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Page 7

AC13 SERIES

NOTE − Keep the height of extenders short enough to
ensure a sturdy installation. If it is necessary to extend
further, consider a different type of field−fabricated
framework that is sturdy enough for greater heights.

The inside diameter of the 4" (101.6mm) piping is
approximately 0.25" (6.35mm) greater than the
pre−installed feet on the unit. Devise a shim that will take up
the space and hold the extenders onto the feet during this
procedure. Small strips of 0.125" (3.175mm) thick
adhesive foam may be used. One or two small 1"
(25.4mm) square strips should be adequate to hold the
extender in place.

ELEVATING THE UNIT (LARGER−BASE UNITS)

Unlike the small−base units which use round support feet,
the larger−base units are outfitted with elongated support
feet as illustrated in figure 11 which uses a similar method
for elevating the unit.

If additional elevation is necessary, raise the unit by
extending the length of the unit support feet. This may be
achieved by using a 2" SCH 40 female threaded adapter.
The specified coupling will fit snuggly into the recessed
portion of the feet. Use additional 2" SCH 40 male threaded
adaptors which can be threaded to the female threaded
adaptors to make additional adjustments to the level of the
unit.

LEG DETAIL

BASE

2" (50.8MM) SCH 40
FEMALE THREADED
ADAPTER

Figure 11. Elevated Slab Mounting using Feet

Extenders (Larger Base Units)

ROOF MOUNTING

Install unit at a minimum of four inches above the surface
of the roof. Care must be taken to ensure weight of unit is
properly distributed over roof joists and rafters. Either
redwood or steel supports are recommended.

Removing and Installing Panels

CAUTION

To prevent personal injury, or damage to panels,
unit or structure, be sure to observe the following:

While installing or servicing this unit, carefully stow
all removed panels out of the way, so that the panels
will not cause injury to personnel, nor cause
damage to objects or structures nearby, nor will the
panels be subjected to damage (e.g., being bent or
scratched).

While handling or stowing the panels, consider any
weather conditions, especially windy conditions,
that may cause panels to be blown around and
battered.

REMOVING PANELS

Remove the louvered panels as follows:

1. Remove two screws, allowing the panel to swing open

slightly as illustrated in figure 12.

NOTE − Hold the panel firmly throughout this procedure

2. Rotate bottom corner of panel away from hinge corner

post until lower three tabs clear the slots as illustrated
in figure 12, detail B.

3. Move panel down until lip of upper tab clears the top

slot in corner post as illustrated in figure 12, detail A.

DETAIL A

Detail C

DETAIL B

ROTATE IN THIS DIRECTION;

THEN DOWN TO REMOVE

PANEL

SCREW

HOLES

LIP

PANEL SHOWN SLIGHTLY
ROTATED TO ALLOW TOP
TAB TO EXIT (OR ENTER) TOP
SLOT FOR REMOVING (OR
INSTALLING) PANEL.

IMPORTANT! DO NOT ALLOW PANELS TO
HANG ON UNIT BY TOP TAB. TAB IS FOR
ALIGNMENT AND NOT DESIGNED TO
SUPPORT WEIGHT OF PANEL.

Figure 12. Removing/Installing Louvered Panels

(Details A, B and C)

Содержание AC13 -018

Страница 1: ...List 1 AC13 Air Conditioner Units 1 Unit Dimensions 2 General Information 3 Recovering Refrigerant from Existing System 3 Removing Existing Outdoor Unit 5 Positioning New Outdoor Unit 6 Removing and I...

Страница 2: ...IT SUPPORT FEET AC13 BASE WITH ELONGATED LEGS H SUCTION LINE CONNECTION LIQUID LINE CONNECTION TOP VIEW RUN CAPACITOR CONTACTOR DISCHARGE LINE LIQUID LINE CONNECTIONS PARTS ARRANGEMENT AC13 A B C D E...

Страница 3: ...Rockwell Harness Scale minimum Fully insert the wrench into the valve stem recess Service valve stems are factory torqued from 9 ft lbs for small valves to 25 ft lbs for large valves to prevent refrig...

Страница 4: ...ppropriately sized wrench to turn an additional 1 12 turn clockwise as illustrated in figure 1 Operating Ball Type Service Valve To Access Ball Type Service Port A service port cap protects the servic...

Страница 5: ...system charge recovery into the outdoor unit Outdoor unit s high or low pressure switches if applicable when tripped can cycled the compressor OFF Compressor can stop pumping due to tripped internal...

Страница 6: ...roperty Install the unit as far as possible from the property line When possible do not install the unit directly outside a window Glass has a very high level of sound transmission For proper placemen...

Страница 7: ...unit at a minimum of four inches above the surface of the roof Care must be taken to ensure weight of unit is properly distributed over roof joists and rafters Either redwood or steel supports are re...

Страница 8: ...table an uneven surface ONE BRACKET PER SIDE MIN FOR EXTRA STABILITY 2 BRACKETS PER SIDE 2 FROM EACH CORNER CONCRETE SLAB USE PLASTIC PLASTIC ANCHOR HOLE DRILL 1 4 PLASTIC SLAB NO PLASTIC ANCHOR HOLE...

Страница 9: ...ed to meter flow is 1 4 in diameter and copper INSTALLING LINE SET Line Set Isolation This reference illustrates procedures which ensure proper refrigerant line set isolation Installation of line set...

Страница 10: ...to braze the line set to the new air conditioner unit Figure 18 is provided as a general guide for preparing to braze the line set to the air conditioner unit CAUTION Brazing alloys and flux contain m...

Страница 11: ...r unit s service valves Removing Indoor Unit Metering Device Remove the existing HCFC 22 refrigerant flow control orifice or thermal expansion valve from the indoor coil REPLACEMENT PARTS If replaceme...

Страница 12: ...AC13 ENGINEERING HANDBOOK See the AC13 Engineering Handbook for approved indoor outdoor match ups applicable fixed orifice and TXV kits and application information Figures 23 and 24 illustrates the ty...

Страница 13: ...e provided Teflon rings around the stubbed end of the TXV and lightly lubricate the connector threads and expose surface of the Teflon ring with refrigerant oil 3 Attach the stubbed end of the kit val...

Страница 14: ...nly 3 Open the high pressure side of the manifold to allow HCFC 22 into the line set and indoor unit Weigh in a trace amount of HCFC 22 A trace amount is a maximum of two ounces 57 g refrigerant or th...

Страница 15: ...er of HCFC 22 refrigerant Open the manifold gauge valve 1 to 2 psig in order to release the vacuum in the line set and indoor unit 10 Close manifold gauge valves and shut off the HCFC 22 cylinder and...

Страница 16: ...strain relief and to maintain separation of field installed low and high voltage circuits Start Up and Charging Procedures IMPORTANT If unit is equipped with a crankcase heater it should be energized...

Страница 17: ...djust the fan speed See indoor unit instructions to in crease decrease fan speed Changing air flow affects all temperatures recheck temperatures to confirm that the temperature drop and DT are within...

Страница 18: ...c sheet to restrict the airflow through the outdoor coil to achieve pressures from 200 250 psig 1379 1724 kPa Higher pressures are needed to check charge Block equal sections of air intake panels and...

Страница 19: ...refrigerant If refrigerant is added or removed verify charge using the Subcooling Method MORE or LESS 018 024 030 036 042 048 060 TEMP 6 3 3 6 3 3 8 4 4 12 6 7 5 2 8 6 3 3 7 3 8 Temperature of air en...

Страница 20: ...erature VAP _________ 10 Subtract to determine superheat SH VAP _____ SAT ______ SH ______ 11 Record the wet bulb temperature air entering indoor coil WB _______ 12 Record outdoor ambient temperature...

Страница 21: ...73 80 27 175 77 186 77 190 73 201 79 195 78 185 76 193 76 85 29 189 79 200 79 205 75 215 81 209 80 198 77 208 78 90 32 203 81 216 81 221 77 231 82 224 81 213 79 224 80 95 35 218 82 232 82 237 79 247 8...

Страница 22: ...cal power to the unit at the discon nect switch before performing any maintenance The unit may have multiple power supplies 3 Reusable Filter Many indoor units are equipped with reusable foam filters...

Страница 23: ...e to cooling mode to maintain predetermined comfort settings Temperature Indicator The temperature indicator displays the actual room temperature PROGRAMMABLE THERMOSTATS Your Lennox system may be con...

Страница 24: ...n Maximum Fuse or Circuit Breaker Electrical Connections Tight Indoor Filter clean Supply Voltage Unit Off Indoor Blower RPM S P Drop Over Indoor Dry Outdoor Coil Entering Air Temp Discharge Pressure...

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