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CAUTION:

Be sure burner enclosure front is in place

after adjustments have been made.

j. Look through sight glass in burner enclosure and check

burner flame. The burner flame should be clear blue,
almost transparent. (See Fig. 47.)

Set Temperature Rise

CAUTION:

Temperature rise must be within limits specified on unit
rating plate. Recommended operation is at midpoint of
rise or above. Failure to follow this caution may result in
condensing or overheating the heat exchangers.

Furnace must operate within range of temperature rise specified on
the unit rating plate. Determine air temperature rise as follows:

1. Place thermometers in return and supply ducts as near

furnace as possible. Be sure thermometers do not see heat
exchanger so that radiant heat does not affect readings. This
practice is particularly important with straight-run ducts.

2. When thermometer readings stabilize, subtract return-air

temperature from supply-air temperature to determine air
temperature rise.

NOTE:

Temperature rise can be determined for low-fire opera-

tion by placing setup switch SW-2 on control center in the ON
position. For high-heat operation, place setup switch SW-2 in the

OFF position and jumper R-W2 on control center. DO NOT forget
to return setup switch to OFF position and remove R-W2 jumper
upon completion of testing. (See Fig. 25 for switch and terminal
location.)

3. This furnace is capable of automatically providing the

proper airflow to maintain the temperature rise within the
range specified on the unit rating plate. If the temperature
rise is outside this range, proceed as follows:

a. Check gas input for low- and high-heat operation.

b. Check derate for altitude if applicable.

c. Check all return and supply ducts for excessive restric-

tions causing static pressure greater than 0.5-in. wc.

d. Ensure bypass humidifier switch (BPH) setup switch

SW-3 on control center is in ON position when a bypass
humidifier is used. (See Fig. 25 for switch location.)

e. Check Troubleshooting Guide for Gas-Fired Condensing

Furnaces.

Set Thermostat Heat Anticipator

The thermostat heat anticipator must be set to match the amp draw
of the components in the R-W/W1 circuit. Accurate amp draw
measurements can be obtained at the thermostat subbase terminals
R and W.

Fig. 48 illustrates an easy method of obtaining thermostat amp
draw measurements. The amp reading should be taken after the
blower motor has started and furnace is operating in low heat.

TABLE 11—MODEL 355MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT RATE

(Tabulated Data Based on Altitude Up to 2000 ft and 20,000 Btuh High Heat/13,000 Btuh Low Heat Per Burner)

GAS HEAT

VALUE

(BTU/CU FT)

SPECIFIC GRAVITY OF NATURAL GAS

0.58

0.60

0.62

0.64

0.66

0.68

0.70

0.72

Orf

No.

Heat

High/Low

Orf

No.

Heat

High/Low

Orf

No.

Heat

High/Low

Orf

No.

Heat

High/Low

Orf

No.

Heat

High/Low

Orf

No.

Heat

High/Low

Orf

No.

Heat

High/Low

Orf

No.

Heat

High/Low

860

3.7/1.6

3.8/1.6

3.2/1.4

3.3/1.4

3.4/1.5

41
42

3.2/1.4
3.6/1.5

41
42

3.3/1.4
3.7/1.5

41
42

3.4/1.4
3.8/1.6

875

3.6/1.5

3.7/1.6

3.8/1.6

3.2/1.4

3.3/1.4

3.4/1.4

41
42

3.2/1.3
3.5/1.5

41
42

3.3/1.4
3.6/1.5

890

3.5/1.5

3.6/1.5

3.7/1.6

3.8/1.6

3.2/1.4

3.3/1.4

3.4/1.4

41
42

3.2/1.3
3.5/1.5

905

43
44

3.3/1.3
3.7/1.5

3.5/1.4

3.6/1.5

3.7/1.5

3.8/1.6

3.2/1.4

3.3/1.4

3.4/1.4

920

43
44

3.2/1.3
3.7/1.5

43
44

3.3/1.4
3.8/1.6

3.5/1.4

3.6/1.5

3.7/1.5

3.8/1.5

3.2/1.3

3.3/1.3

935

3.6/1.5

43
44

3.2/1.4
3.7/1.6

43
44

3.3/1.4
3.8/1.6

3.5/1.5

3.6/1.5

3.7/1.5

3.8/1.6

3.2/1.3

950

3.5/1.5

3.6/1.5

43
44

3.2/1.4
3.7/1.6

43
44

3.3/1.4
3.8/1.6

3.4/1.5

3.6/1.5

3.7/1.5

3.8/1.6

965

3.4/1.4

3.5/1.5

3.6/1.5

43
44

3.2/1.4
3.7/1.6

43
44

3.3/1.4
3.8/1.6

3.4/1.5

3.5/1.5

3.6/1.5

980

3.3/1.4

3.4/1.4

3.5/1.5

3.6/1.5

43
44

3.2/1.4
3.7/1.6

43
44

3.3/1.4
3.8/1.6

3.4/1.5

3.5/1.5

995

44
45

3.2/1.3
3.8/1.6

3.3/1.4

3.4/1.4

3.5/1.5

3.6/1.5

43
44

3.2/1.4
3.7/1.6

43
44

3.3/1.4
3.8/1.6

3.4/1.4

1010

3.7/1.6

44
45

3.2/1.3
3.8/1.6

3.3/1.4

3.4/1.4

3.5/1.5

3.6/1.5

43
44

3.2/1.4
3.7/1.6

43
44

3.3/1.4
3.8/1.6

1025

45
46

3.6/1.5
3.8/1.6

3.7/1.6

3.2/1.3

3.3/1.4

3.4/1.4

3.5/1.5

3.6/1.5

43
44

3.2/1.4
3.7/1.6

1040

45
46

3.5/1.5
3.7/1.6

45
46

3.6/1.5
3.8/1.6

3.7/1.6

3.2/1.3

3.3/1.4

3.4/1.4

3.5/1.5

3.6/1.5

1055

45
46

3.4/1.4
3.6/1.5

45
46

3.5/1.5
3.7/1.6

45
46

3.6/1.5
3.8/1.6

3.8/1.6

3.2/1.3

3.3/1.4

3.4/1.4

3.5/1.5

1070

45
46

3.3/1.4
3.5/1.5

45
46

3.4/1.4
3.6/1.5

45
46

3.5/1.5
3.7/1.6

45
46

3.7/1.5
3.8/1.6

3.8/1.6

3.2/1.4

3.3/1.4

3.4/1.4

1085

45
46
47

3.2/1.4
3.4/1.4
3.8/1.6

45
46

3.3/1.4
3.5/1.5

45
46

3.4/1.5
3.6/1.5

45
46

3.6/1.5
3.7/1.6

3.7/1.5

3.8/1.6

3.2/1.4

3.3/1.4

1100

46
47

3.3/1.4
3.7/1.6

45
46

3.2/1.4
3.4/1.4

45
46

3.4/1.4
3.5/1.5

45
46

3.5/1.5
3.6/1.5

45
46

3.6/1.5
3.8/1.6

3.7/1.6

3.8/1.6

3.2/1.4

—36—

Содержание 355MAV C Series

Страница 1: ...Concentric Vent and Combustion Air Termination Kit Installation 25 27 Multiventing and Vent Terminations 27 29 CONDENSATE DRAIN 29 General 29 Application 29 Condensate Drain Protection 29 SEQUENCE OF...

Страница 2: ...TLET 26 15 16 28 1 2 22 5 16 19 13 16 5 8 5 16 1 39 7 8 22 1 4 TYP 11 16 7 16 24 3 16 BOTTOM INLET 18 1 4 22 11 16 2 IN COMBUSTION AIR CONN 1 2 IN DIA GAS CONN 7 8 IN DIA POWER CONN 1 2 IN DIA THERMOS...

Страница 3: ...ro static potential 1 Disconnect all power to the furnace DO NOT TOUCH THE CONTROL OR ANY WIRE CONNECTED TO THE CONTROL PRIOR TO DISCHARGING YOUR BODY S ELECTROSTATIC CHARGE TO GROUND 2 Firmly touch a...

Страница 4: ...and all authorities having jurisdiction These instructions cover minimum requirements for a safe instal lation and conform to existing national standards and safety codes In some instances these inst...

Страница 5: ...ing tabs inward and rotating trap 3 Remove casing hole filler cap from casing hole See Fig 2 or 6 4 Install casing hole filler cap into blower shelf hole where trap was removed 5 Install condensate tr...

Страница 6: ...roper connections UPPER INDUCER HOUSING DRAIN CONNECTION Attached to the UPPER unused inducer housing drain connection is a cap and clamp This cap is used to prevent condensate leakage in this applica...

Страница 7: ...ector box drain tube blue and white striped label which was pre viously plugged b Connect larger diameter drain tube factory supplied in loose parts bag to drain tube coupling extending collector box...

Страница 8: ...arts bag to extend collector box pressure tube green label which was previously connected to condensate trap relief port connection 3 Connect collector box pressure tube green label to pres sure switc...

Страница 9: ...The LOWER collector box pressure tube pink label is factory connected to the pressure switch and should not require any modification NOTE See Fig 9 or tube routing label on main furnace door to check...

Страница 10: ...ig 11 or tube routing label on main furnace door to check for proper connections Relocate tubes as described below 1 Disconnect collector box pressure tube pink label attached to pressure switch 2 Use...

Страница 11: ...alers and or new carpets are being installed make sure all combustion and circulating air requirements are followed If operation of furnace is required during construction use clean outside air for co...

Страница 12: ...perated they must be equipped with a means to prevent operation of either unit unless damper is in full heat or full cool position IV HAZARDOUS LOCATIONS NOTE These furnaces are designed for a minimum...

Страница 13: ...ischarge duct flanges when they interfere with mating flanges on coil on downflow subbase To remove furnace perforated discharge duct flange use wide duct pliers or duct flange tool to bend flange bac...

Страница 14: ...ttom inlet is used VI BOTTOM CLOSURE PANEL These furnaces are shipped with bottom enclosure panel installed in bottom return air opening This panel MUST be in place when side return air is used To rem...

Страница 15: ...bustible material 2 The entire length of furnace must be supported when furnace is used in horizontal position to ensure proper drainage A PREFERRED ROD LOCATION B ALTERNATE ROD LOCATION DRAIN 5 3 4 3...

Страница 16: ...nection MUST be installed immediately upstream of gas supply connection to furnace and downstream of manual shutoff valve NOTE The gas valve inlet press tap connection is suitable to use as test gage...

Страница 17: ...STAT TERMINALS FIELD SUPPLIED FUSED DISCONNECT CONDENSING UNIT R W2 W C R G Y GND GND GND GND FIELD 24 VOLT WIRING FIELD 115 208 230 460 VOLT WIRING FACTORY 24 VOLT WIRING FACTORY 115 208 230 460 VOLT...

Страница 18: ...OR PL3 5 CIRCUIT BLOWER MTR CONNECTOR PL4 2 CIRCUIT HSI CONNECTOR PL5 6 CIRCUIT MODEL PLUG PL6 3 CIRCUIT COMM CONNECTOR PL7 12 CIRCUIT INDUCER MTR CONNECTOR PL9 2 CIRCUIT HSI CONNECTOR PL10 9 CIRCUIT...

Страница 19: ...stripped end into factory supplied white leads s butt connector and crimp to secure NOTE If desired cut butt connectors off factory leads and strip insulation approximately 1 4 in and use field suppli...

Страница 20: ...I COMBUSTION AIR AND VENT PIPING A General Combustion air and vent pipe fittings must conform to American National Standards Institute ANSI standards and American Society for Testing and Materials AST...

Страница 21: ...y in well ventilated areas Avoid breathing in vapor or allowing contact with skin or eyes Failure to follow this warning could result in fire property damage personal injury or death TABLE 4 COMBUSTIO...

Страница 22: ...20 ft with 3 elbows but only 10 ft with 5 elbows Therefore 2 in diameter pipe must be used for both vent and combustion air pipes since larger required diameter must always be used for both pipes If...

Страница 23: ...In Concentric 1 1 2 42 37 32 27 22 17 2 70 70 70 70 70 70 042060 2 Pipe or 2 In Concentric 1 1 2 42 37 32 27 22 17 2 70 70 70 70 70 70 042080 060080 2 Pipe or 2 In Concentric 1 1 2 25 20 15 10 5 NA 2...

Страница 24: ...6 65 63 62 60 59 042060 2 Pipe or 2 In Concentric 1 1 2 32 27 22 17 12 7 2 66 65 63 62 60 59 042080 060080 2 Pipe or 2 In Concentric 1 1 2 18 13 8 NA NA NA 2 66 65 63 62 57 52 060100 2 Pipe or 2 In Co...

Страница 25: ...Apply second coat 9 While cement is still wet twist pipe into socket with 1 4 turn Be sure pipe is fully inserted into fitting socket 10 Wipe excess cement from joint A continuous bead of cement will...

Страница 26: ...AIN 12 IN CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW LEVEL OR GRADE WHICHEVER IS GREATER 90 VENT 12 IN SEPARATION BETWEEN BOTTOM OF COMBUSTION AIR AND BOTTOM OF VENT BRACKET COUPLING 12 MINIMUM OVERHANG...

Страница 27: ...vent vapors will not damage plants shrubs or air conditioning equip ment c Termination kit should be positioned so it will not be affected by wind eddy such as inside building corners or accumulation...

Страница 28: ...m Separation A93056 COMBUSTION AIR VENT VENT A Fig 40 Sidewall Termination of More Than 12 in Dimension A is Touching or 2 In Maximum Separation A85183 VENT A COMBUSTION AIR COMBUSTION AIR Fig 38 Conc...

Страница 29: ...pment s drain See Fig 41 for example of possible field drain attachment using 1 2 in CPVC or PVC tee for vent and A C or humidifier drain connection Outdoor draining of the furnace is permissible if a...

Страница 30: ...holds gas valve open and begins blower on delay period NOTE Ignition sequence repeats 3 additional times before a lockout occurs Lockout automatically resets after 3 hr or can be manually reset by tu...

Страница 31: ...r operates in continuous fan speed and indoor coil freeze up may occur 3 Electronic Air Cleaner The EAC 1 terminal is energized whenever blower operates 4 Cooling unit The cooling unit stops when ther...

Страница 32: ...is closed red microprocessor LED briefly comes on Then green LED comes on for 1 sec followed by 1 sec where both green and yellow LEDs are on During this time the microprocessor is checking itself 2...

Страница 33: ...ements Position these setup switches for the appropriate requirement 1 Remove main furnace door and blower access panel 2 Locate setup switches on the control center See Fig 25 3 See Table 9 for setup...

Страница 34: ...c gravity for local gas supply c Verify the furnace model Table 11 can only be used for model 355MAV Furnaces d Find natural gas heat value and specific gravity in Table 11 e Follow heat value line an...

Страница 35: ...furnace locked in low heat operation c Turn low heat adjusting screw 5 64 hex Allen wrench counterclockwise out to decrease input rate or clock wise in to increase rate When adjusting input rate DO N...

Страница 36: ...as started and furnace is operating in low heat TABLE 11 MODEL 355MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT RATE Tabulated Data Based on Altitude Up to 2000 ft and 20 000 Btuh High Heat...

Страница 37: ...g properly fault code 42 will flash on the control center approximately 10 sec after the thermostat switch is closed If either fault code 31 or 32 is TABLE 12 GAS RATE CU FT HR SECONDS FOR 1 REVOLUTIO...

Страница 38: ...ay tools and instruments Clean up debris 2 Verify manual reset switch has continuity 3 Verify that blower and control access doors are properly installed 4 Cycle test furnace with room thermostat 5 Ch...

Страница 39: ...e Sloped To Furnace Pipe Insulation ________ Over Ceilings ________ Low Ambient Exposed Pipes Condensate Drain ________ Unit Level or Pitched Forward ________ Internal Tubing Connections Free of Kinks...

Страница 40: ...sing popular video based formats and materials All include video and or slides plus companion book Classroom Service Training plus hands on the products in our labs can mean increased confidence that...

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