Modine Manufacturing PV Installation And Service Manual page 2

I I N N S S T T A A L L L L A A T T I I O O N N
S S P P E E C C I I A A L L P P R R E E C C A A U U T T I I O O N N S S
T T H H E E I I N N S S T T A A L L L L A A T T I I O O N N A A N N D D M M A A I I N N T T E E N N A A N N C C E E I I N N S S T T R R U U C C T T I I O O N N S S I I N N T T H H I I S S
M M A A N N U U A A L L M M U U S S T T B B E E F F O O L L L L O O W W E E D D T T O O P P R R O O V V I I D D E E S S A A F F E E , , E E F F F F I I C C I I E E N N T T
A A N N D D T T R R O O U U B B L L E E - - F F R R E E E E O O P P E E R R A A T T I I O O N N . . I I N N A A D D D D I I T T I I O O N N , , P P A A R R T T I I C C U U L L A A R R
C C A A R R E E M M U U S S T T B B E E E E X X E E R R C C I I S S E E D D R R E E G G A A R R D D I I N N G G T T H H E E S S P P E E C C I I A A L L
P P R R E E C C A A U U T T I I O O N N S S L L I I S S T T E E D D B B E E L L O O W W . . F F A A I I L L U U R R E E T T O O P P R R O O P P E E R R L L Y Y
A A D D D D R R E E S S S S T T H H E E S S E E C C R R I I T T I I C C A A L L A A R R E E A A S S C C O O U U L L D D R R E E S S U U L L T T I I N N
P P R R O O P P E E R R T T Y Y D D A A M M A A G G E E O O R R L L O O S S S S , , P P E E R R S S O O N N A A L L I I N N J J U U R R Y Y , , O O R R D D E E A A T T H H . .
1. Disconnect power supply before making wiring connections to
prevent electrical shock and equipment damage. All units must be
wired strictly in accordance with wiring diagram furnished with the
unit.
2. Turn off all gas before installing unit heaters.
3. Gas pressure to unit heater controls must never exceed 14" W.C.
(1/2 psi).
When leak testing the gas supply piping system, the unit and its
combination gas control must be isolated during any pressure
testing in excess of 14" W.C. (1/2 psi).
The unit should be isolated from the gas supply piping system by
closing its field installed manual shut-off valve.
4. Check gas inlet pressure at unit upstream from combination gas
control. The inlet pressure should be 6-7" W.C. on natural gas or
12-14" W.C. on propane gas. Purging of gas piping should be
performed as described in ANSI Z223.1—Latest Edition or in
Canada in CAN/CGA-B149 codes.
5. All units must be vented to the outside atmosphere.
6. Do not install in potentially explosive or flammable atmospheres
laden with grain dust, sawdust, or similar air-borne materials. In
such applications a blower type heater installed in a separate room
with ducting, including appropriate back flow prevention dampers,
to the dust-laden room is recommended.
7. Installation of units in high humidity or salt water atmospheres will
cause accelerated corrosion resulting in a reduction of the normal
life of the units.
8. To prevent premature heat exchanger failure do not locate ANY
gas-fired unit in areas where chlorinated, halogenated or acid
vapors are present in the atmosphere.
9. Avoid installing units in extremely drafty locations. Drafts can cause
burner flames to impinge on heat exchangers which shortens life.
Maintain separation between units so discharge from one unit will
not be directed into the inlet of another.
10. Do not locate units in tightly sealed rooms or small compartments
without provision for adequate combustion air and venting.
Combustion air must have access to the confined space through a
minimum of two permanent openings in the enclosure, at least one
near the bottom. They should provide a free area of one square
inch per 1000 BTU per hour input rating of the unit with a minimum
of 100 square inches for each opening, whichever is greater.
11. Do not install unit outdoors.
12. Do not locate unit closer to combustible materials than the
clearances listed. For all PV/BV sizes, minimum clearance to
combustibles from the bottom is 12", from the left side 18" and
from the right side 6". For PV sizes 30-145 minimum clearance to
combustible materials from the top is 1", clearance for sizes
175-350 is 2", and clearance for the 400 is 3".
For PV sizes 30-100 minimum clearance to combustible materials
from the vent connector is 2", clearance for sizes 125-300 is 3",
and clearance for sizes 350 & 400 is 6".
For all BV sizes, from the top and from the vent connector is 6".
13. Allow at least 6" clearance at the sides and 12" clearance at rear
(or 6" beyond end of motor at rear of unit, whichever is greater) to
provide ample air for combustion and proper operation of fan.
14. The minimum distance from combustible material is based on the
combustible material surface not exceeding 160°F. Clearance from
the top of the unit may be required to be greater than the minimum
specified if heat damage, other than fire, may occur to materials
2 2
above the unit heater at the temperature described.
15. Do not install units below 7 feet measured from the bottom of the
unit to the floor.
16. Modine unit heaters are designed for use in heating applications
with ambient temperatures between 32° F and 90° F. If an
application exists where ambient temperatures can be expected to
fall outside of this range, contact factory for recommendations.
17. Provide clearance for opening hinged bottom for servicing. See
Figure 1. Do not set unit on its bottom.
18. To assure that flames do not impinge on heat exchanger surfaces,
the unit must be suspended in a vertical and level position. Failure
to suspend unit properly may shorten the life of the unit heater.
19. Do not lift unit heater by gas controls, gas manifold, or power
exhauster.
20. Be sure no obstructions block air intake and discharge of unit heater.
21. Do not attach duct work, air filters, or polytubes to any propeller
(PV) model unit heaters.
22. In aircraft hangars, keep the bottom of the unit at least 10' from the
highest surface of the wings or engine enclosure of the highest
aircraft housed in the hangar and in accordance with the require-
ments of the enforcing authority and/or NFPA 409 – Latest Edition.
23. In garages or other sections of aircraft hangars such as offices and
shops which communicate with areas used for servicing or storage,
keep the bottom of the unit at least 7' above the floor. In public
garages, the unit must be installed in accordance with the Standard
for Parking Structures NFPA 88A and the Standard for Repair
Garages NFPA 88B. In Canada, installation of unit heaters in
airplane hangars must be in accordance with the requirements of
the enforcing authority, and in public garages in accordance with
the current CAN/CGA-B149 codes.
24. Consult piping, electrical, and venting instructions in this manual
before final installation.
25. All literature shipped with your unit should be kept for future use for
servicing or service diagnosis. Do not discard any literature shipped
with your unit.
26. When servicing or repairing this equipment, use only Modine
approved service replacement parts. A complete replacement
parts list may be obtained by contacting Modine Manufacturing
Company. Refer to the rating plate on the unit for complete unit
model number, serial number and company address. Any
substitution of parts or controls not approved by Modine will be at
owners risk.
F F i i g g u u r r e e 1 1
Hinged Bottom for Service
WING SCREWS
THAT SECURE
HINGED BOTTOM
THIS IS
DIMENSION C,
PAGE 14 OR 15