Friedrich SH20, SH14 User Manual

ROOM AIR

CONDITIONERS

USE, CARE, AND

INSTALLATION

MANUAL

Models

SH14

920-024-04 (10/01)

SH20

TABLE OF CONTENTS

OPERATION AND CARE INSTRUCTIONS

PART 1 General Instructions............................................................. Page 3

PART 2 Filter Information .................................................................. Page 4

PART 3 Maintenance Checklist......................................................... Page 4

PART 4 Special Features ................................................................... Page 5

PART 5 Control Panel ........................................................................ Page 6

PART 6 Underwriters Laboratories................................................... Page 6

INSTALLATION INSTRUCTIONS

SECTION I Electrical Requirements....................................................... Page 7

SECTION II Unpacking the Unit ............................................................... Page 9

SECTION III Chassis Wiring and Preparation ......................................... Page 9

SECTION IV Shell Preparation .................................................................. Page 10

SECTION V Shell Installation ................................................................... Page 11

A. Sash Window................................................................... Page 11

B. Through the Wall ............................................................. Page 14

SECTION VI Chassis Installation .............................................................. Page 17

WARRANTY ......................................................................................................... Page 19

Spanish Translation............................................................................................ Page 21

French Translation.............................................................................................. Page 41

Page 2

WELCOME TO YEARS OF ECONOMICAL COMFORT

WITH YOUR NEW FRIEDRICH HAZARDGARD

ROOM AIR CONDITIONER

PART 1 — GENERAL INSTRUCTIONS

Your new Friedrich has been carefully engineered and manufactured to give you many years of dependable,
efficient operation, maintaining a comfortable temperature and humidity level. Many extra features have been
built into your unit to assure quiet operation, the greatest circulation of cool, dry air, and the most economic
operation.

Here are some suggestions to help you use your new Friedrich most efficiently:

1. Carefully read and follow the installation instructions.

2. Your Friedrich HazardGard room air conditioner is electrically grounded for your safety. The power supply

must also be grounded and must be installed in accordance with NEC Article 501. The branch circuit rating is shown
on the nameplate for each model.

3. Make sure the unit is the right capacity for the area to be cooled. Too little capacity makes the unit work too hard,
using more electricity than needed and increasing wear. Too much capacity is also hard on the unit as it will cycle on
and off too rapidly, and cannot control humidity as well.

4. When you first turn on your Friedrich, set the thermostat to its coldest position to cool the room. When the
desired temperature is reached, turn the thermostat control toward the "warmer" position until you hear a click and the
compressor goes off. The thermostat will then cycle the compressor to maintain the selected temperature.

5. Clean the filter frequently (See General Maintenance).

6. Do not block the air flow to and from the unit. Make sure the louvers are directed to give even distribution of air

throughout the room. Caution: If air is directed into a restricted area such as behind a bed or into a corner, this may
cause the unit to cycle on and off rapidly, which could damage your unit.

7. A dirty filter or improperly set controls can affect the cooling ability of the unit.

8. If cooling is weak and you have verified that the filter is clean and the controls are properly set, the unit may be low

on refrigerant, and you should call your Friedrich service provider to check the unit.

9. Keep blinds, shades and drapes closed on the sunny side of the room being cooled.

10. Proper insulation helps your unit maintain the desired inside temperature.

11. Whenever possible, shade west-facing windows with awnings.

12. Keep window coverings away from the unit to provide free air flow.

Page 3

PART 2 — FILTER INFORMATION

The filter in your Friedrich removes dust, pollen and other impurities from the air as they are drawn through the unit. The
filter is permanent and reusable, and has a germicidal treatment which is not affected by washing.

A clogged, dirty filter reduces the air flow through the unit and reduces its efficiency. You should check the filter every
seven to ten days, depending on the amount your unit is used. Clean the filter regularly.

Filter Retainer Clips

The filter can be removed for cleaning by opening the
front of the unit and releasing the filter from its retaining
clips.

PART 3 — MAINTENANCE CHECKLIST

WON’T COOL

If the unit operates, but doesn’t cool, check to see that the controls are properly set. Inspect the filter and
clean it thoroughly, if needed.

WON’T RUN

If the unit does not operate at all, check that the power supply connections are tight. Check for blown fuses or
tripped circuit breakers. Replace blown fuses with the proper size time-delay fuse. The nameplate on the unit
shows the proper fuse size. After restoring power, wait three minutes before restarting the unit.

INSIDE COIL FREEZES UP

Your Friedrich HazardGard is designed not to freeze with outdoor temperatures as low as 45°F (7°C). Freezing
should only occur when the outside air is damp and below 45°F (7°C). If the indoor coil should ice over while
cooling, set the thermostat to the warmest position until the ice on the coil is gone. Setting the thermostat to a
slightly warmer position will probably keep ice from forming on the coil. A dirty filter will contribute to icing.

CLEANING

The front grille of your Friedrich, as well as the complete cabinet may be cleaned with warm water and a mild
detergent. The coils and base pan should be cleaned periodically for the most efficient operation. We suggest you
call your Friedrich dealer for this service.

LUBRICATION

Fan motors are factory lubricated and sealed. No lubrication is required.

Page 4

PART 4 — HAZARDGARD SPECIAL FEATURES

HAZARDGARD UNIT

SPECIAL FEATURES

! Permanent Split-Capacitor, totally

enclosed fan motor to assure efficient
operation even under adverse electrical
conditions. Motor has a special
stainless steel shaft to resist corrosion
and a hermetically sealed overload for
arc-free operation.

! High capacity compressor with internal

hermetically sealed overload.

! Solid-state printed circuit board

insulated against corrosion on
conductor paths. Contains transient
voltage suppressor to protect controls
against transient voltage spikes.
Provides solid state switches for arc­free operation.

! Copper tubing/aluminum fin coils.

! Galvanized steel cabinet and base pan,

all bonderized.

! Slide-out chassis for easy installation in

window or through–the–wall.

! Extra insulation inside, including

completely insulated plenum chamber
for quieter, more efficient cooling.

! Entire unit test run in environmental

chamber before crating.

! Eight–way air flow control for uniform

air circulation.

! Hot gas bypass low ambient control to

permit operation without freezing at
outdoor ambient temperatures as low
as 45°F (7°C).

! Environmentally sealed on-off switch

and gold plated contacts in thermostat
for corrosion resistance.

! Electrodeposited epoxy primer and

alkyd enamel, both oven-baked for an
attractive, long-lasting finish.

Friedrich Air Conditioning quality has been proven by more than twenty-five years of

successful experience from the Gulf of Mexico to the searing sands of the Arabian desert.

! Patented electronic control circuit.

! Condensate drain with exclusive

mosquito trap.

! 15 amp circuit with time-delay fuse

required. Accommodates direct wiring.

! Long lasting 3/8" (10 mm) thick air filter,

germicidally treated, easily removed for
cleaning.

Page 5

PART 5 — CONTROL PANEL

FUNCTION CONTROL (POWER)

This switch is a double pole, single throw toggle
switch.

ON - Turns everything on.
OFF - Turns everything off.

TEMPERATURE CONTROL

The knob at the bottom is the thermostat which is a
cross ambient type used to maintain the desired
comfort level. The thermostat reacts only to a change
in temperature at the bulb location - turn the knob
clockwise to set cooler, counterclockwise for warmer.

PART 6 — EXCLUSIVE !

Friedrich leads again with the first UL Listed Room Air Conditioners designed to cool living
quarters and other enclosures situated in hazardous locations where specific volatile
flammable liquids or gases are handled or used with enclosed containers or systems.

Friedrich HazardGard
Code, Article 500 requirements for Class I, Division 2, Groups A, B, C, D Hazardous locations
and are the only air conditioners UL Listed for this application.

®

room air conditioners are designed to meet the National Electrical

THIS UNIT IS LISTED BY UNDERWRITERS LABORATORIES FOR USE IN
CLASS I, DIVISION 2, GROUPS A, B, C, D HAZARDOUS LOCATIONS.
Operating Temperature Code: T3B.

Page 6

INST ALLA TION INSTRUCTIONS

Models SH14 and SH20

NOTE: THIS MANUAL INCLUDES INSTALLATION INSTRUCTIONS FOR BOTH WINDOW MOUNT AND THROUGH-

THE-WALL INSTALLATIONS

SECTION I: ELECTRICAL REQUIREMENTS

ALL FIELD WIRING MUST MEET THE REQUIREMENTS OF THE NATIONAL ELECTRICAL CODE (ANSI/NFPA 70)
ARTICLE 501.

THE FIELD-PROVIDED CIRCUIT PROTECTION DEVICE (HACR CIRCUIT BREAKER OR TIME DELAY FUSE) MUST
NOT EXCEED THE AMPACITY INDICATED ON THE PRODUCT NAMEPLATE.

IMPORTANT: Before you begin the actual installation of your air conditioner, check local electrical codes and the
information below.

Your air conditioner must be connected to a power supply with the same A.C. voltage and frequency (hertz) as marked on
the data plate located on the chassis. Only alternating current (A.C.), no direct current (D.C.), can be used.

An overloaded circuit will invariably cause malfunction or failure of the air conditioner; therefore, it is extremely important
that the electrical power is adequate. Consult your dealer or power company if in doubt.

The following instructions are for HAZARDGARD models and cabinet sizes listed below.

GROUPS CABINET SIZE (H x W x D)

SMALL CHASSIS SH14 15–15/16" x 25–15/16" x 27–3/8"

(405 mm x 660 mm x 695 mm)

MEDIUM CHASSIS SH20 17–15/16" x 25–15/16" x 27–3/8"

(455 mm x 660 mm x 695 mm)

Model Number Plug Type Circuit Rating

Time Delay Fuse

SH14 Junction Box 250V-15 Amp

SH20 Junction Box 250V-15 Amp

Page 7

HAZARDGARD WINDOW MOUNT

INSTALLATION HARDWARE

ITEM DESCRIPTION QTY.

No.

SHELL MOUNTING PARTS

1 SUPPORT BRACKET 2
2 SCREW, 10 - 24 x 1" HEX HEAD 4
3 10 - 24 FLAT WELDNUT 4
4 SCREW, SHEET METAL #12A x 2" 7

WINGBOARD ANGLE MOUNTING

5 WINGBOARD ANGLE, TOP 1
6 WINGBOARD ANGLE, SIDE 2
7 SCREW, SHEET METAL #8A x 3/8" 2

WINGBOARD MOUNTING PARTS

8 WINGBOARD (MASONITE) - (NOT SHOWN) 1

9 "J" TYPE SPEED NUT 4
10 WINGBOARD CLIP
11 SCREW. #8A x 1/2" PHILLIPS TRUSS HD. 4

(SPRING STEEL) 4

ITEM # 2

ITEM # 3

WINDOW SEALING

12 SEALING GASKET (VINYL) 1
13 WINDOW SEAL GASKET (DARK FOAM) 1
14 CHASSIS SEAL GASKET (LIGHT FOAM) 1

ITEM # 7

ITEM # 9

ACCESSORY DETAIL

ITEM # 14

ITEM # 4

ITEM # 11

ITEM #10

ITEM # 13

ITEM # 12

Page 8

ITEM # 1

ITEM # 6

ITEM # 5

NOT TO SCALE

SECTION II

UNPACKING THE UNIT

STEP 1. Remove decorative plastic return air grille to a safe area away from the unit.

STEP 2. Remove the installation hardware, wingboard and two (one light colored and one dark colored) gaskets from

beneath the unit, and place them in a safe area away from the unit.

STEP 3. Remove the chassis retainer by removing the far right screw in the basepan (see Figure A); save this screw to

reattach the chassis retainer after installation (Step 15). Also, remove and discard the two retainer

screws and plastic bushings located at the rear of the unit.

STEP 4. While an assistant holds the cabinet stationary, use the hand pull at the front of the base pan (see Figure A) to pull

the chassis out of the cabinet. Remove white foam blocks used to restrain the compressor during shipment.
Inspect basepan for dislodged white blocks, and remove. Do not remove any other foam.

FIGURE A

HAND PULL

CHASSIS WIRING AND PREPARATION

1 JUNCTION BOX FRIEDRICH PN: 613-893-00
2 MOUNTING LEGS RACO INC. PN: 5324-0
2 LEG SCREWS
2 HOLE COVERS
1 GROUND SCREW
BOX COVER FRIEDRICH PN: 613-892-00
GASKET RACO INC. PN: 5173-0
2 SCREWS
1 SHEET METAL SCREW

FAR RIGHT

SCREW

SECTION III

PROVIDED HARDWARE

CABINET

CABINET

STEP 3

HAND PULL

CHASSIS
RETAINER

STEP 1. Remove the junction box, cover and screw (above items) from the shipping position underneath the fan motor.

Install one junction box mounting leg in the upper left position facing the rear of the junction box.

STEP 2. Remove and discard the plastic b ushing from the conduit connector on the side panel of the control compartment.

Strip the black wires only, approximately 1/2 inch (13 mm).

STEP 3. Insert all wires (2 black, 1 green) into the box and thread the box onto the conduit connector until tight. Bac k of f

counter clockwise until the junction bo x is vertical with the mounting leg at the upper–right position facing the bo x
opening. Be sure that the shell can fit between this box and the chassis.

Page 9

SECTION IV

SHELL (CABINET) PREPARATION:

It will be necessary to relocate the sill plate of the cabinet 2" back from its shipping position, and the shell guides 4" forward, to
the forward-most hole in the shell rail. Discard the chassis retainer wire disconnected in Section II, Step 3. The junction box
mounting leg from Section VI, Step 1, and the field-installed conduit will retain the chassis in the shell.

IF THIS INSTALLATION IS FOR A SASH WINDOW – With the wide flange and pilot holes of the sill plate forward, put the
screws/nuts in the rear holes of the sill plate and third shell hole from the front (the center of three square holes). Anchor the
side angles (Item #6) by engaging the tabs at each end of the sill plate with the bottom loops of the side angle. Engage the
tabs at each end of the top angle (Item #5) with the top loops of the side angle. Install tw o (2) screws (Item #7) to secure the
top angle tabs and the side angle to the rear-most holes in the side of the cabinet (See Figure B, below).

IF THIS INSTALLATION IS THROUGH A WALL – Turn the sill plate end to end so that the wide flange with pilot holes will
be over the wall header (towards the rear) and two inches from the front of the cabinet. Bend the tabs into the channel of the
sill plate, put the screws/nuts in the front holes of the sill plate and into the second shell hole from the front. Use one bolt on
each side to secure the sill plate to the cabinet. (See Figure C, below.)

FIGURE B

FIGURE C

Cabinet

Cabinet

BEFORE

Top Angle (Item #5)

Screw

(2 required)

Sill Plate Tab

AFTER

Side Angle
(Item #6) 2
required

8A x 3/8" long screw (Item #7) 2
required

Loop

Detail B-1

Detail B-2

Tab

Loop

Turn sill plate
end to end

Page 10

Sill Plate

Retainer, Chassis

(This side only)

DETAIL 2

Bend tabs down

NOTE: HOLES
MOVED TO BACK SIDE

Nut (2
required)

DETAIL 1

Position the sill plate into the
cabinet with the sill plate holes
to the back. Align the plate 2
inches from the front of the
cabinet and secure it with a nut
and bolt in each end.

SECTION V — SHELL INSTALLATION

(A) SASH WINDOW INSTALLATIONS

SHELL (CABINET) INST ALLA TION – STANDARD SASH WINDOWS

STEP 1. Check the window sill and frame to be sure they are in good condition and firmly anchored to the wall. Repair if

necessary.

STEP 2. CABINET MOUNTING: Raise the lower window sash 1/4" more than the height of the cabinet. Carefully slide

the cabinet through the open window until the sill plate channel rests behind the window sill and the top support
angle rests against the window (See Figure D). Center the cabinet side to side and drill three (3) 5/32" dia. pilot
holes into the window sill using the holes in the cabinet sill plate as a guide. Install three (3) #12A x 2" long scre ws
(Item #4) (See Figure D).

FIGURE D

Top Support Angle

Center cabinet side to
side in window

Drill 3 5/32" pilot holes and install 3
#12A x 2" long screws (Item #4)

Pull window sash down behind
the top support angle

Side Support Angle

Window sill

Locate the sill plate guide channel
just back of the window sill.

FIGURE E

#12A x 2" Screw (Item #4)

A 1" x 4" or 2" x 4" spacer should be used between the
wall and bracket when installed on aluminum, asbestos
or vinyl siding.

3/8" (10 mm)
Down slope

Support
Bracket

Support
Bracket
(Item #1)

10 - 24 Flat Weldnut (Item #3)

10 - 24 x 1" Hex Head Screw (Item #2)

STEP 3. OUTSIDE SUPPORT MOUNTING: Assemble the support brackets (Item #1) to the bottom rails of the cabinet

with four (4) 10-24 1" long scre ws (Item #2) and f our (4) 10–24 flat nuts (Item #3). Adjust the support brac kets to
bring the bottom pads in contact with the wall surface. (See Figure E.)

A 1" x 4" or 2" x 4" SPACER SHOULD BE USED BETWEEN THE WALL AND THE SUPPORT BRACKETS WHEN
INST ALLED ON ALUMINUM OR VINYL SIDING). Drill 5/32" (4 mm) dia. pilot holes, and secure the brackets to the wall

with two (2) #12A x 2" long screws (Item #4). Adjust the support brack ets to provide an approximate 3/8" (10 mm) down
slope towards the outside f or drainage. Tighten all screws. (See Figure E).

Page 11

The illustrations below show a standard frame construction installation as well as some suggested ways of
adapting the support bracket to thick walls and large stone ledges.

TYPICAL INSTALLATION SILL PLATE

Figure 1

Figure 3

10 - 24 Screw
10 - 24 Flat Nut

3/8" (10 mm)
Slope down

#12A x 2" Sheet metal screw

1" x 2" or 2" x 4" spacer between wall
and bracket should be used on
aluminum, asbestos or vinyl siding

Stone ledge

3/8" (10 mm)
Slope down

#12A x 2" Sheet metal
screw

2" x 4" Spacer

Figure 2

Cut
Here

Discard shaded area

Figure 4

3/8" (10 mm)
Slope down

Stone ledge
Outside wall

Cut to fit Dimension "A" and
bend down to for a vertical leg

Stone ledge

3/8" (10 mm) Slope down

Straighten tab to lay flat along

the bottom rail of the shell.
Secure the longest side of the
bracket to the shell.

Adjust in or out to rest on the ledge

STEP 4. CUT WINGBOARD PANELS: Measure and cut the wingboard panels from the supplied masonite (Item #8) to fit

the spaces between the side window channels and the sides of the cabinet (See Figure F).

NOTE: AFTER CUTTING PANELS, MAKE A TRIAL TEST TO SEE IF THEY FIT THE SPACE WITH ABOUT
1/8" CLEARANCE BEFORE GOING TO STEP 5.

FIGURE F

Measure distance "B" to the inside of
the channel on each side

Cut here and discard the center
waste material

Wingboard

Subtract 1/8" (3 mm) from
dimension "B" and measure
from the edge of the
wingboard (Item # 8), mark
and cut with a saw.

Page 12

FIGURE G

"J" type speed nut (item #9)
2 required

Spring steel clip (item #10)
2 required

Cut wingboard panel

Center the hole in the speed
nut over the slot in the
wingboard panel

Cut edge

Slide clip over cut edge of wingboard panel.

STEP 5. ASSEMBLE CLIPS TO WINGBO ARD P ANELS: Assemble "J" type speed n uts (Item #9) and spring steel clips

(Item #10) to the edges of the cut wingboard panels (See Figure G).

FIGURE H

Secure the side wingboard panels to the
side angles with four (4) #8 x 1/2" long
screws (Item #11), two on each side.

Top of cabinet

Place wingboard panel in window jam to
compress the springs inside the runners, and
swing the panel into place indicated by the dotted
line.

Window jam

SECTION A - A

STEP 6. INSTALL SIDE WINGBOARD PANELS: Be sure that the cabinet has been secured to the window sill and the

outside support bra ckets have been installed as shown in Figures D and E on Page 11. Raise the window sash
and install the right and left side wingboard panels (See Figure H).

STEP 7. INSTALL WINDO W SEALING GASKETS: Measure and cut the vinyl window seal gask et (gre y color , Item #12)

to fit the width of the window and install as shown in Figure I. Pull the window sash down behind the gasket.
Measure and cut the dark foam window seal gasket (Item #13) and install it between the upper glass panel and
the top part of the lower sash (See Figure I).

FIGURE I

Vinyl window seal gasket Item #12)

Foam window seal gasket (Item # 13)

Lower window sash

Vinyl window seal gasket
Top wingboard angle

SECTION B - B

NOTE: FOR REASONS OF SECURITY AND SAFETY, THE CUSTOMER MUST PROVIDE A MEANS OF PREVENTING

THE WINDO W FROM OPENING.

STEP 8. When possible, caulk the outside of the installation with industrial type caulking to pre vent air and water leaks.

Page 13

SECTION V — SHELL INSTALLATION

(B) THROUGH–THE–WALL INSTALLATIONS

WALL PREPARATION:
The maximum wall thickness permissible without special construction is determined by the model size to be installed. THE
OUTSIDE CABINET CONDENSER AIR INTAKE LOUVERS MUST NOT BE BLOCKED BY EXTENDING INSIDE THE
WALL AREA. Observe the maximum wall thickness shown as dimension "A" in Figure J.

SPECIAL INSTRUCTIONS FOR EXTRA THICK WALLS: For installation in walls exceeding the maximum thickness

shown as dimension A, the following suggested construction may apply. (See Figure J).

FIGURE J

15 1/8 " (384 mm)
Maximum wall thickness

Condenser
Air intake
Louvers

Top view showing beveled sides for
air intake. Wall below unit must
also be beveled to assure proper tilt
angle.

EXTRA THICK WALL CONSTRUCTION

2" (51 mm) minimum
Both sides

Condenser air
Intake louvers

STEP 1. CHECKING WIRING AND PLUMBING: Check all wiring and plumbing inside and outside the wall to be sure

none will be broken where the hole is to be cut.

STEP 2. HOLE CONSTRUCTION: Depending on the size of the unit to be installed, layout the hole dimensions in

accordance with the chart below (See Figure K). Cut and frame in the hole to the finished dimensions. Use
2" x 4" material for framing and follow the suggested typical installations in Figure L, M or N on Page 15.

NOTE: IF THE WALL CONSTRUCTION IS TYPICAL FRAME OR 2 X 4 STUDDING WITH BRICK OR STONE
VENEERS, LOCATE THE HOLE NEXT TO ONE OF THE STUDS. FOR MASONRY , CONCRETE OR CINDER BLOCK
WALLS, LOCATE THE HOLE FOR CONVENIENCE.

FIGURE K

HOLE SIZE REQUIREMENTS

FINISHED SMALL MEDIUM

DIMENSION CHASSIS CHASSIS

A 16-3/16" 18-3/16"
B 26-3/16" 26-3/16"

NOTE: THESE DIMENSIONS ARE FOR FINISHED HOLE SIZE

Page 14

FIGURE L FRAME W ALL CONSTRUCTION

Caulk all sides

Weather cabinet

Shim the void space at the top and
sides with wood as required

FIGURE M BRICK VENEER CONSTRUCTION

Weather cabinet

Caulk all sides

FIGURE N SOLID MASONRY CONSTRUCTION

Caulk all sides

Cabinet

Shim void spaces at top and sides
with wood as required

Mortar

Page 15

STEP 3. Slide the cabinet into the hole far enough to allow the guide-channel of the sill plate to contact the inside wall

surface (See Figure O).

STEP 4. Drill three (3) 5/32" dia. pilot holes through holes in sill-plate into the framing and install three (3) #12 x 2" long

screws (Item #4) (See Figure O).

FIGURE O TYPICAL INSTALLATION

Trim moulding

Screw #12A x 2" long

Use 3.

Sill plate

Guide channel

Inside wall

Surface

Caulk all sides air tight

3/8" (10 mm) slope down

Note: Support brackets may be omitted from
through-the-wall installations if the cabinet is
secured as follows. Drill 2 holes in each side
and install 4 fasteners (2 each side).
Use #12A x 2" (51 mm) screws, toggle bolts or
expansion anchor bolts as shown in Step 5.

Support brackets (Item 1) (See note above)

Screw #12 x 2" long, use one in each bracket.
Drill 5/23 (4 mm) dia. pilot holes.

NOTE: ALTERNATE FASTENERS WHICH MAY BE USED FOR SECURING THE SILL PLATE IN THE W ALL, AND THE

SUPPORT BRACKETS TO THE OUTSIDE WALL ARE NOT FURNISHED, BUT ARE AVAILABLE AT A LOCAL
HARDWARE STORE.

MOLLY OR TOGGLE BOLT EXPANSION ANCHOR BOLT

STEP 5. Drill two (2) 5/32" (4 mm) dia. pilot holes in each side at the locations shown (Figure O) and install four (4) #12 x

2" screws (Item #4). If the hole construction in Step 2 provides a sturdy mount with solid v ertical studs, no support
brack ets are required. The installation must support the weight of the unit plus an additional weight of 400 pounds
(185 kg) on the rear of the cabinet. The support brack ets may be used for through-the-w all installations as sho wn
in Figure O, for additional support.

STEP 6. If desired, trim around the cabinet on the room side with a suitable frame molding furnished by the installer (See

Figure O).

Page 16

SECTION VI

CHASSIS INSTALLATION

STEP 1. Slide the chassis into the cabinet stopping approximately 3" from full insertion. Stuff the chassis seal gasket (Item

#14) one inch deep between the chassis and the cabinet (See Figure P). Make sure that the gasket is behind
the conduit connector (furthest from you). Push the chassis into the shell the remaining distance so that the

plastic front shrouds the front edge of the shell. Fasten the junction box mounting foot to the shell with the sheet
metal screw .

NOTE: Field wiring must be provided to this junction box in accordance with NATIONAL ELECTRIC CODE

ARTICLE 501. Field and equipment grounds are to be terminated at the post in the junction box with
the green screw provided. Equipment power leads are to be connected with the field supply by means
of wire nuts (not provided). Install the gasket and cover plate onto the junction box.

FIGURE P

CHASSIS SEAL

GASKET

Page 17

STEP 2. Be sure that the filter is in place then install the return air grille (See Figure Q). The top of the return air grille can

be butted against the bottom of the discharge plen um and then snapped at the bottom cupport clips, or the
bottom of the grille can be snapped into the grille clips and then engaged below the discharge plenum.

FIGURE Q

Discharge Air Plenum

DETAIL 2

Slot

Tab

Slot

Tab

Return Air Grille

DETAIL 1

DETAIL 1

DETAIL 3

Return air grille

Latches

Latch

DETAIL 4

Side view
(Cutaway)

STEP 3. You have completed your installation. Conduct a review of y our installation to insure that the unit is safely and

securely installed. Ref er to the "OPERATING GUIDE" section of this manual to test the operation of your unit.

WARNING: – EXPLOSION HAZARD –

SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR

Page 18

CLASS I, DIVISION 2.