Si (Metric) Conversion Factors; Before You Begin - Modine Manufacturing PTX Installation And Service Manual

Gas-fired unit heaters

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Table of Contents

SPECIAL PRECAUTIONS / SI (METRIC) CONVERSION FACTORS

CAUTION

16. Purging of air from gas supply line should be performed

as described in the National Fuel Gas Code, ANSI Z223.1

(NFPA 54) - latest edition. In Canada, installation must be

in accordance with CSA-B149.1.

17. When leak testing the gas supply piping system, the

appliance and its combination gas control must be

isolated during any pressure testing in excess of 14" W.C.

(1/2 psi).

18. The unit should be isolated from the gas supply piping

system by closing its field installed manual shut-off valve.

This manual shut-off valve should be located within 6' of

the heater.

19. Turn off all gas before installing appliance.

20. Ensure that the supply voltage to the appliance, as

indicated on the serial plate, is not less than 5% below the

rated voltage.

21. Check the gas inlet pressure at the unit upstream of the

combination gas control. The inlet pressure should be

6-7" W.C. on natural gas or 11-14" W.C. on propane. If

inlet pressure is too high, install an additional pressure

regulator upstream of the combination gas control.

22. Service or repair of this equipment must be performed by

a qualified service agency.

23. Do not attempt to reuse any mechanical or electronic

ignition controller which has been wet. Replace defective

controller.

IMPOR T ANT

1. To prevent premature heat exchanger failure, do not locate

ANY gas-fired appliances in areas where corrosive vapors

(i.e. chlorinated, halogenated, or acidic) are present in the

atmosphere.

2. To prevent premature heat exchanger failure, the input to

the appliance as indicated on the serial plate must not

exceed the rated input by more then 5%.

3. To prevent premature heat exchanger failure, observe

heat exchanger tubes. If the tubes become red while

blower and furnace are in operation, check to be sure the

blower has been set to the proper rpm for the application.

Refer to page 19 for Blower Adjustments.

4. Start-up and adjustment procedures should be performed

by a qualified service agency.

5. To check most of the Possible Remedies in the trouble-

shooting guide listed in Table 30.1 refer to the applicable

sections of the manual.

BEFORE YOU BEGIN

CAUTION

1. All literature shipped with this unit should be kept for future

use for servicing or service diagnostics. Leave manual with

the owner. Do not discard any literature shipped with this unit.

2. Consult piping, electrical, and venting instructions in this

manual before final installation.

3. Do not attach ductwork, air filters, or polytubes to any

propeller unit heater.

In the U.S., the installation of these units must comply with the

National Fuel Gas Code, ANSI Z223.1 (NFPA 54) - latest edition

and other applicable local building codes. In Canada, the

installation of these units must comply with local plumbing or

waste water codes and other applicable codes and with the

current code CSA-B149.1.

1. All installation and service of these units must be

performed by a qualified installation and service agency

only as defined in ANSI Z223.1 (NFPA 54) - latest edition or

in Canada by a licensed gas fitter.

2. This unit is certified with the controls furnished. For

replacements parts, please order according to the

replacement parts list on serial plate. Always know your

model and serial numbers. Modine reserves the right to

substitute other authorized controls as replacements.

3. Unit is balanced for correct performance. Do not alter fan

or operate motors at speeds below what is shown in this

manual.

4. Information on controls is supplied separately.

5. The same burner is used for natural and propane gas.