Sterling QVSF User Manual

INSTALLATION INSTRUCTIONS & PARTS LIST

SEPARATED COMBUSTION

GAS FIRED PROPELLER UNIT HEATERS

ATTENTION: READ THIS MANUAL AND ALL LABELS ATTACHED TO THE UNIT CAREFULLY BEFORE ATTEMPTING TO INSTALL, OPERATE OR SERVICE THESE UNITS! CHECK UNIT DATA PLATE FOR TYPE OF GAS AND ELECTRICAL SPECIFICATIONS AND MAKE CERTAIN THAT THESE AGREE WITH THOSE AT POINT OF INSTALLATION. RECORD THE UNIT MODEL AND SERIAL No.(s) IN THE SPACE PROVIDED. RETAIN FOR FUTURE REFERENCE.

PSCII-8

J30-05388

Model No.

Serial No.

FOR Y OUR SAFETY

The use and storage of gasoline or other ﬂ ammable v apors and liquids in open containers in the vicinity of this appliance is hazardous.

FOR Y OUR SAFETY

If you smell gas:

1. Open windows.

2. Don’t touch electrical switches.

3. Extinguish any open ﬂ ame.

4. Immediately call your gas supplier.

ENERGY

PERFORMANCE

VERIFIED

RENDEMENT

ENERGETIQUE

VERIFIE

Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. Read the installation, operating and maintenance instructions thoroughly before installing or servicing this equipment.

APPROVED FOR USE IN CALIFORNIA

Install, operate and maintain unit in accordance with manufacturer's instructions to avoid exposure to fuel substances or substances from incomplete combustion which can cause death or serious illness. The state of California has determined that these substances may cause cancer, birth defects, or other reproductive harm.

11/12

Installer Please Note: This equipment has been test fired and inspected. It has been shipped free from defects from our factory. However, during shipment and installation, problems such as loose wires, leaks or loose fasteners may occur. It is the installer's

responsibility to inspect and correct any problems that may be found.

RECEIVING INSTRUCTIONS

Inspect shipment immediately when received to determine if any damage has occurred to the unit during shipment. After the unit has been uncrated, check for any visible damage to the unit. If any damage is found, the consignee should sign the bill of lading indicating such damage and immediately file claim for damage with the transportation company.

260 NORTH ELM ST., WESTFIELD, MA 01085

TEL: (413) 568-9571 FAX: (413) 562-8437

www.mestek.com

TABLE OF CONTENTS

SPECIFICATIONS

Basic Description ....................................................2

Performance & Speciﬁ cation Data ..........................4

GENERAL SAFETY INFORMATION

Installation Codes (throughout manual) ..............2, 3

Special Precautions ............................................2, 3

INSTALLATION

Locating Units .....................................................5, 6

Proper Clearances ..............................................5, 6

Suspension of Units ............................................5, 6

Gas Supply Piping ..............................................7, 8

Pipe Installation ......................................................8

ELECTRICAL CONNECTIONS ...........9, 10, 11, 12, 13

NOTICE: It is the equipment owner’s responsibility to provide any scaffolding or other apparatus required to perform emergency service or annual/periodic maintenance to this equipment.

INSTALLATION - VENTING

Combustion Air Venting & Piping ..........................14

Exhaust Venting ..................................14, 15, 16, 17

OPERATION .................................................18, 19, 20

Adjustments ....................................................18, 20

MAINTENANCE

Servicing & Cleaning ............................................21

IDENTIFICATION OF PARTS ....................4, 19, 22, 27

TROUBLESHOOTING GUIDE ................23, 24, 25, 26

Replacement Parts ...............................................27

WARRANTY ..............................................................28

UNIT NUMBER DESCRIPTION ................................29

INSPECTION SHEET ................................................32

DESCRIPTION

The Pow er V ented gas unit heater is a f actory assembled, power vented, low static pressure type propeller f an heater designed to be suspended within the space to be heated. THESE HEATERS ARE NOT TO BE CONNECTED TO DUCTWORK. The designs are certified by ETL as

providing a minimum of 80% thermal efficiency, and approved for use in California. Do not alter these units in any way. If you have any questions after reading this manual, contact the manufacturer.

Figure 1 - Power Vented Separated Combustion Propeller Unit Heaters

Front View

The following terms are used throughout this manual, in addition to ETL requirements, to bring attention to the presence of potential hazards or to important information concerning the product:

See Identiﬁ cation of Parts Section

for unit components.

Rear View

Indicates an imminently hazardous situation which, if not av oided, will result in death, serious injury or substantial property damage.

Indicates an imminently hazardous situation which, if not avoided, could result in death, serious injury or substantial property damage.

Indicates an imminently hazardous situation which, if not avoided, may result in minor injury or property damage.

NOTICE: Used to notify of special instructions on installation, operation or maintenance which are important to equipment but not related to personal injury hazards.

GENERAL SAFETY INFORMATION

Failure to comply with the General Safety Information may result in extensive pr operty damage, severe personal injury or death.

This product must be installed b y a licensed plumber or gas ﬁ tter when installed within the Commonwealth of Massachusetts.

Installation must be made in accordance with local codes, or in absence of local codes with the latest edition of ANSI Standard Z223.1 (N.F.P.A. No.54) National Fuel Gas Code. All of the ANSI and NFPA

Standards referred to in these installation instructions are those that were applicable at the time the design of this appliance was certified. The ANSI Standards are available from the American National Standards Institute, Inc.,11 West 42nd Street, New Yor k, NY, 10036 or www. ansi.org. The NFPA Standards are available from the National Fire Protection Association, Batterymarch Park, Quincy, MA 02269. These unit heaters are designed for use in airplane hangars when installed in accordance with ANSI/NFP A No . 409 and in public garages when installed in accordance with NFPA No. 88A and NFPA No. 88B.

If installed in Canada, the installation must conform with local building codes, or in absence of local building codes, with CSA-B149.1 “Installation Codes for Natural Gas Burning Appliances and Equipment” or CSA-B149.2 “Installation Codes for Propane Gas Burning Appliances and Equipment”. These Unit Heaters have been designed and certiﬁ ed to comply with CSA 2.6. Also see sections on installation in AIRCRAFT HANGARS and PUBLIC GARAGES.

Do not alter the unit heater in any way or damage to the unit and/or severe personal injury or death may occur!

Disconnect all power and gas supplies before installing or servicing the heater . If the power disconnect is out of sight, lock it in the open position and tag it to prevent unexpected application of power . Failure to do so could result in fatal electric shock, or severe personal injury.

Ensure that all power sources conform to the requirements of the unit heater or damage to the unit will result!

Follow installation instructions CAREFULLY to avoid creating unsafe conditions. All wiring should be done and checked by a qualiﬁ ed electrician, using copper wire only. All external wiring must conform to applicable local codes and to the latest edition of the National Electrical Code ANSI/NFPA No. 70. All gas connections should be made and leak-tested by a suitably qualiﬁ ed individual, per instructions in this manual. Also follow procedures listed on the “Gas Equipment Start-Up Sheet” located in this manual.

Use only the fuel for which the heater is designed (see rating plate). Using LP gas in a heater that requires natural gas, or vice versa, will create the risk of gas leaks, carbon monoxide poisoning and explosion.

Do not attempt to convert the heater for use with a fuel other than the one intended. Such conversion is dangerous, as it will create the risks listed previously.

Make certain that the power source conforms to the electrical requirements of the heater.

Do not depend upon a thermostat or other switch as sole means of disconnecting power when installing or servicing heater. Always disconnect power at main cir cuit breaker as described above. Failure to do so could result in fatal electric shock.

Special attention must be given to any grounding information pertaining to this heater. To prevent the risk of electrocution, the heater must be securely and adequately grounded. This should be accomplished by connecting a grounded conductor between the service panel and the heater. To ensure a proper ground, the grounding means must be tested by a qualified electrician.

Do not insert ﬁ ngers or foreign objects into the heater or its air moving device. Do not block or tamper with the heater in any manner while in operation or just after it has been turned off, as some parts may be hot enough to cause injury.

This heater is intended for general heating applications ONLY. It must NOT be used in potentially dangerous locations such as ﬂ ammable, explosive, chemical-laden or wet atmospheres.

Do not attach ductwork to this product or use it as a makeup air heater. Such usage voids the warranty and will create unsafe operation.

In cases in which property damage may result from malfunction of the heater, a backup system or a temperature sensitive alarm should be used.

The open end of piping systems being purged shall not discharge into areas where there are sources of ignition or into conﬁ ned spaces UNLESS precautions are taken as follows: (1) By ventilation of the space, (2) control of purging rate, (3) elimination of all hazardous conditions. All precautions must be taken to perform this operation in a safe manner!

Unless otherwise speciﬁ ed, the following conversions may be used for calculating SI unit measurements: 1 foot = 0.305 m 1 inch = 25.4 mm 1 psig = 6.894 kPa 1 pound = 0.453 kg 1 gallon = 3.785 L

1 inch water column = 0.249 kPa 1 meter/second = FPM ÷ 196.8 1 liter/second = CFM x 0.472 1000 Btu per hour = 0.293 kW 1000 Btu/Cu. Ft. = 37.5 MJ/m 1 cubic foot = 0.028 m

T able 1 – Perf ormance and Speciﬁ cation Data – Separated Combustion Propeller Unit heater

Capacity (MBH) 100 125 150 175 200 225 250 300 350 400 PERFORMANCE DATA ‡

Input BTU/Hr 100,000 125,000 150,000 175,000 200,000 225,000 250,000 300,000 350,000 400,000 (kW) (29.3) (36.6) (43.9) (51.2) (58.6) (65.9) (73.2) (87.8) (102.5) (117.1) Output BTU/Hr 80,000 100,000 120,000 140,000 160,000 180,000 200,000 240,000 280,000 320,000 (kW) (23.4) (29.3) (35.1) (41.0) (46.9) (52.7) (58.6) (70.3) (82.0) (93.7) Thermal Efﬁ ciency (%) 80 80 80 80 80 80 80 80 80 80 Free Air Delivery CFM 1,480 1,650 2200 2,530 2,640 2,700 3,100 4,400 5,000 5,300 (cu. m/s) (0.699) (0.779) (1.038) (1.194) (1.246) (1.274) (1.463) (2.077) (2.360) (2.502) Air Temperature Rise °F 50 56 50 51 56 61 60 50 52 56 (°C) (10) (13) (10) (11) (13) (16) (16) (10) (11) (13) Outlet Velocity FPM 775 910 1045 1070 1000 950 980 1100 1150 1050 (m/s) (3.9) (4.6) (5.3) (5.4) (5.1) (4.8) (5.0) (5.6) (5.8) (5.3) Full Load Amps at 115V (ODP) 4.5 6.1 6.6 7.7 7.7 7.7 7.7 11.3 13.5 13.5 MOTOR DATA: Motor HP 1/20 1/10 1/4 1/3 1/3 1/3 1/2 (2)1/4 (2)1/3 (2)1/3 Motor (kW) (0.037) (0.075) (0.186) (0.249) (0.249) (0.249) (0.373) (0.186) (0.249) (0.249) Motor Type (ODP) SP SP PSC PSC PSC PSC PSC PSC PSC PSC RPM 1,050 1,050 1,140 1,140 1,140 1,140 1,140 1,140 1,140 1,140 Amps @ 115V (ODP) 2.6 4.2 4.7 5.8 5.8 5.8 5.8 9.4 11.6 11.6 DIMENSIONAL DATA Inches (mm) “A” Height to Top of Unit 31-1/4 31-1/4 36-1/4 36-1/4 36-1/4 36-1/4 36-1/4 36-1/4 36-1/4 36-1/4 (794) (794) (921) (921) (921) (921) (921) (921) (921) (921) “B” Height to Top of Hanger 34-1/16 34-1/16 39-1/16 39-1/16 39-1/16 39-1/16 39-1/16 39-1/16 39-1/16 39-1/16 (865) (865) (992) (992) (992) (992) (992) (992) (992) (992) “C” Hanging Distance Width 14-3/4 17-1/2 17-1/2 20-1/4 23 25-3/4 28-1/2 34 39-1/2 45 (375) (445) (445) (514) (584) (654) (724) (864) (1003) (1143) “D” Discharge Opening Width 15-3/8 18-1/8 18-1/8 20-7/8 23-5/8 26-3/8 29-1/8 34-5/8 40-1/8 45-5/8 (391) (460) (460) (530) (600) (670) (740) (879) (1019) (1159) “E” Width of Unit 17-7/8 20-5/8 20-5/8 23-3/8 26-1/8 28-7/8 31-5/8 37-1/8 42-5/8 48-1/8 (454) (524) (524) (594) (664) (733) (803) (943) (1083) (1222) “F” to Centerline of Flue 5-7/8 7-1/4 7-1/4 8-5/8 10 11-1/4 12-3/4 15-1/2 18-1/4 21 (149) (184) (184) (219) (254) (286) (324) (394) (464) (533) Flue Size Diameter Inches** 4 4 4 4 5 5 5 6 6 6 (Diameter mm) (102) (102) (102) (102) (127) (127) (127) (152) (152) (152) Air Inlet Size-Inches 4 4 4 4 5 5 5 6 6 6 (mm) (102) (102) (102) (102) (127) (127) (127) (152) (152) (152) Fan Diameter-Inches 14 16 16 18 18 18 18 16 18 18 Gas Inlet-Natural Gas-Inches 1/2 1/2 1/2 1/2 1/2 3/4 3/4 3/4 3/4 3/4 Gas Inlet-LP Gas-Inches 1/2 1/2 1/2 1/2 1/2 ← 1/2 or 3/4 → Approx. Shipping Wt. lb. 200 228 256 284 312 340 368 432 488 545 (kg) (91) (103) (116) (129) (142) (154) (167) (196) (221) (247)

‡ Ratings shown are for unit installations at elevations between 0 and 2,000 ft. (0 to 610m). For unit installations in U.S.A. above 2,000 ft. (610m), the unit input must be derated 4% for each 1,000 ft.

(305m) above sea level; refer to local codes, or in absence of local codes, refer to the latest edition of the National Fuel Gas Code, ANSI Standard Z223.1 (N.F.P.A. No. 54).

For installations in Canada, any reference to deration at altitudes in excess of 2,000 ft. (610m) are to be ignored. At altitudes of 2,000 ft. to 4,500 ft. (610 to 1372m), the unit must be derated to 90%

of the normal altitude rating, and be so marked in accordance with the ETL certiﬁ cation.

LEGEND: SP = SHADED POLE PSC = PERMANENT SPLIT CAPACITOR ODP = OPEN DRIP PROOF

Figure 1A

DIMENSIONS .XXX STANDARD UNITS DIMENSIONS IN PARENTHESIS (XXX) MILLIMETERS

INSTALLATION

“H”

Unit

Heater

Floor Line

Do not install unit heaters in corrosive or ﬂ ammable atmospheres! Premature failure of, or severe damage to the unit will result!

Av oid locations where extreme drafts can affect burner operation. Unit heaters must not be installed in locations where air for combustion would contain chlorinated, halogenated or acidic vapors. If located in such an envir onment, premature failure of the unit will occur!

Since the unit is equipped with an automatic gas ignition system, the unit heater must be installed such that the gas ignition control system is not directly exposed to water spray, rain or dripping water.

NOTICE: Location of unit heaters is related directly to the selection of sizes (refer to Figure 2). Basic rules are as follows:

Figure 2 - Heater Location

D2787

MOUNTING HEIGHT: Unit Heaters must be installed at a minimum of 8 feet (2.4m) abov e the ﬂ oor , measured to the bottom of the unit. At heights abo ve 8 feet (2.4m), less efficient air distribution will result. Occasionally unit heaters must be mounted at heights of 12 to 16 feet (3.66 to 4.88m) in order to clear obstacles. When this is the case, it is advisable to use centrifugal blower unit heaters . If the unit heater to be mounted below 8 feet (2.4m) abov e the ﬂ oor, the unit heater m ust be equipped with an OSHA approved f an guard.

highest aircraft to be stored in the hangar and

of the 8 feet (2.4m) above the ﬂ oor in shops, ofﬁ ces and other sections of the hangar where aircraft are not stored or housed. Refer to current ANSI/NFPA No. 409, Aircraft Hangars. In Canada, installation is suitable in aircraft hangars when acceptable to the enforcing authorities.

PUBLIC GARAGES: In repair garages, unit heaters must be at least 8 feet (2.4m) abov e the ﬂ oor. Ref er to the latest edition of NFPA No. 88B, Repair Garages.

In parking structures, unit heaters must be installed so that the burner flames are located a minimum of 18 inches (457mm) above the floor or protected by a partition not less than 18 inches (457mm) high. Howe ver, any unit heater mounted in a parking structure less than 8 feet (2.4m) above the ﬂ oor must be equipped with an OSHA approved fan guard. Refer to the latest edition of NFPA 88A, Parking Structures.

In Canada, installation must be in accordance to the latest edition of CSA-B149 “Installation Codes for Gas Burning Appliances and Equipment.”

AIR DISTRIBUTION: Direct air towards areas of maximum heat loss. When multiple heaters are in volved, circulation of air around the perimeter is recommended where heated air ﬂ ows along exposed walls. Satisfactory results can also be obtained where multiple heaters are located toward the center of the area with heated air directed toward the outside walls. Be careful to avoid all obstacles and obstructions which could impede the warm air distribution patterns. Heat throw distances are presented in Table 2, and Figure 2A.

Figure 2A - Heat Throw Distances

AIRCRAFT HANGARS: Unit Heaters must be installed in

aircraft hangars and public garages as f ollo ws: In aircraft hangars, unit heaters must be at least 10 feet (3.0m) above the upper surface of wings or engine enclosures

Table 2 - Standard Applications Heat Throw Distances (see ﬁ gure 2A)

UNIT SIZE BTU/Hr (kW)

“H”

Feet 100,000 125,000 150,000 175,000 200,000 225,000 250,000 300,000 350,000 400,000 (m) (29.3) (36.6) (43.9) (51.2) (58.6) (65.9) (73.2) (87.8) (102.5) (117.1)

8 60 65 70 75 80 85 90 105 110 120 (2.4) (18.3) (19.8) (21.3) (22.9) (24.4) (25.9) (27.4) (32.0) (33.5) (36.6) 10 54 56 60 64 68 72 78 90 95 100 (3.0) (16.5) (17.1) (18.3) (19.5) (20.7) (21.9) (23.8) (27.4) (29.0) (30.5) 12 44 46 49 57 61 65 68 80 84 90 (3.7) (13.4) (14.0) (20.7) (17.4) (18.6) (19.8) (20.7) (24.4) (25.6) (27.4) 15 NR NR 45 49 52 56 60 70 74 80 (4.6) (22.6) (14.9) (15.8) (17.1) (18.3) (21.3) (22.6) (24.4) 20 NR NR NR NR 46 50 54 63 66 70 (6.1) (14.0) (15.2) (16.5) (19.2) (20.1) (21.3)

NR = Not recommended H = Distance from ﬂ oor to bottom of the unit.

INSTALLATION (continued)

Unit heaters should not be installed to maintain low temperatures and/or freeze protection of buildings. A minimum of 50°F (10°C) thermostat setting must be maintained. If unit heaters are operated to maintain lower

than 50°F (10°C), hot ﬂ ue gases are cooled inside the heat exchanger to a point where water v apor (a ﬂ ue gas by-product) condenses onto the heat exchanger walls . The result is a mildly corrosive acid that prematurely corrodes the aluminized heat exchanger and can actually drip water down from the unit heater onto ﬂ oor surface. Additional unit heaters should be installed if a minimum 50°F (10°C) thermostat setting cannot be maintained.

NOTICE: Unit heater sizing should be based on heat loss calculations where the unit heater output equals or exceeds heat loss. Heater output is approximately 80% of input BTU/HR rating.

CLEARANCES: Each Gas Unit Heater shall be located

with respect to building construction and other equipment so as to permit access to the Unit Heater. Clearance between walls and the vertical sides of the Unit Heater shall be no less than 18 inches (457mm). A minimum clearance of 6 inches (152mm) must be maintained between the top of the Unit Heater and the ceiling. The bottom of the Unit Heater must be no less than 12 inches (305 mm) from any combustible. However, in order to ensure access to the burner compartment, a minimum distance of 25 inches (635mm) is required. The distance between the ﬂ ue collector and any combustible must be no less than 6 inches (152mm). Also see COMB USTION AIR and EXHAUST VENTING sections.

Make certain that the structure to which the heater is mounted is capable of supporting its weight. Under no circumstances must the gas lines, the venting system or the electrical conduit be used to support the heater; nor should any other objects (i.e. ladder, per son) lean against the heater , gas lines, venting system or the electrical conduit for support.

Unit heaters must be hung level from side to side and from front to back, see Figures 1A through 3B. Failure to do so will result in poor performance and or premature failure of the unit.

Ensure that all hardware used in the suspension of each unit heater is more than adequate for the job. Failure to do so may result in extensive property damage, severe personal injury or death.

personal injury or death!

Refer to ﬁ gures 1 through 4, and dimensional data per table 1 for suspension of units.

Figure 3A - Heater Mounting*

NOTICE: Increasing the clearance distances may be necessary if there is a possibility of distortion or discoloration of adjacent materials.

Make certain that the lifting methods used to lift the heater and the method of suspension used in the ﬁ eld installation of the heater are capable of uniformly supporting the weight of the heater at all times. Failure to heed this warning may result in property damage or personal injury!

*All hanging hardware and wood is not included with the unit (To be ﬁ eld supplied).

Figure 3B - Heater Mounting 100/400 MBTU Unit Sizes

GAS SUPPLY PIPING

T o av oid equipment damage or possible personal injury , do not connect gas piping to this unit until a supply line pressure/leak test has been completed. Connecting the unit before completing the pressure/leak test may damage the unit gas valve and result in a ﬁ re hazard.

Do not rely on a shut off valve to isolate the unit while conducting gas pressure/leak tests. These valves may not be completely shut off, exposing the unit gas valve to excessive pressure and damage.

PIPE SIZING

To provide adequate gas pressure at the gas unit heater, size the gas piping as follows:

1. Find the cu ft/hr by using the following formula: Input Btu/Hr.

Cu ft/hr =

1000

2. Refer to Table 3. Match length of pipe in feet with appropriate “Gas Input - Cu Ft/Hr” figure. This ﬁ gure can then be matched to the pipe size at the left of the table.

Example: It is determined that a 67 foot (20.4m) run of gas pipe is required to connect a 200 MBTU gas unit heater to a 1,000 Btu/cu. ft (0.29 kW) natur al gas supply .

200,000 Btu/hr 1,000 Btu/cu ft

= 200 Cu ft/hr

NOTICE: If more than one gas unit heater is to be served by the same piping arrangement, the total cubic feet per hour input and length of pipe must be considered.

NOTICE: If the gas unit heater is to be ﬁ red with LP gas, refer to Table 3 and/or consult the local LP gas dealer for pipe size information.

NOTICE: HEATER INSTALLATION FOR USE WITH PROPANE (BOTTLED) GAS MUST BE MADE BY A QUALIFIED L.P. GAS DEALER OR INSTALLER. HE WILL INSURE THAT PROPER JOINT COMPOUNDS ARE USED FOR MAKING PIPE CONNECTIONS; THAT AIR IS PURGED FROM LINES; THAT A THOROUGH TEST IS MADE FOR LEAKS BEFORE OPERATING HEATER; AND THAT IT IS PROPERLY CONNECTED TO PROPANE GAS SUPPLY SYSTEM.

Using Table 3, a 1 inch pipe is needed.

Before any connection is made to an existing line supplying other gas appliances, contact the local gas

NOTICE: See General Safety Information section for English/SI (metric) unit conversion factors.

company to make certain that the existing line is of adequate size to handle the combined load.

Table 3 - Gas Pipe Size

Maximum Capacity of Pipe in Cubic Feet of Gas per Hour (Cubic Meters 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 0.60 Speciﬁ c Gravity Gas)

Nominal Iron Internal Length of Pipe, Feet (meters)

Dia. 10 20 30 40 50 60 70 80 90 100 125 150 175 200

Pipe Size

Inches Inches (3.0) (6.1) (9.1) (12.2) (15.2) (18.3) (21.3) (24.4) (27.4) (30.5) (38.1) (45.7) (53.3) (61.0) 1/2 0.622 175 120 97 82 73 66 61 57 53 50 44 40 37 35 (4.96) (3.40) (2.75) (2.32) (2.07) (1.87) (1.73) (1.61) (1.50) (1.42) (1.25) (1.13) (1.05) (0.99) 3/4 0.824 360 250 200 170 151 138 125 118 110 103 93 84 77 72 (10.2) (7.08) (5.66) (4.81) (4.28) (3.91) (3.54) (3.34) (3.11) (2.92) (2.63) (2.38) (2.18) (2.04) 1 1.049 680 465 375 320 285 260 240 220 205 195 175 160 145 135 (19.3) (13.2) (10.6) (9.06) (8.07) (7.36) (6.80) (6.23) (5.80) (5.52) (4.96) (4.53) (4.11) (3.82) 1-1/4 1.380 1400 950 770 660 580 530 490 460 430 400 360 325 300 280 (39.6) (26.9) (21.8) (18.7) (16.4) (15.0) (13.9) (13.0) (12.2) (11.3) (10.2) (9.20) (8.50) (7.93) 1-1/2 1.610 2100 1460 1180 990 900 810 750 690 650 620 550 500 460 430 (59.5) (41.3) (33.4) (28.0) (25.5) (22.9) (21.2) (19.5) (18.4) (17.6) (15.6) (14.2) (13.0) (12.2) 2 2.067 3950 2750 2200 1900 1680 1520 1400 1300 1220 1150 1020 950 850 800 (112) (77.9) (62.3) (53.8) (47.6) (43.0) (39.6) (36.8) (34.5) (32.6) (28.9) (26.9) (24.1) (22.7) 2-1/2 2.469 6300 4350 3520 3000 2650 2400 2250 2050 1950 1850 1650 1500 1370 1280 (178) (123) (99.7) (85.0) (75.0) (68.0) (63.7) (58.0) (55.2) (52.4) (46.7) (42.5) (38.8) (36.2) 3 3.068 11000 7700 6250 5300 4750 4300 3900 3700 3450 3250 2950 2650 2450 2280 (311) (218) (177) (150) (135) (122) (110) (105) (97.7) (92.0) (83.5) (75.0) (69.4) (64.6) 4 4.026 23000 15800 12800 10900 9700 8800 8100 7500 7200 6700 6000 5500 5000 4600 (651) (447) (362) (309) (275) (249) (229) (212) (204) (190) (170) (156) (142) (130)

1. Determine the required Cu. Ft. / Hr. by dividing the rated heater input by 1000. For SI / Metric measurements: Convert unit Btu. / Hr. to kilowatts. Multiply the units input (kW) by 0.0965 to determine Cubic Meters / Hour. 2. FOR NATURAL GAS: Select the pipe size directly from the table. 3. FOR PROPANE GAS: Multiply the Cu. Ft. / Hr. value by 0.633; then use the table. 4. Refer to the metric conversion factors listed in General Safety section for more SI unit measurements/conversions.

PIPE INSTALLATION

D3631C

1. Install the gas piping in accordance with applicable local codes.

2. Check gas supply pressure. Each unit heater must be connected to a manifold pressure and a gas supply capable of supplying its full rated capacity (see tabe 4). A field LP tank regulator must be used to limit the supply pressure to maximum of 14 inch WC (3.5 kPa). All piping should be sized in accordance with the latest edition of ANSI Standard Z223.1, National Fuel Gas Code; in Canada, according to CSA B149. See Tables 1 and 3 for correct gas supply piping size. If gas pressure is excessive on natural gas applications, install a pressure regulating valve in the line upstream from the main shutoff valve.

3. Adequately support the piping to prevent strain on the gas manifold and controls.

4. To prevent the mixing of moisture with gas, run the take-off piping from the top, or side, of the main.

5. Separated combustion unit heaters optional twostage units, and hydraulic modulating units are supplied with a combination valve which includes:

(a) Manual “A” valve (b) Manual “B” valve

Pipe directly in to combination valve (see Figure 4).

6. A 1/8 inch NPT plugged tapping, accessible for test gauge connection, must be installed immediately upstream of the gas supply connection to the appliance.

7. Provide a drip leg in the gas piping near the gas unit heater. A ground joint union and a manual gas shutoff valve should be installed ahead of the unit heater controls to permit servicing. The manual main shutoff valve must be located external to the jacket. See Figure 4.

8. Make certain that all connections have been adequately doped and tightened.

Do not overtighten the inlet gas piping into the valve. This may cause stresses that would crack the valve!

NOTICE: Use pipe joint sealant resistant to the action of liquefied petroleum gases regardless of gas conducted.

Check all pipe joints for leakage using a soap solution or other approved method. Never use an open flame or severe personal injury or death may occur.

Figure 4 - Pipe Installation, Standard Controls

Never use an open flame to detect gas leaks. Explosive conditions may e xist which would result in personal injury or death.

The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa).

The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig (3.5 kPa).

Table 4 - Gas Piping Requirements

SINGLE STAGE GAS PIPING REQUIREMENTS*

Gas Type Natural Gas Propane (LP) Gas Manifold 3.5 inch WC 10.0 inch WC

Pressure (0.9 kPa) (2.5 kPa)

14.0 inch WC Max 14.0 inch WC Max

Supply Inlet (3.5 kPa) (3.5 kPa) Pressure

(1.2 kPa) (2.7 kPa) *For single stage application only at normal altitudes.

Gas Type Natural Gas Propane (LP) Gas Supply Inlet 6.5 inch WC Min 11.5 inch WC Min

Pressure (1.6 kPa) (2.9 kPa)

**For two stage applications only at normal altitudes.

5.0 inch WC Min 11.0 inch WC Min

TWO STAGE GAS PIPING REQUIREMENTS**

ELECTRICAL CONNECTIONS

HAZARDOUS VOL TAGE!

disconnect ALL ELECTRIC POWER INCLUDING REMOTE DISCONNECTS BEFORE SERVICING. Failure to disconnect power before servicing can cause severe personal injury or death.

Standard units are shipped for use on 115 volt, 60 hertz single phase electric power. The motor nameplate and electrical rating on the transformer should be checked before energizing the unit heater electrical system. All external wiring must conform to the latest edition of ANSI/NFPA No. 70, National Electrical Code and applicable local codes; in Canada, to the Canadian Electrical Code, Part 1 CSA Standard C22.1.

Do not use any tools (i.e. screwdriver, pliers, etc.) across the terminals to check for power . Use a v oltmeter .

* Thermostat wires tagged “W” and “G” must be connected together except when using a general purpose "SPDT" 24VAC relay and a standard thermostat with subbase.

Figure 5 - C1267G

THERMOSTAT HEAT ANTICIPAT OR ADJUSTMENTS:

The initial heat anticipator setpoint should equal the thermostat's current amperage draw when the unit is firing. This setpoint should be measured for the best results. Use the recommended ranges as a guide. If further information is needed, consult your thermostat manufacturer's instructions.

It is recommended that the electrical power supply to each unit heater be provided by a separate, fused and permanently live electrical circuit. A disconnect switch of suitable electrical rating for each unit heater should be located as close to the gas valve and controls as possible. Each unit heater must be electrically grounded in accordance with the latest edition of National Electric Code, ANSI/NFPA No. 70 or CSA Standard C22.1. Sample wiring connections are depicted in Figures 5, 6, 7, 8 & 9.

The transformer supplied with this unit heater is internally fused. Any overload or short circuit will ruin the transformer.

THERMOSTAT WIRING AND LOCATION

NOTICE: The thermostat must be mounted on a vertical vibration-free surface free from air currents and in accordance with the furnished instructions.

Mount the thermostat approximately 5 feet (1.5 m) abov e the floor in an area where it will be exposed to a free circulation of average temperature air. Always refer to the thermostat instructions as well as our unit wiring diagram and wire accordingly. Avoid mounting the thermostat in the following locations:

1. Cold areas - Outside walls or areas where drafts may affect the operation of the control.

2. Hot areas - Areas where the sun's rays, radiation, or warm air currents may affect control operation.

3. Dead areas - Areas where air cannot circulate freely, such as behind doors or in corners.

Recommended Heat Anticipator Setting Ranges:

25 ft. (7.6m) 50 ft. (15.2m) Gas Ignition Type T'stat Wiring T'stat Wiring

For Power Vented Units: 0.85 to 0.90 A 0.90 to 1.1 A Intermittent (Spark) Max. Setting on T'stat

FAN TIME DELAY CONTROL

Leads from time delay controls are factory wired to the junction box. The fan control is a time delay relay (approximately 45 seconds ON, 65 seconds OFF). The fan control is rated at 17 amps.

NOTICE: The start-up fan delay must not exceed 90 seconds from a cold start.

NOTICE: For all wiring connections, refer to the wiring diagram that your unit is equipped with (either afﬁ xed to the side jacket or enclosed in your unit's installation instruction envelope). Should any original wire supplied with the heater have to be replaced, it must be replaced with wiring material having a temperature rating of at least 105°C.

Should any high limit switch wires have to be replaced, they m ust be replaced with wiring material having a temperature rating of 200°C minimum.

Figure 6

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