Friedrich H)A09K25 user manual

User manual for the device Friedrich H)A09K25

Device: Friedrich H)A09K25
Category: Air Conditioner
Manufacturer: Friedrich
Size: 0.96 MB
Added : 4/17/2014
Number of pages: 44
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Abstracts of contents
Summary of the content on the page No. 1

Service Manual
A SERIES
Single Package
Vertical Air Conditioning System
A – H Suffi x Models
MODELS
V(E,H)A09K25*** V(E,H)A09K34*** V(E,H)A09K50***
V(E,H)A12K25*** V(E,H)A12K34*** V(E,H)A12K50***
V(E,H)A18K25*** V(E,H)A18K34*** V(E,H)A18K25***
V(E,H)A24K25*** V(E,H)A24K34*** V(E,H)A24K50***
V(E,H)A24K75*** V(E,H)A24K10*** V(E,H)A24K00***
*** Digits vary with model.
VPSERVMN (4-05)

Summary of the content on the page No. 2

Table of Contents Introduction ......................................................................3 Undercharged Refrigerant Systems ..............................17 Vert-I-Pak Model Number Identifi cation Guide ..............4 Overcharged Refrigerant Systems ................................18 Serial Number Identifi cation Guide .................................4 Restricted Refrigerant Systems .....................................18 H Suffi x Chassis Specifi cations .............................

Summary of the content on the page No. 3

Introduction This service manual is designed to be used in conjunction with the installation manuals provided with each air conditioning system component. Air conditioning systems consist of BOTH an evaporator (indoor section) and a condenser (outdoor section) in one closed system, and a room thermostat. When so equipped, accessories such as electric strip heaters are also considered part of the system. This service manual was written to assist the professional HVAC service technician to qu

Summary of the content on the page No. 4

Model Identifi cation Guide MODEL NUMBER V E A 24 K 50 RT A SERIES EN GI NEER ING CODE V=Vertical Series E=Cooling with or without electric heat OPTIONS H=Heat Pump RT = Stan dard Remo te Op er a tion SP = Sea coast Pro tect ed DESIGN SERIES A = 32" and 47" Cabinet NOMINAL CAPACITY ELECTRIC HEATER SIZE A-Series (Btu/h) A-Series 09 = 9,000 00 = No electric heat 12 = 12,000 25 = 2.5 KW 18 = 18,000 34 = 3.4 KW 24 = 24,000 50 = 5.0 KW 75 = 7.5 KW VOLTAGE 10 = 10 KW K = 208/230V-1Ph-60Hz Seria

Summary of the content on the page No. 5

® VERT-I-PAK H SUFFIX CHASSIS SPECIFICATIONS VEA/VHA9K-24K VEA09K VEA12K VEA18K VEA24K VHA09K VHA12K VHA18K VHA24K COOLING D A T A Cooling Btu/h 9500/9300 11800/11500 18000/17800 24000 9500/9300 11800/11500 18000/17800 23500 Cooling Power (W) 880 1093 2070 2526 905 1124 2070 2474 EER 10.8 10.8 8.7 9.5 10.5 10.5 8.7 9.5 Sensible Heat Ratio 0.74 0.72 0.70 0.70 0.74 0.72 0.70 0.70 HEA T PUMP D A T A Heating Btu/h N/A N/A N/A N/A 8500/8300 10600/10400 15700/15500 22500 COP @ 47°F N/A N/A N/A N/A 3.

Summary of the content on the page No. 6

® VERT-I-PAK E & G SUFFIX CHASSIS SPECIFICATIONS Model V(E,H)A09 V(E,H)A12 V(E,H)A18 V(E,H)A24 Voltage (V) 230 / 208 230 / 208 230 / 208 230 / 208 R-22 R-22 R-22 R-22 Refrigerant 23.125" 23.125" 23.125" 23.125" Chassis Width 23.125" 23.125" 23.125" 23.125" Chassis Depth 32.25" 32.25" 32.25" 47.25" Chassis Height ** 26" x 28.5" x 35.0" 26." x 28.5" x 35" 26" x 28.5" x 35" 26" x 28.5" x 50" Shipping W x D x H Supply Duct Collar *** 10" 10" 10" 10" 3/4" FPT 3/4" FPT 3/4" FPT 3/4" FPT Drain Connecti

Summary of the content on the page No. 7

® VERT-I-PAK A - D SUFFIX CHASSIS SPECIFICATIONS Model V(E,H)A09 V(E,H)A12 V(E,H)A18 Voltage (V) 230 / 208 230 / 208 230 / 208 Refrigerant R-22 R-22 R-22 Chassis Width 23.125" 23.125" 23.125" Chassis Depth 23.125" 23.125" 23.125" Chassis Height ** 32.25" 32.25" 32.25" Shipping W x D x H 26" x 28" x 35" 26" x 28" x 35" 26" x 28" x 35" Supply Duct Collar *** 10" 10" 10" Drain Connection 1/2" MPT 1/2" MPT 1/2" MPT Drain Hose **** 12" long 12" long 12" long Thermostat Harness 36" long 36" long 36" l

Summary of the content on the page No. 8

Sequence of Operation A good understanding of the basic operation of the refrigeration The refrigerant leaves the condenser coil through the liquid system is essential for the service technician. Without this line as a WARM high pressure liquid. It next will pass through understanding, accurate troubleshooting of refrigeration the refrigerant drier (if so equipped). It is the function of the system problems will be more diffi cult and time consuming, drier to trap any moisture present in the

Summary of the content on the page No. 9

Electrical Supply Supply Voltage WARNING: Electrical shock hazard. To insure proper operation, supply voltage to the system should be within fi ve (5) percent (plus or minus) of listed Turn OFF electric power at fuse box or service panel rating plate voltage. before making any electrical connections and ensure a proper ground connection is made before connecting line Control (Low) Voltage voltage. To insure proper system operation, the transformer All electrical connections and wiring MUS

Summary of the content on the page No. 10

Room Thermostats Thermostat Location Room thermostats are available from several different manufacturers in a wide variety of styles. They range from the very simple Bimetallic type to the complex electronic set-back type. In all cases, no matter how simple or complex, they are simply a switch (or series of switches) designed to turn equipment (or components) "ON" or "OFF" at the desired conditions. An improperly operating, or poorly located room thermostat can be the source of perceive

Summary of the content on the page No. 11

R FAN FAN Typical Electrical & Thermostat Wiring Diagrams VEA/VHA 24K FOR 208 VOLT MODELS ONLY MOVE THE WHITE WIRE AS SHOWN BELOW RT2 THERMOSTAT (FRONT) COM. 208V 240V TRANSFORMER THERMOSTAT CONNECTIONS (EAR) 24V UP G R BLACK R W B Y C RED HEATER HEATER 2.5 KW & 3.4 KW 7.5 KW & 10 KW 5 KW COIL, SOLENOID BROWN QUICK DISCONNECT RED L1 L2 RED BLACK BLACK RED WHITE BLACK WHITE BLACK BLUE WHITE RED PRESSURE REV VALVE HEAT HEAT HEAT HEAT SWITCH FAN COMP WIRE HARNESS RELAY RELAY RELAY COMPR R

Summary of the content on the page No. 12

Typical Electrical & Thermostat Wiring Diagrams G & H Suffi x COM. 208V 240V RT1 THERMOSTAT (FRONT) NOTE: THE DIAGRAM ABOVE ILLUSTRATES THE TYPICAL THERMOSTAT WIRING AND 208 VOLT TRANSFORMER WIRING. SEE THE UNIT CONTROL PANEL FOR THE ACTUAL UNIT WIRING DIAGRAM AND SCHEMATIC. 12

Summary of the content on the page No. 13

Typical Electrical & Thermostat Wiring Diagrams A – E Suffi x FOR 208 VOLT MODELS ONLY: MOVE THE WHITE WIRE AS SHOWN BELOW. 13

Summary of the content on the page No. 14

Indoor Blower - Airfl ow Heating (Electric) The current Vert-I-Pak 9, 12, & 18 use a dual shaft, permanent When using electric heaters, select the blower speed that split capacitor, single speed motor to drive indoor blower and provides adequate airfl ow across the elements to prevent outdoor fan. Earlier model VERT-I-Pak units used 2-speed overheating and cycling on limit and/or premature failure. motors. The Vert-I-Pak 24 uses an individual, single shaft, CHECK THE EXTERNAL STATIC PRESSURE,

Summary of the content on the page No. 15

the case of the VERT-I-PAK, the condensate will cause Checking External Static Pressure a reduction in measured External Static Pressure for the The airflow through the unit can be determined by given airfl ow. measuring the external static pressure of the system, and consulting the blower performance data for the specifi c It is also important to remember that when dealing with VERT-I-PAK. VERT-l-PAK units that the measured External Static Pressure increases as the resistance is added exte

Summary of the content on the page No. 16

Airfl ow Charts A – D Suffi x Chart A CFM @ 230 Volts - DRY COIL Chart B Correction Factors — Model > V(E,H)A09/A12 V(E,H)A18 Correction To Correct for: Factor — Fan Speed High Low High Low > 230 Volts 1.00 CFM CFM CFM CFM ESP (in water) 208 Volts 0.97 0.00 N/A 427 N/A 517 Dry Coil 1.00 0.10 411 387 510 480 Wet Coil 0.94 0.20 373 347 500 470 0.30 327 310 490 460 Ductwork Preparation Pull the fl ex duct tight. Extra fl ex duct slack can greatly increase static pressure Explanation of charts

Summary of the content on the page No. 17

Method Of Charging The acceptable method for charging the Vert-I-Pak system 2. Recover Refrigerant in accordance with EPA is the Weighed in Charge Method. The weighed in charge regulations. method is applicable to all units. It is the preferred method 3. Install a process tube to sealed system. to use, as it is the most accurate. 4. Make necessary repairs to system. The weighed in method should always be used whenever a charge is removed from a unit such as for a leak repair, 5. Evacuate sy

Summary of the content on the page No. 18

Overcharged Refrigerant Systems Compressor amps will be near normal or higher. Noncondensables can also cause these symptoms. To confi rm, remove some of the charge, if conditions improve, system may be overcharged. If conditions don’t improve, Noncondensables are indicated. Whenever an overcharged system is indi cated, always make sure that the problem is not caused by air fl ow problems. Improper air fl ow over the evaporator coil may indicate some of the same symptoms as an overcharged s

Summary of the content on the page No. 19

Metering Device - Capillary Tube Systems All units are equipped with capillary tube metering devices. 3. Switch the unit to the heating mode and observe the gauge readings after a few minutes running time. If Checking for restricted capillary tubes. the system pressure is lower than normal, the heating capillary is restricted. 1. Connect pressure gauges to unit. 4. If the operating pressures are lower than normal 2. Start the unit in the cooling mode. If after a few minutes in both the heat

Summary of the content on the page No. 20

Checking Reversing Valve NOTE: You must have normal operating pressures before the reversing valve can shift. Check for proper refrigerant charge. Sluggish or sticky reversing valves can sometimes be remedied by reversing the valve several time with the airfl ow restricted to increase system pressure. To raise head pressure during the cooling season the airfl ow through the outdoor coil can be restricted . During heating the indoor air can be restricted by blocking the return air. Dented or


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