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INSTALLATION INSTRUCTIONS
A7AC13F
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to
the potential for personal injury or death.
WARNING
Installation and servicing of air conditioning equipment
can be hazardous due to internal refrigerant pressure
and live electrical components. Only trained and
qualified service personnel should install or service
this equipment. Installation and service performed by
unqualified persons can result in property damage,
personal injury, or death.
WARNING
ELECTRICAL SHOCK HAZARD!
Risk of electrical shock. Disconnect all
remote power supplies before installing
or servicing any portion of the system.
Failure to disconnect power supplies
can result in property damage, personal
injury, or death.
WARNING
Sharp metal edges can cause injury. When installing
the unit, use care to avoid sharp edges.
Charging information is given on the charging procedure
sticker on the unit access panel.
215 Metropolitan Drive
West Columbia, SC 29170
508490-01
This manual must be left with the homeowner for future reference.
NOTICE
Single Stage Air Conditioner
Table of Contents
General ........................................................................1
Installation ...................................................................4
Refrigeration Piping .....................................................5
Electrical Wiring .........................................................15
Start-Up .....................................................................16
Homeowner Information ............................................17
Maintenance ..............................................................18
Wiring Diagram ..........................................................19
General
Read this entire instruction manual, as well as the
instructions supplied in separate equipment, before
starting the installation. Observe and follow all warnings,
cautions, instructional labels, and tags. Failure to comply
with these instructions could result in an unsafe condition
and/or premature component failure.
These instructions are intended as a general guide only
for use by qualified personnel and do not supersede any
national or local codes in any way. The installation must
comply with all provincial, state, and local codes as well as
the National Electrical Code (U.S.) or Canadian Electrical
Code (Canada). Compliance should be determined prior
to installation.
This A7AC13F outdoor air conditioner with all-aluminum
coil is designed for use with R-454B refrigerant only.This
unit must be installed with an approved indoor air handler
or coil.
*P508490-01*
Issue 2417
(P) 508490-01
Page 1 of 22
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Summary of Contents for Allied Air A7AC13F
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Page 1: Table Of Contents
Code (Canada). Compliance should be determined prior to installation. NOTICE This A7AC13F outdoor air conditioner with all-aluminum coil is designed for use with R-454B refrigerant only.This Charging information is given on the charging procedure unit must be installed with an approved indoor air handler sticker on the unit access panel. -
Page 2: Refrigerating System
WARNING CAUTION • The appliance shall be stored in a room without Under no circumstances shall potential sources of continuously operating ignition sources (for example: ignition be used in the searching for or detection of open flames, an operating gas appliance, or an refrigerant leaks. - Page 3 IMPORTANT IMPORTANT When breaking into the refrigerant circuit to make When removing refrigerant from a system, either for repairs – or for any other purpose – conventional servicing or decommissioning, it is recommended procedures shall be used. However, for flammable good practice that all refrigerants are removed safely.
- Page 4 NOTE – R-454b is a A2L refrigerant. The system installation must meet the following parameters based upon total refrigerant charge (line set included). TAmin (Total minimum conditioned area)is the minimum allowable conditioned area based upon the total system charge at sea level. Values must be multiplied by altitude adjustment factor at installed altitude. Qmin table refers to minimum airflow requirements during refrigerant leak mitigation by the refrigerant detection system, based upon total system charge.
- Page 5 STEP 1 SETTING THE UNIT - Clearances Notes Service clearance of 30 in. (762 mm) must be maintained on one of the sides adjacent to the control box. Clearance to one of the other three sides must be 36 in. (914 mm). Clearance to one of the remaining two sides may be 12 in.
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Page 6: Step 2 Refrigerant Piping
Flush the existing line set per the following instructions. For more information, refer to the Installation and Service IMPORTANT Procedures manual available on AlliedConnect™. CAUTION - DO NOT attempt to flush and re-use existing This model is designed for use in check / expansion line sets or indoor coil when the system contains valve systems only. - Page 7 Secondary Sensor Installation If secondary refrigerant sensor is required, it shall be WARNING mounted as follows: Upflow Applications: Mounted on an unused side furnace Polyolester (POE) oils used with R-454B refrigerant return air connection at least 9 inches above the floor and absorb moisture very quickly.
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Page 8: Installation
LINE SET IMPORTANT — Refrigerant lines must not contact structure. INSTALLATION REFRIGERANT LINE SET — INSTALLING Line Set Isolation - The following illustrations are VERTICAL RUNS (NEW CONSTRUCTION SHOWN) examples of proper refrigerant line set isolation: NOTE - Insulate liquid line when it is routed through areas where the surrounding ambient temperature could become higher than the REFRIGERANT LINE SET —... - Page 9 STEP 2 – REFRIGERANT PIPING – Removing Existing Indoor Metering Device TYPICAL EXISTING FIXED ORIFICE TYPICAL EXISTING EXPANSION VALVE REMOVAL REMOVAL PROCEDURE PROCEDURE (UNCASED COIL SHOWN) (UNCASED COIL SHOWN) STUB END TWO-PIECE PATCH PLATE LIQUID LINE CHECK DISTRIBUTOR TUBES (UNCASED COIL ONLY) ORIFICE EXPANSION LIQUID LINE ORIFICE HOUSING...
- Page 10 STEP 2 – REFRIGERANT PIPING – Brazing Procedures CAP AND CORE REMOVAL CUT AND DEBUR Cut ends of the refrigerant lines square (free from nicks or dents) Remove service cap and core from and debur the ends. The pipe must remain round. Do not crimp end both the vapor and liquid line service of the line.
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Page 11: Braze Line Set
WRAP SERVICE VALVES To help protect service valve seals during brazing, wrap water-saturated cloths around service valve bodies and copper tube stubs. Use additional water-saturated cloths underneath the valve body to protect the base paint. FLOW NITROGEN Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the liquid service valve and out of the vapor valve stem port. - Page 12 Refrigerant Piping - Install Indoor Expansion Valve This outdoor unit is designed for use in systems that include an expansion valve metering device (purchased separately) at the indoor coil. See the Product Specifications for approved expansion valve kit match-ups and application information. The check expansion valve unit can be installed inside the cabinet.
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Page 13: Test For Leaks
STEP 3 – LEAK TEST AND EVACUATION (Continued) LEAK TEST HIGH MANIFOLD GAUGE SET OUTDOOR UNIT TO VAPOR SERVICE VALVE NOTE - Position canister to deliver liquid refrigerant. NITROGEN R-454B CONNECT GAUGE SET A - Connect the high pressure hose of an R-454B manifold gauge set to the vapor valve service port. NOTE - Normally, the high pressure hose is connected to the liquid line port. -
Page 14: Evacuate The System
STEP 3 – LEAK TEST AND EVACUATION (Continued) EVACUATION HIGH CONNECT GAUGE SET NOTE - Remove cores from service valves (if not already done). A - Connect low side of manifold gauge set with 1/4 SAE in-line tee to vapor line service valve B - Connect high side of manifold gauge set to OUTDOOR MANIFOLD... -
Page 15: Electrostatic Discharge
STEP 4 – ELECTRICAL – Circuit Sizing and Wire Routing In the U.S.A., wiring must conform with current local codes WARNING and the current National Electric Code (NEC). In Canada, wiring must conform with current local codes and the Fire Hazard. Use of aluminum wire with this product may current Canadian Electrical Code (CEC). -
Page 16: Electrical Wiring
Refer to the furnace or blower coil Installation Instructions Electrical Wiring for additional wiring application diagrams and refer to unit rating plate for minimum circuit ampacity and maximum All field wiring must be done in accordance with the National overcurrent protection size. Electrical Code (NEC) recommendations, Canadian 1. -
Page 17: Step 5 - Unit Start-Up
IMPORTANT STEP 5 – UNIT START-UP To prevent stripping of the various caps used, the IMPORTANT appropriately sized wrench should be used and fitted snugly over the cap before tightening. If unit is equipped with a crankcase heater, it should be energized 24 hours before unit start-up to prevent Using Manifold Gauge Set compressor damage as a result of slugging. -
Page 18: Start-Up
Stem cap protects the valve stem from damage and serves as the primary seal. Replace the stem cap and tighten as follows: Detailed information is given in the A7AC13F Installation and Service Procedures manual, which is available on 1/12 TURN With torque wrench, finger tighten and then torque cap per table 2. -
Page 19: Homeowner Information
Heating Demand NOTE - The filter and all access panels must be in place any time the unit is in operation. If you are unsure about the 1. Prompt a heating demand at the thermostat. filter required for your system, call your licensed contractor 2. - Page 20 2 - Check the cleanliness of outdoor fan and blade the refrigerant charge per the charging sticker information condition (cracks) and clean or replace them, if on the outdoor unit. necessary. 2 - Verify that system total static pressure and airflow 3 - Inspect base pan drains for debris and clean as settings are within specific operating parameters.
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Page 21: Wiring Diagram
Wiring Diagram FIGURE 18. AC Single Phase Wiring Diagram 508490-01 Issue 2417 Page 21 of 22... - Page 22 R-454B Refrigerant Pressure - Temperature Chart Saturated Saturated Saturated Saturated Saturated Saturated Saturated Saturated Pressure Pressure Pressure Pressure Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor (psig) (psig) (psig) (psig) Temp (°F) Temp (°F) Temp (°F) Temp (°F) Temp (°F) Temp (°F) Temp (°F) Temp (°F)
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