technical guide for: indoor mounted units to 64,000 cfm and...
Post on 11-Feb-2019
220 Views
Preview:
TRANSCRIPT
SDFI Direct FiredGas Heating SystemSDFI Direct FiredGas Heating System
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
Warm
Sterling
Keeps You
TGSDFI-2
Technical Guide for:
Indoor Mounted UnitsTo 64,000 CFMAnd 9M BTUH
○
○
○
○
○
○
○
○
○
○
○
○
HVAC PRODUCTS
○
○
○
○
○
○
○
○
○
○
○
○
○
2
HVAC PRODUCTS
Sterling
Keeps You
Warm
Sterling
Keeps You
Warm
In the business of commercial and industrial operations, efficient and low-cost heating isessential. Sterling keeps you warm for less.
Since 1946, Sterling has been providing cost-effective, reliable HVAC heating solutions. Ourproven Direct Fired Gas Heating System adds warm, fresh and clean air to your workenvironment for greater comfort and productivity.
This Technical Guide will help you choose an Sterling Direct Fired Gas Heating System toprovide efficient, cost-effective heating for your warehouse, factory or process operation. TheGuide covers:
• Technical Specifications — Configure the right system components (e.g., burner,motors, drive, filter, options, etc.) to meet your needs.
• Installation Information — Plan details of on-site installation with dimensionalinformation and cabinet arrangement diagrams.
If you have questions, please contact Sterling’s Customer Service Department at214-638-6010. We’ll be glad to help.
SDFI Direct FiredGas Heating SystemTechnical Guide
○
○
○
○
○
○
○
○
○
○
○
○
○
3
HVAC PRODUCTS
Table of Contents
Air Delivery Tables .................................................... 4-5
Burner Performance Table ....................................... 6-7
Dimensions
Horizontal Units ............................................. 8-9
Vertical Units .............................................. 10-11
Return Air Sections .......................................... 12
Filter Banks ...................................................... 13
Inlet Dampers .................................................. 14
Discharge Louvers ........................................... 15
Control Systems .................................................... 16-19
Typical Wiring Diagram ........................................ 20-21
Amp Draw Table ........................................................ 22
Sequence of Operation.............................................. 22
Typical Gas Piping Layout ......................................... 23
Cabinet Arrangements .............................................. 24
Unit Weights .............................................................. 24
Guide Specification – Basic Unit ................................. 25
Guide Specification – Mixing DampersWith Return Air Flow System ......................................... 26
Guide Specification – BACview Controller ................... 27
4
1/4”HP11
11/2
23
11/2
22332333355555555
71/2
571/2
71/2
71/2
—71/2
71/2
71/2
10151010151520
3/8”HP11
11/2
2322233233555555555
71/2
71/2
571/2
71/2
1010
71/2
71/2
71/2
10151015151520
1/2”HP1
11/2
11/2
2322333333555555555
71/2
71/2
71/2
71/2
71/2
1010
71/2
71/2
71/2
10151015151520
3/4”HP1
11/2
11/2
232233333355555
71/2
571/2
71/2
71/2
71/2
71/2
71/2
101010
71/2
101010151515152020
1”HP—11/2
233233333355555
71/2
71/2
71/2
71/2
71/2
71/2
71/2
71/2
71/2
10101510101015151515202020
2”HP——33533555
—55
71/2
71/2
71/2
71/2
71/2
10——101010—15151515———1520—20252530
11/2”HP—22333335555555
71/2
71/2
71/2
71/2
71/2
71/2
71/2
10101010101515—151515151520202025
11/4”HP—11/2
23333335355555
71/2
71/2
71/2
71/2
71/2
71/2
71/2
1071/2
10101515—101515151515202025
Air Delivery Table
Blower HP Selection
160019002200260030003250350037504000425045005000550060006500700075008000850090009500
10,00010,50011,00011,00012,00013,00014,00015,00014,00015,00016,00018,00020,00022,00024,00026,00028,00030,000
Total External Static Pressure (W.C.)FPMOutlet
Velocity
CFMStd. Air@ 70°
UnitModel
NOTE:The horsepower selections are based on system externalstatic pressure. One or more of the following must be addedwhen applicable.
A. Motor Operated Inlet Damper .13’’ W.C.
B. V-Bank Filter Section .25’’ W.C.
C. Discharge Louver .13’’ W.C.
191422732632311035892257243126042778295122392488273629852265243926132787296221432262238125002619215723532549274529412086223523852683298124862581279630113226
SELECTION GUIDE1. Determine the required amount of replacement air
(CFM) by computing the total amount of air beingexhausted. (Restaurants should be sized for 90% ofexhaust air to minimize food odors.)
2. Determine the total external static pressure by addingthe pressure drops through all accessories and ducts.
3. Select unit sizes and motor horsepowerfrom table.
109
112
115
118
120
122
125
130
5
2”HP————101015———151520——2020202025252525252530303030——30304040404050——50505060
11/2”HP——71/2
71/2
101010——1515151515151520202020202520202525252530—2525303030404040—4040405050
11/4”HP—71/2
71/2
71/2
71/2
1010—101015151515151515152020202020202025252525202525253030304040303040405050
1”HP5
71/2
71/2
71/2
71/2
71/2
1071/2
101010151515151515151520202020202020252525202020252530304040253040404050
3/4”HP55
71/2
71/2
71/2
71/2
71/2
71/2
71/2
1010101510101515151515202015202020202025152020202525303040252530404050
1/2”HP555
71/2
71/2
71/2
71/2
71/2
71/2
71/2
10101010101015151515152015151520202020151520202025253030202530304040
3/8”HP5555
71/2
71/2
71/2
71/2
71/2
71/2
10101010101015151515152015151520202020151520202025253030202525304040
22392363248826122736286129852178226524392613278729622143226223812500261927382857297630952451254926472745284329413039223523852534268328322981313032793428236625812796301132263441
1/4”HP55555
71/2
71/2
71/2
71/2
71/2
71/2
1010
71/2
101010151515151515151515202020151515202020252530202025304040
90009500
10,00010,50011,00011,50012,00012,50013,00014,00015,00016,00017,00018,00019,00020,00021,00022,00023,00024,00025,00026,00025,00026,00027,00028,00029,00030,00031,00030,00032,00034,00036,00038,00040,00042,00044,00046,00044,00048,00052,00056,00060,00064,000
Air Delivery Table
Blower HP SelectionFPM
OutletVelocity
CFMStd. Air@ 70°
UnitModel
Total External Static Pressure (W.C.)
215
218
220
222
225
230
6
100°RISE
191 227 263 311 358 388 418 448 478 508 537 597 657 717 776 836 896 9551015107511351194125413141314143315531672179116721791191120302150238826272866310533443583
160019002200260030003250350037504000425045005000550060006500700075008000850090009500
10,00010,50011,00011,00012,00013,00014,00015,00014,00015,00016,00017,00018,00020,00022,00024,00026,00028,00030,000
110°RISE
206 245 284 335 387 419 451 483 516 548 580 644 709 773 838 902 96710311096116012241289135314181418154716761804193318041933206221912320257828363093335136093867
Single Blower Models
Burner Performance Table
UnitModel
CFMStd. Air@ 70°
120°RISE
221 262 304 359 414 449 483 518 552 587 621 690 759 828 897 96610351104
11733124213111380144915181518165617941932207019322070220823462484276030363312358838644140
90°RISE
175 208 241 285 329 356 384 411 438 466 493 548 603 658 712 767 822 877 932 98610411096115112051205131514251534164415341644175318631973219224112630284930693288
80°RISE
159 189 219 258 298 323 348 373 397 422 447 497 546 596 646 696 745 795 845 894 944 994104310931093119212921391149013911490159016891788198721862385258327822981
70°RISE
142 169 195 231 266 288 311 333 355 377 399 444 488 532 577 621 665 710 754 798 843 887 932 976 976106511531242133112421331141915081597177419522129230724842661
109
112
115
118
120
122
125
130
130°RISE
235 279 323 382 440 477 514 550 587 624 661 734 807 881 9541027110111741248132113941468154116151615176119082055220220552202234924952642293632293523381641104404
SELECTION GUIDE1. Determine the temperature rise required
through the heater by subtracting the winterdesign temperature from the desired indoortemperature.
3. Values shown in above MBH Input Tablesare based on -40° F Inlet Temperature.MBH input shown on unit rating plate willbe corrected for actual air density.
4. Natural gas units are limited to 130° Ftemperature rise, propane units are limitedto 100° F temperature rise.
2. Select burner required.BTUH = SCFM x 1.32605 x 29.92 x 0.24 x 60 x Temperature Rise .92 (460 + Temperature Rise + Inlet Temperature)
where 1.32605 = density of air handled by the blower29.92 = barometric pressure at sea level0.24 = specific heat of the air handled by the blower60 = conversion for minutes to hour0.92 = average ratio of net and gross heating values of common fuel
gases (92% sensible, 8% latent)
7
100°RISE
1075113511941254131413731433155316721791191120302105226923882508262727472866298631052986310532243344346335833702358338224060429945384777501652555494525557326210668871657643
80°RISE
894 944 9941043109311431192129213911490159016891788188819872087218622852385248425832484258326832782288129813080298131803378357737763974417343724571437247695167556459626359
Twin Blower Models
Burner Performance Table
120°RISE
1242131113801449151815871656179419322070220823462484262227602898303631743312345035883450358837263864400241404278414044164692496852445520579660726348607266247176772882808832
90°RISE
986104110961151120512601315142515341644175318631973208221922301241125212630274028492740284929593069317832883397328835073726394541644384460348225041482252605699613765757014
110°RISE
1160122412891353141814821547167618041933206221912320244925782707283629643093322233513222335134803609373838673996386741244382464048985156541356715929567161876702721877338249
215
218
220
222
225
230
CFMStd. Air@ 70°
UnitModel
70°RISE
798 843 887 932 97610201065115312421331141915081597168617741863195220402129221823072218230723952484257326612750266128393016319433713549372639034081390342584613496853235678
90009500
10,00010,50011,00011,50012,00013,00014,00015,00016,00017,00018,00019,00020,00021,00022,00023,00024,00025,00026,00025,00026,00027,00028,00029,00030,00031,00030,00032,00034,00036,00038,00040,00042,00044,00046,00044,00048,00052,00056,00060,00064,000
130°RISE
1321139414681541161516881761190820552202234924952642278929363082322933763523367038163670381639634110425744044550440446974991528455785871616564586752645870467633822088079394
8
A/R
A/S
A/S
O/A
A/R
S/A
S/A
109112115118120122125130
Single Blower Models – Horizontal Units
Dimensions
DimensionsModel
A2929
371/4
371/4
54546666
J81/4
81/4
141/4
141/4
141/4
141/4
201/4
201/4
P341/2
341/2
401/2
401/2
491/2
491/2
611/2
611/2
L233/4
233/4
393/4
393/4
483/4
483/4
483/4
483/4
M3434404049496161
F161/2
145/8
161/8
141/2
179/16
165/16
205/16
179/16
E101/2
133/8
1619
247/8
273/8
313/8
367/8
C3333434352526060
NOTE: All dimensions in inches subject to manufacturing tolerances.
C000498A
UNIT COMPONENTS 1. Inlet Damper 2. R/A section (before burner) 3. V-bank 4. Burner section
5. R/A section (after burner) 6. Blower section 7. Filter access 8. Adjustable profile
9. Control cabinet10. Access door (piping compartment)11. Gas piping manifold12. R/A access
13. Return air damper14. Belt guard15. Return air flow station
(required for ETL listedReturn Air Unit)
N251/8
251/8
401/4
401/4
491/8
491/8
491/8
491/8
K2828434352525252
H3030303048486060
B4545515160607272
D12
153/4
183/4
22247/8
273/8
313/8
367/8
9
A/R
A/S
A/S
O/A
A/R
S/A
S/A
S/A
9. Control cabinet10. Access door (piping compartment)11. Gas piping manifold12. R/A access
UNIT COMPONENTS 1. Inlet Damper 2. R/A section (before burner) 3. V-bank 4. Burner section
215218220222225230
Twin Blower Models – Horizontal Units
Dimensions
DimensionsModel
A371/4
371/4
54546666
H79799696
120120
M8282
109109133133
J1010
141/4
141/4
201/4
201/4
L393/4
393/4
483/4
483/4
483/4
483/4
F161/8
131/4
201/4
173/4
213/4
185/8
C434352526060
B9393
120120144144
P821/2
821/2
1091/2
1091/2
1333/8
1333/8
NOTE: All dimensions in inches subject to manufacturing tolerances.
C000497A
13. Return air damper14. Belt guard15. Return air flow station
(required for ETL listedReturn Air Unit)
5. R/A section (after burner) 6. Blower section 7. Filter access 8. Adjustable profile
N401/4
401/4
491/8
491/8
491/8
491/8
K434352525252
G221/2
221/2
295/8
295/8
375/8
33
D183/4
22247/8
273/8
313/8
367/8
E1619
247/8
273/8
313/8
367/8
10
K2828434352525252
109112115118120122125130
P341/2
341/2
401/2
401/2
491/2
491/2
611/2
611/2
Single Blower Models – Vertical Units
Dimensions
DimensionsModel
A2929
371/4
371/4
54546666
F161/2
145/8
161/8
141/2
179/16
165/16
205/16
179/16
L233/4
233/4
393/4
393/4
483/4
483/4
483/4
483/4
M3434404049496161
H3030303048486060
D12
153/4
183/4
22247/8
273/8
313/8
367/8
C3333434352526060
B4545515160607272
NOTE: All dimensions in inches subject to manufacturing tolerances.
C000500A
N251/8
251/8
401/4
401/4
491/8
491/8
491/8
491/8
E101/2
133/8
1619
247/8
273/8
313/8
367/8
J81/4
81/4
141/4
141/4
141/4
141/4
201/4
201/4
UNIT COMPONENTS 1. Inlet Damper 2. R/A section (before burner) 3. V-bank 4. Burner section 5. R/A section (after burner)
6. Blower section 7. Filter access 8. Adjustable profile 9. Control cabinet10. Access door
11. Gas piping manifold12. R/A access13. Return air damper14. Belt guard
15. Return air flow station(Required for ETL listedReturn Air Unit)
16. Screen
S171/4
171/4
171/4
2020202121
R3232323244444444
Q3636363648484848
S/A
A/S
R/A
R/A
S/A
O/A
11
6. Blower section 7. Filter access 8. Adjustable profile 9. Control cabinet10. Access door
215218220222225230
Twin Blower Models – Vertical Units
Dimensions
DimensionsModel
A371/4
371/4
54546666
E1619
247/8
273/8
313/8
367/8
N401/4
401/4
491/8
491/8
491/8
491/8
F161/8
131/4
201/4
173/4
213/4
185/8
J1010
141/4
141/4
201/4
201/4
D183/4
22247/8
273/8
313/8
367/8
C434352526060
B9393120120144144
P821/2
821/2
1091/2
1091/2
1333/8
1333/8
NOTE: All dimensions in inches subject to manufacturing tolerances.
C000499A
G221/2
221/2
295/8
295/8
375/8
33
H79799696
120120
K434352525252
L393/4
393/4
483/4
483/4
483/4
483/4
M8282
109109133133
UNIT COMPONENTS 1. Inlet damper 2. R/A section (before burner) 3. V-bank 4. Burner section 5. R/A section (after burner)
11. Gas piping manifold12. R/A access13. R/A air damper14. Belt guard
15. Return air flow station(Required for ETL listedReturn Air Unit)
16. Screen
S181/2
2222
231/2
323/4
323/4
Q363648484848
R323244444444
S/A
A/S
R/A
R/A
S/A
S/A
O/A
12
215-218393/4 x 82
10 x 79
ABCDE
Model
R/A Opening Size
Return Air Section
Dimensions
MODELDimension
220-22254
12052
491/8
1091/2
225-2306614452
491/8
1333/8
215-218371/4
9343
401/4
821/2
125-130667252
491/8
611/2
109-112294528
251/8
341/2
120-122546052
491/8
491/2
115-118371/4
5143
401/4
401/2
220-222483/4 x 109141/4 x 96
225-230483/4 x 133201/4 x 120
125-130483/4 x 61201/4 x 60
120-122483/4 x 49141/4 x 48
115-118393/4 x 40141/4 x 30
109-112243/4 x 3481/4 x 30
C000503
NOTE: R/A openings shall be centered on floor.NOTE: All dimensions in inches subject to manufacturing tolerances.
Before BurnerAfter Burner
13
Filter Dimensions
AB
ModelV-Bank Filter Qty.
& Size
V-Bank Filter and Filter Information
MODELDimension
220-22254
120
225-23066
144
215-218371/4
93
125-1306672
109-1122945
120-1225460
115-118371/4
51
215-218(18)
15 x 20 x 2
220-222(35)
16 x 20 x 2
225-230(42)
20 x 20 x 2
125-130(24)
16 x 20 x 2
120-122(10)
20 x 25 x 2
115-118(9)
16 x 20 x 2
109-112(4)
20 x 20 x 2
C000502
NOTE: All dimensions in inches subject to manufacturing tolerances.
14
AB
Inlet Damper
Dimensions
ModelDimension
109-1122945
215-218371/4
93
220-22254
120
225-23066
144
125-1306672
120-1225460
115-118371/4
51NOTE: All dimensions in inches subject to manufacturing tolerances.
C000501A
INLET DAMPER
15
DISCHARGE LOUVER
SIDE INLET
Dimensions
ABC
Discharge Louvers
NOTE: All dimensions in inches subject to manufacturing tolerances.
C000501A
ModelDimension
109-11221
2013/16
26
215-218257/32
703/4
233/8
220-222251/16
883/4
421/4
225-230251/16
1111/8
421/4
125-13045
417/8
403/4
120-12245
321/2
311/4
115-11824
2515/16
23
16
MDT Control System
Application:
Modulating DischargeTemperature Control
Control Systems
COMPONENT I.D.1. Unit DDC Controller2. Signal Conditioner
NET +
NET -
SHIELD
SENSE+12VRNCT+RNCT-GND
GNDRNET+RNET-+12V
TE
NR
0
98
765
4
3 2 1
LOCAL ACCESS
GND
INPUTS 1&205V,THERM OR DRY
INPUTS 3 & 4THERM OR DRY
GND
IN-5
IN-6
LED
INPUTS 5 & 6THERM DRY or LStat
CLASS 224 Vac. 50/60 CYCLE2Ova, 0.83AUSE COPPERCONDUCTORS ONLY.
CAUTION:To Reduce The Risk of Fire or or Electrical Shock, Do NotInterconnect Outputs of Different Class 2 Circuits
I/O ZONE 583
BT485Rx
Tx
+-
Batt
CR2032
Communications Selection
sneT
senO
mm
oC
Gnd
Hot
Format
LStat Rnet
Short PinsL StatIN-5 24 V ac
Power
Run
Error
IN-7
+3V
Gnd
IN-8
Pot.Only
Thermistor/Dry Contact0-5 vdc
On4321
EIA-485
BACnetover ARC 156
Comm SelectorDIP Switch
BAUD Rates SW1 SW2 PROTOCOLS SW1 SW2950019.2 K38.4K76.8 K
OFFOffOnOn
OffOnOffOn
BACnetMS/TPN2Modbus
Off
OnOff
Off
OffOn
Gnd
A0-3
Gnd
A0-2
A0-1
Gnd
DO-2
DO-1BUSPower for D.O.s
0-10vdc5ma Max.
BACnet
FormatJumper
LStat / Rnet PortSelector Jumper
Gain 1Jumper
CommunicationSelection Jumper
DO-3
DO-4
DO-5
GND
IN-4
IN-2
IN-3
IN-1
GND +
-
+
-
+
-
}
AO:
GND
0
98
7653 2 1
4
54
12
3
6
Discharge TemperatureSET Here
Includes:
Discharge air sensor 5 mounted in unit discharge with remote mounted 4 x 4box cover 6 including manual potentiometer to enable unit and adjust temperaturesetpoint, Fan On Light, Burner On Light and Cool On Light. Additional potentiometeris provided if optional return air damper section for manual or mixed air control isordered.
C000635
3. Modulating Gas Valve4. Inlet Air Sensor
5. Discharge Air Sensor6. Remote Control Station
17
Control Systems
MRT Control System
Application:
Modulating RoomTemperature Control
COMPONENT I.D.1. Unit DDC Controller2. Signal Conditioner
NET +
NET -
SHIELD
SENSE+12VRNCT+RNCT-GND
GNDRNET+RNET-+12V
TE
NR
0
98
765
4
3 2 1
LOCAL ACCESS
GND
INPUTS 1&205V,THERM OR DRY
INPUTS 3 & 4THERM OR DRY
GND
IN-5
IN-6
LED
INPUTS 5 & 6THERM DRY or LStat
CLASS 224 Vac. 50/60 CYCLE2Ova, 0.83AUSE COPPERCONDUCTORS ONLY.
CAUTION:To Reduce The Risk of Fire or or Electrical Shock, Do NotInterconnect Outputs of Different Class 2 Circuits
I/O ZONE 583
BT485Rx
Tx
+-
Batt
CR2032
Communications Selection
sne
Tse
nO
mm
oC
Gnd
Hot
Format
LStat Rnet
Short Pins
L StatIN-5 24 V ac
Power
Run
Error
IN-7
+3V
Gnd
IN-8
Pot.Only
Thermistor/Dry Contact0-5 vdc
On4321
EIA-485
BACnetover ARC 156
Comm SelectorDIP Switch
BAUD Rates SW1 SW2 PROTOCOLS SW1 SW2950019.2 K38.4K76.8 K
OFFOffOnOn
OffOnOffOn
BACnetMS/TPN2Modbus
Off
OnOff
Off
OffOn
Gnd
A0-3
Gnd
A0-2
A0-1
Gnd
DO-2
DO-1BUSPower for D.O.s
0-10vdc5ma Max.
BACnet
FormatJumper
LStat / Rnet PortSelector Jumper
Gain 1Jumper
CommunicationSelection Jumper
DO-3
DO-4
DO-5
GND
IN-4
IN-2
IN-3
IN-1
GND +
-
+
-
+
-
}
AO:
GND
0
98765
3 2 1
4
54
12
6
3
7
Space TemperatureSET Here
Space TemperatureSENSED Here
Includes:
Discharge air sensor 5 mounted in unit discharge with remote mounted 4 x 4box cover 7 including manual potentiometer to enable unit and adjust temperaturesetpoint, Fan On Light, Burner On Light and Cool On Light. Also includes RS-stdroom sensor 6 (does not allow remote room setpoint adjustment. Additionalpotentiometer is provided if optional return air damper section for manual or mixedair control is ordered.
C000634
3. Modulating Gas Valve4. Inlet Air Sensor
5. Discharge Air Sensor6. Room Thermostat7. Remote Control Station
18
Control Systems
MRT Pro Control System
Application:
Modulating RoomTemperature Control withRS-Pro room sensor allowingafter hours unit enable, roomsetpoint ajustment, and digitaltemperature readout.
COMPONENT I.D.1. Unit DDC Controller2. Signal Conditioner
MANUAL ON
INFO
WARMER
COOLER
68 F
NET +
NET -
SHIELD
SENSE+12VRNCT+RNCT-GND
GNDRNET+RNET-+12V
TE
NR
0
98765
4
3 2 1
LOCAL ACCESS
GND
INPUTS 1&205V,THERM OR DRY
INPUTS 3 & 4THERM OR DRY
GND
IN-5
IN-6
LED
INPUTS 5 & 6THERM DRY or LStat
CLASS 224 Vac. 50/60 CYCLE2Ova, 0.83AUSE COPPERCONDUCTORS ONLY.
CAUTION:To Reduce The Risk of Fire or or Electrical Shock, Do NotInterconnect Outputs of Different Class 2 Circuits
I/O ZONE 583
BT485Rx
Tx
+-
Batt
CR2032
Communications Selection
sne
Tse
nO
mmo
C
Gnd
Hot
Format
LStat Rnet
Short Pins
L StatIN-5 24 V ac
Power
Run
Error
IN-7
+3V
Gnd
IN-8
Pot.Only
Thermistor/Dry Contact0-5 vdc
On4321
EIA-485
BACnetover ARC 156
Comm SelectorDIP Switch
BAUD Rates SW1 SW2 PROTOCOLS SW1 SW2950019.2 K38.4K76.8 K
OFFOffOnOn
OffOnOffOn
BACnetMS/TPN2Modbus
Off
OnOff
Off
OffOn
Gnd
A0-3
Gnd
A0-2
A0-1
Gnd
DO-2
DO-1BUSPower for D.O.s
0-10vdc5ma Max.
BACnet
FormatJumper
LStat / Rnet PortSelector Jumper
Gain 1Jumper
CommunicationSelection Jumper
DO-3
DO-4
DO-5
GND
IN-4
IN-2
IN-3
IN-1
GND +
-
+
-
+
-
}
AO:
GND
0
98765
3 2 1
4
54
12
6
3
Space TemperatureSET And SENSED Here
C000633
Includes:
Discharge air sensor 5 mounted in unit discharge with remote mounted RS-Proroom sensor 6 with push buttons for room setpoint adjustment and digitaltemperature readout. On units with optional return air damper section a remotemounted 4 x 4 box cover is provided with potentiometer for manual or mixed aircontrol.
3. Modulating Gas Valve4. Inlet Air Sensor
5. Discharge Air Sensor6. Room Thermostat
19
Control Systems
MRT Expert Control System
Application:
Modulating RoomTemperature Control withBACview controller allowingafter hours unit enable, roomsetpoint adjustment, operatingfeedback, monitoring of alarmstatus and digital temperaturereadout with RS-std roomsensor.
NET +
NET -
SHIELD
SENSE+12VRNCT+RNCT-GND
GNDRNET+RNET-+12V
TE
NR
0
98765
4
32 1
LOCAL ACCESS
GND
INPUTS 1&205V,THERM OR DRY
INPUTS 3 & 4THERM OR DRY
GND
IN-5
IN-6
LED
INPUTS 5 & 6THERM DRY or LStat
CLASS 224 Vac. 50/60 CYCLE2Ova, 0.83AUSE COPPERCONDUCTORS ONLY.
CAUTION:To Reduce The Risk of Fire or or Electrical Shock, Do NotInterconnect Outputs of Different Class 2 Circuits
I/O ZONE 583
BT485Rx
Tx
+-
Batt
CR2032
Communications Selection
sneT
senO
mm
oC
Gnd
Hot
Format
LStat Rnet
Short Pins
L StatIN-5 24 V ac
Power
Run
Error
IN-7
+3V
Gnd
IN-8
Pot.Only
Thermistor/Dry Contact0-5 vdc
On4321
EIA-485
BACnetover ARC 156
Comm SelectorDIP Switch
BAUD Rates SW1 SW2 PROTOCOLS SW1 SW2950019.2 K38.4K76.8 K
OFFOffOnOn
OffOnOffOn
BACnetMS/TPN2Modbus
Off
OnOff
Off
OffOn
Gnd
A0-3
Gnd
A0-2
A0-1
Gnd
DO-2
DO-1BUSPower for D.O.s
0-10vdc5ma Max.
BACnet
FormatJumper
LStat / Rnet PortSelector Jumper
Gain 1Jumper
CommunicationSelection Jumper
DO-3
DO-4
DO-5
GND
IN-4
IN-2
IN-3
IN-1
GND +
-
+
-
+
-
}
AO:
GND
0
9876
53 2 1
4
54
12
6
3
7
Space TemperatureSET Here
Space TemperatureSENSED Here
COMPONENT I.D.1. Unit DDC Controller2. Signal Conditioner
C000632
Includes:
Discharge air sensor 5 mounted in unit discharge with remote mounted BACviewcontroller 7 to set space temperature, operating schedules, and optional dampercontrol setpoints. Service information, operating feedback and alarm status can alsobe monitored. Also includes a RS-std room sensor 6 .
3. Modulating Gas Valve4. Inlet Air Sensor
5. Discharge Air Sensor6. Room Thermostat
21
Typical Wiring Diagram - Page 2
Wiring Diagram
C000630
NET +
NET -
SHIELD
SENSE+12VRNCT+RNCT-GND
GNDRNET+RNET-+12V
TE
NR
0
98
765
4
3 2 1
LOCAL ACCESS
GND
INPUTS 1&205V,THERM OR DRY
INPUTS 3 & 4THERM OR DRY
GND
IN-5
IN-6
LED
INPUTS 5 & 6THERM DRY or LStat
CLASS 224 Vac. 50/60 CYCLE2Ova, 0.83AUSE COPPERCONDUCTORS ONLY.
CAUTION:To Reduce The Risk of Fire or or Electrical Shock, Do NotInterconnect Outputs of Different Class 2 Circuits
I/O ZONE 583
BT485Rx
Tx
+-
Batt
CR2032
Communications Selection
sneT
senO
mmo
C
Gnd
Hot
Format
LStat Rnet
Short PinsL StatIN-5 24 V ac
Power
Run
Error
IN-7
+3V
Gnd
IN-8
Pot.Only
Thermistor/Dry Contact0-5 vdc
On4321
EIA-485
BACnetover ARC 156
Comm SelectorDIP Switch
BAUD Rates SW1 SW2 PROTOCOLS SW1 SW2950019.2 K38.4K76.8 K
OFFOffOnOn
OffOnOffOn
BACnetMS/TPN2Modbus
Off
OnOff
Off
OffOn
Gnd
A0-3
Gnd
A0-2
A0-1
Gnd
DO-2
DO-1BUSPower for D.O.s
0-10vdc5ma Max.
BACnet
FormatJumper
LStat / Rnet PortSelector Jumper
Gain 1Jumper
CommunicationSelection Jumper
DO-3
DO-4
DO-5
GND
IN-4
IN-2
IN-3
IN-1
GND +
-
+
-
+
-
}
AO:
GND
0
98
7653 2 1
4
+
-
O
C
E
+
-
O
C
E+
-
O
C
E
22
AMPS for 208V 3 Ph.AMPS for 230V 3 Ph.AMPS for 460V 3 Ph.AMPS for 575V 3 Ph.
AMPS for 208V 3 Ph.AMPS for 230V 3 Ph.AMPS for 460V 3 Ph.AMPS for 575V 3 Ph.
DIRECT FIRED UNITSWITH RETURN AIR
Electrical Data and Sequence of Operation
Sequence of Operation – Return Air Units
Signal from remote control I to AirTrakController D, sets operational parametersfor dampers B and C, and burner. Damperoperation can be manual, building pres-sure or mixed air temperature.
Return air dampers B, and outside airdampers C, are interlocked to movetogether. As one opens, the other closes.As the return air dampers open, allowingmore return air to enter the unit, the out-side air dampers move toward the closedposition, decreasing the amount of outsideair. Pressure sensor and flow station J,senses change in return airflow and signalsAirTrak Controller D.
Modulating gas valve H, regulates gassupply in response to signal from AirTrakController D. AirTrak Controller D, variessignal based on input from room tempera-ture sensor F, discharge temperaturesensor G, and airflow sensor J. Gas valve Hcan provide approximately 4% to 100% ofrated burner capacity.
P000621
14.64.22.11.7
ITEM
A
310.6 9.6 4.8 3.9
516.715.2 7.6 6.1
MOTOR HORSEPOWER
Amp Draw Table
BlowerMotor
1030.828.014.011.0
71/2
24.222.011.0 9.0
11/2
6.66.03.02.4
27.56.83.42.7
SOURCE
1546.242.021.017.0
ITEM
A
3088.080.040.032.0
40114.0104.0 52.0 41.0
MOTOR HORSEPOWER
BlowerMotor
60169.0154.0 77.0 62.0
50143.0130.0 65.0 52.0
2059.454.027.022.0
2574.868.034.027.0
SOURCE
AMPS for 208V 3 Ph.AMPS for 230V 3 Ph.AMPS for 460V 3 Ph.AMPS for 575V 3 Ph.
Heating Only Unit2.42.21.10.9
ITEM
B
CONTROL CIRCUIT AMPS
ControlTransformer
SOURCE
AMPS
AMPS
AMPS
Steps to size optional disconnect switch:1. Find the blower motor HP required from tables on pages 4 and 5.
2. Find amp draw for required motor HP from chart in Item A above.
3. Find amps for control circuit from chart in Item B above.
4. Add amps from step 2 and step 3, multiply by 1.25.
NOTES:1. Above motor amps are based on 2002 edition of NEC.
2. Control circuit amps are based on standard controls.
23
Typical Gas Piping Layout
Schematic Component Diagrams
NOTES:1. Vent limiting devices provided wherever possible, when venting is required* the venting to outside is by
others on indoor units.
2. Units with 900 MBH and less use a pressure regulator (not shown) for high fire setting.
3. For inlet pressures under 10” W.C. - Please consult factory.
4. 3,300 MBH and above will require a minimum inlet pressure of 1 PSIG. For inlet pressures under1 PSIG - Please consult factory.
5. Units that are listed to the Z83.4 standard (100% make-up air) carry both ETL and CETL approvals.
6. Standard manifold meets FM requirements for inputs under 2,500 MBH for ETLlisted units.
7. Standard manifold meets IRI requirements for ETL listed units.
8. High gas pressure regulator required if inlet pressure exceeds 1/2 PSIG for inputs up to andincluding 900 MBH or inlet pressures over 5 PSIG for inputs greater than 900 MBH.
C000148
COMPONENT IDENTIFICATIONGP-01 HIGH GAS PRESSURE REGULATORGP-02 MAIN GAS SHUT-OFF VALVEGP-09 PILOT GAS PRESSURE REGULATORGP-11 MAIN TEST FIRING SHUT-OFF VALVEGP-13 PILOT GAS SHUT-OFF VALVEGP-27 ORIFICED NEEDLE VALVEVG-01 PILOT GAS VALVEVG-02 MAIN GAS VALVEVG-03 AUXILIARY GAS VALVEVG-04 NORMALLY OPEN VENT VALVEVG-07 MODULATING VALVEPS-04 LOW GAS PRESSURE SWITCHPS-07 HIGH GAS PRESSURE SWITCHPS-10 HIGH VELOCITY PRESSURE SWITCHPS-11 LOW VELOCITY PRESSURE SWITCH
24
Horizontal Discharge
Cabinet Arrangements and Weights
HLT HLBHLS
HRSHRT HRB
Vertical Discharge
Unit Weights (Approximate)
VRTVSTVLT
For all arrangements shown, controls are on near side.
APPROXIMATE WEIGHT (LBS.)
C000616
Blower SectionModel
InletHood
InletDamper
V-BankFilter Burner
ReturnAir
DischargeLouver
AirflowStation
70
80
110
125
150
215
230
C
67
94
159
224
158
268
388
A
67
94
159
224
158
268
388
165
185
275
310
275
410
500
260
375
550
700
510
725
1010
104
116
151
208
141
226
302
55
70
120
155
125
233
340
140
150
183
216
224
290
350
D
67
94
159
224
158
268
388
B
149
253
439
590
438
697
953
109-112
115-118
120-122
125-130
215-218
220-222
225-230
43
73
88
101
123
161
191
VerticalStand
134
149
259
356
242
387
517
○
○
○
○
○
○
○
○
○
○
○
○
○
25
HVAC PRODUCTS
Guide Specification – Base Unit
Base Bid Sterling model SDFI_____ make-up airunit(s) designed for indoor application. Theunit discharge shall be designed for easyadaptation to external duct work or optionalaccessories. The unit(s) shall be capable ofdelivering ___ cfm at ___ ESP using a ___horsepower (ODP) (TEFC) motor operatingon (208/3/60) (230/3/60) (460/3/60).
Burner SectionThe line burner shall be capable of delivering___BTUH firing on (natural gas) (propane)at an inlet pressure of ___ (inches watercolumn) (PSIG). The standard ETL listed unitwill meet ANSI, FM, and IRI requirements.Both burner and blower shall be compensatedfor an altitude of ___ feet above sea level.Manifold to be located outside of air stream.An observation port shall be located toprovide view of pilot and main flame.
Unit(s) shall be supplied with a wide rangeburner with a modulating turndown ratio of25:1. Adjustable profile plates shall be providedand sized to maintain the require velocity acrossthe line burner. The operation of the burner shallbe programmed through the flame safeguardwith timed prepurge and flame-sensed bymeans of a (flame rod)(ultra violet scanner).
The burner assembly and gas manifold shallbe completely prepiped and factory testedprior to shipment.
The unit shall be controlled by the AirTrakDDC control module with full BACnetcompatibility. Unit shall have the AirTrak(MDT - Modulating Discharge TemperatureControl System)(MRT – Modulating RoomTemperature Control System)(MRT-ProModulating Room Pro Temperature ControlSystem)( MRT-Expert Modulating RoomExpert Temperature Control System). TheAirTrak DDC control system shall include butnot be limited to the following controlsrequired for standard operation:• Electronic time clock with normal, holiday,
and override schedules. (Optional accessoryon MDT or MRT Control Systems).
• Timed freeze protection to prevent heater fromdischarging unheated air into the building.
• Inlet On-Off ductstat which will turn burneroff when inlet temperature equals desireddischarge air temperature as fuel savingsmode.
• On-Off night setback thermostat for loweroperating temperatures in unoccupiedmode as fuel savings mode. (Optionalaccessory on MDT or MRT Control Systems).
UNIT CASINGUnit casing and accessories shall be fabricatedfrom heavy-gauge bright spangled galvanizedsteel suitably reinforced to insure rigidity. Allcasings shall be air tight. Complete accessshall be provided to all components. Thisincludes the blower, burner, and electricalcomponents.
BLOWER SECTIONEach unit shall be supplied with centrifugalforward curve, DWDI fan(s) rated in accor-dance with AMCA standards. The fan or fansshall be mounted on a solid shaft for singleblowers and a hollow shaft for doubleblowers. Shaft designed for a maximumoperating speed not to exceed 75% of its firstcritical speed. Bearings are to be externalheavy-duty industrial prelubricated type.Blowers to be driven by a V-belt package sizedwith a capacity of 25% greater than themotor horsepower. Multiple belt applicationswill be matched sets. Drives are to be (fixed)(adjustable). Maximum outlet velocity _____FPM. Motor to be externally mounted onadjustable slide base. Belt guard shall beprovided for protection.
CONTROL ENCLOSUREThe units(s) shall be supplied with a controlcompartment and all controls mounted withinthis compartment are to be wiredto a numbered terminal strip. All wiringis to be color coded and in accordancewith the NEC. A circuit diagram of theapproved electrical drawing is to be laminatedto the inside of the control cabinet door. Allelectrical componentsshall bear a recognized label.
STANDARD CONTROLS 1. Main fan starters and overloads 2. Control circuit fuses 3. High temperature limit switch 4. Flame safeguard with alarm contacts 5. Flame rod sensor 6. Ignition transformer 7. Automatic pilot valve 8. Main gas automatic safety shutoff valve 9. MDT Control System10. Air proving differential switch11. Control transformer12. Remote control panel
OPTIONAL ACCESSORIES 1. Motorized inlet damper 2. V-bank filter box with filters 3. Insulation 4. Vibration hangers or mounting feet 5. Clogged filter switch 6. Disconnect switch 7. High gas pressure regulator (required
for inlet pressures over 1/2 PSIG) 8. UV flame detection
(mini or purple peeper) 9. Painted galvanized casing10. U. L. labeled control panel11. Vertical arrangement with
support stand and inlet birdscreen12. Mixed air section with or
without return air flow station13. Firestat14. 115 Volt service receptacle15. BACviewController
○
○
○
○
○
○
○
○
○
○
○
○
○
26
HVAC PRODUCTS
Unit(s) shall have outside air and return airdampers with modulating actuator controlledby AirTrak DDC control system. The AirTrakDDC control system shall have capability todigitally control the outside air quantity froma nominal minimum of 20% to 100% withintegrated gas valve control at all roomconcentrations of CO2.
The return air inlet shall include a self-calibrating flow measuring station with agrid of velocity pressure probes with spacingno greater than 12” over the entire face ofthe return air opening and sampled everytwo seconds. Samples will be added to atwenty-five point rolling average and thenon to a second rolling average to providesmooth, accurate data that is delivered tothe AirTrak DDC control system everytwo seconds. The DDC control system shallbe capable of electronically displaying thereturn air/outside air ratio within 5%accuracy at all damper positions.
The AirTrak DDC control system shall becapable of controlling mixing dampers in:(Choose One)
Manual Mode: The “Manual” mode allowsmanual positioning of the outside air (O.A.)damper and return air (R.A.) damper bychanging the damper position setpoint.
Mixed Air Temperature Mode: The “MixedAir Temperature” mode shall provideautomatic control of the mixed air tempera-ture by modulating the outside air (O.A.)damper and return air (R.A.) damper tomaintain the mixed air temperature setpoint.As the mixed air temperature increasesabove the setpoint more outside air will beintroduced.
Building Pressure Mode: The “BuildingPressure” mode shall provide automaticbuilding pressure control by modulating theoutside air (O.A.) damper and return air(R.A.) damper to maintain the indoorbuilding pressure setpoint. As the buildingpressure decreases below the setpoint moreoutside air will be introduced.
Guide Specification – Mixing Dampers WithReturn Air Flow Station
○
○
○
○
○
○
○
○
○
○
○
○
○
27
HVAC PRODUCTS
Guide Specification – BACview Controller
The display functions of the remote key-board display for the AirTrak DDC controlsystem shall have a minimum of two lines,sixteen character display which shall includebut not limited to the following:
• Return air temperature
• Outside air temperature
• Discharge air temperature
• Mixed air temperature
• Maximum allowable temperature rise
• Actual temperature rise
• Current percent of outside air
• Current building pressure (optional)
• Current damper input voltage (optional)
• Current burner input voltage
• Fan operating hours since last reset
• Fan start cycle count since last reset
• Burner operating hours since last reset
• Burner start cycle count since last reset
• Cooling interlock operating hours sincelast reset
• Cooling interlock cycle count since lastreset
• Critical alarm conditions:o Airflow switch failureo Unit on, fan offo Unit off, fan ono Low discharge temperatureo Safety circuit openo Burner jumped
The control settings available on the remotekeyboard display for the AirTrak DDC controlsystem shall include but not be limited to thefollowing:
• Heating setpoint
• Cooling setpoint
• Economizer options
• Setback setpoint
• Freeze protection setpoint
• Maximum discharge air temperaturesetpoint
• Minimum discharge air temperaturesetpoint
• Minimum ventilation option and setpoint
• Time of day schedule selection andsetpoints (Not available on MDT or MRTControl Systems)o Normal 5/7 scheduleo Holiday scheduleo Manual override
○
○
○
○
○
○
○
○
EfficientDirect FiredGas HeatingSystem
Choose Sterling Direct Fired Gas Heating• Heat large or small spaces efficiently with 100% combustion efficiency
• Constantly replace contaminated indoor air with fresh, heated outside air
• Low operating and maintenance costs
• Fresh air ventilation anytime — just turn off the gas heating system
• Simple, inexpensive installation
• Sterling, a leader in research, engineering, and customer service since 1946
• Fans tested to AMCA standards to insure rated airflow
Sterling
www.sterlinghvac.com
4830 Transport Drive Dallas TX 75247
Telephone 214.638.6010
Fax 214.905.0806
Printed in U.S.A.© Copyright U.S.A. 2005
HVAC PRODUCTS
top related