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507787-01

Issue 2007

Page 19 of 22

Heating (Heat Pump)

When the thermostat calls for heating, 24 volts is applied

to the blower time-delay relay coil. Then, normally open

contacts close, causing the indoor blower motor to

operate. The circuit between R and Y is completed, closing

the circuit to the contactor in the outdoor unit, starting the

compressor and outdoor fan motor.

If the room temperature continues to decrease, the circuit

between R and W1 is completed by the second-stage heat

room thermostat. Circuit R-W1 energizes a heat sequencer.

The completed circuit will energize supplemental electric

heat (if applicable). Units with a second heat sequencer

can be connected with the first sequencer to W1 on the

thermostat. They may also be connected to a second

heating stage W2 on the thermostat sub-base.

Emergency Heat (Heating Heat Pump)

If the selector switch on the thermostat is set to the

emergency heat position, the heat pump will be locked out

of the heating circuit, and all heating will be electric heat (if

applicable). A jumper should be placed between W2 and E

on the thermostat sub-base so that the electric heat control

will transfer to the first-stage heat on the thermostat. This

will allow the indoor blower to cycle on and off with the

electric heat when the fan switch is in the AUTO position.

Repairing or Replacing Cabinet Insulation

DAMAGED INSULATION MUST BE REPAIRED OR

REPLACED

before the unit is put back into operation.

Insulation loses its insulating value when wet, damaged,

separated or torn.

IMPORTANT

Matte- or foil-faced insulation is installed in indoor

equipment to provide a barrier between outside air

conditions (surrounding ambient temperature and humidity)

and the varying conditions inside the unit. If the insulation

barrier is damaged (wet, ripped, torn or separated from the

cabinet walls), the surrounding ambient air will affect the

inside surface temperature of the cabinet.

The temperature/humidity difference between the inside

and outside of the cabinet can cause condensation on the

inside or outside of the cabinet which leads to sheet metal

corrosion and, subsequently, component failure.

Repairing Damaged Insulation

Areas of condensation on the cabinet surface are an

indication that the insulation is in need of repair.

If the insulation in need of repair is otherwise in good

condition, the insulation should be cut in an X pattern,

peeled open, glued with an appropriate all-purpose glue

and placed back against the cabinet surface, being careful

to not overly compress the insulation so the insulation can

retain its original thickness. If such repair is not possible,

replace the insulation. If using foil-faced insulation, any

cut, tear, or separations in the insulation surface must be

taped with a similar foil-faced tape.

1. CUT INSULATION IN X PATTERN
2. APPLY GLUE
3. PRESS GLUED TABS AGAINST CABINET

GLUE - Make sure there is
full coverage of glue on the
metal or insulation so there
are no areas where air
pockets may form which
can lead to sweating.

Figure 20. Repairing Insulation

Содержание BCE5C Series

Страница 1: ...8 Operation 18 Repairing or Replacing Cabinet Insulation 19 Professional Maintenance 20 Homeowner Maintenance 20 Improper installation adjustment alteration service or maintenance can cause property damage personal injury or loss of life Installation and service must be performed by a licensed professional HVAC installer or equivalent service agency or the gas supplier WARNING The Clean Air Act of...

Страница 2: ...4 121 4 3 8 111 2 3 8 60 CONDENSATE DRAINS 2 Upflow and Downflow SUCTION LINE CONDENSATE DRAIN PIPING PLATE 3 2 1 4 x 3 3 4 BCE5C Unit Dimensions Upflow Inches mm Dimensions 018 024 030 036 042 048 060 in mm in mm in mm in mm in mm in mm A 43 1 2 1105 45 1 2 1156 47 1194 53 5 8 1362 55 1397 59 3 4 1518 B 18 1 2 470 18 1 2 470 18 1 2 470 21 1 2 546 21 1 2 546 21 1 2 546 C 16 1 2 419 16 1 2 419 16 1...

Страница 3: ...fore starting the installation In addition to conforming to manufacturer s installation instructions and local municipal building codes installation of air handler units with or without optional electric heat MUST conform with National Fire Protection Association NFPA standards Standard for Installation of Air Conditioning and Ventilation Systems NFPA No 90A and Standard for Installation of Reside...

Страница 4: ...e air handler evaporator coil supply fan assembly and duct system must be thoroughly cleaned following final construction clean up All air handler operating conditions must be verified according to these installation instructions EQUIPMENT MAY EXPERIENCE PREMATURE COMPONENT FAILURE AS A RESULT OF FAILURE TO FOLLOW THE ABOVE INSTALLATION INSTRUCTIONS FAILURE TO FOLLOW THE ABOVE INSTALLATION INSTRUC...

Страница 5: ... coil may tip into the drain pan once it is clear of the cabinet Support the coil when removing it IMPORTANT NOTE When the unit is installed in horizontal applications a secondary drain pan is recommended Refer to local codes NOTE This unit may be installed in left hand or right hand air discharge horizontal applications Adequate support must be provided to ensure cabinet integrity Ensure that the...

Страница 6: ...r The 90º bend must be on the same side as the horizontal drain pan as illustrated in Detail A in Figure 5 NOTE Be very careful when reinstalling the screws into the coil end plate engaging holes Misaligned screws may damage the coil 9 From the upflow position flip cabinet 90º to the left and set into place Replace blower assembly Secure coil in place by bending down the tab on the cabinet support...

Страница 7: ...heet metal screws 14 If suspending the unit it must be supported along the entire length of the cabinet If using chain or strap use a piece of angle iron or sheet metal attached to the unit either above or below so that the full length of the cabinet is supported Use securing screws no longer than 1 2ʺ to avoid damage to coil or filter as illustrated in Figure 3 Connect return and supply air plenu...

Страница 8: ...m Insulate the drain lines where sweating could cause water damage Test Condensate Drain Test the drain pan and drain line after installation 1 Pour several quarts of water into drain pan Use enough water to fill both the drain trap and the line 2 Check the installed drain pan Drain pan must be draining completely Drain line fittings must not be leaking Water must be draining from the end of the p...

Страница 9: ...n the summer resulting in an increase in the number of service calls Before using any filter with this system check the specifications provided by the filter manufacturer against the data given in the appropriate Product Specifications Additional information is provided in Service and Application Note ACC002 August 2000 IMPORTANT Installing Duct System Connect supply air duct to the flange on top ...

Страница 10: ...SION VALVE CAPILLARY TUBE IS NOT TOUCHING METAL EDGES OR COPPER TUBING REMOVE RUBBER PLUG FROM BOTH LIQUID AND SUCTION LINES NOTE BCE5C SERIES UNITS USE NITROGEN OR DRY AIR AS A HOLDING CHARGE IF THERE IS NO PRESSURE WHEN THE RUBBER PLUGS ARE REMOVED CHECK THE COIL FOR LEAKS BEFORE INSTALLING EITHER REMOVE OR PUSH PIPE WRAPPING BACK THROUGH HOLE IN PIPING PLATE BEFORE LINE SET CONNECTION AND BRAZI...

Страница 11: ...e set is required contact Technical Services NOTE Sealing the Unit Seal the unit so that warm air is not allowed into the cabinet Warm air introduces moisture which results in water blow off problems This is especially important when the unit is installed in an unconditioned area If installed in an unconditioned space sealant should be applied around the electrical wires refrigerant tubing and con...

Страница 12: ...s in accordance with tables 310 16 and 310 17 in the National Electric Code ANSI NFPA No 70 or tables 1 through 4 in the Canadian Electric Code Part I CSA Standard C22 1 The power supply must be sized and protected according to the specifications supplied on the product This air handler is factory configured for 240 volt single phase 60 cycles For 208 volt applications see 208 Volt Conversion late...

Страница 13: ...result in death or electrical shock WARNING 208 240 VOLT TRANSFORMER PRIMARY SECONDARY 240 Volts 208 Volts Figure 14 Converting Unit from 240VAC to 208VAC Figure 15 Thermostat Designations Non Communicating 1 Refer to thermostat installation instructions 2 If applicable 3 Refer to indoor unit installation instructions 4 L is used for any accessories e g diagnostic warning alarm used to activate th...

Страница 14: ...507787 01 Issue 2007 Page 14 of 22 4KW 5KW Figure 16 Typical Wiring Diagram BCE5C Air Handler with Electric Heat PSC 018 024 030 036 042 models ...

Страница 15: ...507787 01 Issue 2007 Page 15 of 22 4KW 5KW Figure 17 Typical Wiring Diagram BCE5C Air Handler with Electric Heat CT 048 and 060 models ...

Страница 16: ...oling blower speed is factory configured to provide correct air flow for an outdoor unit that matches the cooling capacity rating of the air handler If the outdoor unit is smaller than the maximum cooling capacity rating for the air handler the cooling blower speed may need to be changed Refer to blower performance chart in Table 4 Electric shock hazard Disconnect all power supplies before servici...

Страница 17: ...52 1390 1345 HIGH 1816 1756 1693 1605 1528 048 LOW 1257 1212 1157 1116 1053 MED LOW 1486 1448 1411 1364 1330 MED 1721 1675 1630 1594 1553 MED HIGH 1721 1675 1630 1594 1553 HIGH 1840 1794 1754 1721 1681 060 LOW 1098 1049 1001 926 831 MED LOW 1624 1594 1565 1520 1492 MED 1815 1783 1758 1730 1685 MED HIGH 1903 1869 1837 1809 1764 HIGH 1981 1957 1923 1893 1861 Blower Performance CFM vs ESP in w c Cool...

Страница 18: ...cycle off Check Electric Heat If Used 1 Set thermostat to call for auxiliary heat approximately 5 F above ambient temperature The indoor blower and auxiliary heat should come on together Allow a minimum of 3 minutes for all sequencers to cycle on 2 Set the thermostat so that it does not call for heat Allow up to 5 minutes for all sequencers to cycle off Operation Time Delay Relay Blower time delay...

Страница 19: ... unit is put back into operation Insulation loses its insulating value when wet damaged separated or torn IMPORTANT Matte or foil faced insulation is installed in indoor equipment to provide a barrier between outside air conditions surrounding ambient temperature and humidity and the varying conditions inside the unit If the insulation barrier is damaged wet ripped torn or separated from the cabin...

Страница 20: ...nance Do not operate system without a filter A filter is required to protect the coil blower and internal parts from excessive dirt and dust The filter is placed in the return duct by the installer IMPORTANT Inspect air filters at least once a month and replace or clean as required Dirty filters are the most common cause of inadequate heating or cooling performance Replace disposable filters Clean...

Страница 21: ...ing Mode Return Duct Temperature ___________ THERMOSTAT Adjusted and Programmed Return External Static ______ ______ Total External Static ______ ______ 6 Supply Duct Temperature ___________ Temperature Drop ___________ TEMPERATURE RISE Heating Mode Return Duct Temperature __________ Supply Duct Temperature __________ Temperature Rise __________ Operation Explained to Owner 9 Explained Operation o...

Страница 22: ...______ Total External Static ______ ______ 6 6 Supply Duct Temperature ___________ Temperature Drop ___________ TEMPERATURE RISE Heating Mode Return Duct Temperature __________ Supply Duct Temperature __________ Temperature Rise __________ Operation Explained to Owner 9 Electric Heat Amps 7 Explained Operation of System to Homeowner Technician s Name _______________________Date Start Up Performanc...

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