Modine Manufacturing PV Installation And Service Manual page 4

I I N N S S T T A A L L L L A A T T I I O O N N
The PV300, PV350 and PV400 have four mounting holes. On
all blower units, except the BV300, BV350 and BV400, two
tapped holes are provided in the top of the unit and two holes in
the blower support bracket. The BV300, BV350 and BV400
have four tapped holes in the top of the unit and two in the
blower support bracket for mounting. T T o o a a s s s s u u r r e e t t h h a a t t f f l l a a m m e e s s a a r r e e
d d i i r r e e c c t t e e d d i i n n t t o o t t h h e e c c e e n n t t e e r r o o f f h h e e a a t t e e x x c c h h a a n n g g e e r r t t u u b b e e s s , , u u n n i i t t m m u u s s t t b b e e
s s u u p p p p o o r r t t e e d d i i n n a a v v e e r r t t i i c c a a l l p p o o s s i i t t i i o o n n , , w w i i t t h h s s u u s s p p e e n n s s i i o o n n h h a a n n g g e e r r s s " " U U P P . . " "
C C h h e e c c k k w w i i t t h h a a l l e e v v e e l l . . T T h h i i s s i i s s i i m m p p o o r r t t a a n n t t t t o o t t h h e e o o p p e e r r a a t t i i o o n n a a n n d d l l i i f f e e o o f f
u u n n i i t t . .
N N o o t t e e : Pipe hanger adapter kits are available as accessories
from Modine. The hardware allows for pipe caps to be secured
into the top of the unit heater with machine screws (machine
screws are 3/8 - 16 x 1.75 UNC-2A THD). The pipe caps can
then accommodate 3/4" NPT pipe for mounting.
F F i i g g u u r r e e 2 2
A A d d j j u u s s t t a a b b l l e e M M o o u u n n t t i i n n g g B B r r a a c c k k e e t t s s
REMOVE SIDE PANELS TO
ADJUST MOUNTING BRACKETS
V V e e n n t t i i n n g g
CAUTION
Gas-fired heating equipment must be vented - do not operate
unvented. A built-in power exhauster is provided - additional
external draft hoods (diverters) or power exhausters are not
required or permitted. Installation must conform with local
building codes or in the absence of local codes, with Part 7,
Venting of Equipment, of the National Fuel Gas Code, ANSI
Z223.1 (NFPA 54) - Latest Edition. In Canada installation
must be in accordance with the National Standard of Canada
CAN/CGA-B149.1 for natural gas units, and CAN/CGA-
B149.2 for propane units.
N N O O T T E E : : A v v e e n n t t is the vertical passageway used to convey flue gases from the
unit or the vent connector to the outside atmosphere. A v v e e n n t t c c o o n n n n e e c c t t o o r r is the pipe
which connects the unit to a vent or chimney.
V V e e n n t t i i n n g g I I n n s s t t r r u u c c t t i i o o n n s s
(Including how to rotate the power exhauster)
1. All vertically vented PV/BV models are venting system category
I. All horizontally vented PV/BV models are venting system
category III.
2. Using Table 1, determine the venting requirements for the
category determined above. A category III unit must conform to
these venting requirements (detailed in following sections) in
addition to those listed below.
3. The power exhauster may be rotated to discharge vertically or
horizontally in either direction (except PV/BV 400). Unfasten
screws connecting power exhauster to vent collar, rotate to
desired location, drill 1/8 inch diameter bite holes and refasten
screws. If positioning the power exhauster to discharge
vertically, a slight offset and use of a drip leg is recommended,
although not required.
4. Models PV30, PV/BV50, 75, 175, 200, 350 and 400 have a
vent transition supplied with the unit. See Table 2 for vent
transition sizes for these models. Fasten the transition to the
power exhauster outlet with at least three corrosion-resistant
sheet-metal screws.
5. Select size of vent pipe to fit power exhauster outlet or vent
transition, where supplied, at rear of unit (see Table 2 for
dimensions). Do not use a vent pipe smaller than the power
4 4
exhauster outlet or vent transition on the unit. Vent pipe should
be galvanized steel or other suitable corrosion-resistant
material. Follow the National Fuel Gas Code (in Canada the
National Standard of Canada) for minimum thickness of vent
material; minimum thickness for vent connectors varies
depending on pipe diameter.
T T a a b b l l e e 2 2
V V e e n n t t P P i i p p e e S S i i z z e e s s f f o o r r U U n n i i t t s s w w i i t t h h T T r r a a n n s s i i t t i i o o n n s s
M M o o d d e e l l
P P V V 3 3 0 0 , , P P V V / / B B V V 5 5 0 0 , , 7 7 5 5
P P V V / / B B V V 1 1 0 0 0 0 , , 1 1 2 2 5 5 , , 1 1 4 4 5 5
P P V V / / B B V V 1 1 7 7 5 5 , , 2 2 0 0 0 0
P P V V / / B B V V 2 2 5 5 0 0 , , 3 3 0 0 0 0
P P V V / / B B V V 3 3 5 5 0 0 , , 4 4 0 0 0 0
T T a a b b l l e e 1 1
A A N N S S I I U U n n i i t t H H e e a a t t e e r r V V e e n n t t i i n n g g R R e e q q u u i i r r e e m m e e n n t t s s
C C a a t t e e g g o o r r y y D D e e s s c c r r i i p p t t i i o o n n
I I
Negative vent pressure
Non-condensing
II Negative vent pressure
Condensing
III Positive vent pressure
Non-condensing
IV Positive vent pressure
Condensing
6. A minimum of 12 inches straight pipe is recommended from the
power exhauster outlet before turns in the vent system. Install
with a minimum downward slope from unit of 1/4 inch per foot
and suspend securely from overhead structure at points no
greater than 3 feet apart. Fasten individual lengths of vent
together with at least three corrosion-resistant sheet-metal
screws.
7. Avoid venting through unheated space when possible. When
single-wall pipe does pass through an unheated space, insulate
runs greater than 5 feet to minimize condensation. Inspect for
leakage prior to insulating and use insulation that is
noncombustible with a rating of not less than 350°F. Install a tee
fitting at the low point of the vent system and provide a drip leg
with a clean out cap as shown in Figure 3. The drip leg should
be cleaned annually.
8. Keep single wall vent pipe at least 6 inches from combustible
material. For double wall vent pipe used with Category I units,
maintain clearances listed on vent pipe. The minimum distance
from combustible material is based on the combustible material
surface not exceeding 160°F. Clearance from the vent pipe (or
top of the unit) may be required to be greater than the minimum
clearance if heat damage other than fire (such as material
distortion or discoloration) may occur.
9. Where the vent passes through a combustible floor or roof, a
metal thimble 4 inches greater than the vent diameter is
necessary. If there is 6 feet or more of vertical vent pipe in the
open space between the unit heater and where the vent pipe
passes through the floor or roof, the thimble need only be 2
inches greater than the diameter of the vent pipe. If a thimble is
be 2 inches greater than the diameter of the vent pipe. If a
thimble is not used, all combustible material must be cut away
to provide a 6 inch clearance. Any material used to close an
opening must be noncombustible.
V V e e n n t t V V e e n n t t P P i i p p e e S S i i z z e e
T T r r a a n n s s i i t t i i o o n n f f o o r r I I n n s s t t a a l l l l a a t t i i o o n n
4" to 3" 3"
none 4"
6" to 5" 5"
none 6"
6" to 7" 7"
V V e e n n t t i i n n g g
R R e e q q u u i i r r e e m m e e n n t t s s
Follow standard
venting requirements.
Condensate must
be drained.
Vent must be gas tight.
Vent must be liquid and
gastight. Condensate
must be drained.