CarrierメーカーAQUAFORCE 30XA080-500の使用説明書/サービス説明書
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Manufacturer reserves the right to disco ntinue, or change at any time, specifications or de signs without notice and without inc urring obligations. Catalog No . 04-533000 26-01 Printed in U .S. A. Fo rm 30XA-10SI Pg 1 11-09 Replaces: 30XA-5SI Installation Instr uctions CONTENTS Page SAFETY CONSIDERA TIONS .
2 Step 2 — Place, Mount, and Rig the Unit — When considering a location for the unit, be sure to consult NEC (National Electrical Code , U.S.A.) and/or local code requirements. Allow sufficient space for airflow , wiring, pip- ing, and service. See Fig.
3 Fig. 1 — AquaForce ® Chiller Model Number Designation a30-4401 LEGEND CFSP — Coil F ace Shipping Pr otection EMM — Energy Management Module LON — Local Oper ating Netw ork MCHX — Microcha.
4 3 .9 3 7.88 [200] DE T AIL "A" MOUNTING PLATE CONTACT S URFACE TYPICAL 4 PLACE S [100] MOUNTING HOLE 0.875 DIA.[22.2] MOUNTING PLA TE 1.50 DIA. [ 3 8.1] RIGGING HOLE [127] 5.0 [ 33 ] 1. 3 1 1.75 [44] [1114] [1729] [2236] [508] [1670] [3587] [3078] [148] [2769] [80] [863] Fig.
5 5" Vict au lic Entering W a ter 5" Vict au lic Le a ving W a ter 90.55 [2 3 00] 19.06 [484] 10.8 [274] 88.04 [22 3 6] 68.06 [1729] [1223] [147] [2300] [1199] [564] [2236] [863] [874] [531] [564] [881] 8.
6 A [1475] [1729] [2236] [913] [508] [1270] [4780] [3070] B [140] [2769] [80] [863] NO TES: 1. Unit must hav e clearances as f ollows: T op — Do n ot restrict Sides and Ends — 6 ft (1. 8 m) from solid surface. 2. T emperature relief devices are located on li q uid line and economizer assem- b lies and hav e 1 / 4 -in.
7 [2300] [1729] [2236] [274] [484] [2300] [1199] [564] [2236] [874] [863] [531] [564] [881] [147] [1223] [2300] [484] [274] [1982] [4780] [1982] [3070] [80] [564] [409] 8.
8 A [2032] [2173] [2236] [2242] [356] [1270] [4780] [4002] [3422] B [3048] [2769] [80] [863] NO TES: 1. Unit must ha ve clearances as f ollo ws: T op — Do not restr ict Sides and Ends — 6 ft (1. 8 m) from solid surface . 2. T emperature relief devices are located on li q uid line and economizer assem- b lies and ha v e 1 / 4 -in.
9 90.55 [2 3 00] 19.06 [484] 10.27 [261] 88.04 [22 3 6] 88.28 [2242] 85.56 [217 3 ] 5" Vict au lic Le a ving W a ter 5" Vict au lic Enter ing W a ter [147] [1223] [881] [564] [531] [863] [874] [2173] [2236] [2242] [261] [484] [564] [1199] [2300] 3 /4 NPT Relief Conn.
10 [2300] [541] [269] [5975] [1475] [863] [3086] [2769] [409] [2410] [1872] [162] [397] [148] [2769] [508] B [3086] [3810] [5975] [508] [885] [2236] [1756] [1502] A NO TES: 1. Unit must hav e clearances as f ollo ws: T op — Do not rest rict Sides and Ends — 6 ft (1.
11 [132] [1500] [5975] [1872] [2409] [2410] [2833] [2300] [748] [614] [532] [208] [2300] [748] [208] [162] [397] [1756] [2236] [541] [269] a30-4407 3 .9 3 7.88 [200] DE T AIL "A" MOUNTING PLATE CONTACT S URFACE TYPICAL 4 PLACE S [100] MOUNTING HOLE 0.
12 [748] [208] [162] [397] [2236] [2270] [541] [2300] A [2032] [2174] [2236] [2270] [356] [1270] [2769] [397] [162] [1872] [2410] [5975] [4162] [3431] [3048] B 3 /4 NPT Relief Conn.
13 [559] [541] [2174] [2236] [2270] [162] [397] [208] [748] [2300] a30-4407 3 .9 3 7.88 [200] DE T AIL "A" MOUNTING PLATE CONTACT S URFACE TYPICAL 4 PLACE S [100] MOUNTING HOLE 0.875 DIA.[22.2] MOUNTING PLA TE 1.50 DIA. [ 3 8.1] RIGGING HOLE [127] 5.
14 [459] [1475] [863] [1982] [4502] [7168] [1982] [287] [571] [2300] [1555] [2769] B [4502] [7168] [914] [508] [860] [162] A [1528] [1782] [2236] NO TES: 1. Unit must hav e clearances as f ollows: T op — Do n ot restrict Sides and Ends — 6 ft (1. 8 m ) f r o m s o l i d surf ace.
15 [2300] [748] [208] [162] [397] [1782] [2236] [287] [571] [2300] [748] [532] [208] [1500] [3013] [3551] [3552] [3975] [7168] [132] [614] a30-4174 3 .9 3 7.88 [200] DE T AIL "A" MOUNTING PLATE CONTACT S URFACE TYPICAL 4 PLACE S [100] MOUNTING HOLE 0.
16 3 /4 NPT Relief Conn. Fem a le 6" Vict au lic Entering W a ter 6" Vict au lic Le a ving W a ter Cooler V ent 3 /8 NPT Cooler Dr a in 3 /8 NPT Mo u nting Hole s Rigging Hole s ( S ee Det a il A) 90.55 [2 3 00] 22.48 [571] 11. 3 [287] 3 29.
17 [1500] [748] [614] [532] [208] [132] [2300] [4260] [4798] [4799] [5221] [8363] a30-4176 3 .9 3 7.88 [200] DE T AIL "A" MOUNTING PLATE CONTACT S URFACE TYPICAL 4 PLACE S [100] MOUNTING HOLE 0.875 DIA.[22.2] MOUNTING PLA TE 1.50 DIA. [ 3 8.
18 3 /4 NPT Relief Conn. Fem a le 8" Vict au lic Entering W a ter 8" Vict au lic Le a ving W a ter Cooler V ent 3 /8 NPT Cooler Dr a in 3 /8 NPT Mo u nting Hole s Rigging Hole s ( S ee Det a il A) 90.55 [2 3 00] 2 3 .6 3 [600] 12.21 [ 3 10] 3 76.
19 [722] [614] [532] [208] [132] [1900] [9555] [6184] [5760] [5747] [5011] [2300] [2300] [722] [208] [317] [162] [1805] [2236] [600] [310] a30-417 8 3 .9 3 7.88 [200] DE T AIL "A" MOUNTING PLATE CONTACT S URFACE TYPICAL 4 PLACE S [100] MOUNTING HOLE 0.
20 3 /4 NPT Relief Conn. F em a le 8" Vict au lic Entering W a ter 8" Vict au lic Le a ving W a ter Cooler V ent 3 /8 NPT Cooler Dr a in 3 /8 NPT Mo u nting Hole s Rigging Hole s ( S ee Det a il A) 90.55 [2 3 00] 2 3 .6 3 [600] 12.21 [ 3 10] 42 3 .
21 [2300] [6205] [6941] [6954] [7378] [10750] [1900] [722] [614] [532] [208] [132] a30-41 8 0 3 .9 3 7.88 [200] DE T AIL "A" MOUNTING PLATE CONTACT S URFACE TYPICAL 4 PLACE S [100] MOUNTING HOLE 0.875 DIA.[22.2] MOUNTING PLA TE 1.50 DIA. [ 3 8.
22 [2300] [455] [1779] [2236] [162] [317] [208] [722] 3 /4 NPT Relief Conn. F em a le 8" Vict au lic Entering W a ter 8" Vict au lic Le a ving W a ter Cooler V ent 3 /8 NPT loc a ted in cooler he a d s Cooler Dr a in 3 /8 NPT loc a ted in cooler he a d s Mo u nting Hole s Rigging Hole s ( S ee Det a il A) 90.
23 [2300] [722] [208] [162] [317] [1831] [2236] [455] [2300] [132] [208] [532] [614] [722] [3013] [3749] [3763] [4186] [1900] [7789] [8328] [8653] [11944] [1500] [424] [208] [132] a30-41 8 2 BACK VIEW RIGHT END VIEW 3 .9 3 7.88 [200] DE T AIL "A" MOUNTING PLATE CONTACT S URFACE TYPICAL 4 PLACE S [100] MOUNTING HOLE 0.
24 NO TES: 1. Unit must hav e clearances as f ollo ws: T op — Do not restrict Sides and Ends — 6 ft (1. 8 m ) f r o m s o l i d surf ace . 2. T emperature relief devices are located on li q - uid line and economizer assem b lies and hav e 1 / 4 -in.
25 [1500] [1900] [11944] [8653] [8328] [7789] [4186] [3763] [3749] [3013] [132] [208] [532] [614] [722] [2300] [424] [208] [132] a30-41 8 2 BACK VIEW RIGHT END VIEW 3 .9 3 7.88 [200] DE T AIL "A" MOUNTING PLATE CONTACT S URFACE TYPICAL 4 PLACE S [100] MOUNTING HOLE 0.
26 3 /4 NPT Relief Conn. Fem a le 8" Vict au lic Entering W a ter 8" Vict au lic Le a ving W a ter Cooler V ent 3 /8 NPT loc a ted in cooler he a d s Cooler Dr a in 3 /8 NPT loc a ted in cooler he a d s Mo u nting Hole s Rigging Hole s ( S ee Det a il A) 90.
27 [2300] [722] [614] [532] [132] [208] [1900] [3670] [4406] [4419] [4843] [8983] [9521] [9846] [13138] [1500] [424] [208] [132] a30-41 8 4 BACK VIEW RIGHT END VIEW 3 .9 3 7.88 [200] DE T AIL "A" MOUNTING PLATE CONTACT S URFACE TYPICAL 4 PLACE S [100] MOUNTING HOLE 0.
28 NO TES: 1. Unit must hav e clearances as f ollows: T op — Do no t restrict Sides and Ends — 6 ft (1. 8 m ) f r o m s o l i d surf ace. 2. T emperature relief devices are located on li q uid line and economizer assem b lies and hav e 1 / 4 -in. flare connection.
29 [2300] [722] [614] [532] [132] [208] [1900] [3670] [4406] [4419] [4843] [8983] [9521] [9846] [13138] [1500] [424] [208] [132] a30-41 8 4 BACK VIEW RIGHT END VIEW 3 .9 3 7.88 [200] DE T AIL "A" MOUNTING PLATE CONTACT S URFACE TYPICAL 4 PLACE S [100] MOUNTING HOLE 0.
30 Fig. 15A — Unit Mounting Weights (Units with MCHX Condenser Coils ) UNITS WITHOUT PUMPS — ENGLISH UNITS WITHOUT PUMPS — SI 30XA UNIT SIZE MOUNTING WEIGHT (lb) MCHX CONDENSER COILS ABCD T o t .
31 A B D C COOLER S IDE COMPRE SS OR S IDE A B C F E D COOLER S IDE COMPRE SS OR S IDE A B C D H G F E COOLER S IDE COMPRE SS OR S IDE A B C D E G F H J I COOLER S IDE COMPRE SS OR S IDE A B C D E F L.
32 SINGLE PUMP UNITS — ENGLISH SINGLE PUMP UNITS — SI 30XA UNIT SIZE MOUNTING WEIGHT (lb) MCHX CONDENSER COIL S ABCDE F T o t a l 090 1201 2754 10 8 7 900 1944 1199 90 8 5 100 1226 2 8 14 1123 924.
33 DU AL PUMP UNIT S — ENGLISH DU AL PUMP UNITS — SI 30XA UNIT SIZE MOUNTING WEIGHT (lb) MCHX CONDENSER COIL S ABCDE F T o t a l 090 1201 2962 1176 900 1944 1199 93 8 2 100 1226 3022 1212 924 1995.
34 Fig. 15B — Unit Mounting Weights (U nits with Al/Cu Condenser Co ils) UNITS WITHOUT PUMPS — ENGLISH *Condenser Coil: Aluminum Fins/Coppe r T u b ing.
35 A B D C COOLER S IDE COMPRE SS OR S IDE A B C F E D COOLER S IDE COMPRE SS OR S IDE A B C D H G F E COOLER S IDE COMPRE SS OR S IDE A B C D E G F H J I COOLER S IDE COMPRE SS OR S IDE A B C D E F L.
36 SINGLE PUMP UNITS — ENGLISH SINGLE PUMP UNITS — SI *Conden ser Coil: Alum inum Fins/Copper T u b ing. 30XA UNIT SIZE MOUNTING WEIGHT (lb) — Al/Cu* ABCDE F T o t a l 090 1273 2 8 9 8 1160 972 .
37 DU AL PUMP UNIT S — ENGLISH DU AL PUMP UNITS — SI *Conden ser Coil: Alum inum Fins/Copper T u b ing. 30XA UNIT SIZE MOUNTING WEIGHT (lb) — Al/Cu* ABCDE F T o t a l 090 1273 3106 124 8 972 20 .
38 Fig. 15C — Unit Mounting Weights (U nits with Cu/CU Condenser Co ils) UNITS WITHOUT PUMPS — ENGLISH *Condenser Coil: Copper Fins/Co pper T u b i ng.
39 A B D C COOLER S IDE COMPRE SS OR S IDE A B C F E D COOLER S IDE COMPRE SS OR S IDE A B C D H G F E COOLER S IDE COMPRE SS OR S IDE A B C D E G F H J I COOLER S IDE COMPRE SS OR S IDE A B C D E F L.
40 SINGLE PUMP UNITS — ENGLISH SINGLE PUMP UNITS — SI *Condenser Coil: Copper Fins/Copper T u b ing. 30XA UNIT SIZE MOUNTING WEIGHT (lb) — Cu/Cu* ABCDE F T o t a l 090 1394 3139 12 8 0 1093 2 33.
41 RIGGING UNIT (See Fig . 16-18) — The 30XA080-500 units are designed for overhead rigging and it is important that this method be used. Holes are provi ded in frame base channels, marked for rigging (see rigging label on unit). Field-supplied shackles are required to facilita te lifting.
42 Table 1A — Physical Data, 30XA080-500 — Englis h LEGEND *Operating weight includes 2 pumps on models 30XA090- 160. No pumps are a vaila b le on 30XA0 8 0 or 30XA1 8 0-500. All weights i nclude coil trim panels . See Fig. 15A and 15B f or mount- ing weights for uni ts without pumps a nd units with singl e pump pack ages.
43 Table 1B — Physical Data, 30XA08 0-500 — SI LEGEND *Operating weight includes 2 pumps on models 30XA090- 160. No pumps are a vaila b le on 30XA0 8 0 or 30XA1 8 0-500. All weights incl ude coil trim panels. See Fig. 15A and 15B f or mount- ing weights for uni ts without pumps a nd units with singl e pump pack ages.
44 T ALL PANEL S MU S T BE IN PLACE WHEN RIGGING. DO NOT ATTEMPT TO FORK THE S E UNIT S IF NO S KID I S S UPPLIED. CA U T I O N - NOTICE T O RIGGER S : NOTE S : 1. 1.50 di a . ( 3 8.1mm) lifting hole s provided for field su pplied clevi s . 2. Rig with a minim u m of 25 ft (7620mm) length ch a in s or c a ble s .
45 Table 2 — Num ber of Lifting Po ints for 30XA080-50 0 ALL PANEL S MU S T BE IN PLACE WHEN RIGGING. DO NOT ATTEMPT TO FORK THE S E UNIT S IF NO S KID I S S UPPLIED. CA U T I O N - NOTICE T O RIGGER S : NOTE S : 1. 1.50 di a . ( 3 8.1mm) lifting hole s provided for field su pplied clevi s .
46 Minimum Loop V olume — The preferred minimum loop vol- ume is dependent on the type of application. In order to obtain leaving water temperature stability for comfort cooling appli- cations, a minimum of 3 gallons per ton (3.25 liters per kW) is required on all unit sizes.
47 GA TE V AL VE* STRAINER* VIBRA TION ELIMINA T ORS* BALANCING V AL VE/ SHUT OFF* POWER FD FD CONTROL PRESSURE/ TEMPERA TURE T APS* PUMP DRAIN SHUTOFF VA LV E NO TES: 1.
48 l i o C r e l o o C w e i V e d i S Di s t a nce to Entering W a ter Connection g n i v a e L r e t a W Top View Height Le a ving W a ter Connection Height Entering W a ter Connection Di s t a nce .
49 S LA VE CHILLER CONTROL BO X PUMP MA S TER CHILLER CONTROL BO X Fig. 22 — Serie s Dual Chiller Ope ration LEGEND LW T — Leaving W ater T emperature Field-Installed Communicati on Bus (slashes i.
50 FLOW SWITCH Fig. 23 — Flow Switch a30-413 8 BAD BAD GOOD GOOD Fig. 24 — T ank Baffling a30-31 8 5 PT PT T1 T2 F S PP PP D D V D PT PT Chilled W a ter In Chilled W a ter O u t He a ter He a ter .
51 NOTE: It is recommended for units with the hy dronic package that an inlet isolation (shut-off) valve be placed exterior to the unit to allow removal and service of the entire pump assembly , if necessary . The hydronic package is supplied from the factory with a combination valve for isolation of leaving water .
52 The combination valve performs the following functions: • drip-tight shut-off valve • spring closure design with a non-slam check valve • flow-throttling valve When facing the cooler side of unit, the inlet (return) water connection is on the bottom.
53 CO O LE R P U MP C ON T R OL — It is required that cooler pump control be utilized on all chillers unless the chilled water pump runs continuously or the chilled water system contains a suitable antifreeze solution. Cont rol of dual external pumps re- quires installation of the extern al pump control accessory pack- age (Part No.
54 Table 3 — 30XA Minimum and Maximum Cooler Flow Ra tes * For applications re q uiring cooler leaving water temperature operation at less than 40 F (4.4 C), the units re q uire the use of antifreeze and application may re q uire one of the special order b rine option.
55 Low Ambient T emperature Head Pressure Control — If the unit is equipped with the low ambient temperature head pres- sure control option, field-fabr icated and field-installed wind baffles are required if the wind velocity is anticipated to be greater than 5 mph (8 km/h).
56 Step 4 — Fill the Chilled W ater Loop. The chilled water pump (if equipped) is rated for 150 psig (1034 kPa) duty . The m aximum cooler fluidside pressure is 300 psig (2068 kPa). Check the pressure rating for all of the chilled water devices installed.
57 NOTE: Do not use automobile anti-freeze, or any other fluid that is not approved for heat exchanger duty . Only use appro- priately inhibited glycols, concentrated to provide adequate protection for the temperature considered.
58 0 20 40 60 80 100 120 140 160 0 100 200 3 00 400 500 GPM Av a il a ble He a d (Feet) 1 2 3 4 0 20 40 60 80 100 120 140 160 0 100 200 3 00 400 500 GPM Av a il a ble He a d (Feet) 1 2 4 3 0 20 40 60 .
59 30XA090,100 30XA110 30XA120 30XA140 30XA160 Selection Pump 7 Dual 5HP 8 Dual 7.5HP B Dual 10HP C Dual 15HP Fig. 34 — 30XA090- 160 Dual Pump En v elope Curves a30-4436 a30-4437 a30-443 8 a30-4439 .
60 0 0.00 100 6. 3 1 200 12.62 3 00 18.9 3 400 25.24 500 3 1.54 (gpm) (l/ s ) (0.0) 0 (9.1) 3 0 (18. 3 ) 60 (27.4) 90 ( 3 6.6) 120 (45.7) 150 He a d Pre ssu re (m) ft of Fl u id 3450 RPM N P S H r 4.75 in 5.00 in 5.25 in 5.50 in 5.75 in 77 77 74 74 70 70 62 62 52 52% 3 9 NP S Hr 3 hp 5 hp 7.
61 PUMP MODIFICA TION/TRI M MI N G — Since the pumps are constant speed, the only way to obtain greater flow with a given pump/impeller is to decrease system head. This will allow the pump to “ride” its curve to the right, resulting in increased flow .
62 Step 5 — Make Electrical Connection s PO W E R S U PP L Y — The electrical characteristics of the available power supply must agree with the unit nameplate rating. Supply voltage must be within the limits shown. See T ables 5-1 1 for electrical and configuration data.
63 ICE DONE DEMAND LIMIT STEP 2 OCCUPANCY OVERRIDE DUAL SETPOINT 12 3 456 7 8 9 10 11 12 13 14 15 TB5 TB6 12 3 456 7 8 9 10 11 12 13 14 15 EMM FIOP/ ACCESSORY REMOTE ON/OFF SEE NOTE 3 A + COM - SHLD D.
64 Table 5 — 30XA080 -500 Electrical Data, Single Poi nt (Standard Con denser Fan Motors) LEGEND NOTES: 1. Units are suita b le for use on electrical systems where voltage supplied to th e unit ter- minals is not b elow o r a b ov e the li sted minim um and max imum li mits.
65 Table 5 — 30XA080-500 Electrical Data, Sing le Point (Standard Condenser Fan Mot ors) (cont) LEGEND NOTES: 1. Units are suita b le for use on electrical systems where voltage supplied to th e unit ter- minals is not b elow o r a b ov e the li sted minim um and maxim um limit s.
66 Table 6 — 30XA080-500 Electrical Data, Dual Point (St andard Condenser Fan Motors) LEGEND NOTES: 1. Units are suita b le for use on electrical systems where voltage supplied to the unit terminals is not b elow or a b ove the listed minimum and maximum limits.
67 Table 6 — 30XA080- 500 Electri cal Data, Dual Poi nt (Standard Condens er Fan Motors) (co nt) LEGEND NOTES: 1. Units are suita b le for use on electrical systems where voltage supplied to the unit terminals is not b elow or a b ove the listed minimum and maximum limits.
68 Table 6 — 30XA080- 500 Electri cal Data, Dual Poi nt (Standard Condens er Fan Motors) (co nt) LEGEND NOTES: 1. Units are suita b le for use on electrical systems where voltage supplied to the unit terminals is not b elow or a b ove the listed minimum and maximum limits.
69 Table 7 — 30XA140-5 00 Electri cal Data , Si ngle Point (High Ambient Option) LEGEND NOTES: 1. Units are suita b le for use on electrical systems where voltage supplied to th e unit ter- minals is not b elow o r a b ov e the li sted minim um and maxim um limit s.
70 Table 7 — 30XA140-5 00 Electrical Dat a, Single Point (Hig h Ambient Option) (con t) LEGEND NOTES: 1. Units are suita b le for use on electrical systems where voltage supplied to th e unit ter- minals is not b elow o r a b ov e the li sted minim um and max imum li mits.
71 Table 8 — 30XA140-500 Elect rical Data, Dual Point (High Ambient Option) LEGEND NOTES: 1. Units are suita b le for use on electrical systems where voltage supplied to the unit terminals is not b elow or a b ove the listed minimum and maximum limits.
72 Table 8 — 30XA140-5 00 Electri cal Data, Dual Point (High Ambient Option) (cont) LEGEND NOTES: 1. Units are suita b le for use on electrical systems where voltage supplied to the unit terminals is not b elow or a b ove the listed minimum and maximum limits.
73 Table 8 — 30XA140-500 Electric al Data, Dual Po int (High Ambient Opti on) (cont) LEGEND NOTES: 1. Units are suita b le for use on electrical systems where voltage supplied to the unit terminals is not b elow or a b ove the listed minimum and maximum limits.
74 Table 9 — Power and Control Conn ections *COMBI b o x is located at the end of the unit. †PEB1 and PEB2 b ox es are located on the side of the unit. If b oth b o x es are used, the one on the left (viewing from the front of the b ox es) is PEB1.
75 Table 10 — Compressor and Fan Ele ctrical Data LEGEND *Quantity of fan motors for incoming power supply Circuit 1/ Circuit 2. NOTES: 1. For 30XA0 8 0-350 units with dual po wer suppl y , main power supply 1 us es refrigerant circuit A comp onents to calcu late MCA and MOCP .
76 Table 11 — Pump Electrical Da ta FLA — Full Load Amps Table 12 — CCN Communication Bus Wiring 4. The RJ14 CCN connector on TB3 can also be used, but is only intended for temporary connection (for example, a laptop computer running service tool).
77 Step 6 — Install Accessories — A number of acces- sories are available to provide the following opti onal features (for details, refer to the Controls and T roubleshooting guide shipped with the unit).
78 REFRIGERANT CHARGE The liquid charging method is recommended for complete charging or when additional char ge is required. The 30XA units are shipped from the factory with a full charge of R-134a. The unit should not need to be char ged at installation unless a leak was detected in Step 6 — Leak T est Unit section.
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Manufacturer reserves the right to disco ntinue, or change at any time, specificatio ns or designs without notice and without inc urring obligations. Catalog No .
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