 7.
WARNING: If touched, the vent pipe and certain
internal heater surfaces that are accessible from
outside the heater will cause burns. Suspend the
heater a minimum of 5 ft (1.5M) above the floor.
For best results, the heater should be placed with certain rules in mind.
In general, a unit should be located from 8 to 12 feet (2.4-3.7M) above
the floor. Units should always be arranged to blow toward or along exposed wall surfaces, if possible. Where two or more units are installed in
the same room, a general scheme of air circulation should be maintained
for best results.
Suspended heaters are most effective when located as close to the working zone as possible, and this fact should be kept in mind when determining the mounting heights to be used. However, care should be exercised to avoid directing the discharged air directly on the room occupants.
Partitions, columns, counters, or other obstructions should be taken
into consideration when locating the unit heater so that a minimum
quantity of airflow will be deflected by such obstacles.
When units are located in the center of the space to be heated, the air
should be discharged toward the exposed walls. In large areas, units
should be located to discharge air along exposed walls with extra units
provided to discharge air in toward the center of the area.
At those points where infiltration of cold air is excessive, such as at
entrance doors and shipping doors, it is desirable to locate the unit so
that it will discharge directly toward the source of cold air from a distance of 15 to 20 feet (4.6-6.1M).
CAUTION: Do not locate the heater where it may
be exposed to water spray, rain or dripping water.
6. Dimensions
Figure 1 - Dimensions (inches and mm) of Models FT30-CV and FT45-CV with Option AV6 and Model FT45-LN
with Option AL2B
28-5/8 (727)
Right Side View
Front
View
12-1/8
(308)
Standard control
side is the right side;
units may be converted to left side
controls in the field.
Adjustable Louvers
6-9/16
(167)
4" Diameter Flue Outlet
5-13/16
(148)
Rear
View
A
4 (102)
3-1/16
(78)
Field Wiring A = 115V/60Hz/1Ph
Connections B = Thermostat Wires (24V)
B
1/2" NPT Gas
Connection
7. Clearances and Combustion Air
Units must be installed so that
the clearances in the table are
provided for combustion air
space, inspection and service,
and for proper spacing from
combustible construction.
This fuel-burning heater must
be supplied with the air that enters into the combustion process
and is then vented to the outdoors. Sufficient air must enter the equipment location to replace that exhausted through the heater vent system.
In the past, the infiltration of outside air assumed in heat loss calculations (one air change per hour) was assumed to be sufficient. However,
current construction methods using more insulation, vapor barriers,
tighter fitting and gasketed doors and windows, weather-stripping, and/
or mechanical exhaust fans may now require the introduction of outside air through wall openings or ducts.
Required Clear ances
FT 30 and 45
Top 1 25
Flue Connec t or 6 152
Access Panel 18 45 7
Non-Access Side 1 25
Bottom 1 25
Rear 18 457
inches mm
Access Panel
21-1/4 (540)
25-9/16 (540)
9/16
16 (406)
(14)
3/8-16 Cage
Nuts for Unit
Suspension
17-15/16
(456)
Air Flow
Top View
The requirements for combustion 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 condi-
tions, enough air must be provided to ensure there will not be a negative pressure condition within the equipment room or space. For specific requirements for confined space installation, see Paragraph 8.
WARNING: These fan-assisted unit heaters are
designed to take combustion air from the space
in which the unit is installed and are not designed
for connection to outside combustion air intake
ducts. Connecting outside air ducts voids the
warranty and could cause hazardous operation.
See Hazard Levels, Page 1.
Form RGM 433-CV/LN, Mfg No. 177854 (Revision 1), Page 3
8. Combustion Air Requirements
for a Heater 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
below.
Figure 2 Confined Space:
A space whose
volume is less
than 50 cubic feet
per 1000 BTUH
Confined
Space
of the installed
appliance input
rating
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.
1. Air from 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 from 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 a confined
space, see the National Fuel Gas Code ANSI Z223.1a (latest edition).
9. Left Side Controls
All units are factory built with controls on the right side (as viewed
when facing the heater discharge). If the installation location requires
that the controls be on the left side, follow the steps below to change
the control side.
o
1. Turn the heater over (180
the front and rear remain the same. (Notice that the "bottom" panel,
which is now on the top of the heater, has four suspension holes.)
2. Reverse the Louver Position -- Remove the screws holding the
louver frame. Turn the louver assembly (180o). Reinstall the assembly so that the louvers will direct the air downward with the heater
in its new position.
3. Turn the access panel so that the labels are in an upright position.
Re-attach the panel.
). Turn so that the sides are opposite but
10. Suspending the Heater
Before suspending the heater, check
the supporting structure to be used to
verify that it has sufficient load-carrying capacity to support the weight
of the unit.
When the heater is lifted for suspension, support the bottom of the
heater with plywood or other appropriately placed material. If the bottom is not supported, damage could occur.
The heater is equipped with four-point suspension. Two 3/8"-16
threaded nut retainers are located on each side of the heater. See Dimensions in Paragraph 6 and illustration in Figure 3.
WARNING: Suspend the heater only from the
threaded nut retainers. Do not suspend from the
heater cabinet panels.
Form 433-CV/LN, Page 4
Net Weight
Siz e lbs
30 60 27
45 66 30
kg
WARNING: Unit must be level for proper operation.
Do not place or add additional weight to the suspended
heater. Hazard Levels, page 1.
Figure 3 Suspension
3/8",
Threaded
Rod
Add a 3/8" nut
to lock the
hanger rod to
the heater
Be sure that the 3/8"
threaded hanger rods
are locked to the heater
as illustrated.
Recommended
maximum hanger rod
length is 6 feet (1.8M).
11. Venting
Venting must be in accordance with these instructions or the National
Fuel Gas Code Z223.1 or CAN/CGA B149.1 and B149.2, Installation
Code for Gas Burning Appliances and Equipment, and all local codes.
Local requirements supersede national requirements.
Model FT30-CV and Model FT45-CV heaters and Model FT45-LN
heater require a vertical vent. Common vertical venting is permitted
when installed according to the instructions in Section 11B. Venting
instructions are divided into two sections - Section 11A covers venting
a heater as a single Category I appliance; Section 11B covers common
venting with another Category I appliance. Select and follow the instructions in the section that apply to the application.
WARNING: Use only the venting instruction
section that applies to the installation. Do not
combine any requirements. Use these venting
instructions only with Model FT heaters with
-LN or -CV in the Model No.
1 1A. Requirements and Instructions when
Venting as a Single Category I
Appliance
A vertical vent is required; vent as a Category I appliance.
• Vent Pipe - Use 4" Type-B double-wall vent pipe in the entire vent
system.
• Vent Pipe Length/Height (See Figure 4)
Model Vertical Horizontal Vent
FT Height Connector Length
Size (H) (L)
30 or 45 6 ft (1.8M) 0 - 6 ft (0 - 1.8M)
30 or 45 8 ft (2.4M) 0 - 8 ft (0 - 2.4M)
30 or 45 10 ft (3M) 0 - 10 ft (0 - 3M)
30 15 ft (4.6M) 0 - 5 ft (0 - 1.5M)
45 15 ft (4.6M) 0 - 15 ft (0 - 4.6M)
45 20 ft (6.1M) 0 - 10 ft (0 - 3M)
45 25 ft (7.6M) 0 - 5 ft (0 - 1.5M)
NOTE: The information in the table above is used by permission (100199-5) of the copyright holder, American Gas Association, all rights
reserved.
Figure 4 - Venting a single
Model FT45-LN as a Category
I appliance
(NOTE: Same requirements
apply if venting an FT30-CV or
FT45-CV into a single vent.)
H
L
4", T ype-B Double Wall V ent Pipe
• Vent System Joints
Follow the pipe manufacturer's instructions for joining Type B doublewall vent pipe sections.
For joining the double-wall pipe to the heater outlet collar and the vent
cap, follow the instructions below:
Instructions for attaching double-wall (T ype B) vent pipe to the
heater outlet
Hardware and Sealant Required: 3/4" long sheetmetal screws; and
a tube of silicone sealant
1) Look for the "flow" arrow on the vent pipe; attach according to
the arrow . Slide the pipe so that the heater outlet is inside the doublewall pipe.
2) Drill a hole through the pipe into the outlet collar. (Hole should
be slightly smaller than the sheet metal screw being used.) Using a
3/4" long sheet metal screw, attach the pipe. Do not overtighten.
Repeat, drilling and inserting two additional screws evenly spaced
(120° apart) around the pipe.
3) Use silicone sealant to seal any gaps. If there is an annular opening, run a large bead of sealant in the opening. The bead of sealant
must be large enough to seal the opening, but it is not necessary to
fill the full volume of the annular area.
• V ent System Support
Lateral runs should be supported every six feet using a non-combustible material, such as strap steel or chain. Do not rely on the heater for
support of either horizontal or vertical vent pipe.
• V ent Terminal
The vent terminal should be a minimum of six feet (1.8M) from adjoining buildings. The vent terminal should be six inches higher than
the anticipated snow depth but no less than two feet above the roof.
Where the vent extends through the roof, a clearance thimble is required when the flue pipe extends through combustible materials; follow the requirements of the double-wall pipe manufacturer.
Terminate with a vent cap that meets the requirements of the doublewall pipe manufacturer.
11B. Requirements and Instructions for
Common V enting (Refer to Figures 5A
and 5B and Common Vent Tables 1-4)
DANGER: This heater is designed for a Category
I common venting application. Common venting
meaning when two or more Category I appliances
are vented into a single vertical vent. The installer
must comply with the venting requirements listed
in this section. DO NOT install this heater with a
horizontal vent. V erify that any appliances being
commonly vented with this heater are designed
for Category I common venting.
Common Venting Terms and Requirements
Common vents must be vertical. The common vertical portion may
be either a Type B double-wall vent, a masonry chimney lined with a
Type-B or listed liner, or an interior clay-tile-lined masonry chimney.
These tables are for chimneys and vents not exposed to the outdoors
below the roof line (a Type B vent or listed chimney lining system
passing through an unused masonry chimney is not considered to be
exposed to the outdoors). If using a clay-tile-lined exterior chimney,
consult the National Fuel Gas Code (latest edition) for specific requirements.
The vent system may include combinations of vent connectors of different pipe sizes and either single-wall or double-wall metal pipe provided all of the appropriate tables permit all of the selected sizes and
types of pipe. If both single-wall and double-wall pipe are used in vent
connectors in the system, use the single-wall table to size the common
vent. Model FT heaters require double-wall pipe connectors.
NOTE: The Common Vent Tables in this section are used by permission (1001-99-5) of the copyright holder, American Gas Association,
all rights reserved. For larger vent sizes or information not provided
here, consult the National Fuel Gas Code (latest edition).
n Vent Connector
Definition - The individual length of vent pipe from the heater and
other appliance (example: water heater) to the common vent
n Vent Connector Rise
Definition - Vertical distance measurement from the heater or appliance outlet to the centerline where the vent gas streams come together
(See Figures 7A and 7B).
Model FT-CV or -LN V ent Connector and Vent Connector Rise
Requirements-
Pipe - Use 4" diameter, Type B double-wall pipe.
Length - Maximum horizontal length is 6 ft (1.8M).
Because Model FT requires a 4" double-wall vent connector, use
the 4" Diameter/Fan Assist column in Table 1A if venting into a
double-wall common vent or Table 3A if venting into a masonry
chimney to determine permissible vent connector rise and vent length.
(NOTE: The table for 4" double-wall vent connector does not show
30,000 BTU input for the shorter vent heights. For the Model FT30,
use the "smallest" BTU listed, allowing for a maximum 1-ft connector rise.)
Other Category I Appliance(s) Vent Connector and Vent Connector Rise Requirements - Select the table that matches the instal-
lation and determine the allowable vent connector size and rise. The
maximum vent connector horizontal length in feet is 18" times the
diameter in inches of the vent connector pipe, as follows:
Form RGM 433-CV/LN, Mfg No. 177854 (Revision 1), Page 5
11. Venting (cont'd)
1 1B. Requirements and Instructions for Common Venting (Refer to Figures 5A and 5B and
Common V ent Tables 1-4) (cont'd)
n Vent Connector Rise (cont'd)
Maximum Length of the Vent Connector of Other Category I
Appliance
Connector Diameter Maximum Horizontal Length
3" 4-1/2 ft (1.4M)
4" 6 ft (1.8M)
5" 7-1/2 ft (2.3M)
6" 9 ft (2.7M)
7" 10-1/2 ft (3.2M)
8" 12 ft (3.7M)
9" 13-1/2 ft (4.1M)
10" 15 ft (4.6M)
n Common Vent
Definition - The vertical portion of a Type B double-wall vent or
tile-lined masonry chimney into which two or more vent connectors attach
Common Vent Height
n
Definition - Vertical distance measurement from the highest draft-
hood outlet or flue collar to the vent cap or chimney outlet of the
common vent (See Figures 5A and 5B).
Add the BTUH's of the appliances and use the Common Vent Capacity Tables to determine permissible common vent size and height
combination. If either of the connector vents in the system are singlewall vent pipe, use a single-wall vent pipe table.
Model FT-CV or FT-LN Common V ent Height Requirements
NOTE: Because Model FT-CV and -LN is fan assisted, the col-
umn Nat/Nat does not apply. Depending on the other appli-
ance, use either Fan+Nat or Fan+Fan.
Type B Double-W all Pipe - Depending on the type of vent con-
nector, use Table 1B or Table 2B
Masonry Chimney lined with T ype B or a Listed Liner (see note
under table) - Depending on the type of vent connector , use T able
1B or Table 2B
Interior Tile-lined Masonry Chimney - Depending on the type
of vent connector, use Table 3B or Table 4B
Figure 5A - Typical
Common V ent
Application of a unit
heater and a water
heater using a Type
B Double-Wall
H
Type B
Double-Wall
Common V ent
Common V ent
R2
Model FT
-CV or -LN
4" T ype B Double-Wall
Vent Connector -
Maximum horizontal
Vent
Connector
of another
Category I
appliance
length is 6 ft (1.8M)
Category I Appliance
(water heater)
Figure 5B - Typical Common Vent Application of a unit
heater and a water heater venting into a Tile-lined
Masonry Chimney
Tile-lined
Masonry
Chimney
H
R1
Key to Figures 5A and 5B AND/OR Tables (pages 7-10)
H (appears in illustrations and tables) = Common Vent Height
Definition - The common vent height is the vertical distance
measurement from the highest drafthood outlet or flue collar
to the vent cap or chimney outlet of the common vent.
R (appears in tables only) = Vent Connector Rise
Definition - The vent connector rise is the vertical
distance measurement from each heater or appliance
outlet to the centerline where the vent gas streams come
together.
R1 (appears in illustrations only) = Vent Connector Rise (R
above) of the Category I Appliance in Figures 5A and
5B IMPORTANT: Be certain that the appliance being
vented with the heater is one that is permissible for common
Category I venting.
R2 (appears in illustrations only) = Vent Connector Rise (R
above) of Model FT30-CV, FT45-CV, or FT45-LN in
Figures 5A and 5B (NOTE: In Figure 5B, there is no
R2 because the vent connector rise is zero.)
Form 433-CV/LN, Page 6
Model FT
-CV or -LN
4", T ype B
Double-Wall
Vent Connector -
Maximum
horizontal length
is 6 ft (1.8M)
R1
Water
Heater
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