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Trane GRAA Скачать руководство пользователя страница 22

22

MUA-SVX004B-EN

Figure 11.

Drip Leg Installation

Figure 12.

Field Piping Recommendations

UNION

NIPPLE

NIPPLE

ELBOW

ELBOW

NIPPLE

UNION

NIPPLE

•

For the most satisfactory piping installation, the following procedure should be followed.
Make piping layout of the whole installation and calculate the cubic feet of gas that each
supply pipe will carry. See piping example below.

•

Calculate the cubic feet of gas that each supply pipe will carry:

Btu/Hr.

37.3 Megajoules Natural Gas/Cu Meter

= Liters per second on Gas to Unit (l/s)

1000 Btu Natural Gas/Cu. Ft.

= Cu. Ft. Per Hour of Gas to Unit (cfh)

Unit Kilowatt

N

No

otte

e:: Contact your natural gas supplier for the Btu/Cu. Ft. content of natural gas in your area.

This may be higher or lower than the nominal 1000 Btu/Cu. Ft. used in this example:

Referring to the piping example in

Figure 13, p. 23

, the length of pipe from the gas meter (A) to

the most remote heater (E) is 60 feet. This distance should be used for all of the heaters when
determining the pipe size required. Based on the column marked 60 feet in chart 3, the piping for
this example should be sized as follows:

•

450 cfh is supplied from A to B, requiring 1-1/4 inch pipe.

•

200 cfh is supplied from B to C, requiring 1 inch pipe.

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Содержание GRAA

Страница 1: ...properly installed adjusted or altered equipment by an unqualified person could result in death or serious injury When working on the equipment observe all precautions in the literature and on the tag...

Страница 2: ...ble refrigerant practices are important to the environment our customers and the air conditioning industry All technicians who handle refrigerants must be certified The Federal Clean Air Act Section 6...

Страница 3: ...el le ec ct tr ri ic ca al l c co on nt ta ac ct t a ar rc c o or r f fl la as sh h t te ec ch hn ni ic ci ia an ns s M MU US ST T p pu ut t o on n a al ll l P PP PE E i in n a ac cc co or rd da an n...

Страница 4: ...n 15 Clearances 15 Venting 17 Field Installation Instructions 18 Duct Specifications 20 Gas Connections 21 Electrical Connections 25 Operation 26 General Information 26 Controls 28 Operating High Limi...

Страница 5: ...t 35 Pilot Adjustment 36 Gas Input Adjustment 37 Meter Method of Checking Input 37 Manifold Pressure Method of Checking Input 37 Start Up 38 Starting Unit In Heating Mode 38 Final Checkout 38 Maintena...

Страница 6: ...atus required to perform emergency service or annual periodic maintenance to this equipment Rigging Rig the unit using either belt or cable slings Use spreader bar to protect the top of the unit when...

Страница 7: ...n containers in the vicinity of this appliance is hazardous If you smell gas Do not touch electrical switches Extinguish any open flames Immediately call your gas supplier Failure to comply with the g...

Страница 8: ...ctor and air shutters All internal and external jacket parts are fabricated from galvanized steel Stainless steel heat exchangers burners and flue collectors are optional An optional 321 or 409 stainl...

Страница 9: ...16 23 1 2 1 2 835 1 2 465 546 406 640 597 767 23 13 16 20 43 7 8 23 1 2 16 25 3 16 26 1 4 41 3 16 1 2 1 2 1114 605 597 406 640 667 1046 25 43 7 8 29 5 16 23 1 2 16 25 3 16 34 1 2 41 3 16 3 4 1114 745...

Страница 10: ...lectrical Connections Anchor Hole Location 5 8 16 Typ A 10 1 8 257 B Opening Typ Anchor Hole Location 13 16 21 Typ Gas Connection 8 3 4 222 F 26 660 31 1 4 794 C L 39 991 19 483 Opening K 1 1 8 29 Fla...

Страница 11: ...20 60 2 7 1 8 1 2 1 2 253 364 29 3 23 4 0 583 1 748 11 33 0 50 181 165 115 150 150 000 120 000 80 1 852 5 556 20 60 2 11 1 4 1 2 1 2 304 415 43 9 35 1 0 874 2 622 11 33 0 50 286 188 138 200 200 000 1...

Страница 12: ...size based on heat loss of the building to be heated Select temperature rise desired Based on temperature rise the horizontal line intersects heater temperature vs CFM curve Follow vertical line down...

Страница 13: ...be heated Select temperature rise desired Based on temperature rise the horizontal line intersects heater temperature vs CFM curve Follow vertical line down to select CFM For pressure drop selection...

Страница 14: ...t is not factory furnished and must be built on the job by the installer and a damper placed therein if required Use of Bypass Curves The width of the by pass for CFM in excess of that provided throug...

Страница 15: ...sealed to prevent water from entering either furnace or building through duct see section on duct and drain specifications Ducts connected to duct furnaces shall have removable access panels on both u...

Страница 16: ...rk Natural or Power Vent Furnace Air Flow 5 16 8 18 457 18 457 36 914 36 914 Clearance For Drawer Pul out 18 457 5 16 8 Typ Power Vent Units required 36 clearance above top of unit See Figure 1 p 9 an...

Страница 17: ...v vi is si io on ns s o of f l lo oc ca al l b bu ui il ld di in ng g c co od de es s V Ve en nt ti in ng g i is s a an n i in nt te eg gr ra al l p pa ar rt t o of f t th he e u un ni it t a an nd d...

Страница 18: ...h combustion air inlet and flue products outlet located in the louvered side access panel Never locate these units in an area where the flue products outlet may be directed at any fresh air vents See...

Страница 19: ...MUA SVX004B EN 19 Figure 10 Power Venter Discharge Location 3 V Ve en nt ti in ng g...

Страница 20: ...s Be sure to properly seal to avoid any air leakage see Figure 1 p 9 and Figure 2 p 10 Ductwork connected to duct furnaces should have removable access panels on both the upstream and downstream sides...

Страница 21: ...i in n d da am ma ag ge e t to o t th he e u un ni it t g ga as s v va al lv ve e a an nd d c ca au us se e a a f fi ir re e h ha az za ar rd d w wh hi ic ch h c co ou ul ld d r re es su ul lt t i in...

Страница 22: ...atural Gas Cu Ft Cu Ft Per Hour of Gas to Unit cfh Unit Kilowatt N No ot te e Contact your natural gas supplier for the Btu Cu Ft content of natural gas in your area This may be higher or lower than t...

Страница 23: ...n 30 in 50 20 10 40 60 70 80 90 Maximum Capacity of Pipe in Cubic Feet of Gas per Hour for Gas Pressures of 0 5 psig 3 5 kPa or Less and a Pressure Drop of 0 5 Inch Water Column 124 4 Pa Based on a 0...

Страница 24: ...ocal codes before installing 1 2 pipe For natural gas cu ft hr Input Rate of Unit Btu Value of Gas For propane gas Multiply the Cu Ft Hr obtained in the note above by 0 633 before entering chart G Ga...

Страница 25: ...gram refer to this wiring diagram for all electrical connections to the unit All electrical connections must conform to the latest edition of ANSI NFPA No 70 National Electrical Code and applicable lo...

Страница 26: ...than 14 inches WC 3 5 kPa a step down pressure regulator must be installed ahead of the gas valve For LP propane gas the gas pressure supplied should not exceed 14 inches WC 3 5 kPa The controls are...

Страница 27: ...w Fire 1 1 inch WC 0 27 kPa 3 8 inch WC 0 95 kPa Modulating Application High Fire 3 5 inch WC 0 87 kPa 10 0 inch WC 2 49 kPa Modulating Application Low Fire 0 9 inch WC 0 22 kPa 3 5 inch WC 0 87 kPa M...

Страница 28: ...to insure its function When the temperature reaches the limit set point all heat is shutoff The limit control has a built in auto reset that comes on when the equipment is sufficiently cooled down Ref...

Страница 29: ...Main burners are lit at 50 percent of unit s rated input 7 The fan time delay relay optional allows the heat exchanger to come up to operating temperature At this time the fan time delay closes and a...

Страница 30: ...voltage This working voltage determines the position of the modulating valve With no voltage applied to the valve the valve will be full open and full fire will occur As increasing voltage is applied...

Страница 31: ...ermostat setting The fan time delay relay allows the unit to fire for a period of 60 seconds before fan operation It also allows the fan to operate for 120 seconds after burner shutdown Constant Fan O...

Страница 32: ...i in nj ju ur ry y a an nd d p pr ro op pe er rt ty y d da am ma ag ge e A A u un ni it t s sh ho ou ul ld d n ne ev ve er r b be e a al ll lo ow we ed d t to o c cy yc cl le e o on n t th he e p pr...

Страница 33: ...ently attached to the unit for the pilot system supplied with the unit To set the intermittent pilot ignition system in operation proceed as follows 1 Turn on the main manual valve and pilot valve 2 T...

Страница 34: ...7kPA 10 inch WC 2 49 kPA HIGH TEMP RISE FURNACE 30 90 F STD TEMP RISE FURNACE 20 60 F NOT AVAILABLE FT3 HR ORIFICE DRILL FT3 HR ORIFICE DRILL FT3 HR ORIFICE DRILL FT3 HR ORIFICE DRILL FT3 HR ORIFICE D...

Страница 35: ...primary air flow to the burners Turn the friction locked manually rotated air shutters clockwise to close or counterclockwise to open For correct air adjustment close the air shutter until yellow tips...

Страница 36: ...t firing remove the pilot adjustment cap 2 Adjust the pilot screw to provide properly sized flame 3 A proper pilot flame is a soft steady flame that envelopes 3 8 to 1 2 inch 9 5 to 12 7 mm of the fla...

Страница 37: ...of the gas from the local utility This should be in BTU per cubic foot MJ m3 2 Determine the cubic feet per minute of the gas as shown in the following example The rating plate input should be taken f...

Страница 38: ...l le ec ct tr ri ic c p po ow we er r i in nc cl lu ud di in ng g r re em mo ot te e d di is sc co on nn ne ec ct ts s b be ef fo or re e s se er rv vi ic ci in ng g F Fo ol ll lo ow w p pr ro op pe e...

Страница 39: ...ter to that tapping Turn the manual valve on to apply pressure to the combination control Note the pressure reading on the manometer then turn the valve off A loss of pressure indicates a leak If a le...

Страница 40: ...at te er ri ia al ls s c co ou ul ld d c ca au us se e a a f fi ir re e w wh hi ic ch h c co ou ul ld d r re es su ul lt t i in n d de ea at th h o or r s se er ri io ou us s i in nj ju ur ry y o or...

Страница 41: ...MUA SVX004B EN 41 Figure 16 Natural Vent Duct Furnace Figure 17 Power Vent Duct Furnace M Ma ai in nt te en na an nc ce e...

Страница 42: ...3 Reset manifold pressure Refer to operation 4 Supply piping is inadequately sized Refer to installation 5 Clean pilot orifice Refer to operation Pilot will not light or will not stay lit 1 Main gas o...

Страница 43: ...plier for proper orifice size and replace Refer to operation Flame pops back Excessive primary air 1 Close air shutter Refer to Operation 2 Check with local gas supplier for proper orifice size and re...

Страница 44: ...tat heat anticipation for longer cycles Refer to operation 3 Check for proper air supply across heat exchanger 4 Relocate thermostat Do not mount thermostat on unit Not enough heat 1 Incorrect gas inp...

Страница 45: ...power venter motor 3 Clean power venter wheel blade 4 Realign power venter wheel Power venter will not run 1 Loose wiring 2 Defective motor overload protector or defective motor 3 Defective power vent...

Страница 46: ...lled controls been installed Do you understand all the controls on this equipment If not contact your wholesaler or rep BLOWER GAS HEATING With power and gas off Make certain all packing has been remo...

Страница 47: ...MUA SVX004B EN 47 N No ot te es s...

Страница 48: ...For more information please visit trane com or tranetechnologies com Trane has a policy of continuous product and product data improvements and reserves the right to change design and specifications w...

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