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

Figure 7

Figure 8

Figure 9

INSTALLATION - VENTING

NOTICE: Combustion and exhaust venting instructions below describe two-pipe venting. If venting concentrically, a Concentric Vent Kit is required and instructions included in the kit should be followed.

COMBUSTION AIR VENTING AND PIPING

Never operate unit heaters without combustion air and flue gas piping in place or severe personal injury or death may occur!

CARBON MONOXIDE! Your venting system must not be blocked by any snow, snow drifts, or any foreign matter. Inspect your venting system to ensure adequate ventilation exists at all times! Failure to heed these warnings could result in Carbon Monoxide Poisoning (symptoms include grogginess, lethargy, inappropriate tiredness, or flu-like symptoms).

1. The combustion air system installation must be in accordance with the current National Fuel Gas Code-NFPA 54 or ANSI Z223.1 National Fuel Gas Code. In Canada, installation must be in accordance with CSA-B149.1 “Installation Code for Natural Gas Burning Appliances and Equipment” and CSA-B149.2 “Installation Code for Propane Burning Appliances and Equipment”.

6. The combustion air system must be installed to prevent collection of condensate. Pitch horizontal pipes downward 1/4 inch per foot (21mm/m) toward the inlet cap to facilitate drainage. Vertical combustion air pipes should be piped as depicted in Figure 10.

The equivalent length of the vent system must not be less than 5 feet and must not exceed 50 feet (15.2m). Equivalent length equals the total length of straight pipe plus 10 feet (4.6m) for each 90° elbow and 5 feet (1.5m) for each 45° elbow.

NOTICE: For optimum performance keep the combustion air system as straight as possible.

8. Each slip joint must be secured with at least three corrosion resistant screws. Two full turns of 3M #425 Aluminum Foil Tape or its equivalent must then be used to seal each joint. General Electric RTV-108, Dow-Corning RTV-732 or an equivalent ma y be used instead of the tape.

9. For horizontal combustion air systems longer than 5 feet (1.5m), the system must be supported from overhead building structures at 3 f oot (1m) intervals.

EXHAUST VENTING

Never operate unit heaters without

combustion air and ﬂ ue gas piping in place or severe personal injury or death may occur!

2. A Breidert Type L or Fields inlet cap, furnished by the customer, must be installed at the termination point of the combustion air system, Figures 10 & 11.

NOTICE: The top of the inlet cap is to be no less than 12 inches (305mm) from the top of the vent cap, see Figures 10 & 11.

3. Each unit heater MUST have it’s own combustion air system. It MUST NOT be connected to other air intake systems.

4. Use single wall pipe constructed of 26-gauge galvanized steel or a material of equivalent durability and corrosion resistance for the combustion air system.

Never use pipe of a diameter other than that speciﬁ ed in Table 1, page 4! Never use PVC, ABS or any other non-metallic pipe for venting! To do so may result in serious damage to the unit and or severe personal injury or death!

5. Long runs of single wall combustion air piping passing through an unheated space may require insulating if condensation becomes noticeable.

1. Vent system installation must be in accordance with the current National Fuel Gas Code-NFPA 54 or ANSI Z223.1 National Fuel Gas Code. In Canada installation must be in accordance with CSA-B149.1 “Installation Code for Natural Gas Burning Appliances and Equipment” and CSA-B149.2. “Installation Code for Propane Burning Appliances and Equipment”.

2. A Breidert Type L or Fields vent cap, furnished by the customer, must be installed at the termination point of the vent system, Figures 10 & 11.

3. Each unit heater MUST have it’s own vent system. It MUST NOT be connected to other vent systems or to a chimney.

4. Use single wall pipe constructed of 26 GA galvanized steel or a material of equivalent durability and corrosion resistance for the vent system. For installations in Canada, use corrosion resistant and gas-tight, listed vent pipe conforming with local building codes, or in the absence of local building codes, with current 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.

INSTALLATION - VENTING (continued)

Never use pipe of a diameter other than that specified in Table 1, page 4! Never use PVC, ABS or any other non-metallic pipe for venting! To do so may result in serious damage to the unit and or severe personal injury or death!

5. Any run of single wall vent pipe passing through an unheated space must be insulated with an insulation suitable to 550°F (288°C).

6. The vent system must be installed to prevent collection of condensate. Pitch horizontal pipes downward 1/4 inch per foot (21mm/m) toward the vent cap to facilitate drainage. Vertical vent pipes should be piped as depicted in Figure 10.

7. The equivalent length of the vent system must not be less than 5 feet (1.5m) and must not exceed 50 feet (15.2m). Equivalent length equals the total length of straight pipe plus 10 feet (4.6m) for each 90° elbow and 5 feet (1.5m) for each 45° elbow.

8. Each slip joint must be secured with at least three corrosion resistant screws. Two full turns of 3M #425 Aluminum Foil tape or its equivalent must then be used to seal each joint. General Electric RTV-108, Dow-Corning RTV-732 or an equivalent ma y be used instead of the tape.

9. For horizontal vent systems longer than 5 feet (1.5m), the system must be supported from overhead building structures at 3 foot (1m) intervals.

10. The exhaust vent system must remain at a minimum distance of 6 inches (152mm) from all combustible materials. Any part of the vent system that passes through a combustible material must be properly insulated.

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

For a VERTICAL vent pipe section that passes through a ﬂ oor or roof, an opening 4 inches (102mm) greater in diameter is required. The opening must be insulated and ﬂ ashed in accordance with applicable installation codes.

A HORIZONTAL section of an exhaust vent system that passes through a combustible wall must be constructed and insulated as shown in Figure 11A.

11. The top of a VERTICALLY VENTED e xhaust system must extend at least 3 f eet (1m) above the roof surface that it passes through. The point of termination for a HORIZONTALLY VENTED exhaust system must be at least 12 inches (305mm) from the exterior of the wall that it passes through. Refer to Table 5 and Figures 10A and 11A for additional vent termination clearance requirements.

Table 5

Vent Systems

Termination Clearance Requirements

Minimum Clearance

Structure/Object

Door, window, or gravity vent inlet; combustion air inlet for other appliances

Forced air inlet within 10 feet 3 feet above 6 feet (1.8m) Adjoining Building or parapet 6 feet 6 feet (1.8m)

Adjacent public walkways

Electric, gas meters & regulators

Above grade level 1 foot 1 foot (0.3m)

for Termination Locations

USA CANADA

9 inch for 10,000 to 50,000 BTU/Hr input; 12 inch for input exceeding 50,000 BTU/Hr.

7 feet above grade

4 feet horizontal

9 inch (230mm) for 10,000 to 50,000 BTU/Hr input; 12 inch (305mm) for input exceeding 50,000 BTU/Hr.

7 feet (2.1m) above grade

3 feet (0.9m) horizontally from meter/regulator asembly. 6 feet (1.8m), any direction, from a gas service regulator vent outlet

Figure 10 - Vertical Intake/Vent Installation

* Size according to expected snow depth. ** If excessive condensation develops, a drip leg with a condensate drain may be required. Insulating the pipes

may eliminate the problem.

Figure 10A - Horizontal Intake/Vent Locations

Figure 11 - Vertical Vent Installation

Figure 11A - Horizontal Vent Installation

OPERATION

Never operate the unit beyond the speciﬁ ed limits or severe damage to and or premature failure of the unit will result!

EXPLANATION OF CONTROLS (see Figure 12)

1. Each Separated Combustion Unit Heater comes

equipped with a power vent system that consists of a power venter motor and b lower, pressure switch and sealed ﬂ ue collector.

The addition of external draft hoods or power venters is not permitted. Addition of such devices may cause severe unit malfunction or failure!

2. The power venter motor is energized by the room

thermostat when a demand for heat is sensed. The pressure switch measures the pressure differential between the air inlet and exhaust vent systems. If the differential is correct the indirect spark ignition system is energized.

Under no conditions is the unit

to be ﬁ red if the power venter is not operable or severe personal injury or death may occur!

3. The indirect spark ignition system consists of an

ignition module, a dual combination valve, and a spark-ignited pilot burner. When the pressure s witch is closed, the pilot valve opens as a spark is generated to light the pilot. When the flame is sensed by the flame sensing circuit the spark ceases and the main gas valve is opened to supply gas to the main burners. Once the thermostat has been satisfied, the vent system and gas valve are simultaneously deenergized stopping all gas ﬂ ow to the unit.

4. The limit switch interrupts the ﬂ ow of electric current

to the main gas valve if the unit heater becomes overheated.

5. The fan switch delays the operation of the fan for 60

to 90 seconds once the thermostat is closed and continues fan operation for 60 to 90 seconds after the thermostat opens.

INITIAL LIGHTING

1. Open the manual gas valve, in the gas supply line to the unit heater. Loosen the union in the gas supply line to purge it of air. Tighten the union and check for leaks.

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

Before attempting to light or relight pilot, wait 5 minutes to allow gas which may have accumulated in the b urner compartment to escape.

2. Turn on the electrical power. The unit heater should now be under the control of the thermostat. Set the thermostat to its highest setting, the power venter motor should start and burner ignition occur. Allow the unit heater to operate until the fan starts then set the thermostat to its lowest setting. The burners and power venter motor should stop operating immediately while the fan continues to operate until the fan time delay times out, shutting it off. Reset the thermostat to the desired operational setting.

CHECKING UNIT HEATER RATE

Never overﬁ re the unit heater, as this may cause unsatisfactory operation or shorten the life of the heater.

Gas appliances are rated based on sea level operation with no adjustment required at elevations up to 2000 f eet. At elevations above 2000 feet, input ratings should be reduced by 4 percent for each 1000 f eet abov e sea le vel. Check the input rate as follows:

1. Turn off all other gas appliances that utilize the same

gas meter as the unit heater.

2. Let the unit heater run for 15 minutes.

3. Using the gas meter, clock the time that it takes to

burn 1 cubic foot of gas.

4. Insert the time, in seconds, into the formula below.

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

6. The wall ther mostat, supplied optionally, is a temperature sensitive switch that operates the vent and ignition systems to control the temperature of the space being heated.

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

RATE in = HEATING VALUE(BTU/FT3)(3600S/HR)

Time (s/ft

EXAMPLE: If: heating value = 1000 BTU/ft

time/ft3 = 18 s/ft

RATE in = (1000 BTU/ft3) (3600 s/hr)

18 s/ft

RATE in = 200,000 BTU/hr

)

Figure 12 - Burner Components/Unit Controls

Intermittent Pilot Ignition

BURNER DRAWER COMMON PARTS:

1. MAIN BURNERS

2. BURNER MANIFOLD

3. AIR SHUTTERS

4. BURNER SPRINGS

5. MAIN BURNER ORIFICE

6. TRANSFORMER

7. PILOT TUBING

CONTROLS (REFER TO UNIT WIRING DIAGRAM): 8A. MAIN GAS VALVE (HONEYWELL) 8B. MAIN GAS VALVE (WHITE-RODGERS)

9. HONEYWELL IGNITOR

10. HONEYWELL PILOT BURNER

12. FAN TIME DELAY SWITCH

13. HI LIMIT (LOCATED ON

REAR HEADER PLATE OF HEAT EXCHANGER)

WARNIN

Honeywell

)

MV/

GND

BURNER

(

CONTINUOUS RE-TRY

100% SHUTOFF IP

SEC. TRIAL

)

(GND

TH-W 7

S8600M

OPT.)

(

IGNITION

SPA

NORMAL

(HARD FLAME)

LIFTING

TOO MUCH AIR)

YELLOW TIPPING

(MARGINAL)

YELLOW FLAME

(TOO LITTLE AIR)

OPERATION (continued)

Table 6 - Main Burner Oriﬁ ce Schedule*

1000

BTU

HEA TING V ALUE

MANIFOLD

PRESSURE

FT 3/HR

ORIFICE DRILL

/HR

ORIFICE DRILL

/HR

ORIFICE DRILL

/HR

ORIFICE DRILL

/HR

ORIFICE DRILL

/HR

ORIFICE DRILL

/HR

ORIFICE DRILL

/HR

ORIFICE DRILL

/HR

ORIFICE DRILL

/HR

ORIFICE DRILL

INPUT

100 125 150 175 200 225 250 300 350 400

* This schedule is for units operating at normal altitudes of 2000 feet (610m) or less. SPECIAL ORIFICES ARE REQUIRED FOR INSTALLATIONS ABOVE 2,000 FT. (610M).

When installed in Canada, any references to deration at altitudes in excess of 2000 feet (610m) are to be ignored. At altitudes of 2000 to 4500 feet (610 to 1372m), the unit heaters must be oriﬁ ced to 90% of the normal altitude rating, and be so marked in accordance with the ETL certiﬁ cation.

1075 BTU/Ft

(40.1 MJ/m3)

3.5 inch WC (0.87kPA)

96 42

120

140

163

186

210

233

280

326

372

2500 BTU/Ft

PROPANETYPE OF GAS NATURAL

(93.1 MJ/m3)

10 inch WC

(2.49 kPA)

40 54 50 54 60 54 70 54 80 54 90 54

100

120

140

160

NO. OF

BURNER

ORIFICES

4 5 6 7 8

9 10 12 14 16

PRIMARY AIR SHUTTER ADJUSTMENT

After the unit has been operating for at least 15 minutes, adjust the primary air flow to the burners. Turn the friction-locked, manually-rotated air shutters clockwise to close, or counterclockwise to open (see Figures 12 and 14).

NOTICE: There may be momentary and spasmodic orange flashes in the flame. This is caused by the burning of airborne dust particles, and not to be confused with the yellow tipping, which is a stable or permanent situation when there is insufficient primary air.

Figure 13 - Main Burner Flames

PILOT ADJUSTMENT

1. Remove the pilot adjustment cap.

2. Adjust the pilot screw to provide a properly sized ﬂ ame.

3. A proper pilot flame is a soft steady flame that envelops 3/8 to 1/2-inch (9.5 to 12.7 mm) of the thermocouple tip.

4. Replace the pilot adjustment cap.

MANIFOLD PRESSURE ADJUSTMENT

If the manifold pressure requires minor adjustment, remove the cap from the pressure regulator and turn the adjustment screw clockwise to increase the pressure, or counterclockwise to decrease the pressure. The adjusted manifold pressure should not vary more than 10% from the pressures speciﬁ ed in Table 6.

For correct air adjustment, close the air shutter until yellow tips in the flame appear. Then open the air shutter to the point just beyond the position where yellow tipping disappears. Refer to Figure 13.

MAINTENANCE

PERIODIC SERVICE

NOTICE: The heater and vent system should be checked once a year by a qualiﬁ ed technician.

All Maintenance/Service information should be recorded accordingly on the Inspection Sheet provided in this manual.

Open all disconnect switches and disconnect all electrical and gas supplies and secure in that position before servicing unit. Failure to do so may result in personal injury or death from electrical shock.

Gas tightness of the safety shutoff valves must be chec ked on at least an annual basis.

To check gas tightness of the safety shut-off valves, turn off the manual valve upstream of the appliance combination control. Remove the 1/8 inch pipe plug on the inlet side of the combination control and connect a manometer to that tapping. Tur n 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 leak is detected, use a soap solution to check all threaded connections. If no leak is found, combination control is faulty and must be replaced before putting appliance back in service.

Should maintenance be required, perform the following inspection and service routine:

1. Inspect the area near the unit to be sure that there is no combustible material located within the minimum clearance requirements listed in this manual.

Under no circumstances should combustible material be located within the clearances specified in this manual. Failure to provide proper clearance could result in personal injury or equipment damage from ﬁ re.

3. To clean or replace the main burners, remove the bottom panel and compress the spring by moving the burner toward the manifold. Slide the opposite end of the burner downward from the locating slot while retaining spring is still compressed. Pull the burners away from the heat.

4. With the burners removed, wire brush the inside surfaces of the heat exchanger.

5. Remove any dirt, dust, or other foreign matter from the burners using a wire brush and/or compressed air. Ensure that all parts are unobstructed. Inspect and clean pilot burner if necessary.

6. Reassemble the gas unit heater by replacing all parts in reverse order.

7. Relight the pilot (see lighting instruction plate on the unit). Complete the appropriate unit startup procedure as given in the “Operation” section of this manual.

8. Check the burner adjustment. See the “Primary Air Shutter Adjustment” section of this manual.

9. Check all gas control valves and pipe connections for leaks.

10. Check the operation of the automatic gas valve by lowering the setting of the thermostat, stopping the operation of the gas unit heater. The gas valve should close tightly, completely extinguishing the ﬂ ame on the main burners.

11. Inspect and service the motor/fan assemblies. To maintain efficient air flow, inspect and clean the fan blades and guard to prevent buildup of foreign matter.

12. Check lubrication instructions on the motor. If oiling is required, add 3 to 4 drops of electric motor oil as follows: (a.) Light Duty - After three years or 25,000 hours of

operation.

(b.) Average Duty - Annually after three years or

8,000 hours of operation.

(c.) Heavy Duty - Annually after one year or at least

every 1500 hours of operation.

Never over oil the motor or pre-

mature failure may occur!

2. Turn off the manual gas valve and electrical power to the gas unit heater.

13. Check and test the operational functions of all safety devices supplied with your unit.

IDENTIFICATION OF PARTS

Figure 14 - Combustion Chamber

GAS VALVE

MAIN BURNERS

RETAINER SPRING AIR SHUTTERS

Figure 15 - Internal Furnace Assembly

MANIFOLD

PILOT ASSY.

Figure 16 - Separated Combustion Unit Heater

PRESSURE SWITCH

POWER VENT ASSY .

POWER VENT MOTOR

FAN MOTOR

FAN GUARD

AIR INLET

GAS SUPPLY INLET

Table 7 - Power Vented Propellers Troubleshooting Guide

SYMPTOMS

A. Flame lifting from burner

ports.

B. Flame pops back.

C. Noisy ﬂ ame.

D. Yellow tip ﬂ ame (some yellow

tipping on propane gas is permissible).

E. Floating ﬂ ame.

F. Gas Odor.

G. Delayed ignition.

H. Failure to ignite.

POSSIBLE CAUSE(S) CORRECTIVE ACTION

1. Pressure regulator set too high.

2. Defective Regulator.

3. Burner oriﬁ ce too large.

1. Excessive primary air.

2. Burner oriﬁ ce too small.

1. Too much primary air.

2. Noisy pilot.

3. Irregular oriﬁ ce causing whistle or resonance.

4. Excessive gas input.

1. Insufﬁ cient primary air.

2. Clogged main burner ports.

3. Misaligned oriﬁ ces.

4. Clogged ﬂ ue collector.

5. Air shutter linted.

6. Insufﬁ cient combustion air.

1. Blocked venting.

2. Insufﬁ cient combustion air.

3. Blocked heat exchanger.

4. Air leak into combustion chamber or ﬂ ue collector.

1. Shut off gas supply immediately!

2. Blocked heat exchanger/venting.

3. Drafts around heater.

4. Negative Pressure in building.

5. Blocked ﬂ ue collector.

1. Excessive primary air.

2. Main burner ports clogged near pilot.

3. Pressure regulator set too low.

4. Pilot decreases in size when main burners come on.

5. Pilot ﬂ ame too small.

6. Drafts around heater.

7. Improper venting.

1. Main gas off.

2. Lack of power at unit.

3. Thermostat not calling for heat.

4. Defective limit switch.

5. Improper thermostat or transformer wiring at gas valve.

6. Defective gas valve.

1. Reset manifold pressure. Refer to “Operation”.

2. Replace regulator section of combin ation gas valve or complete valve.

3. Check with local gas supplier for proper oriﬁ ce size and replace. Refer to “Operation”.

Close air shutter. Refer to “Operation”.

2. Check with local gas supplier for proper oriﬁ ce size and replace. Refer to “Operation”.

1. Close air shutter.

Reduce pilot gas. Refer to “Operation”.

3. Replace oriﬁ ce.

4. Reset manifold pressure. Refer to “Operation”; Replace regulator section of combination gas valve or complete valve; or Check with local gas supplier for proper oriﬁ ce size and replace. Refer to “Operation”.

1. Open air shutters. Refer to “Operation”.

2. Clean main burner ports.

3. Replace manifold assembly.

4. Clean ﬂ ue collector.

5. Check for dust or lint at air mixer opening and around the air shutter.

6. Clean combustion air inlet openings in bottom panel, see “Installation”.

1. Clean ﬂ ue. Refer to “Installation”.

2. Clean combustion air inlet openings in bottom panel, see “Installation”.

3. Clean heat exchanger.

4. Determine cause and repair accordingly.

1. Inspect all gas piping and repair.

2. Clean heat exchanger/ﬂ ue.

3. Eliminate drafts. Refer to “Installation”.

4. See “Installation”.

5. Clean ﬂ ue collector.

1. Close air shutter. Refer to “Operation".

2. Clean main burner ports.

3. Reset manifold pressure. Refer to “Operation”.

4. Supply piping is inadequately sized. Refer to “Installation”.

5. Clean pilot oriﬁ ce. Refer to “Operation”.

6. Eliminate drafts. Refer to “Installation”.

7. Refer to “Installation”.

1. Open all manual gas valves.

2. Replace fuse or turn on power supply.

3. Turn up thermostat.

4. Check limit switch with continuity tester. If open, replace limit switch.

5. Check wiring per diagrams.

6. Replace gas valve.

Power Vented Propellers Troubleshooting Guide

SYMPTOMS

H. Failure to ignite.

J. Condensation of water vapor.

K. Burner won't turn off.

L. Rapid burner cycling.

M. Noisy.

N. Pilot will not light or will not stay lit.

POSSIBLE CAUSE(S) CORRECTIVE ACTION

7. Defective thermostat.

8. Defective transformer.

9. Loose wiring.

10. Defective ignition control.

1. Improper venting.

1. Poor thermostat location.

2. Defective thermostat.

3. Improper thermostat or transformer wiring at gas valve.

4. Short circuit.

5. Defective or sticking gas valve.

6. Excessive gas supply pressure.

1. Loose electrical connections at gas valve or thermostat.

2. Excessive thermostat heat anticipator.

3. Unit cycling on high limit.

4. Poor thermostat location.

5. Draft on Pilot.

6. Defective ignitor control (if applicable).

7. Unit cycling on high limit.

8. Defective high limit switch.

1. Fan blades loose.

2. Fan blades dirty.

3. Vibration isolators deteriorated.

4. Bearings are dry.

1. Main gas off.

2. Pilot adjustment screw turned too low on combination/automatic main gas valve.

3. Air in gas line.

4. Incorrect lighting procedure.

5. Dirt in pilot oriﬁ ce.

6. Extremely high or low gas pressure.

7. Defective thermocouple.

8. Drafts around unit.

9. Pilot valve not opening (faulty wiring).

10. No spark (faulty wiring).

11. Defective gas valve.

7. Check thermostat and replace if defective.

8. Be sure 115 volts is supplied to the transformer primary, then check for 24 volts at secondary terminal before replacing.

9. Check and tighten all wiring connec tions per diagrams.

10. Replace, if necessary. Also see W, X & Y symptoms.

1. Refer to “Installation, Venting”.

1. Relocate thermostat away from drafts.

2. Replace thermostat.

3. Check wiring per diagrams.

4. Check operation at valve. Look for short (such as staples piercing thermostat wiring), and correct.

5. Replace gas valve.

6. Refer to “Operation”.

1. Tighten all electrical connections.

2. Adjust thermostat heat anticipator for longer cycles. Refer to “Operation”.

3. Check for proper air supply across heat exchanger.

4. Relocate thermostat. (Do not mount thermostat on unit).

5. Eliminate drafts. Refer to Installation.

6. Replace ignitor.

7. Check for proper air supply across heat exchanger.

8. Jumper limit switch terminals 1 and 2. If burner operates normally, replace switch.

1. Replace or tighten.

2. Clean fan wheel.

3. Replace vibration isolators.

4. Oil bearings on fan motor. (Refer to label on motor).

1. Open all manual gas valves.

2. Increase size of pilot ﬂ ame. Refer to “Operation”.

3. Purge air from gas supply.

4. Follow lighting instruction label adjacent to gas valve.

5. Remove pilot oriﬁ ce. Clean with compressed air or solvent. (Do not ream).

6. Refer to “Operation”.

7. Check thermocouple connection, and replace if defective.

8. Eliminate drafts. Refer to “Installation”.

9. Inspect and correct all wiring.

10. Inspect and correct ignition system wiring. See symptoms W, X, & Y.

11. Replace.

Power Vented Propellers Troubleshooting Guide

SYMPTOMS

O. Fan will not run.

P. Fan motor turns on and off while burner is operating.

Q. Fan motor will not stop.

R. Not enough heat.

T. Too much heat.

U. Cold air is delivered on start

up.

V. Cold air is delivered during

heater operation.

W. No Spark.

POSSIBLE CAUSE(S) CORRECTIVE ACTION

1. Loose wiring.

2. Defective motor overload protector or defective motor.

3. Defective fan switch.

1. Fan switch heater element improperly

wired.

2. Defective fan switch.

3. Motor overload protector cycling on and off.

4. Motor not properly oiled.

1. Improperly wired fan control.

2. Main burners not lighting while thermostat calls for heat.

3. Defective fan switch.

1. Incorrect gas input.

2. Heater undersized.

3. Thermostat malfunction.

4. Heater cycling on limit control.

1. Thermostat malfunction.

2. Heater runs continuously.

1. Fan switch heater element improperly

wired.

1. Incorrect manifold pressure or input.

2. Voltage to unit too high.

3. Air through put too high.

1. Thermostat not calling for heat.

2. No low voltage.

3. Spark gap closed or too wide.

4. Broken or cracked ceramic on spark electrode.

1. Check and tighten all wiring connections per diagrams. Thermostat wires tagged “W” and “G” must be connected together (unless special thermostats are used; if so, see thermostat wiring diagram). See electrical connections.

2. Replace motor.

Check for 24V across “H” terminals on fan time dela y switch. If 24V is present, jumper terminals numbered 2 and 4. If motor runs, the fan switch is defective and m ust be replaced. If 24V is not present, check wiring per diagrams.

1. Be sure fan switch heater terminals

are connected per diagrams.

2. Replace fan switch.

3. Check motor amps against motor name plate rating, check voltage, replace fan motor if defective.

4. Refer to label on motor.

1. Check all wiring.

2. Refer to H or N symptoms.

3. Replace fan switch.

1. Refer to “Operation”.

2. This is especially true when the heated space is enlarged. Have the heat loss calculated and compare to the heater output (80% of input). Your gas supplier or installer can furnish this information. If heater is under sized, add additional heaters.

3. Replace thermostat.

4. There should be NO ducts attached to the front of this heater. Check air movement through heat exchanger. Check voltage to fan motor. Clean fan blade and heat exchanger and oil fan motor.

1. Replace thermostat.

2. Check wiring per diagrams; Check operation at valve. Look for short (such as staples piercing thermostat wiring), and correct; Replace gas valve; Refer to “Operation”.

1. Be sure fan switch heater terminals

are connected per diagrams.

1. Refer to “Operation”.

2. Check motor voltage with fan running. Should be 115 volts AC.

3. Refer to “Operation”.

1. Close thermostat contacts.

2. Check for 24V across 24V terminals of S8600.

3. Set gap to 0.1".

4. Replace pilot assembly.

Power Vented Propellers Troubleshooting Guide

SYMPTOMS

X. Spark present but pilot does not light.

Y. Pilot lights — Main valve does not energize.

Z. Hi-Limit switch tripping.

AA. Noisy power venter.

BB. Power venter will not run.

CC. Power venter motor turns on and off while burner is operating.

DD. Power Venter motor will not stop.

POSSIBLE CAUSE(S) CORRECTIVE ACTION

1. Loose S8600 connections.

2. Improper gas pressure.

3. Is spark in pilot gas stream?

4. No pilot gas — do not use match to test - presence of gas is easily detected by the odor.

1. Loose S8600 connections.

2. Cracked or broken sensor ceramic.

3. Check sensor/spark lead for continuity.

4. Measure 24 volts from term. MV to term. MV/PV.

1. Vertical run of ﬂ ue is too short.

2. Unit is overﬁ ring.

3. Air ﬂ ow too low.

4. Defective switch.

1. Power venter wheel loose.

2. Power venter wheel dirty.

3. Power venter wheel rubbing housing.

4. Bearings are dry.

1. Loose wiring.

2. Defective motor overload protector or defective motor.

3. Defective power venter relay.

1. Fan relay heater element improperly wired.

2. Defective venter relay switch.

3. Motor overload protector cycling on and off.

4. Motor not properly oiled.

1. Improperly wired venter relay.

2. Main burners not lighting while thermostat calls for heat.

3. Defective venter relay.

1. Check all connections, term. PV feeds 24V to pilot valve.

2. Check pressure — pressure that is either too high or too low may cause a problem.

3. Spark should arc from electrode.

4. Check pilot line for kinks. Ensure there are no drafts.

1. Check connections-term. MV feeds main valve.

2. Replace pilot assembly.

3. Replace if needed.

4. If present, replace main valve; if not, replace S8600 Igniter.

1. Lengthen vertical run of ﬂ ue pipe (see venting).

2. Burner oriﬁ ce may be too large: verify/replace if req'd.

3. Increase air ﬂ ow; check fan size. Check for proper voltage.

4. Replace.

1. Replace or tighten.

2. Clean power venter wheel.

3. Realign power venter wheel.

4. Oil bearings on power venter motor. (Refer to label on motor).

1. Check and tighten all wiring connec tions per diagrams. Thermostat wires tagged "W" and "G" must be connected together (unless special thermostats are used; if so, see thermostat wiring diagram). See electrical connections.

2. Replace motor.

3. Check for 24V across 1 and 3 terminals on fan relay. If 24V is present, jumper terminals numbered 2 and 4. If motor runs, the relay is defective and must be replaced.If 24V is not present, check wiring per diagrams.

1. Be sure venter relay heater terminals are connected per diagrams.

2. Replace venter relay.

3. Check motor amps against motor name plate rating, check voltage, replace power venter motor if defective.

4. Refer to label on motor.

1. Check all wiring.

2. Refer to H & N symptoms.

3. Replace venter relay.

Figure 17 - Power Venter Assembly

REF. NO. DESCRIPTION 1 Blower Housing Assembly 2 Speed Nut 3 Motor 4 Washer, Plain 5 Plate Adapter 6 Blower Wheel* 7 Mounting Bracket (Pressure Switch) 8 Mounting Bracket (Junction Box) 9 Screw, S.T. 10 Screw, Machine (L = 3/4 inch) 11 Nut, Keps (Ext. Lock Washer) 12 Air Pressure Switch 13 Drill Screw

NOTES: *1) For item No. 6, use counter-clockwise rotation.

2) DO NOT OVERTIGHTEN CELCON NUT! HAND TIGHTEN ONLY! DO NOT USE TOOLS! Approximate 1/3 turn maximum or 8 inch pounds is sufﬁ cient from the point where the tube does not slip in or out.

3) Flue Sizes: 100/175 units: 4 inch dia. ﬂ ue outlet Reducer required – To be supplied by installer. 200/250 units: 5 inch dia. ﬂ ue outlet (no adapter required). 300/400 units: 6 inch dia. ﬂ ue outlet Increaser required – To be supplied by manufacturer.

REF. NO. DESCRIPTION 14 Junction Box Cover 15 Snap Bushing 16 Relay (Motor) 17 Draftor Stack Assembly 18 Tubing (Aluminum) Formation 19 Male Connector 20 Locknut 21 Hole Plug 22 Pressure Switch Cover 23 Drill Screw 24 Junction Box Base 25 Purge Relay (not shown)

- located in Junction Box

HOW TO ORDER REPLACEMENT PARTS

Please send the following inf ormation to your local representative; If further assistance is needed, contact the manufacturer's customer service department.

• Model number

• Serial Number (if any)

• Part description and Number as shown in the Replacement Parts Catalog.

LIMITED WARRANTY

SEPARATED COMBUSTION PROPELLER UNIT HEATERS

1. The “Manufacturer” warrants to the original owner at original installation site that the above model GasFired Heater (“the Product”) will be free from defects in material or workmanship for one (1) year from the date of shipment from the factory, or one and one-half (11/2) years from the date of manufacture, whichever occurs ﬁ rst. The Manufacturer further warrants that the complete heat exchanger, draft hood/ ﬂ ue collector assembly, and burners will be free from defects in material or workmanship for a period of one (1) year from date of manufacture. If upon examination by the Manufacturer the Product is shown to have a defect in material or workmanship during the warranty period, the Manufacturer will repair or replace, at its option, that part of the Product which is shown to be defective.

2. This limited warranty does not apply: (a) if the Product has been subjected to misuse or neglect, has been accidentally or intentionally

damaged, has not been installed, maintained or operated in accordance with the furnished written

instructions, or has been altered or modiﬁ ed in any way by any unauthorized person. (b) to any expenses, including labor or material, incurred during remov al or reinstallation of the Product. (c) to any damage due to corrosion by chemicals, including halogenated hydrocarbons, precipitated in

the air. (d) to any workmanship of the installer of the Product.

3. This limited warranty is conditional upon: (a) advising the installing contractor, who will in turn notify the distributor or manufacturer. (b) shipment to the Manufacturer of that part of the Product thought to be defective. Goods can only be

returned with prior written approval of the Manufacturer. All returns must be freight prepaid.

workmanship.

4. Repair or replacement of any part under this Limited Warranty shall not extend the duration of the warranty with respect to such repaired or replaced part beyond the stated warranty period.

5. THIS LIMITED WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EITHER EXPRESS OR IMPLIED,

AND ALL SUCH OTHER WARRANTIES, INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE HEREBY DISCLAIMED AND EXCLUDED FROM THIS LIMITED WARRANTY. IN NO EVENT SHALL THE MANUFACTURER BE LIABLE IN ANY WAY FOR ANY CONSEQUENTIAL, SPECIAL, OR INCIDENTAL DAMAGES OF ANY NATURE WHATSOEVER, OR FOR ANY AMOUNTS IN EXCESS OF THE SELLING PRICE OF THE PRODUCT OR ANY PARTS THEREOF FOUND TO BE DEFECTIVE. THIS LIMITED WARRANTY GIVES THE ORIGINAL OWNER OF THE PRODUCT SPECIFIC LEGAL RIGHTS. YOU MAY ALSO HAVE OTHER RIGHTS WHICH MAY VARY BY EACH JURISDICTION.

In the interest of product improvement, we reserve the right to make changes without notice.

SEPARATED COMBUSTION PROPELLER

UNIT NUMBER DESCRIPTION

Digit X X X X — 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 + Item

Preﬁ x UT CA FT FM GT IC AL GC SV MT MS AS

(Internal use Only)

Digit #1, 2 - Unit Type [UT]

P3 - Separated Combustion Propeller

Digit #3, 4, 5 - Capacity [CA]

100 - 100,000 BTU/HR 125 - 125,000 BTU/HR 150 - 150,000 BTU/HR 175 - 175,000 BTU/HR 200 - 200,000 BTU/HR 250 - 250,000 BTU/HR 300 - 300,000 BTU/HR 350 - 350,000 BTU/HR 400 - 400,000 BTU/HR

Digit #6 - Furnace Type [FT]

B - Left Side Access

Digit #7 - Heat Exchanger Construction Material [FM]

1 - Aluminized Steel 2 - 409 Stainless Steel 3 - 321 Stainless Steel

Digit #8 - Gas Type [GT]

N - Natural Gas P - Propane Gas (LP) K - Natural Gas w/100% Shutoff

Digit #9 - Ignition Control [IC]

2 - Spark Ignition

Digit #10 - Altitude [AL]

A - 0–1,999 ft. J - 8,000–8,999 ft. B - 2,000–2,999 ft. K - 9,000–9,999 ft. C - 3,000–3,999 ft. L - 10,000–10,999 ft. D - 4,000–4,999 ft. M - 11,000–11,999 ft. F - 5,000–5,999 ft. N - Local Gas Supplier Derate G - 6,000–6,999 ft. P - Canadian High Altitude 2,000–4,500 ft. H - 7,000–7,999 ft.

Digit #11 - Gas Control [GC]

A - Single Stage B - T wo Stage H - Electronic Modulation w/Room Sensing

Digit #12 - Supply Voltage [SV]

1 - 115/1/60 5 - 230/3/60 2 - 208/1/60 6 - 460/3/60 3 - 230/1/60 7 - 575/3/60 4 - 208/3/60 Z - Special

Note: Supply Voltages [SV] 2-7 include ﬁ eld mounted step down transformer.

Digit #13 - Motor Type [MT]

1 - Open Drip Proof 2 - Totally Enclosed

Digit #14 - Blower Motor Sizes [MS]

0 - None/Not Applicable

Digit #15 - Accessories [AS] FACTORY INSTALLED

A8 - Input Derate P6 - Summer/Winter Switch M6 - OSHA Fan Guard S1 - 409 Stainless Steel Burners

S3 - 409 Stainless Steel Flue Collector G1 - 1-Stage T87K Mercury Free

Thermostat w/Subase Kit* G5 - 2-Stage TH5220D Mercury Free Thermostat w/Subbase* *These thermostats are factory ready

for ﬁ eld installation (include factory mounted relay).

† FIELD INSTALLED (AS-____ )

† Field Installed Accessories are not included in the Unit Number. All Field Installed Accessories are entered as a separate line item using the catalog number which utilizes “AS” as a preﬁ x. i.e: A7 becomes AS-A7.

A7 - Pressure Regulator 1/2-2 psi H5 - Low Ambient Control G2 - 1-Stage T87K Mercury Free Thermostat M2-1 -

w/TG511A Guard Kit M2-2 G3 - 1-Stage T834N Mercury Free Thermostat M2-3 w/Fan Switch M3-1 G6 - Locking Thermostat Cover M4 - Vertical Concentric Flue Kit G8 - 1-Stage T6169C Line Voltage Stat M5 - Horizontal Concentric Flue Kit w/Subbase M7 - Two to Four Point Suspension Kit G9 - 1-Stage T822K Mercury Free Thermostat P5 - 24V SPST Relay-Specify Purpose

Q1 - “Y” Splitter Nozzle Q2 - 30° Nozzle

Q3 - 60° Nozzle Q4 - 90° Nozzle Q6 - Vertical Louvers

Vent Caps (4 inch) (Unit Capacity 100-175) Vent Caps (5 inch) (Unit Capacity 200-250) Vent Caps (6 inch) (Unit Capacity 300-400) Adaptors (5-4 inch) (Unit Capacity 100-175)

NOTES:

GAS EQUIPMENT

START-UP

Customer ____________________________________ Job Name & Number _________________________

PRE-INSPECTION INFORMATION

With power and gas off.

Type of Equip:

Serial Number _________________________ Model Number __________________________ Name Plate Voltage: _____________ Name Plate Amperage: _____________ Type of Gas: Natural LP Tank Capacity _______ lbs. Rating: _ _____ BTU @ ____ °F

_______ kg _ _____ kw @ ____ °C

❐ Are all panels, doors, vent caps in place? ❐ Has the unit suffered any external damage? Damage ______________________________ ❐ Does the gas piping and electric wiring appear to be installed in a professional manner? ❐ Has the gas and electric been inspected by the local authority having jurisdiction? ❐ Is the gas supply properly sized for the equipment? ❐ Were the installation instructions followed when the equipment was installed? ❐ Have all ﬁ eld installed controls been installed? ❐ Do you understand all the controls on this equipment? If not, contact your wholesaler or rep.

(DO NOT START this equipment unless you fully understand the controls.)

Unit Heater Duct Furnace Indoor Rooftop

GENERAL

With power and gas off.

❐ Make certain all packing has been removed. ❐ Tighten all electrical terminals and connections. ❐ Check damper linkages for tightness. ❐ Check all fans & blowers for free movement. ❐ Check all controls for proper settings. ❐ Check all set screws on blowers and bearings. ❐ Check belt tightness.

BLOWER

With power on and gas off.

❐ Check voltage L1 _____ L2 _____ L3 _____ ❐ Check rotation of main blower. ❐ Check motor amps L1 _____ L2 _____ L3 _____ ❐ Blower RPM _____________ ❐ Check air ﬁ lters. (Record quantity & size.)

GAS HEATING

With power and gas on.

❐ Inlet gas pressure. ____ in. W.C. or ____ kPa ❐ Pilot & main burner ignition. ❐ Manifold gas pressure. ____ in. W.C. or ____ kPa ❐ Cycle ﬁ restat and/or freezestat. ❐ Check electronic modulation. Set at: __________ ❐ Cycle and check all other controls not listed. ❐ Check operation of remote panel. ❐ Entering air temp. _____ °F or ____ °C ❐ Discharge air temp. (high ﬁ re) ____ °F. or ____ °C ❐ External static pressure _________ in. W.C. ❐ Cycle by thermostat or operating control.

Remarks: ___________________

________________________ ________________________

260 NORTH ELM ST., WESTFIELD, MA 01085

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

www.mestek.com

Sterling QVSF User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual